引用本文: | 王超,常海军,摆世彬,等.高比例新能源与多直流场景下连锁故障防控策略研究[J].电力系统保护与控制,2019,47(7):49-57.[点击复制] |
WANG Chao, CHANG Haijun, BAI Shibin,et al.Study on the prevention and control strategy of cascading failure of bulk power system with multi-HVDC and high proportion of renewable energy[J].Power System Protection and Control,2019,47(7):49-57[点击复制] |
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摘要: |
高比例新能源与多直流共存环境下系统扰动导致新能源与交直流深度耦合,连锁故障模式及演化过程更加复杂多变,需进一步深入研究其连锁故障风险及防控策略。首先,为充分考虑实际控制保护装置动作与系统电气量的交互影响,采用基于控制保护装置动作评估指标的时域仿真方法搜索高风险事故链。在此基础上,提出基于事故链信息的紧急控制思路,对可演化为连锁事故但自身无紧急措施的单个扰动配置紧急措施,加强和完善现有紧急控制体系对连锁事故链的阻断能力。以系统总风险代价最小为目标对预防控制和紧急控制进行协调优化,给出了协调控制优化模型与实现方案。最后,基于西北电网高比例新能源与多直流送出实际电网数据的仿真结果,验证了所提控制思路与控制方法的有效性。 |
关键词: 高比例新能源 多直流 连锁故障 控制策略 |
DOI:10.7667/PSPC180473 |
投稿时间:2018-04-23修订日期:2018-05-25 |
基金项目:国家电网公司科技项目资助(5229NX16001D)“宁夏多直流与高比例新能源共存送端电网连锁故障防控实用化技术深化研究” |
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Study on the prevention and control strategy of cascading failure of bulk power system with multi-HVDC and high proportion of renewable energy |
WANG Chao,CHANG Haijun,BAI Shibin,LI Zhaowei,TIAN Zhihao,LIU Fusuo,LI Wei,SONG Xiaofang |
(NARI Group Corporation /State Grid Electric Power Research Institute, Nanjing 211106, China;State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750001, China) |
Abstract: |
Cascading failure mode and evolution process is much more complex and changeable because of the much coupling between the renewable generation and the AC/DC power system after system disturbance. Further research of the risk assessment and control strategy of this kind of cascading failure is required. Firstly, in order to fully consider the interaction between the practical control and protection devices action and system electrical quantities, time domain simulation method based on evaluation index of security devices such as relay devices is used to search fault chains with high risk. Secondly, a new emergency control method based on fault chain information is proposed, to set up emergency control measures for single disturbance that can evolve into cascading fault chains but without emergency control measures. This new control method can further strengthen and perfect the ability to block the fault chain of cascading failure of current emergency control system. Aiming at minimizing the total risk cost of control, the coordination and optimization of preventive control and emergency control are carried out, and the coordinated control optimization model and implementation program are given respectively. Finally, simulation results and analysis based on real-sized power grid in Northwest China prove the rationality and effectiveness of the proposed control method. This work is supported by Science and Technology Project of State Grid Corporation of China (No. 5229NX16001D) “Study on the Practical Prevention and Control Strategy of Cascading Failures of Ningxia Sending end Power Grid with Multi-HVDC and High Proportion of Renewable Energy”. |
Key words: high proportion of renewable energy multi-HVDC system cascading failure control strategy |