适应城市电网的多端柔性直流输电可行性分析及仿真研究
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摘要
城市电网规模庞大复杂且核心城区负荷密度急剧攀升,为提升城市电网电力输送能力,基于城市电网中长期负荷增长模式与预测技术,从电压等级选择、城市电网供电方式分析及交直流输电方式比较等综合分析城市电网多端柔性直流输电的可行性。通过比较多端柔性直流输电与传统交流输电在城市电网供电应用上的利弊,提出适应于城市电网的交直流协调控制策略,研究多端柔性直流输电系统的优化运行。最后以南京电网为例,进行南京电网交直流混合系统建模和多端柔性直流输电仿真,研究多端柔性直流输电与城市电网的交互影响,提出适应典型城市电网多端柔性直流输电的应用构想。
The size of urban grid is huge and complicated, and the load density has risen sharply. To improve the transmission capacity of urban grid, the high-voltage direct current(HVDC) transmission feasibility is analyzed from the aspects of voltage level, power supply method and the comparison of AC and DC power supply mode based on urban grid load growth model and forecasting technology. AC/DC coordinated control strategy and the optimized operation of multi-terminal flexible HVDC transmission are studied through comparing the pros and cons between multi-terminal flexible HVDC transmission and traditional AC transmission grid. The AC/DC hybrid system is modeled and the multi-terminal flexible HVDC transmission is simulated taking Nanjing grid for example. The interaction effects between multi-terminal flexible HVDC transmission and urban gird is studied to put forward a typical city adapted multiterminal flexible HVDC transmission.
The size of urban grid is huge and complicated, and the load density has risen sharply. To improve the transmission capacity of urban grid, the high-voltage direct current(HVDC) transmission feasibility is analyzed from the aspects of voltage level, power supply method and the comparison of AC and DC power supply mode based on urban grid load growth model and forecasting technology. AC/DC coordinated control strategy and the optimized operation of multi-terminal flexible HVDC transmission are studied through comparing the pros and cons between multi-terminal flexible HVDC transmission and traditional AC transmission grid. The AC/DC hybrid system is modeled and the multi-terminal flexible HVDC transmission is simulated taking Nanjing grid for example. The interaction effects between multi-terminal flexible HVDC transmission and urban gird is studied to put forward a typical city adapted multiterminal flexible HVDC transmission.
引文
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[17]吴金龙,刘欣和,王先为,等.多端柔性直流输电系统直流电压混合控制策略[J].电网技术,2015,39(6):1593-1599.Wu Jinlong,Liu Xinhe,Wang Xianwei,et al.Research of DCvoltage hybrid control strategy for VSC-MTDC system[J].Power System Technology,2015,39(6):1593-1599(in Chinese).
[18]杨福,梁军,牛庆达.一种适用于交直流互联系统电磁暂态仿真的动态等效方法[J].电力系统保护与控制,2012,40(16):70-76.Yang Fu,Liang Jun,Niu Qingda.A dynamic equivalent method for electromagnetic transient simulation of AC/DCinterconnected power system[J].Power System Protection and Control,2012,40(16):70-76(in Chinese).
[19]郭启伟,赵建国,牛林,等.银东±660 kV直流系统故障的动态特性仿真研究[J].电力系统保护与控制,2012,40(11):133-139.Guo Qiwei,Zhao Jianguo,Niu Lin,et al.Fault simulation of dynamic characteristics about±660 kV Yindong HVDCsystem[J].Power System Protection and Control,2012,40(11):133-139(in Chinese).
[2]闫文宁.多端柔性交直流输电系统协调控制策略研究[D].济南:山东大学,2016.
[3]王一振,赵彪,袁志昌,等.柔性直流技术在能源互联网中的应用探讨[J].中国电机工程学报,2015,35(14):3551-3560.Wang Yizhen,Zhao Biao,Yuan Zhichang,et al.Study of the application of VSC-based DC technology in energy internet[J].Proceedings of the CSEE,2015,35(14):3551-3560(in Chinese).
[4]李春叶,李胜.柔性直流输电在城市电网中应用的仿真研究[J].电气技术,2011(1):1-4.Li Chunye,Li Sheng.Simulation study of application of VSC-HVDC in urban area grid[J].Electrical Engineering,2011(1):1-4(in Chinese).
[5]李岩,罗雨,许树楷,等.柔性直流输电技术:应用、进步与期望[J].南方电网技术,2015,9(1):7-13.Li Yan,Luo Yu,Xu Shukai,et al.VSC-HVDC transmission technology:application,advancement and expectation[J].Southern Power System Technology,2015,9(1):7-13(in Chinese).
[6]康重庆,夏清,张伯明.电力系统负荷预测研究综述与发展方向的探讨[J].电力系统自动化,2004,28(17):1-11.Kang Chongqing,Xia Qing,Zhang Boming.Review of power system load forecasting and its development[J].Automation of Electric Power Systems,2004,28(17):1-11(in Chinese).
[7]王大鹏.灰色预测模型及中长期电力负荷预测应用研究[D].武汉:华中科技大学,2013.
[8]马瑞,周谢,彭舟,等.考虑气温因素的负荷特性统计指标关联特征数据挖掘[J].中国电机工程学报,2015(01):43-51.Ma Rui,Zhou Xie,Peng Zhou,et al.Data mining on correlation feature of load characteristics statistical indexes considering temperature[J].Proceedings of the CSEE,2015(01):43-51(in Chinese).
[9]王大鹏,汪秉文.基于变权缓冲灰色模型的中长期负荷预测[J].电网技术,2013,37(1):167-171.Wang Dapeng,Wang Bingwen.Medium-and long-term load forecasting based on variable weights buffer grey model[J].Power System Technology,2013,37(1):167-171(in Chinese).
[10]闫景信.轻型直流输电在城市电网中的应用研究[D].北京:华北电力大学,2008.
[11]Flourentzou N,Agelidis V G,Demetriades G D.VSC-based HVDC power transmission systems:an overview[J].IEEETransactions on Power Electronics,2009,24(3):592-602.
[12]徐政,薛英林,张哲任.大容量架空线柔性直流输电关键技术及前景展望[J].中国电机工程学报,2014,34(29):5051-5062.Xu Zheng,Xue Yinglin,Zhang Zheren.VSC-HVDC technology suitable for bulk power overhead line transmission[J].Proceedings of the CSEE,2014,34(29):5051-5062(in Chinese).
[13]汤广福,贺之渊,庞辉.柔性直流输电工程技术研究、应用及发展[J].电力系统自动化,2013,37(15):3-14.Tang Guangfu,He Zhiyuan,Pang Hui.Research,application and development of VSC-HVDC engineering technology[J].Automation of Electric Power Systems,2013,37(15):3-14(in Chinese).
[14]闫文宁,李可军,王卓迪,等.基于附加有功信号的VSC-MTDC系统平衡控制策略[J].电力自动化设备,2016,36(2):32-39.Yan Wenning,Li Kejun,Wang Zhuodi,et al.Strategy of balanced control based on additional active power signal for VSC-MTDC system[J].Electric Power Automation Equipment,2016,36(2):32-39(in Chinese).
[15]陈朋,李梅航,严兵,等.适用于多端柔性直流输电系统的通用控制策略[J].电力系统自动化,2016,40(21):47-52.Chen Peng,Li Meihang,Yan Bing,et al.General control strategy for VSC-based multi-terminal DC systems[J].Automation of Electric Power Systems,2016,40(21):47-52(in Chinese).
[16]李兴源,曾琦,王渝红,等.柔性直流输电系统控制研究综述[J].高电压技术,2016,42(10):3025-3037.Li Xingyuan,Zeng Qi,Wang Yuhong,et al.Control strategies of voltage source converter based direct current transmission system[J].High Voltage Engineering,2016,42(10):3025-3037(in Chinese).
[17]吴金龙,刘欣和,王先为,等.多端柔性直流输电系统直流电压混合控制策略[J].电网技术,2015,39(6):1593-1599.Wu Jinlong,Liu Xinhe,Wang Xianwei,et al.Research of DCvoltage hybrid control strategy for VSC-MTDC system[J].Power System Technology,2015,39(6):1593-1599(in Chinese).
[18]杨福,梁军,牛庆达.一种适用于交直流互联系统电磁暂态仿真的动态等效方法[J].电力系统保护与控制,2012,40(16):70-76.Yang Fu,Liang Jun,Niu Qingda.A dynamic equivalent method for electromagnetic transient simulation of AC/DCinterconnected power system[J].Power System Protection and Control,2012,40(16):70-76(in Chinese).
[19]郭启伟,赵建国,牛林,等.银东±660 kV直流系统故障的动态特性仿真研究[J].电力系统保护与控制,2012,40(11):133-139.Guo Qiwei,Zhao Jianguo,Niu Lin,et al.Fault simulation of dynamic characteristics about±660 kV Yindong HVDCsystem[J].Power System Protection and Control,2012,40(11):133-139(in Chinese).