含大规模新能源集中外送型电网高频第三道防线配置方法
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摘要
对于新能源富集的电力集中外送型电网,传统式高频第三道防线一是会切除大量火电机组,削弱电网电压和频率的控制能力;二是可能导致频率长时间悬浮在较高状态。对此,根据各类电源特点,同时兼顾事故后频率上升的紧急程度,提出了一种通过合理配置各类电源的频率定值和动作延时定值的高频第三道防线配置方法,即最高频段火电频率定值大于新能源和调峰型水电,较高频段火电动作延时定值大于新能源和调峰型水电,从而达到全高频段(频率大于50.5 Hz)优先切除新能源和调峰型水电,尽量保留火电的目的。所提方法可为其他新能源富集的外送型电网在加强第三道防线上提供重要参考。
For the power-integrated-exporting grid with rich renewable energy, traditional high frequency third defensive line will result in weakening of voltage control capability and frequency, and suspending for a long time. In this paper, a new configuration method based on source characteristics and frequency urgency is proposed, in which renewable energy and peak-shaving hydropower are tripped first and then thermal power is retained by reasonably allocating the frequency and time-delay of these power sources in all high frequency region. That is, the set frequency and time-delay value of thermal power is larger than that of renewable energy and peak regulation hydropower in the highest and higher frequency region respectively. The method proposed in this paper can provide important reference for other power-exporting grid with rich renewable energy.
For the power-integrated-exporting grid with rich renewable energy, traditional high frequency third defensive line will result in weakening of voltage control capability and frequency, and suspending for a long time. In this paper, a new configuration method based on source characteristics and frequency urgency is proposed, in which renewable energy and peak-shaving hydropower are tripped first and then thermal power is retained by reasonably allocating the frequency and time-delay of these power sources in all high frequency region. That is, the set frequency and time-delay value of thermal power is larger than that of renewable energy and peak regulation hydropower in the highest and higher frequency region respectively. The method proposed in this paper can provide important reference for other power-exporting grid with rich renewable energy.
引文
[1]于强,孙华东,仲悟之,等.扎鲁特-青州特高压直流输电工程投运后东北电网的稳定特性及控制措施研究[J].电网技术,2018,42(7):2023-2029.Yu Qiang,Sun Huadong,Zhong Wuzhi,et al.Stability characteristics and control measures of northeast power grid integrated with Zhalute-Qingzhou UHVDC transmission project[J].Power System Technology,2018,42(7):2023-2029(in Chinese).
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[10]丁涛,郭庆来,孙宏斌,等.抑制大规模连锁脱网的风电汇集区域电压预防控制策略[J].电力系统自动化,2014,38(11):7-12.Ding tao,Guo Qinglai,Sun Hongbin,et al.A voltage control strategy for preventing cascading trips of large-scale wind power in centralized area[J].Automation of Electric Power Systems,2014,38(11):7-12.
[11]孙华东,张振宇,林伟芳,等.2011年西北电网风机脱网事故分析及启示[J].电网技术,2012,36(10):76-80(in Chinese).Sun Huadong,Zhang Zhenyu,Lin Weifang,et al.Analysis on serious wind turbine generators tripping accident in Northwest China Power Grid in 2011 and its lessons[J].Power System Technology,2012,36(10):76-80(in Chinese).
[12]叶希,鲁宗相,乔颖.大规模风电机组连锁脱网事故机理初探[J].电力系统自动化,2012,35(8):11-17.Ye Xi,Lu Zongxiang,Qiao Ying.A primary analysis on mechanism of large scale cascading trip-off of wind turbine generators[J].Automation of Electric Power Systems,2012,35(8):11-17(in Chinese).
[13]周明,葛江北,郭飞,等.改善连锁脱网的风电场群电压无功紧急控制策略[J].电力系统自动化,2016,40(5):71-77.Zhou Ming,Ge Jiangbei,Guo Fei,et al.Voltage and reactive power emergency control strategy of wind farm cluster against cascading trip-off[J].Automation of Electric Power Systems,2016,40(5):71-77(in Chinese).
[14]赵宏博,姚良忠,王伟胜,等.大规模风电高压脱网分析及协调预防控制策略[J].电力系统自动化,2015,39(23):43-48.Zhao Hongbo,Yao Liangzhong,Wang Weisheng,et al.Outage analysis of large scale wind power under high voltage condition and coordinated prevention and control strategy[J].Automation of Electric Power Systems,2015,39(23):43-48(in Chinese).
[15]熊小伏,周永忠,周家启,等.计及负荷频率特性的低频减载方案研究[J],中国电机工程学报,2005,25(19):48-51.Xiong Xiaofu,Zhou Yongzhong,Zhou Jiaqi,et al.Study of underfrequency load shedding scheme based on load frequency characteristics[J].Proceedings of the CSEE,2005,25(19):48-51(in Chinese).
[2]袁季修.试论防止电力系统大面积停电的紧急控制-电力系统安全稳定运行的第三道防线[J].电网技术,1999,23(4):1-4.Yuan Jixiu.Emergency control for preventing widespread blackout of power system-the third line of defense[J].Power System Technology,1999,23(4):1-4(in Chinese).
[3]王一振,马世英,王青,等.电力系统孤网高频问题研究现状和发展趋势[J].电网技术,2012,36(12):165-169.Wang Yizhen,Ma Shiying,Wang Qing,et al.Present status and developing trend of research on over frequency in isolated power grid[J].Power System Technology,2012,36(12):165-169(in Chinese).
[4]张志强,徐友平,袁荣湘,等.大型互联区域电网解列后送端电网频率特性及高频切机方案[J].电网技术,2015,39(1):288-293.Zhang Zhiqiang,Xu Youping,Yuan Rongxiaong,et al.Frequency characteristics of power grid at sending end of split large-scale interconnected regional power grid and corresponding over-frequency generator-tripping scheme[J].Power System Technology,2015,39(1):288-293(in Chinese).
[5]张志强,袁荣湘,徐友平,等.适应多回特高压直流的四川电网高频切机优化[J].电力系统自动化,2016,40(2):141-146.Zhang Zhiqiang,Yuan Rongxiaong,Xu Youping,et al.Optimization of over-frequency generator-tripping scheme in Sichuan power grid adaptable to multi-UHVDC transmission project[J].Automation of Electric Power Systems,2016,40(2):141-146(in Chinese).
[6]贺静波,庄伟,许涛,等.暂态过电压引起风电机组连锁脱网风险分析及对策[J].电网技术,2016,40(6):1841-1844.He Jingbo,Zhuang Wei,Xu Tao,et al.Study on cascading tripping risk of wind turbines caused by transient overvoltage and its countermeasures[J].Power System Technology,2016,40(6):1841-1844(in Chinese).
[7]屠竞哲,张健,刘明松,等.风火打捆直流外送系统直流故障引发风机脱网的问题研究[J].电网技术,2015,39(12):3333-3338.Tu Jingzhe,Zhang Jian,Liu Mingsong,et al.Study on wind turbine generators tripping caused by HVDC contingencies of wind-thermalbundled HVDC transmission systems[J].Power System Technology,2015,39(12):3333-3338(in Chinese).
[8]吴萍,陈昊,赵兵,等.风光火打捆交直流混联外送系统交互影响及稳定性研究[J].电网技术,2016,40(7):1934-1942.Wu Ping,Chen Hao,Zhao Bing,et al.Study on interaction and stability characteristics of bundled Wind-PV-Thermal power transmitted with AC/DC system[J].Power System Technology,2015,40(7):1934-1942(in Chinese).
[9]罗煦之,张健,贺静波,等.计及暂态过电压约束的直流闭锁安控与极控协调控制研究[J].电网技术,2015,9(39):2526-2531.Luo Xuzhi,Zhang Jian,He Jingbo,et al.Coordinated control research of stability control system and pole control system under DC system block considering transient overvoltage[J].Power System Technology,2015,9(39):2526-2531(in Chinese).
[10]丁涛,郭庆来,孙宏斌,等.抑制大规模连锁脱网的风电汇集区域电压预防控制策略[J].电力系统自动化,2014,38(11):7-12.Ding tao,Guo Qinglai,Sun Hongbin,et al.A voltage control strategy for preventing cascading trips of large-scale wind power in centralized area[J].Automation of Electric Power Systems,2014,38(11):7-12.
[11]孙华东,张振宇,林伟芳,等.2011年西北电网风机脱网事故分析及启示[J].电网技术,2012,36(10):76-80(in Chinese).Sun Huadong,Zhang Zhenyu,Lin Weifang,et al.Analysis on serious wind turbine generators tripping accident in Northwest China Power Grid in 2011 and its lessons[J].Power System Technology,2012,36(10):76-80(in Chinese).
[12]叶希,鲁宗相,乔颖.大规模风电机组连锁脱网事故机理初探[J].电力系统自动化,2012,35(8):11-17.Ye Xi,Lu Zongxiang,Qiao Ying.A primary analysis on mechanism of large scale cascading trip-off of wind turbine generators[J].Automation of Electric Power Systems,2012,35(8):11-17(in Chinese).
[13]周明,葛江北,郭飞,等.改善连锁脱网的风电场群电压无功紧急控制策略[J].电力系统自动化,2016,40(5):71-77.Zhou Ming,Ge Jiangbei,Guo Fei,et al.Voltage and reactive power emergency control strategy of wind farm cluster against cascading trip-off[J].Automation of Electric Power Systems,2016,40(5):71-77(in Chinese).
[14]赵宏博,姚良忠,王伟胜,等.大规模风电高压脱网分析及协调预防控制策略[J].电力系统自动化,2015,39(23):43-48.Zhao Hongbo,Yao Liangzhong,Wang Weisheng,et al.Outage analysis of large scale wind power under high voltage condition and coordinated prevention and control strategy[J].Automation of Electric Power Systems,2015,39(23):43-48(in Chinese).
[15]熊小伏,周永忠,周家启,等.计及负荷频率特性的低频减载方案研究[J],中国电机工程学报,2005,25(19):48-51.Xiong Xiaofu,Zhou Yongzhong,Zhou Jiaqi,et al.Study of underfrequency load shedding scheme based on load frequency characteristics[J].Proceedings of the CSEE,2005,25(19):48-51(in Chinese).