This paper proposes a coherent strategy for active reactive support of household photovoltaics with high penetration rate in rural low-voltage areas taking into account unbalanced access
and especially does not rely on reactive power adjustment devices such as SVG. Firstly
household photovoltaic inverters with single-phase and three-phase access are taken as the objects of active reactive regulation
and a high-penetration household photovoltaic refined variable weight multi-objective optimization model is constructed taking into account the three-phase imbalance and the real-time output characteristics of photovoltaic-load during the day and night to meet the control requirements under different working conditions of the area. Secondly
the economy
stability and computational complexity of the regulation of each inverter in the continuous period are further considered
and the full-time active support strategy of the area based on the third-generation non-dominated sorting genetic algorithm (NSGA-Ⅲ) and coherent control is designed to efficiently calculate the three-phase asymmetric power flow and achieve smoother household photovoltaic coordinated reactive regulation. The calculation results show that the proposed method can fully tap the active support potential of high-penetration household photovoltaics
improve the comprehensive power quality of rural low-voltage substations
reduce substation network losses
and improve the stability and economy of distribution network operation.