CAJ | 학술논문

为提高低电压(Low Voltage，LV)微电网处于模式切换过程和孤网模式时负荷功率的稳定性，提出采用虚拟坐标变换下垂控制策略，以解决LV微电网采用传统下垂控制策略导致的分布式电源变流器输出有功功率和无功功率耦合性问题。利用有功功率和无功功率进行虚拟坐标变换与传统下垂控制策略相结合，在LV微电网模式切换过程和孤网模式时，采用传统下垂控制策略对变流器输出功率进行控制，然后对虚拟有功功率和虚拟无功功率进行虚拟坐标逆变换，完成对有功功率和无功功率解耦，进而可以满足负荷功率需求同时优化负荷电能质量。通过仿真，验证此控制策略的正确性和有效性。
위제고저전압(Low Voltage，LV)미전망처우모식절환과정화고망모식시부하공솔적은정성，제출채용허의좌표변환하수공제책략，이해결LV미전망채용전통하수공제책략도치적분포식전원변류기수출유공공솔화무공공솔우합성문제。이용유공공솔화무공공솔진행허의좌표변환여전통하수공제책략상결합，재LV미전망모식절환과정화고망모식시，채용전통하수공제책략대변류기수출공솔진행공제，연후대허의유공공솔화허의무공공솔진행허의좌표역변환，완성대유공공솔화무공공솔해우，진이가이만족부하공솔수구동시우화부하전능질량。통과방진，험증차공제책략적정학성화유효성。
This paper proposes a virtual frame transformation droop control strategy, to solve active and reactive power coupling of distributed generator converter generated by low voltage microgrid (LV microgrid) with traditional droop control strategy, and the stability of load power is improved when LV microgrid is in mode transition and islanding operation mode. Active power and reactive power virtual frame transformation is combined with traditional droop control strategy. When LV microgrid is in mode transition and islanding operation mode we can control the converter output power with traditional droop control strategy, then use virtual frame inversion transformation for virtual active power and virtual reactive power to realize a completely decoupled relationship between active power and reactive power, thus can both satisfy the demand of load power and optimize load power quality. The simulation proves the correctness and effectiveness of the control strategy.