Analog Self-Checking Logic in Control and Protection  System for Tianzhong UHVDC

doi:10.3969/j.issn.1000-7229.2015.05.013

Abstract

Abstract:

Tianzhong UHVDC project is the first UHVDC transmission system with using domestic DC control and protection technology. The operation reliability of DC control and protection system is very important to the safe and stable operation of the UHVDC project. Analog is the source of DC control and protection system, its correctness determines the correctness of control and protection logic implementation and affects the operation reliability of DC transmission system. Taking Zhongzhou converter station in Tianzhong UHVDC project as an example, the self-checking logic of DC control and protection system was analyzed in detail in order to provide references for the design, construction and maintenance of the UHVDC transmission project. Firstly, the analog configuration of DC control and protection system in Zhongzhou converter station was introduced. Secondly, the self-checking logic of analog using in DC control or DC protection was respectively analyzed in detail. Then, according to the engineering debugging problems, this paper pointed the shortcomings of the self-checking logic for existing analog. Finally the suggestions and comments were proposed to improve the self-checking logic of analog.

Key words: Tianzhong UHVDC project, control and protection system, analog, self-checking logic

CLC Number:

TM 862

ZHANG Guohua, WANG Sen, LIAO Huilian, LIAO Wenfeng. Analog Self-Checking Logic in Control and Protection System for Tianzhong UHVDC[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(5): 78-83.

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Analog Self-Checking Logic in Control and Protection System for Tianzhong UHVDC

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