Two-stage transient voltage safety prevention and control of sending-end power grid with high-proportion of wind power
To improve wind power absorption capacity and voltage support capacity,a two-stage transient voltage safety control strategy for wind power and energy storage coordination was studied for the sending-end power system with high renewable penetration level.In the first stage,the power flow optimization model of the power grid in the steady state stage was constructed with the goal of minimizing the cost of energy storage and wind power control.The interior point method was used to optimize the model and determine the optimal steady state operating point.In the second stage,considering the safety constraints of power grid transient voltage,a transient voltage safety prevention and control optimization model was established to minimize the degree of power flow operating point after steady-state optimization,and grey wolf optimization algorithm was applied to solve the problem and optimize the power flow operating point.Through the simulation of the modified Nordic power grid with high proportion wind farms,the proposed two-stage preventive control strategy could effectively improve the system's wind power absorption capacity and transient voltage safety preventive control level.
high proportion wind farmenergy storagewind power consumptiontransient voltage safetycoordinated control
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