引用本文: | 孙国强,李育燕,卫志农,叶 芳.含VSC- HVDC的交直流混合系统状态估计[J].电力自动化设备,2010,(9): |
| SUN Guoqiang,LI Yuyan,WEI Zhinong,YE Fang.State estimation of power system with VSC-HVDC[J].Electric Power Automation Equipment,2010,(9): |
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摘要: |
针对以电压源换流器(VSC)为基础的新一代高压直流输电(HVDC),对含VSC-HVDC的交直流混合系统进行静态状态估计。介绍了VSC-HVDC的稳态模型,通过确定交直流混合系统的量测函数、状态变量和雅可比矩阵,建立了含VSC-HVDC的交直流混合系统的状态估计模型;在基本加权最小二乘状态估计算法的基础上,提出了含VSC-HVDC的交直流混合状态估计同时迭代求解法;对经过修改的IEEE 14、IEEE 30、IEEE 57节点系统算例进行仿真,从算法的估计误差、迭代次数和计算速度等方面验证了算法的有效性和实用性。 |
关键词: 直流输电 电压源换流器 VSC-HVDC 静态状态估计 交直流混合系统 |
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基金项目:国家自然科学基金资助项目(50877024);河海大学自然科学基金资助项目(2009421411) |
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State estimation of power system with VSC-HVDC |
SUN Guoqiang1, LI Yuyan2, WEI Zhinong1, YE Fang1
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1.College of Energy and Electrical Engineering,Hohai University,Nanjing 210098,China;2.Guodian Nanjing Automation Co.,Ltd.,Nanjing 210003,China
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Abstract: |
The static state estimation of power system with VSC-HVDC is carried out for the HVDC(High Voltage Direct Current) transmission based on VSC(Voltage Source Converter). The steady model of VSC -HVDC is introduced,the measurement equations,state variables and Jacobian matrix of hybrid AC/DC system are determined and the state estimation model of power system with VSC-HVDC is built. A uniform iterative algorithm based on the WLS(Weighted Least Square) is proposed to get the solution. Simulations are carried out for the modified IEEE 14-bus,IEEE 30-bus and IEEE 57-bus systems,which shows the effectiveness and practicality of the algorithm in terms of estimation error,iteration times and calculation speed. |
Key words: HVDC transmission VSC VSC-HVDC static state estimation hybrid AC/DC system |