中文摘要：

研究了电网中不同类型AGC机组在功率缺额下所应该承担的比例大小问题。采用标准PSO算法对CPS控制策略中AGC机组调节功率的分配进行机组种群优化。利用标准PSO算法，可以避免平均分配法较难得到最优解的缺陷，从而在经济性的条件下使CPS指标达到最优。通过算例进行仿真计算，证明了该算法的有效性。

英文摘要：

The proportion of different AGC unit under the shortfall of power in the grid is investigated. The paper adopts PSO algorithm to optimize units of AGC （automatic generation control） which regulate the distribution of power in the CPS controlling strategy. The optimal solution is hard to obtain by using average distribution but can be worked by using standard PSO algorithm, and then the CPS level can achieve the optimal one under economic conditions. The paper verifies the effectiveness of the algorithm by computing example simulation. This project is supported by National Natural Science Foundation of China（No.50807016）.