电源电压矢量快速定位的AC/DC变换器选择性控制

Selective Control for AC/DC Converter Based on Fast Location of Power Supply Voltage Vector

为了提高交直流配电网中柔性互联装置的控制精度和扰动抑制能力,避免冗余计算问题,提出了一种基于电源电压合成矢量快速定位的AC/DC变换器功率选择性控制方法。采用一种并行处理的逻辑计算方法获得电源电压矢量所在扇区,避免了传统功率控制中的坐标变换和锁相环节,节省了处理器资源;在功率内环制定了开关选择优先级,在固定时间间隔内结合场景需求实现开关状态的实时选择。与传统功率控制策略的仿真和实验对比,进一步验证了所提选择性控制方法在稳态控制精度、扰动抑制以及暂态响应方面的优越性。

In order to improve the control accuracy and disturbance suppression ability of flexible interconnection devices in AC/DC distribution network and avoid redundant calculation problem,a power selective control method for AC/DC converter based on the fast location of power supply voltage vector is proposed.A method of parallel logic processing is used to obtain the sector where the power supply voltage vector is located,which avoids the coordinate transformation and phase lock in the traditional power control and saves the processor resources.The priority of switch triggering is determined in the power inner loop,and the real-time selection of switch state can be realized in a fixed interval according to the scenario requirements.Compared with the simulation and experiments of traditional power control strategy,the advantages of the proposed selective control method in steady-state control precision,disturbance suppression and transient response are further verified.