CN204012931U - A kind of novel load boundary switch controller - Google Patents
A kind of novel load boundary switch controller Download PDFInfo
- Publication number
- CN204012931U CN204012931U CN201420393372.0U CN201420393372U CN204012931U CN 204012931 U CN204012931 U CN 204012931U CN 201420393372 U CN201420393372 U CN 201420393372U CN 204012931 U CN204012931 U CN 204012931U
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- zero
- sequence
- control unit
- switch
- fault indicating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model proposes a kind of novel load boundary switch controller, comprise the zero sequence current mutual inductor in the Switch main body that is arranged on load demarcation switch, with the measurement and control unit that described Switch main body is connected, described measurement and control unit comprises control chip; Also comprise three Phase-sequence Fault indicating devices that are separately positioned on threephase cable and be arranged on the zero-sequence fault indicating device on described zero sequence current mutual inductor; Described measurement and control unit also comprises the wireless communication chips being connected with described control chip, and described wireless communication chips communicates to connect with described three Phase-sequence Fault indicating devices and zero-sequence fault indicating device respectively.Load boundary switch controller of the present utility model have fail safe higher, improve Earth Fault Detection accuracy, feature be more easily installed.
Description
Technical field
The utility model relates to the load boundary switch controller technology of 10kV overhead distribution, is specifically related to a kind of novel load boundary switch controller.
Background technology
When the user inside that 10kV overhead distribution T connects or inlet wire side break down, all can cause transformer station's outlet switch trip protection.If nature of trouble is permanent, transformer station's reclosing is unsuccessful, and the accident in user circle will make whole piece distribution line have a power failure.Therefore, be that T connects a load demarcation switch is installed in branch at user demarcation place, configure a load boundary switch controller, realize and automatically excise single phase ground fault and automatism isolation phase fault, guarantee the Electrical Safety of non-failed subs criber.
Load boundary switch controller is generally to realize Fault Isolation or excision, communication function with line feed terminals unit (FTU), and FTU comprises load demarcation switch.Current transformer is called for short CT, and voltage transformer is called for short PT; Load boundary switch controller is electrically connected by control cables and aviation connector with the Switch main body of load demarcation switch, to access the built-in A of switch, C biphase current instrument transformer (CT), the built-in zero sequence current mutual inductor of switch (zero sequence CT), the internal or external two phase line voltage transformers of switch (PT), switch on/off switch coil and switch on/off switch position.
Conventional load demarcation switch and controller electrical schematic diagram as shown in Figure 1, Reference numeral 1 represents Switch main body, and load boundary switch controller comprises the voltage transformer TV that is arranged between A phase circuit and C phase circuit, be arranged on phase-sequence current instrument transformer TAa on A phase circuit, be arranged on phase-sequence current instrument transformer TAc on C phase circuit, be arranged on zero sequence current mutual inductor TAo and measurement and control unit 2 on three-phase line.Voltage transformer TV, current transformer TAa, current transformer TAc, current transformer Tao are all arranged on Switch main body.Measurement and control unit 2 is connected with voltage transformer TV, current transformer TAa, current transformer TAc summation current transformer TAo respectively.Malfunction indicator lamp 3 is for warning.
Load boundary switch controller judges by the secondary current size of a CT of monitoring A, C phase in boundary, whether circuit short trouble has occurred, and then fault is carried out to automatism isolation or excision (killer switch).Limited by switch inner space, the demarcation switch of much loading is generally unworthy of zero sequence CT, for small current neutral grounding system overhead transmission line occasion, can not judge whether single phase ground fault has occurred in boundary; For the user demarcation switch that has configured zero sequence CT, controller judges by the secondary current size of monitoring zero sequence CT in boundary, whether circuit earth fault has occurred, and then earth fault is isolated.Owing to can not arriving the direction that detects zero-sequence current, so can not accurately judge that earth fault necessarily occurs in user circle, in boundary, unsymmetrical current or zero-sequence current (earth current) are likely to flow to conversely basic routing line or earth fault out-of-bounds, cause the isolation of line fault section to make mistakes.
Conventional load boundary switch controller and PT, CT and zero sequence CT are electrically connected, and have equipment and personal safety hidden danger.Because the standard that adopts FTU designs, Overall Power Consumption is bigger than normal, with a PT secondary voltage power supply, has increased equipment investment cost, because secondary voltage is alternating current 220V, also has personal safety hidden danger.
Utility model content
The technical problems to be solved in the utility model is: existing load boundary switch controller structural design is unreasonable, has potential safety hazard, and power consumption is large, cost is high.
The technical solution of the utility model is achieved in that
A kind of novel load boundary switch controller, comprise the zero sequence current mutual inductor in the Switch main body that is arranged on load demarcation switch, the measurement and control unit being connected with described Switch main body, described measurement and control unit comprises control chip, also comprises three Phase-sequence Fault indicating devices that are separately positioned on threephase cable and is arranged on the zero-sequence fault indicating device on described zero sequence current mutual inductor; Described measurement and control unit also comprises the wireless communication chips being connected with described control chip, and described wireless communication chips communicates to connect with described three Phase-sequence Fault indicating devices and zero-sequence fault indicating device respectively.
In preferred scheme, described control chip is the micro-power consumption control chip of MSP430F149 type.
In preferred scheme, described wireless communication chips is CC1100 type micro power consumption wireless transceiver.
In preferred scheme, described measurement and control unit also comprises the GPRS GPRS chip being connected with described control chip.
In preferred scheme, described measurement and control unit is connected with solar cell.
The beneficial effects of the utility model are as follows:
1, fail safe is higher
Boundary switch controller is a CT, a PT of connecting valve body no longer, use Phase-sequence Fault indicating device instead, zero-sequence fault indicating device detects short circuit, earth fault, and carry out exchanges data by wireless mode and user demarcation on-off controller, guarantee that human body and equipment are safer.
2, improved Earth Fault Detection accuracy
Adopt the built-in high accuracy zero sequence CT of external electronic type zero sequential potential transformer and Switch main body, controller can measure residual voltage, zero-sequence current and the zero-sequence current direction of circuit simultaneously.Controller can accurately judge by the size that compares residual voltage whether system has earth fault, can accurately judge by the size and Orientation that compares zero-sequence current whether earth fault occurs on subscriber's line.
3, install more convenient
The controller of the technical program is without a CT and a PT of connecting valve body, only need by remote control, the remote signalling interface aviation plug of aviation plug connecting valve body, be not electrically connected with 10kV circuit, can charged installation controller and the supporting solar panel of controller.Meanwhile, supporting Phase-sequence Fault indicating device, the zero-sequence fault indicating device of controller also can chargedly be installed.The mounting means that do not have a power failure has reduced loss of outage, has improved power supply reliability.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is conventional load demarcation switch and controller electrical schematic diagram;
Fig. 2 is load demarcation switch and the controller electrical schematic diagram of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
The technical scheme of the present embodiment intends cancelling A, a C CT mutually of load demarcation switch inside, change by distribution line Phase-sequence Fault indicating device and zero-sequence fault indicating device (hereinafter to be referred as fault detector) and realize load current measurement and short trouble measuring ability, to line, 1 fault detector is installed respectively at load side A, B, the C three-phase of load demarcation switch.Local instruction and the wireless communication function of reporting to the police of fault detector band, when the fault that is short-circuited of circuit in boundary, Phase-sequence Fault indicating device will provide red dynamo-electric board turning and the instruction of LED flashing light, the line informations such as short trouble alarm signal, load current, line influence voltage be sent on load boundary switch controller by wireless mode simultaneously.The definite value of fault detector can be at the scene or main website, modifies by wireless communication mode.
Load demarcation switch shown in Figure 2 and controller electrical schematic diagram, comprise the zero sequence current mutual inductor TAo in the Switch main body 1 that is arranged on load demarcation switch, the measurement and control unit 2 being connected with Switch main body 1, and measurement and control unit 2 comprises control chip; Also comprise three Phase-sequence Fault indicating devices 4 that are separately positioned on threephase cable and be arranged on the zero-sequence fault indicating device 5 on zero sequence current mutual inductor TAo; Measurement and control unit 2 also comprises the wireless communication chips being connected with control chip, and wireless communication chips communicates to connect with three Phase-sequence Fault indicating devices 4 and zero-sequence fault indicating device 5 respectively.
Above-mentioned control chip can be the micro-power consumption control chip of MSP430F149 type, and wireless communication chips can be CC1100 type micro power consumption wireless transceiver.
Preferred measurement and control unit 2 also comprises the GPRS GPRS chip being connected with control chip.Measurement and control unit 2 is connected with the solar cell that is used to measurement and control unit 2 to power.
Cancelled A, CT of C because of load demarcation switch, Switch main body inner space increases, and technique scheme is intended installing in Switch main body inside the zero sequence CT that 1 no-load voltage ratio is 20A:1A additional, then installs 1 zero-sequence fault indicating device 5 additional at the secondary circuit of zero sequence CT.The former limit winding of zero-sequence fault indicating device 5 is 50 circles, for amplifying the zero-sequence current letter of a zero sequence CT output, then measures zero-sequence current size and detects single phase ground fault.Local instruction and the wireless communication function of reporting to the police of zero-sequence fault indicating device 5 bands, when circuit generation single phase ground fault in boundary, zero-sequence fault indicating device 5 will provide the instruction of LED flashing light, the information exchanges such as earth fault alarm signal, zero-sequence current be crossed to wireless mode simultaneously and be sent on load boundary switch controller.The definite value of zero-sequence fault indicating device 5 can be at the scene or main website, modifies by wireless communication mode.
For improving the accuracy that detects single phase ground fault, technique scheme increases by 1 electronic type zero sequential potential transformer TAo at user demarcation place, and carrys out by zero sequence (sense of current) fault detector 5 residual voltage and the zero-sequence current direction that user monitors boundary.1 zero-sequence fault indicating device 5 with direction measuring ability is installed, the secondary voltage signal of synchronized sampling electronic type zero sequential potential transformer TAo and the secondary current signal of zero sequence CT, calculate residual voltage, zero-sequence current, zero-sequence current direction, can accurately judge whether single phase ground fault has occurred in boundary, provide LED flashing light warning instruction, and send to user demarcation on-off controller by wireless mode.Above-mentioned functions is incorporated in chip MSP430F149 and CC1100, belongs to hardware product, and user only need arrange the definite value parameter of said chip and can install and use, easy to use.
The user demarcation on-off controller of developing based on the technical program adopts the wireless frequency hopping communication modes of 420～440MHz to communicate by letter with CC1100 with Phase-sequence Fault indicating device 4 and zero-sequence fault indicating device 5; Measurement and control unit 2 is communicated by letter by GPRS communication modes with main station monitoring center, hardware with Time Controller all adopts low power consumption design method, complete machine average power consumption is lower than 1W, can adopt 30～50W/32V single-crystalline-silicon solar-cell panel is controller power supply, and need not power by a PT, be not electrically connected with 10kV circuit, improved equipment and personal fail safe.
The user demarcation on-off controller of developing based on the technical program, continues the electric connecting relation of reservation and switch on/off switch coil and on/off switch position, to realize the automatism isolation of short circuit and earth fault and the remote monitoring function of switch.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. a novel load boundary switch controller, comprise the zero sequence current mutual inductor in the Switch main body that is arranged on load demarcation switch, the measurement and control unit being connected with described Switch main body, described measurement and control unit comprises control chip, it is characterized in that, also comprise three Phase-sequence Fault indicating devices that are separately positioned on threephase cable and be arranged on the zero-sequence fault indicating device on described zero sequence current mutual inductor; Described measurement and control unit also comprises the wireless communication chips being connected with described control chip, and described wireless communication chips communicates to connect with described three Phase-sequence Fault indicating devices and zero-sequence fault indicating device respectively.
2. a kind of novel load boundary switch controller according to claim 1, is characterized in that, described control chip is MSP430F149 type control chip.
3. a kind of novel load boundary switch controller according to claim 1, is characterized in that, described wireless communication chips is CC1100 type wireless transceiver.
4. a kind of novel load boundary switch controller according to claim 1, is characterized in that, described measurement and control unit also comprises the GPRS GPRS chip being connected with described control chip.
5. a kind of novel load boundary switch controller according to claim 1, is characterized in that, described measurement and control unit is connected with solar cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420393372.0U CN204012931U (en) | 2014-07-16 | 2014-07-16 | A kind of novel load boundary switch controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420393372.0U CN204012931U (en) | 2014-07-16 | 2014-07-16 | A kind of novel load boundary switch controller |
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| Publication Number | Publication Date |
|---|---|
| CN204012931U true CN204012931U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420393372.0U Expired - Fee Related CN204012931U (en) | 2014-07-16 | 2014-07-16 | A kind of novel load boundary switch controller |
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| Country | Link |
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| CN (1) | CN204012931U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160234A (en) * | 2016-08-27 | 2016-11-23 | 扬州科宇电力有限公司 | A kind of two distant type monitoring switch controllers |
-
2014
- 2014-07-16 CN CN201420393372.0U patent/CN204012931U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160234A (en) * | 2016-08-27 | 2016-11-23 | 扬州科宇电力有限公司 | A kind of two distant type monitoring switch controllers |
| CN106160234B (en) * | 2016-08-27 | 2018-07-17 | 扬州科宇电力有限公司 | A kind of two distant type monitoring switch controllers |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20170716 |
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| CF01 | Termination of patent right due to non-payment of annual fee |