Multi-fault power supply recovery method for power distribution network
A power supply recovery, multi-fault technology, applied in the power network operating system integration, electrical components, circuit devices, etc., can solve problems such as no longer applicable, and achieve the effect of shortening recovery time and improving power supply quality
Inactive Publication Date: 2021-01-01
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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Problems solved by technology
The above complex problems make the power recovery strategy used by power companies in the event of small-scale line or equipment failures no longer applicable
Method used
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Embodiment Construction
[0014] In order to better understand the technical solution of the present invention, the following will be described in detail through specific examples:
[0015] A method for restoring power supply with multiple faults in a distribution network of the present invention comprises the following steps:
[0016] Step 1. After the fault occurs, locate the exact location of the fault, and trip the circuit breaker on the power side closest to the fault location to effectively isolate the fault area;
[0017] Step 2. Make the faulty feeder DG jump off its respective grid-connected circuit breaker, and the DG with black start capability will switch to the island operation mode to supply power to the local load. If the capacity is insufficient, the load will be reduced, and the non-faulty feeder DG will continue to maintain the grid-connected operation state;
[0018] Step 3: After the fault is isolated, search for the number of interruptible loads, breaking switches and primary conta...
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The invention discloses a multi-fault power supply recovery method for a power distribution network, and the method comprises the following steps: 1, positioning an accurate fault position, and isolating a fault region; 2, tripping off respective grid-connected circuit breakers by the fault feeder DG, and converting the DG with the black-start capability into an island operation mode to supply power to a local load; 3, after fault isolation, searching the number of interruptible loads, breaking switches and primary interconnection switches in the power loss area, judging whether the sum of thetransfer capacity and the black start DG capacity of the primary interconnection switches meets the load requirement of the power loss area or not, and if yes, implementing a power supply complete recovery scheme; 4, if the power supply complete recovery requirement is not met, searching a power supply recovery feasible solution set according to the power supply recovery model; and 5, comparing the feasible solutions, and analyzing the objective functions to obtain a comprehensive optimal solution, namely, an optimal scheme for system fault recovery. According to the invention, rapid power supply recovery after multiple faults of the power distribution network can be realized.
Description
technical field [0001] The invention relates to a method for restoring power supply with multiple faults in a distribution network used in the field of smart grids. Background technique [0002] When a large-scale power outage occurs when the distribution network suffers from a huge man-made or natural disaster, it is necessary to restore the power supply of the distribution network in time. Due to the large number of fault points, it is not possible to restore power supply to all lost load points through switching operations at this time. It is necessary to decide which fault points should be restored first, and then restore the remaining fault points after emergency repairs. There are many, but the emergency repair resources are limited, and it is also necessary to decide which fault points should be repaired first. After the repair of the fault point with priority repair is completed, other fault points will be repaired. The above-mentioned complex problems make the powe...
Claims
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IPC IPC(8): H02J3/38H02H7/26H02J3/14H02J3/46
CPCH02H7/26H02J3/144H02J3/388H02J3/466H02J2203/20H02J2300/40Y02B70/3225Y04S20/222
Inventor 陆昱乐弘习朱洪成滕莹冰龚越明谢婧
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO