| 引用本文: | 张志杰,姚伟,高磊,等.考虑发电机性能差异性的励磁顶值电压优化配置方法[J].电力系统保护与控制,2020,48(12):41-49.[点击复制] |
| ZHANG Zhijie,YAO Wei,GAO Lei,et al.Optimal configuration of excitation system ceiling voltage considering different performance of generators[J].Power System Protection and Control,2020,48(12):41-49[点击复制] |
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| 摘要: |
| 发电机强励紧急控制配合具备高顶值电压的励磁系统，可充分发挥机组强励功能，改善电网暂态稳定性。发电机励磁系统通常按照统一标准设计，无法兼顾实际故障下机组能够发挥的不同调节性能。考虑调节性能差异性后对发电机实施差异化控制或差异化配置控制参数，可有效优化网源协调性。提出一种考虑机组性能差异性的励磁顶值电压优化配置方法，利用系统暂态稳定裕度指标相对机组励磁顶值电压的灵敏度衡量不同临界机的调节性能，根据灵敏度大小对临界机组励磁顶值电压进行差异化配置。在修改的10机39节点交直流混联系统中，仿真研究表明:差异化配置励磁顶值电压能较好改善系统暂态稳定性，提升区域联络线输送功率，严重故障冲击下对系统暂态稳定性提升作用更显著。 |
| 关键词: 励磁系统 强励紧急控制 差异化设计 暂态稳定性 发电机 |
| DOI：10.19783/j.cnki.pspc.190785 |
| 投稿时间：2019-07-05修订日期：2019-11-21 |
| 基金项目:国家电网公司科技项目资助“基于发电机性能差异化及电网主导稳定的网源协调性能评估和优化技术研究”;国家自然科学基金项目资助(51577075) |
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| Optimal configuration of excitation system ceiling voltage considering different performance of generators |
| ZHANG Zhijie,YAO Wei,GAO Lei,WEN Jinyu |
| (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;China Electric Power Research Institute, Beijing 100192, China) |
| Abstract: |
| Generator Forced Excitation Emergency Control (GFEEC) combined with a high excitation system ceiling voltage can make the best use of the generator strong excitation function and then improve the transient stability of the power grid. The generator excitation system is usually designed according to a uniform standard, such that it is impossible to consider the different adjustment performance that a unit can perform under actual faults. If differentiated control strategies or configuration of control parameters are applied to the generators after taking into account the adjustment performance difference, the coordination between power grid and source can be effectively optimized. In this paper, an optimized method of configuring the excitation system ceiling voltages of different generators is proposed. The sensitivity of the system transient stability margin index to the excitation system ceiling voltage of each generator is calculated to measure the different adjustment performance of critical generators. Then, the excitation system ceiling voltages of critical generators are configured respectively according to the value of sensitivity. The simulation study in the modified 10-machine 39-bus AC/DC hybrid system shows that the transient stability of the system and the transmission power of the area tie-line can be improved significantly with the differential configuration of excitation system ceiling voltages. Under some severe faults, the improvement of the system transient stability is even more significant. This work is supported by Science and Technology Project of State Grid Corporation of China “Technical Research of Grid-Source Coordination Performance Assessment and Optimization based on Generator Performance Differentiation and Power Grid Dominated Stability” and National Natural Science Foundation of China (No. 51577075). |
| Key words: excitation system forced excitation emergency control differentiated design transient stability generator |
