With continuous improvement in energy costs, many enterprises have started taking the investment cost and benefit into more consideration when it concerns an energy storage system. Therefore, the following article is just about how much power enterprises can save with the energy storage power station capacity of 1MWh.
1MWh, that is 1000 KWH energy storage power stations are generally composed of many energy storage cabinets. Take the energy storage cabinet used by the energy storage system of Huijue Group for example, which is of 100kW/200kWh. In order to make a 1MWh energy storage power station, it normally needs to store 1000KWH electricity, which requires five storage cabinets.
The core role of energy storage power stations is to adjust the power load by charging and discharging, especially in the peak period of electricity prices by using stored electrical energy, so as to avoid the consumption of high prices. Taking Zhejiang Province as an example, it is assumed that the electricity price difference used by the enterprise is 0.9 yuan/degree, and the energy storage system carries out the operation of "2 charge and 2 discharge" every day (that is, two charges and two discharges).
Based on the above data, the calculation formula of electricity savings is as follows:
1000 KWH electricity ×2×87%×0.9 yuan ×330 days =516,780 yuan
Thus, 1MWh energy storage power station can save about 517,000 yuan of electricity costs for enterprises every year.
The price of electricity is so different in different regions that the benefit of saving from energy storage systems will also be very different. A key point in calculating the saving benefit of electricity cost from energy storage power stations is to know the price difference between peak and valley electricity in the province.
The formula for calculating the price difference in electricity prices is:
Price difference = peak price peak price-flat price valley price
For energy storage systems, the "2 charge and 2 discharge" method is usually adopted: that is, charging at a time of low electricity price (valley and peaceful electricity price) and discharging at a high price (peak and peak electricity price).
Take Guangdong Province as an example: the peak price is higher than the peak price; thus, the price difference adopted in the first charge and discharge of the energy storage system is the difference value between the peak price and valley price, and the price difference of the second charge and discharge is the difference value between the peak price and the flat price.
The calculation of the average annual price difference has to consider the following three factors:
A weighted average of all the above gives the Average Annual Price Differential. The companies can estimate correctly about the saving potentiality regarding electricity through Energy Storage systems using this mechanism with a basis on the local Electricity Pricing Policy.
Conclusion:
It can be observed from the real data that 1MWh energy storage power station could save around 517,000 yuan of electricity cost for an enterprise every year, with very significant savings effects. Besides, with continuous change in the power market, the electricity-saving potential will be further improved for the energy storage system. As the price of electricity is in wide variation from place to place, the specific savings also need to be calculated with precision according to the local structure of electricity prices and grid policies. Either for saving on electricity bills or improving energy efficiency, energy storage systems have evinced huge market potential.
