Power grid line fault isolation device and method
A line fault and isolation device technology, applied in emergency protection circuit devices, electrical components and other directions to ensure stable operation
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Embodiment 1
[0035] A power grid line fault isolation device, including: a distribution network and users at the end of the distribution network, and also includes: a processor 1, a section switch 2, a circuit breaker 3, a wireless communication module 4, a ground fault judging device 5 and a substation server 6;
[0036] Wherein, the section switch 2 is arranged on the trunk road of the distribution network; the circuit breaker 3 is installed on the branch road of the distribution network; the circuit breaker 3 is connected with the ground fault judging device 5; the processor 1 is respectively connected with the wireless communication module 4, the ground fault The judging device 5 and the section switch 2 are electrically connected; the processor 1 and the substation server 6 perform information exchange through the wireless communication module 4 .
[0037] In order to further optimize the above technical scheme, the ground fault judging device 5 includes: a zero-sequence voltage trans...
Embodiment 2
[0044] A power grid line fault isolation method, the specific steps include:
[0045] Step 1: Number the section switch 2 as K1, K2, ..., Kn; number the user branch circuit breaker 3 as K 用户11 , K 用户12 ,...,K 用户21 , K 用户22 ,...,K 用户nn ;
[0046] Step 2: The ground fault judging device 5 transmits the collected voltage and current signals on the branch lines to the processor 1;
[0047] Step 3: The processor 1 compares the voltage and current signals with the preset threshold; if abnormal, the processor 1 controls the circuit breaker 3 to disconnect;
[0048] Step 4: If the substation server 6 cannot receive the signal of the wireless communication module 4 of the continuous user, then the main road fails; the substation server 6 and the corresponding processor 1 send instructions to control the section switch 2 to disconnect;
[0049] Step 5: Realize the fault isolation of the trunk road.
[0050] In order to further optimize the above technical solution, in step 2, the...
Embodiment 3
[0052] Such as image 3 As shown, each wireless communication module of the branch after the sub-section switch K1 cannot interact with the server wireless communication module, indicating that the main road is faulty, and the possibility of a fault in the K1-K2 section is high, and the maintenance personnel will carry out emergency repairs for this section. When the fault prediction device is used for recovery, when a fault occurs, the dispatcher controls the fault prediction device through the substation server. After receiving the pre-judgment instruction, the high-voltage generator uses the shaker test principle to perform high-voltage charging prediction on the faulty line , if it is predicted that power can be transmitted, then close the power transmission switch to transmit power.
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