基于Popov理论的微电网逆变器控制策略研究

Study on Power Quality Control Strategy of Microgrid Inverter Based on Popov Theory

微电网中的电能质量受到发电侧与负荷侧的共同影响,传统治理方式采用在微电网设置电能质量治理装置或在逆变器中采用鲁棒控制、二次调节等方法,但传统控制策略往往只针对微电网中的特定的电能质量问题,处理复杂的电能质量问题效果不佳。在微电网电压型逆变器的基础上,提出了一种基于Popov理论的控制策略。在逆变器中设计Popov控制器,以保证微电网逆变器在多种负载工况下的控制性能,从而使得微电网电能质量良好。算例验证表明,在不同工况下,逆变器的控制性能均能保持良好,从而保证微电网中的电能质量。

The power quality in the microgrid is affected by the power generation side and the load side.In the traditional control method,the power quality management device is set in the microgrid,alternatively,the control strategies such as robust control and secondary regulation are applied to the inverter.However,traditional control strategies often only target specific power quality problems in microgrids,they are not effective in dealing with complex power quality problems.On the basis of the microgrid voltage-controlled inverter,a control strategy based on Popov theory was proposed.The Popov controller was designed in the inverter to ensure the control performance of the microgrid inverter under a variety of load conditions.As a result,the power quality of the microgrid is better.The verification of the calculation example shows that the control performance of the inverter can be maintained well under different working conditions,and the power quality in the microgrid is guaranteed.