AC/DC wide-area cooperative control system and method

Abstract

The invention discloses an AC / DC wide-area cooperative control system and method. The system comprises a comprehensive defense subsystem which is used for generating a frequency characteristic equation of a power system according to the frequency and power of the power system, an AC control master station which is used for acquiring a first power fluctuation value of an AC network and transmitting the first power fluctuation value to an DC coordination control master station, and the DC coordination control master station which is used for calculating a first power adjustment value needing to be adjusted according to the first power fluctuation value and the frequency characteristic equation, performing power adjustment on each DC loop based on the first power adjustment value, acquiring a second power fluctuation value of the DC network, calculating a second power adjustment value needing to be adjusted according to the frequency characteristic equation and the second power fluctuation value, and performing power adjustment on each DC loop based on the second power adjustment value. According to the AC / DC wide-area cooperative control system and method of the invention, post-fault cooperative control can be carried out on the sending end and the receiving end of an AC and DC hybrid connection regional power grid system.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to an AC-DC wide-area coordinated control system and method. Background technique [0002] Network security is related to the national economy and the people's livelihood, and has always been highly valued by academia and industry. Almost all major blackouts are not caused by a single cause. During the accident process, various time-scale components interact with each other, and multiple types of stability problems are intertwined and transformed into each other, forming a complex development and change process. In order to prevent large-scale power outages, there is a stable control method for multiple DC faults in the DC receiving-end power grid in the prior art. The specific method is to calculate the The load shedding substations in each area need to shed the load, and then according to the load shedding required, the load shedding substations in each area are cut according...

AI Technical Summary

Problems solved by technology

[0003] However, the above method only needs to cooperate with the steady control and load shedding measures to form multiple strategies, the strategies are often complicated, and the process of restoring the unit after the unit is removed is relatively slow, and the power supply recovery is slow

In addition, the above method is only for the DC sending end network, and cannot perform wide-area coordinated control on the sending end and the receiving end of a regional power grid system with AC and DC mixed connections with the outside world.

Images