摘要
下垂控制策略被普遍应用于微电网孤岛运行模式下的电源控制中,但传统下垂控制策略存在投切负载时稳态电压和频率偏离额定值的问题,难以保障电能质量。针对于此,本文采用类似电力系统二次调频的策略对电源下垂特性进行平移,经改进后的下垂特性能够实现微电网频率和电压的无差调节,使微电网频率、电压能够自动恢复到电力系统所能承受的范围内,从而保证了微电网的电能质量,对微电网的控制具有一定的理论价值和工程实用意义。
Droop control strategy is widely used in micro grid island operation mode,but when the load is dropped,the traditional droop control strategy has the problem of the steady-state voltage and the frequency deviation,and it is difficult to guarantee the power quality.Using the strategy similar to power system secondary frequency modulation to translate the power droop line,the improved droop control strategy can realize no difference of power grid frequency and voltage regulation.It makes the micro grid frequency and voltage automatically restored to the range that power system can withstand,so as to ensure the micro grid power quality.The control of the micro grid has certain theoretical value and engineering practical significance.
作者
毛晓姝
解晨
王语园
MAO Xiao-shu;XIE Chen;WANG Yu-yuan(Department of Electrical and Information Engineering,Shaanxi Railway Institute,Weinan 714000 China)
出处
《自动化技术与应用》
2018年第12期111-113,122,共4页
Techniques of Automation and Applications
关键词
分布式发电
微电网
下垂控制
孤网模式
二次调频
distributed generation
micro grid
droop control
islanding mode
secondary frequency modulation
