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Tài liệu về quy trình test máy biến áp trong nhà máy nhiệt điện mông dương 2 quảng ninh...................................................................................................................................................................................................................
FOR COMMENT B A Rev Owner 14-Mar-13 15-Jan-13 Date S.J Cho S.J Cho Prepared C.K Kim C.K Kim Checked Y.M Cho Y.M Cho Approved For AES Comment For Comment Details of Revision AES-VCM MONG DUONG POWER COMPANY LIMITED Consultant POWER ENGINEERING CONSULTING JOINT STOCK COMPANY Contractor Doosan Heavy Industries & Construction Co., Ltd PC Project : T10206 MONG DUONG II x 560MW(NET) THERMAL POWER PLANT UAS DN02 UNIT P0 KKS Title COMMISSIONING PROCEDURE FOR START-UP TRANSFORMER (SAT) OF SITE TEST Document No BCT01 Reg No 840001 Rev B Pages –No T10206-DN02-P0BCT01-840001 of 24 Rev B Table of Contents 1.0 GENERAL PURPOSE 1.1 Introduction & Commissioning Boundary 1.2 Scope of Commissioning Package 1.3 The Safety Knowledge in Operation 2.0 CONSTRUCTION & DIMENSION CHECK 3.0 RATIO TEST 3.1 Purpose 3.2 Connection 3.3 Test sequence 3.4 Applied standard 3.5 Acceptance criteria 4.0 PHASE RELATIONSHIP CHECK 4.1 Purpose 4.2 Connection 4.3 Test sequence 10 4.4 Applied standard 10 4.5 Acceptance criteria 10 5.0 INSULATION RESISTANCE MEASUREMENT 11 5.1 Purpose 11 5.2 Connection 11 5.3 Test sequence 12 5.4 Applied standard 12 5.5 Acceptance criteria 12 6.0 AUXILIARY WIRING & FUNCTIONAL TEST 12 7.0 EXCITATION CURRENT TEST 13 7.1 Purpose 13 7.2 Connection 13 7.3 Test sequence 13 7.4 Applied standard 13 Page of 24 Rev B 8.0 POLARITY OF BCT 14 8.1 Purpose 14 8.2 Connection 14 8.3 Acceptance criteria 14 9.0 NGR TEST 14 9.1 Purpose 14 9.2 Performance 14 10.0 INSULATION OF OIL 15 10.1 Purpose 15 10.2 Performance 15 11.0 SITE TEST & CHECK SHEETS 15 11.1 Site test & equipment list 15 11.2 Insulation resistance test 16 11.3 Measurement of voltage ratio test 17 11.4 Vector group test (Phase relationship test) 18 11.5 No load current test 19 11.6 Wiring check of protection equipment 20 11.7 Auxiliary equipment check 21 11.8 Appearance & dimension check 22 11.9 Polarity of BCT 23 11.10 NGR test 24 11.11 Insulation of oil 24 12.0 ATTACHMENTS .24 Attachment 12.1 Protection & metering single line diagram for start-up auxiliary transformer Page of 24 Rev B 1.0 GENERAL PURPOSE 1.1 Introduction & Commissioning Boundary This procedure covers the activities required for testing and commissioning of the following Start-up transformer (SAT) consist of the below table KKS Number BCT BCT01 BCT02 1.2 Description START-UP TRANSFORMER (SAT) NGR FOR SAT NGR FOR SAT Scope of Commissioning Package The commissioning package for Battery Charger, consist of the following packages : KKS Number BCT BCT01 BCT02 Description START-UP TRANSFORMER (SAT) NGR FOR SAT NGR FOR SAT 1.3 The Safety Knowledge in Operation 1.3.1 Before the start of any testing it should be confirmed that all power supplies to the system have been isolated or that they are in a known condition The Commissioning engineer is responsible for the safety of those personnel working of the system Check for the presence of harmful electrical or mechanical potential energy before starting work 1.3.2 Project lockout / Tag out (LOTO) procedures must be adhere to all test area 1.3.3 Fire is strictly prohibited on site, no smoking there must be a warning mark in hazardous area 1.3.4 Strictly comply with the safety and environmental protection regulations of local government 1.3.5 In order to ensure the reliable operation of every part of the system, strictly obey the corresponding procedures 1.3.6 Have a regular maintenance for the long-time standby equipment Page of 24 Rev B 1.3.7 Obey the relevant safety regulations of the power plant during commissioning all along Ensure the successful commissioning work 1.3.8 All personnel directly involved with the commissioning that will attend a kickoff safety meeting to review for the dangers Ensure that all personnel understand the process and the operation Any personnel involved in the commissioning have the authority to terminate the operation at any time, if a serious problem or safety issue develops Page of 24 Rev B Classification Description of Inspection /Test Applied Specification HICO Customer Place At Site Construction & Dimension Check Ratio Check Approved Specification H W Approved Drawing H W Phase Relationship Check (Vector group) IEC 60076-1 IEC 60076-2 IEC 60076-3 H W H W H W H H H H W W W W Insulation Resistance Measurement Auxiliary Wiring and Function Test Excitation Current Test Polarity of BCT NGR Test Insulation of oil ″ ″ ″ ″ ″ See detail in procedure ″ ″ ″ ″ ″ ″ ″ ″ Inspection and Test Remarks H : Hold Point Ro : Routine Test W : Witness point T : Type Test R : Report Review S : Special Test Page of 24 Rev B 2.0 CONSTRUCTION & DIMENSION CHECK The transformer will be checked and measured according to approved drawings, and will be made sure complying with the general specification of contract 1) Construction, painting and welding condition will be inspected visually 2) Name Plate Data will be checked 3) The inspection results shall be satisfied with approved drawings 3.0 RATIO TEST 3.1 Purpose 1) To ensure proper connections and turns ratio of transformer 2) The turns ratios of the windings on the rated-voltage connections and on all taps will be determined for the transformer 3) The applied voltage to HV winding will be about 220V 3.2 Connection 3.2.1 HV to XV Page of 24 Rev B 3.2.2 HV to YV 3.2.3 XV to YV 3.3 Test sequence 1) Supply phase 220V ac on the high voltage winding 2) Select the multiply of ratio meter in accordance of design ratio 3) Adjust the dial of ratio meter until the galvanometer indicates '0' 4) Measure ratio for the each phase by using phase selector switch 3.4 Applied standard ANSI C57.12.90 3.5 Acceptance criteria : Ratio error should be within ± 0.5 % Page of 24 Rev B 4.0 PHASE RELATIONSHIP CHECK (VECTOR CHECK) 4.1 Purpose To ensure proper connection and phase relation the vector group shall be check between HV & XV, HV & YV, XV & YV windings 1) The phase relationship check shall be checked at rated voltage tap connection 2) Three phase 220V will be applied to HV winding and the voltage shall be measured between terminals 3) The test shall be made on rated tap position 4) Vector diagram will be drawn and confirmed 4.2 Connection 4.2.1 HV to XV 4.2.2 HV to YV Page of 24 Rev B 4.2.3 XV to YV 4.3 Test sequence 1) Connect H1 and X1 phase common together 2) Supply phase 220V ac on the high voltage winding 3) Measure the voltage between high and low voltage terminals HV – XV 4.4 HV – YV XV - YV Applied standard ANSI C57.12.90 Polarity : Subtractive Vector Group : YNynyn0 (d1) 4.5 Acceptance criteria Phase relationship will be checked in comparison with voltage between measuring terminal The relationship between measured voltages must be below Polarity : Subtractive Vector Group : YNynyn0(d1) Page 10 of 24 Rev B 5.3 Test sequence 1) Transformer must be grounded 2) Tie all terminals of each winding together 3) Insulation resistance is measured by means of megger tester at 1000V dc between windings and ground 4) Insulation resistance is measured ㏁ unit 5.4 Applied standard ANSI C57.12.90 5.5 Acceptance criteria Insulation resistance between : - HV Winding to earth : ≥ 1000 ㏁ - XV Winding to earth: ≥ 1000 ㏁ - YV Winding to earth : ≥ 1000 ㏁ - Between windings : ≥ 1000 ㏁ 6.0 AUXILIARY WIRING & FUNCTIONAL TEST 6.1 Auxiliary Equipment and wiring is to be checked (tap changer, relay, temperature indicators, fans, pumps, 6.2 Functional test and operation test for protective devices and accessories (Oil level gauge, Buchhloz relay, OLTC protective relay, Pressure relief device ,Oil/Winding temperature gauges) 6.3 Acceptance criteria All accessories shall be operated properly Page 12 of 24 Rev B 7.0 EXCITATION CURRENT TEST 7.1 Purpose 1) To determine the exciting current in core 2) The distribution voltage (220~380V, 50/60Hz) shall be applied to LV winding with the other winding left open-circuit 7.2 Connection 7.3 Test sequence 1) Transformer should be grounded 2) B.C.T must be common together 3) Primary winding should be open 4) The exciting current is measured at the 220~380V & frequency 50/60Hz by three wattmeter method 7.4 Applied standard ANSI C57.12.90 Page 13 of 24 Rev B 8.0 8.1 POLARITY OF BCT Purpose To check the Polarity of BCT 8.2 8.3 Connection Acceptance criteria When Galvanometer indicates plus(+) direction, we regard it as subtractive 9.0 9.1 NGR TEST Purpose 1) The NGR will be inspected and measured according to approved drawings, and will be made sure complying with the general specification of contract 2) To check the resistance 9.2 Performance 1) Refer to attached test sheet of site test 2) Resistance value is 8.3Ω±10% Page 14 of 24 Rev B 10.0 INSULATION OF OIL 10.1 Purpose To make sure that insulation of oil has been checked 10.2 Performance 1) No Collapse of the test voltage is minimum 30 kV after filtering, because oil is not stable under the influence of bubble 2) After filtering, you have to wait minimum hours At this time, No Collapse of the test voltage is Minimum 70kV after stabilization No 11.0 SITE TEST & CHECK SHEETS 11.1 Site test & equipment list Test Equipment Megger Digital Multi-Tester Specification (Range) 1000V - 2000 ㏁ A.C : 10Amps, 500 Volts D.C : 10Amps, 500 Volts Quantity Set Test Items □ Measurement of Insulation Resistant Sets □ Voltage Ratio □ Voltage Vector Relationship □Check correct Wiring of protection Equipment connection □Control Panel and Auxiliary Equipment Check Set □Measurement of No Load Current Sets Set □For supplied Test Power Resistance : Mega-ohms Clamp-Meter Electric power cable A.C : ~ 200 Amps D.C : ~ 200 Amps Phase Sqre /Length : 10m Phase Sqre /Length : 5m Remarks Page 15 of 24 Rev B 11.2 Insulation resistance test ◆ Rating : ◆ Serial No Transformer : ◆ Test equipment : 1000V Megger ohmmeter ◆ Date : Insulation Resistance Test Measured Value (MΩ) Check Point H1 PH to Ground H2 PH to Ground H3 PH to Ground X1 PH to Ground X2 PH to Ground X3 PH to Ground X0 PH to Ground HV to LV Result Criteria : - Insulation resistance of 132kV Transformer above should be higher than 1000 ㏁ at 20℃ - Insulation resistance of 33kV Transformer applies to bellow Graph Fig - Insulation resistance of 11.5kV Transformer applies to bellow Graph Fig - Insulation resistance of 6.9kV Transformer applies to bellow Graph Fig 66kV Above Fig.1 Page 16 of 24 Rev B 11.3 Measurement of voltage ratio test ◆ Rating : ◆ Serial No Transformer : ◆ Test equipment : Voltmeter ◆ Date : Ratio Test Tap Tap No Voltage Measured Value Ratio HV LV Judge Rating 1R-1Y 2R-2Y Ratio 1Y-1B 2Y-2B Ratio 1B-1R 2B-2R Ratio (V1) (V4) V1/V4 (V2) (V5) V2/V5 (V3) (V6) V3/V6 Page 17 of 24 Rev B 11.4 Vector group test (Phase relationship test) ◆ Rating : ◆ Serial No Transformer : ◆ Test equipment : Voltmeter ◆ Date : Vector Group Test No Terminal H2 - X2 H2 - X3 H3 - X2 H3 - X3 Judgment Measured Values (V) V H2-X2 = V H2-X3 = V H3-X3 < Remark V H3-X2 □ Vector group and Connection - Dyn11 V H2-X2 = V H2-X3 = V H3-X3 < ( Vector group ) V H3-X2 ( Connection ) Page 18 of 24 Rev B 11.5 No load current test ◆ Rating : ◆ Serial No Transformer : ◆ Test equipment : Volt meter, Clamp meter ◆ Date : No load current test Voltage (V) Current (mA) REMARK H1 H2 H3 Avg H1 H2 H3 Avg Note : No Load Test Procedure 1) Exciting current shall be measured at test voltage and frequency 2) The test shall be applied to secondary winding ( LV) with the other windings left open-circuited Page 19 of 24 Rev B 11.6 Wiring check of protection equipment ◆ Rating : ◆ Serial No Transformer : ◆ Test equipment : ◆ Date Digital Multi-tester : Wiring Check (Functioning Test) No Description Contact Condition Oil Temp # Contact ( ℃) Oil Temp # Contact ( ℃) Pressure Relief Device Contact Oil Level Gauge # Contact Oil Level Gauge # Contact Buchholz RELAY # Contact Buchholz RELAY # Contact Wind Temp # Contact ( ℃) Wind Temp # Contact ( ℃) Remark Page 20 of 24 Rev B 11.7 Auxiliary equipment check ◆ Rating : ◆ Serial No Transformer : ◆ Test equipment : ◆ Date Digital Multi-tester : Auxiliary Equipment Check No Description Oil Temp Indicator Winding Temp Indicator B-H Relay Operation Criteria Alarm / Trip Result Alarm / Trip Note : Auxiliary Equipment Check 1) Purpose To check all control circuit and relays if their functions are operated normally according to approved drawings 2) Performance Sequence test according to approved drawings 3) Acceptance criteria All the functions should be operated normally Page 21 of 24 Rev B 11.8 Appearance & dimension check ◆ Rating : ◆ Serial No Transformer : ◆ Test equipment : ◆ Date : Visual check No DESCRIPTION Anchoring & Fixing of Wheel Earthing Assembling Condition (Fitting Device, Cabling) Bushing Condition (HV/LV-N) Oil Level (Conservator) Silicagel of Breather / Compound Gauge Painting (Color/Rust) Marking, Diagram, Identification Plate Oil Leakage 10 Any Damaged Part 11 Quality of the materials and fabrication 12 Check of alignment, assembly, interwiring connection RESULT Page 22 of 24 Rev B 11.9 Polarity of BCT POS RATIO SYMBOL POLARITY CHECK Page 23 of 24 Rev B 11.10 NGR test RESISTANCE VALUE SPEC VALUE 11.11 TEST VALUE RESULT TEST VALUE RESULT Insulation of oil INSULATION OIL TEST SPEC VALUE 12.0 ATTACHMENTS Attachment 12.1 Protection & metering single line diagram for start-up auxiliary transformer Page 24 of 24 [Attachment 12.1] ... testing and commissioning of the following Start- up transformer (SAT) consist of the below table KKS Number BCT BCT01 BCT02 1.2 Description START- UP TRANSFORMER (SAT) NGR FOR SAT NGR FOR SAT Scope of... Description START- UP TRANSFORMER (SAT) NGR FOR SAT NGR FOR SAT 1.3 The Safety Knowledge in Operation 1.3.1 Before the start of any testing it should be confirmed that all power supplies to the... ATTACHMENTS .24 Attachment 12.1 Protection & metering single line diagram for start- up auxiliary transformer Page of 24 Rev B 1.0 GENERAL PURPOSE 1.1 Introduction & Commissioning Boundary