Control circuit preventing error closing of high voltage side switch during maintenance and transformer substation system
A control circuit and high-voltage side technology, which is applied to the panel/switch station circuit device, substation/switch layout details, electrical components, etc., can solve the problem of low safety factor of the control circuit, so as to avoid personal safety hazards, save costs, and operate safe effect
Inactive Publication Date: 2018-10-09
HENAN SENYUAN ELECTRIC CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to provide a control circuit that prevents the high-voltage side switch from being mistakenly closed during maintenance, so as to solve the problem of low safety factor of the existing control circuit
The invention also provides a substation system, which is used to solve the problem of low safety factor of the control circuit in the existing substation system
Method used
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[0013] Substation system embodiment
[0014] This embodiment provides a substation system, the substation system includes a primary main circuit and a control circuit for preventing a high-voltage side switch from being mistakenly closed during maintenance. The primary main circuit belongs to conventional technology, such as figure 1 As shown, it will not be described in detail here.
[0015] Such as figure 2 shown, 1QF with figure 1 The same, representing the high-voltage side switch, 1ZK is the protection switch of the high-voltage side switch 1QF operating power supply. figure 2 In the box corresponding to the high-voltage side switch 1QF, terminals 1 and 2 are the working power supply of the electric operating mechanism of the high-voltage side switch, terminal 3 is the entrance of the internal closing control coil HQ, and terminal 4 is the entrance of the internal opening control coil TQ. HA is the closing button, and TA is the opening button. BLX is the limit swit...
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The invention relates to a control circuit preventing error closing of high voltage side switch during maintenance and a transformer substation system. The control circuit includes a stroke switch, ahigh voltage side switch opening control circuit and a high voltage side switch closing control circuit arranged at the door of a transformer room. A normally closed auxiliary contact of the stroke switch and an opening control coil are arranged in the high voltage side switch opening control circuit in series. A normally opened auxiliary contact of the stroke switch, a closing control coil and aclosing button are arranged in the high voltage side switch closing control circuit in series. When the door of the transformer room is opened, the normally closed auxiliary contact is closed, the closing control coil is electrified and the high voltage side switch opens. At the same time, the normally opened auxiliary contact opens, and the closing control coil loses power supply. The closing control coil cannot get electrified even by closing operation of the closing button. Therefore, even when a condition that a worker operates the closing button by mistake during maintenance occurs, closing of the high voltage side switch is avoided. Further, personal injury to the worker is avoided and circuit safety coefficient is improved.
Description
technical field [0001] The invention relates to a control circuit and a substation system for preventing a high-voltage side switch from being mistakenly closed during maintenance. Background technique [0002] A conventional box-type substation consists of a high-voltage side switch, a transformer, and a low-voltage side switch. In the transformer room, there are not only high-voltage cables connected to the high-voltage switch, but also low-voltage copper bars connected to the low-voltage switch, such as figure 1 As shown, it is a common primary circuit scheme of a box-type substation, 1QF represents a 10kV high-voltage side switch, 2QF represents a 0.4kV low-voltage side switch, and BK is a 10 / 0.4kV transformer. Under normal circumstances, the 10kV side cable is led from the upper-level power distribution room for the box transformer. The 10kV power supply passes through the high-voltage side switch 1QF to the BK transformer, and the transformer changes the 10kV power sup...
Claims
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IPC IPC(8): H02B1/24H02B1/32
CPCH02B1/24H02B1/32
Inventor 王静宁朱爱先张佳慧
Owner HENAN SENYUAN ELECTRIC CO LTD