CN112965021A - Transformer substation bus PT voltage-passing system and method - Google Patents
Transformer substation bus PT voltage-passing system and method Download PDFInfo
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- CN112965021A CN112965021A CN202110162474.6A CN202110162474A CN112965021A CN 112965021 A CN112965021 A CN 112965021A CN 202110162474 A CN202110162474 A CN 202110162474A CN 112965021 A CN112965021 A CN 112965021A
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- 238000002955 isolation Methods 0.000 claims description 88
- 238000004804 winding Methods 0.000 claims description 20
- 238000012360 testing method Methods 0.000 claims description 17
- 230000007547 defect Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 3
- 238000000819 phase cycle Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
Abstract
The invention discloses a transformer substation bus PT (potential transformer) voltage-passing system and a transformer substation bus PT voltage-passing method, which comprise a first bus unit, a second bus unit, a first bus PT unit, a second bus PT unit, a bus coupler unit, a PT parallel unit and a relay protection tester; the system and the method can realize the PT voltage connection of the bus of the transformer substation, and have the characteristics of short voltage connection time, small working strength and high efficiency.
Description
Technical Field
The invention belongs to the technical field of power debugging and power testing, and relates to a transformer substation bus PT voltage-passing system and a transformer substation bus PT voltage-passing method.
Background
The transformer substation receives and distributes electric energy, controls the flow direction of the power flow and adjusts the voltage grade by connecting power grids of all voltage grades in the power system. The main primary equipment of the conventional transformer substation comprises a bus, switch equipment, a current transformer (CT for short), a voltage transformer (PT for short), a lightning arrester and the like. Before the transformer substation is put into operation for the first time, a voltage-on test needs to be carried out on the bus PT, so that the wiring of a secondary circuit of the bus PT is ensured to be correct, and the short-circuit phenomenon does not occur. When a traditional bus PT voltage passing test is carried out, the PT voltage passing test is usually carried out at an empty opening lower port of a PT control cubicle, PT secondary external loop voltage is measured by independently adding each PT secondary winding, the test method is well applied to a single-bus wiring mode and 3/2 wiring mode booster stations, but when the test method is applied to a double-bus wiring mode and a double-bus double-subsection wiring mode booster station, the test method is long in voltage passing time, high in working strength and low in efficiency, and at the moment, the finding of a transformer substation bus PT voltage passing system and method has important significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a transformer substation bus PT voltage-passing system and a transformer substation bus PT voltage-passing method.
In order to achieve the purpose, the transformer substation bus PT voltage-passing system comprises a first bus unit, a second bus unit, a first bus PT unit, a second bus PT unit, a bus coupler unit, a PT parallel unit and a relay protection tester;
the first bus unit is connected with the second bus unit through the bus coupler unit, the first bus PT unit is connected with the first bus unit, the second bus PT unit is connected with the second bus unit, and the PT parallel unit is connected with the relay protection tester, the first bus PT unit, the second bus PT unit and the bus coupler unit.
The first bus PT unit comprises a first bus PT, a first bus PT isolating disconnecting link, a first bus PT first grounding disconnecting link and a first bus PT second grounding disconnecting link;
the other end of the first bus PT isolation disconnecting link is connected with one end of a first bus PT second grounding disconnecting link and the first bus unit, and the other end of the first bus PT second grounding disconnecting link is grounded;
the first bus PT and the first bus PT isolation disconnecting link are connected with the PT parallel unit.
The second bus PT unit comprises a second bus PT, a second bus PT isolating disconnecting switch, a second bus PT first grounding disconnecting switch and a second bus PT second grounding disconnecting switch;
the other end of the second bus PT isolation disconnecting link is connected with one end of a second bus PT second grounding disconnecting link and a second bus unit, and the other end of the second bus PT second grounding disconnecting link is grounded;
the second bus PT isolation disconnecting link and the second bus PT are connected with the PT parallel unit.
The bus coupling unit comprises a bus coupling switch, a first bus side isolation disconnecting link, a second bus side isolation disconnecting link, a first bus side grounding disconnecting link and a second bus side grounding disconnecting link;
the first bus unit is connected with one end of a first bus side grounding disconnecting link and one end of a bus coupler switch through a first bus side isolation disconnecting link, the second bus unit is connected with the other end of the bus coupler switch and one end of a second bus side grounding disconnecting link through a second bus side isolation disconnecting link, and the other end of the second bus side grounding disconnecting link and the other end of the first bus side grounding disconnecting link are both grounded;
the bus coupler switch is connected with the PT parallel unit.
The PT parallel unit comprises a first bus voltage input unit, a second bus voltage input unit, a first bus voltage output unit, a second bus voltage output unit, a first bus voltage isolation unit, a second bus voltage isolation unit and a voltage parallel unit;
the voltage output end of the relay protection tester is connected with a first bus voltage input unit, a secondary loop of a first bus PT is connected with the first bus voltage input unit, a normally open auxiliary contact of a first bus PT isolation disconnecting link is connected with the first bus voltage isolation unit, a normally open auxiliary contact of a bus coupler switch is connected with a voltage parallel unit, a normally open auxiliary contact of a second bus PT isolation disconnecting link is connected with a second bus voltage isolation unit, a second bus PT secondary loop is connected with the second bus voltage input unit, and a first bus voltage output unit and a second bus voltage output unit are connected with an external secondary disk cabinet.
A transformer substation bus PT voltage-passing method comprises the following steps:
1) carrying out PT (potential transformer) voltage-passing preparation work on a bus of the transformer substation;
2) opening the relay protection tester, and adjusting the relay protection tester to output three-phase voltages with different amplitudes and opening voltages;
3) measuring and recording the actual voltage of the PT secondary circuit when the relay protection tester outputs three-phase voltages with different amplitudes and opening voltages;
4) judging whether the voltage measurement value of the PT secondary circuit is consistent with the output voltage value of the relay protection tester, and turning to the step 6) when the voltage measurement value of the PT secondary circuit is consistent with the output voltage value of the relay protection tester, or turning to the step 5);
5) closing the relay protection tester, searching and eliminating the PT secondary circuit defect, and turning to the step 2);
6) adjusting to enable the relay protection tester to output three-phase rated voltage and rated opening voltage;
7) measuring and recording the actual voltage of the PT secondary circuit when the relay protection tester outputs three-phase rated voltage and rated opening voltage;
8) judging whether the actual voltage of the PT secondary circuit is consistent with the output voltage value of the relay protection tester, and if so, turning to the step 10), otherwise, turning to the step 9, wherein the actual voltage of the PT secondary circuit is consistent with the output voltage value of the relay protection tester, and the wiring of the PT winding secondary voltage circuit is accurate and error-free;
9) closing the relay protection tester, searching and eliminating the PT secondary circuit defect, and turning to the step 6);
10) and carrying out a next winding voltage test on the bus PT.
The specific process of the transformer substation bus PT voltage-passing preparation work in the step 1) is as follows:
101) the method comprises the following steps of completing installation and acceptance work of all primary equipment and secondary equipment of the transformer substation, completing installation and debugging work of all secondary loops according to a design drawing, and completing static tests and transmission tests of all secondary disk cabinets of the transformer substation, so that all switches and disconnecting links of the transformer substation have remote operation conditions;
102) closing the first bus PT isolation disconnecting link, confirming that the first bus PT isolation disconnecting link acts correctly on site, indicating correctly, and confirming that the first bus voltage isolation unit acts correctly;
103) closing the second bus PT isolation disconnecting link, confirming that the second bus PT isolation disconnecting link acts correctly on site, indicating correctly, and confirming that the second bus voltage isolation unit acts correctly;
104) closing the first bus side isolation disconnecting link, the second bus side isolation disconnecting link and the bus coupler switch, confirming that the first bus side isolation disconnecting link, the second bus side isolation disconnecting link and the bus coupler switch act correctly and indicate correctly on site, and operating the first bus unit and the second bus unit in parallel in the PT parallel unit;
105) disconnecting each PT secondary air switch of the first bus PT unit local control cubicle and disconnecting each PT secondary air switch of the second bus PT unit local control cubicle to ensure that a primary loop and a secondary loop of the PT are isolated;
106) closing the voltage loop of each secondary disk cabinet and opening the voltage loop to ensure that each disk cabinet can acquire a voltage real-time value in the PT voltage-on process;
107) the relay protection tester voltage output channel A, B, C, X, N is connected to any one of the winding voltage input terminals corresponding to the first bus voltage input unit.
The specific operations of step 3) and step 7) are as follows:
301) measuring and recording the actual voltage value of the corresponding terminal of the first bus voltage output unit;
302) measuring and recording the actual voltage value of the corresponding terminal of the second bus voltage output unit;
303) measuring and recording the actual voltage value of the corresponding terminal of the second bus voltage input unit;
304) measuring and recording the actual voltage value of the PT empty opening lower port of the first bus PT control cabinet;
305) measuring and recording the actual voltage value of the empty opening lower port of the second bus PT control cubicle PT;
306) and measuring and recording a mother actual voltage value and two mother actual voltage values of each secondary disk cabinet.
The invention has the following beneficial effects:
when the transformer substation bus PT voltage passing system and the transformer substation bus PT voltage passing method are specifically operated, analog quantity is applied to a terminal corresponding to a first bus voltage input unit in a PT parallel unit through a relay protection tester, all bus PT voltage passing tests are completed, the relay protection tester does not need to be frequently moved, test wiring does not need to be frequently changed, the voltage passing time is short, the working strength is low, the test efficiency is high, the accuracy is high, the transformer substation bus PT voltage passing system and the transformer substation PT voltage passing method are applicable to various transformer substation double-bus wiring and double-bus double-section wiring transformer substations, the popularization and the use are convenient, the transformer substation bus PT secondary circuit wiring is ensured to be correct, no short circuit phenomenon exists, and safe power transmission and driving.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a schematic diagram of a secondary side of a first busbar PT of the present invention;
FIG. 3 is a schematic diagram of a secondary side of a second busbar PT of the present invention;
FIG. 4 is a schematic diagram of a PT parallel unit of the present invention;
FIG. 5 is a flow chart of the present invention.
Wherein, 1 is a first bus PT unit, 1-1 is a first bus PT, 1-2 is a first bus PT isolation disconnecting link, 1-3 is a first bus PT first grounding disconnecting link, 1-4 is a first bus PT second grounding disconnecting link, 2 is a first bus unit, 3 is a second bus unit, 4 is a second bus PT unit, 4-1 is a second bus PT, 4-2 is a second bus PT isolation disconnecting link, 4-3 is a second bus PT first grounding disconnecting link, 4-4 is a second bus PT second grounding disconnecting link, 5 is a bus connection unit, 5-1 is a first bus side isolation disconnecting link, 5-2 is a first bus side grounding disconnecting link, 5-3 is a bus connection switch, 5-4 is a second bus side grounding disconnecting link, 5-5 is a second bus side isolation disconnecting link, 6 is a PT parallel unit, 6-1 is a first bus voltage input unit, 6-2 is a first bus voltage isolation unit, 6-3 is a voltage parallel unit, 6-4 is a second bus voltage isolation unit, 6-5 is a second bus voltage input unit, 6-6 is a first bus voltage output unit, 6-7 is a second bus voltage output unit, and 7 is a relay protection tester.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the transformer substation bus PT voltage-passing system according to the present invention includes a first bus unit 2, a second bus unit 3, a first bus PT unit 1, a second bus PT unit 4, a bus coupler unit 5, a PT parallel unit 6, and a relay protection tester 7; the first bus unit 2 is connected with the second bus unit 3 through the bus coupler unit 5, the first bus PT unit 1 is connected with the first bus unit 2, the second bus PT unit 4 is connected with the second bus unit 3, and the PT parallel unit 6 is connected with the relay protection tester 7, the first bus PT unit 1, the second bus PT unit 4 and the bus coupler unit 5.
The first bus PT unit 1 comprises a first bus PT1-1, a first bus PT isolation disconnecting link 1-2, a first bus PT first grounding disconnecting link 1-3 and a first bus PT second grounding disconnecting link 1-4; the first bus PT1-1 is connected with one end of a first bus PT first grounding disconnecting link 1-3 and one end of a first bus PT isolating disconnecting link 1-2, the other end of the first bus PT first grounding disconnecting link 1-3 is grounded, the other end of the first bus PT isolating disconnecting link 1-2 is connected with one end of a first bus PT second grounding disconnecting link 1-4 and a first bus unit 2, and the other end of the first bus PT second grounding disconnecting link 1-4 is grounded; the first bus PT1-1 and the first bus PT isolation switch 1-2 are connected with the PT parallel unit 6.
The second bus PT unit 4 comprises a second bus PT4-1, a second bus PT isolation disconnecting link 4-2, a second bus PT first grounding disconnecting link 4-3 and a second bus PT second grounding disconnecting link 4-4; the second bus PT4-1 is connected with one end of a second bus PT first grounding disconnecting link 4-3 and one end of a second bus PT isolating disconnecting link 4-2, the other end of the second bus PT first grounding disconnecting link 4-3 is grounded, the other end of the second bus PT isolating disconnecting link 4-2 is connected with one end of a second bus PT second grounding disconnecting link 4-4 and a second bus unit 3, and the other end of the second bus PT second grounding disconnecting link 4-4 is grounded; the second bus PT isolation disconnecting link 4-2 and the second bus PT4-1 are connected with the PT parallel unit 6.
The bus coupling unit 5 comprises a bus coupling switch 5-3, a first bus side isolation disconnecting link 5-1, a second bus side isolation disconnecting link 5-5, a first bus side grounding disconnecting link 5-2 and a second bus side grounding disconnecting link 5-4; the first bus unit 2 is connected with one end of a first bus side grounding disconnecting link 5-2 and one end of a bus-coupled switch 5-3 through a first bus side isolation disconnecting link 5-1, the second bus unit 3 is connected with the other end of the bus-coupled switch 5-3 and one end of a second bus side grounding disconnecting link 5-4 through a second bus side isolation disconnecting link 5-5, and the other end of the second bus side grounding disconnecting link 5-4 and the other end of the first bus side grounding disconnecting link 5-2 are both grounded; the bus tie switch 5-3 is connected with the PT parallel unit 6.
The PT parallel unit 6 comprises a first bus voltage input unit 6-1, a second bus voltage input unit 6-5, a first bus voltage output unit 6-6, a second bus voltage output unit 6-7, a first bus voltage isolation unit 6-2, a second bus voltage isolation unit 6-4 and a voltage parallel unit 6-3; the voltage output end of the relay protection tester 7 is connected with a first bus voltage input unit 6-1, a secondary loop of a first bus PT1-1 is connected with the first bus voltage input unit 6-1, a normally open auxiliary contact of a first bus PT isolation disconnecting link 1-2 is connected with the first bus voltage isolation unit 6-2, a normally open auxiliary contact of a bus coupler 5-3 is connected with a voltage parallel unit 6-3, a normally open auxiliary contact of a second bus PT isolation disconnecting link 4-2 is connected with a second bus voltage isolation unit 6-4, a secondary loop of a second bus PT4-1 is connected with the second bus voltage input unit 6-5, and a first bus voltage output unit 6-6 and a second bus voltage output unit 6-7 are connected with an external secondary disk cabinet.
Referring to fig. 2, each phase of the first bus PT1-1 includes four windings, wherein the a phase of the secondary windings is 1PTa, 1PTa ', 1PTa ", 1 PTa'", the B phase of the secondary windings is 1PTb, 1PTb ', 1PTb ", 1 PTb'", the C phase of the secondary windings is 1PTc, 1PTc ', 1PTc ", 1 PTc'", 1PTa, 1PTb, 1PTc form a first group of three-phase voltages, and the loop numbers are a630, B630, C630, N630; 1PTA ', 1PTb', 1PTc 'form a second group of three-phase voltages, and the loop numbers are A630', B630', C630' and N630; 1PTA ", 1 PTb" and 1PTc "form a third group of three-phase voltages, and the loop numbers are A630", B630 ", C630" and N630; 1PTA ', 1PTb ', 1PTc ' are connected in series end to form open-circuit voltage, and loop numbers are L630 and N630.
Referring to fig. 3, the second bus PT4-1 includes four windings per phase secondary, wherein the a-phase secondary windings are 2PTa, 2PTa ', 2PTa ", 2 PTa'", the B-phase secondary windings are 2PTb, 2PTb ', 2PTb ", 2 PTb'", and the C-phase secondary windings are 2PTc, 2PTc ', 2PTc ", 2 PTc'". 2PTA, 2PTb and 2PTc form a first group of three-phase voltages, and the loop numbers are A640, B640, C640 and N640; 2PTA ', 2PTb' and 2PTc 'form a second group of three-phase voltages, and the loop numbers are A640', B640', C640' and N640; 2PTA ", 2 PTb", 2PTc "make up the third group of three-phase voltage, the loop number is A640", B640 ", C640", N640; 2PTA ', 2PTb ', 2PTc ' are connected in series end to form open-circuit voltage, and loop numbers are L640 and N640.
Referring to fig. 4, the first bus bar voltage input unit 6-1 is connected to the secondary winding of the first bus bar PT1-1, loop numbers a630, B630, C630, a630', B630', C630', a630 ", B630", C630 ", L630, N630; the second bus voltage input unit 6-5 is connected to a secondary winding of a second bus PT4-1, and the loop numbers are A640, B640, C640, A640', B640', C640', A640', B640', C640', L640 and N640; the first bus voltage output unit 6-6 is connected to each secondary disk cabinet, and the loop numbers are A631, B631, C631, A631', B631', C631', A631 ", B631", C631 ", L631, and N630; the second bus voltage output unit 6-7 is connected to each secondary disk cabinet, and the loop numbers are a641, B641, C641, a641', B641', C641', a641 ", B641", C641 ", L641 and N640; 1GLJ of the first bus voltage isolation unit 6-2 is connected to the auxiliary contact of the first bus PT isolation switch 1-2, and when the first bus PT isolation switch 1-2 is in a closing state, 1GLJ of the first bus voltage isolation unit 6-2 is closed; 2GLJ of the second bus voltage isolation unit 6-4 is connected to the auxiliary contact of the second bus PT isolation switch 4-2, and when the second bus PT isolation switch 4-2 is in a closing state, 2GLJ of the second bus voltage isolation unit 6-4 is closed; when the bus tie switch 5-3 is in a closing state and the PT parallel unit 6 receives a parallel instruction, the BLJ of the PT parallel unit 6 is closed;
when the transformer substation normally operates, the PT parallel unit 6 is withdrawn, the BLJ of the PT parallel unit 6 is in a disconnected state, the first bus voltage output is the first bus voltage input, and the second bus voltage output is the second bus voltage input; when a certain bus PT of the transformer substation needs to be overhauled and the transformer substation cannot be stopped, the isolation disconnecting switch corresponding to the bus PT to be overhauled can be disconnected, the bus voltage isolation unit is disconnected at the moment, the first bus voltage output unit 6-6 and the second bus voltage output unit 6-7 are operated in parallel through the PT parallel unit 6, and therefore the fact that one bus voltage sampling and two bus voltage sampling of each secondary panel cabinet are normal is guaranteed.
The transformer substation bus PT voltage-passing method comprises the following steps:
1) carrying out PT (potential transformer) voltage-passing preparation work on a bus of the transformer substation;
2) opening the relay protection tester 7, and adjusting the relay protection tester 7 to output three-phase voltages with different amplitudes and opening voltages;
3) measuring and recording the actual voltage of the PT secondary circuit when the relay protection tester 7 outputs three-phase voltages with different amplitudes and opening voltages;
4) judging whether the voltage measurement value of the PT secondary circuit is consistent with the output voltage value of the relay protection tester 7, and turning to the step 6) when the voltage measurement value of the PT secondary circuit is consistent with the output voltage value of the relay protection tester 7, or turning to the step 5);
5) closing the relay protection tester 7, searching and eliminating the PT secondary circuit defect, and turning to the step 2);
6) adjusting to enable the relay protection tester 7 to output three-phase rated voltage and rated opening voltage;
7) measuring and recording the actual voltage of the PT secondary circuit when the relay protection tester 7 outputs three-phase rated voltage and rated opening voltage;
8) judging whether the actual voltage of the PT secondary circuit is consistent with the output voltage value of the relay protection tester 7, if so, turning to the step 10), otherwise, turning to the step 9, wherein the actual voltage of the PT secondary circuit is consistent with the output voltage value of the relay protection tester 7, and the wiring of the PT winding secondary voltage circuit is accurate and error-free;
9) closing the relay protection tester 7, searching and eliminating the PT secondary circuit defect, and turning to the step 6);
10) and carrying out a next winding voltage test on the bus PT.
The specific process of the transformer substation bus PT voltage-passing preparation work in the step 1) is as follows:
101) the method comprises the following steps of completing installation and acceptance work of all primary equipment and secondary equipment of the transformer substation, completing installation and debugging work of all secondary loops according to a design drawing, and completing static tests and transmission tests of all secondary disk cabinets of the transformer substation, so that all switches and disconnecting links of the transformer substation have remote operation conditions;
102) closing the first bus PT isolation disconnecting link 1-2, confirming that the first bus PT isolation disconnecting link 1-2 acts correctly on site and indicates correctly, and confirming that the first bus voltage isolation unit 6-2 acts correctly;
103) closing the second bus PT isolation disconnecting link 4-2, confirming that the second bus PT isolation disconnecting link 4-2 acts correctly on site and indicates correctly, and confirming that the second bus voltage isolation unit 6-4 acts correctly;
104) closing the first bus side isolation disconnecting link 5-1, the second bus side isolation disconnecting link 5-5 and the bus coupler switch 5-3, confirming that the first bus side isolation disconnecting link 5-1, the second bus side isolation disconnecting link 5-5 and the bus coupler switch 5-3 act correctly on site and indicate correctly, and operating the first bus unit 2 and the second bus unit 3 in parallel in the PT parallel unit 6;
105) disconnecting the first bus PT unit 1 to perform secondary air opening on each PT of the local control cubicle, namely air opening 1ZK, 2ZK, 3ZK, 4ZK, 5ZK, 6ZK, 7ZK, 8ZK, 9ZK and 10 ZK; disconnecting the second bus PT unit 4 to perform secondary air opening on each PT of the local control cubicle, namely, the air opening is 1ZK ', 2ZK', 3ZK ', 4ZK', 5ZK ', 6ZK', 7ZK ', 8ZK', 9ZK 'or 10ZK', so that a primary loop and a secondary loop of the PT are isolated;
106) closing the voltage loop of each secondary disk cabinet and opening the voltage loop to ensure that each disk cabinet can acquire a voltage real-time value in the PT voltage-on process;
107) connecting a voltage output channel A, B, C, X, N of the relay protection tester 7 to any winding voltage input terminal corresponding to the first bus voltage input unit 6-1, wherein the sequence is A630, B630, C630, L630 and N630; a630', B630', C630', N630; a630 ", B630", C630 ", N630. .
The specific operations of step 3) and step 7) are as follows:
301) measuring and recording the actual voltage value of the corresponding terminal of the first bus voltage output unit 6-6, wherein the actual voltage value is A631, B631, C631, L631 and N630 in sequence; a631', B631', C631', N630; a631 ", B631", C631 ", N630;
302) measuring and recording actual voltage values of corresponding terminals of the second bus voltage output unit 6-7, wherein the actual voltage values are A641, B641, C641, L641 and N640 in sequence; a641', B641', C641', N640; a641 ", B641", C641 ", N640;
303) measuring and recording the actual voltage value of the corresponding terminal of the second bus voltage input unit 6-5, wherein the sequence is A640, B640, C640, L640 and N640; a640', B640', C640', N640; a640', B640', C640', N640;
304) measuring and recording the actual voltage value of the empty opening lower port of the first bus PT1-1 control cabinet PT, wherein the sequence is A630, B630, C630, L630 and N630; a630', B630', C630', N630; a630', B630', C630', N630;
305) measuring and recording the actual voltage value of the empty opening lower port of the second bus PT4-1 control cubicle PT, wherein the sequence is A640, B640, C640, L640 and N640; a640', B640', C640', N640; a640', B640', C640', N640;
306) and measuring and recording a mother actual voltage value and two mother actual voltage values of each secondary disk cabinet.
Finally, it should be noted that the invention, through the bus PT pass-voltage test, not only verifies the integrity and accuracy of the bus PT secondary circuit, ensures the PT secondary circuit wiring correct, no short circuit phenomenon, at the same time, through the actual operation of the switch, the knife switch, the simulation verifies the functionality and reliability of the PT parallel unit 6, in addition, the invention, through the relay protection tester 7 output three-phase different amplitude voltage, check and record PT secondary circuit actual voltage value, distinguish PT secondary circuit phase sequence, ensure PT secondary circuit phase sequence correct, secondly, through relay protection tester 7 output three-phase rated voltage, again record PT secondary circuit actual voltage value, ensure PT secondary circuit wiring correct.
Claims (8)
1. A transformer substation bus PT voltage passing system is characterized by comprising a first bus unit (2), a second bus unit (3), a first bus PT unit (1), a second bus PT unit (4), a bus connection unit (5), a PT parallel unit (6) and a relay protection tester (7);
the first bus unit (2) is connected with the second bus unit (3) through the bus connection unit (5), the first bus PT unit (1) is connected with the first bus unit (2), the second bus PT unit (4) is connected with the second bus unit (3), and the PT parallel unit (6) is connected with the relay protection tester (7), the first bus PT unit (1), the second bus PT unit (4) and the bus connection unit (5).
2. The substation busbar PT voltage conduction system according to claim 1, characterized in that the first busbar PT unit (1) comprises a first busbar PT (1-1), a first busbar PT isolation switch (1-2), a first busbar PT first grounding switch (1-3) and a first busbar PT second grounding switch (1-4);
the device comprises a first bus PT (1-1), a second bus PT, a first grounding disconnecting link (1-3), a first bus PT isolating disconnecting link (1-2), a second bus PT, a second grounding disconnecting link (1-3), a second bus PT, a third bus PT, a fourth bus PT, a fifth bus PT, a sixth bus, a sixth;
the first bus PT (1-1) and the first bus PT isolation disconnecting link (1-2) are connected with the PT parallel unit (6).
3. The substation busbar PT voltage conduction system according to claim 1, characterized in that the second busbar PT unit (4) comprises a second busbar PT (4-1), a second busbar PT isolation switch (4-2), a second busbar PT first grounding switch (4-3) and a second busbar PT second grounding switch (4-4);
a second bus PT (4-1) is connected with one end of a second bus PT first grounding disconnecting link (4-3) and one end of a second bus PT isolating disconnecting link (4-2), the other end of the second bus PT first grounding disconnecting link (4-3) is grounded, the other end of the second bus PT isolating disconnecting link (4-2) is connected with one end of a second bus PT second grounding disconnecting link (4-4) and a second bus unit (3), and the other end of the second bus PT second grounding disconnecting link (4-4) is grounded;
the second bus PT isolation disconnecting link (4-2) and the second bus PT (4-1) are connected with the PT parallel unit (6).
4. The transformer substation bus PT voltage-passing system according to claim 1, characterized in that the bus coupling unit (5) comprises a bus coupling switch (5-3), a first bus side isolation disconnecting link (5-1), a second bus side isolation disconnecting link (5-5), a first bus side grounding disconnecting link (5-2) and a second bus side grounding disconnecting link (5-4);
the first bus unit (2) is connected with one end of a first bus side grounding disconnecting link (5-2) and one end of a bus-coupled switch (5-3) through a first bus side isolation disconnecting link (5-1), the second bus unit (3) is connected with the other end of the bus-coupled switch (5-3) and one end of a second bus side grounding disconnecting link (5-4) through a second bus side isolation disconnecting link (5-5), and the other end of the second bus side grounding disconnecting link (5-4) and the other end of the first bus side grounding disconnecting link (5-2) are grounded;
the bus tie switch (5-3) is connected with the PT parallel unit (6).
5. The substation busbar PT voltage-passing system according to claim 1, characterized in that the PT parallel unit (6) comprises a first busbar voltage input unit (6-1), a second busbar voltage input unit (6-5), a first busbar voltage output unit (6-6), a second busbar voltage output unit (6-7), a first busbar voltage isolation unit (6-2), a second busbar voltage isolation unit (6-4) and a voltage parallel unit (6-3);
the voltage output end of the relay protection tester (7) is connected with a first bus voltage input unit (6-1), a secondary loop of a first bus PT (1-1) is connected with the first bus voltage input unit (6-1), a normally open auxiliary contact of a first bus PT isolation disconnecting switch (1-2) is connected with the first bus voltage isolation unit (6-2), a normally open auxiliary contact of a bus coupler switch (5-3) is connected with a voltage parallel unit (6-3), a normally open auxiliary contact of a second bus PT isolation disconnecting switch (4-2) is connected with a second bus voltage isolation unit (6-4), a secondary loop of the second bus (4-1) is connected with the second bus voltage input unit (6-5), and the first bus voltage output unit (6-6) and the second bus voltage output unit (6-7) are connected with an external secondary panel cabinet.
6. A transformer substation bus PT voltage-passing method is characterized by comprising the following steps:
1) carrying out PT (potential transformer) voltage-passing preparation work on a bus of the transformer substation;
2) opening the relay protection tester (7), and adjusting the relay protection tester (7) to output three-phase voltages with different amplitudes and opening voltages;
3) measuring and recording the actual voltage of the PT secondary circuit when the relay protection tester (7) outputs three-phase voltages with different amplitudes and opening voltages;
4) judging whether the voltage measurement value of the PT secondary circuit is consistent with the output voltage value of the relay protection tester (7), and turning to the step 6 if the voltage measurement value of the PT secondary circuit is consistent with the output voltage value of the relay protection tester (7), otherwise, turning to the step 5);
5) closing the relay protection tester (7), searching and eliminating the PT secondary circuit defect, and turning to the step 2);
6) adjusting to enable the relay protection tester (7) to output three-phase rated voltage and rated opening voltage;
7) measuring and recording the actual voltage of the PT secondary circuit when the relay protection tester (7) outputs three-phase rated voltage and rated opening voltage;
8) judging whether the actual voltage of the PT secondary circuit is consistent with the output voltage value of the relay protection tester (7), if so, turning to the step 10, otherwise, turning to the step 9, if not, indicating that the wiring of the PT winding secondary voltage circuit is accurate and error-free;
9) closing the relay protection tester (7), searching and eliminating the PT secondary circuit defect, and then turning to the step 6);
10) and carrying out a next winding voltage test on the bus PT.
7. The transformer substation bus PT voltage-passing method according to claim 6, wherein the concrete process of transformer substation bus PT voltage-passing preparation work in step 1) is as follows:
101) the method comprises the following steps of completing installation and acceptance work of all primary equipment and secondary equipment of the transformer substation, completing installation and debugging work of all secondary loops according to a design drawing, and completing static tests and transmission tests of all secondary disk cabinets of the transformer substation, so that all switches and disconnecting links of the transformer substation have remote operation conditions;
102) closing the first bus PT isolation disconnecting link (1-2), confirming that the first bus PT isolation disconnecting link (1-2) acts correctly on site and indicates correctly, and confirming that the first bus voltage isolation unit (6-2) acts correctly;
103) closing the second bus PT isolation disconnecting link (4-2), confirming that the second bus PT isolation disconnecting link (4-2) acts correctly on site and indicates correctly, and confirming that the second bus voltage isolation unit (6-4) acts correctly;
104) closing the first bus side isolation disconnecting link (5-1), the second bus side isolation disconnecting link (5-5) and the bus tie switch (5-3), confirming that the first bus side isolation disconnecting link (5-1), the second bus side isolation disconnecting link (5-5) and the bus tie switch (5-3) act correctly and indicate correctly on site, and operating the first bus unit (2) and the second bus unit (3) in parallel in the PT parallel unit (6);
105) disconnecting each PT secondary air switch of the local control cubicle of the first bus PT unit (1) and disconnecting each PT secondary air switch of the local control cubicle of the second bus PT unit (4) to ensure that a primary loop and a secondary loop of the PT are isolated;
106) closing the voltage loop of each secondary disk cabinet and opening the voltage loop to ensure that each disk cabinet can acquire a voltage real-time value in the PT voltage-on process;
107) and connecting a voltage output channel A, B, C, X, N of the relay protection tester (7) to any one corresponding winding voltage input terminal of the first bus voltage input unit (6-1).
8. The transformer substation bus PT voltage-connecting method according to claim 6, characterized in that the specific operations of step 3) and step 7) are as follows:
301) measuring and recording the actual voltage value of the corresponding terminal of the first bus voltage output unit (6-6);
302) measuring and recording the actual voltage value of the corresponding terminal of the second bus voltage output unit (6-7);
303) measuring and recording the actual voltage value of the corresponding terminal of the second bus voltage input unit (6-5);
304) measuring and recording the actual voltage value of the empty opening lower port of a first bus PT (1-1) control cabinet PT;
305) measuring and recording the actual voltage value of the empty opening lower port of a second bus PT (4-1) control cubicle PT;
306) and measuring and recording a mother actual voltage value and two mother actual voltage values of each secondary disk cabinet.
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| CN202110162474.6A CN112965021A (en) | 2021-02-05 | 2021-02-05 | Transformer substation bus PT voltage-passing system and method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037389A (en) * | 2017-03-31 | 2017-08-11 | 西安热工研究院有限公司 | A kind of PT leads to pressure method |
| CN108462170A (en) * | 2018-04-04 | 2018-08-28 | 国网福建省电力有限公司电力科学研究院 | Intelligent substation interval combining unit voltage automatic Synchronization and method for handover control |
| CN108899900A (en) * | 2018-07-17 | 2018-11-27 | 国网湖南省电力有限公司 | Transforming plant protecting and observing and controlling site secondary device voltage are side by side and switching method |
| CN111624426A (en) * | 2020-06-02 | 2020-09-04 | 西安热工研究院有限公司 | System and method for verifying bus differential protection polarity in double-bus system wiring mode |
-
2021
- 2021-02-05 CN CN202110162474.6A patent/CN112965021A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037389A (en) * | 2017-03-31 | 2017-08-11 | 西安热工研究院有限公司 | A kind of PT leads to pressure method |
| CN108462170A (en) * | 2018-04-04 | 2018-08-28 | 国网福建省电力有限公司电力科学研究院 | Intelligent substation interval combining unit voltage automatic Synchronization and method for handover control |
| CN108899900A (en) * | 2018-07-17 | 2018-11-27 | 国网湖南省电力有限公司 | Transforming plant protecting and observing and controlling site secondary device voltage are side by side and switching method |
| CN111624426A (en) * | 2020-06-02 | 2020-09-04 | 西安热工研究院有限公司 | System and method for verifying bus differential protection polarity in double-bus system wiring mode |
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