Analysis method of carrying out paralleling reactor optimization configuration on offshore wind power plant outgoing line terminal submarine cable

Abstract

The invention discloses an analysis method of carrying out paralleling reactor optimization configuration on an offshore wind power plant outgoing line terminal submarine cable. In the method, optimization configuration theory calculation of paralleling reactors is performed on an offshore-wind-power-plant no-load submarine-cable long line and two ports of an offshore booster station system component are networked so as to acquire a transition function of a no-load long line tail terminal voltage to a power-supply electromotive force. Mathematical analysis is performed on the transition function, different paralleling reactor configuration schemes are compared so that an effect of carrying out charging power reactive compensation on the no-load submarine cable long line tail terminal paralleling reactors is the best, an effect of carrying out reactive compensation on the paralleling reactor of two ends of the submarine cable simultaneously comes second and an effect of carrying out reactive compensation on a head terminal of the submarine cable is worst. Finally, analogue simulation verification is performed; electromagnetic transient analysis software PSCAD is used to establish a model and the no-load submarine cable under different paralleling reactor configuration schemes is operated in a simulation mode; compensation effects are compared and theory calculation correctness is verified.

Description

technical field [0001] The invention relates to the technical field of overvoltage in the field of offshore wind farms, and in particular to an analysis method for optimizing the configuration of shunt reactors for submarine cables at outlet ends of offshore wind farms based on the no-load long-line capacitance effect. Background technique [0002] With the rapid development of the utilization of offshore resources and the requirements for the use of clean energy, the development and construction of offshore wind farms in my country is developing day by day. By 2020, the installed capacity of offshore wind farms in my country is expected to reach 10GW. In the construction of wind farms, due to the differences in sea and land geographical conditions, high-strength submarine cables must be used in the process of connecting offshore wind farms to land power grids, including 35kV or 10kV cables connecting offshore windmill fans to offshore booster stations Submarine cables and 1...

AI Technical Summary

Problems solved by technology

[0006] 1. The conclusions obtained through experiments or simulation results may only be applicable to this special case, but do not have wide applicability due to the lack of detailed analysis;

[0007] 2. In offshore wind farms, in order to carry out reactive power compensation for long lines of unloaded submarine cables, the options available should include: ① reactive power compensation at the end of the line; ② compensation at the head end of the line; However, in the literature that has appeared, there has not been a theoretical and systematic analysis method and mutual comparison for the above three shunt reactor configuration schemes at the same time.

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