Collaborative Voltage Regulation Strategy of Distributed Photovoltaic Inverter with Limited Distribution Area Information

In allusion to the practical problems of limited measurement information and insufficient computing resources in low-voltage distribution area, a collaborative voltage regulation strategy for active power and reactive power of photovoltaic inverters was proposed based on voltage sensitivity matrices derived from actual measurement. Firstly, voltage sensitivity matrices of active power and reactive power regulation were obtained by adjusting the photovoltaic output and observing the node voltage shifting. Secondly, considering the capacity and power factor constraint of inverters, a linear optimization model for collaborative voltage regulation of multiple photovoltaic inverters was proposed to maximize the active output and minimize the reactive output under the premise of ensuring the voltage quality. Finally, a rural distribution area is selected as the study case to verify the effectiveness, control accuracy and calculation speed of the proposed strategy. The results show that by fully utilizing inverter’s reactive power regulation capacity, the proposed strategy can reduce the waste of photovoltaic energy on the basis of accurate voltage regulation of the distribution network with relatively fast solving speed, which make it feasible for limited computing resources in real distribution area.