中国电力2025，Vol.58Issue(3)：98-107,10.DOI:10.11930/j.issn.1004-9649.202402004
基于短路容量量化评估的断面极限功率解析计算方法
An Analytical Calculation Method for Total Transfer Capability of Transmission Section Based on Evaluation of System Short Circuit Capability
摘要
Abstract
In the HVDC sending-end system,the system's short-circuit capacity is mainly provided by conventional generating units.When the operating mode of conventional generating units changes and the short-circuit capacity changes,it will have a significant impact on the system's safety and stability characteristics.The existing section total transfer capability calculation methods often ignore the key variable of short-circuit capacity when verifying the system's safety and stability,which may lead to calculation errors.Therefore,this paper proposes a section total transfer capability analytical calculation method based on short-circuit capacity evaluation.Firstly,the system security and stability constraints considering the short-circuit capacity are constructed.Then,the contribution index of conventional generating units to the system's short-circuit capacity is proposed,and a section total transfer capability analytical calculation method is proposed based on this index.Finally,taking a certain power grid in Northwest China as an example,the effectiveness of this method is verified through case analysis in the power system analysis and simulation program.关键词
输电断面/短路容量/开机方式/极限功率/功角稳定/暂态过电压Key words
transmission section/short-circuit capacity/start-up mode/total transfer capability/power-angle stability/transient overvoltage引用本文复制引用
刘瑶,李子恒,郑子萱,宋东徽,李小腾,张丁,任杰,谢琦..基于短路容量量化评估的断面极限功率解析计算方法[J].中国电力,2025,58(3):98-107,10.基金项目
国家自然科学基金资助项目(直流故障下大规模风电送端系统暂态电压响应机理与引导式防御机制,52277115) （直流故障下大规模风电送端系统暂态电压响应机理与引导式防御机制,52277115）
国网陕西省电力有限公司科技项目(陕北高比例新能源多直流外送型电网耦合特性及优化控制技术研究,5226KY23001Y). This work is supported by National Natural Science Foundation of China(Transient Voltage Response Mechanism and Guided Defense Mechanism of Large-Scale Wind Power Transmission System under DC Fault,No.52277115),Science and Technology Project of State Grid Shaanxi Electric Power Co.,Ltd.(Research on Coupling Characteristics and Optimization Control Technology of Multi-DC Transmission Power Grid with High Ratio Renewable Energy in Northern Shaanxi,No.5226KY23001Y). （陕北高比例新能源多直流外送型电网耦合特性及优化控制技术研究,5226KY23001Y）
