Voltage stability bifurcation of large-scale grid-connected PV system

被引：0
|
作者：
Li S. [1 ,2 ]
Wei Z. [1 ]
Sun G. [1 ]
Gao P. [2 ]
Xiao J. [2 ]
机构：
[1] College of Energy and Electrical Engineering, Hohai University, Nanjing
[2] School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing
来源：
| 1600年 / Electric Power Automation Equipment Press卷 / 36期
关键词：
Grid-connection; Irradiance intensity; Large-scale photovoltaic power plant; Linear feedback control; Unstable Hopf bifurcation; Voltage stability;
D O I：
10.16081/j.issn.1006-6047.2016.01.003
中图分类号：
学科分类号：
摘要：
The numerical bifurcation software MATCONT is applied in the parameter bifurcation analysis for classic 3-bus system with large-scale PV(PhotoVoltaic) power plant. The results of single-parameter bifurcation analysis show that, system has an unstable Hopf bifurcation, harmful to the load voltage stability. The results of double-parameter bifurcation analysis show that, when PV power plant operates with lagging power factor, system has PV active power output with the maximum voltage stability domain, which can be taken as the maximum PV installation capacity;when PV power plant operates with leading power factor, the system voltage stability domain becomes narrow. The sudden drop of irradiance intensity may bring adverse effect on the load voltage stability when PV power plant operates with lagging power factor;the more active power the PV power plant outputs, the more serious effect it brings. The linear feedback control of system equivalent generator angle velocity may delay and even totally eliminate the unstable Hopf bifurcation, which allows system to take the saddle-node bifurcation point as the critical point of voltage stability for the great expansion of its voltage stability domain, and also helps the quick recovery of load voltage when the irradiance intensity drops suddenly. © 2016, Electric Power Automation Equipment Press. All right reserved.
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页码：17 / 23
页数：6
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