基于合作博弈理论的互联电网AGC协调控制

A Coordinated AGC Strategy for Interconnected Power Grid Based on Cooperative Game Theory

为保证频率和联络线功率的控制效果及合理利用全网的AGC调节资源,提出了一种基于合作博弈理论的互联电网AGC协调控制。根据频率偏差绝对值的大小对系统运行状态进行等级划分,等级不同控制区频率偏差系数的设定方式不同,实现区域电网间AGC控制的协调配合。建立了AGC协调控制中各控制区收益的数学模型,包括互为备用少设置AGC调节容量所节省的费用模型和承担控制区之外调频责任所花费的费用模型,当系统处于联合调频区时,采用合作博弈的Shapley值和核仁模型对各控制区的收益通过周期性改变频率偏差系数的方法调整承担调频责任所花费的费用,实现各控制区收益的优化分配。采用三控制区互联电力系统进行仿真,结果验证了基于合作博弈理论的互联电网AGC协调控制的有效性。

To guarantee frequency and tie-line power control effect and make full use of AGC capacity resource, a coordinated AGC strategy for interconnected power grid is proposed based on cooperative game theory. Interconnected power system operation state is divided into different grades according to absolute value of frequency deviation. When system operates in different grades the way setting frequency bias coefficient is different, and AGC operations of different control areas can be coordinated. Profit models including AGC capacity demand profit model and frequency regulation obligation cost model are constructed for each control areas in AGC coordinated operation. When interconnected power system is in grade of coordination frequency control, frequency regulation obligation cost is adjusted through periodically changing setting of B coefficient calculated according to models of Shapley value and nucleolus in cooperative game theory, and the profits of all control areas are optimized. Simulations are conducted on three-area interconnected power system, verifying effectiveness of the proposed coordinated AGC strategy.