Unit Commitment of Power System with Wind Power and Photovoltaic Considering Frequency Safety Constraint

With the large-scale wind turbine and photovoltaic increase, the inertial response of the power system and ability of primary frequency modulation are reduced, which makes the frequency safety problem stand out gradually. It is particularly important to consider the frequency dynamic safety constraint in day-ahead generation scheduling. In this paper, a frequency safety constraint construction method considering the frequency nadir is proposed. Wind power and photovoltaic integrated inertial control are introduced to enable wind turbines and photovoltaic. Based on that, considering the frequency dynamic safety constraint with wind power and photovoltaic integrated inertial control of the unit commitment model is established. Then, the M language is used to dynamically control the frequency response model of multi-machines for Simulink, which is also embedded in the particle swarm optimization algorithm with changing weight for the model solution. The consequences of the IEEE24-bus system with wind power and photovoltaic indicate that model and method can assure the frequency nadir and frequency safety margin meeting requirement.