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CN108963956A - A kind of Intellectualized Switchgear of high-voltage switch gear - Google Patents

A kind of Intellectualized Switchgear of high-voltage switch gear Download PDF

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Publication number
CN108963956A
CN108963956A CN201810687694.9A CN201810687694A CN108963956A CN 108963956 A CN108963956 A CN 108963956A CN 201810687694 A CN201810687694 A CN 201810687694A CN 108963956 A CN108963956 A CN 108963956A
Authority
CN
China
Prior art keywords
breaker
equipment
voltage switch
switch gear
acquisition control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810687694.9A
Other languages
Chinese (zh)
Inventor
陈志刚
刘东超
胡桂平
李海涛
熊慕文
须雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NR Electric Co Ltd
NR Engineering Co Ltd
Original Assignee
NR Electric Co Ltd
NR Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NR Electric Co Ltd, NR Engineering Co Ltd filed Critical NR Electric Co Ltd
Priority to CN201810687694.9A priority Critical patent/CN108963956A/en
Publication of CN108963956A publication Critical patent/CN108963956A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00Details of emergency protective circuit arrangements
    • H02H1/0061Details of emergency protective circuit arrangements concerning transmission of signals
    • H02H1/0084Details of emergency protective circuit arrangements concerning transmission of signals by means of pilot wires or a telephone network; watching of these wires
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25Arrangements specific to fibre transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/54Systems for transmission via power distribution lines

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Keying Circuit Devices (AREA)

Abstract

The invention discloses a kind of Intellectualized Switchgears of high-voltage switch gear, including breaker acquisition control equipment, breaker operator adaptive polarizing memory voltage time constant, disconnecting link acquisition control equipment, electronic mutual inductor, sensor and intelligent control device, the front end of the intelligent control device is connected with the rear end of breaker acquisition control equipment, disconnecting link acquisition control equipment, electronic mutual inductor and sensor respectively, and the breaker operator adaptive polarizing memory voltage time constant is connected with breaker acquisition control equipment;The present invention realizes intelligentized control method and the data acquisition, data sharing of conventional high-tension switch by the acquisition control equipment that is mounted on primary equipment, sensor, reduce the cable and connector quantity of primary equipment, improve the reliability and intelligent level of intelligent substation primary equipment, the manufacturing cost of high-voltage switch gear is reduced simultaneously, solves high-tension switch gear wiring complexity and technical problem difficult in maintenance.

Description

A kind of Intellectualized Switchgear of high-voltage switch gear
Technical field
The invention belongs to high-voltage switch gear technical fields, and in particular to a kind of Intellectualized Switchgear of high-voltage switch gear.
Background technique
High-tension switch gear is the important component in electric system primary equipment, for cutting off or being closed primary equipment No-load current and load current.The switching of primary equipment can be realized when normal operation by high-voltage switch gear.When certain in system When a part breaks down, by cooperating with relay protection, the faulty component in primary system can be cut off rapidly, protected The safe operation of card system no failure part, reduces scope of power outage, prevents fault spread.
Traditional substation's high-voltage switch equipment and measure and control device, relay protection, routine operation case etc. are secondary to be set Standby cooperation, all secondary devices are mounted on master control room, protective chamber, pass through electricity between high-tension switch gear signal and secondary device Cable point-to-point connection.
Intelligent substation high-voltage switch equipment and measure and control device, protective relaying device, intelligent terminal, combining unit etc. two Secondary device cooperation, measure and control device, protective relaying device are mounted on master control room, protective chamber, and intelligent terminal, combining unit are mounted on Collect in control cabinet on the spot, wherein intelligent terminal realizes the decentralization of routine operation box function, and combining unit realizes sampling functions Decentralization.Although the program reduces the cable connection between traditional substation's high-tension switch gear and secondary device, but high pressure Switch disconnector mechanism case every cutter mechanism case, earthing knife-switch mechanism case and collects that contact cable between control cabinet still more, and deposits The phenomenon that repeating bracing wire, field connection complexity is caused, many unreliable factors are brought.In addition current intelligent operation box It being installed in special primary equipment cabinet, various functions concentrate in the same device, and primary equipment cabinet narrow space, It is in actual motion maintenance and inconvenient.
Summary of the invention
To solve the above problems, the present invention proposes a kind of Intellectualized Switchgear of high-voltage switch gear, high-tension switch gear is realized Intelligentized control method, solve that high-tension switch gear wiring is complicated and technical problem difficult in maintenance.
The present invention adopts the following technical scheme that, a kind of Intellectualized Switchgear of high-voltage switch gear, which is characterized in that including open circuit Device acquisition control equipment, breaker operator adaptive polarizing memory voltage time constant, disconnecting link acquisition control equipment, electronic mutual inductor, sensor and intelligence Can control equipment, the front end of the intelligent control device respectively with breaker acquisition control equipment, disconnecting link acquisition control equipment, electricity Minor mutual inductor is connected with the rear end of sensor, the breaker operator adaptive polarizing memory voltage time constant and breaker acquisition control equipment phase Even, in which:
Breaker acquisition control equipment is mounted on outside high-voltage switch circuit breaker mechanism case, for acquiring circuit breaker position number Accordingly and the division of breaker controls, and sends data to intelligent control device;
Disconnecting link acquisition control equipment is mounted on outside high-voltage switch gear switch mechanism case, for acquire disconnecting link position data and Disconnecting link opening and closing control, and send data to intelligent control device;
Breaker operator adaptive polarizing memory voltage time constant is mounted on outside high-voltage switch circuit breaker mechanism case, for controlling for breaker acquisition Control equipment transmission monitoring data and the control instruction for realizing breaker acquisition control equipment;
Electronic mutual inductor is mounted in high-voltage switch circuit breaker tank body, for acquire electric mutual inductor current sensor and The output signal of voltage sensor is converted into digital data transmission to intelligent control device;
Sensor is mounted on primary equipment side, including SF6 sensor and displacement sensor, for measuring high-voltage switch gear SF6 Gas pressure and high-voltage switch contact run-length data, and send data to intelligent control device;
Intelligent control device is mounted on collecting in control cabinet on the spot for high-voltage switch gear, sets for receiving breaker acquisition control Standby, disconnecting link acquisition control equipment, the data of electronic mutual inductor and sensor transmissions, receive the high-voltage switch gear control of bay device System order, and communicated with protection measuring and controlling equipment.
Preferably, the intelligent control device is forwarded directly to open circuit for the high-voltage switch gear control command of bay device Device acquisition control equipment and disconnecting link acquisition control equipment, intelligent control device rear end send SV sampling to point mode by fiber optic point Data and GOOSE switching value data are to protecting measuring and controlling equipment.
Preferably, the breaker operator adaptive polarizing memory voltage time constant of the breaker acquisition control equipment and front end is in breaker mechanism By cable connection outside case, it is connect with the intelligent control device of rear end by optical fiber.
Preferably, the disconnecting link acquisition control equipment uses external socket connector type mounting means, and front end is that aviation terminal connects Mouthful, it is docked with the aviation terminal interface of primary equipment, rear end is connect with intelligent control device by optical fiber.
Preferably, the electronic mutual inductor is connect by optical fiber with intelligent control device, based on SV agreement with serial number The form of word optical signal exports data to intelligent control device.
Preferably, the sensor sends data to intelligent control device by RS485 serial communication mode.
It preferably, further include Temperature Humidity Sensor in the breaker acquisition control equipment, for measuring breaker acquisition Real time temperature and humidity data inside equipment are controlled, and sends data to intelligent control device.
It preferably, further include Temperature Humidity Sensor in the disconnecting link acquisition control equipment, for measuring disconnecting link acquisition control Real time temperature and humidity data inside equipment, and send data to intelligent control device.
Preferably, the operation that the breaker operator adaptive polarizing memory voltage time constant executes include: protection breaker tripping and closing, manual divide-shut brake, Circuit breaker position monitoring, closing circuit monitoring, trip circuit monitoring, closing a floodgate keeps function and relay tip monitoring, tripping to protect It holds function and signal monitoring and operation power monitoring and anti-bouncing function is closed in relay tip monitoring, hand.
It invents achieved the utility model has the advantages that the present invention is a kind of Intellectualized Switchgear of high-voltage switch gear, realizes high-voltage switch gear The intelligentized control method of equipment solves high-tension switch gear wiring complexity and technical problem difficult in maintenance;By being mounted on one Acquisition control equipment, sensor on secondary device realize intelligentized control method and the data acquisition, data sharing of conventional high-tension switch; The cable and connector quantity that primary equipment is reduced by all -fiber access of intelligent control device, it is primary to improve intelligent substation The reliability and intelligent level of equipment, while reducing the manufacturing cost of high-voltage switch gear;By the way of distribution installation, do not have There is special equipment cabinet, is installed near primary switch nearby, each equipment is a functional module, any one equipment It is abnormal not influence the function of other equipment, and the method directly replaced can be used and solve failure, it maintains easily.
Detailed description of the invention
Fig. 1 is Intellectualized Switchgear schematic diagram of the invention.
Specific embodiment
Below according to attached drawing and technical solution of the present invention is further elaborated in conjunction with the embodiments.
Fig. 1 is Intellectualized Switchgear schematic diagram of the invention,
A kind of Intellectualized Switchgear of high-voltage switch gear, breaker acquisition control equipment, breaker operator adaptive polarizing memory voltage time constant, knife Lock acquisition control equipment, electronic mutual inductor, sensor and intelligent control device, the front end of the intelligent control device respectively with Breaker acquisition control equipment, disconnecting link acquisition control equipment, electronic mutual inductor are connected with the rear end of sensor, the breaker Operational relay equipment is connected with breaker acquisition control equipment, in which:
Breaker acquisition control equipment is mounted on outside high-voltage switch circuit breaker mechanism case, with the breaker operator of front end after Electrical equipment, by cable connection, is connect with the intelligent control device of rear end by optical fiber outside circuit breaker mechanism case;
Breaker acquisition control equipment uses the component of high-protection level, meets outdoor service condition, by opening into returning Road acquires circuit breaker position, breaker operator adaptive polarizing memory voltage time constant feedback position and alarm signal etc., is broken by outputing circuit and realizing The division of road device controls;Real time temperature and humidity data inside breaker acquisition control equipment are measured by Temperature Humidity Sensor; Send data to intelligent control device;
Breaker operator adaptive polarizing memory voltage time constant is mounted on outside high-voltage switch circuit breaker mechanism case, logical with front end breaker mechanism Cable connection is crossed, and protection breaker tripping and closing, manual divide-shut brake, circuit breaker position are realized by the breaker acquisition control equipment of rear end Monitoring, closing circuit monitoring, trip circuit monitoring, close a floodgate keep function and relay tip monitoring, tripping keep function and after Position monitoring, hand close signal monitoring and operation power monitoring after the monitoring of electric appliance contact, conjunction;
It include motor energy storage electric loop and anti-jump loop in primary equipment breaker mechanism, but its relay for using Can be poor, breaker operator adaptive polarizing memory voltage time constant supports double jump circle, and has motor energy storage electric loop and anti-jump loop, substitution one Motor energy storage electric loop and anti-jump loop in secondary device breaker mechanism realize anti-bouncing function.
Isolation switch, grounding switch disconnecting link acquisition control equipment be mounted on outside high-voltage switch gear switch mechanism case, use External socket connector type installation, Front-end Design are directly docked, rear end at aviation terminal interface with the aviation terminal interface of primary equipment It is connect with intelligent control device by optical fiber;
Disconnecting link acquisition control equipment uses the component of high-protection level, meets outdoor service condition, passes through open entry loop Disconnecting link position, alarm signal etc. are acquired, realizes that the division of disconnecting link controls by outputing circuit, knife is measured by Temperature Humidity Sensor Real time temperature and humidity data inside lock acquisition control equipment;Send data to intelligent control device.
Electronic mutual inductor is mounted in high-voltage switch circuit breaker tank body, for acquire electric mutual inductor current sensor and The output signal of voltage sensor is converted into digital signal, then carries out integral transformation and restores tested current signal and tested electricity Signal is pressed, and is exported by IEC61850-9-2 agreement to intelligent control device.
Sensor is mounted on primary equipment side, including SF6 sensor and displacement sensor, for measuring high-voltage switch gear SF6 Gas pressure and high-voltage switch contact run-length data, and intelligent control is sent data to by RS485 serial communication mode and is set It is standby.
Intelligent control device is mounted on collecting in control cabinet on the spot for high-voltage switch gear, sets for receiving breaker acquisition control Standby, disconnecting link acquisition control equipment, the data of electronic mutual inductor and sensor, and communicated with protection measuring and controlling equipment;
Intelligent control device front end receives breaker acquisition control equipment, disconnecting link acquisition control by point-to-point optical fiber solutions The data of equipment and electronic mutual inductor acquisition equipment receive 4~20mA or 0~5V mode by the small signaling interface of analog quantity Sensing data;Control command is transmitted to intelligent control device by bay device, and is forwarded directly to by intelligent control device Breaker acquisition control equipment and disconnecting link acquisition control equipment protect whole group actuation time to shorten;Intelligent control device rear end SV sampled data and GOOSE switching value data are sent to protecting measuring and controlling equipment to point mode by fiber optic point.Intelligent control device By information sharing, the quantity of high-voltage switch gear spare contact is reduced, improves the reliability and intelligence water of high-tension switch gear It is flat.
The present invention is turned the signal of high-voltage switch gear and primary voltage current-mode analog quantity by the acquisition control equipment of site It changes digital quantity into, is communicated by optical fiber and cable with the intelligent control device collected in control cabinet on the spot is mounted on, reduced The quantity of high-voltage switch gear spare contact improves the reliability and intelligent level of high-tension switch gear.It can save simultaneously big The cable and connector of amount reduce cost of labor, to reduce the cost of high-voltage switch gear mechanism.
One embodiment of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (9)

1. a kind of Intellectualized Switchgear of high-voltage switch gear, which is characterized in that including breaker acquisition control equipment, breaker operator Adaptive polarizing memory voltage time constant, disconnecting link acquisition control equipment, electronic mutual inductor, sensor and intelligent control device, the intelligent control are set Standby front end respectively with breaker acquisition control equipment, disconnecting link acquisition control equipment, electronic mutual inductor and sensor rear end It is connected, the breaker operator adaptive polarizing memory voltage time constant is connected with breaker acquisition control equipment, in which:
Breaker acquisition control equipment is mounted on outside high-voltage switch circuit breaker mechanism case, for acquire circuit breaker position data with And the division control of breaker, and send data to intelligent control device;
Disconnecting link acquisition control equipment is mounted on outside high-voltage switch gear switch mechanism case, for acquiring disconnecting link position data and disconnecting link Division control, and send data to intelligent control device;
Breaker operator adaptive polarizing memory voltage time constant is mounted on outside high-voltage switch circuit breaker mechanism case, for setting for breaker acquisition control Standby transmission monitoring data and the control instruction for realizing breaker acquisition control equipment;
Electronic mutual inductor is mounted in high-voltage switch circuit breaker tank body, for acquiring electric mutual inductor current sensor and voltage The output signal of sensor is converted into digital data transmission to intelligent control device;
Sensor is mounted on primary equipment side, including SF6 sensor and displacement sensor, for measuring high-voltage switch gear SF6 gas Pressure and high-voltage switch contact run-length data, and send data to intelligent control device;
Intelligent control device is mounted on collecting in control cabinet on the spot for high-voltage switch gear, for receive breaker acquisition control equipment, Disconnecting link acquisition control equipment, the data of electronic mutual inductor and sensor transmissions receive the high-voltage switch gear control of bay device Order, and communicated with protection measuring and controlling equipment.
2. a kind of Intellectualized Switchgear of high-voltage switch gear according to claim 1, which is characterized in that the intelligent control is set It is standby that breaker acquisition control equipment and disconnecting link acquisition control are forwarded directly to for the high-voltage switch gear control command of bay device Equipment, intelligent control device rear end send SV sampled data and GOOSE switching value data to protection to point mode by fiber optic point Measuring and controlling equipment.
3. a kind of Intellectualized Switchgear of high-voltage switch gear according to claim 1 or 2, which is characterized in that the breaker The breaker operator adaptive polarizing memory voltage time constant of acquisition control equipment and front end passes through cable connection outside circuit breaker mechanism case, with rear end Intelligent control device pass through optical fiber connect.
4. a kind of Intellectualized Switchgear of high-voltage switch gear according to claim 1 or 2, which is characterized in that the disconnecting link is adopted Collection control equipment uses external socket connector type mounting means, and front end is aviation terminal interface, connects with the aviation terminal of primary equipment Mouth docking, rear end is connect with intelligent control device by optical fiber.
5. a kind of Intellectualized Switchgear of high-voltage switch gear according to claim 1 or 2, which is characterized in that the electronic type Mutual inductor is connect by optical fiber with intelligent control device, based on SV agreement in the form of serial digital optical signal by data export to Intelligent control device.
6. a kind of Intellectualized Switchgear of high-voltage switch gear according to claim 1 or 2, which is characterized in that the sensor Intelligent control device is sent data to by RS485 serial communication mode.
7. a kind of Intellectualized Switchgear of high-voltage switch gear according to claim 1, which is characterized in that the breaker acquisition Controlling in equipment further includes Temperature Humidity Sensor, for measuring real time temperature and humidity number inside breaker acquisition control equipment According to, and send data to intelligent control device.
8. a kind of Intellectualized Switchgear of high-voltage switch gear according to claim 1, which is characterized in that the disconnecting link acquisition control It further include Temperature Humidity Sensor in control equipment, for measuring real time temperature and humidity data inside disconnecting link acquisition control equipment, and Send data to intelligent control device.
9. a kind of Intellectualized Switchgear of high-voltage switch gear according to claim 1, which is characterized in that the breaker operator The operation that adaptive polarizing memory voltage time constant executes includes: protection breaker tripping and closing, manual divide-shut brake, circuit breaker position monitoring, closing circuit monitoring, jumps The monitoring of lock circuit, closing a floodgate keeps function and relay tip monitoring, tripping that function and relay tip monitoring, hand is kept to close signal Monitoring and operation power monitoring and anti-bouncing function.
CN201810687694.9A 2018-06-28 2018-06-28 A kind of Intellectualized Switchgear of high-voltage switch gear Pending CN108963956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810687694.9A CN108963956A (en) 2018-06-28 2018-06-28 A kind of Intellectualized Switchgear of high-voltage switch gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810687694.9A CN108963956A (en) 2018-06-28 2018-06-28 A kind of Intellectualized Switchgear of high-voltage switch gear

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110212641A (en) * 2019-05-17 2019-09-06 浙江华云电力工程设计咨询有限公司 A kind of GIS switch combination electrical body terminal, site integrate terminal
CN111478188A (en) * 2020-04-01 2020-07-31 南京合智电力科技有限公司 Intelligent high-voltage switch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202121209U (en) * 2011-05-27 2012-01-18 平高集团有限公司 Intelligent high voltage switch device
CN202565035U (en) * 2012-06-04 2012-11-28 浙江开关厂有限公司 Gis microcomputer control system
CN102891533A (en) * 2012-09-19 2013-01-23 河南平高电气股份有限公司 800kV intelligent circuit breaker
CN106059086A (en) * 2016-07-11 2016-10-26 西安工程大学 Box type transformer station current-carrying fault prediction system and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202121209U (en) * 2011-05-27 2012-01-18 平高集团有限公司 Intelligent high voltage switch device
CN202565035U (en) * 2012-06-04 2012-11-28 浙江开关厂有限公司 Gis microcomputer control system
CN102891533A (en) * 2012-09-19 2013-01-23 河南平高电气股份有限公司 800kV intelligent circuit breaker
CN106059086A (en) * 2016-07-11 2016-10-26 西安工程大学 Box type transformer station current-carrying fault prediction system and application thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
钟建英: "智能高压开关设备技术研究进展", 《高压电器》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110212641A (en) * 2019-05-17 2019-09-06 浙江华云电力工程设计咨询有限公司 A kind of GIS switch combination electrical body terminal, site integrate terminal
CN111478188A (en) * 2020-04-01 2020-07-31 南京合智电力科技有限公司 Intelligent high-voltage switch

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Application publication date: 20181207

RJ01 Rejection of invention patent application after publication