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中国电机工程学报 2007, 27(31) 27-32 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电力系统 |
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基于主从分裂法的交直流混合状态估计 |
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孙宏斌 李大志 刘崇茹 张伯明 |
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清华大学电机系电力系统国家重点实验室 清华大学电机系电力系统国家重点实验室 清华大学电机系电力系统国家重点实验室 清华大学电机系电力系统国家重点实验室 |
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摘要：
直流输电技术的快速发展迫切要求提出实用的交直流混合状态估计方法。该文将交流系统看成主系统，将直流系统看成从系统，提出了交直流混合状态估计的一种新方法，即主从分裂法。该方法自然地将整个电力网络的状态估计问题分解成交流估计和直流估计两个子问题，通过主从分裂迭代，可获得严格的全局状态估计解。其中，交流系统和直流系统可以采用不同的状态估计算法，只需对调度中心现有状态估计软件进行少量修改，即可实现交直流混合状态估计。理论分析和数值试验结果均表明了新方法的实用性、正确性和良好的收敛性。
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关键词：
交直流混合电力系统
状态估计
主从分裂法
加权最小二乘状态估计
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Master-slave-splitting Method Based State Estimation for AC/DC Hybrid Power Systems |
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Abstract:
With rapid development of HVDC technologies, development of practical methods for AC/DC hybrid power system state estimation is an emergent demand. In the whole AC/DC hybrid power system, AC part is considered as master system, while DC part is considered as slave system in the paper. Then a new method named as master-slave-splitting is proposed for AC/DC hybrid power system state estimation. In the new method, the problem of state estimation for whole power system is naturally split into two sub questions, one is AC system estimation and the other is DC system estimation. Based upon master-slave- splitting iteration, rigorous solution of the whole AC/DC hybrid power system state estimation can be achieved, and different algorithms are adopted for estimation of AC and DC systems respectively. The new method can be implemented in existed state estimation module in control center with minor modification of software. Both theoretical analysis and numerical tests verify practicability, validity and convergence of new method.
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Keywords:
AC/DC hybrid power system
state estimation
master-slave-splitting method
weighted least square state estimation
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收稿日期 2006-08-22 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 孙宏斌 |
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作者简介: |
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作者Email: shb@mail.tsinghua.edu.cn;shb@tsinghua.edu.cn |
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| Copyright by 中国电机工程学报 |
