Calculation Method for Capacitor Parallel Compensation in Distribution Network Based on Local Tree

Abstract

A calculation method for parallel compensation of distribution network capacitors based on partial trees, which obtains distribution network information, initially calculates the initial compensation scheme for parallel capacitors, judges whether the partial trees need to be divided again, divides the corresponding partial trees, and determines each partial tree separately Compensation point, judge whether the local tree needs to be optimized again, further optimize the compensation point, compare the benefit-to-investment ratio and make a cyclical judgment until the output of each compensation node number and their compensation capacity under the condition of the maximum benefit-to-investment ratio. The invention can provide capacitor parallel compensation location and compensation capacity of radial distribution network, more effectively reduce the line loss rate in the operation process of the distribution network, improve the voltage distribution of the distribution network operation, and achieve the purpose of improving the economic benefits and power supply of the distribution network operation. The role of reliability has high practical value.

Description

technical field [0001] The invention relates to a distribution network compensation calculation method, in particular to a distribution network medium-voltage capacitor parallel compensation calculation method based on a partial 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 reactive power value of the power supply line; Reactive power is transmitted through the remote generator, 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 transmission of reactive power will reduce the transmission of line active power. Increase investment in power grid transformation. On-site compensa...

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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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