基于LIHM的配电系统电能质量动态有向评价
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摘要
针对电能质量评价中指标数据存在的异质性及波动性,提出一种基于极限区间同质化方法(LIHM)的配电网电能质量动态有向评价模型。通过分析电能质量数据特点与动态信息集结方式,考虑不同指标的裕度及异质性,对评价数据进行同质化处理,以保证评价信息的完整性与评价的公平性;引入动态评价方法对配电系统电能质量进行动态有向分析,判断待评价节点电能质量的变化趋势,对各节点电能质量做出预警,为进一步的电能质量治理策略提供参考,从而达到全面客观评价电能质量优劣的目的。实际算例分析了含分布式电源的配电系统在不同负荷状态电能质量情况,该评价模型能显著区分各种状态下的电能质量水平,验证了模型在工程应用上的可行性与有效性。
To solve the problem of the heterogeneity and volatility of the data in power quality evaluation, a dynamic and directed power quality evaluation method based on the limited interval homogenization method(LIHM) is proposed. The characteristics of the data and the way of dynamic information aggregation are analyzed, the limit interval of different index and the heterogeneity between the indexes is considered, and the evaluation data are homogenized to ensure the integrity and fairness of the evaluation. The dynamic evaluation method is adopted to analyze the power quality of the distribution system. The trend of power quality of the evaluation point is judged, which is used to provide early warning of the power quality and provide reference for further power quality management strategies, and achieve the purpose of comprehensive and objective evaluation of power quality. A demonstration is given to analyze the power quality of the distribution system in different load conditions. The evaluation model proposed in this paper can distinguish the power quality level in various states,and verify the feasibility and effectiveness of the model.
To solve the problem of the heterogeneity and volatility of the data in power quality evaluation, a dynamic and directed power quality evaluation method based on the limited interval homogenization method(LIHM) is proposed. The characteristics of the data and the way of dynamic information aggregation are analyzed, the limit interval of different index and the heterogeneity between the indexes is considered, and the evaluation data are homogenized to ensure the integrity and fairness of the evaluation. The dynamic evaluation method is adopted to analyze the power quality of the distribution system. The trend of power quality of the evaluation point is judged, which is used to provide early warning of the power quality and provide reference for further power quality management strategies, and achieve the purpose of comprehensive and objective evaluation of power quality. A demonstration is given to analyze the power quality of the distribution system in different load conditions. The evaluation model proposed in this paper can distinguish the power quality level in various states,and verify the feasibility and effectiveness of the model.
引文
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[21] 江辉,张清联,彭建春.基于改进云物元模型的风电场电能质量评价 [J].电网技术,2014,38(1):205-210
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[ 2] 马钊,周孝信,尚宇炜,等.未来配电系统形态及发展趋势 [J].中国电机工程学报,2015,35(6):1289-1298
[ 3] 张丹,王杰.国内微电网项目建设及发展趋势研究 [J].电网技术,2016,40(2):451-458
[ 4] Elbasuony G S,Aleem S H E A,Ibrahim A M,et al.A unified index for power quality evaluation in distributed generation systems [J].Energy,2018,149 :607-622
[ 5] 赵霞,赵成勇,贾秀芳,等.基于可变权重的电能质量模糊综合评价 [J].电网技术,2005,29(6):11-16
[ 6] 刘俊华,罗隆福,张志文,等.一种考虑排序稳定分析的电能质量综合评估新方法 [J].中国电机工程学报,2013,33(1):70-76
[ 7] Morsi W G,EL-Hawary M E.Power quality evaluation in smart grids considering modern distortion in electric power systems [J].Electric Power Systems Research,2011,81(5):1117-1123
[ 8] 沈阳武,彭晓涛,施通勤,等.基于最优组合权重的电能质量灰色综合评价方法 [J].电力系统自动化,2012,36(10):67-73
[ 9] Reddy M V,Sodhi R.A rule-based S-Transform and AdaBoost based approach for power quality assessment [J].Electric Power Systems Research,2016,134:66-79
[10] 李如琦,苏浩益.基于可拓云理论的电能质量综合评估模型 [J].电力系统自动化,2012,36(1):66-70
[11] 董海艳,贾清泉,王宁,等.复杂电能质量关联扰动模式的可拓挖掘方法 [J].中国电机工程学报,2016,36(5):1269-1278
[12] 李玲玲,刘敬杰,凌跃胜,等.物元理论和证据理论相结合的电能质量综合评估 [J].电工技术学报,2015,30(12):383-391
[13] Liu J,Yan S,Cai N.Analysis and evaluation model on the power quality of wind farm [J].Icic Express Letters Part B Applications An International Journal of Research & Surveys,2015,6(1),53-59
[14] 乔鹏程,吴正国,李辉.基于改进雷达图法的电能质量综合评估方法 [J].电力自动化设备,2011,31(6):88-92
[15] 潘旭,王金丽,赵晓龙,等.智能配电网多维数据质量评价方法 [J].中国电机工程学报,2018(5):1375-1384
[16] Vidhya S,Kamaraj V.Complex neural classifiers for power quality data mining [J].Journal of Electrical Engineering & Technology,2018,13(4):1714-1722
[17] 何吉彪,程浩忠.含微网配电网规划中的电能质量综合评估 [J].电网技术,2012,36(8):209-214
[18] 曾正,杨欢,赵荣祥.基于突变决策的分布式发电系统电能质量综合评估 [J].电力系统自动化,2011,35(21):52-77
[19] Chen B,Fang R,Xie S.Comprehensive evaluation of distributed power quality based on improved etropy method[C].In:Proceedings of the 2nd International Conference on Electrical,Control and Automation Engineering,Xiamen,China,2018.82-86
[20] 袁金晶,欧阳森,石怡理,等.基于激励惩罚机制的区域电网电能质量综合评价方法 [J].电力系统自动化,2013,37(7):55-59
[21] 江辉,张清联,彭建春.基于改进云物元模型的风电场电能质量评价 [J].电网技术,2014,38(1):205-210
[22] 李凡长,梅毓,钱旭培.动态模糊数据模型研究 [J].小型微型计算机系统,2002,23(11):1281-1283
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