Layered and distributed AC/DC (alternating current/direct current) coordination control system, and layered and distributed AC/DC coordination control method

Abstract

The invention relates to a layered and distributed AC / DC (alternating current / direct current) coordination control system, and a layered and distributed AC / DC coordination control method. The system comprises AC / DC substations, coordination control main stations, and a coordination control central station, wherein the AC / DC substations acquire the operating state information of an AC transmission line and a DC transmission system and transmit the operating state information to the coordination control main stations, and receive coordination control commands sent from the coordination control main stations; the coordination control main stations calculate the total DC quantity required to be adjusted and perform power distribution for the DC substations, and distribute the power to the DC substations requiring regulation and control and upload the total DC adjustable quantity, the operating mode and the corresponding strategy table information to the coordination control central station; the coordination control central station collects the information uploaded by the coordination control main stations and receives commands from a control center and an on-line application, and switches the current strategy of a coordination control algorithm in the coordination control main stations, and starts or quits the coordination control function. The layered and distributed AC / DC coordination control system, and the layered and distributed AC / DC coordination control method can perform coordination control of the AC / DC paralleling operation power grid to improve the safe and stable characteristic of the system.

Description

Technical field: [0001] The invention relates to the field of large power grid security, and more specifically relates to a layered distributed AC-DC coordinated control system and control method. Background technique: [0002] With the construction of the UHV AC synchronous power grid and EHV / UHV DC transmission projects, the State Grid has gradually formed a complex AC system characterized by parallel operation of AC and DC, centralized power supply / converter stations at the sending end, and multi-infeed DC at the receiving end. DC power grid. The formation of the AC-DC hybrid operation grid has brought new challenges to the security and stability control of the power system, and it also provides the possibility of using the AC-DC coordinated control method to improve the security and stability of the grid. [0003] Compared with AC transmission, one of the characteristics of HVDC transmission is that the transmission power is highly controllable and fast and flexible. I...

AI Technical Summary

Problems solved by technology

[0006] For example, in the planned Sanhua Power Grid, the East China Power Grid receives power through two circuits of UHV AC lines and multiple circuits of EHV / UHV DC lines. For the downtime failures that occur within the East China Power Grid, without considering DC coordinated control, only Capable of transferring power through UHV AC channels

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