Under-frequency load shedding system and under-frequency load shedding method on basis of panoramic information of regional power grids

Abstract

The invention provides an under-frequency load shedding system and an under-frequency load shedding method on the basis of panoramic information of regional power grids. The under-frequency load shedding system comprises combining units and at least two under-frequency load shedding substations. The combining units are connected with transformer substations so as to acquire working parameters of the transformer substations; each under-frequency load shedding substation is connected with the corresponding combining unit so as to acquire the working parameters of the transformer substations; each under-frequency load shedding substation is connected with a regional under-frequency load shedding master station so as to transmit the working parameters of the transformer substations to the regional under-frequency load shedding master station and receive load shedding control instructions transmitted by the regional under-frequency load shedding maser station; each under-frequency load shedding substation is connected with intelligent interfaces of load so as to control disconnection / connection of the load according to the load shedding control instructions; power grid operation information in regions can be acquired by the under-frequency load shedding substations in the connection regions of the regional under-frequency load shedding master station, so that power grid load and load flow in the regions can be controlled in a unified and coordinated manner; the load can be correspondingly shed by the under-frequency load shedding substations in the regions when faults occur.

Description

technical field [0001] The invention belongs to the field of electric power system automation, and in particular relates to a low-frequency load shedding system and method based on panoramic information of a regional power grid. Background technique [0002] The power system is undoubtedly one of the most important parts of modern life, and a stable power system is the guarantee for people to live and work. [0003] At present, the low-frequency load shedding schemes configured in substations are all determined by the dispatching center of the regional power grid, and the low-frequency load shedding of substations is an important part of the automatic load shedding control of the regional power grid. The setting values ​​of delay and load shedding are issued by the superior dispatcher. The substation low-frequency load shedding device collects local electrical quantities, and when it detects that the system frequency has dropped, it will act round by round according to the ...

AI Technical Summary

Problems solved by technology

[0004] The existing low-frequency load shedding technology lacks adaptability when dealing with the complex and changeable power system operation mode of the future smart grid, and is prone to problems of untimely or inaccurate actions

This is because the action process of the existing traditional low-frequency load shedding scheme of "action according to the wheel" belongs to open-loop control, ignoring the change of real-time load status, which often results in inaccurate load shedding; The division of receiving rounds is only based on the principle of load importance, which is one-sided

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