Research on Event‐Triggered Based Flexible Frequency Modulation Method for Thermal Power Connected to System With Large‐Scale Wind Power

ABSTRACT

With the increasing penetration of renewable energy in the power grid, the new power system will face the problem of shortage of deterministic frequency modulation resources. To this end, based on the analysis of frequency modulation principle and control strategy of traditional thermal power units, this paper proposes a new generalised PID stability control mechanism with the ability of optimising resource allocation. In addition, considering the characteristics of signal propagation speed in communication network, a fast frequency modulation control strategy for thermal power units based on event‐triggered is proposed. Finally, a comparative simulation is carried out in the improved 2‐zone, 4‐machine systems containing wind power. The results show that the proposed method can not only improve the frequency response speed of the system but also make full use of the advantages of sufficient and controllable thermal power frequency modulation resources, thus effectively improving the frequency stability problem caused by under‐support in the new power system.