Wind power collection area reactive voltage control method considering wind power uncertainty.

Abstract

The invention discloses a wind power collection area reactive voltage control method considering wind power uncertainty. The method comprises the following steps that a wind power cluster control master station acquires a regulation range and wind power prediction data of wind power plant reactive power equipment in a wind power cluster; the wind power cluster control master station acquires real-time power flow data of the wind power collection area, and receives a voltage optimization control instruction issued by a dispatching master station; and the wind power cluster control master station, by taking the collection station of the wind power plant cluster as a voltage central point, establishes and solves a wind power plant cluster reactive voltage coordination control optimization model considering wind power uncertainty. It is ensured that the central node still meets the voltage optimization control instruction range of the dispatching master station under a condition that the wind power is randomly fluctuating, by means of coordination and control of the grid-connected point bus voltage of each wind power plant and the reactive power output of the reactive power equipment of the collection station; and meanwhile, the dynamic reactive reserve of the wind power collection area is in the maximum, so that the voltage stability of the system is improved.

Description

technical field [0001] The invention relates to a method for controlling reactive power and voltage in a wind power collection area in consideration of wind power uncertainty, and belongs to the technical field of automatic voltage control of electric power systems. Background technique [0002] At present, due to the characteristics of randomness, intermittency and uncertainty of wind energy, there must be randomness, intermittence and uncertainty along with its power generation. After large-scale wind power is connected to the grid, it will bring new reactive power and voltage problems. , mainly manifested in two aspects: on the one hand, it is difficult for wind turbines to maintain a constant active output within the control cycle like conventional wind turbines. control over the period. [0003] On the other hand, wind turbines are equipped with high-voltage protection and low-voltage protection. When wind power is booming, the slow reactive power adjustment equipment ...

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Problems solved by technology

[0004] In wind farm reactive power and voltage control, wind power prediction information has been introduced to implement wind farm reactive power and voltage control strategies, but wind power prediction information is a predicted value, and its own specific uncertainty, directly using the wind power prediction information and the actual wind farm There are deviations in the operating conditions, so the uncertainty of wind power prediction information needs to be considered in the reactive power and voltage coordinated control of wind farm clusters, so as to improve the ability of wind power collection areas to deal with abnormal disturbances such as faults, and improve the voltage safety margin of the system. Safe and stable operation provides strong support

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