Partial tree based power distribution network capacitor parallel compensation computing method

Abstract

A partial tree based power distribution network capacitor parallel compensation computing method is disclosed. The computing method comprises the steps of obtaining information of a power distribution network; initially calculating an initial compensation scheme of parallel compensators; judging whether the partial trees need to be re-divided; dividing the corresponding partial tree; separately determining the compensation points for each partial tree; judging whether the partial trees need to be re-optimized; further optimizing the compensation points; comparing benefit investment ratio and performing circular judgment until the numbers of each compensation node and the compensation capacities of each compensation node under the maximum benefit investment ratio are output. According to the partial tree based power distribution network capacitor parallel compensation computing method, the capacitor parallel compensation sites and compensation capacities of the radiation type power distribution networks can be provided; and the line loss rate in the running process of the power distribution networks can be more effectively reduced to improve the voltage distribution in the running of the power distribution networks and to improve the economical benefit and the power supply reliability in the running of the power distribution networks, so that computing method is high in practical value.

Description

Technical field [0001] The invention relates to a compensation calculation method for a distribution network, in particular, to a calculation method for parallel compensation of medium voltage capacitors in a distribution network based on a local tree. Background technique [0002] The distribution network not only provides relevant power to the load, but also provides reactive power. On the one hand, the amount of reactive power directly affects the voltage quality of the distribution network, and the voltage loss is directly related to the value of the reactive power of the power supply line; on the other hand, the scale of the existing distribution network is large, and all the loads on the distribution network are Reactive power is transmitted through remote generators, which will inevitably increase the branch current, thereby increasing the theoretical line loss and reducing economic benefits; finally, under the condition of a certain line transmission capacity, the transmi...

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Problems solved by technology

[0010] However, the problem of this technology is: because the particle swarm optimization algorithm is not good at dealing with the discretization problem, and the reactive power compensation of the distribution network is to determine the compensation point and the number of compensation groups, which is a double-layer discretization optimization problem, and it is easy to fall into the Local optimal solution, especially when the scale of the distribution network is large, it is difficult to achieve the optimal compensation effect

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