CN205029333U - Little electric wire netting intelligent protection device based on regional information - Google Patents
Little electric wire netting intelligent protection device based on regional information Download PDFInfo
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- CN205029333U CN205029333U CN201520818451.6U CN201520818451U CN205029333U CN 205029333 U CN205029333 U CN 205029333U CN 201520818451 U CN201520818451 U CN 201520818451U CN 205029333 U CN205029333 U CN 205029333U
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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
- Y04S40/124—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 wired telecommunication networks or data transmission busses
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model provides a little electric wire netting intelligent protection device based on regional information, power module supplies power to each module of device through power bus, analog quantity collection module, division income are left module, communication module, state analysis module and are protected the decision -making module through realizing the inside data interaction of device with data bus, and man -machine module and state analysis module communicate through RS485 bus connection within a definite time, wherein module and the real -time collection system operating information of communication module joint responsibility are left to analog quantity collection module, division income, and state analysis module protects tactfully according to the operating information who gathers, analytic system running state and adjustment, the protection decision -making module is responsible for judging according to information monitoring that the trouble is regional to make the tripping operation instruction of isolated fault, man -machine module is responsible for handling liquid crystal display and artifical the settlement. The utility model discloses can improve the reliability and the selectivity of the action of little electric wire netting protection device.
Description
Technical field
The utility model belongs to technical field of electric power, relates to a kind of micro-capacitance sensor intelligent protection device based on area information.
Background technology
Lasting, stable, the reliability service of electrical network, be unable to do without the support of protective relaying device.Once there be fault to occur, protective device can detect fault component rapidly, reliably, failure judgement region, nearby tripping switch, and isolated fault region, reduces power failure range as far as possible.The scheme that what traditional protective device for low voltage electric network adopted is all " off-line setting calculation "; gather the voltage of single element, electric current and switching-state information; through calculating the operational factor of some reflection system statuses; then comparing with the definite value of calculated off-line, meeting operation condition just according to exporting trip signal the operate time of adjusting.Because the size and Orientation of the fault current of micro-capacitance sensor is by system grid connection/affect very large from Running State and distributed power source running status; traditional off-line setting calculation scheme is difficult to the protection demand meeting micro-capacitance sensor, is easy to cause false protection or tripping when micro-grid operation mode changes.
One large feature of micro-capacitance sensor still to continue to maintain the power supply of net internal loading, significantly improves the power supply reliability of system, if protective device often nonaction occurs, reduces power supply reliability, just run counter to the original idea of building micro-capacitance sensor.In addition, the general cost of the distributed power source in micro-capacitance sensor is higher, if protective device tripping when breaking down, will damage equipment, and have a strong impact on equipment life.Therefore, the reliability how improving micro-capacitance sensor protective device is still a great problem of puzzlement micro-capacitance sensor development.
Utility model content
The purpose of this utility model is to provide a kind of micro-capacitance sensor intelligent protection device based on area information; this device is different from the scheme that conventional apparatus gathers single element state and protection definite value off-line setting calculation; based on electrical power system wide-area protection philosophy; by the running status of acquisition system running status and each distributed power source; adaptive adjustment Preservation tactics; the fault current that can solve micro-capacitance sensor, by a difficult problem for system grid connection/affect from Running State and distributed power source running status, improves reliability and the selectivity of protective device action.
Technical solution of the present utility model is: a kind of micro-capacitance sensor intelligent protection device based on area information, comprises analogue collection module, input and output module, communication module, state analyzing module, protection decision-making module, man-machine module and power module; Wherein power module is powered to each module of device by power bus; Wherein analogue collection module, input and output module, communication module, state analyzing module and protection decision-making module are by the data interaction with data/address bus implement device inside, and man-machine module is communicated with being connected by RS485 bus between state analyzing module; Wherein analogue collection module, input and output module and communication module are responsible for real-time acquisition system operation information jointly, and state analyzing module is according to the operation information gathered, and analytical system running status also adjusts Preservation tactics; The operation information finally protecting decision-making module to be responsible for according to gathering judges that system is with or without breaking down, and judges fault zone, and makes the trip command of isolated fault; Man-machine module in charge process liquid crystal display and manually setting.
Further, both obtained system cloud gray model information by the directly mode of adopting, the mode also by communicating with merge cells obtains system cloud gray model information, can support the power distribution network main flow communication protocols such as 101,103,104 and 61850.
Further, wherein analogue collection module and switch module of coming in and going out all has one or have more than one at least.
Further, by information such as communication network shared system running statuses between each device, system extension is realized easily.
Based on a micro-capacitance sensor intelligent protection device for area information, using directional over-current protection as main protection, low pressure is as enabling signal.Device comprises state acquisition module, communication module, state analyzing module and protection decision-making module.Wherein, state acquisition module in charge collects voltage, the current information that in protection zone, each voltage transformer summation current transformer gathers, and the position of the switch information of each switch.Communication module is responsible for receiving the equipment running status information that also Treated Base collecting unit is uploaded; if micro-capacitance sensor designs according to intelligent substation thinking; the information such as voltage, electric current that this module also wants Treated Base merge cells to upload, and pass on the protection trip command that decision-making module issues to switch.State analyzing module is responsible for, according to the system grid connection/from Running State and distributed power source running status grasped, adjusting overcurrent protection direction of action and the definite value at each switch place.Protection decision-making module, according to the voltage and current information of Real-time Collection, judges with or without breaking down in protection zone, and finds out fault point, issue trip command to respective switch.
A kind of micro-capacitance sensor intelligent protection device based on area information of the utility model; both system cloud gray model information was obtained by the directly mode of adopting; also the mode by communicating with merge cells obtains system cloud gray model information, can support the power distribution network main flow communication protocols such as 101,103,104 and 61850.
The utility model is using low pressure as protection enabling signal, and directional over-current protection is as main protection.Only have low-voltage and electric current excessive, and when being positive direction, protection just understands action, prevents false protection as far as possible; First need to pre-establish take under micro-capacitance sensor is in different running method (comprise system grid connection/from the operating state of net state and distributed power source) cross flow path direction and definite value scheme; by device state analyzing module according to gather system cloud gray model information; when running into system branch and too much exceeding device acquisition capacity; multiple stage device can be adopted to form intelligent protection system; by information such as communication network shared system running statuses between each device, realize system extension easily.
The beneficial effects of the utility model are: change the situation that single element and protection definite value off-line setting calculation are only monitored in conventional low protection; the on-line monitoring to total system running status can be realized; and according to the change on-line tuning protection scheme of running status; and adopt low pressure as enabling signal; the sense of current is added as assistant criteria in overcurrent protection; substantially increase reliability and the selectivity of protection act, avoid the generation of false protection and misaction to greatest extent.
Accompanying drawing explanation
Fig. 1 is the explanation schematic diagram of the utility model embodiment;
Fig. 2 is the explanation schematic diagram of the utility model embodiment application scenarios.
Embodiment
Preferred embodiment of the present utility model is described in detail below in conjunction with accompanying drawing 1,2.
A kind of micro-capacitance sensor intelligent protection device based on area information of the present embodiment, comprises analogue collection module, input and output module, communication module, state analyzing module, protection decision-making module, man-machine module and power module; Wherein power module is powered to each module of device by power bus; Wherein analogue collection module, input and output module, communication module, state analyzing module and protection decision-making module are by the data interaction with data/address bus implement device inside, and man-machine module is communicated with being connected by RS485 bus between state analyzing module; Wherein analogue collection module, input and output module and communication module are responsible for real-time acquisition system operation information and complete to export by state analyzing module controlling jointly, state analyzing module is according to the operation information gathered, and analytical system running status also adjusts Preservation tactics; The operation information finally protecting decision-making module to be responsible for according to gathering judges that system is with or without breaking down, and judges fault zone, and makes the trip command of isolated fault; Man-machine module in charge process liquid crystal display and manually setting.
Application scenarios wherein shown in Fig. 2 is the grid type micro-grid system comprising the multiple distributed power sources such as wind-driven generator, diesel engine generator, energy-storage battery, photo-voltaic power supply; solid line is primary connection circuit; dotted line is the secondary connection of protection system, and K1-K6 is each branch switch.。
If micro-capacitance sensor breaks down when grid-connected, the fault current that the fault current that bulk power grid injects injects than distributed power source is much bigger, and overcurrent protection definite value determines primarily of the fault current injectability of bulk power grid; If micro-capacitance sensor is breaking down from during net, the fault current that the distributed power source of the electric rotating machine such as wind-driven generator and diesel engine generator type injects is relatively large, and overcurrent protection definite value determines primarily of their injectability.Storage battery and photo-voltaic power supply are the distributed power sources of inverter type, and owing to being subject to the restriction of power electronic equipment conveyance capacity, the ability injecting fault current is relatively little.Therefore overcurrent protection definite value answers according to the form below form to set.
The overcurrent protection extra current direction of the present embodiment as assistant criteria, to improve the selectivity of protection act.When micro-grid connection is run, if broken down outside system, the K1 in Fig. 1 should tripping, enters from net mode operation, and therefore the overcurrent protection of K1 should set that to flow out bus is positive direction.The inner each branch switch K2-K6 of microgrid should the just tripping when this branch road breaks down, and therefore also should set that to flow out bus be positive direction.
A kind of micro-capacitance sensor intelligent protection device based on area information of the present embodiment, in running, at any time according to the system cloud gray model information of collection and the operation information of distributed power source, selects suitable overcurrent protection definite value and direction.If detect following three conditions simultaneously meet and maintain a period of time, just send trip command to respective switch, thus realization reliably, isolated fault selectively.
1) electric current is greater than protection definite value;
2) sense of current is positive direction;
3) voltage is less than low voltage threshold value.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. based on a micro-capacitance sensor intelligent protection device for area information, it is characterized in that: comprise analogue collection module, input and output module, communication module, state analyzing module, protection decision-making module, man-machine module and power module; Wherein power module is powered to each module of device by power bus; Wherein analogue collection module, DC quantity acquisition module, input and output module, communication module, state analyzing module and protection decision-making module are by the data interaction with data/address bus implement device inside, and man-machine module is communicated with being connected by RS485 bus between state analyzing module; Wherein analogue collection module, input and output module and communication module are responsible for real-time acquisition system operation information and complete to export by state analyzing module controlling jointly, state analyzing module is according to the operation information gathered, and analytical system running status also adjusts Preservation tactics; The operation information finally protecting decision-making module to be responsible for according to gathering judges that system is with or without breaking down, and judges fault zone, and makes the trip command of isolated fault; Man-machine module in charge process liquid crystal display and manually setting.
2. a kind of micro-capacitance sensor intelligent protection device based on area information as claimed in claim 1; it is characterized in that: both obtained system cloud gray model information by the directly mode of adopting; also the mode by communicating with merge cells obtains system cloud gray model information, can support the power distribution network main flow communication protocols such as 101,103,104 and 61850.
3. a kind of micro-capacitance sensor intelligent protection device based on area information as claimed in claim 1, is characterized in that: wherein analogue collection module and switch module of coming in and going out all has one or have more than one at least.
4. a kind of micro-capacitance sensor intelligent protection device based on area information as claimed in claim 1, is characterized in that: by information such as communication network shared system running statuses between each device, realize system extension easily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520818451.6U CN205029333U (en) | 2015-10-22 | 2015-10-22 | Little electric wire netting intelligent protection device based on regional information |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520818451.6U CN205029333U (en) | 2015-10-22 | 2015-10-22 | Little electric wire netting intelligent protection device based on regional information |
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| CN205029333U true CN205029333U (en) | 2016-02-10 |
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| CN201520818451.6U Active CN205029333U (en) | 2015-10-22 | 2015-10-22 | Little electric wire netting intelligent protection device based on regional information |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706434A (en) * | 2019-10-22 | 2020-01-17 | 南京工程学院 | Man-machine interactive power transmission line fault monitoring and early warning system |
| CN116742596A (en) * | 2023-08-10 | 2023-09-12 | 石家庄科林电气股份有限公司 | Distributed feeder automatic protection method, distribution terminal, system and storage medium |
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2015
- 2015-10-22 CN CN201520818451.6U patent/CN205029333U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706434A (en) * | 2019-10-22 | 2020-01-17 | 南京工程学院 | Man-machine interactive power transmission line fault monitoring and early warning system |
| CN116742596A (en) * | 2023-08-10 | 2023-09-12 | 石家庄科林电气股份有限公司 | Distributed feeder automatic protection method, distribution terminal, system and storage medium |
| CN116742596B (en) * | 2023-08-10 | 2023-11-07 | 石家庄科林电气股份有限公司 | Distributed feeder automatic protection method, distribution terminal, system and storage medium |
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