1. System for In-house Dispatching of PV Power across Multiple Sites
Hitachi has developed a technique for estimating electricity generation in real time using a mathematical model of photovoltaic (PV) generation that is intended to encourage wider adoption of in-house electric power dispatching systems for the low-cost and reliable procurement of green electricity. Factors such as the weather make the output of PV generation highly variable, meaning that the contracted level of power supply usually needs to be set lower than the actual generation capacity. It is estimated that the new technique will be able to increase contracted power by 30% compared to past practice by estimating actual PV generation (available power) in one-minute intervals and coordinating operation with battery control.
To demonstrate the operation of the system, PV generation has been installed at the Advanced Research Laboratory in Hatoyama-machi, Saitama Prefecture and work started on implementing a system for the in-house dispatch of this electric power to the Central Research Laboratory in Kokubunji City, Tokyo. Along with using this demonstration to trial the reliable and highly efficient dispatch of PV electric power in the MW range, there are also plans to expand the system into one for the in-house dispatch of PV power across multiple sites. By doing so, it will deliver both economic and environmental value by minimizing volatility and making full use of PV generation across many sites where the process of electrification is ongoing.