CN107462801A - A kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device - Google Patents
A kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device Download PDFInfo
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- CN107462801A CN107462801A CN201710689964.5A CN201710689964A CN107462801A CN 107462801 A CN107462801 A CN 107462801A CN 201710689964 A CN201710689964 A CN 201710689964A CN 107462801 A CN107462801 A CN 107462801A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The present invention relates to a kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device, its technical characterstic is：Hookup including shell and its inside, the hookup include Test Information input module, test voltage source module, voltage transformation module, test loop module, test loop handover module, zero-sequence current output module, protection device, experimental data processing module and experimental rig programmable control module.The present invention need to only be set at the trial starts voltage definite value by capacity current during pilot system singlephase earth fault, and Small Electric Current Earthing And Routing Device, you can carries out from dynamic test, and generates test report.
Description
Technical field
The invention belongs to technical field of relay protection, especially a kind of portable Small Electric Current Earthing And Routing Device is tried with dynamic model
Experiment device.
Background technology
35kV following systems in China are generally run using small current neutral grounding mode.Relay protected operation regulatory requirements are in small electricity
When single-phase fault occurs for streaming system, small current earthing wire-selecting protection device fast and reliable can act.For lifting earthing wire-selecting dress
Reliability is put, State Grid Corporation of China company standard Q/GDW 369-2009 suggest entering protection device in examination and regular maintenance
Row dynamic simulation test, the hookup are as shown in Figure 1.According to the actual capacity current size configuration loop parameter of system, apply typical case
False voltage simulated failure electric current, the experiment can effectively examine sensitivity, the reliability of line-selected earthing device, but actually should
Problems be present：
(1) checking and accepting, in debugging process, work on the spot environment is complicated, is not easy to overlap test loop described in Fig. 3；(2)
It is Open add-on trial system that scene, which overlaps the test loop, it is difficult to excludes complicated electromagnetic signal interference in transformer station；(3) test back
Electric capacity, resistance, inductance need to be adjusted according to by the actual capacity current of test system in road, therefore are all needed before field test every time
Prepare the test element of parameter burden requirement, intricate operation is complicated.(4) test when need to will switch plug Zi (i=1,2 ...
12) switched in, simulate the earth fault of different circuits；When switching to plug Zm, analog bus failure.On every circuit
Need to simulate neutral ground, earth-free, three groups of experiments of high resistance ground therefore at least need to carry out 39 minor loop switchings, work
It is cumbersome；(5) at frequent switching test loop, it is possible to cause current loop to open a way, potential safety hazard be present.(6) need to simulate
Each bar circuit is under different earthing modes, when applying the false voltage of different amplitudes, harmonic content, Small Electric Current Earthing And Routing Device
Reliability, content of the test is many, test data statistics, processing workload it is huge.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide it is a kind of it is reasonable in design, result of the test reliability is high,
Operating efficiency is high and saves the portable Small Electric Current Earthing And Routing Device dynamic simulation test device of a large amount of manpower and materials.
The present invention solves its technical problem and takes following technical scheme to realize：
A kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device, include the experiment electricity of shell and its inside
Road, the hookup include Test Information input module, test voltage source module, voltage transformation module, test loop module,
Test loop handover module, zero-sequence current output module, protection device, experimental data processing module and experimental rig programmable control
Molding block；User is exported to the test voltage source module by the system information input module by systematic parameter is tested, should
The output end of test voltage source module is connected by voltage transformation module with the protection device, by test voltage source mould
The output voltage of block is exported to the residual voltage AM access module of the protection device after carrying out voltage transformation；The test voltage source
The output end of module also successively with test loop module, test loop handover module, zero-sequence current output module and protection device
It is connected, the output voltage of the test voltage source module is put on after the module of test loop by test loop handover module
Selection experiment scheme, and the zero-sequence current that zero-sequence current is accessed to the protection device is opened into terminal；The protection device it is defeated
Go out end with the experimental data processing module to be connected, the output end of the experimental data processing module is connected with user；It will protect
Shield the result of the action is exported in the form of soft message to the experimental data processing module, is exported after forming test report for user；
The output end of the experimental rig programmable control module respectively with system information input module, test voltage source module, voltage
Conversion module, test loop handover module are connected with experimental data processing module.
Moreover, the test loop handover module is automatic switch, can be controlled according to experimental rig programmable control module
Automatic conducting corresponding circuit.
Moreover, the shell is encapsulated using sandwiched metal.
The advantages and positive effects of the present invention are：
1st, the present invention is internally integrated Test Information input module, test voltage source module, voltage transformation module, test loop
Module, test loop handover module, zero-sequence current output module, protection device, experimental data processing module and PLC technology
Module；It need to only be set by capacity current during pilot system singlephase earth fault, and Small Electric Current Earthing And Routing Device during experiment
Start voltage definite value, you can carry out from dynamic test, and generate test report.The experimental rig result of the test reliability is high, can pole
Field test operating efficiency is lifted in big degree, strengthens field test security management and control, saves a large amount of manpower and materials.
2nd, the present invention uses modularized design thinking, is encapsulated using sandwiched metal shell, can effectively shield external electromagnetic
Interference signal.
3rd, the present invention sets up dynamic simulation test loop automatic switching module, and device experiment loop parameter benchmark value carries out whole
It is fixed, it is not required to change tank capacitance again in test；By the cooperation of test loop voltage source and power conversion module, to different appearances
Property earth current small current neutral grounding system carry out line selection apparatus functional performance experiment.
4th, the present invention be can be achieved to automatically process test data, and Small Electric Current Earthing And Routing Device reliability is commented automatically
Estimate, and generate laboratory report.
5th, the present invention uses modularized design thinking, is encapsulated using sandwiched metal shell, can effectively shield live electromagnetism
The interference of signal.Meanwhile the device avoids the tedious work that loop is built at scene, it need to only input by pilot system single-phase fault
Capacity current and protection device zero sequence start voltage during ground connection, you can carry out dynamic simulation test automatically.It is provided simultaneously with test data
Function is managed, the reliability assessment to protection device can be automatically performed, and generate test report.The device largely improves
Field test operating efficiency, improves the reliability of result of the test, while strengthens site safety management.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the present invention；
Fig. 2 is the loop switch module wiring schematic diagram of the present invention；
Fig. 3 is functional performance test schematic in background technology of the invention.
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with accompanying drawing：
A kind of portable Small Electric Current Earthing And Routing Device with dynamic simulation test device as depicted in figs. 1 and 2, including shell and its
Internal hookup, the hookup include Test Information input module 1, test voltage source module 2, voltage transformation module
3rd, test loop module 4, test loop handover module 5, zero-sequence current output module 6, protection device 7, experimental data processing mould
Block 8 and experimental rig programmable control module 9；User by the system information input module will be tested systematic parameter export to
The test voltage source module, the output end of the test voltage source module are connected by voltage transformation module with the protection device
Connect, output to the residual voltage of the protection device connects after the output voltage of the test voltage source module is carried out into voltage transformation
Enter module；The output end of the test voltage source module is also electric with test loop module, test loop handover module, zero sequence successively
Stream output module is connected with protection device, after the output voltage of the test voltage source module is put on into test loop module
By test loop handover module Selection experiment scheme, and the zero-sequence current that zero-sequence current is accessed to the protection device is opened into end
Son；The output end of the protection device is connected with the experimental data processing module, the output of the experimental data processing module
End is connected with user；Protection act result is exported to the experimental data processing module in the form of soft message, forms examination
Exported after testing report for user；The output end of the experimental rig programmable control module respectively with system information input module,
Test voltage source module, voltage transformation module, test loop handover module are connected with experimental data processing module.
In the present embodiment, the test loop handover module is automatic switch, can be according to experimental rig PLC technology
The automatic conducting corresponding circuit of module control.
In the present embodiment, the portable Small Electric Current Earthing And Routing Device dynamic simulation test platform is designed using full encapsulation, outside
Shell is encapsulated using sandwiched metal shell, can effectively shield interference of the live interference signal to test loop.
The present invention operation principle be：
The test loop of the portable dynamic simulation test device of the present invention is using capacity current during system single-phase earthing as IC0, experiment
Voltage source is that Ucc adjusts relevant capacitor parameter.Arc suppression coil L and grounding resistance R possess continuously adjustabe function in test loop, full
Sufficient 0.5IC0≤IL≤1.5IC0, 0.5IC0≤IR≤1.1IC0In the range of continuously adjustabe.
The capacitance of different system is different, therefore fault current is different.For simulated failure when the total inflow of electrical secondary system
It is identical when electric current is with physical fault, need during using conventional method to adjust capacitance in analog loopback, it is troublesome in poeration.
It need to only be set and the present invention use following methods, during experiment electric by capacitive during pilot system singlephase earth fault
Stream, and Small Electric Current Earthing And Routing Device start voltage definite value, you can carry out from dynamic test.
The input system rated voltage Un in system information input module 1, during Systems Theory single phase metal earth fault
Capacity current IC0, zero sequence current mutual inductor no-load voltage ratio k1, zero sequential potential transformer no-load voltage ratio k2.
Therefore, simulate in zero sequence current output module 6 and export zero-sequence current sum total Icc=IC0/k1, therefore experimental voltage
Source module 2 exports to the voltage of test loop module 4 and should be Ucc=Icc/wC=IC0/ (k1*wC).
For isolated neutral system, system residual voltage U0=Un when single phase metal is grounded, therefore, actual ground connection occurs
When, the secondary numerical value of residual voltage for being input to protection device 7 should be U00=Un/k2.
Based on Ucc, U00, U00=k*Ucc, k=U00/Ucc=(Un*k1* are obtained by voltage transformation coefficient k
wC)/(k2*IC0)。
Wherein, each parameter definition is：Ucc：Input the voltage of test loop module 4；Icc：Each in test loop module 4
The capacity current sum that road is flowed through；C：The equivalent capacity of test loop module 4；IC0：When generation individual event earth fault, system
Actual capacity current；No-load voltage ratio k1：Zero sequence current mutual inductor no-load voltage ratio；No-load voltage ratio；k2：Zero sequential potential transformer no-load voltage ratio；Un:Primary system
Rated voltage；C0：The equivalent capacity of primary system.
The present invention the course of work be：
1st, user is by tested systematic parameter (Ucc, Icc, IC0, k1, k2, Un) input system MIM message input module 1；
2nd, the input of test voltage source module 2 is 220V alternating currents, is exported to test loop module 4 and voltage transformation module
3 voltage is Ucc；Regulating resistor R0It is integrated in test voltage source module, regulating resistor R0Possess automatic regulation function, make
Obtain the output voltage of voltage transformation module 3 and reach protection device residual voltage initiation value.
The output voltage of the test voltage source module 2 is adjusted by voltage transformation module with voltage transformation coefficient k
Afterwards, the bus residual voltage intake node of small current earthing wire-selecting protection device 7 is accessed.
The test voltage source module 2 possesses programmable functions, can be according to the voltage-mode for needing to export different harmonic contents
Intend earth fault zero sequence power supply.
3rd, voltage transformation module 3 is entered line translation to input voltage Ucc, exported to protection device according to voltage transformation coefficient k
7 residual voltage AM access module, output voltage U00；
4th, test loop module 4, principle reference picture 3；
5th, test loop handover module 5 is automatic switch, can be controlled according to experimental rig programmable control module 9 automatically
Turn on corresponding circuit；
The test loop handover module integrates all switches in Fig. 1, as shown in Fig. 2 the test loop module possesses
Programmable functions, foundation need automatic switchover test loop.
6th, each branch current is accessed protection device by zero-sequence current output module 6；
7th, in 7 soft message of protection device and experimental rig programmable control module 9 at data syn-chronization access test data
Module 8 is managed, data statistics is carried out, writes report..
8th, experimental data processing module can be according to institute's collection voltages, electric current, the position of the switch, protection act Automatic generation of information
Test report, protection device reliability is assessed automatically, its handle complete test report can be exported by USB port to
Family end.
It is emphasized that embodiment of the present invention is illustrative, rather than it is limited, therefore present invention bag
Include and be not limited to embodiment described in embodiment, it is every by those skilled in the art's technique according to the invention scheme
The other embodiment drawn, also belongs to the scope of protection of the invention.
Claims (3)
- A kind of 1. portable Small Electric Current Earthing And Routing Device dynamic simulation test device, it is characterised in that：Including shell and its inside Hookup, the hookup include Test Information input module, test voltage source module, voltage transformation module, experiment Return circuit module, test loop handover module, zero-sequence current output module, protection device, experimental data processing module and experiment dress Put programmable control module；User is exported to the test voltage by the system information input module by systematic parameter is tested Source module, the output end of the test voltage source module is connected by voltage transformation module with the protection device, by the examination Exported after testing the output voltage progress voltage transformation of voltage source module to the residual voltage AM access module of the protection device；It is described The output end of test voltage source module also successively with test loop module, test loop handover module, zero-sequence current output module It is connected with protection device, the output voltage of the test voltage source module is put on after the module of test loop by testing back Road handover module Selection experiment scheme, and the zero-sequence current that zero-sequence current is accessed to the protection device is opened into terminal；The guarantor The output end of protection unit is connected with the experimental data processing module, output end and the user's phase of the experimental data processing module Connection；Protection act result is exported to the experimental data processing module in the form of soft message, supplied after forming test report User exports；The output end of the experimental rig programmable control module respectively with system information input module, test voltage source Module, voltage transformation module, test loop handover module are connected with experimental data processing module.
- 2. a kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device according to claim 1, its feature exist In：The test loop handover module is automatic switch, and automatic conducting phase can be controlled according to experimental rig programmable control module Answer loop.
- 3. a kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device according to claim 1, its feature exist In：The shell is encapsulated using sandwiched metal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689964.5A CN107462801A (en) | 2017-08-14 | 2017-08-14 | A kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710689964.5A CN107462801A (en) | 2017-08-14 | 2017-08-14 | A kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device |
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| CN201710689964.5A Pending CN107462801A (en) | 2017-08-14 | 2017-08-14 | A kind of portable Small Electric Current Earthing And Routing Device dynamic simulation test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983137A (en) * | 2018-07-23 | 2018-12-11 | 济南置真电气有限公司 | A kind of system and method for detection single-phase earth fault line selection tripping round cut reliability |
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| CN205720527U (en) * | 2016-06-24 | 2016-11-23 | 西安热工研究院有限公司 | A kind of multi-functional small current earthing wire-selecting hookup |
| CN106199300A (en) * | 2016-06-21 | 2016-12-07 | 国网河南省电力公司漯河供电公司 | A kind of method of testing of low current neutral grounding system fault route selecting device |
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2017
- 2017-08-14 CN CN201710689964.5A patent/CN107462801A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153884A (en) * | 2007-07-27 | 2008-04-02 | 杭州中恒电气股份有限公司 | Relay-protection steady-state digital moving die test system |
| CN101482602A (en) * | 2008-11-25 | 2009-07-15 | 甘肃电力科学研究院 | Detection analysis system of relay-protection tester |
| CN103472425A (en) * | 2013-09-17 | 2013-12-25 | 国家电网公司 | Method for applying low-current line selection device performance testing platform |
| CN104267365A (en) * | 2014-10-08 | 2015-01-07 | 国家电网公司 | Portable small current earth-fault line selection closed loop performance tester |
| CN104459330A (en) * | 2014-12-25 | 2015-03-25 | 国家电网公司 | High-voltage transmission line zero-sequence impedance measuring circuit and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108983137A (en) * | 2018-07-23 | 2018-12-11 | 济南置真电气有限公司 | A kind of system and method for detection single-phase earth fault line selection tripping round cut reliability |
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Application publication date: 20171212 |