Paralleling reactor operation overvoltage managing circuit and managing method of paralleling reactor operation overvoltage managing circuit
A technology for operating overvoltage and reactors, which is applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problems that are not enough to effectively control the operating overvoltage of shunt reactors, and achieve the effect of eliminating threats and ensuring normal operation
Active Publication Date: 2015-03-11
STATE GRID CORP OF CHINA +2
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Problems solved by technology
Conventional treatment methods such as installing RC absorbers and overvoltage protectors on the side of the reactor are not enough to effectively control the operating overvoltage of the vacuum circuit breaker breaking the 35kV shunt reactor
Method used
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Embodiment 1
[0017] Such as figure 1 As shown, a shunt reactor operation overvoltage control circuit provided in this embodiment includes an empty bus 1 on which a first switch 2 is installed; the first switch 2 is connected to the shunt reactor through a cable 3 4 connected, the shunt reactor 4 is connected to the line at one end of the second switch 5, and the other end of the second switch 5 is three-phase short-circuited as a neutral point; between the shunt reactor 4 and the second switch 5 It is connected to one end of the arrester 6, and the other end of the arrester 6 is grounded.
[0018] The treatment method for the overvoltage control circuit operated by a shunt reactor includes the following steps: firstly, the first switch 2 is switched on to transmit power; when normal switching is required, the second switch 5 switches the shunt reactor Switching at the neutral point side; when the first opening phase only occurs once or several times of re-ignition, it will turn to pow...
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The invention discloses a paralleling reactor operation overvoltage managing circuit and a managing method of the paralleling reactor operation overvoltage managing circuit. The paralleling reactor operation overvoltage managing circuit comprises a bus which is provided with a first switch. The first switch is connected with a paralleling reactor through a cable. The paralleling reactor is connected with one end of a second switch in a circuited mode. The other end of the second switch undergoes three-phase short circuit and is a neutral point. The paralleling reactor is connected with one end of an arrester between the paralleling reactor and the second switch. The other end of the arrester is connected to the ground. According to the paralleling reactor operation overvoltage managing circuit and the managing method of the paralleling reactor operation overvoltage managing circuit, the first switch is arranged to protect switch-off and the second switch is used for carrying out normal switching. The aim of managing operation overvoltage is achieved by hindering continuous development of restriking of a first open phase. The paralleling reactor operation overvoltage managing circuit and the managing method of the paralleling reactor operation overvoltage managing circuit are especially effective in managing switching of an empty bus and threats posed by the paralleling reactor operation overvoltage to the bus.
Description
technical field [0001] The invention relates to a shunt reactor operation overvoltage control loop and a control method thereof, and belongs to the technical field of power transmission, transformation and distribution of power systems. Background technique [0002] In order to adjust voltage and reactive power, my country's power grid generally configures shunt reactors on the 35kV side of 220kV substations, uses vacuum circuit breakers for switching, and connects shunt reactors and vacuum circuit breakers through cables. [0003] When the vacuum circuit breaker breaks the shunt reactor of the 35kV neutral point ungrounded system, due to the free oscillation of the load side, the recovery voltage of the first open phase fracture rises much faster than the dielectric strength growth rate of the interrupter fracture during normal breaking. In the partial arcing time range, the first open phase will have re-ignition breakdown. [0004] After the re-ignition occurs in the ...
Claims
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IPC IPC(8): H02J3/00H02J3/18
CPCY02E40/30
Inventor 金百荣李电胡雪平陈晓宇蔡重凯李云飞洪金琪秋勇吕丹
Owner STATE GRID CORP OF CHINA