Method for determining inactive compensation capacity network adaptability of wind power plant

Abstract

The invention discloses a method for determining the inactive compensation capacity network adaptability of a wind power plant and relates to power grid optimization analysis. Aiming at the situation that the conventional inactive capacity configuration of the wind power plant is not reasonable, the invention provides a new inactive capacity calculating method which comprises the following steps of: firstly, establishing a power grid simulation mode which is composed of a wind power plant, a box transformer substation, a current collection line, a boost transformer substation, an outgoing line and an accessing power grid system; secondly, determining an inactive configuration capacity change range by adopting the conventional theoretical calculating method; carrying out a closed loop test on a compensation capacity range value determined by using the conventional theoretical calculating method through using a simulation system so as to determine the sensitivity (of the wind power plant) to be compensated and the capacitive inactive compensation capacity (of the wind power plant) to be compensated; and introducing the sensitivity and the capacitive inactive compensation capacity into a simulation power grid model, and verifying a steady trend, a dynamic voltage fluctuation and a transient stability so as to obtain adaptive network inactive compensation configuration capacity and corresponding equipment technical requirements, thus ensuring that the inactive compensation capacity of the wind power plant can be effectively used for the inactive configuration of the wind power plant.

Description

technical field [0001] The invention relates to the field of network optimization analysis, in particular to reactive power compensation and optimal configuration therein. Background technique [0002] The requirements of the international situation of environmental protection and low carbon have promoted the rapid growth of wind power installed capacity, and the proportion of the total installed capacity of the power grid has continued to increase. It is unreasonable, and will have a certain negative impact on the safe and stable operation of the power grid, resulting in fluctuations in the voltage of the wind farm and overall instability. In view of the fact that the capacitive reactive power capacity of wind farms is generally calculated according to the empirical formula and configured according to the following principles, that is, the variable-speed constant-frequency double-fed wind turbine is configured according to 25% of the main variable capacity, and the constant...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the reactive capacity calculated by the empirical formula is not reasonable enough, and provide a new calculation method for establishing the reactive power allocation capacity of the wind farm, which can realize different scales of wind farms with different installed capacities and sending lines Under , the configured reactive capacity can meet the grid operation requirements

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