Requirements and Analysis
A power plant is a highly automated special production enterprise, and automated production equipment relies on the safe and stable operation of the power supply system. In modern power plants, the DCS control system of large capacity unit generators, including various thermal automatic devices, such as assembled instruments for automatic regulation, turbine electromechanical hydraulic digital regulation devices, boiler interlocking and safety monitoring systems FSSS, turbine monitoring instruments (TSI), coordinated control systems (CCS), etc., requires a reliable power supply. This power supply requires a reliable power supply, whether in the event of plant power interruption or grid failure of the unit itself, The power supply should not be interrupted, which requires not only the emergency power supply that can safely shut down the unit in large capacity units, but also an AC uninterrupted power source that provides high power quality and uninterrupted power supply for control, monitoring devices, and post accident state parameter recording devices.
DCS system power protection scheme:
The power dedicated power supply adopts a 1+1 redundant power supply system, which uses advanced technology to manufacture industrial grade AC protection power supply for the application load and environment of the power system. It can fully meet the requirements of power supply reliability for loads such as the power DCS system.
Advantages of the plan:
1) A professional UPS tailored for the power industry, adapted to the harsh power grid environment within the industry, not only meets the load needs of the power industry, but also eliminates the need for users to worry about three-phase imbalance of the load.
2) The 1+1 redundant parallel operation mode adds another safety lock to the already reliable power supply system, meeting the extreme needs of users in the power industry for high reliability indicators of UPS.
3) By fully utilizing the 220V/110V large capacity battery pack in the power industry, the backup time of UPS can be maximized, and the installation space and initial investment of the battery pack can be saved.
4) Select a bypass isolation transformer to achieve complete isolation between input and output, and ensure that the zero to ground voltage of the output is less than 1V.
5) Rich dry contact monitoring signals can be incorporated into the power plant's own DCS monitoring system; Report any issues in a timely manner to facilitate real-time monitoring of UPS by duty personnel.