Power grid-transformer cooperative overload control method based on transformer safety margin

Abstract

The invention particularly relates to a power grid-transformer cooperative overload control method based on transformer safety margin. The method comprises the following steps: acquiring monitoring information of a transformer and a control object in a target area; load clustering is realized based on monitoring information of a control object, and a transformer power supply area to which a load point belongs is identified; based on the regulation and control emergency degree of the operation state, the operation state of the transformer is divided into corresponding safety state levels; calculating the safety margin of the transformer based on the monitoring information of the transformer, and evaluating the safety state level of the current operation state of the transformer according to the safety margin of the transformer; and adopting a corresponding regulation and control strategy based on the safety state level of the current operation state of the transformer, and generating a corresponding regulation and control scheme according to the regulation and control strategy. According to the power grid-transformer cooperative overload control method, the operation safety of the transformer can be ensured, and the overload potential of the transformer is fully excavated to provide support for system regulation and control, so that the overload protection effect of the transformer is improved.

Description

technical field [0001] The invention relates to the technical field of safe operation of electric power systems, in particular to a grid-transformer coordinated overload control method based on a transformer safety margin. Background technique [0002] Power transformers are critical and expensive core equipment in power transmission networks, playing an important role in power transmission and voltage conversion. In the context of continuous growth in power demand, the replacement and expansion of existing transformers or the installation of new transformers in substations are usually limited by the dual factors of cost and space. In the context of "carbon peaking, carbon neutrality", "electric energy substitution" and "new energy-based new power system construction", the penetration rate of clean power systems and renewable energy continues to increase, and emerging loads such as electric vehicles continue to Connected to the power grid, these factors make the load fluctu...

AI Technical Summary

Problems solved by technology

However, the existing overload control methods are more about ensuring the safety of the equipment, without considering the impact of the protection action on the power grid. For the power flow transfer overload in an emergency, it is often blocked in order to avoid the chain trip caused by the overload protection malfunction. Load Measures Eliminate Transformer Overload

However, the existing method cuts the load prematurely when the transformer has a safety margin, sacrificing the continuity of customer power supply to ensure the safety of the system and equipment operation, and fails to fully exploit and utilize the overload capacity of the transformer to provide support for power grid regulation

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