Effect Of Large Scale Wind Power Integration On Power System AGC Control Parameters

With the sustained development of wind power industry, the problem of frequency control of power system integrated with large scale wind power has aroused more and more concerns. Although the proportion of the total installed capacity of wind power in China is still very small, the wind power industry in China was usually centrally developed, as a result, the wind power penetration in the some area networks may reach a high level. Engineering actual data and test results show that, with the increase of wind power penetration, the frequency control characteristic of power system has changed significantly, which has a significant impact on the setting of the control parameters of AGC (automatic generation control). So it is important and necessary to study the influence of large scale wind power integration on the AGC control parameters.The AGC control parameters include the frequency response coefficient and the AGC controller parameters, which are mainly determined by the power system unit regulating power and inertia time constant. Large scale wind power integration, replacing part of conventional generators, reduces the power system unit regulating power and inertia time constant, and therefore has a direct impact on the AGC control parameters. This paper firstly quantitatively analyzed the influence of large scale wind power integration on the power system unit regulating power and inertia time constant, on this basis, presented a mathematical model of AGC control parameters correction after large scale wind power integration. According to the model, the AGC control parameters can be corrected to adapt to the influence of large scale wind power integration to the operating characteristics of power system.Simulation analysis based on the IEEE 39 bus system verified the influence of large scale wind power integration on the power system unit regulating power and inertia time constant, and the correctness and effectiveness of correction of AGC control parameters for power system frequency control.