Reactive voltage optimal control method for wind power plant cluster

Abstract

The invention provides a reactive voltage optimal control method for a wind power plant cluster. The reactive voltage optimal control method comprises the steps that whether the reactive voltage optimal control for the wind power plant cluster needs to be carried out or not is judged; the reactive source equipment adjustment range of wind power plants and a pooling station in the wind power plant cluster region is obtained; and a reactive voltage optimal control mathematic model for the wind power plant cluster is built and solved. According to the reactive voltage optimal control method, a wind power plant cluster access point is used as a central voltage control node, the wind power plant grid-tied point bus voltage of the cluster region and a transformer tap of a booster station of the wind power plant are regulated, reactive compensation equipment of the pooling station is regulated to have reactive power, and a transformer tap of the pooling station is also regulated, the pilot node is enabled to meet the control instruction range of a dispatching mechanism, meanwhile the quiescent voltage stability margin of the cluster region is enabled to be maximum, and the active power transmission loss is enabled to be minimum; the quiescent voltage stability margin in the wind power plant cluster region can be effectively improved, the grid active loss in the cluster region also can be reduced, the operating safety and stability of a system are improved, and the capacity of digesting and saving wind power of the system is also improved.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation and access, and in particular relates to a reactive power voltage optimization control method of a wind farm cluster. Background technique [0002] The reverse distribution of my country's wind energy resources and power load centers, and the imbalance between the development speed of wind power and the speed of grid construction have resulted in the current situation of "centralized development, long-distance transmission, and weak grid access" of wind power generation. Most of the wind farms in the wind farm cluster area are radially connected, and the collection lines are relatively long. At the same time, there is little or no load access in the wind farm cluster area, which is a typical long-distance weakly connected sending-end system. Due to the randomness and volatility of wind power generation, the integration of large-scale wind farm clusters will seriously affect th...

AI Technical Summary

Problems solved by technology

Due to the randomness and volatility of wind power generation, the integration of large-scale wind farm clusters will seriously affect the safe and stable operation of the power grid.

When the output of wind power is high and the voltage stability in the cluster access area is reduced, and the safety of the image grid is generally taken, measures to limit the output of wind power are generally taken, which is a waste of clean energy utilization and wind farm investment

Moreover, the reactive power and voltage local control method adopted by a single wind farm or collection station cannot achieve optimal control from a global perspective

[0003] In fact, for the weakly connected sending-end system of wind farm clusters, voltage stability is one of the bottlenecks for the large-scale development and utilization of wind power

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