构网型储能支撑新型电力系统建设的思考与实践

构网型储能因具备类似常规发电机控制响应特性而受到广泛关注，被视为支撑新型电力系统建设的关键装备。目前针对该技术的研究大多针对微电网应用场景，尚无大电网应用层面的系统级研究。基于该情况，首先在构网型控制技术原理的基础上提出构网型储能建模方法。并结合构网型储能电压源的本质属性，推导其接入系统后参与系统功率分配机制，探讨其在电网装机占比问题。最后，以国内某工程为案例，开展构网型储能模型搭建及在大电网应用场景下的仿真分析。结果表明，所提的建模和分析方法能够指导构网型储能的系统级工程应用。

Theory and practice of grid-forming BESS supporting the construction of a new type of power system

Grid-forming BESS has gained a lot of attention because of its control response characteristics being similar to conventional generators, and is regarded as the key equipment to support the construction of new type of power system. Most research on this technology is currently focused on micro grid application scenarios, and there is no system level research on large grid application. Given this, a modeling method of grid-forming BESS is proposed based on the principle of grid-forming technology. Then the mechanism of grid-forming BESS participating in power sharing is deduced based on the essential properties of voltage source, and the capacity for its proportion in the power grid is discussed. Finally, taking a domestic project as an example, a grid-forming BESS model is built and then simulation analysis is made for a large power grid application scenario. The results show that the modeling and analysis methods proposed in this paper can guide the system level engineering application of grid-forming BESS.

This work is supported by the National Key Research and Development Program of China (No. 2021YFB2400805).