用于直流换流站动态无功补偿的调相机与SVC运行特性对比
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摘要
调相机和静止无功补偿器(SVC)均可为换流站提供无功支撑,但两者产生无功的机理并不相同。以直流送端系统电压波动为例,研究两种设备的动态无功补偿特性及其对交直流输电系统电压的支撑作用;对比分析了系统电压突降和突增时,调相机和SVC的无功调节能力;在此基础上,对比分析了两种无功补偿设备对动态过程中系统传输功率的影响。结果表明:交流系统电压突降后,调相机具有更好的无功输出特性和电压调节能力;受无功吸收能力的限制,交流系统电压突升后,调相机和SVC均不能使得系统电压恢复到额定值。
The synchronous condenser and the static var compensator( SVC) can provide reactive support for the converter station,but their dynamic reactive power responses are different because of the different principles. Taking the voltage fluctuation of the DC sending-end system as an example,this paper studied the ability of the reactive power response of two compensation devices and compared their support for transmission power of AC/DC system. Then the reactive power regulation abilities of synchronous condenser and SVC were analyzed and compared when voltage dip and swell occurred. On the basis of which,this paper studied the influence of two reactive compensation devices on the transmission power of AC/DC system during dynamic process. The results show that the synchronous condenser has better reactive output characteristics and voltage regulation ability when AC system voltage sags; because of limited reactive absorbing ability,both synchronous condenser and SVC cannot adjust the voltage to rated value when AC system voltage swells.
The synchronous condenser and the static var compensator( SVC) can provide reactive support for the converter station,but their dynamic reactive power responses are different because of the different principles. Taking the voltage fluctuation of the DC sending-end system as an example,this paper studied the ability of the reactive power response of two compensation devices and compared their support for transmission power of AC/DC system. Then the reactive power regulation abilities of synchronous condenser and SVC were analyzed and compared when voltage dip and swell occurred. On the basis of which,this paper studied the influence of two reactive compensation devices on the transmission power of AC/DC system during dynamic process. The results show that the synchronous condenser has better reactive output characteristics and voltage regulation ability when AC system voltage sags; because of limited reactive absorbing ability,both synchronous condenser and SVC cannot adjust the voltage to rated value when AC system voltage swells.
引文
[1]刘振亚,张启平,王雅婷,等.提高西北新甘青750kV送端电网安全稳定水平的无功补偿措施研究[J].中国电机工程学报,2015,35(5):1015-1022.LIU Zhenya,ZHANG Qiping,WANG Yating,et al.Research on reactive compensation strategies for improving stability level of sending-end of 750 k V grid in northwest China[J]. Proceedings of the CSEE,2015,35(5):1015-1022.
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[8]付伟,刘天琪,李兴源,等.静止无功补偿器运行特性分析和控制方法综述[J].电力系统保护与控制,2014,42(22):147-154.FU Wei,LIU Tianqi,LI Xingyuan,et al. Analysis of operating characteristic and survey of control methods used in static var compensator[J]. Power System Protection and Control,2014,42(22):147-154.
[9]雷邦军,费树岷,翟军勇,等.静止无功补偿器(SVC)的一种新型非线性鲁棒自适应控制设计方法[J].中国电机工程学报,2013,33(30):65-70.LEI Bangjun,FEI Shumin,ZHAI Junyong,et al. A Novel Improved Nonlinear Robust Adaptive Control Design Method of SVC[J]. Proceedings of the CSEE,2013,33(30):65-70.
[10]张超. SVC响应时间及其对电压稳定性影响分析[D].吉林:东北电力大学,2011.ZHANG Chao. The study on SVC response time and its impact on voltage stability[D]. Jilin:Northeast Dianli University,2011.
[11]谢惠藩,王海军,张楠,等. SVC在南方电网西电东送中的应用研究[J].南方电网技术,2010,04(s1):138-142.XIE Huifan,WANG Haijun,ZHANG Nan,et al. Study on the application of SVC to power transmitted from west to east in China southern power grid[J]. Southern Power System Technology,2010,4(s1):138-142.
[12]王杰,阮映琴,傅乐,等.计及动态负荷的电力系统静止无功补偿器(SVC)与发电机励磁控制[J].中国电机工程学报,2004,24(6):24-29.WANG Jie,RUAN Yingqin,FU Le,et al. The nonlinear control of SVC and excitation of generators in power systems with dynamic loads[J]. Proceedings of the CSEE,2004,24(6):24-29.
[13]陶骞,王庆,阮羚,等.特高压直流工程大型调相机组启动调试及关键技术[J].中国电力,2017,5(12):51-56.TAO Qian,WANG Qing,RUAN Ling,et al. Contents and key technical problems in start-up and commissioning of large-scale synchronous condenser in UHVDC Project[J]. Electric Power,2017,5(12):51-56.
[14]张开宇,崔勇,庄侃沁,等.加装同步调相机对多直流馈入受端电网的影响分析[J].电力系统保护与控制,2017,45(22):139-143.ZHANG Kaiyu,CUI Yong,ZHUANG Kanqin,et al. Analysis of the influence of synchronous condensers on receiving-end grid with multi-infeed HVDC[J]. Power System Protection and Control,2017,45(22):139-143.
[2]华文,徐政,丁理杰.特高压直流输电对四川电网的影响[J].华东电力,2011,(12):2007-2011.HUA Wen,XU Zheng,DING Lijie. Impacts of UHVDC transmission on sichuan power grid[J]. East China Electric Power,2011,(12):2007-2011.
[3]饶宏,张东辉,赵晓斌,等.特高压直流输电的实践和分析[J].高电压技术,2015,41(8):2481-2488.RAO Hong,ZHANG Donghui,ZHAO Xiaobin,et al.Practice and analyses of UHVDC power transmission[J]. High Voltage Engineering,2015,41(8):2481-2488.
[4]蔡恒,刘东兴,刘崇茹,等.特高压直流输电接入江西电网动态电压稳定分析[J].现代电力,2011,(6):17-22.CAI Heng,LIU Dongxing,LIU Chongru,et al. Dynamic voltage stability analysis on UHVDC accessing to Jiangxi power grid[J]. Modern Electric Power,2011,(6):17-22.
[5]齐旭,曾德文,史大军,等.特高压直流输电对系统安全稳定影响研究[J].电网技术,2006,30(2):1-6.QI Xu,ZENG Dewen,SHI Dajun,et al. Study on impacts of UHVDC transmission on power system stability[J]. Power System Technology,2006,30(2):1-6.
[6]王雅婷,张一驰,周勤勇,等.新一代大容量调相机在电网中的应用研究[J].电网技术,2017,41(1):22-28.WANG Yating,ZHANG Yichi,ZHOU Qinyong,et al.Study on application of new generation large capacity synchronous condenser in power grid[J]. Power System Technology,2017,41(1):22-28.
[7]汪一.应用于特高压直流输电的同步调相机控制系统研究[D].北京:华北电力大学,2017.WANG Yi. Research on synchronous condenser control system for UHVDC transmission[D]. Beijing:North China Electric Power University,2017.
[8]付伟,刘天琪,李兴源,等.静止无功补偿器运行特性分析和控制方法综述[J].电力系统保护与控制,2014,42(22):147-154.FU Wei,LIU Tianqi,LI Xingyuan,et al. Analysis of operating characteristic and survey of control methods used in static var compensator[J]. Power System Protection and Control,2014,42(22):147-154.
[9]雷邦军,费树岷,翟军勇,等.静止无功补偿器(SVC)的一种新型非线性鲁棒自适应控制设计方法[J].中国电机工程学报,2013,33(30):65-70.LEI Bangjun,FEI Shumin,ZHAI Junyong,et al. A Novel Improved Nonlinear Robust Adaptive Control Design Method of SVC[J]. Proceedings of the CSEE,2013,33(30):65-70.
[10]张超. SVC响应时间及其对电压稳定性影响分析[D].吉林:东北电力大学,2011.ZHANG Chao. The study on SVC response time and its impact on voltage stability[D]. Jilin:Northeast Dianli University,2011.
[11]谢惠藩,王海军,张楠,等. SVC在南方电网西电东送中的应用研究[J].南方电网技术,2010,04(s1):138-142.XIE Huifan,WANG Haijun,ZHANG Nan,et al. Study on the application of SVC to power transmitted from west to east in China southern power grid[J]. Southern Power System Technology,2010,4(s1):138-142.
[12]王杰,阮映琴,傅乐,等.计及动态负荷的电力系统静止无功补偿器(SVC)与发电机励磁控制[J].中国电机工程学报,2004,24(6):24-29.WANG Jie,RUAN Yingqin,FU Le,et al. The nonlinear control of SVC and excitation of generators in power systems with dynamic loads[J]. Proceedings of the CSEE,2004,24(6):24-29.
[13]陶骞,王庆,阮羚,等.特高压直流工程大型调相机组启动调试及关键技术[J].中国电力,2017,5(12):51-56.TAO Qian,WANG Qing,RUAN Ling,et al. Contents and key technical problems in start-up and commissioning of large-scale synchronous condenser in UHVDC Project[J]. Electric Power,2017,5(12):51-56.
[14]张开宇,崔勇,庄侃沁,等.加装同步调相机对多直流馈入受端电网的影响分析[J].电力系统保护与控制,2017,45(22):139-143.ZHANG Kaiyu,CUI Yong,ZHUANG Kanqin,et al. Analysis of the influence of synchronous condensers on receiving-end grid with multi-infeed HVDC[J]. Power System Protection and Control,2017,45(22):139-143.