Q: How to achieve “peak cutting and valley filling” through energy storage?
Achieve Peak and Valley Filling with Energy Time-Shift Technology
Energy time-shift involves using energy storage to balance power load fluctuations. It enables users to charge batteries during off-peak periods and discharge stored power during peak periods, ensuring efficient load management.
The energy storage system is like a “reservoir” that can realize the time shift of energy. When the photovoltaic power generation output is large, the energy that cannot be used temporarily is stored in the battery.
When the photovoltaic power generation output is insufficient, the energy in the battery is released to the power load, to achieve the “peak filling” of photovoltaic power supply, to maximize the proportion of photovoltaic power generation, to minimize the cost of electricity, and to help enterprises reduce carbon emissions.
Q: How can commercial energy storage reduce the capacity and demand of owners?
Reduce Transformer Capacity Demand and Electricity Costs with Energy Storage System
Capacity reduction utilizes energy storage systems to decrease transformer capacity demand, reducing costs for expansion and fixed/max demand electricity charges in the future. Lower construction expenses and optimize electricity usage with our efficient energy storage solutions.
In China, large industrial electricity with transformer capacity of 315 kVA and above uses a two-part tariff.
Electricity pricing comprises two components: the energy price and capacity price. The energy price is based on actual power consumption, while the capacity price is determined by either transformer’s fixed capacity or maximum demand. These charges are calculated independently and combined to determine the total electricity cost for customers.
After the installation of the energy storage system, the power of the energy storage machine can replace a part of the transformer capacity to supply power to the load, playing the role of leveling the load power peak and reducing the overall capacity demand, thus reducing the transformer construction cost and the later capacity electricity bill.
Consider a 300kW energy storage system configuration. When used for on-demand charging, the system can supply 300kW of power, mitigating peak load impacts (equivalent to adding a 300kW transformer). With an expected demand cost of 40 yuan/KW/month, the owner saves 12,000 yuan per month thanks to the 300kW energy storage system.
Q: How can industrial and commercial energy storage achieve dynamic capacity?
Cost-Effective Capacity Expansion with Energy Storage Systems
A: The transformer capacity of the user is fixed. Generally, when the user needs the transformer to be overloaded at a certain time, the transformer needs to be expanded. Generally speaking, there are two ways to increase capacity: one is static capacity and the other is dynamic capacity.
Static capacity is directed to the power board to apply for a larger transformer, but this way is very expensive.
Dynamic capacity is increased by installing energy storage systems. Through the energy storage system in the overload operation period of the transformer energy storage and discharge, the transformer load is reduced, thereby reducing the cost of transformer capacity improvement. Through the energy storage system can not only greatly reduce costs, but also increase returns through peak and valley arbitrage.
