计及直流电网线路损耗的直流潮流控制器安装位置选择

李国庆; 龙 超; 陈洪涛

引用本文:	李国庆,龙超,陈洪涛.计及直流电网线路损耗的直流潮流控制器安装位置选择[J].电力系统保护与控制,2016,44(16):43-49.
	LI Guoqing,LONG Chao,CHEN Hongtao.Installation position selection of DC power flow controller considering the line-loss of DC grid[J].Power System Protection and Control,2016,44(16):43-49

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计及直流电网线路损耗的直流潮流控制器安装位置选择
李国庆¹,龙超¹,陈洪涛²
(1.东北电力大学电气工程学院，吉林吉林 132012; 2..国网吉林省电力公司松原供电公司，吉林松原 138000)

摘要:

多端柔性直流电网内部潮流的分布控制遵循N-1准则，即换流站可独立控制的支路数为换流站个数减去一。当直流电网支路数远多于N-1时会有多条支路不可控，而且换流站功率变化时也会影响到直流电网内部的潮流分布，这时可通过直流潮流控制器增加潮流控制自由度与换流站协调配合，保证支路潮流完全可控。验证了直流潮流控制器及换流站功率改变对电网内部潮流分布的影响，并验证了潮流控制器可以扩大直流系统换流站功率运行区间的作用。最后以四端五节点的直流电网为例，综合考虑各支路的安全裕度和直流系统的线路损耗，对比分析得出直流潮流控制器最优安装位置。

关键词: 多端柔性直流电网直流潮流控制器线路损耗安装位置

DOI：10.7667/PSPC151510

分类号:

基金项目:国家自然科学基金项目(51377016)

Installation position selection of DC power flow controller considering the line-loss of DC grid

LI Guoqing¹,LONG Chao¹,CHEN Hongtao²

(1. School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China;
;2. Songyuan Power Supply Company, State Grid Jilin Electric Power Company, Songyuan 138000, China)

Abstract:

The power flow control capability in a multi-terminal HVDC system follows N-1 rule, it means that the number of controllable branch equals to converter number minus one. If the number of branches in the DC grid are far more than N-1, it is difficult to ensure all branches controllable, and the change of converter power will also affect the distribution of DC power flow. The introduction of DC power flow controller can approve the power flow control freedom, cooperate with converters and guarantee all branches to be controllable. The influence of DC power flow controller and the change of converter power on the distribution of power flow in DC grid and the function to expand the region of operation for the converters in DC grid are verified. Finally, a meshed VSC-HVDC grid with 4 terminals and 5 branches is used to analyze the optimal location of DCPFC considering the safety of branches and the line-loss of the DC grid. This work is supported by National Natural Science Foundation of China (No. 51377016).

Key words: multi-terminal HVDC system DC power flow controller (DCPFC) line loss installation position

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