信息物理融合的孤岛微网有功协同控制方法

智能电网背景下的孤岛微网是典型的信息物理系统(CPS),在面对通信安全威胁、需求侧主动参与控制、分布式电源"即插即用"等新问题时,需要拓展传统的信息物理融合思维,开发不完全依赖于中央控制器的协同技术。基于此,提出了含有以频率为触发信号的需求侧单元、可再生能源发电、柴油发电及电池储能单元的孤岛微网有功控制模型。提出了一种完全分布式的协同控制方法使系统能以经济最优的方式实现频率的快速恢复,分为一致项、频率反馈和反馈系数设定这3个部分。其中一致项控制各发电单元遵循等微增率准则运行,频率反馈控制系统频率的快速恢复,计及了全局感知信息和误差校对信息的反馈系数,提高了系统的控制性能。仿真算例验证了所述模型与方法的有效性与可靠性。

Collaborative Method for Active Power Control of Cyber Physical Island Microgrid

Island microgrid is a typical cyber physical system(CPS)under the background of smart grid. To deal with the new issues such as the threat of communication security, the participation of demand side for system control, and the plug and play mode of distributed generators(DGs), the traditional thinking on cyber-physical integration should be stretched, and the no-control-center collaborative techniques should be developed. An active power control model is proposed for island microgrid, which contains frequency-trigger demand response units, renewal generation units, diesel generation units, and battery energy storage system units. A fully distributed collaborative method is proposed, which is capable of recovering system frequency in a best economic way. The proposed algorithm can be decomposed into three parts of consensus term, frequency feedback and feedback coefficients. The consensus term regulates generation units obeying the equal increment criteria, the frequency feedback is responsible for quickly recovering system frequency, and the coefficients with information of both global perception and error proofreading are used to enhance the control performance. The effectiveness and reliability of the proposed model and method are verified by simulations. This work is supported by National Natural Science Foundation of China(No. 51577049).