面向新型电力系统的电力电子变流器虚拟同步控制方法评述

Review on Virtual Synchronous Generator Control Technology of Power Electronic Converter in Power System Based on New Energy

双碳目标的实现需要构建以新能源为主体、源网荷储融合的新型电力系统,同步发电机的减少必然导致电力系统惯量和阻尼逐渐降低,进而带来电力系统稳定性问题,虚拟同步控制是提高新能源对电网主动支撑能力的有效手段。整理了国内现有新能源并网标准中对虚拟同步机支撑电网的要求,全面梳理了虚拟同步控制技术的研究动态和已有成果,归纳了电压支撑和功率支撑2类虚拟同步控制实现过程及其优化。并建立了其他电网支撑控制策略与虚拟同步控制技术的等效关系,从参数设计的角度将其统一在虚拟同步控制框架中。最后,对虚拟同步控制技术在新能源主动电网支撑中的应用做出了展望。

The realization of the double-carbon goals requires the construction of a new power system with new energy as the main body and the integration of source, network, charge and storage. The reduction of the synchronous generators inevitably leads to the gradual reduction of inertia and damping of the power system, which further causes the problem of power stability. Virtual synchronous generator control technology(VSG) is an effective means to improve the active support capability of new energy to the power grid. In this paper, the requirements of the existing domestic new energy grid-connected standards for the VSGs to support the power grid are sorted out, the research trends and the existing achievements of the VSG are comprehensively combed, and the realization process and optimization of voltage-support and power-support-typed VSG are summarized. The equivalent relationship between the other power grid support control strategies and the VSG is established, which is unified in the VSG framework from the point of view of parameter design. Finally, the application of VSG in the new energy active power grid support is prospected.