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CNAcrel EMS3.0 Help clients Realizing Demand Monitoring and Management
Explanation of the Concept of Demand
Demand Interval: It is typically 15 minutes, but may vary in different regions.
Demand: The average value of power over this period, measured in kilowatts (kW).
Sliding Window Time: It is typically 1 minute. This means that every 1 minute, the average power (i.e., the demand) for the preceding 15-minute period is recalculated.
Maximum Demand and Its Time of Occurrence: It generally refers to the highest demand value recorded within a month. The time of occurrence is the end point of the demand interval and includes the month, day, hour, and minute.
Demand Monitoring Capability
The demand monitoring function of our meters is essentially tied to the optional F-function. If the F-function is selected, demand monitoring is included. Take Acrel APM5 panel power meter for example:
The Logic Behind Demand Management
Essentially, it involves reducing power, which means decreasing the number of high-power loads operating simultaneously and distributing their use across different time periods.
Case Study
Taking Malaysia as an example, local regulations stipulate a demand interval of 30 minutes and a sliding window time of 1 minute. Additionally, a unique requirement is the implementation of a weekly time-of-use (TOU) tariff, which differentiates between weekdays and rest days (weekends). The tariff periods are divided into peak and off-peak. The specified demand requirement refers to the demand recorded during the peak periods. Currently, a special version of the APM520 meter has been programmed to handle this "tariff-based demand" calculation. The gateway and platform can be flexibly configured according to user needs.
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