Research on Voltage Control Strategy Based on PD-IoT with High Penetration of Photovoltaic Power Supply

With the continuous increase of distributed photovoltaic penetration in low-voltage power distribution network, the problem of voltage overlimit caused by insufficient photovoltaic accommodation ability becomes more and more prominent. The construction of Power Distribution Internet of Things (PD-IoT) provides a new way for voltage optimization control and photovoltaic consumption. Combined with the radial structure of low-voltage power distribution network, the voltage regulation ability of distributed resources is analyzed by using the chain rule, and the comprehensive voltage sensitivity is proposed to describe the voltage regulation ability of distributed resources. The voltage adjustment strategy considering the cost is designed, and the point-by-point regulation method is adopted to control the voltage overlimit rapidly, so as to achieve a balance between more photovoltaic power generation, smaller line loss and larger user benefits. The control method designed is suitable for multi-node voltage overlimit.