Substation line side lightning invasion wave overvoltage protection system
An intrusion wave overvoltage and protection system technology, applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. Insufficient, re-ignition damage, thermal collapse and other problems, to achieve the effect of improving protection margin, improving operating conditions, and reducing energy accumulation
Active Publication Date: 2021-07-27
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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[0005] The embodiment of the present invention provides a lightning intrusion wave overvoltage protection system on the line side of the substation, which can effectively solve the lightning intrusion along the outgoing line of the substation caused by continuous lightning strikes in the prior art The wave makes the insulation level of the switch fracture on the line side drop and the re-ignition is damaged, and the energy tolerance of the surge arrester with a series gap on the line side is insufficient and thermal collapse occurs
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[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0036] see figure 1 , is a schematic flowchart of a lightning intrusion wave overvoltage protection system on the line side of a substation provided by an embodiment of the present invention.
[0037] An embodiment of the present invention provides a lightning intrusion wave overvoltage protection system on the line side of a substation, including: a transformer, a bus arrester, a substation bus, a line side switch, a current transformer, and a line side lightning ...
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The invention discloses a substation line side lightning invasion wave overvoltage protection system. The systemcomprises a transformer substation bus, a line side switch, a current transformer and a line side lightning arrester with a series gap; one end of the line side switch is connected with the transformer substation bus, the other end of the line side switch is connected with the current transformer, and the other end of the line side switch is also connected with the lightning arrester with the series gap. According to the present invention, the problems in the prior art that the insulation level of the circuit side switch fracture is reduced and the circuit side switch fracture is reignited and damaged due to the lightning invasion waves along a transformer substation outgoing line caused by the continuous lightning stroke, and thermal collapse occurs due to the insufficient energy tolerance of the circuit side lightning arrester with the series gap can be effectively solved, and the lightning invasion wave overvoltage protection of the continuous lightning stroke at the line side of a transformer substation is realized.
Description
technical field [0001] The invention relates to the technical field of electric power protection, in particular to a lightning intrusion wave overvoltage protection system on the line side of a substation. Background technique [0002] Most of the ground lightning process is a continuous lightning strike consisting of the main discharge and subsequent return strikes. It is an atmospheric phenomenon that exists widely in nature. Lightning or multiple lightning strikes. [0003] For the equipment on the outlet side of the substation, under the severe operating conditions of continuous lightning strikes, the following situations are likely to occur: the switch action on the line side of the substation breaks the line due to lightning flashover and the current short circuit, which is equivalent to the arc extinguishing fracture of the switch in the hot standby state , at the back arc SF 6 In the recovery stage of the gas medium, if the outgoing line encounters continuous light...
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IPC IPC(8): H02H9/04H02H9/06
CPCH02H9/042H02H9/045H02H9/06
Inventor 李谦魏俊涛宋坤宇赵晓凤王增彬
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID