智能电网中的电子电力变压器:改善电力系统可控性

摘要

现代电力系统正面临新的挑战,如提高可再生能源发电渗透率、增加用户参与需求侧响应、应对非线性负荷与敏感性负荷快速增长等.智能电网是解决或缓解这些问题的潜在途径.电网的智能化很大程度上依赖于电网的可控性,因此,提高可控性是实现更智能化电网的关键之一.本文较系统地阐述了利用电子电力变压器(EPT)提升电网可控性问题,详细分析了EPT的应用场景及典型案例.仿真结果验证了EPT在提升电力系统可控性方面的性能.%Today's electric power systems (EPSs) are facing new challenges including the increasing penetration of renewable generation,increasing participation of demand response from consumers,and rapid growth of non-linear and sensitive loads.The smart grid is expected as an effective approach to solving these problems.However,how controllable the grid is,how possibly smart the grid is.Making the EPS more controllable is the road to make it smarter.In this paper,electronic power transformer (EPT) is proposed to improve the controllability of the EPS.The application scenarios of the EPT are analyzed in detail.Three case studies including applying EPTs to the generation system,transmission system,and distribution system are analyzed.The simulation results demonstrate there are enormous potential of the EPT to enhance the controllability of the power systems.