SPRIXIN's 100+ MW Large-capacity Battery Energy Storage Solution

Time：2023-02-23 Source：SPRIXIN

As renewable energy is becoming one of the mainstays of electricity supply in more and more countries, energy storage has gotten increasingly important. China, too, is seeing a drastic increase in battery energy storage installation. At present, there are two major trends regarding the development of battery energy storage in China:

Trend 1: 100MW-class large-capacity battery energy storage stations have become the new norm
According to CNESA statistics, in 2022, the installed capacity of battery energy storage projects newly put into operation in China has reached 6.9GW/15.3GWh, a growth rate of more than 180% compared with the same period in 2021. In the same year, the scale of individual battery energy storage projects also increased significantly. More than 20 100-megawatt projects have achieved grid-connected operation, and the number of 100-megawatt projects under construction has excessed 400, including 7 projects reaching the GW-class, the largest is Qinghai Golmud East Export Shared Energy Storage Project, with a capacity of 2.7GW/5.4GWh.

Trend 2: Stored energy is entering the power spot market to increase revenue
In China’s pilot provinces of power trading, Shandong, Shanxi, and Gansu have already formulated rules and regulations for battery energy storage to participate in the spot market. In these provinces, battery energy storage plants can profit from, ’ respectively, ‘spot spread arbitrage+capacity leasing+capacity price compensation’, ‘spot spread arbitrage+PFR’, or ‘spot spread arbitrage + peak shaving capacity market’. Shandong is the first province to allow independent battery energy storage projects in the spot market, and the number of provinces doing so is increasing.

SPRIXIN Large-capacity Battery Energy Storage Solution
Large-capacity energy storage requires massive data processing. The SCADA platform of SPRIXIN’s iEMS+ adopts high-performance distributed real-time data storage that supports scalable and large-capacity real-time data access of a million-point mass, and can continuously improve the magnitude of data access through elastic expansion of the system architecture. Additionally, based on its characteristic of more writes less reads, and stable structure, the time series library is used to store historical data, providing our customers with intelligent battery management at higher data access and process rate and lower cost.

Case 1: independent battery energy storage project of 100MW/200MWh on the power grid in Shandong
Application Scenario: SPRIXIN iEMS collects data from the battery packs and PCS for real-time monitoring and control of the BESS to execute the grid’s instructions of peak and valley regulation to smooth the intermittent and fluctuating output of photovoltaic and wind power. Energy storage on the power grid side can enhance the safe and stable operation of the grid and promote renewable energy consumption.

For large-capacity battery energy storage to participate in the electricity spot market, SPRIXIN provides guidance for pre-trade declaration strategy based on forecasts on the next day's power limit status, electricity supply and demand, and provincial node electricity price. Such forecasts are calculated by the SPRIXIN power trading algorithm model that is decoupled from the private data of the station, and completes comprehensive analysis taking into consideration various factors influential to the electricity price, such as the provincial wind and solar resources and seasonal climate and weather affecting renewable energy power generation, local power consumption characteristics, coal price fluctuations, etc.

Case 2: PV+battery project of 30MW/60MWh in Shandong
Application Scenario: The BESS in the project is dispatched by the grid for 1/3 of the day. With the opening of the Shandong spot market to energy storage, the SPRIXIN iEMS+ system can help complete the daily and real-time charge and discharge strategy declaration by estimating current and real-time electricity prices and analyzing the BESS status and the peak-valley price difference. The iEMS can effectively improve the utilization, profitability, and automation of energy storage.

Technical Difficulties in the Development of Energy Storage
It is rather evident that energy storage is steadily advancing towards scale and marketization, followed by higher data access and processing requirements, as well as more complex application scenarios and profitability rules. Large-capacity battery energy storage projects are mainly installed on the grid side and power plant side. The technical difficulty of such projects lies in the large installed capacity of energy storage and high requirements for SCADA acquisition and data processing capabilities. Further, for energy storage to profit from the market via spot price difference arbitrage, it is significant to obtain accurate estimations of the next day's power generation, electricity price, and the BESS’s status and power retention.

SPRIXIN's large-capacity battery energy storage solution is specially designed and developed for the demands of scale and marketization of energy storage. The system supports data access and storage of millions of points with strong data processing capabilities, and combines multiple factors to comprehensively calculate charge and discharge strategy that guarantees the benefits of power spot trading. The SPRIXIN large-capacity battery energy storage solution is the guard of the safe, precise, and intelligent control of 100-megawatt-level energy storage.