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| Effects of initial rotating speed and guide vane control strategy on pump power outage process of variable speed pumped storage unit |
| CHEN Yongyan1, CHEN Diyi1, DENG Yuwen1, MA Cheng1, ZHOU Ye2, SUN Huifang3, ZHOU Daqing4 |
| 1. College of Water Resources & Architectural Engineering, Northwest A&F University, Yangling 712100, China;
2. China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
3. Pumped Storage Technology & Economy Research Institute, State Grid Xinyuan Holdings Co., Ltd., Beijing 100761, China;
4. College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China |
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Abstract The adverse phenomena such as pressure fluctuations, backflow and double peaks in speed caused by the closing of the guide vane during pump outage condition of variable speed pumped storage units, which greatly affect the safe and stable operation of the units. The initial speed, as an important parameter affecting the dynamic characteristics of the unit, is not yet clear as to the law of its influence on the speed and flow rate during pump outage. To address the above problems, a model of the regulation system of variable speed pumped storage units is constructed based on the one-dimensional transient flow theory characteristic line method and the improved Suter transformation method. By simulating the pump outage process of variable speed pumped storage units, the influence law of the guide vane closing time on the characteristic parameters is analysed and the intrinsic link between the initial operating speed and the reversing flow and reversing speed poles is elucidated. The results show that the time domain response trends of the characteristic parameters are very similar during the positive velocity positive flow phase and the early positive velocity negative flow phase. Meanwhile, a comparison of the results of different guide vane closing times led to the conclusion that entering the shutdown from the negative velocity negative flow phase enhances the safety and stability of the unit. In addition, simulations of the pump disconnection process using different initial operating speeds at the same head and input power conditions led to the conclusion that the flow rate and speed extremes characteristics were negatively correlated with the initial operating speed.
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Received: 21 August 2023
Published: 15 June 2024
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| [1] 赵志高，杨建东，董旭柱，等.基于动态实验的双馈抽水蓄能机组空载特性与变速演化[J].中国电机工程学报，2022，42(20):7439-7451.
ZHAO Zhigao，YANG Jiandong，DONG Xuzhu,et al. No-load Characteristics and Variable Speed Evolution of Doubly-fed Pumped Storage Unit Based on Dynamic Experiment Platform[J]. Proceedings of the CSEE，2022，42(20):7439-7451.
[2] Iliev I，Trivedi C，Dahlhaug O G. Variable-speed operation of Francis turbines: A review of the perspectives and challenges[J]. Renewable and Sustainable Energy Reviews， 2019，103: 109-121.
[3] 李丰攀，周建中，顾然，等.抽水蓄能机组水泵断电工况多目标优化调节[J].中国农村水利水电，2018(03):155-160.
LI Fengpan，ZHOU Jianzhong，GU Ran,et al. Multi-objective Optimal Regulation in Pump Outage of Pumped Storage Units[J]. China Rural Water and Hydropower，2018(03):155-160.
[4] 姜海军，徐青，张高高，等.变速抽水蓄能机组运行工况转换控制研究[J].水电与抽水蓄能，2019，5(04):31-35.
JIANG Haijun，XU Qing，ZHANG Gaogao,et al. Research on Operation Conditions Conversion Control of Variable Speed Pumped Storage Unit[J]. Hydropower and Pumped Storage，2019，5(04):31-35.
[5] Kuwabara T，Shibuya A，Furuta H,et al. Design and dynamic response characteristics of 400 MW adjustable speed pumped storage unit for Ohkawachi power station[J]. IEEE Transactions on Energy Conversion， 1996， 11(2): 376-384.
[6] 陈帝伊，刘公成，梁潇，等.定-变速抽水蓄能机组调相-发电过渡过程动态特性研究[J].水利学报，2023，54(01):105-116.
CHEN Diyi，LIU Gongcheng，LIANG Xiao,et al. Study on dynamic characteristics of phase modulation－generation transition process of fixed－speed and variable－speed pumped－storage units[J].Journal of Hydraulic Engineering，2023，54(01):105-116.
[7] 周喜军，丁景焕，黄一凡，等.可变速抽水蓄能机组大波动工况转速上升规律[J].水力发电学报，2021，40(08):57-64.
ZHOU Xijun，DING Jinghuan，HUANG Yifan,et al. Simulations and analysis of speed rising of variable-speed pumped storage units under large disturbances[J].Journal of Hydroelectric Engineering，2021，40(08):57-64.
[8] 张敏.可变速抽水蓄能机组水泵工况功率响应及一次调频特性研究[D].西安理工大学，2019.
ZHANG Min.Study on dynamic performance of pump working conditions of variable speed pump storage units[D]. Xi’an University of Technology，2019.
[9] Osburn G D， Atwater P L. Design and testing of a back-to-back starting system for pumped storage hydrogenerators at Mt. Elbert Powerplant[J]. IEEE transactions on energy conversion，1992，7(2): 280-288.
[10] 李东阔，宫奎，王康生，等.抽水蓄能机组水泵断电过程中的机组反转问题[J].水力发电，2020，46(05):99-104.
LI Dongkuo，GONG Kui，WANG Kangsheng,et al. Speed-Reversal Issue of Pump Storage Unit in Pump Load Rejection Process[J].Water Power，2020，46(05):99-104.
[11] 王亮，张飞，狄宏伟，等.抽水蓄能机组水泵工况下断电反转特性分析[J].中国农村水利水电，2020(08):243-248.
WANG Liang，ZHANG Fei，DI Hongwei,et al. Reversal Rotation Characteristic Analysis of Pump Storage Unit in Pump Load Rejection[J].China Rural Water and Hydropower，2020(08):243-248.
[12] Danciocan G，Louis J. Experimental analysis of rotor-stator interaction in a pump-turbine[C]//Proceedings of 23rd IAHR Symposium，Yokohama，Japan. 2006.
[13] 冯陈，周大庆，郑源，等.基于精细化建模的抽水蓄能机组低水头背靠背启动多目标优化[J].中国电机工程学报，2023，43(08):3059-3071.
FENG Chen，ZHOU Daqing，ZHENG Yuan,et al. Multi-objective Optimization of Back-to-back Starting Process for Pumped Storage Units at Low Head Area Based on Refined Model[J].Proceedings of the CSEE，2023，43(08):3059-3071.
[14] 张文科，张健，俞晓东，等.可变速抽蓄机组运行转速对甩负荷过渡过程的影响[J].排灌机械工程学报，2022，40(06):570-575.
Zhang Wenke，Zhang Jian，Yu Xiaodong,et al. Influence of variable speed pumped-storage unit operating speed on load rejection transient process[J].Journal of Drainage and Irrigation Machinery Engineering，2022，40(06):570-575.
[15] 陈家远．水力过渡过程的数学模拟及控制［M］．成都: 四川大学出版社，2008．
CHEN Jiayuan. Mathematical simulation and control of hydraulic transition processes［M］. Cheng du: Sichuan University Press，2008.
[16] 赵志高，周建中，张勇传，等.抽水蓄能机组复杂空载工况增益自适应PID控制[J].电网技术，2018，42(12):3918-3927.
ZHAO Zhigao，ZHOU Jianzhong，ZHANG Yongchuan,et al. Heuristic Gain-Scheduling Nonlinear PID Control of Pumped Storage Units Under Complicated No-Load Condition[J].Power System Technology，2018，42(12):3918-3927.
[17] 潘全成. 双馈风电模拟系统的研究与实现[D].北京工业大学,2019.
PAN Quancheng. Research and Implementation of Doubly Fed Wind Power Simulation System[D]. Beijing University of Technology，2019.
[18] 蔡卫江，王永潭，施海东，等.大型变速抽水蓄能机组的转速及开度寻优策略研究[J].大电机技术，2020(04):58-63.
CAI Weijiang，WANG Yongtan，SHI Haidong,et al. Study on Optimization Strategy of Speed and Opening of Variable Speed Pumped Storage Unit[J].Large Electric Machine and Hydraulic Turbine，2020(04):58-63.
[19] 李琪飞，蒋雷，李仁年，等.水泵水轮机反水泵工况区压力脉动特性分析[J].水利学报，2015，46(03):350-356.
LI Qifei，JIANG lei，LI Rennian,et al. Study of pump-turbine’s pressure fluctuations at reverse pump mode[J]. Journal of Hydraulic Engineering，2015，46(03):350-356.
[20] 张健，房玉厅，刘徽，等.抽水蓄能电站可逆机组关闭规律研究[J].流体机械，2004(12):14-18.
ZHANG Jian，FANG Yuting，LIU Hui,et al. Study on the Reversible Pump-turbine Closing Law in Pumped Storage Plant[J].Fluid Machinery，2004(12):14-18. |
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