Reactive power and voltage control method in wind power gathering area considering wind power uncertainty

Abstract

The invention discloses a method for controlling reactive power and voltage in a wind power gathering area considering the uncertainty of wind power. The main control station obtains the real-time power flow data of the wind power gathering area, and receives the voltage optimization control command issued by the dispatching main station; the wind power cluster control main station takes the gathering station of the wind farm group as the voltage pivot point, and establishes and solves the problem that accounts for the fluctuation of wind power. Deterministic wind farm cluster reactive power and voltage coordination control optimization model; the present invention ensures that the central node still meets the dispatching requirements under the condition of random fluctuation of wind power by coordinating the control of the bus voltage of each wind farm grid-connected point and the reactive power output of the reactive power equipment of the collecting station The voltage of the main station is optimized to control the command range, and the dynamic reactive power reserve of the wind power gathering area is maximized, which improves the voltage stability of the system.

Description

technical field [0001] The invention relates to a reactive power and voltage control method in a wind power gathering area taking into account the uncertainty of wind power, and belongs to the technical field of automatic voltage control of power systems. Background technique [0002] At present, due to the randomness, intermittency and uncertainty of wind energy, there must be randomness, intermittency and uncertainty along with its power generation. After large-scale wind power is connected to the power grid, it will bring new problems of reactive power and voltage. , mainly in two aspects: on the one hand, it is difficult for wind turbines to maintain a constant active power output during the control period like conventional wind turbines. In the case of large fluctuations in wind speed, the reactive power and voltage regulation strategy for single-section operation information cannot guarantee the entire Control effect within the cycle. [0003] On the other hand, wind ...

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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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