10000MW特高压直流工程受端分层接入交流电网方式下直流控制系统研究

发布时间：2018-02-12 17:39

本文关键词： 特高压直流分层接入方式控制系统稳定控制电压平衡控制　出处：《电力系统保护与控制》2015年18期 　论文类型：期刊论文

【摘要】：对于受端分层接入1 000 k V和500 k V交流电网的新型电网结构方式,传统的特高压直流控制系统已经不再适用,需要重新研究设计。在对这种新型电网结构方式的特点进行了分析后,给出了与之相适应的直流控制系统整体结构和功能配置。受端同极的两个串联阀组接入不同的交流电网,引起的最大难题是阀组间电压的不平衡,为从控制功能上解决阀组间电压实时平衡的问题,提出一种利用受端串联阀组中点电压测点的双阀组电压平衡控制策略。最后通过RTDS建模试验验证了控制策略的正确性,为2015年电网公司即将实施的分层接入特高压直流工程提供了完整的控制保护解决方案。
[Abstract]:The traditional UHV DC control system is no longer suitable for the new type of power network structure which is connected to the 1 000 kV and 500 kV AC power grid by layers at the receiving end, and the traditional UHV DC control system is no longer applicable. After analyzing the characteristics of this new type of power network structure, the overall structure and function configuration of the DC control system are given. Two series valve groups with the same terminal are connected to different AC power grids. The biggest problem caused by this problem is the imbalance of the voltage between the valve groups. In order to solve the problem of real-time voltage balance between the valve groups from the point of view of the control function, A voltage balance control strategy for double valve groups using the midpoint voltage measurement points of the receiving end series valve group is proposed. Finally, the correctness of the control strategy is verified by RTDS modeling test. In 2015, it provides a complete control and protection solution for the layered access UHVDC project to be implemented by grid company in 2015.
【作者单位】：许继电气股份有限公司;
【分类号】：TM721.1

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