CN204333937U - Detect the intellectualized detection device based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems - Google Patents
Detect the intellectualized detection device based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems Download PDFInfo
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Abstract
The utility model relates to the intellectualized detection device of a kind of detection based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems, comprise current practice device, residual voltage operating means, intelligent switch checkout gear, fictitious load, intelligent protection device, communication device, detect background management system, the beneficial effects of the utility model: for power supply management department provides a kind of residual voltage of intellectualized switchgear one-phase ground protection function, the intelligent Detection of zero-sequence current, examination is detected by performance requirement to intellectualized switchgear to be installed totally, guarantee device security reliability service, give full play to the useful effect of intelligent power network, improve power supply quality.
Description
Technical field
The utility model relates to a kind of detection of intelligent protection function of intellectualized switchgear, particularly relates to the intelligent Detection of a kind of detection based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems.
Background technology
Along with national grid builds the enforcement of powerful intelligent power network engineering, the intelligent breaker that increasing function differs drops into operation of power networks, and the demand particularly with the intelligent breaker of one-phase ground protection is increasing.The current whole nation each power supply management department also carries out an acceptance inspection to intelligent switch in the detection that continuity is traditional means of checking and accepting, only industrial frequency withstand voltage and overcurrent protection examination are carried out to intelligent switch, its one-phase ground protection function and communication back-stage management function carry out an acceptance inspection without means, therefore the various switchgear not having one-phase ground protection function and do not have a communication back-stage management function also have passed current examination, and drop into operation of power networks, have impact on location and the eliminating of electric network fault for this reason, affect the time and power supply quality that restore electricity, therefore the detection system of a kind of intellectualized switchgear of developmental research is current top priority.
Summary of the invention
The purpose of this utility model is the defect overcoming prior art, detects the residual voltage of intellectualized switchgear one-phase ground protection function, the intelligent Detection of zero-sequence current for power supply management department provides a kind of.
For achieving the above object, the utility model adopts a kind of like this intelligent Detection detected based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems, comprise current practice device, residual voltage operating means, intelligent switch checkout gear, fictitious load, intelligent protection device, communication device, detection background management system, wherein the output of current practice platform is connected with an input of intelligent switch checkout gear; An output of residual voltage operating means is connected with another input of intelligent switch checkout gear, residual voltage operating means also forms Signal transmissions with intelligent switch checkout gear and is connected, and the output of intelligent switch checkout gear is connected with the input of detected intelligent switch; The detected output of intellectualized switchgear is connected with the input of fictitious load; Be the 10kV circuit of isolated neutral by booster voltage instrument transformer group (or three-phase transformer) inversion by three-phase 220V, access fictitious load forms the 10kV supply line that complete equipilibrium is run; Operating single-phase breaker closing makes a wherein phase 10kV circuit through grounding resistor group ground connection, cause the change of 10kV system phase angle difference; The residual voltage of simultaneously monitoring system configuration, current transformer group are by image data, computing is carried out to the intelligent controller of detection system and the intelligent controller of detected switchgear through transmission channel synchronous driving, its voltage of comparative analysis, current parameters variable quantity differentiate single-phase earthing classification and earth current direction, by the classification setting principle of Protection parameters, intelligent protection unit sends instruction, makes the three-phase breaker successively separating brake action of detected switchgear and detection system configuration; The detection data of detection system background manage software to each test link manage, comparative analysis; generation can for the form of access, inquiry; can differentiate whether detected switchgear inside is configured with residual voltage, current protecting function; whether its function meets the requirement of Product Specifications, and forms examining report.
Detect the intelligent Detection based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems, residual voltage operating means comprises residual voltage operating means, one or more intelligent protection devices, communication device and detection background management system; Wherein residual voltage operating means is exported by 10kV voltage and forms with control unit, voltage signal transmission unit, one or more acquisition tables meters, and residual voltage operating means is connected with intelligent protection device one end simultaneously; The other end of intelligent protection device forms with communication device and is connected; Communication device forms be connected with detection background management system.
Intelligent Detection also comprises signal and gathers protected location, signal and gather protected location and to form with intelligent switch checkout gear and be connected, signal with gather the protected location other end and be connected with described intelligent protection device one end.
Intelligent switch checkout gear comprises containing ground unit before the three-phase 10kV inversion unit of isolated neutral, three-phase breaker unit, 10kV residual voltage generating unit, zero-sequence current generating unit, switchgear and after switchgear; Wherein three-phase 10kV inversion unit is made up of 10kV/220V booster voltage instrument transformer group, isolating switch and connection copper bar; Three-phase breaker unit is made up of three-phase breaker, composite bushing and connection copper bar; 10kV residual voltage generating unit is by sampling by no-voltage instrument transformer group, single-phase earthing circuit breaker, grounding resistor group and connecting copper bar and insulator forms; Grounding resistor component is: metallic ground resistor group, nonmetal grounding resistor group, capacitive grounding resistor group; Nonmetal grounding resistor component is water-based grounding resistor group, woody cotton grounding resistor group, succulence grounding resistor group; Woody cotton grounding resistor component is: moist woody cotton grounding resistor group, the woody cotton grounding resistor group of dryness.
Current practice device comprises low-voltage and high-current generating unit, control and protection unit, current signal transfer and 1 cover or many cover acquisition tables meters; Low-voltage and high-current generating unit is made up of the Switching Power Supply summation current transformer group of low-voltage and high-current generator, five anti-interlockings.
The beneficial effects of the utility model: for power supply management department provides a kind of residual voltage of intellectualized switchgear one-phase ground protection function, the intelligent Detection of zero-sequence current; examination is detected by performance requirement to intellectualized switchgear to be installed totally; guarantee device security reliability service; give full play to the useful effect of intelligent power network, improve power supply quality.
Accompanying drawing explanation
Fig. 1 is the functional-block diagram that the utility model embodiment detects based on the intelligent Detection of the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems;
Fig. 2 is the utility model embodiment intelligent switch structure of the detecting device schematic diagram;
Fig. 3 is test for ground line map before the detected intellectualized switchgear of the utility model embodiment;
Fig. 4 is that the utility model embodiment detects test for ground line map after detected intellectualized switchgear;
Fig. 5 is the utility model embodiment three-stage protection acceptance test line map;
Fig. 6 is the utility model embodiment zero-sequence current protection acceptance test line map;
Fig. 7 is the intelligent protection of the utility model embodiment, communication and background management system functional-block diagram.
Embodiment
As shown in Figure 1, a kind of intelligent Detection detected based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems, comprise current practice device, residual voltage operating means, intelligent switch checkout gear, fictitious load, intelligent protection device, communication device, detection background management system, all slotting by aviation between each part, multicore cable connects, and wherein the output of current practice platform is connected with an input of intelligent switch checkout gear; An output of residual voltage operating means is connected with another input of intelligent switch checkout gear, residual voltage operating means also forms Signal transmissions with intelligent switch checkout gear and is connected, and the output of intelligent switch checkout gear is connected with the input of detected intelligent switch; The detected output of intelligent switch is connected with the input of fictitious load.
Be the 10kV circuit of isolated neutral by booster voltage instrument transformer group (or three-phase transformer) inversion by three-phase 220V, access fictitious load forms the 10kV supply line that complete equipilibrium is run; Operating single-phase breaker closing makes a wherein phase 10kV circuit through grounding resistor group ground connection, cause the change of 10kV system phase angle difference; The residual voltage of simultaneously monitoring system configuration, current transformer group are by image data, computing is carried out to the intelligent controller of detection system and the intelligent controller of detected switchgear through transmission channel synchronous driving, its voltage of comparative analysis, current parameters variable quantity differentiate single-phase earthing classification and earth current direction, by the classification setting principle of Protection parameters, intelligent protection unit sends instruction, makes the three-phase breaker successively separating brake action of detected switchgear and detection system configuration; The detection data of detection system background manage software to each test link manage, comparative analysis; generation can for the form of access, inquiry; can differentiate whether detected switchgear inside is configured with residual voltage, current protecting function; whether its function meets the requirement of Product Specifications, and forms examining report.
Two, each functional unit is described in detail:
1, zero-sequence current and the synchronous detection system of residual voltage:
1,1 system configuration:
1,1,1 is made up of residual voltage operating means (containing intelligent protection device, communication device, detection background management system), intelligent switch checkout gear, fictitious load, detected switch and intelligent controller four part;
1, all slotting by aviation between 1,2 each parts, multicore cable connects;
1,1,3 residual voltage operating means dresses: with the 10kV voltage with certain capacity and export with control unit, voltage signal transmit, acquisition tables meter 1 overlaps, intelligent protection device (controller) 2, communication device and detection background management system;
1,1,4 detected switches should form by with the intelligent controller of ground protection function and circuit breaker;
1,1,5 fictitious loads: after connecting system 10kV circuit, make 10kV circuit by corresponding running current.
1,2 operation principles:
Adopt three-phase voltage inverter, by three-phase 220V by booster voltage instrument transformer group 2(or three-phase transformer) inversion is the three-phase 10kV voltage of isolated neutral, and form 10kV circuit, when after access fictitious load, form the 10kV supply line being in complete equipilibrium and running; By single-phase circuit breaker 14 close a floodgate make wherein a phase 10kV circuit through grounding resistor group 16 ground connection, cause the change of 10kV system phase angle difference, thus the open delta voltage Uo of sampling zero sequential potential transformer group 3 changes, its open delta voltage variable quantity is determined by the resistance of adjustment grounding resistor group 16; The Ubn Ubn Ucn Ubb Ubc Ubc of zero sequential potential transformer group 3 of simultaneously sampling changes, and its variable quantity is determined by the resistance of adjustment grounding resistor group 16; The I o of zero sequence current mutual inductor group 12 of simultaneously sampling changes, and its variable quantity is determined by the resistance of adjustment grounding resistor group 16.Utilize controller active and passive transfer function, called together by inspection background system before test for ground and survey Ib Ib Ic I o Ubn Ubn Ucn Ubb Ubc Ubc Uo, and data before deriving printing test for ground, moment system controller active upload Ib Ib Ic I o Ubn Ubn Ucn Ubb Ubc Ubc Uo is dropped into ground connection, upload phase pushing figure simultaneously and derive data when printing test for ground, thus realizing intellectualized detection test.After ground connection event occurs, the digital circuit of controller carries out computing to ground signalling amount, determines the type of event, if when there is the event exceeding setting, controller sends separating brake instruction, breaker open operation, guarantees the fail safe of line powering.
1,3 distinguishing rules:
1,3,1 by the analogue ground under different analog quantity; adjustment grounding resistor group; cause sampling zero sequential potential transformer group open delta voltage variable quantity and the variable quantity of zero-sequence current to determine its single-phase earthing classification according to different grounding resistances, and carry out operational analysis by the software of protected location and determine ground connection direction.
1, the intelligent controller of 3,2 detection systems and the intelligent controller of detected vacuum circuit-breaker all collect the change of open delta voltage and the change of zero-sequence current; Set by the classification of Protection parameters, detected intelligent vacuum circuit breaker separating brake under the defencive function effect of intelligent controller, the three-phase vacuum breaker also separating brake under the defencive function effect of intelligent controller of system; Detected intellectualized switchgear internal configurations zero sequential potential transformer is described for this reason, and its tested controller has zero-sequence voltage protection function, and the accuracy of its protection precision meets properties of product.By the wiring position of adjustment ground connection transition connecting line, earth point can be in two kinds of ground connection situations of ground connection after ground connection before switch or switch, tested controller and system controller simultaneous display are before switch or ground connection after switch, illustrate that tested controller has unidirectional ground connection direction determining function.
As shown in Figure 2, intelligent switch checkout gear: form by containing ground unit before the three-phase 10kV inversion unit of isolated neutral, three-phase breaker unit, 10kV residual voltage generating unit, zero-sequence current generating unit, switchgear and after switchgear;
At this, explanation is done to the label parts in Fig. 2: 1 is body welding; 2 and 3 is all voltage transformer; 4,8,10,15,17,18 is all connect copper bar; 5 is insulators; 6 is isolator operation handles; 7 is isolating switches; 9 is three-phase vacuum breaker; 11 is composite bushings; 12 is protective current instrument transformers; 13 is zero sequence current mutual inductors; 14 is single-phase vacuum circuit breakers; 16 is grounding resistor groups; 19 is ground connection transition connecting lines; 20 and 21 is all grounding sleeve after switch;
1, the three-phase 10kV inversion unit of 4,1 isolated neutral: be made up of 10kV/220V booster voltage instrument transformer group 2, isolating switch 7 and connection copper bar;
1,4,2 three-phase breaker unit: be made up of three-phase breaker 9, composite bushing 11 and connection copper bar;
1,4,310kV residual voltage generating unit: by sampling no-voltage instrument transformer group 3, single-phase earthing circuit breaker 14, grounding resistor group 16 and connect copper bar and insulator forms;
1,4,4 grounding resistor groups 16 are divided into: metallic ground resistor group, nonmetal grounding resistor group, capacitive grounding resistor group; Nonmetal grounding resistor component is water-based grounding resistor group, woody cotton grounding resistor group, succulence grounding resistor group; Woody cotton grounding resistor component is: moist woody cotton grounding resistor group, the woody cotton grounding resistor group of dryness.
1,5 test operation programs and Signal transmissions collection:
1,5,1 disconnecting switch operation handle, by isolating switch switching to closing position;
1,5,2 show detected switch access test circuit by Fig. 3,4;
Here first an explanation is done to the label in Fig. 3 and 4: b1 is booster voltage instrument transformer, b2 is isolating switch, b3 is three-phase breaker, (b4, b6, b8, b9) is four groups of composite bushings, b5 is sampling zero sequential potential transformer group, b7 is detected switch, b10 is single-phase earthing circuit breaker, b11 is grounding resistor group, b11 is fictitious load.
1,5,3 close total power switch, close voltage-operated mains switch, hop controller mains switch, operation three-phase breaker close a floodgate;
1,5,4 protection test scheme is synchronously detected according to zero-sequence current and residual voltage, slow adjustment voltage regulator, note observing boosting table meter simultaneously, voltage is risen to 10kV, is verified breaker closing, and drive input fictitious load, recruit and survey and data before printing test for ground, operate single-phase breaker closing, carry out unidirectional ground protection test protection test, print the test for ground data of active transmission to backstage; Comparative analysis is detected circuit breaker (containing controller) data, judges whether detected circuit breaker (containing controller) has the accuracy of unidirectional ground protection function and parameter.
1,5,5 signals collecting table meter, the timer datas simultaneously observing operating desk, with controller and detected circuit breaker voltage Data Comparison, determine the accuracy of its reliability protected and data;
1, the reasonability of 5,6 statistics, the detected circuit breaker of judgement and controller mating protection;
1,5,7 examining report is provided.
1,6 method of discrimination: (for B phase ground connection and the earth current of metal feedback nearby) (distant place the earth feedback earth current test: form report separately)
1,6,1 when there is not single phase ground fault, sampled voltage instrument transformer group display voltage:
Voltage between phases: Ubb, Ubc, Ubc are 220V;
Phase-to-ground voltage: Ubn, Ubn, Ucn are 127V;
Open delta voltage: Uo is 0V, zero-sequence current: Io is 0mB
1,6,2 metallic ground:
Voltage between phases: Ubb, Ubc all drop to 127V, Ubc and be then maintained 220V;
Phase-to-ground voltage: Ubn, Ucn all rise to 220V, Ubn and then drop to 0V;
Open delta voltage: Uo rises to 100V, zero-sequence current: Io is 20mB
1,6,3 nonmetal ground connection:
Voltage between phases: Ubb, Ubc all drop to 127 ~ 220V, Ubc is then maintained 220V;
Phase-to-ground voltage: Ubn, Ucn all rise to 220V, Ubn and then drop to 0V;
Open delta voltage: Uo rises to 100 ~ 127V, zero-sequence current: Io is 20 ~ 40mB
1,6,4 arc groundings:
Voltage between phases: Ubb, Ubc all drop to 127 ~ 220V, Ubc is then maintained 220V;
Phase-to-ground voltage: Ubn, Ucn all rise to 220V, Ubn and then drop to 0V;
Open delta voltage: Uo rises to 100 ~ 127V, zero-sequence current: Io is 20 ~ 40mB
2, zero-sequence current detection system (the difference detection system of the zero-sequence current change that three-phase current unbalance causes and the zero-sequence current change that unidirectional ground connection causes):
2,1 system configuration:
2,1,1 is made up of current practice platform, residual voltage operating means (containing intelligent protection device, communication device, detection background management system), intelligent switch checkout gear, detected switch and intelligent controller four part;
2, all slotting by aviation between 1,2 each parts, multicore cable connects;
2,1,3 current practice platforms are equipped with: low-voltage and high-current generating unit, control and protection unit, current signal transfer and acquisition tables meter 1 overlap;
2,1,4 low-voltage and high-current generating units: be made up of the Switching Power Supply summation current transformer group of low-voltage and high-current generator, five anti-interlockings;
2,1,5 with the use of residual voltage operating means be equipped with: current signal transfer, acquisition tables meter 1 overlap, intelligent protection device (controller) 2, communication device, detection background management system;
2,1,6 detected switches should form by with the intelligent controller of ground protection function and circuit breaker;
2,2 operation principles:
Employing low-voltage and high-current output principle, three-phase straight-through current transformer export zero-sequence current principle, phase angle difference causes vector change principle, backflow and flow dividing structure is adopted to play phase angle difference change principle, three-phase current unbalance causes vector change principle, phase shifter causes vector change principle, thus produces zero-sequence current.
2,3 distinguishing rules:
Cause the electric current of vector change through phase shifter to detection system input, the intelligent controller of detection system and the intelligent controller of detected vacuum circuit-breaker all collect the change of zero-sequence current; Set by the classification of Protection parameters; detected intelligent vacuum circuit breaker separating brake under the defencive function effect of intelligent controller; the three-phase vacuum breaker also separating brake under the defencive function effect of intelligent controller of system; and the zero-sequence current value of detected controller is consistent with the zero-sequence current value of system controller; detected intelligent vacuum circuit breaker internal configurations zero sequence current mutual inductor is described for this reason; its intelligent controller has zero-sequence current protection function, and the accuracy of its protection precision meets properties of product.
When detection system zero sequence CT and tested switch zero sequence CT no-load voltage ratio are 20:1 and three-phase protective CT no-load voltage ratio is 200:5 configuration, three phase unbalance current is inputted respectively to detection system, vector changing value is that B1 (row are as B1=20B) and B2(arranges as B2=50B) electric current, system controller adopts the secondary current of B01=1B and B02=2.5 respectively, the secondary current of B01=1B and B02=2.5B adopted by detected controller simultaneously, illustrates that being verified switch internal is configured with zero sequence current mutual inductor; If the secondary current of B01=0.5B and B02=1.25B adopted by detected controller simultaneously, illustrate that being verified switch internal does not configure zero sequence current mutual inductor, just added sampling zero sequence circuit at secondary circuit.In like manner can detect the zero-sequence current value under the different no-load voltage ratio of analysis three-phase protective CT.
Unidirectional backflow and shunt current is inputted respectively to detection system, its vectorial changing value is identical with above-mentioned test, vector changing value is that B1 (row are as 20B) and B2(arranges as 50B) electric current, system controller adopts the secondary current of B01=1B and B02=2.5B respectively, the secondary current of B01=1B and B02=2.5B adopted by detected controller simultaneously, illustrates that being verified switch internal is configured with zero sequence current mutual inductor; If the secondary current of B01=0.5B and B02=1.25B adopted by detected controller simultaneously, illustrate that being verified switch internal does not configure zero sequence current mutual inductor, just added sampling zero sequence circuit at secondary circuit.In like manner can detect the zero-sequence current value under the different no-load voltage ratio of analysis three-phase protective CT.
2,5,2 intelligent switch checkout gear bodies: be made up of three-phase breaker unit, protection and zero-sequence current generating unit, intelligent controller protected location and connection copper bar;
2,5,3 three-phase breaker unit: be made up of three-phase breaker 9, composite bushing 11 and connection copper bar;
2,5,4 protection and zero-sequence current generating units: by two groups of three-phase straight-through current transformers and zero sequence current mutual inductor group and be connected copper bar and form;
2,5,5 detected switches should be with one group of three-phase straight-through current transformer and zero sequence current mutual inductor composition;
2,6 test operation programs and Signal transmissions collection:
Intelligent switch checkout gear isolating switch 7 must be placed in gate-dividing state before doing current testing
2,6,1 press shown in Fig. 5,6, switch access test circuit will be detected;
Here first an explanation is done to the label in Fig. 5 and Fig. 6: b1 is current practice end output, b2 is three-phase breaker, (b3, b6, b11) is four groups of composite bushings, b4 and b7 is two groups of current transformers, b5 and b8 is two groups of zero sequence current mutual inductors, b9 is detected switch, b10 is busbar, b12 is current practice end input.
2,6,2-in-1 total power switch, conjunction current practice platform mains switch, hop controller mains switch;
2,6,3 according to the current protection testing program drafted, and slowly regulates voltage regulator, notes observing up-flow table meter simultaneously, electric current is risen to required electric current, presses timing button, and carry out relative recording;
2,6,4 observation current practice platform ammeters, timers value, contrast with control Lu and tested controller current values, determine its reliability protected;
2, the reasonability of 6,5 statistics, the detected circuit breaker of judgement and controller mating protection;
2,6,6 examining report is provided.
2,7 method of discrimination:
2, in 7,1 whole detection test process, the detection of real-time backstage is carried out to current signal;
2,7,2 the mode of comparing is adopted to determine the reasonability of detected switch and controller current protection;
3, the intelligent protection of detection system, communication and background management system:
3,1 system configuration
3.1.1 be made up of intelligent controller, communication module, computer, background manage software
3.1.2 intelligent switch checkout gear body and the Signal transmissions of intelligent controller adopt aviation plug to be connected with cable to transmit, intelligent controller and computer adopt wired and wireless transmission, background manage software to be embedded in computer.
3.1.3 intelligent controller adopts digital circuit composition, dual power supply module for power supply, liquid crystal display, touch-key operation and background computer operation, has three-stage protection function, zero-sequenceprotection function, reclosing function, failure logging and query function, constantly data-transformation facility.
3,1.4 communication modules possess GPRS wireless transmission function, Ethernet transfer function, reserved optical communication interface, have IEC60870-5-101 access to netwoks (stipulations) selection function of IEC60870-5-101:2002 basic telemechanical task planning standard (stipulations) and IEC60870-5-104:2002 employing standard transmission protocol collection.GPRS communication module has independently TDP communication, independently UDP communication, DTP and UDP integrated interface communication function.
3.1.5 " four distant management " function of Intelligent Measurement can be realized after background manage software embeddeding computer: the state of detection system is monitored, Ib Ib Ic I o Ubn Ubn Ucn Ubb Ubc Ubc Uo is monitored, system is carried out to remote operation, carried out remote setting to system protection definite value; The detection data that each tests link can be inquired about and printed generating report forms.
3.1.6 communication protocol: native system has the IEC60870-5-101 access to netwoks (stipulations) of IEC60870-5-101:2002 basic telemechanical task planning standard (stipulations) and IEC60870-5-104:2002 employing standard transmission protocol collection, and there is selection function, can realize the wired transmission and the wireless transmission that detect data, whether the communication protocol that simultaneously can detect tested controller meets the distribution automation demand of region.
Claims (5)
1. one kind is detected the intellectualized detection device based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems, it is characterized in that: described intelligent Detection comprises current practice device, residual voltage operating means, intelligent switch checkout gear, fictitious load, intelligent protection device, communication device, detection background management system, wherein the output of current practice platform is connected with an input of intelligent switch checkout gear; An output of residual voltage operating means is connected with another input of intelligent switch checkout gear, residual voltage operating means also forms Signal transmissions with intelligent switch checkout gear and is connected, and the output of intelligent switch checkout gear is connected with the input of detected intelligent switch; The detected output of intellectualized switchgear is connected with the input of fictitious load.
2. detection according to claim 1 is based on the intellectualized detection device of the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems, it is characterized in that: described residual voltage operating means comprises residual voltage operating means, one or more intelligent protection devices, communication device and detection background management system; Wherein residual voltage operating means is exported by 10kV voltage and forms with control unit, voltage signal transmission unit, one or more acquisition tables meters, and residual voltage operating means is connected with intelligent protection device one end simultaneously; The other end of intelligent protection device forms with communication device and is connected; Communication device forms be connected with detection background management system.
3. detection according to claim 1 and 2 is based on the intellectualized detection device of the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems; it is characterized in that: described intelligent Detection also comprises signal and gathers protected location; signal and gather protected location and to form with intelligent switch checkout gear and be connected, signal with gather the protected location other end and be connected with described intelligent protection device one end.
4. detection according to claim 1 and 2 is based on the intellectualized detection device of the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems, it is characterized in that: described intelligent switch checkout gear comprises containing ground unit before the three-phase 10kV inversion unit of isolated neutral, three-phase breaker unit, 10kV residual voltage generating unit, zero-sequence current generating unit, switchgear and after switchgear; Wherein three-phase 10kV inversion unit is made up of 10kV/220V booster voltage instrument transformer group, isolating switch and connection copper bar; Three-phase breaker unit is made up of three-phase breaker, composite bushing and connection copper bar; 10kV residual voltage generating unit is by sampling by no-voltage instrument transformer group, single-phase earthing circuit breaker, grounding resistor group and connecting copper bar and insulator forms; Grounding resistor component is: metallic ground resistor group, nonmetal grounding resistor group, capacitive grounding resistor group; Nonmetal grounding resistor component is water-based grounding resistor group, woody cotton grounding resistor group, succulence grounding resistor group; Woody cotton grounding resistor component is: moist woody cotton grounding resistor group, the woody cotton grounding resistor group of dryness.
5. detection according to claim 1 and 2 is based on the intellectualized detection device of the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems, it is characterized in that: described current practice device comprises low-voltage and high-current generating unit, control and protection unit, current signal transfer and 1 cover or many cover acquisition tables meters; Low-voltage and high-current generating unit is made up of the Switching Power Supply summation current transformer of low-voltage and high-current generator, five anti-interlockings.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445511A (en) * | 2015-12-11 | 2016-03-30 | 国家电网公司 | Singlephase earth fault signal generating device and method for simulation isolated neutral system |
| CN109861186A (en) * | 2019-03-13 | 2019-06-07 | 国网陕西省电力公司电力科学研究院 | A kind of 10kV arcing ground controllable device |
-
2014
- 2014-03-25 CN CN201420137086.8U patent/CN204333937U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445511A (en) * | 2015-12-11 | 2016-03-30 | 国家电网公司 | Singlephase earth fault signal generating device and method for simulation isolated neutral system |
| CN105445511B (en) * | 2015-12-11 | 2019-04-16 | 国家电网公司 | Simulate isolated neutral system singlephase earth fault signal generation apparatus and method |
| CN109861186A (en) * | 2019-03-13 | 2019-06-07 | 国网陕西省电力公司电力科学研究院 | A kind of 10kV arcing ground controllable device |
| CN109861186B (en) * | 2019-03-13 | 2020-06-30 | 国网陕西省电力公司电力科学研究院 | 10kV electric arc grounding controllable device |
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