交直流混联系统协调控制技术

Coordinated Control Technology for AC/DC Hybrid System

交直流混联系统的协调控制是保证其安全、可靠运行的关键技术之一,亟待展开深入研究。对交直流混联系统协调控制技术进行分析总结,从交流子网协调控制、直流子网协调控制以及交直流混联系统的互联设备、协调控制与附加阻尼控制等方面,阐述了交直流混联系统的国内外研究现状与存在问题,在梳理交直流混联系统中交/直流子网以及系统各层级协调控制技术的基础上,进一步探讨了电力电子变压器等新型设备接入、多变换器负阻抗特性影响下的协调控制新特点,为交直流混联系统研究提供一定的控制理论及方法基础。

The coordinated control of an AC/DC hybrid system is one of the key technologies to ensure its safe and reli able operation, and it is urgent to carry out in-depth research. We analyze and summarize the coordinated control technology of the low-voltage AC/DC hybrid system. Moreover, we described the state-of-arts and existing problems from the aspects of AC sub-network coordinated control, DC sub-network coordinated control, interlinking equipment of AC/DC system, coordinated control of AC/DC system, and additional damping control of AC/DC system. Meanwhile, we explored the new features of coordinated control under integration of new equipment such as the power electronic trans formers and multi-converter negative impedance characteristics, based on the analysis of the coordinated control technology at the various levels of the AC/DC hybrid system, including the AC sub-network, DC sub-network, and the whole system. The research results can be adopted to provide some foundations for researching the control theory and method of AC/DC hybrid system.