EP-EPP-P7-G2 Guidelines for Information in Basic and Final Design PDF

# EP-EPP-P7-G2 Guidelines for Information in Basic and Final Design ## Table of Contents | Contents | Page | |---|---| | Title Page | 1 | | Document Control & Issue Record Page | 2 | | Table of Contents | 3 | | 1 Purpose | 4 | | 2 Scope | 4 | | 3 Abbreviations, Definitions of Terms & Key Reference...

# EP-EPP-P7-G2 Guidelines for Information in Basic and Final Design ## Table of Contents | Contents | Page | |---|---| | Title Page | 1 | | Document Control & Issue Record Page | 2 | | Table of Contents | 3 | | 1 Purpose | 4 | | 2 Scope | 4 | | 3 Abbreviations, Definitions of Terms & Key References | 4 | | 4 Introduction | 12 | | 4.1 Responsibilities in the Design | 12 | | 4.2 Connection Process Overview | 13 | | 4.2.1 Stage 1: Preliminary Connection Approval | 14 | | 4.2.2 Stage 2: Final Connection Approval | 15 | | 4.3 Ownership Boundaries | 15 | | 4.4 Notice to Users of these Guidelines | 15 | | 5 Design of a PV System | 16 | | 5.1 Overview | 16 | | 5.2 Basic Design: Electric Single Line Diagram | 16 | | 5.3 Basic Design: Site Plan | 16 | | 5.4 Basic Design: Basic Design Report | 16 | | 5.5 Checklist for Kahramaa Basic Design Evaluation | 17 | | 6 PV System Final Design | 17 | | 6.1 Overview | 17 | | 6.2 Final Design Documentation | 18 | | 6.2.1 Final Design Documentation: Electric Single Line Diagram | 18 | | 6.2.2 Final Design Documentation: Layout of the PV System | 18 | | 6.2.3 Final Design Documentation: Supporting Structures | 18 | | 6.2.4 Final Design Documentation: Design Report | 19 | | 6.2.5 Final Design Documentation: Quality Assurance Documents | 19 | | 6.3 Design Report for PV Systems ≤ 11 kW | 19 | | 6.3.1 Wiring Diagram | 19 | | 6.3.2 Planimetry and String layout | 21 | | 6.3.3 Datasheets | 21 | | 6.3.4 Mechanical design information | 21 | | 6.3.5 Emergency systems | 21 | | 6.3.6 Estimation of the yearly energy production | 21 | | 6.4 Design Report for PV Systems > 11 kW | 21 | | 6.4.1 Design Report Content | 21 | | 6.4.2 Wiring Diagram | 24 | | 6.4.3 Planimetry and String layout | 25 | | 6.4.4 Datasheets | 26 | | 6.4.5 Mechanical design information | 26 | | 6.4.6 Emergency systems | 26 | | 6.5 Checklists for Kahramaa Final Design Evaluation | 26 | | 6.5.1 Checklist for Final Design Evaluation of PV Systems ≤ 11 kW | 27 | | 6.5.2 Checklist for Final Design Evaluation of PV Systems > 11 kW | 27 | ## 1 Purpose The purpose of these guidelines is to help the Consultant/Contractor to prepare the information and technical documents required for designing a PV System. ## 2 Scope During the Connection Process, the Consultant/Contractor of the Customer should deliver to Kahramaa a set of documents, reports and information required during the Connection Process steps. This document contains specific guidelines **DISCLAIMER** This document is a guideline for the information that the designer of a PV System (Consultant or Contractor) has to deliver to Kahramaa via the integrated system with Baladiya. This document is not a guideline for designing a PV System, which is the responsibility of the Approved Consultant/Contractor. The document lists a minimum set of requirements for delivering the information for obtaining the approvals for connecting a PV System to Kahramaa network. The Consultant/Contractor should consider the following guideline and checklists as a starting point. ## 3 Abbreviations, Definitions of Terms & Key References ### Abbreviations | Abbreviation | Description | |---|---| | AC | Alternating Current | | AFCI | Arc Fault Circuit Interrupter | | ASTM | American Society for Testing and Materials | | BAPV | Building-Attached Photovoltaic Modules | | BIPV | Building-Integrated Photovoltaic modules | | COS | Power factor| | DC | Direct Current | | IEC | International Electrotechnical Commission | | GHI | Global horizontal irradiance | | IP | Interface Protection | | IR | Infrared | | ISO | International Organization for Standardisation | | ITP | Inspection and Test Plan | | LOM | Loss of Mains | | LV | Low Voltage (namely 220/127 V or 380/220 V or 400/230 V) | | LVRT | Low Voltage Ride Through | | MV | Medium Voltage (namely 13.8kV or 33 kV) | | MS | Method Statement | | NEC | National Electrical Code | | NFPA | National Fire Protection Association | | P | Active power | | PELV | Protected Extra Low Voltage | | Pnom | Nominal active power of the equipment | | POA | Plane of Array| | PPE | Personal protective equipment | | PR | Performance Ratio | | PV | (Solar) Photovoltaic | | Q | Reactive Power | | RCD | Residual Current Device | | ROCO | Rate of Change of Frequency expressed in Hz/s | | S/Sn | Apparent Power | | SELV | Safety extra-low voltage| | SR | Soiling Ratio| | STC | Standard Test Condition | | UL | Underwriters Laboratories | | UV | Ultraviolet | | Vnom | Nominal Voltage | | WMO | World Meteorological Organization | | EP | Electricity Planning Dept | ### Term | Term | Description | |---|---| | AC Module | PV module with an integrated inverter in which the electrical terminals are AC only | | Active Power | Active Power is the real component of the apparent power, expressed in watts or multiples thereof, e.g. kilowatts (kW) or megawatts (MW). In the text, this will be generically referred as Por Pnom in case of the nominal active power of equipment | | Apparent Power | The product of voltage and current at the fundamental frequency, and the square root of three in the case of three-phase systems, usually expressed in kilovolt-amperes (kVA) or megavolt-amperes (MVA). It consists of a real component (Active Power) and the reactive component (Reactive Power). This will be generically referred to S or Sn in case of the rated apparent power of equipment | | Apparent power of an Inverter | The rated apparent power of an Inverter is the product of the rms voltage and current and is expressed in kVA or MVA. | | Auxiliary Supply Power | Electricity supply for supporting auxiliary systems and services such as Interface Protection or circuit breaker and contactor opening coils. | | Building-Attached Photovoltaic Modules (BAPV modules) | Photovoltaic modules are considered to be building-attached if the PV modules are mounted on a building envelope. The integrity of the building functionality is independent of the existence of a building-attached photovoltaic module. | | Building Attached Photovoltaic system (BAPV system) | Photovoltaic systems are considered to be building attached if the PV modules they utilise do not fulfil the criteria for BIPV modules. | | Building-Integrated Photovoltaic modules (BIPV modules) | Photovoltaic modules are considered to be building-integrated if the PV modules form a construction product providing a function. Thus, the BIPV module is a prerequisite for the integrity of the building's functionality. If the integrated PV module is dismounted (in the case of structurally bonded modules, dismounting includes the adjacent construction product), the PV module would have to be replaced by an appropriate construction product. The building's functions in the context of BIPV are one or more of the following: * mechanical rigidity or structural integrity * primary weather impact protection: rain, snow, wind, hail * energy economy, such as shading, daylighting, thermal insulation * fire protection * noise protection * separation between indoor and outdoor environments * security, shelter or safety | | Building-Integrated Photovoltaic system (BIPV system) | Inherent electro-technical properties of PV, such as antenna function, power generation and electromagnetic shielding etc., alone do not qualify PV modules to be building-integrated. Photovoltaic systems are considered to be building-integrated if the used PV modules fulfil the criteria for BIPV modules. | | Circuit Breaker (CB) | As per the Kahramaa Electricity and Wiring Code definition | | Connection Point | Also referred to as Point of Connection, is the interface point at which a PV System of the Customer is connected. | | Consultant | A qualified consultant for the design of grid-connected solar PV Systems. Any Person supplied with electricity services for his own consumption. In this context, this term will also be used to refer to a User owning a solar PV System. | | Customer | | | Contractor | A certified contractor for the installation of grid-connected solar PV Systems. | | Delay time (of a protection relay) | Indicates the minimum duration of a fault detected by the protection relay before the output of the protection relay is triggered. | | Delivery Point | The interface point at which electrical energy is delivered by Kahramaa to a Demand Facility or Generating Unit or by a Demand Facility or Generating Unit to Kahramaa. | | Distribution System / Distribution Network | Qatar electrical infrastructure (lines, cables, substations, etc.) at 33 kV and below, operated by Kahramaa. The Distribution network can be either a Medium or Low Voltage system for the scope of the present document and in accordance with international standards: * A Low Voltage (LV) Distribution System is a network with a nominal voltage lower than 1 kV AC or 1.5 kV DC. The LV network in the State of Qatar is 240/415 V ± 6%, 3 Phase, 4 Wire. * A Medium Voltage (MV) Distribution System is a network with nominal voltage included in the range from 1 kV AC up to 33 kV. The MV Distribution System nominal voltages in Qatar are 11, 22 and 33 kV. * Electrical network voltages equal to or higher than 33 kV are not considered in this document. According to the Transmission Grid Code, the 33 kV is considered a sub-transmission network. To avoid doubt, the term Distribution Network will be preferred in this document in place of Distribution System. | | Electricity Transmission Network (ETN) | Qatar electrical infrastructure (lines, cables, substations, etc.) from above 33 kV up to 400 kV operated by Kahramaa. | | Global horizontal irradiance (GHI) | Direct and diffuse irradiance incident on a horizontal surface expressed in Wm². | | In-plane irradiance (Gi or POA) | The sum of direct, diffuse, and ground-reflected irradiance incidents upon an inclined surface parallel to the plane of the modules in the PV array, also known as plane-of-array (POA) irradiance. It is expressed in W/m² PV module maximum overcurrent protection rating determined by IEC 61730-2 (Note: This is often specified by module manufacturers as the maximum series fuse rating). | | IMOD_MAX_OCPR | | | Inspection | Examination of an electrical installation in order to ascertain correct selection, design and proper erection of electrical equipment. | | Interface protection (IP) | Electrical protection part of the solar PV System that ensures the PV System is disconnected from the network in case of an event that compromises the integrity of Kahramaa's distribution network. | | Inverter | Electric energy converter that changes direct electric current to single-phase or polyphase alternating current. | | Irradiance (G) | Incident flux of radiant power per unit area expressed in W/m². | | Irradiation (H) | Irradiance integrated over a given time interval and measured in energy units (e.g. kWh/m²/day). | | Islanding | Situation where a portion of the distribution network containing generating plants becomes physically disconnected from the rest of the distribution network. One or more generating plants maintain electricity supply to such isolated parts of the distribution network. | | Load Flow | It is a numerical analysis of the electric power flow in a transmission and/or distribution systems. A power-flow study usually uses simplified notations such as a one-line diagram and per-unit system, and focuses on various parameters, such as voltages, voltage angles, real power and reactive power. It analyses the power systems in normal steady-state operation. | | Loss Of Mains (LOM) | Represents an operating condition in which a distribution network, or part of it, is separated from the main power system (on purpose or in case of a fault) with the final aim of de-energisation. The protection that detects this condition is known as anti-islanding protection. | | Main Meter | It is the bidirectional smart meter installed at the Connection Point which measures the amount of electric energy actually exchanged (import or export) by the Customer with the distribution network. | | Maximum Available Active Power Output | This is the Active Power Output based on the primary resource (for example, sun irradiance) and the maximum steady-state efficiency of the Solar PV System for this operating point. | | Maximum Capacity (Pmax) | It is the maximum continuous active power which a Generating Unit can produce, less any auxiliary consumption associated used to facilitate the operation of that Generating Unit. The Maximum Capacity shall not be fed into the distribution network as specified in the Connection Agreement. In this document, this term is also referred to as Maximum Connected Capacity. | | Module Integrated Electronics | Any electronic device fitted to a PV module that provides control, monitoring or power conversion functions (Note: Module integrated electronics may be factory fitted or assembled on-site). | | National Control Centre (NCC) | Main Kahramaa's facility used to operate and control/maintain the Electric Power System. | | Peak Power (Wp) | The output power achieved by a Photovoltaic Module under Standard Test Conditions (STC). It is measured in Wp (W peak). The sum of the peak power of the photovoltaic modules of either a string or an array determines the peak power of the string and the array, respectively (usually measured in kWp). The peak power of a photovoltaic array at STC is conventionally assumed as the rated power of the array. | | Photovoltaic ( PV ) cell | The most elementary device that exhibits the photovoltaic effect, i.e. the direct non-thermal conversion of radiant energy into electrical energy. | | Power Factor | It is the ratio of Active Power to Apparent Power. | | Power Park Module (PPM) | A unit or ensemble of units generating electricity, which is either non-synchronously connected to the network or connected through power electronics, and that also has a single Connection Point to the ETN. | | PV Array | Assembly of electrically interconnected PV modules, PV strings or PV sub-arrays. For the purposes of these Technical Standards, a PV Array comprises all components up to the DC input terminals of the Inverter. | | PV Module | PV modules are electrically connected PV cells packaged to protect them from the environment and protect the users from electrical shock. | | PV String | A set of series-connected PV modules. | | PV String Combiner Box | A box where PV strings are connected, which may also include circuit breaker, monitoring equipment, and electrical protection devices. | | Rated Active Power | Represents the sum of the nominal active power of all the Solar PV Units which compose the Solar PV System; it is generally referred to as Pnom of the Solar PV System. | | Reactive Power | Represents a component of the apparent power at the fundamental frequency, usually expressed in kilovar (kVAr) or Megavar (MVAr). | | Reactive Power Capability | Defines the reserves of inductive/capacitive reactive power which can be provided by a generating system/unit. The reactive power capability usually varies with the active power and the voltage of the generating system/unit. | | Residual Current Device (RCD) | A sensitive switch that disconnects a circuit when the residual current exceeds the operating value of the circuit, referred as RCD in this document. | | Soiling ratio (SR) | A ratio of the actual power output of the PV array under given soiling conditions to the power that would be expected if the PV array were clean and free of soiling. | | Solar PV System | This term also has the same meaning as Power Plant or User's System or Grid User, defined in the Transmission Grid Code. It is a solar PV installation of not more than 25 MW and not less than 1 kW capacity installed in one Premise and connected in parallel to Kahramaa's Distribution Network. This document aims to be considered a power plant with one or more Solar PV Units. Besides, circuits and auxiliary services are also part of a solar PV System. To avoid doubt, in this document, the generic term Solar PV System is considered equivalent to solar PV System. This PV System includes the PV array, controllers, inverters, batteries (if used), wiring, junction boxes, circuit breakers, and electrical safety equipment. | | Solar PV System Meter | It is the smart metering installed at the output point of the solar PV System and measures the total energy produced from the Solar PV Units. | | Solar PV Unit | A group of devices that collects the sun's irradiance in a Solar PV System, together with all plant and apparatus and any step-up transformer which relates exclusively to the operation of that part of the same Solar PV System. Only units that are Inverter based (i.e., Asynchronously connected to the Distribution Network through power electronics devices) are considered in this document. For these Technical Standards, this definition will be equivalent to that of the Power Park Module as given in the Transmission Code. For the avoidance of doubt, in this document, the generic term Solar PV Unit will be considered equivalent to a solar PV Unit. | | Standard test conditions (STC) | Reference values of in-plane irradiance (1 000 W/m2), PV cell junction temperature (25 °C), and the reference spectral irradiance defined in IEC 60904-3. | | Switch | As per the Kahramaa Electricity and Wiring Code definition. | | Testing | Implementing measures in an electrical installation to prove its effectiveness (Note: It includes ascertaining values using appropriate measuring instruments, said values not being detectable by inspection). | | Time Current Curve (TCC) | The time current curve plots the interrupting time of an overcurrent device based on a given current level. These curves are used for the protection coordination and are provided by the manufacturers of electrical overcurrent interrupting devices such as fuses and circuit breakers. | | THD (Total Harmonic Distortion) | Concerning an alternating quantity, it represents the ratio of the r.m.s. value of the harmonic content to the r.m.s. value of the fundamental component or the reference fundamental component. | ## Key References 1. The Qatar Transmission Grid Code – Issue ES-M4 – Revision 0.0 - March 2020 and amendments in force until 02/2022 (in this document referred to as "Transmission Code") 2. CS-CSI-P1/C1 Kahramaa's Low Voltage Electricity Wiring Code 2016 3. Qatar Construction Specifications, Latest edition 4. Safety Rules for the Control, Operation and Maintenance of Electricity Transmission & Distribution System of Qatar General Electricity & Water Corporation. 5. Inspection and Testing Checklists 6. System Operation Memorandum (SOM). 7. Kahramaa interlocking document, (Qatar Power Transmission System Expansion - Latest phase – Substations). 8. ET-P26-G1 Guidelines for Protection Requirements. 9. ES-EST-P1-G1 Guidelines for System Control Requirements for Power Supply to Bulk Consumers. 10. ET-P20-S1 Transmission Protection Standards for TA and ET Projects. 11. ES-M2 Qatar Power System Restoration Plan; and 12. ES-M3 System Emergency, Categorization, Communication & Restoration Responsibility. 13. QCDD (Qatar Civil Defence Department) regulations 14. CS-CSI-P2 E_W – Infrastructure Preparation for Service Connection Purpose v3 15. CS-CSI-P3 E_W – Services Inspection v5 16. CS-CSI-P4 – Low Voltage Electrical Contractor Licensing v3 17. CS-CSI-P5 – Handling of Contractors Violations Procedure v2 18. CS-JCU-P1– Illegal Connections Reconnections v3 19. CS-CSM-P2 E_W – Supply Connection and Disconnection 20. -CS-AMI-P1 – AMI operations 21. CS-MAS-P2 E_W – Meter Installation v4 22. CS-MAS-P3 – Maintenance of Electricity and Water Meter v2 23. CS-MAS-P5 – Materials Submittal Review _ Approval Procedure v2 24. Energy and Water Conservation Code 2016 25. EP-EPD-P1 – Electricity Supply Approval 26. EP-EPD-P4 – Processing Service Notes 27. EP-EPD-P6 - 11kV – Load Flow Study 28. EP-EPM-P4 – Material Specification Standards 29. EP-EPM-P6 Tech Evaluation of Materials for KM Elect Dist. Tenders and External Submittal 30. EP-EPM-P7 Prequalification of Materials and Related Manufacturers and Factories for KM Elect Dist. Net 31. EP-EPP-C1 – Electricity Planning Regulations for Supply 32. EP-EPP-P3 – Early Arrangement for Supply Connection 33. EP-EPP-P5 – Electricity Supply Application 34. EP-EPT-P2 – Basic Concept Report-Direct Connection Notification 35. EP-EPT-P3 – Peak Demand Forecast 36. EP-EPT-P4 – Power System Studies and Five Years Development Plan 37. ES-ESN-P3 – Dispatching Procedure v2 38. ES-ESN-P4 – Bulk Industrial Consumers Energy Meter Readings Collection v2 39. ES-ESP-P1 – Creating Operational Load Forecast v2 40. ES-ESP-P2 – Long Term Operation Planning v2 41. ES-ESP-P3 – Develop Monitor Energy Purchase Schedules and Allocation Plans v2 42. ES-ESP-P4 – Operation Studies v2 43. ES-ESP-P7 – Develop Surplus Available Capacity Plan for Marketing v2 44. ES-M4 – Qatar Transmission Grid Code 2020 45. ET-P26 ETD Responsibilities for Bulk Consumer's Request for Supply of Electricity 46. -CS-CSB-P1 – Bulk Supply of Electricity and Water 47. PW-PWP-P1 E_W – Demand Forecasting 48. PW-PWP-P2 – Additional Capacity Planning 49. PW-PWP-PL1 – Planning _ Procurement Policy 50. PW-PWR-P2 – Renewable Energy Standards Development 51. IEC 60364-6 – Low voltage electrical installations. Part 6: Verifications 52. IEC 61010 Safety requirements for electrical equipment for measurement, control and laboratory use 53. IEC 61557 – Electrical safety in low voltage distribution systems up to 1000 V AC and 1500 V DC 54. IEC 61724-1 – Photovoltaic system performance. Part 1: Monitoring 55. IEC 61724-2 - Photovoltaic system performance. Part 2: Capacity evaluation method 56. IEC 61724-3 Photovoltaic system performance. Part 3: Energy evaluation method 57. IEC 61730-2 Photovoltaic (PV module safety qualification. Part 2: Requirements for testing 58. IEC 62446-1 Photovoltaic (PV) systems. Requirements for testing, documentation and maintenance. Part 1: Grid connection systems. Documentation, commissioning, tests and inspection 59. IEC TS 62446-3:2017- Photovoltaic (PV) systems - Requirements for testing, documentation and maintenance - Part 3: Photovoltaic modules and plants Outdoor infrared thermography 60. IEC 61829:2015 Photovoltaic (PV) array On-site measurement of current-voltage characteristics 61. IEC 62548 – Photovoltaic (PV) arrays. Design requirements ## Companion Documents The documents listed hereinafter have to be considered a compendium of the current document. Therefore, they should be carefully read in addition to this. a) EP-EPP-P7 Electricity Supply Approval for REG connection b) EP-EPP-P7-S1 Technical Specifications for the Connection of PV Systems to the Network c) CS-CSI-P3-G2 Inspection and Testing Guidelines for Solar PV Systems Connected to LV and MV Network, last revision d) EP-EPM-G2 Guidelines for the Eligibility of Manufacturers' Equipment, last revision e) PW-PWR-G2 Safety related to the installation of Solar PV Systems, last revision f) KM-PW-PL01-Kahramaa policy for Renewable Energy systems connected to the distribution network ## 4 Introduction ### 4.1 Responsibilities in the Design During the implementation of a PV System, there are two stages, each one with a different design level of a PV System: 1. Basic Design 2. Final Design The Basic Design shall contain minimum information to demonstrate: * The maximum capacity allowed as an Eligible Customer. * Enough roof and/or ground space is available for this capacity. * Energy Production data kWh/year * Type of building and intended implementation to verify if there are architectural, environmental, or other restrictions. * The location of the Customer for network purposes analysis. * The basic diagram of the PV System. * The basic characteristics required to run a power flow and standard analysis and verify if the PV System affect (or not) the Kahramaa network and other Customers in the grid. The final design shall contain the full design of the PV System that includes the previous lists, plus the manufacturer's equipment technical specification, the technical documentation, rationale of the design, interface protection proposed settings and several additional details explained in Chapter 0 of this document. The designer is responsible for preparing this Basic Design and the Final Design, i.e., the Kahramaa approved Consultant/Contractor selected by the Customer who signs the design presented. Figure 1 summarises the timeline of the verification process and other related activities according to the different roles: * The Consultant/Contractor is in charge of the Basic Design and Final Design. * Kahramaa is in charge of carrying out the evaluation only of those parameters that may affect the Kahramaa Distribution Network. Kahramaa does not evaluate the design itself of the PV System but its impact on the Distribution Network. The diagrams in Figure 1 and Figure 2 do not consider the information flow, the documents produced in the process and the checks between actions. **All PV Systems** | Step | Responsible | |---|---| | Selection of a Consultant or Contractor | Consumer | | Basic Design of the PV System | Consuntant or Contractor | | Application through MME for Electricity Services and a new connection of a REG | Consuntant or Contractor | | Grid Impact Assessment | Kahramaa | | Preliminary Connection Approval | Kahramaa | ***Figure 1-Responsible for the Basic Design of a PV System*** *1 The number in the steps boxes correspond to the step in the internal process of Kahramaa* **PV Systems ≤ 11 kW** | Step | Responsible | Supervision | |---|---|---| | PV System Design Development | Consuntant or Contractor | | | PV System Report for ≤ 11 kW | Consuntant or Contractor | Kahramaa | | PV System Design Uploading | Consuntant or Contractor | Kahramaa | | REG Final Design Evaluation for ≤ 11 kW | Consuntant or Contractor | Kahramaa | | Final Connection Approval | | Kahramaa | **PV Systems > 11 kW** | Step | Responsible | Supervision | |---|---|---| | PV System Design Development | Consuntant or Contractor | | | PV System Report for > 11 kW | Consuntant or Contractor | Kahramaa | | PV System Design Uploading | Consuntant or Contractor | Kahramaa | | REG Final Design Evaluation for > 11 kW | Consuntant or Contractor | Kahramaa | | Final Connection Approval | | Kahramaa | ***Figure 2-Responsible for the Final Design of a PV System*1* *1 As shown in Figure 2, there is a division in the evaluation process according to the PV System size. PV Systems that are up to 11 kW have a lower evaluation level than PV Systems with nominal power above 11 kW.* *The difference is in the Final Design evaluation and not the Basic Design. The Report for PV Systems above 11 kW is more difficult with the required information and data, and this is detailed in Chapter 0 of this document.* *It is not the responsibility of Kahramaa to check nor to approve the mechanical design of the PV systems, the mechanical and fire safety of the building without or with the PV systems, as well as any issues that regard the compatibility of the PV Systems with the aesthetic rules or regulations in force, shall be the role of the MME deputed to manage the above-mentioned duties and responsibilities.* ### 4.2 Connection Process Overview The Connection process for connecting a solar PV System will follow three main stages, as depicted in Figure 3. **Solar Module- Invert er** **Data Communication** **Public Electricity Gric** 1. **Grid Impact Assessment** * (preliminary connection approval) 2. **Final Design Evaluation** * (final connection approval) 3. **Inspection, Testing and Energization** ***Figure 3- Main Stages in the Connection Process*** These three high-level stages also consider some activities inside each Stage. Each Stage has a main outcome that enables the Consultant/Contractor to move to the next Stage. The main outcome of the first Stage is the approval of the Preliminary Connection Approval to be issued by Kahramaa based on the Basic Design, some additional information required and network analysis. The main outcome of Stage 2 is the approval of the Final Connection Approval to be issued by Kahramaa based on the Final Design and some additional information required. This document focuses on Stage 1 and Stage 2 regarding the information that the Consultant/Contractor has to prepare and deliver to Kahramaa (via the integrated system with Baladiya) for obtaining the respective approvals in each Stage (1 and 2). ### 4.2.1 Stage 1: *Preliminary Connection Approval* In this Stage, there are two key activities to be performed: your Consultant's Basic Design and the verification of Kahramaa if the solar PV System can be connected to Kahramaa network without jeopardising the network and other Customers. The Consultant/Contractor has to perform the application and request via the Municipality integrated system (Baladiya) and the Customer perform the Application Fee payment required for this Stage. Kahramaa may decide to not charge in this Stage according to the type of Customer and location. The Basic Design should contain the capacity of your system, how many solar panels are required, the size of the roof and if you will require a modification of the structure of your roof or premises for installing your PV System. For example, have to be checked if your roof can support the weight of the solar panels or if the panels may affect the urban landscape or may not be permitted because of the historical architecture. For these reasons, the Consultant/Contractor should enter the request via the Municipality and obtain, at the same time, the *Build Permit*. When Kahramaa receives the application and the payment, it can evaluate the basic design. First, verify if there is complete documentation, if it is correct, and if it is technically feasible to install a REG on the feeder of the distribution network and in the specific Point of Connection (POC) indicated. This is called *Grid Impact Assessment*. During this high-level assessment, Kahramaa may require some clarifications from your side. After a predefined deadline (respecting the quality of service to Customers), Kahramaa should issue his *Preliminary Connection Approval* or rejection based on his high- level assessment. In case of rejection, Kahramaa should explain the reasons to your Consultant or Contractor. Together with the *Preliminary Connection Approval*, Kahramaa will perform the feeder reservation, i.e., once the connection is preliminary approved, there will be reserved capacity on that specific feeder for the connection of the PV System, with precedents to other connection requirements that may come later. ### 4.2.2 Stage 2: *Final Connection Approval* If the *Preliminary Connection Approval* was obtained in the previous Stage, the Consultant or Contractor can go ahead and develop a full design of your PV System, fully compliant with the “*EP-EPP-P7-S1*” *Technical Specifications for the Connection of PV Systems to the Network* document issued by Kahramaa and the National Codes and regulations. The Consultant or Contractor has to deliver a set of reports and documents in the process part of the *Final Design*. Kahramaa will evaluate based on the documentation and the checklist in this document if the PV System *Final Design* contains all required documents and data. Kahramaa will also evaluate if all the main data are consistent with those delivered in the previous Stage and if they are consistent with the specific PV technology. After reviewing the check-listed topics of the final design, Kahramaa may observe the design. After Kahramaa verifies that the designed conditions and characteristics of the PV System do not affect the distribution network and other Customers, it will issue a *Final Connection Approval*. Therefore, the Customer should perform the payment of the Connection Fee for connecting the PV System. ### 4.3 Ownership Boundaries The boundary between Customer and Kahramaa is regulated as follows: * The boundary between Kahramaa and the Customer is the *Connection Point* as indicated in the connection schemes of the “*EP-EPP-P7-S1*” *Technical Specifications for the Connection of PV Systems to the Network*” document. * The respective ownership of PV System or equipment shall be recorded in the Connection Agreement between Kahramaa and the Customer in a diagram. ### 4.4 Notice to Users of these Guidelines This document is for use by employees of Kahramaa, Consultants, and Contractors. The checklists included in this document are for the common use of Kahramaa and the approved Consultants/Contractors. Users of this document should consult all applicable laws, regulations and standards. Users are responsible for observing or referring to the applicable regulatory requirements. Kahramaa does not, by the publication of its standards, intend to urge action that is not in compliance with applicable laws, and these documents may not be construed as doing so. Users should be aware that this document may be superseded at any time by the issuance of new editions or may be amended from time to time through the issuance of amendments, corrigenda, or errata. All users should ensure that they obtained this document's latest edition uploaded on the Kahramaa website. Finally, unless otherwise specified, the User shall refer to all applicable Kahramaa Standards, Qatar Standards, or International Standards mentioned in this document. ## 5 Design of a PV System ### 5.1 Overview The Basic Design is a key part of Stage 1 of the Connection Process, and it is connected with the activities under 5.1.1 of the General Connection Process. **Application through the unified system of MME for Electricity Services (Baladiya System) and a new connection of a REG for the following customer's categories:** * Existing customer with New PV installation request * New customer with PV Installation request ***Figure 4- Connection Process steps related to submitting the Basic Design*2* *2 The "Application through the unified system of MME for Electricity Services and a new connection of