CN111929575A - High-voltage direct-current breaker handover test device, test system and test method - Google Patents
High-voltage direct-current breaker handover test device, test system and test method Download PDFInfo
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- CN111929575A CN111929575A CN202010959832.1A CN202010959832A CN111929575A CN 111929575 A CN111929575 A CN 111929575A CN 202010959832 A CN202010959832 A CN 202010959832A CN 111929575 A CN111929575 A CN 111929575A
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The invention provides a high-voltage direct-current circuit breaker handover test device, a test system and a test method, wherein the device comprises a main energy supply transformer voltage-withstanding module, a direct-current high-voltage generator and a cut-off waveform generating module; the voltage-resistant module of the main energy supply transformer comprises a direct-current isolating switch and a direct-current wall bushing; one end of the direct-current wall bushing is connected with the direct-current high-voltage generator through the direct-current isolating switch, and the other end of the direct-current wall bushing is connected with the high-voltage direct-current circuit breaker to be tested; the on-off waveform generation module comprises a drainage isolating switch, an oscillation discharge test circuit and a drainage wall bushing; one end of the drainage wall bushing is connected with the direct-current high-voltage generator through an oscillating discharge test circuit and a drainage isolating switch, and the other end of the drainage wall bushing is connected with the high-voltage direct-current circuit breaker to be tested.
Description
Technical Field
The invention relates to the technical field of high-voltage direct-current circuit breaker tests, in particular to a high-voltage direct-current circuit breaker handover test device, a test system and a test method.
Background
In recent years, the flexible direct-current transmission technology has rapidly developed by virtue of the advantages of independent and flexible power regulation capability, small harmonic content, no need of inter-station communication, capability of providing alternating-current voltage support for wind power plants and the like. Compared with an alternating current system, direct current fault current lacks a natural zero point, reliable on-off needs to be realized, a current zero point needs to be artificially created, and huge energy stored in inductive elements of the direct current system needs to be absorbed, so that the design difficulty of the direct current circuit breaker is greatly increased compared with the alternating current circuit breaker. The high-voltage direct-current circuit breaker is used as core equipment for cutting off fault current and plays an important role in guaranteeing stable operation of a flexible direct-current power grid.
The high-voltage direct-current circuit breaker belongs to the leading-edge technology of the field of power electronics, and the field connection special test mainly comprises a current breaking test and a main function direct-current voltage withstand test. The existing test method usually adopts a temporary self-assembly form, is difficult in equipment movement, complex in test, long in period, not beneficial to maintenance, poor in universality, difficult to calibrate the whole test system and not beneficial to realizing the standardization of test operation.
Disclosure of Invention
The invention aims to provide a high-voltage direct-current breaker handover test device, a test system and a test method, which are used for carrying out a current breaking test and a main function direct-current withstand voltage test of a high-voltage direct-current breaker.
In order to achieve the purpose, the high-voltage direct-current circuit breaker handover test device provided by the invention specifically comprises a main energy supply transformer voltage-withstanding module, a direct-current high-voltage generator and a switching-off waveform generating module; the voltage-resistant module of the main energy supply transformer comprises a direct-current isolating switch and a direct-current wall bushing; one end of the direct-current wall bushing is connected with the direct-current high-voltage generator through the direct-current isolating switch, and the other end of the direct-current wall bushing is connected with the high-voltage direct-current circuit breaker to be tested; the on-off waveform generation module comprises a drainage isolating switch, an oscillation discharge test circuit and a drainage wall bushing; one end of the drainage wall bushing is connected with the direct-current high-voltage generator through an oscillating discharge test circuit and a drainage isolating switch, and the other end of the drainage wall bushing is connected with the high-voltage direct-current circuit breaker to be tested.
In the handover test device for the high-voltage direct-current circuit breaker, preferably, the oscillation discharge test circuit comprises a pulse capacitor bank, a damping resistor, an adjustable reactance, a control switch, a power electronic switch and an anti-parallel diode; after the power electronic switch and the reverse parallel diode are connected in parallel, one side of the power electronic switch is connected with the drainage wall bushing, and the other side of the power electronic switch is connected with one end of the adjustable reactance; the other end of the adjustable reactance is connected with the direct-current high-voltage generator through the drainage isolating switch; the control switch is connected with the damping resistor in series, then is connected with the pulse capacitor bank in parallel, then is connected with the other end of the adjustable reactance at one side, and is connected with the direct-current high-voltage generator at the other side.
In the handover test device of the high-voltage direct-current circuit breaker, preferably, the voltage-withstanding module of the main energy supply transformer further includes a direct-current voltage divider, and the cut-off waveform generating module further includes a resistance-capacitance voltage divider; one end of the direct current voltage divider is connected between the direct current wall bushing and the direct current isolating switch and is used for dividing the collected test voltage and then providing the divided test voltage to an external measurement and control device through the other end of the direct current voltage divider; one end of the resistance-capacitance voltage divider is connected between the drainage wall bushing and the power electronic switch and used for dividing the collected test voltage and then providing the divided test voltage to an external measurement and control device through the other end of the resistance-capacitance voltage divider.
In above-mentioned high voltage direct current circuit breaker handing-over test device, preferred, the device still contains portable air cushion, fixed the placing on the portable air cushion high voltage direct current circuit breaker handing-over test device is used for removing high voltage direct current circuit breaker handing-over test device.
In the handover test device for the high-voltage direct-current circuit breaker, preferably, the handover test device for the high-voltage direct-current circuit breaker further comprises a temperature and humidity control module and a ventilation and illumination module; the temperature and humidity control module is used for controlling the temperature and humidity of the high-voltage direct-current circuit breaker handover test device according to preset test conditions; the ventilation and illumination module is used for controlling the light brightness and the gas circulation in the high-voltage direct-current circuit breaker handover test device according to preset parameters.
In above-mentioned high voltage direct current circuit breaker handing-over test device, preferred, high voltage direct current circuit breaker handing-over test device still contains insulating housing, insulating housing is used for with high voltage direct current circuit breaker handing-over test device is kept apart with external test equipment.
The invention also provides a test system comprising the high-voltage direct-current circuit breaker handover test device, and the system also comprises a main energy supply transformer and a measurement and control device; the main energy supply transformer is arranged between the direct-current wall bushing and the high-voltage direct-current circuit breaker to be tested and used for supplying energy to the high-voltage direct-current circuit breaker to be tested; the measurement and control device is used for controlling the on/off of each switch in the high-voltage direct-current circuit breaker handover test; and collecting current and/or voltage waveforms in the handover test process of the high-voltage direct-current circuit breaker.
In the test system, preferably, the high-voltage direct-current circuit breaker to be tested comprises a main branch, a transfer branch, an energy consumption branch and a control protection module; the main branch, the transfer branch and the energy consumption branch are connected in parallel; the main branch circuit is composed of a quick mechanical switch and is used for bearing the running current of the high-voltage direct-current circuit breaker; the transfer branch is composed of an energy storage capacitor, an oscillating inductor and a power electronic switch and is used for bearing the on-off current for a short time and establishing transient on-off voltage to realize current transfer; the energy consumption branch circuit is composed of a plurality of variable resistors and is used for inhibiting the on-off overvoltage of the high-voltage direct-current circuit breaker; establishing fault reverse blocking voltage and absorbing stored electric energy of the high-voltage direct-current circuit breaker; the control protection module is used for triggering and disconnecting the quick mechanical switch.
In the above test system, preferably, the measurement and control device includes a signal collector and a signal generator; the signal collector is used for collecting current and/or voltage waveforms in the handover test process of the direct current circuit breaker; the signal generator is connected with each switch and the direct-current high-voltage generator in the high-voltage direct-current circuit breaker handover test device through optical fibers and used for controlling the direct-current high-voltage generator to generate voltage or current required by the test; and controlling the closing or opening of each switch.
The invention also provides a test method suitable for the test system, which comprises the following steps: when a current on-off test of the high-voltage direct-current circuit breaker is carried out, a first control signal is generated to control the conduction isolating switch to be closed, the conduction isolating switch to be opened and closed and the power electronic switch to be opened, so that the direct-current high-voltage generator charges the pulse capacitor bank; when the pulse capacitor bank is charged to a preset degree, generating a second control signal to control the conduction isolating switch to be switched off, the control switch to be switched off and the power electronic switch to be switched on, so that the pulse capacitor bank generates a simulated short-circuit fault current through the adjustable reactance, and the short-circuit fault current is provided to the high-voltage direct-current circuit breaker to be tested through the conduction through-wall bushing; when the current on-off test of the high-voltage direct-current circuit breaker is finished, a third control signal is generated to control the conduction isolating switch to be switched off, the conduction isolating switch to be switched on and switched off and the power electronic switch to be switched off, so that the damping resistor is emptied for the pulse capacitor bank to store electric energy.
The invention also provides a test method suitable for the test system, which comprises the following steps: when a main energy supply variable direct current withstand voltage test is carried out, a fourth control signal is generated to control the drainage isolating switch to be switched off and the direct current isolating switch to be switched on; and controlling the direct-current high-voltage generator to output preset direct-current voltage according to a preset control instruction, and providing the preset direct-current voltage to the main energy supply transformer through the direct-current wall bushing for insulation state testing.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method when executing the computer program.
The present invention also provides a computer-readable storage medium storing a computer program for executing the above method.
The invention has the beneficial technical effects that: the convenience and maintainability of special test of high-voltage direct-current circuit breaker field handover are improved, the standardization of test operation is realized, whether the high-voltage direct-current circuit breaker meets the commissioning requirement is judged, and the safe and stable operation of the high-voltage direct-current circuit breaker is guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a handover testing apparatus for a high-voltage dc circuit breaker according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating an application of a handover testing apparatus for a high-voltage dc circuit breaker according to an embodiment of the present invention;
fig. 3 and 4 are schematic structural diagrams of a testing system according to an embodiment of the present invention;
FIGS. 5 and 6 are schematic flow charts of the assay method provided in one embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Reference numerals:
1-a direct current high voltage generator;
2-a direct current isolating switch;
3-direct current wall bushing;
4-a drainage isolating switch;
5-a pulse capacitor bank;
6-damping resistance;
7-control switch;
8-adjustable reactance;
9-power electronic switches;
10-antiparallel diode;
11-drainage wall bushing;
13-full inflatable movable air cushion;
14-a ground port;
15-high voltage dc circuit breaker;
16-main branch;
17-a transfer branch;
18-energy consumption branch;
19-an oscillation module;
20-a main energy supply transformer;
21-high voltage dc breaker cradle;
22-a dc voltage divider;
23-resistor-capacitor voltage divider
24-a measurement and control device.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, unless otherwise specified, the embodiments and features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
Additionally, the steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions and, although a logical order is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than here.
Referring to fig. 1, the handover test apparatus for a high-voltage dc circuit breaker provided by the present invention specifically includes a voltage withstanding module of a main energy supply transformer, a dc high-voltage generator 1, and a switching waveform generating module; the voltage-resistant module of the main energy supply transformer comprises a direct-current isolating switch 2 and a direct-current wall bushing 3; one end of the direct current wall bushing 1 is connected with the direct current high voltage generator 1 through the direct current isolating switch 2, and the other end of the direct current wall bushing 3 is connected with a high voltage direct current breaker to be tested; the on-off waveform generation module comprises a drainage isolating switch 4, an oscillation discharge test circuit and a drainage wall bushing 11; one end of the drainage wall bushing 11 is connected with the direct-current high-voltage generator 1 through the oscillation discharge test circuit and the drainage isolating switch 4, and the other end of the drainage wall bushing is connected with the high-voltage direct-current circuit breaker to be tested. In the embodiment, the high-voltage direct-current circuit breaker handover test device is used as a carrier of high-voltage output of a test system; the on-off waveform generating module is used for generating on-off current required by a test, and the main energy supply transformer voltage-withstanding module is used for finishing direct-current voltage withstanding of a main energy supply transformer of the high-voltage direct-current circuit breaker; in actual work, the direct-current high-voltage generator 1 is mainly used for generating direct-current voltage, and the direct-current isolating switch is used for isolating the voltage during a direct-current breaker current breaking test; the direct-current wall bushing is fixed on the high-voltage direct-current circuit breaker handover test device and can bear direct-current voltage generated by the high-voltage direct-current circuit breaker. The drainage isolating switch 4 is used for isolating voltage during a voltage withstand test of the main energy supply transformer; the oscillation discharge test circuit is used for generating test current; and the drainage wall bushing 11 is used for leading out test current generated by the integrated workstation. Therefore, two sets of tests of direct current withstand voltage and rated current breaking test for the whole high-voltage direct current circuit breaker are needed for the main energy supply transformer of the high-voltage direct current circuit breaker.
In the above embodiment, the oscillation discharge test circuit includes a pulse capacitor bank 5, a damping resistor 6, an adjustable reactance 8, a control switch 7, a power electronic switch 9 and an anti-parallel diode 10; after the power electronic switch 9 and the reverse parallel diode 10 are connected in parallel, one side of the power electronic switch is connected with the drainage wall bushing 11, and the other side of the power electronic switch is connected with one end of the adjustable reactance 8; the other end of the adjustable reactance 8 is connected with the direct-current high-voltage generator 1 through the drainage isolating switch 11; the control switch 7 and the damping resistor 6 are connected in series and then connected in parallel with the pulse capacitor bank 5, one side of the control switch is connected with the other end of the adjustable reactance 8, and the other side of the control switch is connected with the direct-current high-voltage generator 1. The oscillating discharge test circuit has the following working procedures in the process of carrying out a current on-off test: before the test, the direct current disconnecting switch 2 is disconnected, the drainage disconnecting switch 4 is closed, meanwhile, a main branch quick mechanical switch in an external high-voltage direct current circuit breaker to be tested is in a closed state, a main branch semiconductor unit is in a conducting state, then the measurement and control device sends a control signal to start charging the pulse capacitor bank 5, the drainage disconnecting switch 4 is disconnected after the charging is completed, the test loop is isolated from a charging power supply, after being triggered by the power electronic switch 9, simulated short-circuit fault current is injected into the high-voltage direct current circuit breaker to be tested, then the test is completed according to the disconnection time sequence of the direct current circuit breaker, and meanwhile, the measurement and control device records current and voltage waveforms in.
Referring to fig. 2, the voltage-withstanding module of the main energy supply transformer further includes a dc voltage divider 22, and the on-off waveform generating module further includes a resistance-capacitance voltage divider 23; one end of the direct current voltage divider 22 is connected between the direct current wall bushing 3 and the direct current isolating switch 2, and is used for dividing the collected test voltage and then providing the divided test voltage to an external measurement and control device 24 through the other end of the direct current voltage divider 22; one end of the resistance-capacitance voltage divider 23 is connected between the drainage wall bushing 11 and the power electronic switch 9, and is used for dividing the collected test voltage and then providing the divided test voltage to an external measurement and control device 24 through the other end of the resistance-capacitance voltage divider 23. In another embodiment of the present invention, the apparatus may further include a movable air cushion 13, on which the high voltage dc circuit breaker handover test apparatus is fixedly disposed, for moving the high voltage dc circuit breaker handover test apparatus; it is worth mentioning that, in this embodiment, a ground port 14 is further included, and the ground port 14 is used for grounding the handover test apparatus of the high voltage dc circuit breaker.
Based on the embodiment, in actual work, before the high-voltage direct-current circuit breaker handover test device is tested, all components are in a state to be tested, and all components are normally communicated;
in the current breaking test process: before a test, a direct-current isolating switch is switched off, a current-guiding isolating switch is switched on, a main branch quick mechanical switch of a direct-current circuit breaker to be tested is in a closed state, a main branch semiconductor unit is in a conducting state, then a pulse capacitor bank is charged, after the charging is finished, the isolation of a test loop and a charging power supply is realized, after the triggering of a power electronic switch, a simulated short-circuit fault current is injected into the direct-current circuit breaker, and then the test is finished according to the on-off time sequence of the direct-current circuit breaker;
in the main energy supply variable direct current withstand voltage test process: before the test, the drainage isolating switch is switched off, the direct-current isolating switch is switched on, and according to a preset relevant standard, the direct-current high-voltage generator is controlled by the measurement and control device to output a specific direct-current voltage which is applied to a tested object so as to judge whether the main energy supply transformer is in an insulation state.
In an embodiment of the invention, the high-voltage direct-current circuit breaker handover test device further comprises a temperature and humidity control module and a ventilation and illumination module; the temperature and humidity control module is used for controlling the temperature and humidity of the high-voltage direct-current circuit breaker handover test device according to preset test conditions; the ventilation and illumination module is used for controlling the light brightness and the gas circulation in the high-voltage direct-current circuit breaker handover test device according to preset parameters. Further, the high-voltage direct current circuit breaker handover test device can further comprise an insulating shell, and the insulating shell is used for isolating the high-voltage direct current circuit breaker handover test device from external test equipment.
Referring to fig. 3, the invention further provides a testing system including the handover testing device of the high-voltage dc circuit breaker, the system further includes a main energy supply transformer 20 and a measurement and control device 24; the main energy supply transformer is arranged between the direct-current wall bushing 3 and the high-voltage direct-current circuit breaker 15 to be tested and used for supplying energy to the high-voltage direct-current circuit breaker 15 to be tested; the measurement and control device 24 is used for controlling the on/off of each switch in the high-voltage direct-current circuit breaker handover test; and collecting current and/or voltage waveforms in the handover test process of the high-voltage direct-current circuit breaker. The high-voltage dc circuit breaker handover testing apparatus has been described in detail in the foregoing embodiments, and the meaning of each component in the high-voltage dc circuit breaker handover testing apparatus in fig. 3 is described with reference to fig. 2 and related embodiments, and thus, detailed description thereof is omitted.
Please refer to fig. 4, which is a schematic diagram of a connection structure of a test system for performing a current breaking test according to the present invention; the structure does not need to comprise a main energy supply transformer 20, and only the high-voltage direct-current circuit breaker 15 to be tested is communicated with the drainage wall bushing 11 and the grounding wire 14 of the high-voltage direct-current circuit breaker handover test device, so that the detailed description is omitted.
Referring to fig. 4 again, in an embodiment of the present invention, the to-be-tested high-voltage dc circuit breaker 15 includes a main branch 16, a transfer branch 17, an energy consumption branch 18, and a control protection module; the main branch 16, the transfer branch 17 and the energy consumption branch 18 are connected in parallel; wherein the main branch circuit 16 is composed of a fast mechanical switch and is used for carrying the operating current of the high-voltage direct-current circuit breaker; the transfer branch 17 is composed of an energy storage capacitor, an oscillation inductor 19 and a power electronic switch, and is used for bearing the on-off current for a short time and establishing transient on-off voltage to realize current transfer; the energy consumption branch circuit 18 is composed of a plurality of variable resistors and is used for inhibiting the switching-on and switching-off overvoltage of the high-voltage direct-current circuit breaker; establishing fault reverse blocking voltage and absorbing stored electric energy of the high-voltage direct-current circuit breaker; the control protection module is used for triggering and disconnecting the quick mechanical switch. In actual work, when the main branch quick mechanical switch runs normally, the main branch quick mechanical switch flows through; receiving a tripping command, breaking and arcing the main branch quick mechanical switch contact; after the contact is opened to a certain opening distance, the LC oscillating circuit branch is conducted, and high-frequency reverse current is generated and superposed on the mechanical switch to form an artificial current zero point, and the rapid mechanical switch extinguishes the electric arc by utilizing the moment; when the recovery voltage at the two ends of the quick mechanical switch rises to a certain value, the energy absorption device acts, and the current is transferred to the energy consumption branch; the energy absorbing device limits the current to zero and the disconnection is complete.
In one embodiment of the invention, the main energy supply transformer comprises a primary conductive bar, a silicon rubber sleeve, an upper shielding ring, a lower shielding ring and a tank type base; the primary conductive bar is placed in the silicon rubber sleeve and used for providing energy supply; the upper shielding ring and the lower shielding ring are respectively arranged at the upper pipe orifice and the lower pipe orifice of the silicon rubber sleeve and are used for homogenizing an electric field around the silicon rubber sleeve; be equipped with high voltage coil and low voltage coil in the pot-type base, wherein high voltage coil (pot-type base, the internal portion establishes high low voltage coil, and high voltage coil copper line is fixed in the urceolus with epoxy, the suit in the iron core post to support in the bottom plate through the insulating part, low voltage coil suit is on the iron core post, and a overcoat opening low pressure shielding section of thick bamboo, high low voltage coil are through SF6 gas insulation between, and are the concentric arrangement).
In an embodiment of the invention, the measurement and control device comprises a signal collector and a signal generator; the signal collector is used for collecting current and/or voltage waveforms in the handover test process of the direct current circuit breaker; the signal generator is connected with each switch and the direct-current high-voltage generator in the high-voltage direct-current circuit breaker handover test device through optical fibers and used for controlling the direct-current high-voltage generator to generate voltage or current required by the test; and controlling the closing or opening of each switch. The specific connection mode and the collection mode of the signal collector have been described in the above embodiments, and are not described in detail herein; in the actual work, the signal generator mainly realizes that each switch element completes the test according to the preset time sequence by external instructions or preset instructions, logics and the like, and the test can be realized by the prior art, so that the invention is not detailed.
Referring to fig. 5, the present invention further provides a testing method suitable for the testing system, the method comprising:
s501, when a current on-off test of the high-voltage direct-current circuit breaker is carried out, a first control signal is generated to control the conduction isolating switch to be closed, the conduction isolating switch to be opened and closed and the power electronic switch to be opened, so that the direct-current high-voltage generator charges the pulse capacitor bank;
s502, when the pulse capacitor bank is charged to a preset degree, generating a second control signal to control the conduction isolating switch to be switched off, the control switch to be switched off and the power electronic switch to be switched on, so that the pulse capacitor bank generates a simulated short-circuit fault current through the adjustable reactance, and the short-circuit fault current is provided to the high-voltage direct-current circuit breaker to be tested through the conduction wall bushing;
s503, when the current on-off test of the high-voltage direct-current circuit breaker is finished, generating a third control signal to control the conduction isolating switch to be switched off, the conduction isolating switch to be switched on and switched off and the power electronic switch to be switched off, and enabling the damping resistor to empty the pulse capacitor bank to store electric energy.
In practical operation, when the above embodiments are applied to a test system, the overall principle is as follows: before a test, a direct-current isolating switch is switched off, a current-guiding isolating switch is switched on, a main branch quick mechanical switch of a direct-current circuit breaker to be tested is in a closed state, a main branch semiconductor unit is in a conducting state, then a pulse capacitor bank is charged, after the charging is finished, the isolation of a test loop and a charging power supply is realized, after the triggering of a power electronic switch, a simulated short-circuit fault current is injected into the direct-current circuit breaker, and then the test is finished according to the on-off time sequence of the direct-current circuit breaker;
referring to fig. 6, the present invention further provides a testing method suitable for the testing system, the method comprising:
s601, when a main energy supply variable direct current withstand voltage test is carried out, a fourth control signal is generated to control the drainage isolating switch to be switched off and the direct current isolating switch to be switched on;
and S602, controlling the direct-current high-voltage generator to output a preset direct-current voltage according to a preset control instruction, and providing the preset direct-current voltage to the main energy supply transformer through the direct-current wall bushing for insulation state testing.
In practical operation, when the above embodiments are applied to a test system, the overall principle is as follows: before the test, the drainage isolating switch is switched off, the direct-current isolating switch is switched on, and according to a preset relevant standard, the direct-current high-voltage generator is controlled by the measurement and control device to output a specific direct-current voltage which is applied to a tested object so as to judge whether the main energy supply transformer is in an insulation state.
The invention has the beneficial technical effects that: the convenience and maintainability of special test of high-voltage direct-current circuit breaker field handover are improved, the standardization of test operation is realized, whether the high-voltage direct-current circuit breaker meets the commissioning requirement is judged, and the safe and stable operation of the high-voltage direct-current circuit breaker is guaranteed.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method when executing the computer program.
The present invention also provides a computer-readable storage medium storing a computer program for executing the above method.
As shown in fig. 7, the electronic device 600 may further include: communication module 110, input unit 120, audio processing unit 130, display 160, power supply 170. It is noted that the electronic device 600 does not necessarily include all of the components shown in fig. 7; furthermore, the electronic device 600 may also comprise components not shown in fig. 7, which may be referred to in the prior art.
As shown in fig. 7, the central processor 100, sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device, the central processor 100 receiving input and controlling the operation of the various components of the electronic device 600.
The memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. The information relating to the failure may be stored, and a program for executing the information may be stored. And the central processing unit 100 may execute the program stored in the memory 140 to realize information storage or processing, etc.
The input unit 120 provides input to the cpu 100. The input unit 120 is, for example, a key or a touch input device. The power supply 170 is used to provide power to the electronic device 600. The display 160 is used to display an object to be displayed, such as an image or a character. The display may be, for example, an LCD display, but is not limited thereto.
The memory 140 may be a solid state memory such as Read Only Memory (ROM), Random Access Memory (RAM), a SIM card, or the like. There may also be a memory that holds information even when power is off, can be selectively erased, and is provided with more data, an example of which is sometimes called an EPROM or the like. The memory 140 may also be some other type of device. Memory 140 includes buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application/function storage section 142, and the application/function storage section 142 is used to store application programs and function programs or a flow for executing the operation of the electronic device 600 by the central processing unit 100.
The memory 140 may also include a data store 143, the data store 143 for storing data, such as contacts, digital data, pictures, sounds, and/or any other data used by the electronic device. The driver storage portion 144 of the memory 140 may include various drivers of the electronic device for communication functions and/or for performing other functions of the electronic device (e.g., messaging application, address book application, etc.).
The communication module 110 is a transmitter/receiver 110 that transmits and receives signals via an antenna 111. The communication module (transmitter/receiver) 110 is coupled to the central processor 100 to provide an input signal and receive an output signal, which may be the same as in the case of a conventional mobile communication terminal.
Based on different communication technologies, a plurality of communication modules 110, such as a cellular network module, a bluetooth module, and/or a wireless local area network module, may be provided in the same electronic device. The communication module (transmitter/receiver) 110 is also coupled to a speaker 131 and a microphone 132 via an audio processor 130 to provide audio output via the speaker 131 and receive audio input from the microphone 132 to implement general telecommunications functions. Audio processor 130 may include any suitable buffers, decoders, amplifiers and so forth. In addition, an audio processor 130 is also coupled to the central processor 100, so that recording on the local can be enabled through a microphone 132, and so that sound stored on the local can be played through a speaker 131.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (13)
1. The high-voltage direct-current circuit breaker handover test device is characterized by comprising a main energy supply transformer voltage-withstanding module, a direct-current high-voltage generator and a switching-off waveform generating module;
the voltage-resistant module of the main energy supply transformer comprises a direct-current isolating switch and a direct-current wall bushing; one end of the direct-current wall bushing is connected with the direct-current high-voltage generator through the direct-current isolating switch, and the other end of the direct-current wall bushing is connected with the high-voltage direct-current circuit breaker to be tested;
the on-off waveform generation module comprises a drainage isolating switch, an oscillation discharge test circuit and a drainage wall bushing; one end of the drainage wall bushing is connected with the direct-current high-voltage generator through an oscillating discharge test circuit and a drainage isolating switch, and the other end of the drainage wall bushing is connected with the high-voltage direct-current circuit breaker to be tested.
2. The high-voltage direct current circuit breaker handover test device according to claim 1, wherein the oscillating discharge test circuit comprises a pulse capacitor bank, a damping resistor, an adjustable reactance, a control switch, a power electronic switch and an anti-parallel diode;
after the power electronic switch and the reverse parallel diode are connected in parallel, one side of the power electronic switch is connected with the drainage wall bushing, and the other side of the power electronic switch is connected with one end of the adjustable reactance;
the other end of the adjustable reactance is connected with the direct-current high-voltage generator through the drainage isolating switch;
the control switch is connected with the damping resistor in series, then is connected with the pulse capacitor bank in parallel, then is connected with the other end of the adjustable reactance at one side, and is connected with the direct-current high-voltage generator at the other side.
3. The apparatus of claim 2, wherein the main power transformer voltage withstand module further comprises a dc voltage divider, and the cut-off waveform generating module further comprises a resistance-capacitance voltage divider;
one end of the direct current voltage divider is connected between the direct current wall bushing and the direct current isolating switch and is used for dividing the collected test voltage and then providing the divided test voltage to an external measurement and control device through the other end of the direct current voltage divider;
one end of the resistance-capacitance voltage divider is connected between the drainage wall bushing and the power electronic switch and used for dividing the collected test voltage and then providing the divided test voltage to an external measurement and control device through the other end of the resistance-capacitance voltage divider.
4. The HVDC breaker handover test apparatus of claim 1, further comprising a movable air cushion, wherein the HVDC breaker handover test apparatus is fixedly disposed on the movable air cushion for moving the HVDC breaker handover test apparatus.
5. The high-voltage direct current circuit breaker handover test device according to claim 1, further comprising a temperature and humidity control module and a ventilation and illumination module;
the temperature and humidity control module is used for controlling the temperature and humidity of the high-voltage direct-current circuit breaker handover test device according to preset test conditions;
the ventilation and illumination module is used for controlling the light brightness and the gas circulation in the high-voltage direct-current circuit breaker handover test device according to preset parameters.
6. The HVDC breaker handover test apparatus of claim 1, further comprising an insulating housing for isolating the HVDC breaker handover test apparatus from external test equipment.
7. A test system comprising the handover test device for the high voltage direct current circuit breaker according to any one of claims 2 to 3, wherein the system further comprises a main energy supply transformer and a measurement and control device;
the main energy supply transformer is arranged between the direct-current wall bushing and the high-voltage direct-current circuit breaker to be tested and used for supplying energy to the high-voltage direct-current circuit breaker to be tested;
the measurement and control device is used for controlling the on/off of each switch in the high-voltage direct-current circuit breaker handover test; and collecting current and/or voltage waveforms in the handover test process of the high-voltage direct-current circuit breaker.
8. The test system according to claim 7, wherein the high-voltage direct-current circuit breaker to be tested comprises a main branch, a transfer branch, an energy consumption branch and a control protection module;
the main branch, the transfer branch and the energy consumption branch are connected in parallel;
the main branch circuit is composed of a quick mechanical switch and is used for bearing the running current of the high-voltage direct-current circuit breaker; the transfer branch is composed of an energy storage capacitor, an oscillating inductor and a power electronic switch and is used for bearing the on-off current for a short time and establishing transient on-off voltage to realize current transfer; the energy consumption branch circuit is composed of a plurality of variable resistors and is used for inhibiting the on-off overvoltage of the high-voltage direct-current circuit breaker; establishing fault reverse blocking voltage and absorbing stored electric energy of the high-voltage direct-current circuit breaker; the control protection module is used for triggering and disconnecting the quick mechanical switch.
9. The testing system of claim 7, wherein the measurement and control device comprises a signal collector and a signal generator;
the signal collector is used for collecting current and/or voltage waveforms in the handover test process of the direct current circuit breaker;
the signal generator is connected with each switch and the direct-current high-voltage generator in the high-voltage direct-current circuit breaker handover test device through optical fibers and used for controlling the direct-current high-voltage generator to generate voltage or current required by the test; and controlling the closing or opening of each switch.
10. A testing method adapted for use with the testing system of claim 7, said method comprising:
when a current on-off test of the high-voltage direct-current circuit breaker is carried out, a first control signal is generated to control the conduction isolating switch to be closed, the conduction isolating switch to be opened and closed and the power electronic switch to be opened, so that the direct-current high-voltage generator charges the pulse capacitor bank;
when the pulse capacitor bank is charged to a preset degree, generating a second control signal to control the conduction isolating switch to be switched off, the control switch to be switched off and the power electronic switch to be switched on, so that the pulse capacitor bank generates a simulated short-circuit fault current through the adjustable reactance, and the short-circuit fault current is provided to the high-voltage direct-current circuit breaker to be tested through the conduction through-wall bushing;
when the current on-off test of the high-voltage direct-current circuit breaker is finished, a third control signal is generated to control the conduction isolating switch to be switched off, the conduction isolating switch to be switched on and switched off and the power electronic switch to be switched off, so that the damping resistor is emptied for the pulse capacitor bank to store electric energy.
11. A testing method adapted for use with the testing system of claim 7, said method comprising:
when a main energy supply variable direct current withstand voltage test is carried out, a fourth control signal is generated to control the drainage isolating switch to be switched off and the direct current isolating switch to be switched on;
and controlling the direct-current high-voltage generator to output preset direct-current voltage according to a preset control instruction, and providing the preset direct-current voltage to the main energy supply transformer through the direct-current wall bushing for insulation state testing.
12. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 10 to 11 when executing the computer program.
13. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 10 to 11.
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| CN202010959832.1A CN111929575A (en) | 2020-09-14 | 2020-09-14 | High-voltage direct-current breaker handover test device, test system and test method |
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| CN202010959832.1A CN111929575A (en) | 2020-09-14 | 2020-09-14 | High-voltage direct-current breaker handover test device, test system and test method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117269679A (en) * | 2023-08-21 | 2023-12-22 | 国网江苏省电力有限公司南京供电分公司 | Method for judging external insulation state of high-voltage circuit breaker based on fundamental wave electric field duty ratio |
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2020
- 2020-09-14 CN CN202010959832.1A patent/CN111929575A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117269679A (en) * | 2023-08-21 | 2023-12-22 | 国网江苏省电力有限公司南京供电分公司 | Method for judging external insulation state of high-voltage circuit breaker based on fundamental wave electric field duty ratio |
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