CN202333779U - Small-current grounding fault detecting and isolating device and system - Google Patents

Small-current grounding fault detecting and isolating device and system Download PDF

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Publication number
CN202333779U
CN202333779U CN2011203986993U CN201120398699U CN202333779U CN 202333779 U CN202333779 U CN 202333779U CN 2011203986993 U CN2011203986993 U CN 2011203986993U CN 201120398699 U CN201120398699 U CN 201120398699U CN 202333779 U CN202333779 U CN 202333779U
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CN
China
Prior art keywords
current grounding
module
low current
communication module
unit
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Expired - Lifetime
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CN2011203986993U
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Chinese (zh)
Inventor
陈雷
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WENZHOU POWER SUPPLY BUREAU
RUI'AN ELECTRIC POWER CO Ltd
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WENZHOU POWER SUPPLY BUREAU
RUI'AN ELECTRIC POWER CO Ltd
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Priority to CN2011203986993U priority Critical patent/CN202333779U/en
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Publication of CN202333779U publication Critical patent/CN202333779U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/7853
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems 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
    • Y04S40/12Systems 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
    • Y04S40/126Systems 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

Abstract

The utility model provides a small-current grounding fault detecting and isolating device comprising a data collecting module, a communication module and a processor module, wherein the data collecting module and the communication module are connected with the processor module; the processor module is connected with a trip circuit of a boundary switch; the data collecting module is used for measuring route data in real time; the communication module is used for sending and receiving information in a wireless manner; and the processor module is used for judging whether a small-current grounding fault is generated or not according to measured data, and controlling the boundary switch to trip so as to isolate the faults and triggering the communication module to send fault information if the small-current grounding fault is generated. The utility model further provides a small-current grounding fault detecting and isolating system comprising an upper computer and a plurality of the small-current grounding fault detecting and isolating devices. By utilizing the small-current grounding fault detecting and isolating device and system disclosed by the utility model, the faults can be rapidly detected and isolated; the speed and efficiency of searching and solving the faults are greatly improved; the user switching-off time is reduced; the power supply reliability is improved; and the intelligent level of a distribution network is improved.

Description

Low current grounding detection and spacer assembly and system
Technical field
The utility model belongs to field of power, is specifically related to a kind of low current grounding detection and spacer assembly and system.
Background technology
Along with urban construction scale increases rapidly; The structure of 10 kV power distribution networks becomes increasingly complex; The fault that occurs in user's branched line is more and more, when load side breaks down, and the failure break that electric substation usually can non-selectivity and cause having a power failure completely; Even still need search through line walking in a lot of local fault points, efficient is very low.
10 kV distribution systems of different earthing modes processing mode when single phase ground fault takes place is inconsistent, and for arc suppression coil earthing system, breaking not during line single phase grounding failure is only sent out ground signalling.For the low resistance grounding system, breaking during single phase ground fault.When load side generation single phase ground fault, the Fault Isolation means of lack of uniform.
Search efficiency during for raising fault point especially user side fault, usually adopt following two types of modes in the power distribution network at present: one type is utilized protective relaying device, distribution supervisory control system and other special arrangement that information specific is provided; Another kind ofly do not need special device, and only utilize the information of the phone call for appeal that the user makes.It is more accurate that first kind method is judged, but usually will adopt wired passage such as optical fiber to communicate, and all has variety of issue at aspects such as cost, wiring, networking, maintenances, causes in the communication network development investment big and need a large amount of hardware modification cost inputs.Second class methods basically need not be new investment, but when utilizing the information of fault phone to carry out fault location, because the user does not understand the power distribution network specifying information; So need complaint call from customers is carried out examination; And the examination mode only is suitable for a specific distribution network, and adaptability is bad, ought run into sudden simultaneously; When accident caused communication failure on a large scale, this method was with inoperative.
Domestic also have many producers or research institution to propose the notion of power distribution network " house dog " and develop some Related products.But some drawbacks below existing have influenced actual result of use.The product of the producer that has adopts analog design, and zero sequence ground connection is adopted fixing definite value, can not adjust with different system situation, when system operation mode changes, the situation of tripping or misoperation can occur.Some product lacks communication mode, perhaps adopts wired serial interface communication mode, can not greatly reduce the efficient of repair and maintenance timely and effectively with giving the maintainer on the fault message.Present product all is based on the design of independent on-load switch controller function, lacks the system applies function, can not realize that system-wide real-time state monitoring, topological diagram show and ADVANCED APPLICATIONS such as accident analysis.
Summary of the invention
The utility model is to the deficiency of above-mentioned prior art; Provide a kind of reliable and low current grounding that communication mode is various to detect and spacer assembly, the present invention also provides the comprehensive low current grounding of a kind of application function to detect and shielding system simultaneously.
The utility model is realized through following technical scheme:
A kind of low current grounding detects and spacer assembly, comprises data acquisition module, communication module and processor module; Data acquisition module all links to each other with processor module with communication module; Processor module links to each other with the trip circuit of demarcation switch; Data acquisition module is used for real-time measurement circuitry data; Communication module is used to send and receive information; Processor module judges whether to take place low current grounding according to the measurement data of data acquisition module, if the demarcation switch tripping operation of then controlling said circuit is with isolated fault, and the triggering communication module is sent fault message;
It is characterized in that said communication module adopts communication to send and receive information.
Further, said communication module is through GPRS mode and host computer interactive information, through GSM short message mode and maintainer's interactive information.
Further, after said communication module receives solicited message, trigger processor module and resolve described request information, if query requests, processor module then triggers communication module and sends request results; If control request, processor module are then carried out said control request.
Further, processor module judges whether that the method that low current grounding takes place is: if the zero-sequence current of circuit is more than or equal to I0set, and do not satisfy alternate overcurrent condition, be judged as earth fault in the boundary; If the zero-sequence current of circuit less than I0set, and does not satisfy alternate overcurrent condition greater than 0, be judged as out-of-bounds earth fault; Otherwise, be judged as fault-free; Wherein, I0set is the ground connection zero sequence definite value that is provided with in advance.
The present invention also provides a kind of detection and shielding system of low current grounding; It comprises that host computer and a plurality of low current grounding detect and spacer assembly, and each low current grounding detects with spacer assembly and all carries out radio communication through said communication module and said host computer.
Further, said host computer comprises CPU, and the memory cell that all links to each other with CPU, GPRS unit, input unit, display unit, Alarm Unit and administrative unit; Memory cell is used to store the real time data of each unit; The GPRS unit is used for detecting with a plurality of low current groundings and spacer assembly communicates, and as the GPRS data processing centre of a plurality of low current groundings detections with spacer assembly; Input unit is used to receive user's input; Display unit is used for graphical interfaces mode display message; Alarm Unit is used to send alarm, and fault message is sent to the maintainer with the GSM way of short messages; Administrative unit comprises Report Server Management unit and service management unit, and the Report Server Management unit is used to generate the several data form, and service management unit is used for giving different rights of using to the user.
When 10kV distribution line generation low current grounding, the described low current grounding of the utility model detect can detect rapidly with spacer assembly and isolated fault interval, guarantee that non-failed subs criber is not influenced by involving of failed subs criber and causes power failure.Simultaneously, fault message in time is sent to host computer through the GPRS mode, perhaps, has improved the speed and the efficient of trouble shoot and solution greatly, shortened customer outage hours, improved power supply reliability through GSM SMS notification maintainer.
A plurality of low current groundings by installing at 10kV distribution line user T access port place (power supply department and user's responsibility separation just) detect and spacer assembly, and a shared host computer of multiple arrangement has been formed described low current grounding detection of the utility model and shielding system.The host computer of this system is as the background monitoring platform; Setting or modification, the real-time demonstration of fault message, the fault message that can realize definite value changes multiple application such as GSM SMS notification and demarcation switch remote control deciliter; For fast processing fault, load switching etc. provides science, accurate data foundation, thereby effectively promoted the intelligent level of power distribution network.
Description of drawings
Fig. 1 is the structure chart of low current grounding detection with spacer assembly;
Fig. 2 is a GPRS wireless communication principles sketch map;
Fig. 3 is the structure chart of low current grounding detection with shielding system;
Fig. 4 is the structure chart of host computer.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
The utility model provides a kind of low current grounding to detect and spacer assembly; This device is installed in 10kV distribution line user T access port place; (fault is in its inlet wire section when the inner generation of user's branched line single phase ground fault; Or fault is inboard at the subscriber's drop switch), this device can be promptly and accurately positions and isolates earth fault the fault point, thereby can greatly reduce the power failure area.
As shown in Figure 1, the described low current grounding of the utility model detects with spacer assembly and comprises data acquisition module 1, communication module 2 and processor module 3.Data acquisition module 1 all links to each other with processor module 3 with communication module 2, and processor module 3 links to each other with the trip circuit of demarcation switch 4.Data acquisition module 1 is used for real-time measurement circuitry data, and said track data comprises the running status of zero-sequence current, residual voltage and demarcation switch etc.Data acquisition module 1 adopts outer 16 the A/D chips of high accuracy of sheet, disposes high-precision zero sequence current mutual inductor and zero sequential potential transformer simultaneously, thus accurate measurement circuitry data.Communication module 2 adopts communication to send and receive information, and its process of sending information is triggered by processor module 3, and the information of transmission comprises the track data information that fault message and data acquisition module 1 detect etc.Processor module 3 judges whether to take place low current grounding according to the measurement data of data acquisition module 1; If; Demarcation switch 4 tripping operations of then controlling said circuit are with isolated fault; And trigger communication module 2 and send fault message, said fault message comprises positional information, zero-sequence current, residual voltage and the fault recorder data etc. of demarcation switch 4.Processor module 3 adopts 32 bit processors, and configuration high capacity FLASH and RAM, with the problem of solution information record and failure wave-recording storage.
Preferably, judge whether in the utility model that the method that low current grounding takes place is: if the zero-sequence current of circuit is more than or equal to I0set, and do not satisfy alternate overcurrent condition, be judged as earth fault in the boundary; If the zero-sequence current of circuit less than I0set, and does not satisfy alternate overcurrent condition greater than 0, be judged as out-of-bounds earth fault; Otherwise, be judged as fault-free; Wherein I0set is the ground connection zero sequence definite value that is provided with in advance.The value of I0set should satisfy I02<I0set<I01, and considers a safety factor and margin of safety, as gets I0set=2 I02.I01 is an earth fault when occurring in the demarcation switch load side, the zero-sequence current that zero sequence current mutual inductor detects; I02 is an earth fault when occurring in the demarcation switch mains side, the zero-sequence current that zero sequence current mutual inductor detects.If the load side circuit is a cable, then will be according to after actual cable electric capacity calculating I01 value and the I02 value, whether the relation between checking I02, I0set, the I01 three satisfies I02<I0set<I01, to guarantee to judge the accuracy of earth fault.Certainly, the utility model is not limited to and adopts this kind method to judge whether to send low current grounding, can also adopt additive method.
Preferably, for by existing equipment, the GSM/GPRS wireless network that public network is moved in the utility model utilization carries out wireless data transmission, this wireless communication technology mature and reliable and invest little, receive the influence of environment and occasion little, have very high practical value.GPRS is as expert data transmission system network support platform, and the binding data encryption technology ensures that the safety of Network Transmission realizes that the expert data transmission system is preferable selection.As shown in Figure 2, the basis of GPRS is to carry out the transmission of data with the form of IP bag, when the GPRS wireless terminal gets into GPRS network, just is attached on the Internet automatically.So this transmission means does not need GPRS provider to provide more service just can pass to data processing centre to data from any GPRS covering area with supporting.Present stage GPRS service mainly provides the transmission service of single-point to multiple spot, refers to that promptly a plurality of GPRS wireless data terminals (DTU) are transfer of data to a fixing GPRS data processing centre.The utility model is with the data processing centre of host computer as GPRS, and described communication module is through GPRS mode and host computer interactive information.Simultaneously; Deficiency for fear of the single communication mode; Adapt to the actual operating position of different user, the utility model can also pass through GSM short message mode and maintainer's interactive information, and the easy access personnel in time understand fault message; Make troubleshooting fast, saved the maintenance cost of power equipment greatly.
Preferably, the described low current grounding of the utility model detects with spacer assembly and also supports remote inquiry and controlled function, and promptly long-range host computer or maintenance personal pass through the transmission way of short messages, can send query requests and control request to it.After communication module 2 receives solicited message; Trigger processor module 3 and resolve described request information; If query requests, 3 of processor modules trigger communication module 2 and send request results, thereby are that host computer or maintenance personal provide sufficient circuit running state information.If control request, 3 of processor modules are carried out said control request.
Preferably, the described low current grounding of the utility model detects with spacer assembly also has the RS232 communication interface, can realize the modification of special parameter or special definite value through this interface, but and the running status of monitoring arrangement.This device is reserved the RS485 communication interface simultaneously and is used as subsequent use communication.
The utility model also provides a kind of detection and shielding system of low current grounding; As shown in Figure 3; It comprises that host computer and a plurality of low current grounding detect and spacer assembly; A plurality of low current groundings detect with spacer assembly and are installed in 10kV distribution line user T access port place; Each low current grounding detects with spacer assembly and all communicates through said communication module and said host computer, and host computer can detect with spacer assembly many low current groundings and carry out unified management and monitoring as the background monitoring platform.
As shown in Figure 4, said host computer comprises CPU, and the memory cell that all links to each other with CPU, GPRS unit, input unit, display unit, Alarm Unit and administrative unit.Memory cell is used to store the real time data of each unit; The GPRS unit is used for detecting with a plurality of low current groundings and carries out GPRS with spacer assembly and communicates by letter, and as the data processing centre of a plurality of GPRS wireless data terminals (being low current grounding detection and spacer assembly).Input unit is used to receive user's input, and said input comprises object, the content of uploading, revising of definite value and download, control command and issues etc.The object of said control command is meant which demarcation switch of Long-distance Control, and content is meant that the control demarcation switch breaks off or closure.Display unit is used for showing with the mode of graphical interfaces the result of fault message and query requests, and all right display system terminal module distribution frame figure and fault recorder data etc. are so that monitor staff's analyzing and processing.The result of said query requests is regularly sent the query requests of poll and obtains to each demarcation switch by host computer, and wherein the content of query requests comprises current and voltage data and switch running status etc., and query requests is sent through the GPRS unit.Alarm Unit is used to send alarm, and fault message is sent to the maintainer with the GSM way of short messages, easy access personnel fast processing.The mode that the GSM note of sending host computer can adopt has built-in gsm communication module, external short message to receive alert machine, external AN791 GSM/GPRS communicator or passes through the detection and the spacer assembly forwarding data of low current grounding, and above multiple mode need be confirmed by user's actual demand.Administrative unit comprises Report Server Management unit and service management unit, and the Report Server Management unit is used to generate the several data form, comprises real time execution form, fault warning record form, voltage, electric current record form etc., and can realize report printing; Service management unit can be given different rights to the user of different stage, thus fail safe and the reliability of assurance system in running.
The utility model not only is confined to above-mentioned embodiment; Persons skilled in the art are according to the disclosed content of the utility model; Can adopt other multiple embodiment embodiment of the present invention, therefore, project organization of every employing the utility model and thinking; Do some simple designs that change or change, all fall into the scope of the utility model protection.

Claims (5)

1. a low current grounding detects and spacer assembly, comprises data acquisition module, communication module and processor module; Data acquisition module all links to each other with processor module with communication module; Processor module links to each other with the trip circuit of demarcation switch; Data acquisition module is used for real-time measurement circuitry data; Communication module is used to send and receive information; Processor module judges whether to take place low current grounding according to the measurement data of data acquisition module, if the demarcation switch tripping operation of then controlling said circuit is with isolated fault, and the triggering communication module is sent fault message;
It is characterized in that said communication module adopts communication to send and receive information.
2. low current grounding according to claim 1 detects and spacer assembly, it is characterized in that, said communication module is through GPRS mode and host computer interactive information, through GSM short message mode and maintainer's interactive information.
3. low current grounding according to claim 1 detects and spacer assembly; It is characterized in that, after said communication module receives solicited message, trigger processor module and resolve described request information; If query requests, processor module then trigger communication module and send request results; If control request, processor module are then carried out said control request.
4. the detection of a low current grounding and shielding system; It is characterized in that; It comprises host computer and a plurality of like arbitrary described low current grounding detection of claim 1-3 and spacer assembly, and each low current grounding detects with spacer assembly and all carries out radio communication through said communication module and said host computer.
5. the detection of low current grounding according to claim 4 and shielding system is characterized in that, said host computer comprises CPU, and the memory cell that all links to each other with CPU, GPRS unit, input unit, display unit, Alarm Unit and administrative unit; Memory cell is used to store the real time data of each unit; The GPRS unit is used for detecting with a plurality of low current groundings and spacer assembly communicates, and as the GPRS data processing centre of a plurality of low current groundings detections with spacer assembly; Input unit is used to receive user's input; Display unit is used for graphical interfaces mode display message; Alarm Unit is used to send alarm, and fault message is sent to the maintainer with the GSM way of short messages; Administrative unit comprises Report Server Management unit and service management unit, and the Report Server Management unit is used to generate the several data form, and service management unit is used for giving different rights of using to the user.
CN2011203986993U 2011-10-19 2011-10-19 Small-current grounding fault detecting and isolating device and system Expired - Lifetime CN202333779U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103036881A (en) * 2012-12-11 2013-04-10 广东电网公司电力调度控制中心 System for unified configuration of isolation devices
CN107677977A (en) * 2017-11-18 2018-02-09 广西电网有限责任公司电力科学研究院 A kind of long-distance monitoring method of portable electric energy mass-synchrometer
CN111624440A (en) * 2020-05-26 2020-09-04 襄阳科能机电设备有限公司 Single phase grounding fault line selection device in neutral point through arc suppression coil grounding system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103036881A (en) * 2012-12-11 2013-04-10 广东电网公司电力调度控制中心 System for unified configuration of isolation devices
CN103036881B (en) * 2012-12-11 2016-06-08 广东电网公司电力调度控制中心 A kind of methods, devices and systems to the unified configuration of disrupter
CN107677977A (en) * 2017-11-18 2018-02-09 广西电网有限责任公司电力科学研究院 A kind of long-distance monitoring method of portable electric energy mass-synchrometer
CN111624440A (en) * 2020-05-26 2020-09-04 襄阳科能机电设备有限公司 Single phase grounding fault line selection device in neutral point through arc suppression coil grounding system

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Granted publication date: 20120711