| 引用本文: | 杨瑞,和敬涵,许寅,石正.考虑安控措施的交直流电力系统动态等值边界确定方法[J].电力自动化设备,2020,40(4): |
| YANG Rui,HE Jinghan,XU Yin,SHI Zheng.Determination method of dynamic equivalent boundary for AC-DC power system considering security control actions[J].Electric Power Automation Equipment,2020,40(4): |
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| 摘要: |
| 特高压交直流电网的快速发展使得故障对系统的冲击由局部化转向全局化，因此有必要对系统进行暂态安全评估以提高供电可靠性。为了能在安全评估中准确模拟交直流系统发生故障后的动态特性及响应，并减小仿真规模及计算量，需对系统进行动态等值。提出了一种综合考虑交直流连锁故障及采取安控措施的交直流电力系统动态等值边界的确定方法，基于图论利用Dijkstra算法自动获取不同故障条件下的等值边界，根据误差要求调整等值区域，为不同预想故障下的不同动态等值模型的建立提供一个较为合理的等值边界。最后，基于IEEE 39节点标准系统构造的两区四直流互联电网与山东电网的模型，验证了所提方法的有效性。 |
| 关键词: 交直流电力系统 交直流耦合 安控措施 动态等值 等值边界 Dijkstra算法 |
| DOI：10.16081/j.epae.202004004 |
| 分类号:TM714 |
| 基金项目:国家重点研发计划项目(2017YFB0902600) |
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| Determination method of dynamic equivalent boundary for AC-DC power system considering security control actions |
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YANG Rui, HE Jinghan, XU Yin, SHI Zheng
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School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
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| Abstract: |
| With the rapid development of UHV(Ultra High Voltage) AC-DC power system, the impact of fault on the system changes from local to global. Therefore, it is necessary to conduct transient security assessment to improve the power supply reliability. In the transient security assessment, it is necessary to develop a dynamic equivalent model for the system to accurately simulate the post-contingency dynamic characteristics and responses of AC-DC power system, and reduce the simulation scale and computational burden. A method to determine the dynamic equivalent boundary of AC-DC power system considering AC-DC cascading failures and security control actions is proposed. Based on the graph theory, Dijkstra algorithm is used to automatically produce the equivalent boundary under different fault conditions and adjust the equivalent region according to the error requirement. This method, hence, can provide a reasonable equivalent boundary for the development of different dynamic equivalent models under a variety of expected faults. Finally, the simulative results of a two-zone four-DC interconnected power grid based on IEEE 39-bus system and Shandong Power Grid model verify the effectiveness of the proposed method. |
| Key words: AC-DC power system AC-DC coupling security control actions dynamic equivalence equivalent boundary Dijkstra algorithm |
