(1) Normal operation mode
The power supply principle of the power supply is when the main electricity is normal, the machine will convert the electricity electricity electrical electrical electrical electrical power to direct current, and then charge the battery to use electric power interruption; it is emphasized that the continuous electric system is not power outage. It will operate, as in the event of an excessive low or too high, instant surge, etc., it is sufficient to affect the normal operating of the equipment, the continuous electricity system will operate, and provide a stable and clean electric power. When the main electricity is supplied normally, the city is divided into two circuits simultaneously, one is to charge the battery pack via the charging circuit, the other is a rectifier circuit, as an input of the inverter, then pass through The conversion of the inverter provides power to the load; thereby
(2) Battery work mode
Once the city is abnormal, the direct current stored in the battery is converted to an alternating current. At this time, the input of the inverter is supplied by the battery pack, and the inverter continues to provide power, and the load continues to use, and achieves the power of electricity. The power source of the UPS uninterruptible power system is the battery, and the capacity of the battery is limited, so that the power system is not allowed to supply the power of the main electricity, so regardless of the large capacity constant electricity system, in the state of its full load The time it is power supply is limited, and to extend the discharge time, you must purchase a long-term constant electricity system.
(3) Bypass operation
When online UPS overload, bypass command (manual or automatic), the inverter is overheating or machine failure, the UPS generally converts the inverter output to the bypass output, that is, the main power supply directly. Due to bypass, the UPS output frequency phase needs to be the same as the market, so that the same step technology is used to ensure that the UPS output is synchronized with the mains. The bypass switch two-way thyristor is used in parallel working mode, solves the problem of bypass switching time, truly uninterruptible switching, complicated control circuitry, generally applied to medium power UPS. If you are overload, you must reduce the load, otherwise the bypass shorter will automatically turn off the output.
(4) Bypass maintenance
When the UPS is maintained, the normal power supply of the load device is guaranteed by manual bypass. When the maintenance operation is completed, the UPS is restarted, and the UPS is turned to run normally. The very low maintenance rate, MTTR is 150,000 hours, greatly increasing the UPS uninterruptible power availability.
From an application perspective, the change in UPS function has undergone three phases. The stage is hardware protection, and the hardware system for protecting the load device will not be damaged due to the power abnormality or the power supply suddenly interrupted; the second phase is data protection. When the market is interrupted, the data information to protect the load device will not damage due to sudden power outages or Lost; the third stage is system availability protection, in the normal, abnormal abnormalities, or even interruptions, to ensure that the key loads behind the back are high quality power supply. The three stages of changes are promoted with social development and technological advancement, and people will continue to increase their demand for production systems. The stage highlights the last century and 1980s of the UPS buddt, the second phase is prevailed in the mid-1990s, and the third stage has become more and more important from the late 1990s, until today’s system availability is still It is one of the important indicators of the power plant requirements of the data center, factory, hospital, and rail transit on UPS power supply system requirements.
In order to enhance system availability, a variety of improvement programs are proposed, for example, in the UPS combination scheme, the single machine is used in series hot backup, and then go to parallelrendy, dual bus, distributed redundancy, etc., in terms of UPS selection, Module machine that is hotly swapped by a tower-type one-well-swappable-swappable-swap-replacing; in terms of supporting peripherals, select higher performance batteries, add more intelligent and user-friendly monitoring management systems, introducing multiple power supplies and configuring ATS (Automatic Transfer Switching Equipment Automatic Conversion Switch), etc. Among them, the UPS is currently more common in cooperation with the ATS device, and there are many problems, which are mainly discussed in this application.
Disclaimer: Reprinted this article is for the purpose of passing more information. If there is a source labeling errors or infringes your legitimate rights and interests, please hold the right to contact this website, we will be timely corrected, deleted, thank you. Email address: 3205845866@qq.com