Multi-power-supply reactive power matching method and system for optimizing voltage control capability of wind power plant

Abstract

The invention discloses a multi-power-supply reactive power cooperation method and system for optimizing the voltage control capability of a wind power plant, and the method comprises the steps: determining the topological structure of the wind power plant, and carrying out the classification according to the node type of each node in the topological structure, so as to obtain a plurality of nodesets; for nodes in each node set, respectively determining equality constraint conditions based on reactive power of an alternating current line; determining equality constraint conditions based on active power and voltage of a wind power plant grid-connected point; determining upper and lower limit constraint conditions of each node voltage in the wind power plant and upper and lower limit constraint conditions of reactive power of each power generation unit according to operation requirements of a wind turbine generator and a reactive power compensation device SVG; and determining an objective function of multi-power-supply optimal reactive power output in the wind power plant, and determining reactive power output of each wind turbine generator set and the SVG. According to the invention, the active loss of the SVG and the active network loss of the power transmission line in the wind power plant can be reduced, the reactive voltage coordination control capability of the new energyplant station is improved, and the overall economic benefit of the wind power plant is improved.

Description

technical field [0001] The present invention relates to the field of metering and calibration, and more specifically, relates to a multi-power source reactive power coordination method and system for optimizing the voltage control capability of wind farms. Background technique [0002] As the currently mature and most promising renewable energy, wind power has maintained a strong momentum of development in recent years. As of the end of 2018, my country's installed wind power capacity reached 184 million kilowatts, accounting for more than 9.7% of the country's installed power generation capacity. Among them, the new energy of 16 provincial power grids including Xinjiang, Qinghai, Ningxia, and northern Hebei has become the second largest installed power source, and the installed capacity of new energy in four provinces including Xinjiang and Qinghai accounted for more than 30% of the total installed capacity of local power. It is foreseeable that in the near future, some lo...

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Problems solved by technology

[0004] The present invention proposes a multi-power supply reactive power coordination method and system that optimizes the voltage control capability of wind farms to solve the problem of how to adjust the reactive power output of wind turbines and SVGs

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