Plant-station direct-current storage battery reliability regular automatic detection and early warning method

Abstract

The invention relates to a plant station direct-current storage battery reliability regular automatic detection and early warning method, and belongs to the technical field of power equipment performance detection. The method comprises the steps: when set detection time is up, reducing the output voltage of a charging module to a given voltage, the duration time being given time, and the given time being longer than the longest time of a protection action; comparing the storage battery terminal voltage with an alarm voltage, and judging whether the storage battery terminal voltage is smaller than the alarm voltage; and if the voltage of the storage battery end is not less than the alarm voltage within the given time, not sending an alarm signal, otherwise, sending the alarm signal and stopping detection. According to the method, the hidden danger that the independent power supply capacity of the storage battery pack is insufficient can be found in time, operation and maintenance personnel are reminded to take targeted storage battery maintenance measures, the hidden danger of protection and switch refusal caused by unreliable direct-current power supply is reduced, the reliabilityof a direct-current system is improved, and the blank of the technology in the industry is filled.

Description

technical field [0001] The invention belongs to the technical field of power equipment performance detection, and in particular relates to a regular automatic detection and early warning method for the reliability of a DC storage battery in a plant. Background technique [0002] The DC system battery is an important secondary equipment in the power system. Its main function is to provide working power for the secondary equipment and circuit breaker operating mechanism of the whole station when the AC system failure causes the charging device to be locked or the charging device itself fails to ensure that the equipment normal work. [0003] The reliability testing of batteries in existing DC systems is generally carried out through battery nuclear capacity verification. The nuclear capacity work is carried out every 1 to 2 years, and the test period is relatively long. Only through the nuclear capacity test can it be found that within this time window, if a system fails, it ...

AI Technical Summary

Problems solved by technology

[0003] The reliability testing of batteries in existing DC systems is generally carried out through battery nuclear capacity verification. The nuclear capacity work is carried out every 1 to 2 years, and the test period is relatively long. Only through the nuclear capacity test can it be found that within this time window, if a system fails, it may cause the charger to be locked, the DC system to lose voltage, and then cause protection or switch refusal, which seriously threatens the safe and stable operation of the power system.

Therefore, it is an urgent problem to adopt a short-term, simple and effective method of periodically testing the reliability of the battery in the DC system of the substation to timely discover the hidden danger of battery reliability degradation during the two nuclear capacity tests.

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