计及负荷重要程度的含DG配电网可靠性评估
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摘要
受DG出力和负荷波动性的影响,当孤岛内供电不足时,应根据负荷重要程度进行负荷削减。针对现有的负荷等级划分方法没有对负荷重要程度进行量化,难以对同级负荷进行比较的问题,本文提出了一种负荷重要程度的综合评估方法,并在此基础上进行含DG配电网可靠性评估。首先,建立了衡量负荷重要程度的指标体系;然后通过改进序关系分析法,采用主客观相结合的方式确定各指标的权重,并计算负荷的重要程度综合评估值,量化负荷的重要程度;最后,进行计及负荷重要程度的含DG配电网可靠性评估。以IEEE-RBTS仿真系统为例,说明了本文方法的有效性和实用性。
Due to the influence of DG output and load fluctuation,the load shall be cut down in accordance with load importance degree in case of insufficient power supply of isolated island. As for the such problem of existing load level classification method as no load importance quantification and difficult comparison of same level load, in this paper, a kind of comprehensive evaluation method of load importance degree is proposed and, on this basis, reliability evaluation of distribution grid with DG consideration is performed.Firstly, the index system for measuring load importance degree is established,then the weight of each index is defined by the subjective and objective combination method is adopted, the comprehensive evaluation value of the load importance is calculated and the importance degree of the load is quantized by way of improved rank correlation analysis method. Finally, the reliability evaluation of distribution network with DG considering load importance degree is taken into account. Both effectiveness and practicability of the method is described with IEEE-RBTS simulation system as an example.
Due to the influence of DG output and load fluctuation,the load shall be cut down in accordance with load importance degree in case of insufficient power supply of isolated island. As for the such problem of existing load level classification method as no load importance quantification and difficult comparison of same level load, in this paper, a kind of comprehensive evaluation method of load importance degree is proposed and, on this basis, reliability evaluation of distribution grid with DG consideration is performed.Firstly, the index system for measuring load importance degree is established,then the weight of each index is defined by the subjective and objective combination method is adopted, the comprehensive evaluation value of the load importance is calculated and the importance degree of the load is quantized by way of improved rank correlation analysis method. Finally, the reliability evaluation of distribution network with DG considering load importance degree is taken into account. Both effectiveness and practicability of the method is described with IEEE-RBTS simulation system as an example.
引文
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[9]王雨婷,张筱慧,唐巍,等.考虑光伏及负荷时变性的配电网故障恢复[J].电网技术,2016,40(9):2706-2716.WANG Yuting, ZHANG Xiaohui, TANG Wei, et al. Fault recovery of distribution network considering time variation of photovoltaic and load[J]. Power System Technology,2016,40(9):2706-2716.
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[13]康田园.大型城市电网负荷特性研究[D].郑州:郑州大学,2015.
[14]霍成军.电力系统负荷特性分析研究[D].天津:天津大学,2007.
[15]王成山,罗凤章.配电系统综合评价理论与方法[M].北京:科学出版社,2012.
[16]芦晶晶,赵渊,赵勇帅,等.含分布式电源配电网可靠性评估的点估计法[J].电网技术,2013,37(8):2250-2257.LU Jingjing, ZHAO Yuan, ZHAO Yongshuai,et al. A point estimation method for reliability evaluation of distribution network with distributed generation[J]. Power System Tech-nology,2013,37(8):2250-2257.
[17]IEEE Committee Report. IEEE reliability test system[R].IEEE Transactions on Power Apparatus and Systems, 1979:2047-2054.
[18]徐玉琴,吴颖超.考虑风力发电影响的配电网可靠性评估[J].电网技术,2011,35(4):154-158.XU Yuqin, WU Yingchao. Reliability evaluation for distrihution system connected with wind-turbine generators[J]. Power System Technology,2011,35(4):154-158.
[2]罗欢,周步祥,王小红,等.计及负荷分级与孤岛运行的配电网供电恢复策略[J].电测与仪表,2015(13):116-123.LUO Huan, ZHOU Buxiang, WANG Xiaohong, et al. Service restoration of distribution grid with load classificationand isolated island operation[J]. Electrical Measurement&Instrumentation, 2015(13):116-123.
[3]刘伟佳,孙磊,林振智,等.含间歇电源、储能和电动汽车的配电孤岛短时恢复供电策略[J].电力系统自动化,2015,39(16):49-58.LIU Weijia,SUN Lei, LIN Zhenzhi,et al. Short period restoration strategy in isolated electrical islands with intermittent energy sources, energy storage systems and electric vehicles[J]. Automation of Electric Power Systems, 2015,39(16):49-58.
[4]彭寒梅,曹一家,黄小庆,等.基于时变通用生成函数的孤岛运行模式下微电网可靠性评估[J].电力系统自动化,2015,39(10):28-35.PENG Hanmei, CAO Yijia, HUANG Xiaoqing, et al. Reliability evaluation of microgrid in islanded operation mode based on TVUGF[J]. Automation of Electric Power Systems, 2015,39(10):28-35.
[5]王昌照,汪隆君,王钢,等.分布式电源出力与负荷相关性对配电网可靠性的影响分析[J].电力自动化设备,2015,35(6):99-105.WANG Changzhao, WANG Longjun, WANG Gang, et al.Impact of distributed Generation output and load correlation on distribution network reliability[J]. Electric Power Automation Equipment,2015,35(6):99-105.
[6]陈璨,吴文传,张伯明,等.基于多场景技术的有源配电网可靠性评估[J].中国电机工程学报,2012,32(34):67-73.CHEN Can, WU Wenchuan, ZHANG Baiming,et al. An active distribution system reliability evaluation method based on multiple scenarios technique[J]. Proceedings of the CSEE,2012,32(34):67-73.
[7]程寅,周步祥,林楠,等.考虑负荷管理影响的配电网孤岛划分方法[J].电力系统及其自动化学报,2012,24(3):101-106.CHENG Yin, ZHOU Buxiang, LIN Nan, et al. Islanding method in distribution networks with the consideration of load management[J]. Proceedings of the CSU-EPSA, 2012,24(3):101-106.
[8]王海燕,同向前.基于剩余电量评估的微电网切负荷策略研究[J].西安理工大学学报,2015,31(4):428-433.WANG Haiyan, TONG Xiangqian. A study of load shedding strategy of microgrid based on surplus energy evaluation[J]. Journal of Xi'an University of Technology, 2015,31(4):428-433.
[9]王雨婷,张筱慧,唐巍,等.考虑光伏及负荷时变性的配电网故障恢复[J].电网技术,2016,40(9):2706-2716.WANG Yuting, ZHANG Xiaohui, TANG Wei, et al. Fault recovery of distribution network considering time variation of photovoltaic and load[J]. Power System Technology,2016,40(9):2706-2716.
[10]供配电系统设计规范:GB 50052—2009[S]. 2009.Code for design electric power supply systems:GB 50052-2009[S]. 2009.
[11]陈陌,郭亚军,于振明.改进型序关系分析法及其应用[J].系统管理学报,2011,20(3):352-355.CHEN Bai,GUO Yajun, YU Zhenming. An improved method for rank correlation analysis and its application[J]. Journal of Systems&Management, 2011,20(3):352-355.
[12]李萌.中长期电力负荷特性分析和预测方法研究[D].上海:上海交通大学,2014.
[13]康田园.大型城市电网负荷特性研究[D].郑州:郑州大学,2015.
[14]霍成军.电力系统负荷特性分析研究[D].天津:天津大学,2007.
[15]王成山,罗凤章.配电系统综合评价理论与方法[M].北京:科学出版社,2012.
[16]芦晶晶,赵渊,赵勇帅,等.含分布式电源配电网可靠性评估的点估计法[J].电网技术,2013,37(8):2250-2257.LU Jingjing, ZHAO Yuan, ZHAO Yongshuai,et al. A point estimation method for reliability evaluation of distribution network with distributed generation[J]. Power System Tech-nology,2013,37(8):2250-2257.
[17]IEEE Committee Report. IEEE reliability test system[R].IEEE Transactions on Power Apparatus and Systems, 1979:2047-2054.
[18]徐玉琴,吴颖超.考虑风力发电影响的配电网可靠性评估[J].电网技术,2011,35(4):154-158.XU Yuqin, WU Yingchao. Reliability evaluation for distrihution system connected with wind-turbine generators[J]. Power System Technology,2011,35(4):154-158.