Extra-high voltage DC (Direct Current) power transmission system real-time digital simulation model

Abstract

The invention relates to an extra-high voltage DC (Direct Current) power transmission system real-time digital simulation model which comprises a primary system real-time digital simulation model and a secondary system real-time digital simulation model. The primary system real-time digital simulation model comprises converter stations and a DC power transmission line; the converter stations are arranged at both ends of the DC power transmission line; the secondary system real-time digital simulation model comprises a converter station control system and a converter station protection system; and the converter station control system and the converter station protection system are connected with the converter stations and are used for controlling and protecting operation of the converter stations. By control and protection of the converter station control system and the converter station protection system on the converter stations, the condition that after an AC (Alternate Current) system goes wrong, a plurality of loops of DCs easily go wrong at the same time and a multiple-loop DC fault is easy to cause is avoided and impact on the AC system in the recovering process is also avoided.

Description

technical field [0001] The invention relates to an electric power simulation model, in particular to a real-time digital simulation model of an ultra-high voltage direct current transmission system. Background technique [0002] At present, the East China Power Grid presents the obvious characteristics of multi-infeed DC and large receiving-end power grids. However, the area of ​​East China is small, the grid structure is compact, and the electrical distance between multiple DC circuits is relatively short. After the AC system fails, multiple DC circuits are likely to fail at the same time. Multiple DC faults and their recovery process will have a greater impact on the AC system. This interaction between AC and DC poses a huge challenge to the safe operation of the receiving power grid. At the same time, with the UHV AC interconnection among major regional power grids, the receiving end power grid in East China will show new characteristics of AC-DC hybrid transmission, and ...

AI Technical Summary

Problems solved by technology

[0002] At present, the East China Power Grid presents the obvious characteristics of multi-infeed DC and large receiving-end power grids. However, the area of ​​East China is small, the grid structure is compact, and the electrical distance between multiple DC circuits is relatively short. After the AC system fails, multiple DC circuits are likely to fail at the same time. Multiple DC faults and their recovery process will have a greater impact on the AC system. This interaction between AC and DC poses a huge challenge to the safe operation of the receiving power grid.

At the same time, with the UHV AC interconnection among major regional power grids, the receiving end power grid in East China will show new characteristics of AC-DC hybrid transmission, and the scope and degree of AC-DC interaction will be further expanded, and this problem will be solved in UHV. In the initial stage of communication and networking, it may be more prominent

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