P2000

Power Monitor and Control of Load Shedding

The Peak Load Controller System is designed to monitor a facility's peak power and energy usage and provide control for appropriate shedding of power loads. The P2000 Peak Load Controller accepts energy pulses from multiple utility power meters and accumulates this information for a predetermined period of time (usually 5 or 15 minutes depending on the utility). Using a special algorithm, the system predicts on-coming power demand and automatically sheds loads to prevent peak setting. When the power peak danger has passed, the system will bring the loads back on-line in a smooth and orderly fashion. Another signal from the utility demand meter is the reset pulse which marks the start of a new period and the end of the previous period. In the event of the loss of the utility reset pulse, the processor will use its own internal clock to establish the correct period. Other energy/power sources may also be monitored by the P2000 via pulse inputs, serial communications or analog signals. This allows an overall view of production or consumption within distinct areas of operation.

For utilities that offer Time-of-Use rates the Peak Load Controller will control to On Peak and Off Peak Set Points which are automatically invoked at the appropriate times predetermined by the utility, (typically 7:00 AM and 11:00 PM). The system will also switch to Off Peak control on weekends and holidays if so designated. The On Peak and Off Peak set point peak power values are also selectable by the user. The Peak Load Controller is capable of providing shed control signals at common AC/DC voltage and current levels, either as parallel logic outputs or using serial communications.

Many power utility rate structures have been implemented in the P2000, including Discount Demand Service (DDS), Real Time Pricing (RTP), Real Time Pricing 2 (RTP2), Curtailable Power, and Surplus Power.

DEIBI^® Benefits: Large amounts of data are stored in non-volatile RAM files to provide daily and monthly reports. The storing of time and date are a necessity to enable the synchronizing of demand and energy values with the utility. The numerous algorithms used to predict peaks, calculate appropriate action and accumulate energy/power information are easily accommodated using the powerful floating point math capability of DEIBI^® BASIC. Many serial connections are often required in P2000 systems for retrieving power/energy values from meters, transferring data to information systems computers, remote links, terminal interfaces, and printers.