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Hitachi

Community Energy Management System

Stabilizing the distribution networks connected to a large amount of solar power

Summary

Stabilize distribution network by controlling the variation of distribution system voltage caused by the introduction of a large amount of solar power

Feature/Advantage

  • High-voltage control system (Distribution voltage stabilization system) controls voltage using LRT, SVR, SVC, PCS and storage battery in high-voltage network and cooperating with multiple low-voltage control systems.
  • High-voltage control system indicates specified power flow at the connection point to low-voltage network.
  • Low-voltage control system contributes to control voltage in high-voltage network complying with the indicated power flow, and keeps proper voltage using storage battery, thermal storage device and PCS in low-voltage network.
  • Forecasted demand and solar power generation are applied to the advance control.

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DSM:Demand Side Management
PCS:Power Conditioning System
LDC:Line Drop Compensator
SVC:Static Var Compensator
LRT:Load Ratio Control Transformer
SVR:Static Voltage Regulator