Research On Decoupling Method Of Low Voltage Microgrid

The technology of Microgrid is an efficient and feasible way for the utilization of distributed energy.Being controlled by the power grid as an intelligent unit,microgrid can provide high quality power and strong support for the safe and reliable operation of the power grid and realizes the reasonable use of distributed energy.Without thorough and stable control system,microgrid can't sustain flexible operation modes and high quality power supply services,and the independent active and reactive power control of microsource is a burning question.In this paper,the decoupling control method for low voltage microgrid was studied.The research background and significance,an overview of microgrid and its domestic and abroad development situation,the study status of the decoupling control of microgrid were comprehensively introduced;The control system of inverter in microgrid was designed;The objective function diagonalization decoupling control for microgrid power based on relative gain analysis was proposed for the coupling problem in microgrid,which quantized the control channel coupling degree,and realized the active power and reactive power independent control;A voltage stabilization decoupling control method for microgrid was proposed for the power coupling problem in island microgrid,realizing the power decoupling in microgrid and ensuring its voltage stabilization.The proposed method realizes the independently,precisely,flexibly control of the active power and reactive power,and improves the controllability of microgrid,assuring the stable,high quality and safe operation of microgrid.