PI-PD控制在风水微网中的应用  

Application of PI-PD Control in Wind-hydro Micro-grid

作　　者：关欣[1] 南海鹏[1] 王源[1] GUAN Xin;NAN Haipeng;WANG Yuan(Xi'an University of Tech no logy,College of Water Conservancy and Hydropower Engineering,Xi'an 710048,China)

机构地区：[1]西安理工大学水利水电学院

出　　处：《高电压技术》2019年第7期2177-2184,共8页High Voltage Engineering

基　　金：国家自然科学基金(51379174)~~

摘　　要：风水微网中,风电的间歇性和波动性容易造成微网功率波动频繁,恶化微网电能质量。为平滑风水微网输出功率,提出将PI-PD控制方法应用到微网内水电机组控制中,采用频域分析法分析了常规PID控制及PI-PD控制对水电机组的控制效果,提出改善水机动态响应过程的参数调整方法;建立了风水微网仿真模型,通过时域仿真比较了微网内水机采用常规PID、模糊PID和PI-PD算法的控制效果,并分析了PI-PD控制参数对微网内部动态响应的影响。理论和仿真分析结果表明,与常规PID及模糊PID相比,微网中水机采用PI-PD控制能够获得较快的调节速度、较小的反调量;合理整定PI-PD控制参数值,能够缩短微网动态响应时间,抑制微网功率振荡,保证微网安全稳定运行。In wind-hydro micro-grid, the intermittence and volatility of wind power easily cause power fluctuation frequently and worsen the power quality. Consequently, we proposed to apply the PI-PD control method to the control system of the hydropower unit in the micro-grid,and analyzed the control effect of conventional PID and PI-PD control on the hydropower unit by frequency domain analysis method. Moreover, we proposed to adopt the parameters adjusting method to improve the dynamic response of the hydropower unit. Meanwhile, we established awind-hydro micro-grid simulation model, analyzed the influences of conventional PID, fuzzy PID and PI-PD control on the dynamic response of the micro-grid by time domain simulation method, and analyzed the influence of different PI-PD controller parameters on the dynamic response of the micro-grid. Theoretical analysis and simulation results show that, compared with the PID and fuzzy PID control method, the PI-PD control can achieve faster adjustment speed and smaller inverse quantity adjustment. Reasonable setting parameters of the PI-PD control can shorten the dynamic response time of the micro-grid, restrain the power fluctuation, and ensure the safe and stable operation of the micro-grid.

关 键 词：风水微网 分布式能源控制 PI-PD 有功功率 振荡 

分 类 号：TM73[电气工程—电力系统及自动化]