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。 Modern power systems are facing new challenges such as improving penetration of renewable energy generation, increasing user participation in demand-side response, responding to the rapid growth of non-linear and sensitive loads. Smart grids are potential solutions to these problems. The intelligence of the power grid relies heavily on the controllability of the power grid, so improving controllability is one of the keys to achieving a smarter grid. This article systematically expounded the use of electronic power transformer (EPT) to improve the controllability of the power grid, a detailed analysis of the EPT application scenarios and typical cases. The simulation results verify the performance of EPT in improving the controllability of power system.