Frequency Stability Control Strategy of The Receiving Power Grid Based on Multiple Resources

Abstract

When a large-scale interconnected system encounters a major disturbance, it will actively disassociate, and the receiving-end power grid will suffer from serious shortage of active power and a significant drop in frequency. Emergency control measures need to be taken to ensure the stability of the receiving-end power grid system. First, according to the different control characteristics of the generator's primary frequency modulation, pumped storage power station, and low-frequency load shedding, the mathematical model of the emergency control strategy is formulated. Then, according to the characteristics of the active disassembly of the power grid, the equation constraints in the model are simplified, and the heuristic algorithm with the participation factor as the basic element is used to calculate how the resources of the strategy are allocated and input to obtain the quantitative indicators of each resource. Finally, the feasibility of multi-resource frequency stability control and section correction control strategies is verified and compared through IEEE39 node simulation. The simulation results show that the coordinated implementation of multiple resources can ensure timely control of the system frequency and minimize the failure loss; at the same time, considering that the power limit is exceeded and the power transfer of the receiving end is too large, the section correction control is proposed Strategy has a great optimization effect.