CN202330598U - Long-distance monitoring system for transformer substation arrester - Google Patents

Long-distance monitoring system for transformer substation arrester Download PDF

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Publication number
CN202330598U
CN202330598U CN2011204932026U CN201120493202U CN202330598U CN 202330598 U CN202330598 U CN 202330598U CN 2011204932026 U CN2011204932026 U CN 2011204932026U CN 201120493202 U CN201120493202 U CN 201120493202U CN 202330598 U CN202330598 U CN 202330598U
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China
Prior art keywords
monitoring server
node
sample data
voltage
monitoring
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Expired - Fee Related
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CN2011204932026U
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Chinese (zh)
Inventor
倪勇
顾黎明
周密
孙世平
金益迥
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Zhejiang Electric Power Co ltd Taizhou Electric Power Bureau
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Zhejiang Electric Power Co ltd Taizhou Electric Power Bureau
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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
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

The utility model aims to provide a long-distance monitoring system for a transformer substation arrester. The long-distance online monitoring system comprises a wireless sensor network, monitoring servers and long-distance clients, wherein the long-distance clients are connected with and communicate with the monitoring servers by networks; the wireless sensor network is a wireless network consisting of a plurality of PT (potential transformer) voltage collecting nodes, leakage current collecting nodes, route relay nodes and gateway nodes; and the monitoring servers carry out DFT (discrete Fourier transform) processing on voltage sample data and current sample data to obtain the phase difference between current and voltage, full current amplitude and effective value, capacitive component and resistive component. In a power system, the arrester is main over-voltage protection equipment, and the working states of the arrester can be conveniently and rapidly monitored through long-distance monitoring, thus providing reliable guarantee for stable operation of the power system.

Description

The remote supervision system of transformer station's lightning arrester
Technical field
The utility model relates to transformer station's lightning arrester monitoring technical field, relates in particular to a kind of technology that is used for the Zinc-Oxide Arrester monitoring of wireless sensor network.
Background technology
The thunder and lightning disaster accident occupies very big proportion in the tripping operation power outage of electric system in modern times.Particularly be accompanied by the development of switching technique, the minimizing of the reduction of Past Voltage within Power System and the accident that causes thereof, thus the accident rate that makes thunderbolt cause further improves.Wherein, transformer station and transmission line of electricity are the districts occurred frequently of lightning hazards, so before the high-tension line of electric system delivers to converting equipment, should be equiped with the complete lightning protection device of a cover.Lightning arrester is protection power equipment security of operation, prevents the important device that lightning strike accident takes place.
The mechanical type reometer that generally adopts at present can only be observed full leakage current, can't distinguish capacitive and resistive composition.Though and portable test can be measured resistive current component comparatively exactly, can't accomplish all-weather real-time monitoring in 24 hours.Fieldbus Based monitoring scheme, though used various isolation technologies, the security of this type systematic own is not very high.Because power supply unavoidably uses cable to be connected with communication, the inefficacy of indivedual monitoring nodes can be diffused into total system, even maybe the thunderbolt energy be incorporated into central control room, and therefore the possibility of the hidden danger that causes huge accident is arranged.
The utility model content
The purpose of the utility model provides the remote supervision system of a kind of transformer station lightning arrester.
The utility model provides the remote supervision system of a kind of transformer station lightning arrester; Said remote online monitoring system comprises wireless sensor network, monitoring server and Terminal Server Client, and said Terminal Server Client is connected with said monitoring server through network and communicates by letter;
Said wireless sensor network is the wireless network of being made up of a plurality of PT voltage acquisition nodes, leakage current collection node, route via node and gateway node;
Wherein, said PT voltage acquisition node is gathered the voltage sample data according to the instruction of said monitoring server, and through said route via node and said gateway node said voltage sample data is sent to said monitoring server;
Said leakage current collection node is gathered the current sample data according to the instruction of said monitoring server, and through said route via node and said gateway node said current sample data is sent to said monitoring server;
Said route via node is set up the routing iinformation between said PT voltage acquisition node 111, said leakage current collection node and the said monitoring server;
Said wireless sensor network of said gateway node bridge joint and said monitoring server; Make said wireless sensor network accept instruction, and transmit said voltage sample data and said current sample data to said monitoring server based on said instruction from said monitoring server;
Said monitoring server carries out DFT to said voltage sample data and said current sample data to be handled and draws the phase differential between electric current and the voltage, circuital amplitude and effective value, capacitive and resistive component.
Preferably, said monitoring server also comprises warning device, and said monitoring server determines whether triggering said warning device according to the alarming threshold value of said default.
More preferably, the user sets said alarm threshold value through said Terminal Server Client, comprises the alarming threshold value of phasing degree, total current and current in resistance property.
Along with sensor technology, embedded computing technique, computer technology and development of wireless communication devices, the combination of the electric system and the communication technology makes long-range reading of data become possibility.In electric system, lightning arrester is main overvoltage protection equipment, and remote monitoring can be monitored the duty of lightning arrester easily and efficiently, thereby reliable guarantee is provided for the operation of power system stability.
In order to protect electrical equipment in the electric system to avoid the infringement of atmospheric over-voltage and switching overvoltage, lightning arrester has played indelible contribution, so the quality of on-line monitoring lightning arrester is just particularly importantly existing.Develop rapidly for present electrical network; Transformer station follows its production that puts into operation closely; And under the relative a limited number of situation of operations staff; Realization remote monitoring lightning arrester can alleviate operations staff's workload greatly increases work efficiency, and make lightning arrester can better protect the power equipment security of operation, prevent that lightning strike accident from occurring on the important device, thus stable, safe operation stable more, the reliable guarantee electric system.
Two principal elements of the dirigibility of sensor and cost are promoting the development of wireless sensor network.It is suitable especially on wireless sensor network technology is applied in the arrester on-line monitoring system.The collection of each voltage and electric current all is by an independently network node completion; The fault of any one node can not cause the collapse of whole monitoring network; Can lightning current not introduced the pulpit yet; So bring any extra risk can for the electrical substation monitoring system, have the system reliability of height.Wireless monitor system need not cable laying, electric wire, has greater flexibility naturally than legacy network, is easy to the expansion upgrading.Simultaneously, dirigibility has also brought the reduction of cost.Except the cost of cable, system configuration and installation, maintenance have all reduced cost.
Description of drawings
Fig. 1 illustrates the topological diagram according to the remote supervision system of transformer station's lightning arrester of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
At present, metal oxide arrester has obtained using widely in electric system, and it is as the overvoltage protection of power equipment, and operation plays a part very big to power equipment safety.Lightning arrester produces leakage current under the working voltage effect, comprise capacity current and current in resistance property, and wherein the size of capacity current only is distributed with meaning to voltage, does not influence heating, and current in resistance property then is the true cause that causes the metal oxide resistance heating.
Zinc oxide nonlinear resistance slice is to be on the basis of main material again with zinc paste, attaches other metal oxides with trace, and at high temperature the combustion knot forms.The nonlinear characteristic of zinc oxide resistance sheet depends primarily on grain boundary layer, and its resistivity is very high under low electric field: when the interlayer electric potential gradient reached 104~105V/cm, its resistivity dropped sharply to low resistance state.The specific inductive capacity of grain boundary layer is about 1000~2000, so there is bigger natural capacity in zinc oxide resistance sheet.
Under the normal working voltage, the electric current that flows through zinc oxide resistance sheet is merely microampere order, but because the deterioration of valve block, the leakage current that causes flowing through valve block increases.In addition, because the lightning arrester dysplasia, poorly sealed inside and the valve block of making makes moist, and also can cause the increase of leakage current of an arrester in service.The rapid increase of resistive component in the electric current can make the valve block temperature rise and thermal runaway takes place, and when serious, even causes the explosion accident of lightning arrester.Therefore through measuring total current, the current in resistance property comparative analysis of Zinc-Oxide Arrester under working voltage; Just can in time find the inner defective that exists of lightning arrester, reflect this lightning arrester make moist situation and degree of aging and can continue an important criterion of reliability service as this equipment.
The utility model is through sensor, accomplishes the monitoring to the parameter of Zinc-Oxide Arrester work, and data are processed into digital signal, is transferred to the transformer substation computer Ethernet, carries out remote monitoring by master-control room monitoring terminal or collection control center monitors terminal.
As shown in Figure 1, the remote supervision system of transformer station's lightning arrester comprises wireless sensor network 11, monitoring server 12 and Terminal Server Client 13.Wherein, wireless sensor network 11 is the 2.4GHZ wireless network of being made up of a plurality of PT voltage acquisition node 111, leakage current collection node 112, route via node 113, gateway node 114; Monitoring server 12 comprises warning device; Terminal Server Client 12 is connected with monitoring server 12 through network and communicates by letter.
Wireless sensor network 11 is a wireless networks; Form by a plurality of PT voltage acquisition node 111, leakage current collection node 112, route via node 113 and gateway node 114; And the operation upper computer software is realized function corresponding on each node, such as data acquisition, data analysis etc.The PT voltage acquisition node 111 of space distribution, leakage current collection node 112 are monitored surrounding environment through being connected with sensor; And the data wireless that monitors is sent to gateway node 114; Gateway node 114 is connected with wired system, so just can the software of utilization and operation on each node be gathered, process, analyze and show by predetermined voltage, current data.Route via node 113 is a kind of special measured node, and it works to prolong distance and increases reliability in wireless sensor network 11.
PT voltage acquisition node 111 adopts DC power supplies, and its transformer-coupled circuit part is with sample to the rear end input of modulate circuit of PT side voltage matches.Its core is to be integrated with MCU control nuclear, RF transmission-receiving function, AD sampling function, the module of IO control function, and highly integrated reduced cost, improved stability simultaneously.MCU control nuclear receives the monitored instruction from monitoring server 12 through RF, starts the AD sampling, and the voltage sample data are sent back monitoring server 12 through RF.The application software of MCU can be carried out aerial upgrade and debugging to it through wireless network.
Leakage current collection node 112 adopts powered battery, by current transformer sampling leakage current signal.Leakage current collection node 112 has taken into full account the characteristic of low-power consumption on hardware circuit design, the characteristic of the integral body of software design and wireless sensor network 11 sleep simultaneously guarantees serviceable life of battery effectively.
Route via node 113 is responsible for the initialization of wireless sensor network 11, sets up the routing iinformation between PT voltage acquisition node 111, leakage current collection node 112 and the monitoring server 12, has increased the 2.4G wireless signal strength simultaneously, has prolonged communication distance.
Gateway node 114 bridge joints wireless sensor network 11 and monitoring server 12; Among the management that is in monitoring server 12 and monitoring that the feasible any node that is in the wireless sensor network can both be transparent; Make said wireless sensor network receive instruction, and transmit voltage sample data and current sample data to monitoring server 12 based on said instruction from monitoring server 12.
The utility model adopts C/S model (Client/Server on monitoring mode; Client/server); Terminal Server Client 13 is responsible for mutual with the user, collects user profile, through network to monitoring server 12 requests to such as information processing work such as database, electrical form or documents.
The monitoring software of operation adopts the client-server framework on the monitoring server 12.The labview server program that operates on the monitoring server 12 is the core of system.When each polling cycle arrives; Monitoring server 12 is at first broadcasted wakeup message; Wake the PT voltage acquisition node 111 and leakage current collection node 112 of all sleeps up; Next broadcasts the message initiated PT voltage acquisition of sample-synchronous node 111 and leakage current collection node 112 image data samples; After the current sample data of voltage sample data of collecting neat all PT voltage acquisition nodes 111 collections and 112 collections of leakage current collection node, broadcasting sleep synchronization message requires all PT voltage acquisition nodes 111 and leakage current collection node 112 entering sleep low-power consumption modes.Monitoring software carries out DFT to voltage sample data and current sample data to be handled and draws the phase differential between electric current and the voltage; Circuital amplitude and effective value; Capacitive and resistive component, and determine whether triggering warning device according to the alarming threshold value of default.
At Terminal Server Client 13; The user behind login window input number of the account and password, can sign in to the man-machine interface of monitoring server 12 via the WEB network address of browser key entry monitoring server 12; Can check the state of lightning arrester whenever and wherever possible; Comprise real-time polar plot of every phase leakage current and phasing degree value, check and analysis module, can check the data information of arbitrary time period through historical record.
User with administrator right also can set the alarming threshold value of phasing degree, total current and current in resistance property through Terminal Server Client 13, eliminates photoelectric alarm etc.
To those skilled in the art, obviously the utility model is not limited to the details of above-mentioned example embodiment, and under the situation of spirit that does not deviate from the utility model or essential characteristic, can realize the utility model with other concrete form.Therefore; No matter from which point; All should regard embodiment as exemplary; And be nonrestrictive, the scope of the utility model is limited accompanying claims rather than above-mentioned explanation, therefore is intended to the implication of the equivalents that drops on claim and all changes in the scope are included in the utility model.

Claims (2)

1. the remote supervision system of transformer station's lightning arrester; Said remote online monitoring system comprises wireless sensor network, monitoring server and Terminal Server Client; Said Terminal Server Client is connected with said monitoring server through network and communicates by letter, and it is characterized in that:
Said wireless sensor network is the wireless network of being made up of a plurality of PT voltage acquisition nodes, leakage current collection node, route via node and gateway node;
Wherein, said PT voltage acquisition node is gathered the voltage sample data according to the instruction of said monitoring server, and through said route via node and said gateway node said voltage sample data is sent to said monitoring server;
Said leakage current collection node is gathered the current sample data according to the instruction of said monitoring server, and through said route via node and said gateway node said current sample data is sent to said monitoring server;
Said route via node is set up the routing iinformation between said PT voltage acquisition node (111), said leakage current collection node and the said monitoring server;
Said wireless sensor network of said gateway node bridge joint and said monitoring server; Make said wireless sensor network accept instruction, and transmit said voltage sample data and said current sample data to said monitoring server based on said instruction from said monitoring server;
Said monitoring server carries out DFT to said voltage sample data and said current sample data to be handled and draws the phase differential between electric current and the voltage, circuital amplitude and effective value, capacitive and resistive component.
2. the remote supervision system of transformer station according to claim 1 lightning arrester is characterized in that:
Said monitoring server also comprises warning device, and said monitoring server determines whether triggering said warning device according to the alarming threshold value of said default.
CN2011204932026U 2011-12-01 2011-12-01 Long-distance monitoring system for transformer substation arrester Expired - Fee Related CN202330598U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102998521A (en) * 2012-10-11 2013-03-27 苏州爱知电机有限公司 Ground-current remote monitor for transformer cores
CN103066703A (en) * 2013-01-29 2013-04-24 南京信息工程大学 Intelligent SPD (Surge Protective Device) based on internet of things
CN103630769A (en) * 2013-07-11 2014-03-12 保定市超人电子有限公司 Online zinc oxide arrester monitoring instrument
CN105074679A (en) * 2013-01-07 2015-11-18 Abb公司 Developing, deploying and implementing power system computer applications
CN106646058A (en) * 2016-12-29 2017-05-10 郑州职业技术学院 Online monitoring system for lightning arrester
CN107091966A (en) * 2017-06-12 2017-08-25 国网辽宁省电力有限公司电力科学研究院 A kind of method for determining the maximum allowable resistive leakage current of Zinc-Oxide Arrester

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102998521A (en) * 2012-10-11 2013-03-27 苏州爱知电机有限公司 Ground-current remote monitor for transformer cores
CN105074679A (en) * 2013-01-07 2015-11-18 Abb公司 Developing, deploying and implementing power system computer applications
CN105074679B (en) * 2013-01-07 2019-10-08 Abb公司 System and method for developing, disposing and implementing the application of power system computation machine
CN103066703A (en) * 2013-01-29 2013-04-24 南京信息工程大学 Intelligent SPD (Surge Protective Device) based on internet of things
CN103630769A (en) * 2013-07-11 2014-03-12 保定市超人电子有限公司 Online zinc oxide arrester monitoring instrument
CN106646058A (en) * 2016-12-29 2017-05-10 郑州职业技术学院 Online monitoring system for lightning arrester
CN107091966A (en) * 2017-06-12 2017-08-25 国网辽宁省电力有限公司电力科学研究院 A kind of method for determining the maximum allowable resistive leakage current of Zinc-Oxide Arrester

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20120711

Termination date: 20201201