| 引用本文: | 李碧君,李兆伟,吴雪莲,等.基于能量变化的暂态频率安全紧急控制决策方法研究[J].电力系统保护与控制,2018,46(20):150-157. |
| LI Bijun,LI Zhaowei,WU Xuelian,et al.Research on the decision method of frequency security emergency control based on energy change[J].Power System Protection and Control,2018,46(20):150-157 |
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| 基于能量变化的暂态频率安全紧急控制决策方法研究 |
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李碧君1,2,李兆伟1,2,吴雪莲1,2,刘福锁1,2,李 威1,2
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(1.智能电网保护和运行控制国家重点实验室, 江苏 南京 211006; 2.南瑞集团有限公司(国网电力科学研究院有限公司)，江苏 南京 211006)
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| 摘要: |
| 从能量变化的视角，研究频率安全紧急控制决策问题。基于系统整体频率特性与系统等值同步发电机转子动能的关系，将频率安全约束转化为对系统等值同步发电机转子动能的约束。基于系统等值同步发电机转子动能变化与不平衡功率累积能量的关联，分析频率安全控制机理。研究通过控制不平衡功率累积能量实现频率安全控制目标的控制决策方法，将以往通过控制不平衡功率，转化为暂态过程的能量控制，从而使控制决策更为灵活。通过实际电网数据仿真验证方法的正确性。 |
| 关键词: 频率安全 紧急控制决策 等值发电机转子动能 不平衡功率 |
| DOI：10.7667/PSPC171425 |
| 分类号: |
| 基金项目:国家电网公司科技项目资助“大型能源基地多直流、交直流送出系统网源协同频率稳定控制技术研究” |
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| Research on the decision method of frequency security emergency control based on energy change |
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LI Bijun1,2,LI Zhaowei1,2,WU Xuelian1,2,LIU Fusuo1,2,LI Wei1,2
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(1. State Key Laboratory of Smart Grid Protection and Control, Nanjing 211006, China;2. NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211006, China)
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| Abstract: |
| From the view of energy change, the decision method of frequency security emergency control is studied. Based on the relationship between the frequency change and the change of kinetic energy stored in the rotating masses of the synchronous motor, the frequency security constraint is changed into the constraint of the kinetic energy stored in the rotating masses of the synchronous. And then, based on the relationship between the variation of kinetic energy stored in the rotating masses of the synchronous motor and the energy accumulated by imbalance power of power system, the mechanism of frequency security emergency control is studied. The energy accumulated by imbalance power is controlled to achieve frequency security control objectives. Therefore, controlling imbalance power in the traditional method can be replaced by controlling energy during the dynamic frequency variation process. The flexibility of frequency security emergency control decision is dramatically increased. By simulation analysis of the real power system, the conclusion is evaluated. This work is supported by Science and Technology Project of State Grid Corporation of China “Research on Grid-Source Coordination Frequency Stability Control Techniques of Multi-DC/AC Transmission System in Large-scale Energy Base”. |
| Key words: frequency security emergency control decision rotating masses of synchronous motor imbalance power |
