Direct-current parallel type wind farm active power coordinated control method

Abstract

The invention relates to a direct-current parallel type wind farm active power coordinated control method. A wind farm includes direct-current wind turbine generator sets provided with energy storage systems. The method includes the following steps that: an active power dispatch instruction of a power grid is determined, and the running states of the wind turbine generator sets in the direct-current wind farm are acquired, and the usable maximum active power of the wind turbine generator sets is determined; the running states of the energy storage systems are determined, and the running state of the direct-current wind farm is determined; whether the energy storage systems satisfy the requirements of the active power dispatch instruction of the power grid is analyzed, and therefore, the active power control instructions of the direct-current wind turbine generator sets can be determined. With the direct-current parallel type wind farm active power coordinated control method adopted, power generated by the wind turbine generator sets can change with specified power instructions accursedly, and power generated by the wind farm can satisfy the requirements of the dispatch of the power grid. According to the direct-current parallel type wind farm active power coordinated control method provided by the technical scheme of the invention, the requirements of the power grid, the running states of the wind turbine generator sets and the working states of the energy storage systems are comprehensively considered; power instructions are transmitted to the direct-current wind turbine generator sets; the output power of the generators and the energy storage systems are adjusted, so that the active power outputted by the wind farm can satisfy the requirements of the power grid in a certain range.

Description

technical field [0001] The invention relates to the technical field of direct current transmission, and more particularly relates to a method for coordinated control of active power of a direct current parallel wind farm. Background technique [0002] China's wind power installed capacity is growing rapidly. Under the guidance of the development strategy of "building large bases and integrating into large power grids", wind farms are showing a trend of large-scale development. The installed capacity of a single wind farm has increased from tens of thousands of kilowatts to hundreds of thousands, or even above million kilowatts. At present, the wind power bases built or under construction in Northwest China, North China, Northeast China and other regions generally use AC power collection and AC power transmission to complete the power transmission and consumption of wind power bases. These methods all have problems such as low voltage stability, large supporting reactive pow...

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Problems solved by technology

[0004] Based on the above analysis of the research status at home and abroad, it can be seen that the current research on power coordination control of wind farms is mainly concentrated on AC wind farms, and there are few studies on DC wind farms.

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