一种基于新息图法的配电网参数估计
首发时间:2019-06-10
摘要:针对配电网中的支路阻抗参数错误问题,文中提出一种基于新息图法的参数估计方法。该方法依据有功新息识别电阻参数错误,依据无功新息识别电抗参数错误。对于配电网中的辐射支路参数错误,根据新息差路径进行辨识,并根据支路量测求得支路功率损耗,进而估计出参数真实值。对于弱环支路参数错误,根据新息不良回路确认可疑支路后再通过求取可疑支路上的参数估计值锁定参数错误支路。文中通过IEEE33节点配电系统的算例验证了算法的正确性和有效性。
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Parameter Estimation of Distribution Network Based on the innovation graph
Abstract:In this paper, aiming at the problem of branch impedance parameter errors in distribution network, a parameter estimation method based on innovation graph is proposed. This method identifies resistance parameter errors based on active power innovation and reactance parameter errors based on reactive power innovation. For the errors of radiation branch parameters in distribution network, the innovation difference path is used to identify the errors, and the branch power loss is calculated according to the branch measurement, then the true value of the parameters is estimated. For the parameter errors of weak loop branch, the parameter error branch is determined by parameter estimation of suspected branch after confirming the suspected branch according to the bad innovation loop. The correctness and validity of the algorithm are verified by an example of IEEE33.
Keywords: power system distribution network parameter estimation innovation graph
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