Multi-Form Flexible Reactive Power Resource Cooperative Regulation Considering Voltage Quality and Auxiliary Service Cost

With the wide access to distributed renewable energy, the operation characteristics of power systems become increasingly complex, and the problem of voltage stability becomes increasingly prominent. The response effect only using traditional reactive power compensation devices is limited, which makes it difficult to meet the requirements of modern power systems for voltage quality and reactive power balance. The economic costs also need to be considered in pursuing efficient and stable operation of power systems. This paper proposes a cooperative regulation method for multi-form flexible reactive power resources considering voltage quality and auxiliary service cost. The generalized reactive power resources such as switching capacitors, photovoltaics, and electric vehicles are considered, and their reactive power response models are established. Then, a dual-objective regulation model of reactive power resources is established considering the degree of voltage deviation and the service cost of reactive power response. Finally, the simulation verification is carried out in a geo-power information coupling system, including the IEEE-33 bus distribution network. The results show that the proposed method not only improves the voltage stability of the power grid but also saves the cost of providing reactive support auxiliary services.