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考虑不确定区域的敏感设备电压暂降兼容能力分析
Analysis of voltage sag compatibility capability based on improved maxi-mum entropy method
投稿时间:2018-10-01  修订日期:2019-01-14
DOI:
中文关键词:  敏感设备  电压暂降  兼容能力  改进最大熵法  故障概率分布函数关键词
英文关键词:sensitive equipment  voltage sag  compatibility  improved maximum entropy method  fault probability distribution function
基金项目:南方电网公司科技项目资助(GZHKJ00000002)
作者单位E-mail
马智远 广州供电局有限公司 402989002@qq.com 
周凯 广州供电局有限公司 285358753@qq.com 
李晨懿 华北电力大学 1903539506@qq.com 
汪坤 华北电力大学 303523850@qq.com 
徐永海 华北电力大学 yonghaixu@263.net 
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中文摘要:
      研究敏感设备的电压暂降兼容能力是十分重要的问题。本文对传统方法进行了理论研究,分析了其存在的不足,并提出了一种考虑不确定区域兼容概率的敏感设备电压暂降兼容能力分析方法,建立设备侧和电网侧的故障概率模型,并选取合适的分布函数建立设备侧和电网侧的故障概率分布函数,进而计算设备耐受曲线不确定区域中的兼容概率和总兼容次数,更加准确地描述了敏感设备的耐受特性,从而较大程度上提高了评估精度。通过实例分析,并与传统拟合方法和兼容能力分析方法作比较,本文建议采用改进最大熵法对设备侧和电网侧的故障概率分布函数进行拟合。本文方法能够为电网、治理厂商和敏感设备用户提供精确的设备与电网暂降兼容性评估结果,给敏感设备的暂降兼容能力分析提供重要参考。
英文摘要:
      It is very important to study the compatibility of voltage sag for sensitive equipment. In this paper, the traditional method is studied theoretically, and its shortcomings are analyzed. A method for analyzing voltage sag compatibility capability of sensitive equipment considering uncertain area is proposed to establish the fault probability models of equipment and power grid, and the fault probability distribution functions of equipment and power grid are established by selecting appropriate distribution functions. Further the compat-ibility probability in the uncertain area and total compatibility times are calculated, which makes a more accurate description of the compatibility and results in great improvement of evaluation accuracy. Compared with traditional probability fitting methods and compatibility analysis method, it is suggested that the improved maximum entropy method be used to fit the failure probability distri-bution function of equipment and power grid. Moreover, it can provide more accurate evaluation results and important reference for the grid, governance manufacturers, and sensitive equipment users.
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