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Central load dispatching center
Large amounts of electrical energy is difficult to be stored in its nature, that is why production and consumption of electricity must be balanced always in time and quantity to maintain high quality power supply. The Energy Management System (EMS) is necessary to establish the operation schedule and remote control with the capability of controlling voltage and power flow properly against the current which varies from hour to hour, scheduling outage of power system equipment such as power transmission lines and transformers for the inspection and the repair, and taking measures in case of contingency.
Hitachi supports these EMSs in all levels from entire area system level such as central load dispatching center to regional level and distribution level also in all service range from supply and demand operation and power dispatching operation to distribution operation.
A huge electric power grid is structured in hierarchy and distributed in a wide area to maintain high reliability. This technology provides optimum and autonomous supervisory control of the system by dividing it into three parts: hierarchy, region and function.