变频空调负荷虚拟同步机化改造及其参与微网互动调控

为了提高微网系统运行的安全稳定性,充分发掘海量空调负荷资源的可调潜力,从而增强负荷响应自主性,在对空调压缩机电机控制电路改造的基础上,提出了一种变频空调负荷虚拟同步机群参与微网调频的控制方法。首先对变频空调压缩机电机进行负荷虚拟同步机控制改造,建立其控制模型;然后将空调压缩机电机进行聚合等值,便于其参与微网互动调控;接着建立了变频空调负荷虚拟同步机群参与微网互动的控制架构;最后提出变频空调负荷参与微网一次和二次调频的策略,并通过对变频空调负荷虚拟同步机群控制仿真,验证了负荷虚拟同步机化改造能够有效提升空调负荷参与调频的能力。

Virtual synchronous machine transformation of inverter air conditioning load and its participation in microgrid interactive control

In order to improve the safety and stability of microgrid and fully explore the adjustable potential of mass air conditioning load resources, and enhance the autonomy of load response, a control method of the inverter air conditioning load virtual synchronous machine cluster participating in frequency regulation after transformation of compressor motor control circuit is proposed. Firstly, the inverter air conditioning compressor motor is modified for virtual synchronous machine controlling and the control model is established. Then, the inverter air conditioning compressor motors are aggregated to be an equivalent one, which facilitates the interactive regulation with the power grid. Afterwards, the control architecture of the inverter air conditioning load virtual synchronous machine cluster is established for participating in grid interaction. Finally, the strategy of inverter air conditioning load participating in primary and secondary frequency regulation of microgrid is proposed. The control simulation of the inverter air conditioning load virtual synchronous machine cluster is carried out, which verifies that the load virtual synchronous machine transformation can effectively improve the ability of air conditioners participating in frequency modulation.