异步联网下多直流送出系统的功率稳定性分析及评价标准
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摘要
异步联网后的云南电网属于典型的多直流送出系统。由于直流彼此之间存在相互作用,因此如何评估多直流送出系统的稳定性成为了亟待解决的问题。基于两直流送出系统的准稳态模型,研究了多直流送出系统的最大功率传输曲线,基于该功率曲线给出了多直流送出系统功率稳定裕度的评估指标。进一步地,研究了多直流送出系统的功率稳定性与多直流有效短路比的定量关系,揭示了多直流送出系统功率稳定性与直流相互作用因子的关系,最后给出了多直流送出系统稳定运行的评价标准。分析结果表明,多直流有效短路比<1.2时,多直流送出系统难以稳定运行;多直流有效短路比>2.0时,直流系统通常可以保持较高的功率稳定裕度,相关结论为多直流送出系统的规划运行提供了一定的参考价值。
Asynchronously interconnected Yunnan power grid belongs to a typical multi-send HVDC system. Due to the interactions of each other, how to evaluate the stability of a multi-send HVDC system becomes an urgent problem to be solved. Based on the two-send HVDC systems quasi-steady state model, we studied the maximum available power curve of the multi-send HVDC system. Based on the power curve, an evaluation index of power stability margin of multi-DC transmission system is given. Furthermore, we studied the correlations between the power stability of the multi-send HVDC systems and the effective short circuit ratio, revealed the relations between the power stability of the multi-send HVDC systems and the influence factor, and put forward an evaluation criterion for stable operation of the multi-send HVDC systems. The analyses show that the sending HVDC systems are hard to maintain stable operation when their MIESCRs are less than 1.2 and the sending HVDC systems can maintain high power stability margin when their MIESCRs are greater than 2.0. The corresponding conclusions provide a useful instruction for planning and operation of the multi-send HVDC systems.
Asynchronously interconnected Yunnan power grid belongs to a typical multi-send HVDC system. Due to the interactions of each other, how to evaluate the stability of a multi-send HVDC system becomes an urgent problem to be solved. Based on the two-send HVDC systems quasi-steady state model, we studied the maximum available power curve of the multi-send HVDC system. Based on the power curve, an evaluation index of power stability margin of multi-DC transmission system is given. Furthermore, we studied the correlations between the power stability of the multi-send HVDC systems and the effective short circuit ratio, revealed the relations between the power stability of the multi-send HVDC systems and the influence factor, and put forward an evaluation criterion for stable operation of the multi-send HVDC systems. The analyses show that the sending HVDC systems are hard to maintain stable operation when their MIESCRs are less than 1.2 and the sending HVDC systems can maintain high power stability margin when their MIESCRs are greater than 2.0. The corresponding conclusions provide a useful instruction for planning and operation of the multi-send HVDC systems.
引文
[1]张建新,刘春晓,陈亦平,等.异步联网方式下云南电网超低频振荡的抑制措施与试验[J].南方电网技术,2016,10(7):35-39.ZHANG Jianxin,LIU Chunxiao,CHEN Yiping,et al.Countermeasures and experiments on ultra low frequency oscillation of Yunnan power grid in asynchronous interconnection mode[J].Southern Power System Technology,2016,10(7):35-39.
[2]付超,柳勇军,涂亮,等.云南电网与南方电网主网异步联网系统试验分析[J].南方电网技术,2016,10(7):1-5.FU Chao,LIU Yongjun,TU Liang,et al.Experiment and analysis on asynchronously interconnected system of Yunnan power grid and main grid of China Southern power grid[J].Southern Power System Technology,2016,10(7):1-5.
[3]陈虎,贺洋,张英敏,等.四川电网多送出直流输电系统交互影响分析[J].电力系统及其自动化学报,2011,23(4):21-26.CHEN Hu,HE Yang,ZHANG Yingmin,et al.Interaction analysis of multi-send HVDC systems of Sichuan power grid[J].Proceedings of the CSU-EPSA,2011,23(4):21-26.
[4]陈树勇,逄博,陈得治,等.新疆电网多送出直流输电系统运行特性分析[J].中国电力,2014,47(4):102-107.CHEN Shuyong,PANG Bo,CHEN Dezhi,et al.Analysis on operating characteristics of the multi-send HVDC system in Xinjiang power grid[J].Electric Power,2014,47(4):102-107.
[5]屠竞哲,张健,吴萍,等.多直流送出系统送端故障引发稳定破坏机理分析[J].电力系统自动化,2015,39(20):146-151.TU Jingzhe,ZHANG Jian,WU Ping,et al.Mechanism analysis on instability caused by sending-side contingencies of multiple HVDCsending systems[J].Automation of Electric Power Systems,2015,39(20):146-151.
[6]董桓锋,徐政,钱迎春,等.交直流同步电网异步分隔的一般性原则[J].高电压技术,2017,43(7):2167-2174.DONG Huanfeng,XU Zheng,QIAN Yingchun,et al.General principle of asynchronous segment for AC/DC synchronous power systems[J].High Voltage Engineering,2017,43(7):2167-2174.
[7]陈虎,张英敏,贺洋,等.多馈入直流输电系统功率稳定性分析[J].电网技术,2011,35(6):50-54.CHEN Hu,ZHANG Yingmin,HE Yang,et al.Analysis on power stability of multi-infeed HVDC power transmission system[J].Power System Technology,2011,35(6):50-54.
[8]黄弘扬,徐政,许烽.多馈入直流输电系统短路比指标的有效性分析[J].电力自动化设备,2012,32(11):46-50.HUANG Hongyang,XU Zheng,XU Feng.Effectiveness of short circuit ratio index for multi-infeed HVDC system[J].Electric Power Automation Equipment,2012,32(11):46-50.
[9]CIGRE Working Group B4.41.Systems with multiple DC infeed[R].Paris,France:CIGRE,2008.
[10]CIGRE Working Group 14.05.On voltage and power stability in AC/DC systems[R].Paris,France:CIGRE,2003.
[11]AIK D L H,ANDERSSON G.Analysis of voltage and power interactions in multi-infeed HVDC systems[J].IEEE Transactions on Power Delivery,2013,28(2):816-824.
[12]LEE D H A,ANDERSSON G.An equivalent single-infeed model of multi-infeed HVDC systems for voltage and power stability analysis[J].IEEE Transactions on Power Delivery,2016,31(1):303-312.
[13]黄弘扬.交直流电力系统暂态稳定分析与控制问题研究[D].杭州:浙江大学,2014:55-63.HUANG Hongyang.AC/DC power system transient stability analysis and control[D].Hangzhou,China:Zhejiang University,2014:55-63.
[14]管霖,陈兴望,雷晟,等.多馈入短路比指标的适用范围及其与直流最大传输功率的关系探讨[J].电网技术,2017,41(3):691-697.GUAN Lin,CHEN Xingwang,LEI Sheng,et al.Study on applicability of multi-infeed short circuit ratio and its relationship with maximum HVDC available power[J].Power System Technology,2017,41(3):691-697.
[15]张健,屠竞哲,印永华,等.直流送受端故障对送端系统稳定性影响的对比分析及控制措施[J].电网技术,2016,40(4):999-1004.ZHANG Jian,TU Jingzhe,YIN Yonghua,et al.Comparison analysis and countermeasures on impact of HVDC sending-side and receiving-side contingencies on sending-side system stability[J].Power System Technology,2016,40(4):999-1004.
[16]饶宏,洪潮,周保荣,等.乌东德特高压多端直流工程受端采用柔性直流对多直流集中馈入问题的改善作用研究[J].南方电网技术,2017,11(3):1-5.RAO Hong,HONG Chao,ZHOU Baorong,et al.Study on improvement of VSC-HVDC at inverter side of Wudongde multi-terminal UHVDC for the problem of centralized multi-infeed HVDC[J].Southern Power System Technology,2017,11(3):1-5.
[17]徐政.交直流电力系统动态行为分析[M].北京:机械工业出版社,2004:62-65.XU Zheng.Dynamic performance analysis of AC/DC power systems[M].Beijing,China:China Machine Press,2004:62-65.
[18]周煜智,徐政.描述直流孤岛送电系统的3个指标[J].高电压技术,2017,43(1):82-88.ZHOU Yuzhi,XU Zheng.Three indexes for describing DC island sending systems[J].High Voltage Engineering,2017,43(1):82-88.
[19]邵瑶,汤涌.多馈入直流系统交互作用因子的影响因素分析[J].电网技术,2013,37(3):794-799.SHAO Yao,TANG Yong.Analysis of influencing factors of multi-infeed HVDC system interaction factor[J].Power System Technology,2013,37(3):794-799.
[2]付超,柳勇军,涂亮,等.云南电网与南方电网主网异步联网系统试验分析[J].南方电网技术,2016,10(7):1-5.FU Chao,LIU Yongjun,TU Liang,et al.Experiment and analysis on asynchronously interconnected system of Yunnan power grid and main grid of China Southern power grid[J].Southern Power System Technology,2016,10(7):1-5.
[3]陈虎,贺洋,张英敏,等.四川电网多送出直流输电系统交互影响分析[J].电力系统及其自动化学报,2011,23(4):21-26.CHEN Hu,HE Yang,ZHANG Yingmin,et al.Interaction analysis of multi-send HVDC systems of Sichuan power grid[J].Proceedings of the CSU-EPSA,2011,23(4):21-26.
[4]陈树勇,逄博,陈得治,等.新疆电网多送出直流输电系统运行特性分析[J].中国电力,2014,47(4):102-107.CHEN Shuyong,PANG Bo,CHEN Dezhi,et al.Analysis on operating characteristics of the multi-send HVDC system in Xinjiang power grid[J].Electric Power,2014,47(4):102-107.
[5]屠竞哲,张健,吴萍,等.多直流送出系统送端故障引发稳定破坏机理分析[J].电力系统自动化,2015,39(20):146-151.TU Jingzhe,ZHANG Jian,WU Ping,et al.Mechanism analysis on instability caused by sending-side contingencies of multiple HVDCsending systems[J].Automation of Electric Power Systems,2015,39(20):146-151.
[6]董桓锋,徐政,钱迎春,等.交直流同步电网异步分隔的一般性原则[J].高电压技术,2017,43(7):2167-2174.DONG Huanfeng,XU Zheng,QIAN Yingchun,et al.General principle of asynchronous segment for AC/DC synchronous power systems[J].High Voltage Engineering,2017,43(7):2167-2174.
[7]陈虎,张英敏,贺洋,等.多馈入直流输电系统功率稳定性分析[J].电网技术,2011,35(6):50-54.CHEN Hu,ZHANG Yingmin,HE Yang,et al.Analysis on power stability of multi-infeed HVDC power transmission system[J].Power System Technology,2011,35(6):50-54.
[8]黄弘扬,徐政,许烽.多馈入直流输电系统短路比指标的有效性分析[J].电力自动化设备,2012,32(11):46-50.HUANG Hongyang,XU Zheng,XU Feng.Effectiveness of short circuit ratio index for multi-infeed HVDC system[J].Electric Power Automation Equipment,2012,32(11):46-50.
[9]CIGRE Working Group B4.41.Systems with multiple DC infeed[R].Paris,France:CIGRE,2008.
[10]CIGRE Working Group 14.05.On voltage and power stability in AC/DC systems[R].Paris,France:CIGRE,2003.
[11]AIK D L H,ANDERSSON G.Analysis of voltage and power interactions in multi-infeed HVDC systems[J].IEEE Transactions on Power Delivery,2013,28(2):816-824.
[12]LEE D H A,ANDERSSON G.An equivalent single-infeed model of multi-infeed HVDC systems for voltage and power stability analysis[J].IEEE Transactions on Power Delivery,2016,31(1):303-312.
[13]黄弘扬.交直流电力系统暂态稳定分析与控制问题研究[D].杭州:浙江大学,2014:55-63.HUANG Hongyang.AC/DC power system transient stability analysis and control[D].Hangzhou,China:Zhejiang University,2014:55-63.
[14]管霖,陈兴望,雷晟,等.多馈入短路比指标的适用范围及其与直流最大传输功率的关系探讨[J].电网技术,2017,41(3):691-697.GUAN Lin,CHEN Xingwang,LEI Sheng,et al.Study on applicability of multi-infeed short circuit ratio and its relationship with maximum HVDC available power[J].Power System Technology,2017,41(3):691-697.
[15]张健,屠竞哲,印永华,等.直流送受端故障对送端系统稳定性影响的对比分析及控制措施[J].电网技术,2016,40(4):999-1004.ZHANG Jian,TU Jingzhe,YIN Yonghua,et al.Comparison analysis and countermeasures on impact of HVDC sending-side and receiving-side contingencies on sending-side system stability[J].Power System Technology,2016,40(4):999-1004.
[16]饶宏,洪潮,周保荣,等.乌东德特高压多端直流工程受端采用柔性直流对多直流集中馈入问题的改善作用研究[J].南方电网技术,2017,11(3):1-5.RAO Hong,HONG Chao,ZHOU Baorong,et al.Study on improvement of VSC-HVDC at inverter side of Wudongde multi-terminal UHVDC for the problem of centralized multi-infeed HVDC[J].Southern Power System Technology,2017,11(3):1-5.
[17]徐政.交直流电力系统动态行为分析[M].北京:机械工业出版社,2004:62-65.XU Zheng.Dynamic performance analysis of AC/DC power systems[M].Beijing,China:China Machine Press,2004:62-65.
[18]周煜智,徐政.描述直流孤岛送电系统的3个指标[J].高电压技术,2017,43(1):82-88.ZHOU Yuzhi,XU Zheng.Three indexes for describing DC island sending systems[J].High Voltage Engineering,2017,43(1):82-88.
[19]邵瑶,汤涌.多馈入直流系统交互作用因子的影响因素分析[J].电网技术,2013,37(3):794-799.SHAO Yao,TANG Yong.Analysis of influencing factors of multi-infeed HVDC system interaction factor[J].Power System Technology,2013,37(3):794-799.