DFIG经VSC-HVDC并网系统统一潮流模型和并网点电压控制灵敏度算法  

UNIFIED POWER FLOW MODEL AND SENSITIVITY-BASED PCC VOLTAGE CONTROL ALGORITHM FOR POWER SYSTEM WITH DFIG INTEGRATED THROUGH VSC-HVDC

作　　者：李生虎[1] 孙婷婷 齐涛 薛婧 Li Shenghu;Sun Tingting;Qi Tao;Xue Jing(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《太阳能学报》2020年第11期31-37,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51877061);风电并网电力系统扰动稳定性灵敏度分析和控制措施优化2019-2020。

摘　　要：针对双馈感应电机(DFIG)经电压源变流器高压直流输电(VSC-HVDC)并网系统,采用改进平电压启动,建立计及DFIG结构的潮流模型。引入选择系数,实现可切换控制方式的VSC-HVDC潮流模型。考虑二者在公共耦合点(PCC)处相耦合,提出DFIG经VSC-HVDC并网系统统一潮流模型,推导PCC电压控制的潮流灵敏度算法。采用修改后IEEE-14节点系统,检验所提统一潮流模型的收敛性与灵敏度电压控制算法的有效性。For the power systems with the doubly-fed induction generator(DFIG)integrated through the voltage source converter-high voltage direct current(VSC-HVDC),the power flow model of the DFIG is established,which includes the configuration of the DFIG and uses the modified flat voltage start condition.The switch coefficients are introduced to realize power flow modeling to the VSC-HVDC for flexible control modes.With the two models combined at the point of common coupling(PCC),the unified power model of the power system with the DFIG integrated through the VSC-HVDC is proposed,based on which the sensitivity-based PCC voltage control algorithm is derived.The modified IEEE-14 bus system is applied to validate the convergence of the proposed unified power flow model and effectiveness of the proposed sensitivitybased voltage control algorithm.

关 键 词：HVDC输电 灵敏度分析 电压控制 风力发电 电网潮流 

分 类 号：TM614[电气工程—电力系统及自动化] T721[一般工业技术]