10KV station electric control system of convertor station adopting selecting 2 from 3 logic

Abstract

The invention discloses a 10KV station electric control system of a convertor station adopting selecting 2 from 3 logic. Two PS830 boards are added, three PS830 boards are utilized to concurrently process and jointly realize a spare power automatic switching function and an operation interlocking logic function; the selecting 2 from 3 logic is added in PS853 programs of an ASI host machine and a switching value output board, i.e. the electric control system can be exported when at least two of three integrated circuit boards sends out same instructions. The damage of any one of the three PS830 boards can not lead to switch fault trip or refusing trip, the 10KV control system can be ensured to run safely and stably without being influenced by the faults of single element. The electric control system has the advantages of convenient use, safety and the like.

Description

Technical field [0001] The invention relates to a 10KV station power control system for a converter station, in particular designed for the opening and closing operation interlocking and standby automatic switching control of a 10KV station power switch in a high-voltage direct current transmission converter station. Background technique [0002] The station power system of the HVDC converter station provides power for the main circulating pumps, cooling fans and other loads. Due to the importance of the DC transmission system in the power grid, the reliability requirements of the station power system are very high, so the 10KV system is generally The three-circuit incoming line is connected to the three sections of busbars A, B, and C. A bus and B bus independently supply power to the load. figure 1 Shown) [0003] When the power of A and B is lost, the standby automatic switching system should be able to automatically close the corresponding bus tie switch, and continue to supply...

AI Technical Summary

Problems solved by technology

[0007] In the above system, the ASI host is only responsible for human-computer interaction, and is used to provide operators with an interface to monitor equipment status and issue instructions. If a failure occurs, it will not affect the operation of the 10KV system. The I / O boards correspond to different switchgears, and it is impossible for all Failures occur at the same time. If one board fails, it will only affect the corresponding switch and not affect the operation of the entire 10KV system. However, as the core component of the PS830 board, once a software and hardware failure occurs, it is very likely to cause a power outage for the entire station.

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