CN102565614B - Alternating voltage loop test method - Google Patents
Alternating voltage loop test method Download PDFInfo
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- CN102565614B CN102565614B CN201210007292.2A CN201210007292A CN102565614B CN 102565614 B CN102565614 B CN 102565614B CN 201210007292 A CN201210007292 A CN 201210007292A CN 102565614 B CN102565614 B CN 102565614B
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Abstract
Disclosed is an alternating voltage loop test method. Firstly, alternating current is led to each section of bus bars on one side and voltage mutual inductors on each section of bus bars; secondly, current is led to main transformers and the voltage mutual inductors on each side; and thirdly, current is led to each section of bus bars on other sides and the voltage mutual inductors on bus bars. The voltage mutual inductors generate secondarily alternating voltage after the voltage mutual inductors are electrified, the alternating voltage leads current to a terminal box of the voltage mutual inductors through a cable wiring loop, the terminal box leads current to alternating current voltage terminals of relay protection cabinets, telecontrol cabinets, measuring cabinets, metering cabinets and the like through cable wirings, a high resolution voltage measuring instrument is used for detecting voltage terminals of cabinet cases, and test data are obtained. The method has the advantages that primary equipment and wires which are in a missing or wrong connection state can be checked and found; check is complete; equipment and materials are simple and convenient and workload is light; and check is more effective and reliable.
Description
Technical field
The invention belongs to electrical technology field.Be used in particular for transformer station before operation, the alternating voltage of secondary screen cabinet terminal, under electriferous state, is detected in approximate simulation primary circuit, guarantees the method for circuit connection correctness.
Background technology
Electric power has become the necessity for life that people are indispensable, and transformer station is the important step that electric power is carried, and the correctness of its ac voltage circuit will have influence on the safety and stability of electrical network, electric power the normal life with people is normally provided.Except the misoperation that protective relaying device problem causes, most protection malfunctions are mainly that ac circuit goes wrong, and affect the correct operation of electric grid relay protection.Ac voltage circuit system is an important component part in grid power system, mainly comprises once part and secondary part.Once part comprises: bus, connection wire, disconnector, isolating switch, main-transformer, voltage transformer (VT).Secondary partly comprises: secondary windings of PT and binding post, the cable connection that terminal box, indoor secondary shield between cabinet and connection device and screen cabinet on the spot form.Before the charged operation of transformer station, be now adopt voltage transformer (VT) on the spot terminal box rise the method for inspection of secondary voltage, with reference to figure 2, after transformer station loop connects, off voltage mutual inductor side loop, use pressure regulator equipment, voltage transformer (VT) on the spot terminal box to screen cabinet side secondary circuit, add secondary voltage.In pulpit, with multimeter, measure screen cabinet voltage terminal voltage.This method can only check the voltage circuit that shields cabinet from terminal box to pulpit.From voltage transformer (VT), once to secondary, Secondary Winding coil, and can not check and obtain to terminal box loop from mutual inductor secondary connection post, exists and obviously checks dead angle.If have short circuit at voltage transformer (VT) binding post, once charged possibility will cause voltage transformer (VT) to burn.Once just occurred because the secondary connection post at voltage transformer (VT) has short circuit, when once charged, burnt out the accident of voltage transformer (VT).On the one hand, terminal box rises the method for secondary voltage in addition, and boost in loop one by one, and testing equipment is heavy, repeatedly carry, and workload is large, to field test, makes troubles.
Summary of the invention
Under such technical background, the problem existing for solving, the invention provides a kind of Neng Dui transformer station alternating voltage once, the connection of secondary circuit checks, find to leak, wrong primary equipment and wire and the wiring of secondary screen cabinet case connecting; More comprehensive to the inspection of alternating voltage secondary circuit; Simple and convenient, workload is few; The higher method of inspection of validity, reliability checking.
The present invention adopts following technical scheme to realize.
The present invention is characterised in that, before the charged operation of transformer station, simulate the side at main transformer, it is the charging test of an Accelerated Life voltage of medium-pressure or high pressure/low-pressure side, by operating isolation switch and isolating switch, make trial voltage charged according to following program: the first stage, alternating current is taken to each section of bus of this side, and the voltage transformer (VT) on each section of bus; Subordinate phase, charged to each main-transformer (referring to has more than two main transformers), and the voltage transformer (VT) of each side; Phase III, charged each section of bus to other side, and the voltage transformer (VT) on bus; After voltage transformer (VT) is charged, voltage transformer secondary produces alternating voltage, alternating voltage is charged to voltage transformer (VT) terminal box by cable connection loop, and terminal box is charged to screen cabinet alternating voltage terminals such as relay protection, telemechanical, measurement, meterings by cable connection; In each voltage transformer (VT) band electric process, utilize high-resolution voltage measuring instrument, with reference to figure 2, at measurement point 1, measurement point 2, detect, screen cabinet case voltage terminal is detected, obtain test figure, by numerical value, judge the correctness of ac voltage circuit wiring.
The present invention each electric pressure three windings or double winding transformer station, the method for an Accelerated Life voltage of employing, takes this side bus and voltage transformer (VT) to electricity, and electricity is taken to main-transformer and voltage transformer (VT) thereof, and electricity is taken to other side bus and voltage transformer (VT); At secondary screen cabinet case voltage terminal, detect voltage, with reference to figure 2, at measurement point 1, measurement point 2, detect.By voltage value, judge the correctness of ac voltage circuit.
The present invention compares with existing secondary booster test, and the method has following advantage:
(1) connection of Neng Dui transformer station alternating voltage primary circuit is checked, and finds the primary equipment and the wire that leak, mistake connects.
(2) more comprehensive to the inspection of alternating voltage secondary circuit.Secondary windings of PT, Secondary Winding binding post, secondary connection post is to the wiring of terminal box on the spot, and terminal box, to secondary screen cabinet terminal connections, all can check and obtain on the spot.
(3) this method device therefor material, simple and convenient, and workload is few.Once charged rear whole voltage secondary circuits all can, according to band electric process, detect voltage secondary circuit.Need with pressure regulator is repeated multiple times, to different secondary voltage circuits, not boost at secondary, reduce workload and test period.
(4) this method more approaches the state of transformer station's charging operation, and the no-load voltage ratio situation of ac voltage circuit is checked.The validity, the reliability that check are higher.If there is the false wiring problems such as second short circuit, can not cause device damage yet, find, after mistakes and omissions wiring, to have ample time and search and processing problem.
Below in conjunction with accompanying drawing 1, accompanying drawing 2 and embodiment, the present invention will be further described.
Accompanying drawing explanation
Fig. 1 is alternating voltage primary circuit wiring schematic diagram;
Fig. 2 is alternating voltage secondary circuit wiring schematic diagram.
Embodiment
Alternating voltage loop test method, the present invention is before the charged operation of transformer station, simulate the side at main transformer, it is the charging test of an Accelerated Life voltage of medium-pressure or high pressure/low-pressure side, by operating isolation switch and isolating switch, make trial voltage charged according to following program: the first stage, alternating current is taken to each section of bus of this side, and the voltage transformer (VT) on each section of bus; Subordinate phase, charged to each main-transformer, and the voltage transformer (VT) of each side; Phase III, charged each section of bus to other side, and the voltage transformer (VT) on bus; After voltage transformer (VT) is charged, voltage transformer secondary produces alternating voltage, alternating voltage is charged to voltage transformer (VT) terminal box by cable connection loop, and terminal box is charged to screen cabinet alternating voltage terminals such as relay protection, telemechanical, measurement, meterings by cable connection; In each voltage transformer (VT) band electric process, utilize high-resolution voltage measuring instrument, screen cabinet case voltage terminal is detected, obtain test figure.
The present invention each electric pressure three windings or double winding transformer station, the method for an Accelerated Life voltage of employing, takes this side bus and voltage transformer (VT) to electricity, and electricity is taken to main-transformer and voltage transformer (VT) thereof, and electricity is taken to other side bus and voltage transformer (VT); At secondary screen cabinet case voltage terminal, detect voltage, obtain voltage value.
It is example that embodiment be take the 220kV transformer station of three kinds of electric pressures, sets forth concrete implementation process.
See Fig. 1, by the 110kV of transformer station side once, add three-phase symmetrical positive phase sequence 380V trial voltage, operation isolation disconnecting link and isolating switch, make trial voltage charged according to following program: one, charged to 110kV bus and and voltage transformer (VT); Two, charged to main transformer and voltage transformer (VT) thereof; Three, charged to medium voltage side 220kV bus and mutual inductor thereof; Four, charged to low-pressure side 35kV bus and voltage transformer (VT) thereof; In band electric process, with reference to figure 2, synchronously at each screen cabinet case secondary voltage terminal test magnitude of voltage; By to detecting data analysis, can judge and draw voltage circuit correctness.
The condition possessing: substation project civil engineering all completes, electric once, the secondary installing work of debugging before charged operation completes, all outgoing line intervals line side isolation switch disconnects.Stand inner breaker, isolation switch disconnects.There is 380V three-phase test power supply.
The required major equipment material of testing has: one, the high accuracy number multimeter of measuring voltage, three 2 of line four line power leads, one of the three-phase air switch of control power supply.
1. test procedure
With reference to figure 1, dotted portion is test connection schematic diagram, and solid line is transforming plant primary wiring schematic diagram, and experiment power supply is 380V three-phase positive phase sequence power supply.
Step 1,110kV I section bus is charged
With reference to figure 1, the test air switch that closes, the female disconnector of the 110kV outgoing line interval I of closing, the female voltage transformer (VT) disconnector of the I of closing, the outgoing line interval isolating switch that closes, makes the female voltage transformer (VT) of 110kV I section bus and I charged, and each relevant screen cabinet is carried out to secondary voltage detection.After the data that record are normal, carry out next step operation.
Step 2,110kV II section bus is charged
With reference to figure 1, the female disconnector of the 110kV mother of closing interval I, the female disconnector of II, the female voltage transformer (VT) disconnector of the II of closing, the mother of closing interval isolating switch, make 110kV II section bus and II section bus-bar potential transformer charged, each relevant screen cabinet is carried out to secondary voltage detection.After the data that record are normal, carry out next step operation.
Step 3, main transformer is charged
With reference to figure 1, the main transformer 110kV side of closing interval disconnector, the main transformer 110kV side of closing interval I section bus isolating switch, the main transformer 110kV side of closing interval isolating switch, make 220kV main transformer charged, main transformer 110kV side voltage transformer (VT), 220kV side voltage transformer (VT) mutual inductor are charged, carry out secondary data detection, after the data that record are normal, carry out next step operation.
Step 4,220kV I section bus is charged
With reference to figure 1, the main transformer 220kV side of closing interval disconnector, the female disconnector of the main transformer 220kV side of closing interval I, the female voltage transformer (VT) disconnector of the main transformer 220kV I of closing, the main transformer 220kV side of closing interval isolating switch, make the female voltage transformer (VT) of 220kV I section bus and I charged, each relevant screen cabinet is carried out to secondary voltage detection.After the data that record are normal, carry out next step operation.
Step 5,220kV II section bus is charged
With reference to figure 1, the female disconnector of the 220kV mother of closing interval I, the female disconnector of II, the female voltage transformer (VT) disconnector of the II of closing, the 220kV mother of closing interval isolating switch, make 220kV II section bus and II section bus-bar potential transformer charged, each relevant screen cabinet is carried out to secondary voltage detection.After the data that record are normal, carry out next step operation.
Step 6,35kV bus is charged
With reference to figure 1,35 kV Side of Main Transformer interval disconnector closes, 35 kV Side of Main Transformer interval bus isolating switch closes, the 35kV I of closing section bus-bar potential transformer disconnector, 35 kV Side of Main Transformer interval isolating switch closes, make 35kV I section bus and bus-bar potential transformer charged, each relevant screen cabinet is carried out to secondary voltage detection.The data that record are normal.
2. the determination methods of testing result
The voltage data detecting is analyzed to judgement.Record A, B, C three-phase voltage numerical value is basic identical, AB, BC, CA line magnitude of voltage are basic identical, can judge that loop is normal.If it is larger the voltage phase difference of A, B, C to be detected, those phase connection existing problems that differ greatly.
Secondary voltage terminal to screen cabinets such as public observing and controlling, relay protection, failure wave-recordings is measured, and the test figure that measures homophase should equate, if record magnitude of voltage, is zero or abnormal, can judge that this circuit connection has problem.
3. other modes that this method of inspection is applied
The 220kV side of this method Ye Ke 220kV transformer station is added to electricity according to above-mentioned step mode each section of bus and the bus-bar potential transformer of this side, electricity is taken to main-transformer and voltage transformer (VT) thereof, electricity is taken to each section of bus of 110kV and voltage transformer (VT) thereof, electricity is taken to each section of bus of 35kV and voltage transformer (VT) thereof.With multimeter, detect secondary screen cabinet terminal voltage.
Also can be at 35kV side Accelerated Life voltage, according to above-mentioned step mode, electricity is added to each section of bus and the bus-bar potential transformer of this side, electricity is taken to main-transformer and voltage transformer (VT) thereof, electricity is taken to each section of bus of 110kV and voltage transformer (VT) thereof, electricity is taken to each section of bus of 220kV and voltage transformer (VT) thereof.With multimeter, detect secondary screen cabinet terminal voltage.
4. the applicable scope of this test method
To each electric pressures such as 500kV, 110kV, 35kV, 10kV, two windings or three-winding transformer station, can adopt equally similar approach to test, at an Accelerated Life voltage, electricity is taken to bus and voltage transformer (VT), electricity is taken to main-transformer, electricity is taken to other side bus and voltage transformer (VT), at secondary screen cabinet case, detect, with reference to figure 2, at measurement point 1, measurement point 2, detect.By magnitude of voltage, judge the correctness of ac voltage circuit.
Claims (2)
1. alternating voltage loop test method, it is characterized in that: before the charged operation of San winding transformer station, simulate the side at main transformer, it is the charging test that medium voltage side primary circuit applies trial voltage, by operation primary circuit disconnector and isolating switch, make trial voltage charged according to following program: the first stage, test air switch closes, bus bar side disconnector and the isolating switch of medium voltage side outgoing line interval close, and the disconnector of the voltage transformer (VT) of medium voltage side bus, alternating current is taken to medium voltage side bus, and the voltage transformer (VT) on medium voltage side bus; Subordinate phase, close main transformer medium voltage side disconnector and isolating switch, take main transformer to alternating current, and the voltage transformer (VT) of main transformer medium voltage side and the on high-tension side voltage transformer (VT) of main transformer; Phase III, the on high-tension side disconnector of the main transformer that closes and isolating switch, and the disconnector of high-voltage side bus voltage transformer (VT), alternating current is taken to on high-tension side bus and voltage transformer (VT) thereof, disconnector and the isolating switch of the main transformer low-pressure side of closing, and the disconnector of low-pressure side bus voltage transformer (VT), alternating current is taken to bus and the voltage transformer (VT) thereof of low-pressure side; After the voltage transformer (VT) in each stage is charged, voltage transformer secondary produces alternating voltage, alternating voltage is by the charged terminal box to voltage transformer (VT) in cable connection loop, and the terminal box of voltage transformer (VT) is charged to relay protection, telemechanical, measurement, measuring screen cabinet alternating voltage terminal by cable connection; In each voltage transformer (VT) band electric process, utilize high-resolution voltage measuring instrument, screen cabinet alternating voltage terminal is detected, obtain test figure.
2. alternating voltage loop test method according to claim 1, it is characterized in that: each electric pressure three winding transformer stations, adopt medium voltage side primary circuit to apply trial voltage, electricity is taken to medium voltage side bus and voltage transformer (VT) thereof, electricity is taken to main-transformer and voltage transformer (VT) thereof, electricity is taken to high-voltage side bus and voltage transformer (VT) and low-pressure side bus and voltage transformer (VT) thereof; At screen cabinet alternating voltage terminal test voltage, obtain voltage value.
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| CN201210007292.2A CN102565614B (en) | 2012-01-11 | 2012-01-11 | Alternating voltage loop test method |
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| CN201210007292.2A CN102565614B (en) | 2012-01-11 | 2012-01-11 | Alternating voltage loop test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105445609A (en) * | 2015-12-01 | 2016-03-30 | 国网河南宜阳县供电公司 | Testing device and method for high voltage supply system loop |
| CN106324329B (en) * | 2016-10-25 | 2023-09-22 | 云南电网有限责任公司电力科学研究院 | Overvoltage self-adaptive identification method and system based on D-dot principle |
| CN113156276B (en) * | 2021-02-22 | 2024-03-29 | 云南建投第二安装工程公司 | Method for checking and debugging secondary voltage loop of bus alternating-current withstand voltage test of switching equipment |
| CN114089120A (en) * | 2021-11-25 | 2022-02-25 | 国网陕西省电力公司西咸新区供电公司 | Intelligent substation secondary voltage loop fault diagnosis positioning device and method |
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| CN201177641Y (en) * | 2008-04-18 | 2009-01-07 | 江苏省电力公司镇江供电公司 | Secondary circuit wiring checking system |
| CN101769980A (en) * | 2008-12-31 | 2010-07-07 | 新疆维吾尔自治区送变电工程公司 | Testing method simulating power transmission debugging |
| CN101881813A (en) * | 2010-06-17 | 2010-11-10 | 国网电力科学研究院 | Method for simulating GIS transformer substation to produce very fast transient overvoltage (VFTO) and test circuit |
| EP2251702A1 (en) * | 2009-05-05 | 2010-11-17 | SMA Solar Technology AG | Cabling test device |
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- 2012-01-11 CN CN201210007292.2A patent/CN102565614B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201177641Y (en) * | 2008-04-18 | 2009-01-07 | 江苏省电力公司镇江供电公司 | Secondary circuit wiring checking system |
| CN101769980A (en) * | 2008-12-31 | 2010-07-07 | 新疆维吾尔自治区送变电工程公司 | Testing method simulating power transmission debugging |
| EP2251702A1 (en) * | 2009-05-05 | 2010-11-17 | SMA Solar Technology AG | Cabling test device |
| CN101881813A (en) * | 2010-06-17 | 2010-11-10 | 国网电力科学研究院 | Method for simulating GIS transformer substation to produce very fast transient overvoltage (VFTO) and test circuit |
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