Grid-connected wind power plant point voltage control method based on MCR (Magnetic Control Reactor) and capacitance mixed compensation

Abstract

The invention relates to a grid-connected wind power plant point voltage control method based on MCR (Magnetic Control Reactor) and capacitance mixed compensation. The method comprises the steps of collecting real-time data of a grid-connected wind power plant region, and receiving a voltage instruction issued by a superior AVC (Automatic Voltage Control); judging whether the grid-connected wind power plant point voltage meets a requirement, if not, taking the smallest grid-connected point voltage deviation and the smallest input of reactive-load compensation equipment as targets, calling a multi-target evolutionary particle swarm optimization to solve the current input reactive compensation, obtaining the final switching amount of each equipment according to a capacitance and MCR mixed compensation strategy, and issuing the same to finally realize the effect that the grid-connected wind power plant point voltage quality is kept at a higher level. The needed switching amount of each equipment can be accurately solved by the multi-objective optimization model and a static and dynamic reactive-load compensation equipment mixed compensation strategy, and the aims of rapidly responding to the instruction issued by the superior, stabilizing the grid-connected wind power plant point voltage and improving electric energy quality are achieved.

Description

technical field [0001] The invention relates to a method for controlling the voltage of a grid-connected point of a wind farm, in particular to a method for controlling the voltage of a grid-connected point of a wind farm based on mixed compensation of MCR and capacitance. Background technique [0002] With the rapid development of the power industry, the scale of wind farms is increasing year by year, and the impact of wind farms on the power grid is also increasing. Due to factors such as wind speed fluctuations and grid failures, the voltage at the grid-connected point of the wind farm will drop, and at the same time, it will cause transient problems such as speed increase, overvoltage, and overcurrent, which seriously affect the safe operation of wind turbines. In this case, the wind turbine adopts passive self-protection and disconnects from the power grid, thereby ensuring the safety of the wind turbine. However, nowadays wind power accounts for a large proportion in ...

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Problems solved by technology

[0003] At present, the research on microgrid mainly focuses on the use of fan models with P-Q decoupling control as a continuously controllable reactive power source to participate in reactive power and voltage regulation, which will reduce the possibility of wind farm ride-through faults and affect the power grid. The damage increases

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