CN106569075A - Main transformer and high voltage side cable zero-sequence differential protection polarity test circuit and method - Google Patents
Main transformer and high voltage side cable zero-sequence differential protection polarity test circuit and method Download PDFInfo
- Publication number
- CN106569075A CN106569075A CN201510649753.XA CN201510649753A CN106569075A CN 106569075 A CN106569075 A CN 106569075A CN 201510649753 A CN201510649753 A CN 201510649753A CN 106569075 A CN106569075 A CN 106569075A
- Authority
- CN
- China
- Prior art keywords
- main transformer
- zero sequence
- differential protection
- pressure side
- switch blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a main transformer and high voltage side cable zero-sequence differential protection polarity test circuit and method. According to the test circuit, a maintenance power supply is connected when a main transformer and a high voltage side bus are in the stop state, a single-phase voltage regulator is regulated and current is outputted to the appropriate value so that a current loop composed of the maintenance power supply-single-phase voltage regulator TT-isolation transformer TI-ammeter-main transformer high voltage side Y-shaped three-phase windings-main transformer high voltage side cable-main transformer high voltage side line knife Q9-GIS circuit breaker Q0-primary female knife Q1 (or secondary female knife Q2)-primary female grounding knife QG1 (or secondary female grounding knife)-grounding network-ground is formed. The current flows through the primary side of the first zero-sequence current mutual inductor ZCT1 and the second zero-sequence current mutual inductor ZCT2 of a zero-sequence differential protection device 87GMC so that simulation of zero-sequence current of the primary system in case of external grounding fault can be realized, and the polarity of the main transformer and the high voltage side cable zero-sequence differential protection device can be tested and inspected by the loop current.
Description
Technical field
The present invention relates to a kind of main transformer and high-pressure side cable zero sequence differential protection polarity hookup and test method, and the situation suitable for main transformer and high-pressure side cable zero sequence differential protection both sides ZCT mounting distance farther out.
Background technology
Main transformer and high-pressure side cable zero sequence differential protection 87GMC; there is main protection during earth fault as main transformer high-pressure side Y shape winding and high-pressure side cable; especially for main transformer neutral point grounded system via resistance; the characteristics of with reaction ground-fault sensitivity height, quick action; protection action in 0 second is in unit full cut-off, i.e. tripping main transformer high-pressure side GIS choppers, the total low pressure side switch of factory, generator field switch, closing steam turbine main inlet throttle-stop valve.Main transformer and high-pressure side cable zero sequence differential protection have two types; first type is guiding line style zero sequence differential protection; referring to Fig. 1 left-hand components, differential protection 87GMC is by being installed on the first zero sequence current mutual inductor ZCT1 and secondary side cable of main transformer neutral point, be installed on main transformer high-pressure side cable end piece GIS choppers（Sulfur hexafluoride breaker）Interior the second zero sequence current mutual inductor ZCT2 and secondary side cable are constituted with differential protection relay etc. of the Power Plant Side near electromotor G is installed on.Another type is optical differential type zero sequence differential protection, referring to Fig. 2 left-hand components, differential protection 87GMC is made up of two differential protections, two differential protections are connected by optical fiber and are communicated, first differential protection is by the first zero sequence current mutual inductor ZCT1 and secondary side cable for being installed on main transformer neutral point, the differential protection relay etc. that Power Plant Side is installed near electromotor G is constituted, second differential protection is by the second zero sequence current mutual inductor ZCT2 and secondary side cable being installed in the cable end piece GIS choppers of main transformer high-pressure side, it is installed on the composition such as differential protection relay of transformer substation side.
The characteristics of main transformer and high-pressure side cable zero sequence differential protection 87GMC is that main transformer high-pressure side Y shape winding and the zero-sequence current in the cable of high-pressure side are flow through in detection, and distance is relatively far away between the first zero sequence current mutual inductor ZCT1 and the second zero sequence current mutual inductor ZCT2.The polarity correctness of main transformer and high-pressure side cable zero sequence differential protection 87GMC, directly influences the correctness of protection act.And zero sequence differential protection polarity test; it is a problem for making us perplexing; when normally being run due to electromotor G- main transformer MTR units; by only forward-order current in protection equipment (main transformer and high-pressure side cable) primary circuit; there is no zero-sequence current, thus the correctness of zero sequence differential protection polarity cannot be checked with load current.However, if do not carried out main transformer and high-pressure side cable zero sequence differential protection polarity test, often resulting in the accident of the misoperation chaser when external system occurs earth fault due to zero sequence differential protection incorrect polarity, economic loss is caused.
The content of the invention
It is an object of the invention to provide a kind of main transformer and high-pressure side cable zero sequence differential protection polarity hookup and method; the hookup and method can accurately, easily carry out main transformer and high-pressure side cable zero sequence differential protection polarity test; guarantee the correctness of zero sequence differential protection polarity, the problem of zero sequence differential protection refused action occurs during earth fault in zero sequence differential protection misoperation when preventing the external earth fault in area, area.
In order to realize above-mentioned technical purpose, the present invention is adopted the following technical scheme that：
A kind of main transformer and high-pressure side cable zero sequence differential protection polarity hookup; the main transformer and high-pressure side cable zero sequence differential protection 87GMC are installed on the Y shape winding neutral lead of main transformer high-pressure side by the first zero sequence current mutual inductor ZCT1; second zero sequence current mutual inductor ZCT2 is installed in the cable end piece GIS choppers of main transformer high-pressure side, and main transformer MTR high-pressure sides are Jing after high tension cable series transformer circuit plug-in strip Q9 and GIS circuit breaker Q 0 and meet positive pole plug-in strip Q1 with secondary mother plug-in strip Q2；Main transformer high-pressure side Y shape winding neutral lead series connection main transformer neutral point earthing switch blade QN and resistance R is followed by grounded screen lead-out wire；
The hookup also includes maintenance power supply, single-phase voltage regulator TT, isolating transformer TI, ammeter, positive pole earthing switch blade QG1, secondary mother's earthing switch blade；
The maintenance plant-grid connection single-phase voltage regulator TT inputs, single-phase voltage regulator TT outfans are connected to isolating transformer TI inputs, isolating transformer TI exports one end concatenation ammeter and is followed by main transformer neutral point earthing switch blade QN front ends, the first zero sequence current mutual inductor ZCT1 rear ends, and isolating transformer TI outputs are another to be terminated at grounded screen lead-out wire；
The positive pole plug-in strip Q1 other end external cables are followed by positive pole earthing switch blade QG1 one end, positive pole earthing switch blade QG1 is another to be terminated at grounded screen lead-out wire, secondary mother's plug-in strip Q2 other end external cables are followed by secondary mother's earthing switch blade, and secondary female earthing switch blade is another is terminated at grounded screen lead-out wire.
A kind of main transformer and high-pressure side cable zero sequence differential protection polarity test method; stop under labour state in main transformer and high-voltage side bus; plant-grid connection single-phase voltage regulator TT inputs will be overhauled; single-phase voltage regulator TT outfans are connected to isolating transformer TI inputs; isolating transformer TI exports one end concatenation ammeter and is followed by main transformer neutral point earthing switch blade QN front ends, the first zero sequence current mutual inductor ZCT1 rear ends, and isolating transformer TI outputs are another to be terminated at grounded screen lead-out wire；The ends of positive pole earthing switch blade QG1 mono- are connected to the cable that positive pole plug-in strip Q1 is connected to, and positive pole earthing switch blade QG1 is another to be terminated at grounded screen lead-out wire, and secondary mother's earthing switch blade one end is connected to the cable that pair mother plug-in strip Q2 is connected to, and earthing switch blade is another is terminated at grounded screen lead-out wire for pair mother；
Close main transformer circuit plug-in strip Q9, GIS circuit breaker Q 0, positive pole plug-in strip Q1（Or secondary mother plug-in strip Q2）, positive pole earthing switch blade QG1（Or secondary mother's earthing switch blade）, main transformer neutral point earthing switch blade QN remains off；
Connect maintenance power supply, adjustment single-phase voltage regulator TT, appropriate value is outputed current to, is then formed by maintenance power supply-single-phase voltage regulator TT- isolating transformers TI- ammeters-main transformer high-pressure side Y shape three-phase windings-main transformer high-pressure side cable-main transformer high-pressure side circuit plug-in strip Q9-GIS circuit breaker Q 0- positive pole plug-in strip Q1（Or secondary mother plug-in strip Q2)-positive pole earthing switch blade QG1（Or secondary mother's earthing switch blade）The current loop that-grounded screen-the earth is constituted; the electric current has flow through the primary side of the first zero sequence current mutual inductor ZCT1 and the second zero sequence current mutual inductor ZCT2 of zero sequence differential protection 87GMC; the simulation of zero-sequence current when realizing primary system external earth-fault, tests and checks the polarity of main transformer and high-pressure side cable zero sequence differential protection 87GMC using the loop current；
After hookup is passed through electric current：The first zero sequence current mutual inductor ZCT1 of detection zero sequence differential protection 87GMC and the phase place of the second zero sequence current mutual inductor ZCT2 secondary side input currents; with the protection device 87GMC polar end as reference polarity; if both about 180 ° of phases; then main transformer and high-pressure side cable zero sequence differential protection 87GMC polarity are correct; if both about 0 ° of phase, main transformer and high-pressure side cable zero sequence differential protection 87GMC reverse polarity connections.
Further, the phase place of the first zero sequence current mutual inductor ZCT1 and the second zero sequence current mutual inductor ZCT2 secondary side input currents is detected from zero sequence differential protection 87GMC binding posts with embedding shape current phase table.
Further, from zero sequence differential protection 87GMC inside the first zero sequence current mutual inductor ZCT1 of detection and the phase place of the second zero sequence current mutual inductor ZCT2 secondary side input currents.
Main transformer of the present invention and high-pressure side cable zero sequence differential protection polarity hookup and method are compared with prior art; the present invention can accurately, easily carry out main transformer and high-pressure side cable zero sequence differential protection polarity test; guarantee the correctness of zero sequence differential protection polarity, the problem of zero sequence differential protection refused action occurs during earth fault in zero sequence differential protection misoperation when preventing the external earth fault in area, area.
Description of the drawings
Fig. 1 is main transformer of the present invention and high-pressure side cable zero sequence differential protection polarity hookup schematic diagram（Guiding line style zero sequence differential protection）；
Fig. 2 is main transformer of the present invention and high-pressure side cable zero sequence differential protection polarity hookup schematic diagram（Optical differential type zero sequence differential protection）.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described with specific embodiment.
Referring to Fig. 1 and Fig. 2; a kind of main transformer and high-pressure side cable zero sequence differential protection polarity hookup; the main transformer and high-pressure side cable zero sequence differential protection 87GMC are installed on the Y shape winding neutral lead of main transformer high-pressure side by the first zero sequence current mutual inductor ZCT1, and the second zero sequence current mutual inductor ZCT2 is installed in main transformer high-pressure side cable end piece GIS circuit breaker Q 0.Main transformer and high-pressure side cable zero sequence differential protection 87GMC, reaction flows through main transformer high-pressure side Y shape winding and high-pressure side cable zero-sequence current and action.Main transformer MTR high-pressure sides are Jing after high tension cable series transformer circuit plug-in strip Q9 and GIS circuit breaker Q 0 and meet positive pole plug-in strip Q1 with secondary mother plug-in strip Q2；Main transformer high-pressure side Y shape winding neutral lead series connection main transformer neutral point earthing switch blade QN and resistance R is followed by grounded screen lead-out wire.
The hookup also includes maintenance power supply, single-phase voltage regulator TT, isolating transformer TI, ammeter, positive pole earthing switch blade QG1, secondary mother's earthing switch blade, the maintenance power supply（Alternating current 220V or 380V）Access single-phase voltage regulator TT inputs, single-phase voltage regulator TT outfans are connected to isolating transformer TI inputs, isolating transformer TI exports one end concatenation ammeter and is followed by main transformer neutral point earthing switch blade QN front ends, the first zero sequence current mutual inductor ZCT1 rear ends, and isolating transformer TI outputs are another to be terminated at grounded screen lead-out wire.Using pressure regulator, make loop current adjustable, using isolating transformer, experiment power supply is isolated with primary system, the correctness of main transformer and high-pressure side cable zero sequence differential protection polarity is tested and checked using the loop current.
The positive pole plug-in strip Q1 other end external cables are followed by positive pole earthing switch blade QG1 one end, positive pole earthing switch blade QG1 is another to be terminated at grounded screen lead-out wire, secondary mother's plug-in strip Q2 other end external cables are followed by secondary mother's earthing switch blade, and secondary female earthing switch blade is another is terminated at grounded screen lead-out wire.
The present invention hookup ultimate principle be:In the case where main transformer and high-voltage side bus (positive pole is secondary female) stop labour state, from one electric current of injection between main transformer high-pressure side Y shape winding neutral ground plug-in strip QN front ends and grounded screen lead-out wire, allow the electric current to flow through the primary circuit of the second zero sequence current mutual inductor ZCT2 in from the first zero sequence current mutual inductor ZCT1 at main transformer MTR neutral points to high-pressure side cable end piece GIS choppers, then test loop is constituted through main transformer high-voltage side bus three-phase ground plug-in strip, grounded screen, the earth.If the electric current for flowing through the first zero sequence current mutual inductor ZCT1 at main transformer neutral point is I0 , because main transformer is identical with the zero sequence impedance three-phase of high-pressure side cable, then the electric current stream enters after main transformer high-pressure side Y shape winding and high-pressure side cable, becomes that three-phase is equal in magnitude, phase place identical electric current, is I per phase current size0/ 3, then through main transformer high-pressure side circuit plug-in strip Q9, GIS circuit breaker Q 0, positive pole plug-in strip Q1 (or secondary mother plug-in strip Q2), positive pole earthing switch blade QG1（Or secondary mother's earthing switch blade）Afterwards, with I0The earth is flowed into, zero-sequence current path is material is thus formed, has truly simulated situation when main transformer and the external earth fault in high-pressure side cable area.Because main transformer employs the mode of connection of Y/ Δs -11, when Y sides winding flows through zero-sequence current, Δ side winding zero-sequence current then forms loop, may not flow into electromotor G windings.The present invention can exactly test and analyze the correctness of main transformer and high-pressure side cable zero sequence differential protection polarity using the test loop electric current, with guarantee main transformer and high-pressure side cable run in the external earth fault in zero sequence differential protection action message during earth fault in generating region, generating region when zero sequence differential protection be reliably failure to actuate.
A kind of main transformer and high-pressure side cable zero sequence differential protection polarity test method, are based on main transformer and high-pressure side cable zero sequence differential protection polarity hookup.
Main transformer 110KV positive poles (or secondary female) are vacated first for this test.Plant-grid connection single-phase voltage regulator TT inputs will be overhauled, single-phase voltage regulator TT outfans are connected to isolating transformer TI inputs, isolating transformer TI exports one end concatenation ammeter and is followed by main transformer neutral point earthing switch blade QN front ends, the first zero sequence current mutual inductor ZCT1 rear ends, and isolating transformer TI outputs are another to be terminated at grounded screen lead-out wire.The ends of positive pole earthing switch blade QG1 mono- are connected to the cable that positive pole plug-in strip Q1 is connected to, and positive pole earthing switch blade QG1 is another to be terminated at grounded screen lead-out wire, and secondary mother's earthing switch blade one end is connected to the cable that pair mother plug-in strip Q2 is connected to, and earthing switch blade is another is terminated at grounded screen lead-out wire for pair mother.
Then, close main transformer circuit plug-in strip Q9, GIS circuit breaker Q 0, positive pole plug-in strip Q1（Or secondary mother plug-in strip Q2）, positive pole earthing switch blade QG1（Or secondary mother's earthing switch blade（Not shown in figure））, main transformer neutral point earthing switch blade QN remains off.
Connect alternating current 220V or 380V maintenance power supplys; adjustment single-phase voltage regulator TT; output current to appropriate numerical value; embedding shape current phase table detection is required or zero sequence differential protection 87GMC detections are required to meet the first zero sequence current mutual inductor ZCT1 and the second zero sequence current mutual inductor ZCT2 secondary side currents, then formed by maintenance power supply-single-phase voltage regulator TT- isolating transformers TI- ammeters-main transformer high-pressure side Y shape three-phase windings-main transformer high-pressure side cable-main transformer high-pressure side circuit plug-in strip Q9-GIS circuit breaker Q 0-positive pole plug-in strip Q1（Or secondary mother plug-in strip Q2)-positive pole earthing switch blade QG1（Or secondary mother's earthing switch blade）The current loop that-grounded screen-the earth is constituted; the electric current has flow through the primary side of the first zero sequence current mutual inductor ZCT1 and the second zero sequence current mutual inductor ZCT2 of zero sequence differential protection 87GMC; the simulation of zero-sequence current when realizing primary system external earth-fault, tests and checks the polarity of main transformer and high-pressure side cable zero sequence differential protection 87GMC using the loop current.
After hookup is passed through electric current：（1）For guiding line style zero sequence differential protection; referring to Fig. 1; the phase place of the first zero sequence current mutual inductor ZCT1 and the second zero sequence current mutual inductor ZCT2 secondary side input currents is detected from zero sequence differential protection 87GMC binding posts with embedding shape current phase table; with the protection device 87GMC polar end (band * ends in figure) as reference polarity; if both about 180 ° of phases, main transformer and high-pressure side cable zero sequence differential protection 87GMC polarity are correct；If both about 0 ° of phase, main transformer and high-pressure side cable zero sequence differential protection 87GMC reverse polarity connections.（2）For optical differential type zero sequence differential protection; referring to Fig. 2; from zero sequence differential protection 87GMC inside the first zero sequence current mutual inductor ZCT1 of detection and the phase place of the second zero sequence current mutual inductor ZCT2 secondary side input currents; check difference current, the size of stalling current; if about 180 ° of the phase of both input currents, difference current are zero; stalling current is not zero (its numerical value can be calculated by protection device stalling current formula), then main transformer and high-pressure side cable zero sequence differential protection 87GMC polarity are correct；Conversely, if about 0 ° of the phase of both input currents, stalling current are zero, difference current is not zero (its numerical value can be calculated by protection device difference current formula), then main transformer and high-pressure side cable zero sequence differential protection reverse polarity connection.After judging main transformer and high-pressure side cable zero sequence differential protection reverse polarity connection, side zero sequence current mutual inductor ZCT circuit connections should be changed.
Embodiment
Certain factory's import 350MW transformer unit system; it is mounted with optical differential type main transformer and high-pressure side cable zero sequence differential protection; when carrying out main transformer and high-pressure side cable zero sequence differential protection polarity test by the hookup and test method of the present invention; referring to Fig. 2; 40A electric currents are injected from main transformer neutral point earthing switch blade QN front ends, data measured is shown in Table 1 from protection device 87GMC inside：
Table 1
Test method of the invention; the test data of above-mentioned table 1 is analyzed, can determine whether out that main transformer and high-pressure side cable zero sequence differential protection 87GMC polarity are mistake, after change side zero sequence current mutual inductor ZCT circuit connections; tested again, measurement data is shown in Table 2：
Table 2
Test method of the invention, is analyzed to the test data of above-mentioned table 2, can determine whether out that main transformer and high-pressure side cable zero sequence differential protection 87GMC polarity are correct.
Embodiment should be noted that when testing：1. the size of injection current, should determine according to the no-load voltage ratio of protection zero sequence current mutual inductor ZCT in testing, and meet the requirement of test instrumentation and protection device measuring accuracy.2. the capacity of testing equipment; depending on should be according to the size of primary circuit zero sequence impedance during test and injection current; due to main transformer neutral point resistance grounded; the no-load voltage ratio of zero sequence current mutual inductor ZCT meets by general capacity test equipment (single-phase voltage regulator, isolating transformer) and requires much smaller than phase fault protection CT no-load voltage ratios.
Presently preferred embodiments of the present invention is these are only, protection scope of the present invention is not intended to limit, therefore, all any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc. should be included within the scope of the present invention.
Claims (4)
1. a kind of main transformer and high-pressure side cable zero sequence differential protection polarity hookup; the main transformer and high-pressure side cable zero sequence differential protection 87GMC are installed on the Y shape winding neutral lead of main transformer high-pressure side by the first zero sequence current mutual inductor ZCT1; second zero sequence current mutual inductor ZCT2 is installed in the cable end piece GIS choppers of main transformer high-pressure side, and main transformer MTR high-pressure sides are Jing after high tension cable series transformer circuit plug-in strip Q9 and GIS circuit breaker Q 0 and meet positive pole plug-in strip Q1 with secondary mother plug-in strip Q2；Main transformer high-pressure side Y shape winding neutral lead series connection main transformer neutral point earthing switch blade QN and resistance R is followed by grounded screen lead-out wire；
It is characterized in that：The hookup also includes maintenance power supply, single-phase voltage regulator TT, isolating transformer TI, ammeter, positive pole earthing switch blade QG1, secondary mother's earthing switch blade；
The maintenance plant-grid connection single-phase voltage regulator TT inputs, single-phase voltage regulator TT outfans are connected to isolating transformer TI inputs, isolating transformer TI exports one end concatenation ammeter and is followed by main transformer neutral point earthing switch blade QN front ends, the first zero sequence current mutual inductor ZCT1 rear ends, and isolating transformer TI outputs are another to be terminated at grounded screen lead-out wire；
The positive pole plug-in strip Q1 other end external cables are followed by positive pole earthing switch blade QG1 one end, positive pole earthing switch blade QG1 is another to be terminated at grounded screen lead-out wire, secondary mother's plug-in strip Q2 other end external cables are followed by secondary mother's earthing switch blade, and secondary female earthing switch blade is another is terminated at grounded screen lead-out wire.
2. a kind of main transformer and high-pressure side cable zero sequence differential protection polarity test method, is characterized in that：
Stop under labour state in main transformer and high-voltage side bus, plant-grid connection single-phase voltage regulator TT inputs will be overhauled, single-phase voltage regulator TT outfans are connected to isolating transformer TI inputs, isolating transformer TI exports one end concatenation ammeter and is followed by main transformer neutral point earthing switch blade QN front ends, the first zero sequence current mutual inductor ZCT1 rear ends, and isolating transformer TI outputs are another to be terminated at grounded screen lead-out wire；The ends of positive pole earthing switch blade QG1 mono- are connected to the cable that positive pole plug-in strip Q1 is connected to, and positive pole earthing switch blade QG1 is another to be terminated at grounded screen lead-out wire, and secondary mother's earthing switch blade one end is connected to the cable that pair mother plug-in strip Q2 is connected to, and earthing switch blade is another is terminated at grounded screen lead-out wire for pair mother；
Close main transformer circuit plug-in strip Q9, GIS circuit breaker Q 0, positive pole plug-in strip Q1（Or secondary mother plug-in strip Q2）, positive pole earthing switch blade QG1（Or secondary mother's earthing switch blade）, main transformer neutral point earthing switch blade QN remains off；
Connect maintenance power supply, adjustment single-phase voltage regulator TT, appropriate value is outputed current to, is then formed by maintenance power supply-single-phase voltage regulator TT- isolating transformers TI- ammeters-main transformer high-pressure side Y shape three-phase windings-main transformer high-pressure side cable-main transformer high-pressure side circuit plug-in strip Q9-GIS circuit breaker Q 0- positive pole plug-in strip Q1（Or secondary mother plug-in strip Q2)-positive pole earthing switch blade QG1（Or secondary mother's earthing switch blade）The current loop that-grounded screen-the earth is constituted; the electric current has flow through the primary side of the first zero sequence current mutual inductor ZCT1 and the second zero sequence current mutual inductor ZCT2 of zero sequence differential protection 87GMC; the simulation of zero-sequence current when realizing primary system external earth-fault, tests and checks the polarity of main transformer and high-pressure side cable zero sequence differential protection 87GMC using the loop current；
After hookup is passed through electric current：The first zero sequence current mutual inductor ZCT1 of detection zero sequence differential protection 87GMC and the phase place of the second zero sequence current mutual inductor ZCT2 secondary side input currents; with the protection device 87GMC polar end as reference polarity; if both about 180 ° of phases; then main transformer and high-pressure side cable zero sequence differential protection 87GMC polarity are correct; if both about 0 ° of phase, main transformer and high-pressure side cable zero sequence differential protection 87GMC reverse polarity connections.
3. main transformer according to claim 2 and high-pressure side cable zero sequence differential protection polarity test method, is characterized in that：The phase place of the first zero sequence current mutual inductor ZCT1 and the second zero sequence current mutual inductor ZCT2 secondary side input currents is detected from zero sequence differential protection 87GMC binding posts with embedding shape current phase table.
4. main transformer according to claim 2 and high-pressure side cable zero sequence differential protection polarity test method, is characterized in that：From zero sequence differential protection 87GMC inside the first zero sequence current mutual inductor ZCT1 of detection and the phase place of the second zero sequence current mutual inductor ZCT2 secondary side input currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510649753.XA CN106569075B (en) | 2015-10-10 | 2015-10-10 | Main transformer and high-pressure side cable zero sequence differential protection polarity hookup and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510649753.XA CN106569075B (en) | 2015-10-10 | 2015-10-10 | Main transformer and high-pressure side cable zero sequence differential protection polarity hookup and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106569075A true CN106569075A (en) | 2017-04-19 |
| CN106569075B CN106569075B (en) | 2019-02-05 |
Family
ID=58507701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510649753.XA Active CN106569075B (en) | 2015-10-10 | 2015-10-10 | Main transformer and high-pressure side cable zero sequence differential protection polarity hookup and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106569075B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199349A (en) * | 2018-01-02 | 2018-06-22 | 中国电力科学研究院有限公司 | A kind of series transformer valve side winding inter-turn zero sequence differential protecting method and device |
| CN108287286A (en) * | 2018-01-16 | 2018-07-17 | 济南置真电气有限公司 | A kind of polarity check method based on singlephase earth fault recorder data |
| CN109283421A (en) * | 2018-10-16 | 2019-01-29 | 中铁电气化（武汉）设计研究院有限公司 | A kind of rail traction substation low-voltage is powered detection test method and device |
| CN109444644A (en) * | 2018-12-21 | 2019-03-08 | 南京国电南自电网自动化有限公司 | Based on the differential wire selection method for power distribution network single phase earthing failure of transient |
| CN109856584A (en) * | 2018-11-13 | 2019-06-07 | 国网甘肃省电力公司电力科学研究院 | A kind of through-flow test method of 750kV converter station phase modifier system |
| CN110850205A (en) * | 2019-11-12 | 2020-02-28 | 中车长春轨道客车股份有限公司 | Auxiliary device for differential flow monitoring test of motor train unit |
| CN111257798A (en) * | 2020-01-16 | 2020-06-09 | 江苏广识电气有限公司 | Method for detecting polarity of zero-sequence current of line selection and automatically correcting |
| CN111416430A (en) * | 2020-05-19 | 2020-07-14 | 中国电建集团福建省电力勘测设计院有限公司 | Multi-station-in-one engineering off-station power fusion wiring method |
| CN113030620A (en) * | 2021-03-16 | 2021-06-25 | 马鞍山钢铁股份有限公司 | Transformer differential protection phasor test system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587157A (en) * | 2009-06-26 | 2009-11-25 | 河南省电力公司商丘供电公司 | Bus differential protection polarity test method |
| CN101614798A (en) * | 2009-07-22 | 2009-12-30 | 天津市电力公司 | Polarity detection system of electronic transformer |
| CN101907670A (en) * | 2010-06-25 | 2010-12-08 | 江苏省电力公司泗洪县供电公司 | Method for verifying correctness of transformer differential protection secondary connection loop |
| CN203204109U (en) * | 2013-04-24 | 2013-09-18 | 中铁电气化局集团有限公司 | Differential protection field calibration device of transformer |
| JP2014036499A (en) * | 2012-08-08 | 2014-02-24 | Kanto Electrical Safety Inspection Association | High voltage insulation monitoring device, and high voltage insulation monitoring method |
-
2015
- 2015-10-10 CN CN201510649753.XA patent/CN106569075B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587157A (en) * | 2009-06-26 | 2009-11-25 | 河南省电力公司商丘供电公司 | Bus differential protection polarity test method |
| CN101614798A (en) * | 2009-07-22 | 2009-12-30 | 天津市电力公司 | Polarity detection system of electronic transformer |
| CN101907670A (en) * | 2010-06-25 | 2010-12-08 | 江苏省电力公司泗洪县供电公司 | Method for verifying correctness of transformer differential protection secondary connection loop |
| JP2014036499A (en) * | 2012-08-08 | 2014-02-24 | Kanto Electrical Safety Inspection Association | High voltage insulation monitoring device, and high voltage insulation monitoring method |
| CN203204109U (en) * | 2013-04-24 | 2013-09-18 | 中铁电气化局集团有限公司 | Differential protection field calibration device of transformer |
Non-Patent Citations (1)
| Title |
|---|
| 彭金宁等: ""变压器零序差动保护电流互感器极性校对方法探讨"", 《研究与分析》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199349B (en) * | 2018-01-02 | 2024-05-31 | 中国电力科学研究院有限公司 | Series transformer valve side winding turn-to-turn zero sequence differential protection method and device |
| CN108199349A (en) * | 2018-01-02 | 2018-06-22 | 中国电力科学研究院有限公司 | A kind of series transformer valve side winding inter-turn zero sequence differential protecting method and device |
| CN108287286B (en) * | 2018-01-16 | 2023-03-14 | 济南置真电气有限公司 | Polarity verification method based on single-phase earth fault recording data |
| CN108287286A (en) * | 2018-01-16 | 2018-07-17 | 济南置真电气有限公司 | A kind of polarity check method based on singlephase earth fault recorder data |
| CN109283421A (en) * | 2018-10-16 | 2019-01-29 | 中铁电气化（武汉）设计研究院有限公司 | A kind of rail traction substation low-voltage is powered detection test method and device |
| CN109283421B (en) * | 2018-10-16 | 2024-02-09 | 中铁电气化（武汉）设计研究院有限公司 | Low-voltage power-on detection test method and device for railway traction substation |
| CN109856584A (en) * | 2018-11-13 | 2019-06-07 | 国网甘肃省电力公司电力科学研究院 | A kind of through-flow test method of 750kV converter station phase modifier system |
| CN109856584B (en) * | 2018-11-13 | 2024-02-06 | 国网甘肃省电力公司电力科学研究院 | Through-current test method of 750kV converter station camera system |
| CN109444644B (en) * | 2018-12-21 | 2020-12-29 | 南京国电南自电网自动化有限公司 | Transient component differential-based power distribution network single-phase earth fault line selection method |
| CN109444644A (en) * | 2018-12-21 | 2019-03-08 | 南京国电南自电网自动化有限公司 | Based on the differential wire selection method for power distribution network single phase earthing failure of transient |
| CN110850205B (en) * | 2019-11-12 | 2021-08-27 | 中车长春轨道客车股份有限公司 | Auxiliary device for differential flow monitoring test of motor train unit |
| CN110850205A (en) * | 2019-11-12 | 2020-02-28 | 中车长春轨道客车股份有限公司 | Auxiliary device for differential flow monitoring test of motor train unit |
| CN111257798B (en) * | 2020-01-16 | 2022-05-10 | 江苏广识电气有限公司 | Method for detecting polarity of zero sequence current of line selection and automatically correcting |
| CN111257798A (en) * | 2020-01-16 | 2020-06-09 | 江苏广识电气有限公司 | Method for detecting polarity of zero-sequence current of line selection and automatically correcting |
| CN111416430A (en) * | 2020-05-19 | 2020-07-14 | 中国电建集团福建省电力勘测设计院有限公司 | Multi-station-in-one engineering off-station power fusion wiring method |
| CN111416430B (en) * | 2020-05-19 | 2024-04-02 | 中国电建集团福建省电力勘测设计院有限公司 | Multi-station integrated engineering station external power fusion wiring method |
| CN113030620A (en) * | 2021-03-16 | 2021-06-25 | 马鞍山钢铁股份有限公司 | Transformer differential protection phasor test system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106569075B (en) | 2019-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106569075A (en) | Main transformer and high voltage side cable zero-sequence differential protection polarity test circuit and method | |
| EP3069426B1 (en) | Method and apparatus of reactor turn-to-turn protection | |
| CN205080251U (en) | Through -flow calibration system of current transformer secondary circuit | |
| CN102540001B (en) | Method of checking alternating current loop of a 500kV transformer substation through carrying out simulated through-type three-phase short circuit | |
| Gao et al. | Design and evaluation of a directional algorithm for transmission-line protection based on positive-sequence fault components | |
| CN102608485B (en) | Detection method for zero-sequence current loops of transformer substations | |
| CN102565618A (en) | Method for detecting zero-sequence voltage circuit of transformer substation | |
| CN103293446A (en) | Small-current grounding fault line selection method based on arc suppression coil | |
| CN110031718B (en) | Method for verifying integrity of alternating current circuit by pressurizing low-voltage side of railway traction station | |
| CN102510010A (en) | Method for checking and testing relay protection vector before operation of newly-built transformer station | |
| CN105785157A (en) | Double main transformer longitudinal differential protection loop closing testing method | |
| CN101614779A (en) | Differentiate the method for shunt reactor turn-to-turn short circuit, line to line fault and single-phase short circuit | |
| CN106684844A (en) | Island recognition method of distribution network | |
| CN103743994B (en) | Low-voltage load test method and device | |
| CN108051699A (en) | A kind of secondary loop of mutual inductor of transformer substation exception live detection method and system | |
| CN104898006B (en) | A kind of anticipation device of Current Transformer Secondary side open circuit | |
| CN113156276B (en) | Method for checking and debugging secondary voltage loop of bus alternating-current withstand voltage test of switching equipment | |
| CN105319478A (en) | Un-disassembly polarity and transformation ratio testing method for transformer bushing | |
| CN109212360B (en) | Relay protection vector determination test method based on synchronous triggering pressurization through-flow technology | |
| CN103630831B (en) | The check system of grounding direction protective relay | |
| CN208999501U (en) | A kind of main transformer is differential and current protection debugs auxiliary device | |
| Mohammad et al. | Turn-to-turn fault protection for dry-type shunt reactors | |
| Kokor et al. | Effects of neutral point grounding methods on single-phase short circuit fault characteristics | |
| CN105116352B (en) | The double set DC power system string electro-detection methods of substation | |
| CN103616657A (en) | Method for testing single-interval current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |