CN204116405U - A kind of GIS is with frequency homophase controlling test protective device - Google Patents
A kind of GIS is with frequency homophase controlling test protective device Download PDFInfo
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- CN204116405U CN204116405U CN201420589759.3U CN201420589759U CN204116405U CN 204116405 U CN204116405 U CN 204116405U CN 201420589759 U CN201420589759 U CN 201420589759U CN 204116405 U CN204116405 U CN 204116405U
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 230000001681 protective effect Effects 0.000 title claims abstract description 43
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 8
- 230000011664 signaling Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 abstract description 5
- 239000013307 optical fiber Substances 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
The utility model discloses a kind of GIS with frequently homophase controlling test protective device, comprise for obtain trial voltage and reference voltage signal and carry out multilevel iudge protection monitoring module, for measure in real time trial voltage and reference voltage high-tension measurement module, for exporting the PLL control module of same frequency same-phase test signal; And for receiving each functional module instruction, realize the public control module that protecting control output, instruction input and data show.The one that the utility model provides, with frequency homophase withstand voltage test control protective unit, is applied to frequency homophase AC voltage withstand test; Integrate protection, control, measure three zones; Effectively avoid and to occur that various accident makes the asynchronous or isolation fracture of frequency plot puncture etc. and causes danger to operational system, experimental facilities and the person in frequently homophase withstand voltage test.
Description
Technical field
The utility model relates to technical field of electric power, and particularly a kind of GIS is with frequency homophase controlling test protective device.
Background technology
Cubicle Gas-Insulated Switchgear (hereinafter referred to as GIS) is applied more and more extensive in electric system, but GIS, after interval enlarging and maintenance (particularly double bus scheme GIS), all needs to carry out withstand voltage test when original operation brownout.GIS expansion spacing or Disintegration overhaul interval and adjacent part of running disconnect by means of only disconnector, if operation part does not have a power failure, then keep apart during ac voltage withstanding and turn off mouth place and trial voltage may occur oppositely superpose with working voltage the situation causing isolation fracture to puncture and then jeopardize operational outfit, therefore during the standard regulation GIS withstand voltage test such as DL/T555, DL/T617, DL/T618, neighbouring device answers power-off and ground connection, otherwise should consider to take measures due to the damage punctured suddenly original part causes.
And for some important load-center substations and the GIS transformer station with important loads such as traction station of electrical railroad, particularly double-bus GIS, these transformer stations require very high to power supply reliability, are difficult to carry out withstand voltage test when full station has a power failure.For head it off, spy proposes GIS with frequency homophase alternating current withstand voltage test method.
GIS adopts neighbouring device working voltage (as getting bus-bar potential transformer secondary side voltage) as the reference voltage with frequency homophase AC voltage withstand test technology, trial voltage is obtained by resonance manner, and utilize PHASE-LOCKED LOOP PLL TECHNIQUE to carry out real time dynamic tracing to its frequency and phase place, the frequency of trial voltage and working voltage and phase place are in frequency cophasal state.
Under same cophasal state frequently, the voltage that the disconnector fracture place of operation part and junction, tested interval bears is the difference of working voltage and trial voltage, as shown in Figure 1, the real difference for both sides absolute value of voltage of the voltage magnitude that disconnector incision position bears, much smaller than the frequency breakdown voltage of disconnector fracture, thus this disconnector fracture can not be caused to puncture, also can not the GIS device that other is in charging operation state be had an impact.Wherein, U1 represents trial voltage; U2 represents working voltage; △ U represents fracture voltage; Same homophase withstand voltage test frequently carries out under the condition that adjacent part is charged, and its safety and reliability is particularly important.Have a negative impact to adjacent operation part in order to avoid occurring in test various accident to make isolation fracture puncture and experimental facilities and the person caused to danger, will seeking common ground frequently, homophase withstand voltage test control protective unit is enough reliable.
The GIS withstand voltage test before extensively adopted is to trial voltage frequency and phase place not requirement, and corresponding control protective unit is mainly protected by overvoltage protection and arc protection two kinds of modes, output of cutting off the electricity supply.Overvoltage protection refers to acquisition test voltage, and when trial voltage is higher than setting value, protection act is cut off the electricity supply; Arc protection, i.e. o-volt protection, when causing voltage to reduce due to flashover, protection act is cut off the electricity supply.
But above-mentioned GPF (General Protection False mode cannot meet the protection requirement with homophase withstand voltage test frequently; under above-mentioned protected mode; if with homophase failure frequently, (namely trial voltage and reference voltage frequency plot change in process of the test; asynchronous), under serious conditions, trial voltage and reference voltage oppositely may cause isolation switch to puncture and cause charging operation partial fault.In this case, protection can not action, cannot protect equipment.
Therefore, how protecting with homophase withstand voltage test frequently, avoiding operational outfit, testing equipment and personnel to suffer damage under the conditions such as fracture punctures, is current problem demanding prompt solution.
Utility model content
In view of this, technical problem to be solved in the utility model is to provide a kind of with frequency homophase withstand voltage test control protective unit, and solving GPF (General Protection False mode cannot to the problem protected with homophase withstand voltage test frequently.
The utility model is achieved through the following technical solutions:
A kind of GIS that the utility model provides, with frequently homophase controlling test protective device, is characterized in that: comprise for obtain trial voltage and reference voltage signal and carry out multilevel iudge protection monitoring module, for measure in real time trial voltage and reference voltage high-tension measurement module, for exporting the PLL control module of same frequency same-phase test signal; And for receiving each functional module instruction, realize the public control module that protecting control output, instruction input and data show.
Further, also comprise for receiver voltage lifting start and stop class control signal and protection definite value class data-signal and the input interface of the public control module transferred to.
Further, also comprise for receive and show public control module output signal display module.
Further, this control protective unit need with frequently homophase experiment power supply, PT low pressure winding, series resonant equipment and voltage divider with the use of;
Described same homophase experiment power supply is frequently connected with the output port of control protective unit;
The reference voltage that described PT low pressure winding produces is input to the reference voltage port of control protective unit;
The trial voltage that described voltage divider obtains is input to the trial voltage port of control protective unit.
Further, the shell for holding protection monitoring module, high-tension measurement module, PLL control module and public control module is also comprised; Described shell is provided with guidance panel, described guidance panel is provided with and the trial voltage signaling interface of high-tension measurement model calling, reference voltage signal interface;
The the first oscilloscope signal interface for showing trial voltage waveform on oscillograph be connected with trial voltage signaling interface;
The the second oscilloscope signal interface for showing bus working voltage waveform on oscillograph be connected with reference voltage signal interface;
For exporting the same frequency homophase control interface be connected with frequency homophase experiment power supply with frequency in-phase voltage signal.
The beneficial effects of the utility model are: the one that the utility model provides, with frequency homophase withstand voltage test control protective unit, is applied to frequency homophase AC voltage withstand test.Integrate protection, control, measure three zones.Based on frequency plot protection, each cycle measures busbar voltage and trial voltage in real time, and calculates the phase differential of trial voltage and busbar voltage, and when phase difference value exceedes setting valve, protection act, cuts off the electricity supply.Additionally provide the guard method of fracture overvoltage and flashover, each cycle measures busbar voltage and trial voltage in real time simultaneously, the protection act when fracture voltage exceedes setting value; When fracture punctures, during fracture voltage bust, protection act.Effectively avoid the various accidents occurred in same homophase withstand voltage test frequently isolation fracture is punctured and has a negative impact to adjacent operation part and cause danger to experimental facilities and the person.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein:
Fig. 1 is with disconnector fracture voltage waveform schematic diagram under frequency cophasal state;
A kind of GIS that Fig. 2 provides for the embodiment of the present application is with homophase controlling test protective device frequently and the connection diagram with homophase pilot system frequently;
A kind of GIS same homophase controlling test frequently protective device schematic appearance that Fig. 3 provides for the embodiment of the present application;
The inner theory diagram of a kind of GIS same homophase controlling test frequently protective device that Fig. 4 provides for the embodiment of the present application.
Embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only in order to the utility model is described, instead of in order to limit protection domain of the present utility model.
Embodiment 1
As shown in Figures 2 to 4, a kind of GIS that the utility model provides, with frequently homophase controlling test protective device, is characterized in that: comprise for obtain trial voltage and reference voltage signal and carry out multilevel iudge protection monitoring module, for measure in real time trial voltage and reference voltage high-tension measurement module, for exporting the PLL control module of same frequency same-phase test signal; And for receiving each functional module instruction, realize the public control module that protecting control output, instruction input and data show.
Further, also comprise for receiver voltage lifting start and stop class control signal and protection definite value class data-signal and the input interface of the public control module transferred to.
Further, also comprise for receive and show public control module output signal display module.
Further, this control protective unit need with frequently homophase experiment power supply, PT low pressure winding, series resonant equipment and voltage divider with the use of;
Described same homophase experiment power supply is frequently connected with the output port of control protective unit;
The reference voltage that described PT low pressure winding produces is input to the reference voltage port of control protective unit;
The trial voltage that described voltage divider obtains is input to the trial voltage port of control protective unit.
Further, the shell for holding protection monitoring module, high-tension measurement module, PLL control module and public control module is also comprised; Described shell is provided with guidance panel, described guidance panel is provided with and the trial voltage signaling interface of high-tension measurement model calling, reference voltage signal interface;
The the first oscilloscope signal interface for showing trial voltage waveform on oscillograph be connected with trial voltage signaling interface;
The the second oscilloscope signal interface for showing bus working voltage waveform on oscillograph be connected with reference voltage signal interface;
For exporting the same frequency homophase control interface be connected with frequency homophase experiment power supply with frequency in-phase voltage signal.
The protection monitoring module that the present embodiment provides, high-tension measurement module, PLL control module and public control module concrete function are as follows:
The difference on the frequency of trial voltage and reference voltage and phase differential are judged that signal is sent to public control module by described protection monitoring module;
Real-time Collection trial voltage and reference voltage data are sent to public control module by described high-tension measurement module;
Trial voltage and reference voltage are undertaken exporting the signal reached with frequency homophase to public control module again with after homophase adjustment frequently by phaselocked loop by described PLL control module;
Described public control module is sent to by power supply communication optical fiber after receiving the judgement signal protecting monitoring module to export again and controls with frequency homophase power switch with frequency homophase power supply;
Described public control module is received the measurement data of high-tension measurement module output and data is presented on a display screen by display module;
The same frequency in-phase signal that described public control module reception PLL control module exports will be also by being sent to frequency homophase power supply with frequency in-phase signal with frequency with phase control optical fiber;
Described public control module receives the voltage up-down start and stop class control signal of input interface and controls to realize voltage up-down and start and stop with frequency homophase power supply by power supply communication optical fiber;
Described public control module receives the protection definite value class data-signal of input interface and sends the data to protecting control module for the protection of calculating judgement.
Embodiment 2
A kind of GIS that Fig. 2 provides for the embodiment of the present application is with homophase controlling test protective device frequently and the connection diagram with homophase pilot system frequently; As shown in Figure 2, comprise with frequency homophase experiment power supply 21, series resonant equipment 22, voltage divider 23 with frequency homophase pilot system; In figure, top horizontal line represents bus; that be connected with bus is mutual inductor PT; the reference voltage that mutual inductor PT exports is to control protective unit; with homophase experiment power supply is by being connected with control protective unit with power supply connection with frequency homophase control line frequently, trial voltage signal is input in control protective unit by voltage divider 23.
Reference voltage input terminal with frequency homophase control protective unit is connected with a low pressure winding of PT, the voltage on the low pressure winding obtaining PT, and by the voltage of acquisition as the reference voltage; Trial voltage input end with frequency homophase control protective unit is connected with the test lead of voltage divider 23, and voltage output end is connected with the input end of series resonant equipment 22.Same frequency in-phase signal output terminal with frequency homophase control protective unit is connected with the same frequency in-phase signal input end with frequency homophase experiment power supply 21 by optical fiber, exports and the synchronous signal of reference voltage same frequency; Power supply communication output terminal with frequency homophase control protective unit is connected with the power supply communication input end with frequency homophase experiment power supply 21 by optical fiber, exports various Control protection signal.Signal output part with frequently homophase control protective unit is connected with oscillographic signal input part, by the waveform of oscillograph real-time monitored trial voltage and reference voltage.
A kind of GIS same homophase controlling test frequently protective device schematic appearance that Fig. 3 provides for the embodiment of the present application.
In Fig. 3,1 represents trial voltage signaling interface; 2 represent fuse; 3 represent reference voltage signal interface; 4 represent oscilloscope signal interface CH1, for showing trial voltage waveform on oscillograph; 5 represent oscilloscope signal interface CH2, for showing bus working voltage waveform on oscillograph; 6 represent with frequency homophase control interface, export same in-phase voltage signal frequently; 7 represent optical communication interface, out-put supply control signal; 8 represent startup button; 9 represent anxious stops button; 10 represent that voltage rises button; 11 represent voltage drop button; 12 represent that thickness regulates; 13 represent that timing starts; 14 represent power switch; 15 represent supply socket; 16 represent oscillograph supply socket; 17 represent touch display screen.The parameters such as testing equipment rated voltage, fracture voltage protection value, trial voltage protection value are set by touch display screen.Display screen can show trial voltage, working voltage, fracture voltage, frequency, phase place equivalence.
The inner theory diagram of a kind of GIS same homophase controlling test frequently protective device that Fig. 4 provides for the embodiment of the present application.
In Fig. 4, GIS same homophase controlling test frequently protective device is by three functional modules: protection monitoring module, high-tension measurement module, PLL control module and a public control module form.Protection monitoring module acquisition test voltage and reference voltage phase place, compare both frequency and phase place, and carry out calculating judgement, judges that signal is sent to public control module the most at last; High-tension measurement module acquires trial voltage and reference voltage, measure in real time, and measurement data is sent to public control module; PLL control module acquisition test voltage and reference voltage, undertaken, with homophase adjustment frequently, reaching and exporting signal to public control module with after frequency homophase by phaselocked loop.
Public control module is the control core of package unit.Public control module accepts the judgement signal that protection monitoring module exports, and is sent to frequency homophase power supply, controls power switch, play a protective role by power supply communication optical fiber; Public control module accepts the measurement data that high-tension measurement module exports, and data is presented on a display screen by display module; Public control module accepts the same frequency in-phase signal that PLL control module exports, and by same homophase power supply frequently will be sent to frequency in-phase signal with frequency with phase control optical fiber.Public control module accepts load module control signal (voltage up-down, start and stop class), controls to realize voltage up-down, start and stop with frequency homophase power supply by power supply communication optical fiber; Public control module accepts load module data-signal (protection definite value class), and sends the data to protecting control module for the protection of calculating judgement.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described the utility model by referring to preferred embodiment of the present utility model, but those of ordinary skill in the art is to be understood that, various change can be made to it in the form and details, and not depart from the spirit and scope that the utility model limits.
Claims (5)
1. GIS is with a frequently homophase controlling test protective device, it is characterized in that: comprise for obtain trial voltage and reference voltage signal and carry out multilevel iudge protection monitoring module, for measure in real time trial voltage and reference voltage high-tension measurement module, for exporting the PLL control module of same frequency same-phase test signal; And for receiving each functional module instruction, realize the public control module that protecting control output, instruction input and data show.
2. GIS according to claim 1 is with frequency homophase controlling test protective device, it is characterized in that: also comprise for receiver voltage lifting start and stop class control signal and protection definite value class data-signal and the input interface of the public control module transferred to.
3. GIS according to claim 1 is with frequently homophase controlling test protective device, it is characterized in that: also comprise for receiving and showing the display module of public control module output signal.
4. GIS according to claim 1 is with frequently homophase controlling test protective device, it is characterized in that: also need with homophase experiment power supply, PT low pressure winding, series resonant equipment and voltage divider frequently with the use of; Described same homophase experiment power supply is frequently connected with the output port of control protective unit; The reference voltage that described PT low pressure winding produces is input to the reference voltage port of control protective unit; The trial voltage that described voltage divider obtains is input to the trial voltage port of control protective unit.
5. GIS according to claim 1 is with frequency homophase controlling test protective device, it is characterized in that: also comprise the shell for holding protection monitoring module, high-tension measurement module, PLL control module and public control module; Described shell is provided with guidance panel, described guidance panel is provided with and the trial voltage signaling interface of high-tension measurement model calling, reference voltage signal interface; The the first oscilloscope signal interface for showing trial voltage waveform on oscillograph be connected with trial voltage signaling interface; The the second oscilloscope signal interface for showing bus working voltage waveform on oscillograph be connected with reference voltage signal interface; For exporting the same frequency homophase control interface be connected with frequency homophase experiment power supply with frequency in-phase voltage signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420589759.3U CN204116405U (en) | 2014-10-11 | 2014-10-11 | A kind of GIS is with frequency homophase controlling test protective device |
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| CN201420589759.3U CN204116405U (en) | 2014-10-11 | 2014-10-11 | A kind of GIS is with frequency homophase controlling test protective device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388440A (en) * | 2015-11-09 | 2016-03-09 | 国网重庆市电力公司电力科学研究院 | Method for verifying reliability of common-frequency in-phase alternating-current voltage-withstanding testing apparatus of GIS |
| CN105425120A (en) * | 2015-11-12 | 2016-03-23 | 国网辽宁省电力有限公司盘锦供电公司 | GIS same frequency and phase AC voltage withstand test system |
| CN105807193B (en) * | 2016-05-09 | 2019-03-01 | 国网重庆市电力公司电力科学研究院 | A kind of same frequency with safe sampled signal is the same as phase Withstand test device |
| CN110045253A (en) * | 2019-05-17 | 2019-07-23 | 中国能源建设集团安徽电力建设第一工程有限公司 | A kind of GIS is same frequently with phase pressure resistant test method |
| CN111596246A (en) * | 2019-02-20 | 2020-08-28 | 国网冀北电力有限公司 | Same-frequency same-phase calibration device and calibration method thereof |
-
2014
- 2014-10-11 CN CN201420589759.3U patent/CN204116405U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388440A (en) * | 2015-11-09 | 2016-03-09 | 国网重庆市电力公司电力科学研究院 | Method for verifying reliability of common-frequency in-phase alternating-current voltage-withstanding testing apparatus of GIS |
| CN105388440B (en) * | 2015-11-09 | 2018-11-27 | 国网重庆市电力公司电力科学研究院 | GIS is with frequency with phase alternating-current voltage resistance test device reliability verification method |
| CN105425120A (en) * | 2015-11-12 | 2016-03-23 | 国网辽宁省电力有限公司盘锦供电公司 | GIS same frequency and phase AC voltage withstand test system |
| CN105807193B (en) * | 2016-05-09 | 2019-03-01 | 国网重庆市电力公司电力科学研究院 | A kind of same frequency with safe sampled signal is the same as phase Withstand test device |
| CN111596246A (en) * | 2019-02-20 | 2020-08-28 | 国网冀北电力有限公司 | Same-frequency same-phase calibration device and calibration method thereof |
| CN110045253A (en) * | 2019-05-17 | 2019-07-23 | 中国能源建设集团安徽电力建设第一工程有限公司 | A kind of GIS is same frequently with phase pressure resistant test method |
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