Renewable Energy Storage System (ESS)

ESS

New Renewable Energy Storage : Introduction

New renewable energy like wind power and sunlights are uncertain in the quantity of generation/output.

Wind Power Generation(WP): The output changes by the rapid change and the uncertainty of wind power. The unstable frequency caused by output change causes the falling-off in quality of the electric power system.
Solar Power Generation(PV): The range of output changes greatly in cloudy days, and it becomes the reason for the change of frequency of the electric power system.

Independent Driving Type: Self consumption model using batteries that store generated electric power along with diesel generator.
System-Connected Type: Electricity business model that connects extra electricity to electric power system and sells it → supplying schedule is previously tuned with electric power company.
Time Shifting: The model that stores daytime extra electricity and then transfers it to the evening time when the demand is high.

Ancillary Service is a typical example of Storage for Electric Power Stabilization: The real-time gap between demand and supply occurs in electric power systems and due to this frequency , system change is noticed. This change directly causes a decrease in the quality of electric power. Now power plants prevent this decrease by partially changing the thermal power plant outputs in order to deal with such a electric power demand change. This is referred to as frequency regulation, which is a business sector using storage.
UPS (Uninterruptible Power System) that is being widely supplied is also Energy Storage.: UPS systems are systems that supply AC or DC power sources when power sources are abnormal due to voltage and frequency changes or power blackouts and transient voltage. Further, UPS systems are widely applied not only to consumers who use personal computers but also to higher value-added manufacturing factories.