| 引用本文: | 李东东,刘振宇,尹睿.基于幂级数展开的电力系统戴维南等值参数跟踪算法[J].电力系统保护与控制,2019,47(9):35-41.[点击复制] |
| LI Dongdong,LIU Zhenyu,YIN Rui.A tracing algorithm of Thevenin equivalent parameters for power systems based on power series expansion[J].Power System Protection and Control,2019,47(9):35-41[点击复制] |
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| 摘要: |
| 针对传统电力系统戴维南等值参数计算方法中存在的弊端，提出一种基于幂级数展开的戴维南等值参数跟踪算法。该算法假设在相邻采样时刻内系统戴维南等值参数幅值不变，利用幂级数展开式跟踪系统戴维南等值参数，不仅有效避免了参数漂移问题，而且能较大程度地反映等值系统内部负荷扰动。同时，该算法在系统三相短路故障后能瞬间恢复对戴维南等值参数的准确跟踪，即适用于系统短路故障切除后的暂态过程。最后，分别通过在简单双母线算例系统和IEEE39节点算例系统中的仿真验证了所提算法的鲁棒性和准确性。 |
| 关键词: 戴维南等值 幂级数展开式 参数漂移 负荷扰动 故障 |
| DOI：10.7667/PSPC180564 |
| 投稿时间：2018-05-14修订日期：2018-08-05 |
| 基金项目:国家自然科学基金项目资助(51507100); 上海市科学技术委员会资助(17020500800,13DZ2251900, 10DZ2273400); 上海市“曙光计划”资助(15SG50) |
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| A tracing algorithm of Thevenin equivalent parameters for power systems based on power series expansion |
| LI Dongdong,LIU Zhenyu,YIN Rui |
| (Shanghai University of Electric Power, Shanghai 200090, China) |
| Abstract: |
| Aiming at the shortcomings of the traditional power system’s Thevenin equivalent parameter calculation method, this paper puts forward a tracing algorithm for the Thevenin equivalent parameters based on power series expansion. The algorithm assumes that the amplitude of the system’s Thevenin equivalent parameters is constant during the adjacent sampling time, and uses the power series expansion to track the Thevenin equivalent parameters. The algorithm not only effectively avoids the parameter drift problem, but also reflects internal load disturbance of the equivalent system to a large extent. At the same time, the algorithm can instantly restore the accurate tracking of the Thevenin equivalent parameter after the system three-phase short-circuit fault, which is available for the transient process after the system short-circuit fault is removed. Finally, the robustness and accuracy of the proposed algorithm are verified by simulations in a simple double bus example system and an IEEE39 node example system. This work is supported by National Natural Science Foundation of China (No. 51507100), Science and Technology Commission of Shanghai Municipality (No. 17020500800, No. 13DZ2251900 and No. 10DZ2273400) and "Shuguang Program" of Shanghai Education Development Foundation and Shanghai Municipal Education Commission (No.15SG50). |
| Key words: Thevenin equivalent power series expansion parameter drift load disturbance fault |
