基于灰色滚动预测模型的多接口变换器功率直接控制方法

Direct power control method of multi interface converter based on grey rolling prediction model

交流侧不平衡状况下,多接口变换器功率控制效果的瞬时效果较差,动态输出功率预测结果准确性较低,无法使调节功率达到既定功率,由此,提出基于灰色滚动预测模型的多接口变换器功率直接控制方法。构建电网功率灰色滚动预测模型,确定应输出功率。构建多接口变换器单元电路模型,计算电网运行模式转换状态下的功率波动量。选用PID控制器,优化多接口变换器功率控制算法,对变换器输出功率进行补偿与控制。实验结果表明:该方法可在多种电网运行状态下对多接口变换器功率进行控制,使其与既定功率具有一致性,预测结果准确性得到提升,保证多接口变换器功率控制效果的瞬时效果,电网稳定运行。

When the AC side is unbalanced,the instantaneous effect of the power control effect of the multi interface converter is poor,the accuracy of the dynamic output power prediction result is low,and the regulated power cannot reach the set power.Therefore,a direct power control method of the multi interface converter based on the gray rolling prediction model is proposed.The grey rolling prediction model of power grid is established to determine the output power.The unit circuit model of multi interface converter is built to calculate the power fluctuation under the operation mode switching state.The PID controller is selected to optimize the power control algorithm of the multi interface converter,and the output power of the converter is compensated and controlled.The experimental results show that this method can control the power of the multi interface converter under various power grid operation conditions,make it consistent with the established power,improve the accuracy of the prediction results,ensure the instantaneous effect of the power control effect of the multi interface converter,and ensure the stable operation of the power grid.