Abstract
With the "dual carbon" goal proposed and the direction of building a new power system dominated by new energy sources clarified, the energy storage industry has entered the fast lane of accelerated development. However, due to the imperfect marketization mechanism and the lack of effective power market ancillary service policies, it is difficult to 00EFfectively recover the cost of energy storage construction, which restricts the development of the energy storage industry to a certain extent. Therefore, it is urgent to clarify the development trend and cost recovery mechanism of typical types of energy storage under the distributed energy system, and clarify the impact of the operating cost of the electrochemical energy storage system. This paper systematically analyses the domestic and foreign energy storage investment channelling mechanisms, clarifies the impact of energy storage cost system operation on costs, and helps the development of the energy storage industry.
Highlights
The influencing factors of the charge-discharge cycle cost of electrochemical energy storage equipment are mainly related to DOD and discharge efficiency
Means that the battery is fully discharged within 20 minutes, and so on.In order to accurately establish the relationship between the loss model of the electrochemical energy storage battery and the DOD and discharge efficiency, the following Figure 1 shows the relationship between the cycle period of the lithium ion battery and the DOD:
The photovoltaic system with energy storage battery must be installed after December 2012, and the peak power cannot exceed 30kWp; the power fed back by the photovoltaic system to the grid cannot exceed 50% of the peak power; the system service life must be at least 20 years; the battery system must Have a 10-year warranty; installers must have relevant qualifications
Summary
The influencing factors of the charge-discharge cycle cost of electrochemical energy storage equipment are mainly related to DOD and discharge efficiency. 1C means that the battery is fully discharged within 1 hour, 2C means that the battery is fully discharged within half an hour, 3C means that the battery is fully discharged within 20 minutes, and so on.In order to accurately establish the relationship between the loss model of the electrochemical energy storage battery and the DOD and discharge efficiency, the following Figure 1 shows the relationship between the cycle period of the lithium ion battery and the DOD (at a given temperature and discharge efficiency):. The mathematical expression of the relationship between the cycle period of the lithium battery and the DOD can be obtained: L(D) D (2). In the formula, a, b, c, d are the coefficients of the battery cycle cost model
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