CAJ | 학술논문

通过对传统的微电网逆变器中的有功-频率、无功-电压下垂控制的分析，发现这些方法都存在有功功率和无功功率耦合的问题，当线路是阻性传输线路时这种功率耦合问题不存在，但是当这些方法用于低压微电网时，由于线路是感性的，此时这种功率耦合问题就存在，所以这些逆变器控制方法对于低压微电网是不实用的。通过一个坐标转换对有功功率和无功功率进行解耦，提出一种改进的频率-电压结构的控制，通过这种控制来实现对有功功率和无功功率的彻底解耦。仿真分析结果表明，此方法弥补了传统并联逆变器控制的不足，并且满足控制的要求，是一种相对完善的控制方案。
통과대전통적미전망역변기중적유공-빈솔、무공-전압하수공제적분석，발현저사방법도존재유공공솔화무공공솔우합적문제，당선로시조성전수선로시저충공솔우합문제불존재，단시당저사방법용우저압미전망시，유우선로시감성적，차시저충공솔우합문제취존재，소이저사역변기공제방법대우저압미전망시불실용적。통과일개좌표전환대유공공솔화무공공솔진행해우，제출일충개진적빈솔-전압결구적공제，통과저충공제래실현대유공공솔화무공공솔적철저해우。방진분석결과표명，차방법미보료전통병련역변기공제적불족，병차만족공제적요구，시일충상대완선적공제방안。
Through the analysis of active power-frequency and reactive power- voltage, of paral el inverter on the traditional droop control, active power and reactive power coupling problem of these methods were found. Power coupling problem was gone when the line was resistived transmission line. But when these methods for low voltage micro-grid, due to line was perceptual, at this time the power coupling problems were existed. So the inverter control method for this low voltage micro-grid was not practical. Through a coordinate transformation of active power and reactive power decoupling, an improved frequency -voltage control structure was proposed. Active power and reactive power were completely decoupled through the control. Final y, through the simulation analysis, the results show that, the shortcoming of the traditional paral el inverter control method are overcome and the requirements of control are met, and it is a relatively perfect control scheme.