一种辅助同步发电机组的储能柔性控制策略

针对新能源大规模渗透下的系统惯量减少和电压调节恶化问题,提出一种储能辅助同步发电机组的柔性控制策略。将储能配置在同步发电机组的输出母线处,储能通过同步发电机组运行数据的反馈进行柔性控制,配合同步发电机组进行功率输出,二者有机结合形成新的发电单元——柔性同步机组,其等效惯量、内阻抗和阻尼可变。在所提控制策略下,储能工作在易于实现的电流源模式,可增加柔性同步机组的惯量和阻尼,改善电压动态并在稳态时提供针对性的无功支撑。仿真结果验证了所提策略的有效性。

A Flexible Control Strategy for Energy Storage Assisting Synchronous Generators

Aiming at the problems of the inertia reduction and reactive power regulation deterioration under the large-scale penetration of renewable energy, a flexible control strategy for energy storage assisting synchronous generators is proposed. Meanwhile, the energy storage is configured at the terminal bus of the synchronous generator, and these two measures form a unified power source: a flexible generator whose equivalent inertia, internal impedance, and damping are changeable. Under the proposed control strategy, the energy storage works in the easy-to-implement current source mode, increasing the inertia and damping of the flexible generator, improving the voltage dynamics, and providing targeted reactive power support in the steady-state. Simulation results verify the effectiveness of the proposed strategy.