Method for controlling storage battery in power system

Abstract

The invention discloses a method for controlling a storage battery in a power system. The method comprises firstly, when a power system power source supplies power to a device in a main station, detecting whether there is a worker in the main station; if so, disconnecting an automatic turn-on device connected to the power system power source; supplying power to the device in the main station through a battery pack in the main station; finally, if there is no worker in the main station, supplying power to the device in the main station through the power system power source. When the control method of the present invention detects that there is a worker in the main station, it indicates that the device is required to be overhauled or replaced. The worker can completely power off the device in the main station just by operating the automatic turn-on device at the output end of the battery pack according to the actual situation. Thus, the worker can power off the device in the main station, facilitate subsequent maintenance, and effectively prevent problems such as low efficiency and misoperation caused by multi-step operation.

Description

Technical field [0001] The present invention relates to the technical field of power systems, in particular to a control method applied to storage batteries in the power system. Background technique [0002] Whether it is power communication, closing power supply, unattended substation, UPS power supply system, once the battery fails, it will seriously affect the safe and stable operation of the power grid. At present, the battery packs of power systems are mostly formed by connecting 2V or 12V cells in series. The battery deterioration rate is too fast, and the actual service life is much shorter than the theoretical design life. The longer the battery string, the faster the battery deterioration rate. This situation makes the performance of the battery uncontrollable and can only be replaced if there is a problem. This undoubtedly brings huge cost investment to operations, and there are great security risks. [0003] The battery deterioration rate is too fast, and the actual se...

AI Technical Summary

Problems solved by technology

The battery degrades too fast, and the actual service life is far shorter than the theoretically designed life. The longer the battery string, the faster the battery degrades. This situation makes it impossible to control the performance of the battery. We can only replace it if there is a problem. This will undoubtedly bring huge cost investment to the operation, and there is a great potential safety hazard

[0003] The battery degrades too fast, and the actual service life is far shorter than the theoretically designed life; the longer the battery string, the faster the battery degrades; the maintenance workload is heavy, and a simple and reliable maintenance idea is urgently needed; the battery has self-discharge phenomenon, rectification The constant floating charge voltage output by the module is loaded on both ends of the battery pack, forming a circulating current to supplement the self-discharge of the battery, but the self-discharging current of each battery is different, and the circulating current formed by the rectifier is the same for each battery, self-discharging The capacity of a single battery with a large current will inevitably drop rapidly (the self-discharge current is greater than the rectifier circulating current). This kind of small current will self-discharge for a long time without the possibility of charging, which will inevitably lead to battery vulcanization, increase in internal resistance, and decrease in capacity. The difference in floating charging gradually widens, and the greater the difference of each single battery, the faster the deterioration in the constant voltage floating charging state. This vicious cycle leads to rapid deterioration of the battery

[0004] A large number of battery management systems and methods have appeared in the prior art, which can generally control and monitor the operation of the battery very well, and make corresponding treatments for different working conditions of the battery. However, if the existing systems or methods work It takes at least two steps for personnel to enter the main station and completely disconnect the power supply of the main station equipment. The first step is to disconnect the automatic closing device at the power input end of the power system, and the second step is to disconnect the automatic closing device at the output end of the battery pack power supply. Only then can the power supply of the battery pack be completely cut off

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