应用柔直技术改善220kV分区电网性能的研究  被引量:3

A Study on the Application of VSC-HVDC to Improve the Performance of 220kV Partition Grid

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作  者:马立民 文俊[1] 王书杰 牛宇昆 韩民晓[1] MA Limin;WEN Jun;WANG Shujie;NIU Yukun;HAN Minxiao(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区:[1]华北电力大学电气与电子工程学院,北京102206

出  处:《电网与清洁能源》2021年第10期83-90,共8页Power System and Clean Energy

基  金:国家重点研发计划智能电网技术与装备重点专项(2016YFB0900600)。

摘  要:对应用柔直技术改善220 kV分区电网性能进行了研究,对220 k V分区电网进行静态安全性分析,考虑线路负载率和节点电压等指标,找出影响分区供电可靠性的因素;在明确薄弱环节后,进行柔性直流分区互联系统的设计,依据N-1故障的严重程度进行柔直落点设计,之后设计柔直电压等级。通过灵敏度计算分区电网有功功率和无功功率需求,设计柔直容量及控制策略。通过PSD-BPA验证所提方法的有效性,计算结果表明:柔直互联系统投入后,能够缓解重载分区供电压力,实现分区供电能力最大化,故障时可以进行无功支撑,稳定分区电网电压。In this paper,the application of flexible direct current to improve the performance of 220 kV partition grid is studied,and the static security analysis is carried out for the220 kV partition grid,and the factors affecting the partition grid power supply reliability are found by considering the line load rates and nodes voltage.After identifying the weak parts,the flexible DC partition interconnection system is designed.According to the severity of N-1 fault,the voltage source converter(VSC)drop points are designed,and then the VSC voltage level is designed.The active power and reactive power demands of the partition grid are calculated through sensitivity,and then the capacity and control strategy of VSC are designed.The validity of the proposed method is verified by PSD-BPA.The calculation results show that the flexible direct current interconnection system can relieve the power supply pressure of the large load partition and maximize the power supply capacity of the partitions.In case of a fault,reactive power support can be carried out to stabilize the power grid voltage.

关 键 词:分区电网 柔性直流输电 供电能力 互联系统 静态安全性分析 

分 类 号:TM721[电气工程—电力系统及自动化]

 

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