计及系统强度约束的设备异构新能源场站集群协同紧急控制策略

doi:10.19595/j.cnki.1000-6753.tces.251679

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Abstract

With the acceleration of global energy transition, the penetration rate of new energy is gradually increasing, which weakens the voltage support strength of the system (referred to as "system strength") and easily induces stability problems such as static voltage instability and sub/super synchronous oscillation. In order to overcome the above challenges, this paper focuses on new energy bases containing multiple heterogeneous renewable energy plants. In response to small-probability events such as large deviations in renewable energy plants prediction and line shutdowns that may trigger a sudden drop in system strength, a collaborative emergency control strategy for multiple renewable energy plants considering system strength constraints is proposed to maintain the safe and stable operation of the new energy base after experiencing a sudden drop in system strength.
Firstly, for new energy bases containing multiple heterogeneous renewable energy plants, an evaluation architecture is established based on the generalized short circuit ratio (gSCR) system strength index to facilitate real-time monitoring of system stability margin. Based on this, the emergency control objective is characterized as the problem of maximizing the output power of renewable energy plants that satisfies the system strength constraints, in order to maintain stable system operation while avoiding cascading failures, e.g., frequency drop which may be induced by active power shortages as much as possible. In order to quickly achieve the above control objectives, real-time feedback of system stability margin is utilized to construct a collaborative emergency control strategy for multiple heterogeneous renewable energy plants in the new energy base based on the primal dual gradient algorithm. On the premise of ensuring sufficient system strength and small disturbance stability margin, the overall output of each renewable energy plants is maximized while maintaining sufficient system strength. After the system strength gradually recovers, the power output of each renewable energy plant will adaptively increase until it reaches the upper limit.
The effectiveness of the proposed strategy is verified through simulation. Compared with traditional complex trial-and-error method, the relative error of the proposed fast calculation method for critical generalized short-circuit ratio is mostly within 3%, with a maximum of 5%, and is not less than trial-and-error value, which demonstrates that the fast calculation method possesses both accuracy and robustness. Under the fault condition, the system without emergency control will become unstable within 0.5 seconds. With the proposed emergency control scheme, the oscillation will stabilize within 3 seconds. In the IEEE 39-bus system with a stability margin set at 0.2, the new energy deloading ratio is 28.01%, which is lower than that of existing methods.
The following conclusions can be drawn from this paper: (1) By analyzing the small disturbance stability of new energy systems, a critical generalized short-circuit ratio calculation method considering heterogeneous characteristics of multiple renewable energy plants is proposed to quantify the small disturbance stability margin. (2) Based on the aforementioned method, the small disturbance stability margin of the distributed real-time monitoring system can be monitored in the real time, providing a reference for the stability evaluation of the operation of new energy bases. (3) The proposed online distributed emergency control strategy for heterogeneous new energy bases enables each renewable power station to actively respond to random fluctuations in system operating conditions and adaptively meet the requirements of the proposed power allocation rules. When the system strength drops, the new energy deloading ratio is optimized, which can avoid sub/super synchronous oscillations caused by weak grid condition and large-scale renewable energy outage.
For new energy bases that include grid-following and grid-forming devices, how to leverage the synergistic effect between grid-following and grid-forming devices to further enhance the effectiveness of emergency control will be an important research direction in the future.

Key words： Renewable integration system strength small signal stability generalized short circuit ratio emergency control

Received: 28 September 2025

PACS:

TM761

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	Liu Yun
	Yang Hanlu
	Pan Jianhong
	Song Xiaozhe
	Wang Ding
	Zhu Jizhong

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Liu Yun,Yang Hanlu,Pan Jianhong等. Collaborative Emergency Control Strategy for Multiple Heterogeneous Renewable Energy Plants Considering System Strength[J]. Transactions of China Electrotechnical Society, 0, (): 20251679-.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.251679 OR https://dgjsxb.ces-transaction.com/EN/Y0/V/I/20251679

[1] 黄萌, 舒思睿, 李锡林, 等. 面向同步稳定性的电力电子并网变流器分析与控制研究综述[J]. 电工技术学报, 2024, 39(19): 5978-5994.
Huang Meng, Shu Sirui, Li Xilin, et al.A review of synchronization-stability-oriented analysis and control of power electronic grid-connected converters[J]. Transactions of China Electrotechnical Society, 2024, 39(19): 5978-5994.
[2] 高磊, 吕敬, 马骏超, 等. 基于电路等效的并网逆变器失稳分析与稳定控制[J]. 电工技术学报, 2024, 39(8): 2325-2341.
Gao Lei, Lü Jing, Ma Junchao, et al.Instability analysis and stability control of grid-connected inverter based on impedance circuit equivalent[J]. Transactions of China Electrotechnical Society, 2024, 39(8): 2325-2341.
[3] 梁军杨, 李红, 宋国杰, 等. 多时间尺度控制下跟网型变换器的同步稳定性分析与改进控制[J]. 电工技术学报, 2024, 39(22): 7182-7196.
Liang Junyang, Li Hong, Song Guojie, et al.Synchronization stability analysis and enhanced control of grid-following converters under multi-timescale control[J]. Transactions of China Electrotechnical Society, 2024, 39(22): 7182-7196.
[4] 李红, 梁军杨, 王振民, 等. 跟网型变换器的小扰动同步稳定机理分析与致稳控制[J]. 电工技术学报, 2024, 39(12): 3802-3815.
Li Hong, Liang Junyang, Wang Zhenmin, et al.Small signal synchronization stability analysis and improved control strategy for grid following converter[J]. Transactions of China Electrotechnical Society, 2024, 39(12): 3802-3815.
[5] 胡光, 庄可好, 高晖胜, 等. 低惯量交流系统并网变流器次/超同步振荡分析[J]. 电工技术学报, 2024, 39(8): 2250-2264.
Hu Guang, Zhuang Kehao, Gao Huisheng, et al.Sub/super synchronous oscillation analysis of grid connected converter in low inertia AC system[J]. Transactions of China Electrotechnical Society, 2024, 39(8): 2250-2264.
[6] 徐式蕴,王一鸣,孙华东,等.国外新能源脱网事故对中国电网安全稳定运行的启示[J].电力系统自动化, 2024, 48(13):1-8.
Xu Shiyun, Wang Yiming, Sun Huadong, et al.Insights from renewable energy outage accidents abroad for secure and stable operation of power grids in China[J]. Automation of Electric Power Systems, 2024, 48(13): 1-8.
[7] 国家市场监督管理总局,国家标准化管理委员会.电力系统安全稳定导则:GB 38755—2019[S].北京:中国标准出版社,2019.
State Administration for Market Regulation,Standardization Administration.Code on security and stability for power system: GB 38755—2019[S]. Beijing: China Standards Press, 2019.
[8] 于琳, 孙华东, 赵兵, 等.新能源并网系统短路比指标分析及临界短路比计算方法[J].中国电机工程学报, 2022, 42(03): 919-929.
Yu Lin, Sun Huadong, Zhao Bing, et al.Short circuit ratio index analysis and critical short circuit ratio calculation of renewable energy grid-connected system[J].Proceedings of the CSEE, 2022, 42(03): 919-929.
[9] 肖浩, 李银红, 石东源, 等.适用于多馈入直流系统静态电压稳定分析的综合短路比强度指标[J].中国电机工程学报, 2017, 37(22):6471-6480.
Xiao Hao, Li Yinhong, Shi Dongyuan, et al.Integrated short circuit ratio strength index for static voltage stability analysis of multi-infeed LCC-HVDC systems[J].Proceedings of the CSEE, 2017, 37(22):6471-6480.
[10] 辛焕海, 董炜, 袁小明, 等. 电力子多馈入系统的广义短路比[J]. 中国电机工程学报, 2016, 36(22): 6013-6027.
Xin Huanhai,Dong Wei,Yuan Xiaoming,et al.Generalized short circuit ratio for multi power electronic based devices infeed to power systems[J].Proceedings of the CSEE,2016,36(22):6013-6027(in Chinese).
[11] Liu Chenxi, Xin Huanhai, Wu Di, et al.Generalized Operational Short-Circuit Ratio for Grid Strength Assessment in Power Systems With High Renewable Penetration[J].IEEE Transactions on Power Systems, 2024, 39(4): 5479-5494.
[12] Kim Y-K, Lee G-S, Yoon J-S, et al.Evaluation for Maximum Allowable Capacity of Renewable Energy Source Considering AC System Strength Measures[J]. IEEE Transactions on Sustainable Energy, 2022, 13(2): 1123-34.
[13] Yuan Hui, Xin Huanhai, Wu Di, et al.Assessing maximal capacity of grid-following converters with grid strength constraints[J].IEEE Transactions on Sustainable Energy, 2022, 13(4): 2119-2132.
[14] Badesa L, Teng F, Strbac G.Conditions for Regional Frequency Stability in Power System Scheduling—Part II: Application to Unit Commitment[J]. IEEE Transactions on Power Systems, 2021, 36(6): 5567-5577.
[15] Yuan Hui, Xin Huanhai, Li Zhiyi, et al.Enhancing the Small-Signal Stability of Power Grids via Optimally Coordinating Inverter-Based Resources[J]. IEEE Transactions on Sustainable Energy, 2025, 16(1): 17-31.
[16] 楼贤嗣,马光,郭创新,等.电网运行全过程风险协调控制体系与架构设计[J].电力系统自动化,2020,44(5):161-170.
Lou Xiansi,Ma Guang,Guo Chuangxin,et al.System and framework design of risk coordination control for whole operation process of power system[J] . Automation of Electric Power Systems,2020,44(5):161-170.
[17] 辛保安,李明节,贺静波,等.新型电力系统安全防御体系探究[J].中国电机工程学报,2023,43(15):5723-5731.
Xin Bao'An,Li Mingjie,He Jingbo,et al.Research on Security Defense System of New Power System[J].Proceedings of the CSEE,2023,43(15):5723-5731.
[18] Pradhan V, Kulkarni A, Khaparde S.A Model-Free Approach for Emergency Damping Control Using Wide Area Measurements[J]. IEEE Transactions on Power Systems, 2018, 33(5): 4902-4912.
[19] 陈磊, 路晓敏, 陈亦平, 等.利用暂态能量流的超低频振荡在线分析与紧急控制方法[J].电力系统自动化, 2017, 41(17):9-14.
Chen Lei, Lu Xiaomin, Chen Yiping, et al.Online analysis and emergency control of ultra-low frequency oscillation using transient energy flow[J]. Automation of Electric Power Systems, 2017, 41(17): 9-14.
[20] Matevosyan J. Weak grid experiences in ERCOT[R/OL].2023. Available: https://www.esig.energy/download/wecc-workshop-weak-grid-experiences-in-ercot julia-matevosyan/.
[21] 孙华东, 许涛, 郭强, 等.英国“8·9”大停电事故分析及对中国电网的启示[J].中国电机工程学报, 2019, 39(21):6183-6192.
Sun Huadong, Xu Tao, Guo Qiang, et al.Analysis on blackout in great Britain power grid on august 9th, 2019 and its enlightenment to power grid in China[J] . Proceedings of the CSEE, 2019, 39(21): 6183-6191.
[22] 樊陈, 姚建国, 张琦兵, 等. 英国“8·9”大停电事故振荡事件分析及思考[J].电力工程技术, 2020, 39(04):34-41.
Fan Chen, Yao Jianguo, Zhang Qibing, et al.Reflection and analysis for oscillation of the blackout event of 9 August 2019 in UK[J].Electric Power Engineering Technology, 2020, 39(4): 34-41.
[23] 辛焕海, 甘德强, 鞠平.多馈入电力系统广义短路比: 多样化新能源场景[J].中国电机工程学报, 2020, 40(17): 5516-5526.
Xin Huanhai, Gan Deqiang, Ju Ping.Generalized short circuit ratio of power systems with multiple power electronic devices: analysis for various renewable power generations[J].Proceedings of the CSEE, 2020, 40(17): 5516-5526.
[24] 王奕宁, 向往, 张浩博, 等.构网型直驱风力发电机组比例优化配置分析[J].电网技术, 2025, 49(02): 490-500.
Wang Yining, Xiang Wang, Zhang Haobo.Analysis of optimal proportion configuration of grid forming direct drive wind turbine[J].Power System Technology, 2025, 49(02): 490-500.
[25] 周瑀涵, 辛焕海, 鞠平. 基于广义短路比的多馈入系统强度量化原理与方法: 回顾、探讨与展望[J]. 中国电机工程学报, 2023, 43(10): 3794-3811.
Zhou Yuhan, Xin Huanhai, Ju Ping.System strength quantification principle and method of multi-infeed systems based on generalized short-circuit ratio: reviews, discussions and outlooks[J]. Proceedings of the CSEE, 2023, 43(10): 3794-3811.
[26] Zhou J Z, Ding Hui, Fan Shengtao, et al.Impact of short-circuit ratio and phase-locked-loop parameters on the small-signal behavior of a VSC-HVDC converter[J].IEEE Transactions on Power Delivery, 2014, 29(5): 2287-2296.
[27] Liu Yun, Lai Xiang, Xin Huanhai, et al.Generalized Short-Circuit Ratio Based Distributed Real-Time Stability Assessment of Renewable Power Systems[J]. IEEE Transactions on Power Systems, 2023, 38(6): 5953-5956.
[28] Lai Xiang, Liu Yun, Zhang Xinan, et al.Grid Strength Constrained Cooperative Control of Renewable Power Plants for Guaranteed Small-Signal Stability[J]. IEEE Transactions on Power Systems, 2024, 39(6): 7425-7428.
[29] Luenberger D G, Ye Y.Linear and nonlinear programming[M]. 4th ed. Berlin: Springer Publishing Company, Incorporated, 2015.
[30] Du Wenjuan, Wang Yijun, Wang Haifeng, et al.Small-disturbance stability limit of a grid-connected wind farm with PMSGs in the timescale of DC voltage dynamics[J]. IEEE Transactions on Power Systems, 2021, 36(3): 2366-2379.