Study On The Application Of The On-line Monitoring Device For The Internal Resistance Of Instantaneous DC Discharge Measurement

At present,the society is more and more dependent on the subway,and the demands of punctuality,safety and reliability are getting higher and higher.Furthermore,it puts forward higher requirements for the reliability of the power supply system and communication signal.In the subway system,the storage battery plays an important role in the system.It is not only a powerful guarantee for the protection and control of the subway power supply system,but also a guarantee for the safe operation of communication,signal and comprehensive monitoring network.As far as I know the nanchang subway at present about the use of valve control type aluminum acid battery status,its parameters by the battery performance and use method,the influence of maintenance means not accurate enough reason,lead to the service life of the battery is far short of the level of free maintenance,some even use cycle is short of 1 to 2 years,nanchang has been affected by the safe operation of the metro power supply system.Due to the low maintenance and management of the battery in the rail transit industry,the manual maintenance management is the main one,which can not effectively predict the battery status.In-depth study based on the dc discharge method resistance test battery integration of the application of on-line monitoring device,improve the rail transit industry help operations staff in a timely manner to understand the battery working state,found behind the battery,has a great value and significance.In this paper,the main basic theories of battery and maintenance are summarized,and the current status of battery maintenance in nanchang subway is analyzed,and the key parameters of battery performance are put forward: battery resistance.After through the analysis of advantages and disadvantages for the methods of existing internal resistance testing technology,summarizes the stationary internal resistance online monitoring,a Instantaneous DC discharge measurement method,the advantages of Instantaneous DC discharge measurement is proposed based on a stationary storage battery internal resistance testing device in the rail transit industry application solutions.With a view to greater application value.