CN113189411A - Phase checking method for synchronous voltage loop of generator set with outlet circuit breaker - Google Patents
Phase checking method for synchronous voltage loop of generator set with outlet circuit breaker Download PDFInfo
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- CN113189411A CN113189411A CN202110157704.XA CN202110157704A CN113189411A CN 113189411 A CN113189411 A CN 113189411A CN 202110157704 A CN202110157704 A CN 202110157704A CN 113189411 A CN113189411 A CN 113189411A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
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- 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
- G01R31/34—Testing dynamo-electric machines
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- 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
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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- 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
- G01R31/72—Testing of electric windings
Abstract
A method of phasing a contemporaneous voltage circuit including an outlet circuit breaker generator set, comprising the steps of: the method comprises the following steps of firstly, carrying out secondary nuclear phase tests on a bus side voltage transformer PT1 and a generator outlet breaker upper opening side voltage transformer PT 2; secondly, performing secondary nuclear phase tests (zero-rise voltage test method) by using a generator outlet breaker upper port side voltage transformer PT2 and a generator terminal side voltage transformer PT 3; thirdly, performing secondary nuclear phase tests (a method of a pseudo-synchronization test) on a voltage transformer PT2 at the upper port side of the generator outlet breaker and a voltage transformer PT3 at the generator terminal side; and step four, reporting the test. The invention effectively prevents the secondary polarity and phase sequence errors of the bus and the generator set PT, avoids the generator from causing large impact current at the moment of grid connection, and ensures that the insulation performance of the generator does not cause damage.
Description
Technical Field
The invention relates to the field of power generation, in particular to a nuclear phase method of a synchronous voltage loop of a generator set with an outlet circuit breaker.
Background
The generator set generally only adopts a 'false synchronization' mode to test a synchronization loop. When the zero lifting voltage of the generator set reaches the rated voltage, measuring whether the frequency, the amplitude and the waveform of the secondary side voltage at the bus and the generator terminal are the same or not on a synchronous device; and on the premise of disconnecting the isolating switch, an automatic quasi-synchronization device is put into the isolating switch, so that the circuit breaker completes switching on at the synchronous point of the voltage of the isolating switch and the voltage of the circuit breaker.
The circuit breaker is not suitable for a generator set with an outlet circuit breaker, and voltage transformers are arranged at the upper port of the outlet circuit breaker and the generator end; the polarity and phase sequence of the two groups of voltage transformers need to be synchronously tested with the bus voltage transformer. The above-described method cannot satisfy such a requirement.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a phase checking method for a synchronous voltage loop of a generator set with an outlet circuit breaker, which is used for testing the synchronous voltage loop of the generator set with the outlet circuit breaker and ensuring the correctness of the polarity and the phase sequence of secondary side voltages at a bus side, an upper opening side of the outlet circuit breaker of a generator and a generator side.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method of phasing a contemporaneous voltage circuit including an outlet circuit breaker generator set, comprising the steps of:
the method comprises the following steps of firstly, carrying out secondary nuclear phase tests on a bus side voltage transformer PT1 and a generator outlet breaker upper opening side voltage transformer PT 2;
secondly, performing secondary nuclear phase tests (zero-rise voltage test method) by using a generator outlet breaker upper port side voltage transformer PT2 and a generator terminal side voltage transformer PT 3;
thirdly, performing secondary nuclear phase tests (a method of a pseudo-synchronization test) on a voltage transformer PT2 at the upper port side of the generator outlet breaker and a voltage transformer PT3 at the generator terminal side;
and step four, reporting the test.
The invention also has the following additional technical features:
the technical scheme of the invention is further specifically optimized as follows: in the first step: and (3) closing the main transformer high-voltage side circuit breaker (02), and confirming that the secondary voltage nuclear phase of PT1 and PT2 is correct by comparing the secondary side voltage of the bus side voltage transformer PT1 with the secondary side voltage waveform of the upper port side voltage transformer PT2 of the outlet circuit breaker (01) in a consistent manner. If the waveforms cannot be overlapped, recovery measures are required for processing.
The technical scheme of the invention is further specifically optimized as follows: in the second step: and (3) disconnecting a main transformer high-voltage side circuit breaker (02), and switching the auxiliary power system to a starting-up transformer. After the generator is started at zero power and manually de-energized, the generator outlet circuit breaker (01) is manually switched on. After the lock is released, the generator is manually excited and boosted. The secondary voltage of a generator terminal voltage transformer PT3 is compared with the secondary voltage waveform of an upper port side voltage transformer PT2 of an outlet breaker (01) in a consistent mode, and therefore the PT2 and PT3 are confirmed to be correct in nuclear phase. If the waveforms cannot be overlapped, recovery measures are required for processing.
The technical scheme of the invention is further specifically optimized as follows: in the third step: and (3) disconnecting a main transformer high-voltage side circuit breaker (02), and switching the auxiliary power system to a high-voltage substation. Under the condition of forcing the disconnecting switch (01-1) to be opened, the generator is started at zero power, excitation and voltage boosting are completed, and the breaker (01) is switched on through a synchronous device. The secondary nuclear phase of PT2 and PT3 after the false phase is confirmed to be correct again through the consistency comparison of the secondary side voltage of the generator terminal PT3 and the secondary side voltage waveform of the outlet PT2 of the breaker (01). If the waveforms cannot be overlapped, recovery measures are required for processing.
The technical scheme of the invention is further specifically optimized as follows: in the fourth step: after three groups of tests are compared, the secondary side voltage waveforms of PT1, PT2 and PT3 at the same time are compared in a consistent mode, and finally the phase verification of the synchronous voltage loop of the generator set is confirmed to be correct.
Compared with the prior art, the invention has the advantages that: the invention effectively prevents the secondary polarity and phase sequence errors of the bus and the generator set PT, avoids the generator from causing large impact current at the moment of grid connection, and ensures that the insulation performance of the generator does not cause damage.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a method for testing a core phase of a contemporaneous voltage loop of a generator set with an outlet circuit breaker according to the present invention;
FIG. 2 is a schematic main wiring diagram of the gas turbine generator set of the present invention;
fig. 3-8 are partial schematic views of fig. 2.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings, in order that the present disclosure may be more fully understood and fully conveyed to those skilled in the art. While the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the invention is not limited to the embodiments set forth herein.
A method of phasing a contemporaneous voltage circuit including an outlet circuit breaker generator set, comprising the steps of:
step one, performing secondary nuclear phase tests on a bus side voltage transformer PT1 and a generator outlet circuit breaker upper opening side voltage transformer PT 2.
Specifically, in the step one: and (3) closing the main transformer high-voltage side circuit breaker (02), and confirming that the secondary voltage nuclear phase of PT1 and PT2 is correct by comparing the secondary side voltage of the bus side voltage transformer PT1 with the secondary side voltage waveform of the upper port side voltage transformer PT2 of the outlet circuit breaker (01) in a consistent manner. If the waveforms cannot be overlapped, recovery measures are required for processing.
And step two, performing secondary nuclear phase tests (zero-rise voltage test method) by using a generator outlet breaker upper port side voltage transformer PT2 and a generator terminal side voltage transformer PT 3.
Specifically, in the step two: and (3) disconnecting a main transformer high-voltage side circuit breaker (02), and switching the auxiliary power system to a starting-up transformer. After the generator is started at zero power and manually de-energized, the generator outlet circuit breaker (01) is manually switched on. After the lock is released, the generator is manually excited and boosted. The secondary voltage of a generator terminal voltage transformer PT3 is compared with the secondary voltage waveform of an upper port side voltage transformer PT2 of an outlet breaker (01) in a consistent mode, and therefore the PT2 and PT3 are confirmed to be correct in nuclear phase. If the waveforms cannot be overlapped, recovery measures are required for processing.
And step three, performing secondary nuclear phase tests (a method of a pseudo-synchronization test) on a voltage transformer PT2 at the upper port side of the generator outlet breaker and a voltage transformer PT3 at the generator terminal side.
Specifically, the third step is as follows: and (3) disconnecting a main transformer high-voltage side circuit breaker (02), and switching the auxiliary power system to a high-voltage substation. Under the condition of forcing the disconnecting switch (01-1) to be opened, the generator is started at zero power, excitation and voltage boosting are completed, and the breaker (01) is switched on through a synchronous device. The secondary nuclear phase of PT2 and PT3 after the false phase is confirmed to be correct again through the consistency comparison of the secondary side voltage of the generator terminal PT3 and the secondary side voltage waveform of the outlet PT2 of the breaker (01). If the waveforms cannot be overlapped, recovery measures are required for processing.
And step four, reporting the test.
Specifically, the fourth step: after three groups of tests are compared, the secondary side voltage waveforms of PT1, PT2 and PT3 at the same time are compared in a consistent mode, and finally the phase verification of the synchronous voltage loop of the generator set is confirmed to be correct.
Examples
First, bus voltage and 03 switch outlet circuit breaker voltage waveform confirmation
1.1. Closing 2203-5 isolation knife switch and 2203 switch; and closing 225-9 bus side voltage transformer isolating switches.
The 1.2.10kV factory power supply is switched to a working incoming line (switches 0131 and 0132 are switched off, and switches 131 and 132 are switched on).
1.3. And (3) measuring the voltage of the PT secondary side at the bus side and the voltage of the PT secondary side at the upper port of the GCB outlet of the #3 generator by using a Beijing Bo electric oscillograph to confirm whether the voltage waveforms at the two sides are effectively superposed.
1.4. If the PT wiring of the GCB upper port of the outlet of the #3 generator is incorrect, the PT (03-94PT, 03-93PT) wiring of the GCB upper port is adjusted, and a secondary phase checking test needs to be carried out again after the adjustment until the PT wiring of the GCB upper port is verified to be correct.
1.5. And if the PT wiring of the generator is correct, reporting the value to the value length, and preparing a zero lifting pressure test.
Zero-lifting-pressure test of generator set
2.1. And (3) confirming the primary side fuses of the generator ends 03-91PT and 03-92PT of the #3 combustion engine, and confirming the opening and closing of the secondary side fuses of the PT.
2.2. And confirming the grounding knife switch 03-17 and controlling the power supply to be disconnected in an idle mode.
2.3. The protection A/B set of 'sensitive direction power protection' and 'undervoltage protection' of the #3 combustion engine generator is withdrawn.
2.4. Reporting to the value length, preparing to do a zero lifting pressure test, and dispatching and applying from the value length direction.
2.5. And (3) closing the 03-2 isolating knife switch.
And 2.6.#3 combustion engine generator is increased to the rated speed.
The 2.7.10kV factory power supply is switched to a standby incoming line (switches 131 and 132 are switched off, and switches 0131 and 0132 are switched on), the 2203 switch and the 2203-5 isolating knife switch are pulled, and the motor power supply of the circuit breaker, the motor power supply of the mechanism and the mechanism control power supply are pulled to be switched on and off.
And 2.8.#3 combustion engine generator Ex2100e excitation regulator is used for manually de-excitation and maintaining the rated rotating speed.
2.9. And temporarily removing 03 the switch to the closing feedback signal of the thermal MarkVIe. Meanwhile, the thermal force #3 gas turbine generator load instruction is zero.
2.10. A short circuit 03-2 isolates the normally closed auxiliary contact of the disconnecting link, and the switch 03 is manually closed on the spot.
2.11. And (3) temporarily removing 03 switch to normally open auxiliary contacts (excitation regulator cabinets TB2:41, 42) of an excitation regulator AVR cabinet between #3 combustion engine excitation, setting the EX2100e excitation regulator to be in a constant voltage mode, closing a de-excitation switch, and performing a zero-lifting-pressure test.
2.12. The thermal engineering temporarily relieves the speed increasing, speed reducing and instruction output of the automatic quasi-synchronization device.
2.13. In the zero pressure rise process, a Monitor observation mode under 'SynchControl' is selected in a thermotechnical operator station, and the voltage phasor relation of a system side and a generator side is observed. If the signals are completely the same, the automatic quasi-synchronization device indicates a synchronization position, and the PT connection of the generator is correct; otherwise the generator PT is not wired correctly.
2.14. In the zero-rise voltage process, a Beijing Bo electric oscilloscope is used to lead out a PT voltage contact (TBVTD:5/6) at the generator terminal and a PT voltage contact (TBVTD:7/8) at the outlet GCB upper port of a #3 generator from a #3PEECC generator measurement and neutral point protection cabinet (30MKY04) to confirm whether voltage waveforms on two sides are effectively overlapped.
2.15. In the zero-voltage-rise process, a Beijing Bo electric oscillograph is used, a PT voltage A \ B \ C phase connection point (1-21UD:11/12/13/14) at the upper port of a #3 generator outlet circuit breaker GCB is led out from an AGC measurement and control cabinet (Y0AST01) of an electronic room unit, and a second PTVT4 voltage A \ C phase connection point (D1: 1/3/4) at the outlet of a #3 generator is led out from a #3 generator outlet fault oscillograph (30CFQ01) of an electronic room unit, so that whether voltage waveforms on two sides are effectively superposed or not is confirmed.
2.16. If the PT of the generator is not correctly connected, the generator exits from the automatic quasi-synchronization device, the #3 gas turbine generator is de-energized, the hand is switched on and off 03, and the #3 gas turbine generator is stopped. And adjusting the PT connection of the generator, and performing secondary nuclear phase test again after adjustment until the PT connection of the generator is verified to be correct.
2.17. If the PT of the generator is correctly connected, the automatic quasi-synchronization device is withdrawn, the #3 gas turbine generator is de-energized, the hand is separated from the 03 switch, and the 03-2 isolating disconnecting link is pulled open. And recovering a switching-on feedback signal from the 03 switch to the thermal MarkVIe, and removing the normally-closed auxiliary contacts (K90O: 23, 24) of the 03-2 isolating knife switch, the normally-open auxiliary contacts (TB 2:41, 42) of the excitation regulator AVR cabinet between the 03 switch and the #3 combustion engine excitation regulator and the related oscilloscope wiring.
2.18. The #3 combustion engine generator is used for protecting the A/B set of sensitive direction power protection and undervoltage protection.
2.19. And reporting the value to the long time, and ending the boosting of the #3 gas turbine generator from zero.
Three, false synchronization test
1.1. Closing 2203-5 isolation knife switch and 2203 switch.
The 1.2.10kV factory power supply is switched to a working incoming line (switches 0131 and 0132 are switched off, and switches 131 and 132 are switched on).
1.3. The protection A/B set of 'sensitive direction power protection' and 'undervoltage protection' of the #3 combustion engine generator is withdrawn.
1.4. Reporting to the value length, preparing to make a pseudo-synchronization test, and scheduling and applying from the value length direction.
1.5. And pulling the control power supply of the 03-2 isolating disconnecting switch open, and confirming the control power supply of the 03 switch open. The remote closing normally-open auxiliary contact of the short circuit 03-2 isolation knife switch locking 03 switch (03 switch control cabinet K90C:23, 24).
1.6. The switch is temporarily removed 03 to the closing feedback signal of the hot MarkVIe (PEECC patch X01:13, 14, X01:15, 16, two pairs in total). The 03-2 isolation disconnecting switch is short-circuited to a normally open auxiliary contact (PEECC small wiring X01:65, 66) of the thermal engineering, and meanwhile, the load instruction of the generator of the #3 combustion engine is forced to be zero by the thermal engineering.
1.7. The normally open auxiliary contacts (excitation regulator cabinets TB2:41, 42) from the switch 03 to the #3 combustion engine inter-field excitation regulator AVR cabinet are temporarily removed, and the setting of the #3 combustion engine inter-field excitation regulator in a constant voltage mode is confirmed.
1.8. A Beijing Bo electric oscilloscope is used for leading out a PT voltage contact (TBVTD:5/6) at a generator terminal of a #3PEECC generator measuring and neutral point protecting cabinet (30MKY04), a PT voltage contact (TBVTD:7/8) at an outlet GCB upper port of the #3 generator and 03 normally-open auxiliary contacts (PEECC wiring cubicles X01:55, 56) as closing time points, and confirming whether voltage waveforms on two sides are effectively coincided or not during closing.
1.9. In the thermal operator station, Auto under SynchControl is selected for automatic synchronization. It is confirmed 03 that the switch should be reliably closed at the synchronization point. And after the inspection is finished, the automatic quasi-synchronization device is withdrawn.
1.10. And (3) observing the waveform recorded by the oscilloscope, confirming 03 that the switch is accurately switched on at the synchronous point, otherwise, adjusting the lead time, and repeating the pseudo-synchronization test until the switch is qualified.
1.11.#3 combustion engine generator de-excitation, and the hand divides 03 switch.
1.12. Restoring 03 switches to thermodynamic closing feedback signals (two pairs of PEECC wiring rooms X01:13, 14, X01:15, 16), removing short wires (PEECC wiring rooms X01:65, 66) from 03-2 isolation disconnecting switches to thermodynamic normally-open auxiliary contacts, removing short wires (03 switch control cabinets K90C:23, 24) from 03-2 isolation disconnecting switch locking 03 switches to the normally-open auxiliary contacts of the distant closing of the switch, and restoring 03 switches to the normally-open auxiliary contacts (excitation regulator cabinets TB2:41, 42) of #3 combustion engine excitation interval excitation regulator AVR cabinets. And (5) dismantling the test wire of the oscillograph. And the thermal engineering removes the force on the load instruction of the #3 gas turbine generator.
1.13. The #3 combustion engine generator is used for protecting the A/B set of sensitive direction power protection and undervoltage protection.
Reporting to the value length, finishing the pseudo-synchronization test, and reporting to the value length direction scheduling.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described above with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the above detailed description of the embodiments of the invention presented in the drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (5)
1. A nuclear phase method of a synchronous voltage loop containing an outlet circuit breaker generator set is characterized by comprising the following steps:
the method comprises the following steps of firstly, carrying out secondary nuclear phase tests on a bus side voltage transformer PT1 and a generator outlet breaker upper opening side voltage transformer PT 2;
secondly, performing secondary nuclear phase tests on a voltage transformer PT2 at the upper port side of the generator outlet breaker and a voltage transformer PT3 at the generator terminal side;
thirdly, performing secondary nuclear phase tests on a voltage transformer PT2 at the upper port side of the generator outlet breaker and a voltage transformer PT3 at the generator terminal side;
and step four, reporting the test.
2. The method of claim 1, wherein the method comprises the steps of: in the first step: switching on a main transformer high-voltage side circuit breaker (02), and confirming that secondary voltages of PT1 and PT2 are correct in nuclear phase through consistency comparison between the secondary side voltage of a bus side voltage transformer PT1 and the secondary side voltage waveform of an upper port side voltage transformer PT2 of an outlet circuit breaker (01); if the waveforms cannot be overlapped, recovery measures are required for processing.
3. The method of claim 1, wherein the method comprises the steps of: in the second step: disconnecting a main transformer high-voltage side circuit breaker (02), and switching the auxiliary power system to a starting-up transformer; after the generator is started at zero power and manually de-energized, a generator outlet circuit breaker (01) is manually switched on; after the lock is released, the generator is manually excited and boosted; the secondary voltage of a generator terminal voltage transformer PT3 is compared with the secondary voltage waveform of an upper port side voltage transformer PT2 of an outlet breaker (01) in a consistent manner, and the PT2 and PT3 are confirmed to be correct in nuclear phase; if the waveforms cannot be overlapped, recovery measures are required for processing.
4. The method of claim 1, wherein the method comprises the steps of: in the third step: disconnecting a main transformer high-voltage side circuit breaker (02), and switching the service power system to a high-voltage substation; under the condition that the forced isolating switch (01-1) is switched off, the generator is started at zero power, excitation and voltage boosting are completed, and the breaker (01) is switched on through a synchronous device; the secondary nuclear phase of PT2 and PT3 after the false phase is confirmed to be correct again by comparing the voltage of the secondary side of a generator terminal PT3 with the voltage waveform of the secondary side of an outlet PT2 of a breaker (01) in a consistent manner; if the waveforms cannot be overlapped, recovery measures are required for processing.
5. The method of claim 1, wherein the method comprises the steps of: in the fourth step: after three groups of tests are compared, the secondary side voltage waveforms of PT1, PT2 and PT3 at the same time are compared in a consistent mode, and finally the phase verification of the synchronous voltage loop of the generator set is confirmed to be correct.
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| CN114285072B (en) * | 2021-12-20 | 2023-11-24 | 上海电气燃气轮机有限公司 | Automatic sequential control method, system, terminal and medium for synchronous grid connection of heavy-duty gas turbine at double nodes |
| CN114415020A (en) * | 2022-01-20 | 2022-04-29 | 广东韶钢松山股份有限公司 | Test method for dynamic debugging of generator |
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| CN115542146B (en) * | 2022-11-30 | 2023-03-24 | 南方电网调峰调频发电有限公司 | Method, device, equipment and medium for synchronously testing outlet switch device of generator set |
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Application publication date: 20210730 |