Low-frequency and low-voltage load-reducing control method based on multi-agent technology

Abstract

The invention provides a low-frequency and low-voltage load-reducing control method based on a multi-agent technology, which comprises two processes carried out simultaneously, wherein, in process 1, a local reaction layer triggers a device to act and implement load-shedding control after judging the device meets an action condition according to the measured state quantity information in real time such as local voltage, frequency and the like; and the process 2 comprises the following steps: 1. the local reaction layer uploads the local state quantity information and the actual load-shedding capacity of the device to local coordination layers; 2. the local coordination layers upload a data analysis result to sub-region coordination layers; 3. the sub-region coordination layers calculate local deloading and weighting coefficients for the local coordination layers, and meanwhile upload an information analysis result to a total-network coordination layer; and 4. the total-network coordination layer gathers information uploaded by the sub-region coordination layers, calculates sharply reduced indexes of power-receiving power of a power grid and sub-region deloading and acceleration coefficients for the sub-region coordination layers, sends the indexes and the coefficients to the sub-region coordination layers, and finally sends to the local coordination layers from the sub-region coordination layers.

Description

technical field [0001] The invention belongs to the field of power system stability control. More precisely, the invention relates to a new control method for realizing automatic low-frequency and low-voltage load shedding of a power grid based on multi-agent technology. Background technique [0002] The automatic load shedding control of the power system is an important technical means to prevent the power grid, especially the receiving end power grid, from having stability damage and large-scale blackout accidents after being subjected to extremely severe disturbances. [0003] After a sudden power shortage occurs in the power grid, in order to ensure that the remaining operating load capacity is roughly equivalent to the operating generating capacity, and quickly restore the voltage and frequency of each node in the power grid to the rated value, an automatic load shedding control device must be configured. [0004] The existing low-frequency and low-voltage load shedding...

AI Technical Summary

Problems solved by technology

Analysis and research on a large number of actual systems have shown that the above-mentioned practices often lead to excessive device actions, resulting in unnecessary economic losses

[0006] Obviously, the traditional low-frequency and low-voltage load shedding control method does not take into account the spatial distribution of the voltage dynamics or frequency dynamics of different nodes of the disturbed system in the real-time control algorithm, and cannot adjust the load shedding control strategy according to the actual working conditions. The danger of under- or over-control, which may have serious consequences for grid security or economic operation

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