A Microprocessor-Controlled System Battery Plant: A New Concept in Central Office Power

This paper describes the design features, architecture, and benefits of a modular Microprocessor-Controlled System (MCS) battery plant. The Microprocessor-Controlled System battery plant is a computer-based energy system that provides efficient dc power for telephone central office telecommunications equipment. The MCS battery plant uses a microprocessor-based controller and associated firmware in a flexible, modular hardware design to provide a systems solution for reducing energy, maintenance, training, engineering, and capital expenses. The MCS controller executes an energy efficiency algorithm that matches the number and capacities of its controlled ferro-resonant rectifiers to the actual current requirements of the office load. This enables the MCS controller to maintain the plant at optimal efficiency without sacrificing reliability or creating nuisance alarms. Diagnostic routines allow the controller to test and evaluate itself and many of the other components of the battery plant. Plant status and diagnostic information are displayed on the controller front panel or a remote terminal in user-friendly language. A remote terminal makes it unnecessary to visit the battery plant location except for maintenance and repair. The flexible, modular design of the MCS battery plant allows a wide range of current capacities and configurations. Therefore, the plant can begin small and, as demands require, capacity and hardware and software features can be added in cost-effective increments. This add-on capability and the ability to remotely access accurate plant operating data eliminate the guesswork that leads to excess capacity and reduced operating efficiency.