基于储能的风电机组故障电压穿越自适应协调控制

Adaptive Coordinated Control of Fault Voltage Ride-through for Wind Turbine Based on Energy Storage

为解决风电机组故障电压穿越所需储能容量大的问题,保证机组并网稳定性,提出一种基于储能的风电机组电压穿越自适应协调控制方法。所提控制方法在风电机组并网公共连接点处配置储能,根据储能与转子调节功率余量,引入自适应协调系数,实时分配储能补偿功率与转子惯性调节功率,实现风电机组与储能之间的协调控制。故障期间,转子能够及时响应并调节转速,使得转速保持在允许范围内,有利于风电机组承受长时间的连续电压穿越。同时,相较于无协调控制和固定比例系数协调控制,所提控制方法能够进一步减少故障期间所需储能补偿功率与容量。最后,建立双馈感应与永磁同步风电机组仿真模型,进行了电压连续穿越的对比仿真,同时搭建硬件在环实验平台,进行实验验证。仿真和实验结果证明了所提自适应协调控制策略的有效性。

In order to solve the problem of required large energy storage capacity during wind turbine voltage ride-through and ensure the grid-connected stability of wind turbines,an adaptive coordination control method of voltage ride-through for wind turbines based on energy storage is proposed.The proposed control method configures the energy storage at the point of common coupling.According to the power margin of energy storage and rotor adjustment power,an adaptive coordination coefficient is introduced,and the compensation power of energy storage and adjustment power of the rotor inertia are distributed in real time.Thus,the coordination between the wind turbine and energy storage can be implemented.During the fault,the rotor can respond in time and adjust the speed within the allowable range,which is beneficial for the wind turbine to withstand long-term continuous voltage ride-through.Meanwhile,compared with the non-coordinated control and the fixed proportional coefficient coordinated control,the proposed control method can further reduce the required compensation power and capacity of the energy storage during the fault.Finally,the doubly-fed induction generator model and permanent magnetic synchronous generator model are built,and the comparative simulation of continuous voltage ride-through is carried out.Meanwhile,a hardware-in-loop experimental platform is built for the experimental verification.Simulation and experimental results demonstrate the effectiveness of the proposed adaptive coordinated control strategy.