CN201319052Y - Auto-switch-on integrated tester - Google Patents
Auto-switch-on integrated tester Download PDFInfo
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- CN201319052Y CN201319052Y CNU2008202151453U CN200820215145U CN201319052Y CN 201319052 Y CN201319052 Y CN 201319052Y CN U2008202151453 U CNU2008202151453 U CN U2008202151453U CN 200820215145 U CN200820215145 U CN 200820215145U CN 201319052 Y CN201319052 Y CN 201319052Y
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Abstract
The utility model discloses an auto-switch-on integrated tester and relates to the integrated testers of auto-switch-on devices in the field of electric power systems and power supply systems. The auto-switch-on integrated tester not only meets the prior art, but also can emulate the operation status of primary systems and the fault status of main transformers, and fully and directly detect the status of the tested auto-switch-on device. The auto-switch-on integrated tester comprises an upper computer, a lower computer, an analog amplifier, a breaker analog circuit and a transformer status emulation circuit; the lower computer is connected with the analog amplifier by a digital-to-analog converter; the lower computer is connected with the breaker analog circuit and the transformer status emulation circuit; the lower computer and the breaker analog circuit are provided with data interfaces which exchange with the tested auto-switch-on device in two ways; the analog amplifier is provided with a voltage and current output connected with the tested auto-switch-on device, and P1 and P2 outputs connected with the breaker analog circuit; the transformer status emulation circuit is provided with an interface which transmits the transformer status signal to the tester auto-switch-on device in a single direction, and B1 and B2 outputs connected with the breaker analog circuit.
Description
Technical field
The utility model relates to power system power supply system field, is particularly suitable for transformer station and responsible consumer dual power supply or the many power supplys backup auto-activating device of the stand-by power supply mode instrument that carries out integration test each other.
Background technology
In electrical production and supply process, for guaranteeing power supply reliability, reduce to greatest extent the user is had a power failure, transformer station and responsible consumer generally adopt dual power supply or many power supplys stand-by power supply mode each other, automatic throw-in equipment of emergency power supply AAT (being called for short " backup auto-activating device ") is an intelligent control device of realizing this function, and its safe and reliable operation is to guarantee that power supply is equipped with the successful key of throwing.
According to statistical data, the power outage that causes because of the tripping of backup auto-activating device own and malfunction still accounts for suitable ratio in the electric system power outage, because adopt the device association complexity of dual power supply or multi-power system power supply, the method of operation is changeable, and the on-the-spot realistic simulation test of backup auto-activating device can't be carried out because of needs change power supply mode or have a power failure.Whole group transmission test link is many, and wiring is complicated and waste time and energy, and makes mistakes easily, therefore judge and can the checking backup auto-activating device regular event, and be a very loaded down with trivial details and difficult job.
According to the requirement of Protection Technology supervision, the new backup auto-activating device of going into operation and the periodic inspection of backup auto-activating device must be qualified through the belt switch transmission test, with the reliability of guaranteeing device and the correctness of external circuit.Thereby guarantee that after working power or equipment disconnect because of failure and other reasons device can correct operation, guarantees power supply.Simultaneously,, before doing the switch transmission test, to carry out simulation test earlier, guarantee that device itself reliably to improve test efficiency, can also reduce the switch motion number of times simultaneously, to help the safe operation of primary equipment according to the convention of reaying protection test.At transformer station's built by separate periods and primary connection not exclusively and the periodic inspection under the back switch normal operating condition of going into operation, contradiction is more outstanding, can't carry out transmission test at all.In actual field, do not have suitable simulation test means and equipment.The logic of backup auto-activating device and the reliability in loop thereof, correctness can't guarantee.
At present domestic have the method for carrying out the automatic throw-in equipment of emergency power supply check comparatively loaded down with trivial details, the test connection complexity, the test very flexible, check is wasted time and energy, and test effect is not ideal enough, can't simulate the various states that actual capabilities occur fully, the mimic-disconnecting switch of use also well mimic-disconnecting switch steal and jump or the tripping state, the dereliction accident hinders analog machine.Feasible state to equipment under test can not comprehensively detect.
The utility model content
The utility model is at above problem, providing a kind of is satisfying under the prerequisite of prior art, primary system running status and main transformer malfunction can also be simulated, thereby the prepared auto restart comprehensive tester of state-detection can be realized comprehensively, intuitively to tested backup auto-activating device.
The technical solution of the utility model is: link to each other with tested backup auto-activating device, comprise host computer, slave computer, it also comprises analogue amplifier, isolating switch mimic channel, transformer state artificial circuit, and slave computer links to each other by digital to analog converter with described analogue amplifier; Slave computer links to each other by I/O with described isolating switch mimic channel, transformer state artificial circuit; Slave computer, isolating switch mimic channel are provided with the data-interface with tested backup auto-activating device two-way exchange; Described analogue amplifier is provided with the electric current and voltage delivery outlet that connects tested backup auto-activating device, and the P1, the P2 delivery outlet that connect the isolating switch mimic channel; Described transformer state artificial circuit is provided with the interface that one-way transmission transformer state signal is given tested backup auto-activating device, and the B1, the B2 delivery outlet that connect the isolating switch mimic channel.
Described isolating switch mimic channel comprises interconnective L1, L2 and F isolating switch, and the import of L1 and L2 isolating switch links to each other with P1, the P2 delivery outlet of analogue amplifier respectively; Establish the M1 point between L1 and F, the M1 point connects the B1 delivery outlet; Establish the M2 point between L2 and F, the M2 point connects the B2 delivery outlet; L1, L2 link to each other with tested backup auto-activating device by data line respectively with F isolating switch and M1, M2 point, and L1, L2 link to each other with slave computer by I/O respectively simultaneously with the F isolating switch.
Establish in the slave computer record according to host computer instruction send various running statuses and receive L1, L2 and F isolating switch in tested backup auto-activating device logic feedback, the isolating switch mimic channel the action feedback, will aforementioned each information storer by the program of host computer demonstration.
It is parameter typing, display terminal that the utility model adopts host computer (PC), slave computer (MCU) is a control section, sends needed various analog quantity (voltage and current) and a plurality of digital quantity (I/O) by analogue amplifier, isolating switch mimic channel, transformer state artificial circuit to tested AAT; MCU receives the feedback signal of AAT, in time passes to PC by serial ports, is carried out and by graphic presentation, is reflected the residing state of tested AAT in time by it, and whether analyze tested AAT normal.Can simulate tens of kinds of phenomena of the failure under the available for different connection modes, comprise the various abnormal conditions that the prepared auto restart application places may occur substantially, can make comprehensively and judge accurately and differentiate the reliability of tested AAT.
By the investigation to principle of work, functional configuration and the secondary connection of various model backup auto-activating devices, we think: the difficult point that backup auto-activating device is tested is to simulate the breaker tripping and closing logic that contact and checking backup auto-activating device are left of leaving of actual switch.Core is the switch Design of Simulating Circuits.As long as simulate three～four isolating switchs, just can realize transmission test to tested backup auto-activating device.Isolating switch mimic channel of the present utility model has been realized above-mentioned conception, has proposed a kind of isolating switch mimic channel, and has provided two kinds of typical test connections, has successfully solved the backup auto-activating device transmission test, and this perplexs relay protection personnel's a difficult problem for a long time.The utility model has solved the transmission test problem of backup auto-activating device, has guaranteed backup auto-activating device correct, action message when electrical network has an accident.Improve power supply reliability, improved the quality of power supply, increased the indirect economic benefit of enterprise; Also solve the difficult problem of backup auto-activating device field-checking well, filled up the domestic blank of backup auto-activating device tester, also be very easy to equipment debugging personnel's work on the spot.
Description of drawings
Fig. 1 is a circuit configurations block diagram of the present utility model
ATT is tested backup auto-activating device among the figure, and PC is a host computer, and MCU is a slave computer, and arrow is signal, electric current, voltage transmission direction,
Fig. 2 is the fundamental diagram of isolating switch mimic channel in the utility model
Embodiment
The utility model links to each other with tested backup auto-activating device as shown in Figure 1, comprises host computer, slave computer, and it also comprises analogue amplifier, isolating switch mimic channel, transformer state artificial circuit, and slave computer links to each other by digital to analog converter with described analogue amplifier; Slave computer links to each other by I/O with described isolating switch mimic channel, transformer state artificial circuit; Slave computer, isolating switch mimic channel are provided with the data-interface with tested backup auto-activating device two-way exchange; Described analogue amplifier is provided with the electric current and voltage delivery outlet that connects tested backup auto-activating device, and the P1, the P2 delivery outlet that connect the isolating switch mimic channel; Described transformer state artificial circuit is provided with the interface that one-way transmission transformer state signal is given tested backup auto-activating device, and the B1, the B2 delivery outlet that connect the isolating switch mimic channel.Described isolating switch mimic channel comprises interconnective L1, L2 and F isolating switch, and the import of L1 and L2 isolating switch links to each other with P1, the P2 delivery outlet of analogue amplifier respectively; Establish the M1 point between L1 and F, the M1 point connects the B1 delivery outlet; Establish the M2 point between L2 and F, the M2 point connects the B2 delivery outlet; L1, L2 link to each other with tested backup auto-activating device by data line respectively with F isolating switch and M1, M2 point, and L1, L2 link to each other with slave computer by I/O respectively simultaneously with the F isolating switch.Establish in the slave computer record according to host computer instruction send various running statuses and receive L1, L2 and F isolating switch in tested backup auto-activating device logic feedback, the isolating switch mimic channel the action feedback, will aforementioned each information storer by the program of host computer demonstration.
The utility model principle of work as shown in Figure 2, PC passes to slave computer according to default debugging module and each autoregressive parameter by communication interface; Slave computer is according to the instruction of accepting, parameter separately is transferred to analogue amplifier, isolating switch mimic channel, transformer state artificial circuit and tested backup auto-activating device respectively, establish in the slave computer record according to PC instruction send various running statuses and receive associated actuator part action feedback in the AAT logic feedback, 2, will above-mentioned each information storer by the program of PC demonstration.
In conjunction with Fig. 2 the course of work of the present utility model is described now:
One, the AAT under single internal bridge form
Export to the analog quantity of AAT device by analogue amplifier: line current (two groups), line voltage distribution (single-phase two groups), busbar voltage (two groups of three-phases),
There is the output of pressure: U＞Uset*1.03 that stream output: I＞Iset*1.03 is arranged
Do not have the output of pressure: U＜Uset*0.97 and do not have stream output: I＜Iset*0.97
The switching value of being exported to the AAT device by isolating switch mimic channel, transformer state artificial circuit, MCU has: main transformer malfunction (2), the position of the switch (making war or close point for 3), the mimic-disconnecting switch that is provided by the isolating switch mimic channel is 3.
One, L1 standby (P1, P2, M1, M2 all have pressure, and L2 has stream, and L1 divides the position, and L2, F close the position)
1.1.0 original state: P1, P2, M1, M2 all have pressure, and L2 has stream, and L1 divides the position, and L2, F1 close the position, the AAT logic: charging;
1.1.1 simulation L2 does not have stream, AAT logic: no change;
1.1.2 simulation P1 decompression, the AAT logic: alarm, the time-delay discharge is also posted a letter;
1.1.3 simulation M1 decompression, AAT logic: only alarm;
1.1.4 simulation M2 decompression, AAT logic: only alarm;
1.1.5 simulation M1, M2 decompression, AAT logic: only alarm;
1.1.6 simulation M1 decompression, L2 does not have stream, the AAT logic: only alarm;
1.1.7 simulation M2 decompression, L2 does not have stream: the AAT logic: only alarm;
1.1.8 simulation M1, M2 decompression, L2 does not have stream, the AAT logic: jump L2 and close L1, recharge (normal logic);
Simulate L2 and refuse branch, the AAT logic this moment: jump F and close L1, do not recharge concurrent letter;
Simulate L1 refuse to close the AAT logic this moment: jump that to close L1 behind the L2 unsuccessful, discharge and post a letter;
1.2.1 simulation B1 fault, F tripping (AAT has input signal), AAT logic: discharge and post a letter;
1.2.2 simulation B2 fault, F, L2 tripping, AAT logic: close behind the L1 discharge and post a letter;
F tripping this moment, L2 refuse branchs, the AAT logic: close and discharge behind the L1 and post a letter;
This moment, F refused branch, L2 tripping, the AAT logic: discharge and post a letter;
Two, L2 standby (P1, P2, M1, M2 all have pressure, and L1 has stream, and L2 divides the position, and L1, F close the position)
1.1.0 original state: P1, P2, M1, M2 all have pressure, and L1 has stream, and L2 divides the position, and L1, F close the position, the AAT logic: charging;
1.1.1 simulation L1 does not have stream, AAT logic: no change;
1.1.2 simulation P2 decompression, the AAT logic: alarm, the time-delay discharge is also posted a letter;
1.1.3 simulation M1 decompression, AAT logic: only alarm;
1.1.4 simulation M2 decompression, AAT logic: only alarm;
1.1.5 simulation M1, M2 decompression, AAT logic: only alarm;
1.1.6 simulation M1 decompression, L1 does not have stream, the AAT logic: only alarm;
1.1.7 simulation M2 decompression, L1 does not have stream: the AAT logic: only alarm;
1.1.8 simulation M1, M2 decompression, L1 does not have stream, the AAT logic: jump L2 and close L1, recharge (normal logic);
Simulate L1 and refuse branch, the AAT logic this moment: jump F and close L2, do not recharge concurrent letter;
Simulate L2 refuse to close the AAT logic this moment: jump that to close L2 behind the L1 unsuccessful, discharge and post a letter;
1.2.1 simulation B2 fault, F tripping (AAT open into), AAT logic: discharge and post a letter;
1.2.2 simulation B1 fault, F, L1 tripping, AAT logic: close behind the L2 discharge and post a letter;
F tripping this moment, L1 refuse branchs, the AAT logic: close and discharge behind the L2 and post a letter;
This moment, F refused branch, L1 tripping, the AAT logic: discharge and post a letter;
Three, F standby (P1, P2, M1, M2 all have pressure, and L1, L2 all have stream, and F divides the position, and L1, L2 close the position)
1.1.0 original state: P1, P2, M1, M2 all have pressure, and L1, L2 all have stream, and F divides the position, and L1, L2 close the position, the AAT logic: charging;
1.1.1 simulation L1 does not have stream, AAT logic: no change;
Simulation L2 does not have stream, AAT logic: no change;
1.1.2 simulation P1, M1 be decompression simultaneously, the AAT logic: alarm, the time-delay discharge is also posted a letter;
Simulation P2, M2 be decompression simultaneously, the AAT logic: alarm, and the time-delay discharge is also posted a letter;
1.1.3 simulation M1 decompression, AAT logic: only alarm;
1.1.4 simulation M2 decompression, AAT logic: only alarm;
1.1.5 simulation M1, M2 decompression, AAT logic: only alarm;
1.1.6 simulation M1 decompression, L1 does not have stream, the AAT logic: jump L1 and close F, recharge (normal logic);
Simulate L1 refuse branch, the AAT logic this moment: discharge and post a letter;
Simulate F refuse to close the AAT logic this moment: jump and close F behind the L1 and do not become, discharge and post a letter;
1.1.7 simulation M2 decompression, L2 does not have stream: the AAT logic: jump L2 and close F, recharge (normal logic);
Simulate L2 refuse branch, the AAT logic this moment: discharge and post a letter;
Simulate F refuse to close the AAT logic this moment: jump and close F behind the L2 and do not become, discharge and post a letter;
1.2.1 simulation B1 fault, L1 tripping (AAT open into), AAT logic: discharge and post a letter;
1.2.2 simulation B2 fault, L2 tripping (AAT open into), AAT logic: discharge and post a letter;
In sum, the utility model can Simulation Substation and the various methods of operation of electric power system under primary connection, can intuitively show and provide the circuit under the variety of way and the electric and position signalling of switch to backup auto-activating device, the abnormal conditions of simulation under the various methods of operation, as: the circuit dead electricity, bus loss of pressure, the main transformer fault, switch is stolen and is jumped, tripping or the like, automatically monitor and write down the course of action and the related data of backup auto-activating device simultaneously, automatically handle experimental data, draw conclusion (of pressure testing), whether correct with the action of checking backup auto-activating device, and the formation laboratory report, for device long-time running maintenance management produces factual evidence.
The utility model can be simulated the state and the relation of various logic each other of six above switches and three transformers, exceed cited mode of this device and project as the consumer networks primary connection, as enlarge interior bridge, particular forms such as sectionalized single busbar connection can be made amendment and can satisfy software according to customer requirements.After equipment comes into operation, make the debugging of backup auto-activating device more convenient, intuitive display as a result can reduce commissioning staff 2/3 debugging work load; Need not to carry out again primary equipment power failure simulation simultaneously, need not primary system fortune side and adjust, improve power supply reliability, avoid the terminal user to have a power failure.
Carry the three-phase test power supply in the machine, made things convenient for field adjustable.This device detects by national inspection center.Product meets " relay protection microcomputer type test unit technical conditions " (DL/T624-1997) standard.
Under the condition that need not the primary equipment full cut-off, finish all checks of automatic throw-in equipment of emergency power supply, and the warranty test mode needs with operation consistent; Device can be simulated the various methods of operation of electric system, be not only applicable to single internal bridge, be applicable to the expansion internal bridge simultaneously, can simulate any following any isolating switch in fortune side of leading and jump, refuse branch steathily, refuse to close and any main transformer failure condition, with the various performances of check automatic throw-in equipment of emergency power supply.Can simulate tens of kinds of phenomena of the failure under the available for different connection modes, comprise the various abnormal conditions that the prepared auto restart application places may occur substantially, can make comprehensively and judge accurately and differentiate the reliability of backup auto-activating device.
Tester of the present utility model, easy to operate performance is directly perceived: the integrated demonstration of menu and figure, simple to operate, course of action is intuitively transparent.I/O mode is flexible: input and output contact has idle contact and two kinds of forms of current potential.Multiple logical course: have the antilogical function, the logic of some backup auto-activating device is anti-, and promptly when junction closure, internal logic is 0, and when contact separated, internal logic was 1.The user only need can realize by menu setting.Wide application: the prepared auto restart system works situation of tens of kinds of abnormality under the multiple method of operation of energy survey formula.Friendly background interface: have microcomputer interface, all operations can carry out on microcomputer, and test result is stored and printout.Easy-to-connect: panel jack output is all adopted in all input and output, arranges by transformer station and electric power system main wiring diagram, comes into plain view, and greatly facilitates the wiring operation, avoids wiring error.Adaptive faculty is strong: adapt to multiple import and homemade protection and backup auto-activating device.The graphical operation interface, multiple primary system main electrical scheme is simulated in the control of MCU processor, and extendible main electrical scheme type; Various dead electricity and main transformer fault that the different fortune sides of simulation electric system primary connection may occur down, the action behavior and the duty of test backup auto-activating device correspondence are so that the commissioning staff makes comprehensively, assesses exactly prepared auto restart; Large-sized solor LCD, but the variation of visual display system main wiring diagram, primary system trend and each make and break contact state; Complete Chinese operation display interface and test findings, clear course of action, the result who intuitively intactly tests, writes down and show whole backup auto-activating device supports multiple modes of operation, and be convenient and swift; Parameters, experimental result are preserved automatically, and power down is not lost.
It is responsible for the concrete work of function interface, algorithm, analysis PC, and transmits various parameters to MCU.MCU handles after receiving corresponding data, and data are separately delivered on the corresponding port, receive the feedback signal of equipment under test simultaneously, these signals are delivered to PC, be responsible at last handling corresponding signal by PC, and on the interface, reflect timely.PC adopts the WINDOWS system, has good interactive function software, and is short and sweet.The MCU plate adopts the system of signal processor formation simple and high-efficient data acquisition and processing (DAP) fast, and reliability and the antijamming capability that mounting process has improved system greatly pasted in unique design and advanced showing; Hardware has house dog and guarantee that system can in time reset when unusual; Perfect software and hardware self check can also make system guarantee that when operation various parameters are excellent; Serial D/the A with 8 passages is adopted in digital-to-analog conversion, and conversion accuracy is 12, switching time about 10 μ s, 1 passage is used for the analog to digital conversion to outside input quantity; MCU is by RS232 mouth and host computer swap data.
Claims (3)
1, prepared auto restart comprehensive tester, link to each other with tested backup auto-activating device, comprise host computer, slave computer, it is characterized in that, it also comprises analogue amplifier, isolating switch mimic channel, transformer state artificial circuit, and slave computer links to each other by digital to analog converter with described analogue amplifier; Slave computer links to each other by I/O with described isolating switch mimic channel, transformer state artificial circuit; Slave computer, isolating switch mimic channel are provided with the data-interface with tested backup auto-activating device two-way exchange; Described analogue amplifier is provided with the electric current and voltage delivery outlet that connects tested backup auto-activating device, and the P1, the P2 delivery outlet that connect the isolating switch mimic channel; Described transformer state artificial circuit is provided with the interface that one-way transmission transformer state signal is given tested backup auto-activating device, and the B1, the B2 delivery outlet that connect the isolating switch mimic channel.
2, prepared auto restart comprehensive tester according to claim 1 is characterized in that, described isolating switch mimic channel comprises interconnective L1, L2 and F isolating switch, and the import of L1 and L2 isolating switch links to each other with P1, the P2 delivery outlet of analogue amplifier respectively; Establish the M1 point between L1 and F, the M1 point connects the B1 delivery outlet; Establish the M2 point between L2 and F, the M2 point connects the B2 delivery outlet; L1, L2 link to each other with tested backup auto-activating device by data line respectively with F isolating switch and M1, M2 point, and L1, L2 link to each other with slave computer by I/O respectively simultaneously with the F isolating switch.
3, prepared auto restart comprehensive tester according to claim 1, it is characterized in that, establish in the slave computer record according to host computer instruction send various running statuses and receive L1, L2 and F isolating switch in tested backup auto-activating device logic feedback, the isolating switch mimic channel the action feedback, will aforementioned each information storer by the program of host computer demonstration.
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| CNU2008202151453U CN201319052Y (en) | 2008-12-12 | 2008-12-12 | Auto-switch-on integrated tester |
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| CNU2008202151453U CN201319052Y (en) | 2008-12-12 | 2008-12-12 | Auto-switch-on integrated tester |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799500A (en) * | 2010-02-26 | 2010-08-11 | 上海新时达电气股份有限公司 | Fault generation system based on analog quantity |
| CN102768314A (en) * | 2012-07-05 | 2012-11-07 | 四川电力科学研究院 | Double-closed-loop testing device for intelligent substation and control method thereof |
| CN103077632A (en) * | 2012-11-22 | 2013-05-01 | 郑州万特电气有限公司 | Isolation disconnecting link electric operating mechanism training device |
| CN103077631A (en) * | 2012-11-22 | 2013-05-01 | 郑州万特电气有限公司 | Training device for three-phase circuit breaker spring operation mechanism |
| CN107402335A (en) * | 2017-07-17 | 2017-11-28 | 中铁电气化局集团有限公司 | A kind of offline calibration equipment of backup auto-activating device and method |
| CN109541353A (en) * | 2018-11-30 | 2019-03-29 | 广州供电局有限公司 | Power distribution automation detection system |
| CN114019362A (en) * | 2021-11-04 | 2022-02-08 | 华北电力大学 | Compound fault real-time simulation system based on relay protection tester |
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2008
- 2008-12-12 CN CNU2008202151453U patent/CN201319052Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799500A (en) * | 2010-02-26 | 2010-08-11 | 上海新时达电气股份有限公司 | Fault generation system based on analog quantity |
| CN102768314A (en) * | 2012-07-05 | 2012-11-07 | 四川电力科学研究院 | Double-closed-loop testing device for intelligent substation and control method thereof |
| CN102768314B (en) * | 2012-07-05 | 2014-09-24 | 四川电力科学研究院 | Double-closed-loop testing device for intelligent substation and control method thereof |
| CN103077632A (en) * | 2012-11-22 | 2013-05-01 | 郑州万特电气有限公司 | Isolation disconnecting link electric operating mechanism training device |
| CN103077631A (en) * | 2012-11-22 | 2013-05-01 | 郑州万特电气有限公司 | Training device for three-phase circuit breaker spring operation mechanism |
| CN103077632B (en) * | 2012-11-22 | 2015-01-21 | 郑州万特电气有限公司 | Isolation disconnecting link electric operating mechanism training device |
| CN107402335A (en) * | 2017-07-17 | 2017-11-28 | 中铁电气化局集团有限公司 | A kind of offline calibration equipment of backup auto-activating device and method |
| CN109541353A (en) * | 2018-11-30 | 2019-03-29 | 广州供电局有限公司 | Power distribution automation detection system |
| CN114019362A (en) * | 2021-11-04 | 2022-02-08 | 华北电力大学 | Compound fault real-time simulation system based on relay protection tester |
| CN114019362B (en) * | 2021-11-04 | 2024-04-19 | 华北电力大学 | Composite fault real-time simulation system based on relay protection tester |
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Owner name: JIANGSU ELECTRIC POWER CO. STATE ELECTRIC NET CROP Effective date: 20121019 |
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Effective date of registration: 20121019 Address after: 225009 Weiyang Road, Jiangsu, China, No. 179, No. Patentee after: Yangzhou Power Supply Company of Jiangsu Electric Power Company Patentee after: Jiangsu Electric Power Company Patentee after: State Grid Corporation of China Address before: 225009 Weiyang Road, Jiangsu, China, No. 179, No. Patentee before: Yangzhou Power Supply Company of Jiangsu Electric Power Company |
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