Reactive voltage optimal control method for wind power plant cluster

Abstract

An optimization control method for a reactive voltage of a wind farm cluster comprises the following steps: determining whether it is required to perform optimization control on a reactive voltage of a wind farm cluster; obtaining adjusting ranges of reactive source devices of wind farms and pooling stations in a cluster area; and establishing and solving a reactive voltage optimization control mathematic model of the wind farm cluster. In the optimization control method for a reactive voltage of a wind farm cluster, a wind farm cluster access point is used as a central voltage control node, and the wind farm integration point bus voltage, the wind farm step-up substation tap, the reactive power output of a reactive compensation device of the pooling station, and the pooling station transformer tap in the cluster area are adjusted; in this way, the central node is ensured to satisfy the control instruction range of a scheduling mechanism, and the stability margin of the static voltage in the cluster area maintains at the maximum and the active power loss maintains at the minimum, thereby improving the security stability during system operation and enhancing the capability of utilization of the wind power.

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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