电力系统自动化2025，Vol.49Issue(22)：35-43,9.DOI:10.7500/AEPS20250617001
并网逆变器类振荡器无锁相环功率/电压统一控制器
Oscillator-resembled Phase Locked Loop-less Unified Power and Voltage Controller for Grid-connected Inverter
摘要
Abstract
The establishment of a new power system requires grid-connected inverters to be able to flexibly adapt to complex power grid conditions.The use of traditional dual-mode grid-following/grid-forming control for grid-connected inverters has problems of mode switching and complex control,while there exist problems of multiple control parameters and complicated design when virtual oscillator control is adopted.To this end,by referring to the oscillating voltage self-formation principle of nonlinear oscillators simulated through virtual oscillator control,an oscillator-resembled phase locked loop-less unified power and voltage controller(OR-PLL-less UPVC)for grid-connected inverters is proposed.The OR-PLL-less UPVC consists of power control module,voltage self-formation module,and voltage magnitude regulation module.First,the structure and operation principle of each module in OR-PLL-less UPVC are introduced,and the control law of the inverter output voltage is analyzed.Then,the state-space model of the system is established to analyze its small-signal stability.Finally,through simulation and real-time controller hardware-in-loop experiments,it is verified that the proposed OR-PLL-less UPVC can autonomously adjust the inverter port voltage under variations in parameters such as grid-side line impedance,power grid voltage/frequency,and track the power dispatching instructions,achieving the unified grid-following/grid-forming control under complex operating conditions.关键词
新型电力系统/逆变器/振荡器/锁相环/统一控制/功率调控/电压支撑Key words
new power system/inverter/oscillator/phase locked loop/unified control/power dispatch/voltage support引用本文复制引用
丁勇,茆美琴,张金桃..并网逆变器类振荡器无锁相环功率/电压统一控制器[J].电力系统自动化,2025,49(22):35-43,9.基金项目
国家自然科学基金资助项目(51577047) （51577047）
高等学校学科创新引智计划资助项目("111"项目)(BP0719039). This work is supported by National Natural Science Foundation of China(No.51577047)and the"111"Project(No.BP0719039). （"111"项目）
