采用SSFCL耦合的主动配电系统合环方法研究
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摘要
为了应对配电网层面高渗透率分布式能源大规模接入后的合环运行问题,文章研究了采用固态限流器(SSFCL)耦合的主动配电网合环方法。通过SSFCL直流电感瞬时插入实现故障限流,提高分布式发电接入点残压便于实现低电压穿越,同时可以限制配电网合环冲击电流,并具有一定的潮流控制能力。通过对采用SSFCL耦合的主动配电系统合环运行的稳态特性和故障暂态特性进行仿真,验证了该方法具有成本低、可靠性高的优点,有利于传统配电网向主动配电网平稳过渡。
In order to deal with the close-ring operation of large-scale integration of high penetration distributed generation in distribution network,a closed-ring topology of the network structure is used as a promising solution.The fault current limit can be realized by the transient inductance of SSFCL DC inductor,and the residual voltage of distributed generation access point can be improved to realize low voltage ride through.Meanwhile,it can limit the inrush surge of the distribution network and has certain power flow control capability.The simulation results show that the proposed method has the advantages of low cost and high reliability,and is beneficial for smooth transition from the traditional distribution network to active distribution network.
In order to deal with the close-ring operation of large-scale integration of high penetration distributed generation in distribution network,a closed-ring topology of the network structure is used as a promising solution.The fault current limit can be realized by the transient inductance of SSFCL DC inductor,and the residual voltage of distributed generation access point can be improved to realize low voltage ride through.Meanwhile,it can limit the inrush surge of the distribution network and has certain power flow control capability.The simulation results show that the proposed method has the advantages of low cost and high reliability,and is beneficial for smooth transition from the traditional distribution network to active distribution network.
引文
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[2]赵贺,李明忆,井天军.光伏分布式发电接入方式分析及其对配电网运行的影响[J].供用电,2013,30(5):17-20.ZHAO He,LI Mingyi,JING Tianjun.Analysis on integrade mode of photovoltaic dispersed generation into distribution network and influence on the operation[J].Distribution&Utilization,2013,30(5):17-20.
[3]刘东.主动配电网的国内技术进展[J].供用电,2014,31(1):28-29.LIU Dong.The domestic technical development of active distribution network[J].Distribution&Utilization,2014,31(1):28-29.
[4]SAMUELSSON O,REPO S,JESSLER R,et al.Active distribution network—Demonstration project ADINE[C]//Innovative Smart Grid Technologies Conference Europe(ISGT Europe),2010 IEEE PES,2010:1-8.
[5]尤毅,刘东,于文鹏,等.主动配电网技术及其进展[J].电力系统自动化,2012,36(18):10-16.YOU Yi,LIU Dong,YU Wenpeng,et al.Technology and its trends of active distribution network[J].Automation of Electric Power Systems,2012,36(18):10-16.
[6]范明天,张祖平,苏傲雪,等.主动配电系统可行技术的研究[J].中国电机工程学报,2013,36(22):12-18.FAN Mingtian,ZHANG Zuping,SU Aoxue,et al.Enabling technologies for active distribution systems[J].Proceedings of the CSEE,2013,36(22):12-18.
[7]BUCHHOLZ B,HUEBEL I,POVH D,et al.Mediumvoltage direct-current(MVDC)coupling in the liberalized market[C]//CIGRE Session,2002:14-203.
[8]BUCHHOLZ B M.Power quality improvement through generation and power exchange on distribution level[C]//17th International Conference on Electricity Distribution,2003:1-4.
[9]BUCHHOLZ B,SCHWAEGERL C,STEPHANBLOME T,et al.Advanced planning and operation of dispersed generation ensuring power quality,security and efficiency in distribution systems[C]//Beitrag CIGRE-Konferenz Paris,2004.
[10]蔡永华.固态限流器的研制[D].杭州:浙江大学,2004.
[11]江道灼,陈永刚,李电,等.变压器耦合固态限流器的纯电容负载试验[J].电力系统自动化,2006,30(17):65-69.JIANG Daozhuo,CHEN Yonggang,LI Dian,et al.Experimental study of transformer coupling solid state fault current limiter with capacitance load[J].Automation of Electric Power System,2006,30(17):65-69.
[12]莫育杰,江道灼,田中山,等.新型固态限流器中饱和型耦合变压器的设计[J].电力系统自动化,2012,36(17):103-108.MO Yujie,JIANG Daozhuo,TIAN Zhongshan,et al.Design of saturated coupling transformer in a new bridgetype solid state fault current limiter[J].Automation of Electric Power Systems,2012,36(17):103-108.