An intelligent power supply restoration method for distribution network self-healing
A technology of intelligent power supply and recovery method, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of a large number of operation switches, time-consuming, inability to meet fast power supply recovery, etc., to shorten the operation time and achieve fast power supply Restoration effect
Active Publication Date: 2021-04-06
DONGFANG ELECTRONICS +1
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Problems solved by technology
The power supply recovery scheme in the prior art has the problems of a large number of operating switches and a long time consumption, which cannot meet the requirements of fast power supply recovery
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[0043] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:
[0044] Power supply restoration refers to the process that after the distribution network fails, the system has correctly completed fault location and fault isolation, and the healthy part of the distribution network returns to normal power supply. In the distribution automation system, the state after the feeder fault isolation is completed: the outlet circuit breaker of the feeder where the fault is located and the load switches at both ends of the fault point are in the breaking state. After the fault isolation is completed, in order to realize the fast recovery of power supply for the fault upstream and fault downstream loads, necessary measures should be taken.
[0045] It is relatively simple to restore power supply to the load upstream of the fault. Directly reclosing the outlet circuit breaker of the feeder where the fault is located can immedia...
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The invention discloses an intelligent power supply recovery method for self-healing of distribution network. First, determine the normally open contact switch that can be remotely controlled and its corresponding power supply capacity in the supply area, and calculate the capacity factor for the fault downstream load to restore power supply; secondly, use the capacity factor and the calculation results of the power flow of the distribution network to observe whether there is a node in the system Problems such as overvoltage and line flow overload; then, aiming at problems such as voltage and power flow exceeding the limit, the method of solving the optimal set of objective functions is used to solve the combination of conventional tie switches and load switches for the restoration of normal regional power supply; finally , after obtaining the optimal feasible solution, directly operate the calculated switch combination to realize regional intelligent power supply recovery. After the normally open contact switches at different positions are closed, the present invention realizes fast power supply recovery to the load in the shortest time and within the shortest action range of the switch through calculation, comparison and analysis of power supply capacity, voltage and current over-limit, and the like.
Description
technical field [0001] The invention relates to a power supply recovery method for a distribution network. Background technique [0002] A reliable power supply is critical to improving the socio-economic development of our customers. Digitalization is one of the important factors that influence the power grid to move towards a clean energy future. One of the important strategies of distribution automation is to realize the automatic recovery of the distribution network. When the distribution network fails, the affected part of the system must be isolated, and the The sound part is restored. Fault location, isolation and power restoration are important technologies to realize self-healing of distribution network. When a part of the feeder fails, the self-healing reconstruction of the feeder helps to reduce the impact of the failure on customers, thereby improving the reliability of power supply. [0003] Automatic fault location and fault isolation are relatively easy to ...
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IPC IPC(8): H02J3/00
CPCH02J3/00Y04S10/52
Inventor 潘凯岩赵瑞锋刘海信卢建刚高天亮李波靳力郭文鑫
Owner DONGFANG ELECTRONICS