基于负荷模式能量的电力系统低频振荡抑制策略

随着电力市场化和需求侧管理的快速发展，以及虚拟电厂聚合平台的逐步成熟，负荷可控性越来越强，为从负荷侧抑制低频振荡提供了可能。针对系统在振荡过程中出现的小干扰稳定问题，提出了基于负荷模式能量的电力系统低频振荡调控策略。构建电力系统小干扰负荷模式能量函数，从负荷的角度揭示电力系统低频振荡特性。基于负荷模式能量建立负荷的低频振荡评价指标与灵敏度指标，确定负荷参与改善系统小干扰特性的调控方式，对所有可控负荷进行排序，筛选出最优调控负荷。最后，对3机9节点系统和16机68节点系统算例进行仿真计算，结果表明所提控制策略可有效抑制系统振荡。

Power system low-frequency oscillation suppression strategy based on load mode energy

With the rapid development of electricity marketization and demand-side management, as well as the gradual maturity of virtual power plant aggregation platform, the load controllability is getting stronger and stronger, which provides the possibility for suppressing low-frequency oscillation at the load side. Aiming at the small-disturbance stability problem in the system oscillation process, the power system low-frequency oscillation control strategy based on load mode energy is proposed. The energy function of the small-disturbance load mode for the power system is constructed, and the low-frequency oscillation characteristics of the power system are revealed from the perspective of load. Based on load mode energy, the low-frequency oscillation evaluation index and sensitivity index of load are established. The control method for load to participate in improving the small-disturbance characteristics of system is determined. Then, all controllable loads are sorted to select the optimal control load. Finally, simulations are carried out for the 3-machine 9-bus system and 16-machine 68-bus system, and the results show that the proposed control strategy can effectively suppress system oscillation.