MSENSE BM.pptx

MSENSE® BM Online bushing monitoring system in ETOS® © MR 8/2/24 CONTENT + What is Msense ® BM + Bushing basics + BM in ETOS ® + Hardware + Installation + Commissioning + Troubleshooting 8/2/24 | WHAT IS MSENSE®BM + Msense BM is our solution for t...

MSENSE® BM Online bushing monitoring system in ETOS® © MR 8/2/24 CONTENT + What is Msense ® BM + Bushing basics + BM in ETOS ® + Hardware + Installation + Commissioning + Troubleshooting 8/2/24 | WHAT IS MSENSE®BM + Msense BM is our solution for the online monitoring of high voltage bushings ® + The standard so far was to measure the bushings offline in defined intervals − That meant to disconnect the transformer and the HV lines to connect a specific measurement system to the bushings − With a modulated signal you can rate the condition of the bushing + This is possible for nearly any type of bushing + Our online solution has the big advantage that it performs „online“ + No shutdown or disconnecting necessary + Just monitor bushings while they are in regular operation 8/2/24 | 3  WHAT IS MSENSE®BM CHALLENGE: GRID STABILITY Transformer + Key grid node & most valuable asset + Critical replacement-time & - effort + Failure prevention is essential 8/2/24 | 4 WHAT IS MSENSE®BM CHALLENGE: GRID STABILITY 8/2/24 | 5  WHAT IS MSENSE®BM CHALLENGE: GRID STABILITY High-voltage bushings + Cause 17% of transformer failures → Increased monitoring demand 8/2/24 | 6 CONTENT + What is Msense BM ® + Bushing basics + BM in ETOS ® + Hardware + Installation + Commissioning + Troubleshooting 8/2/24 | 7 BUSHING BASICS 8/2/24 | 8 + What is the purpose of a high voltage bushing + Type your idea of the purpose of a bushing in one sentence into the session chat. + After a short countdown everybody should send their idea together at the same time 8/2/24 | 9 BUSHING BASICS + Bushing lead high voltage and current through grounded barriers with an opening as small as possible Bushing Conductor (Insulation) Voltage & Current Separation: Transformer tank, roof of locomotive, wall of building, switch gear housing (GIS) 8/2/24 | 10 BUSHING BASICS GRADED VS NOT GRADED Not graded Graded with insulation one electrode close to flange the natural distribution of graded dielectric the dielectric field leads to a field for better non-uniform dielectric utilization of utilization of oil, main insulation close to insulation and outer flange insulation 8/2/24 | 11 BUSHING BASICS GRADED VS NOT GRADED not graded 75% capacitance insulation 100% graded insulation the natural 50% distribution of the dielectric field leads capacitance to a non-uniform graded dielectric dielectric utilization field for better of oil, main utilization of all insulation and outer 25% 75% insulation insulation components 50% 25% 0% 8/2/24 | 12 BUSHING BASICS GRADED VS NOT GRADED 8/2/24 | 13  BUSHING BASICS Measuring tap C1 C2 Aluminum foil Crepe paper C1 Main capacitance Aluminum foil Conductor Conductor 8/2/24 | 14 BUSHING BASICS REVERSE ENGINEERING + 8/2/24 | 15 BUSHING BASICS REVERSE ENGINEERING 8/2/24 | 16 BUSHING BASICS GRADING capacitance Source: Cigre Brochure 755 graded insulation capacitance graded dielectric field for Source: Küchler better utilization of all insulation components 8/2/24 | 17 BUSHING BASICS TECHNOLOGIES + OIP – oil impregnated paper (Weichpapierdurchführung) − Oil – paper insulation as seen in transformers − Oil is the insulatior; paper is used to keep the condenser foils in place + RBP – resin bounded paper (Hartpapierdurchführung) − Dry epoxy resin insulation − The epoxy resin coated flat paper is directly cured on the winding machine + RIP – resin impregnated paper − Dry epoxy resin insulation that is poured and cured under vacuum − Crepe paper is used to keep the condenser foils in place and to reinforce the structure + RIS or RIF – resin impregnated synthetics or fiber − Filled epoxy resin with sythetic fabric − Paper and oil free 8/2/24 | 18 BUSHING BASICS TECHNOLOGIES + OIP + RIP − Always keep upright − Easy storage − Oil compartment on top 8/2/24 | 19 BUSHING BASICS TECHNOLOGIES RBP Source: Cigre Brochure 755 RIP Source: Cigre Brochure 755 8/2/24 | 20 BUSHING BASICS TYPICAL FAILURES ON BUSHINGS + Diagnosis can only be done if bushing history is known 8/2/24 | 21 CONTENT + What is Msense ® BM + Bushing basics + BM in ETOS ® + Hardware + Installation + Commissioning + Troubleshooting 8/2/24 | 22  MSENSE® BM / ETOS BUSHING MONITORING ADVANTAGES AT A GLANCE Early detection of high-voltage bushing errors 8/2/24 | 23 MSENSE® BM / ETOS BUSHING MONITORING ADVANTAGES AT A GLANCE 8/2/24 | 24  BM IN ETOS® CAUSES OF ERRORS IN BUSHINGS 17% of all transformer failures and approx. 50% of all transformer fires are caused by defective bushings. Overvoltage Increased temperatu res Material/ INSULATION TRANSFORMER processing FAILURE FAILURE errors 17% 50% Ingress of of all of all moisture failures fires Natural aging Source CENELEC Guide 32, Guidelines for Safety Related Risk Assessment and Risk Reduction for Low Voltage s: Equipment Edition 1, 2014-07 8/2/24 | 25 CIGRE A2.37. CIGRE A2.37 8/2/24 | 26 BM IN ETOS® ONLINE VS. OFFLINE MONITORING Offline monitoring carries the risk that errors will not be detected in good time Opportunity for timely Offline action missed! inspection Inspection 1: Inspection 2: Inspection 3: Inspection 4: Condition o.k. Condition o.k. Obsolete due to transformer Condition failure due to transformer failure OK Obsolete Risk area (failure likely) Failure Failure Error / failure risk Critical area Overvoltage Natural (opportunity to resolve) aging Secure area Time 8/2/24 | 27 BM IN ETOS® ONLINE VS. OFFLINE MONITORING Online monitoring ensures high operational safety, efficiency and plannable maintenance Failure prevented! Online monitoring Figure showing Operational safety condition gradual worsening Operational safety condition Error messageError message Risk area (failure likely) Error / failure risk Critical area (opportunity to resolve) Overvoltage Natural aging Reaction Secure area in good time Time 8/2/24 | 28 8/2/24 | 29 CONTENT + What is MSENSE®BM + Bushing basics + BM in ETOS® + Hardware + Installation + Commissioning + Troubleshooting 8/2/24 | 30  BM IN ETOS® MSENSE BM / ETOS® BUSHING MONITORING MSENSE® BM / ETOS® components: reliable and robust Bushing coupling unit Bushing adapter Hard-/software component Adaptation of the Detection of the in the control cabinet measured voltage measured MSENSE® BM (measuring capacitor) voltage at the test tap as a single solution Protection class IP 66 of based on the bushings Elimination of ETOS® technology vibration problems Adapter available for all during operation common bushing manufacturers and Bushing monitoring types as a modular function 8/2/24 | 31 of Protection class IP 66 ETOS® 8/2/24 | 32 CONNECTIONS FOR BUSHING MONITORING MEASUREMENT CARD +Bushing L1 +Bushing L2 +Bushing L3 +Ground 8/2/24 | 33 CONNECTIONS FOR BUSHING MONITORING MEASUREMENT CARD +VT/ L1 +VT/ L2 +VT/ L3 +Neutral 8/2/24 | 34 CONTENT + What is MSENSE®BM + Bushing basics + BM in ETOS® + Hardware + Installation + Commissioning + Troubleshooting 8/2/24 | 35 MSENSE®BM CONNECTION FOR BUSHING MONITORING 8/2/24 | 36 MSENSE®BM 8/2/24 | 37 MSENSE®BM QUIZ + MSENSE®BM Quiz 8/2/24 | 38 CONTENT + What is MSENSE®BM + Bushing basics + BM in ETOS® + Hardware + Installation + Commissioning + Troubleshooting 8/2/24 | 39 MSENSE®BM 8/2/24 | 40 MSENSE®BM monitoring cubicle voltages bushings voltages reference system 8/2/24 | 41 FIELD TEST: 1 Field test in a 123kV indoor substation in Regensburg, Germany + Start: Nov. 2014 + Test objects: 123kV RIP-bushings Transformer- bushings C1(1a) C1(1b) C1(1c) in nF 0.324 0.323 0.320 8/2/24 | 42 FIELD TEST: 2 Field test in a power plant (420kV step-up transformer bank), Germany + Start: Aug. 2016 + Test objects: 420kV-RIP bushings for single phase transformer (Note: diff. Variants) Transformer- bushings C1(1U) C1(1V) C1(1W) in nF 0.630 0.611 0.632 8/2/24 | 43 FIELD TEST: 2 + The main capacitance of outdoor 420kV-bushing shows a limited deviation + No increase of capacitance exceeding 5% is detected during field test + The fluctuation and unbalance of mains voltage have no influence on the results + The small deviation is caused by the fluctuation of load profile of the transformers 8/2/24 | 44 THE POWER BEHIND POWER. reinhausen.com 8/2/24 45 PARAMETERS TO BE MONITORED +Changes in main capacitance ΔC − Increasing main capacitance results from breakdowns between single conductive layers +Changes in dissipation factor Δtan δ − If tan δ increases, the temperature rises which leads to faster aging until partial discharge and or flash-overs occur 1 Temperature Two major influences and 2 Network imbalances challenges for online monitoring systems U1Ref amplitude  C angle  tan δ U2Ref Source: Dr. Bernhard Heil, HSP, 2013 U3Ref Transform E | DOUBLE-REFERENCE METHOD +Comparison between two out of three bushings +  compensation of temperature influences on main capacitance and dissipation factor as all 3 bushings have the same temperature 1 +voltage system comparison with the reference system (VTs)  compensation of network unbalances 2 +If the main capacitance of one bushing increases comparing to the other two bushings (reference), there will be an event/warning comparison tanδ comparison C IC IT IC IT   IR U IR U phase 1 phase 2 phase 1 phase 2 8/2/24 | 47