Optimization dispersion compensation method for arc suppression coil of power distribution network

Abstract

The invention discloses an optimization dispersion compensation method for an arc suppression coil of a power distribution network. The optimization dispersion compensation method comprises the stepsof 1, reading the original network parameters, comprising voltage level, feeder line length and capacitance and inductance per unit length, of the power distribution network; 2, obtaining dispersion compensation amount of each circuit by satisfying a particle swarm algorithm in each constraint condition; 3, obtaining fault rate of each circuit based on the dispersion compensation amount of each circuit, circuit compensation point parameters, a circuit weight coefficient and a fault rate influence coefficient; 4, obtaining equipment investment cost and fault loss cost according to the dispersion compensation amount and the fault rate of each circuit, and performing summing on the equipment investment cost and fault loss cost to obtain the optimization dispersion compensation investment total cost for the arc suppression coil of the power distribution network; and 5, repeatedly executing the steps of 2-4 until an iteration condition is satisfied to obtain the lowest optimization dispersion compensation investment total cost for the arc suppression coil of the power distribution network, and a corresponding compensation scheme. By virtue of small-current system upgrading, the dispersion compensation for the arc suppression coil is performed, so that system safety and reliability can be ensured while the optimization dispersion compensation investment total cost for the arc suppression coil of the power distribution network can be in the minimum.

Description

technical field [0001] The invention relates to the field of transformation of small current grounding systems, in particular to an optimized decentralized compensation method for arc suppressing coils of distribution networks. Background technique [0002] At present, the 10kV medium-voltage power distribution system restricts the capacitive current to the ground mainly through the neutral point of the grounding transformer used in the substation to install an arc suppression coil, and concentrates on the system to compensate the capacitive current to the ground. In recent years, due to the extensive use of cables and insulated wires in the medium-voltage power supply system, the ground capacitance current of the system has increased too fast, and the reserved compensation capacity of the arc suppression coil cannot meet the increase in the ground capacitance current. It seems that the capacity is insufficient and needs to be replaced. The traditional capacity-increasing t...

AI Technical Summary

Problems solved by technology

However, the current application status does not take into account the detailed compensation position and compensation point, and is more application-oriented, that is, it may only give priority to the line compensation with a high failure rate, or it may only compensate at the same position on different lines. This article will Comprehensive consideration of various factors to compromise, the introduction of optimization algorithms and correlation coefficients for in-depth consideration, so as to obtain a relatively better decentralized compensation scheme

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