Comprehensive performance testing method and apparatus of energy storage system
A comprehensive performance test and energy storage system technology, applied in the field of electric energy storage evaluation, can solve the problems that the performance evaluation of energy storage power stations in operation cannot be referenced, and there is no good evaluation test method for the comprehensive performance of lithium batteries and lithium battery packs. To achieve the effect of ensuring safe operation and reducing maintenance workload
Inactive Publication Date: 2016-06-08
STATE GRID CORP OF CHINA +2
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Problems solved by technology
In the "Technical Specifications for Large-capacity Battery Energy Storage Station Batteries" that is being compiled, only the factory and type test methods and index requirements for battery cells and battery modules are stipulated, and the performance evaluation of energy storage stations in operation cannot be referred to for implementation.
There are few studies on the performance indicators and evaluation of large-scale energy storage systems or units themselves, such as capacity, charge and discharge efficiency, and monomer consistency. Therefore, there is no good evaluation test method for the comprehensive performance of lithium batteries and lithium battery packs.
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[0016] The technical means adopted by the present invention to achieve the intended invention purpose are further described below in conjunction with the drawings and preferred embodiments of the present invention.
[0017] In the embodiment of the present invention, some terms involved are described here first:
[0018] The energy storage unit refers to a unit composed of an energy storage converter and its battery stack, which can be directly dispatched by the energy storage subsystem monitoring system as an independent load or power supply.
[0019] A battery string is composed of multiple battery cells connected in series and in parallel.
[0020] figure 1 It is a flowchart of an energy storage system comprehensive performance testing method according to an embodiment of the present invention. like figure 1 As shown, the method includes:
[0021] Step 1, charge and discharge the energy storage unit in the energy storage system;
[0022] Step 2, collecting and obtainin...
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The invention discloses a comprehensive performance testing method and apparatus of an energy storage system. The method comprises: step one, charging and discharging are carried out on an energy storage unit in an energy storage system; step two, a working state parameter of the energy storage unit is collected and obtained; and step three, according to the working state parameter of the energy storage unit, a comprehensive performance testing result is generated by calculation. According to the method and apparatus, the energy storage system is divided into two levels: an energy storage unit and a battery group string. Battery group string state evaluation is carried out on a unit with an abnormal overall capacity index of the energy storage unit, so that the safe operation of the system can be guaranteed and the maintenance workload can be effectively reduced. The energy storage unit overall capacity index based on calibrated working condition data can reflect the healthy state of the energy storage unit. And various methods for evaluating a healthy state of a battery group string are provided from the perspectives of the battery service life, aging, and consistency.
Description
technical field [0001] The invention relates to a power storage evaluation method, in particular to a comprehensive performance testing method and device for an energy storage system. Background technique [0002] Due to the rapid development of wind power and photovoltaic power generation installed capacity, large-capacity energy storage systems have attracted attention and development due to their advantages of smoothing wind and wind fluctuations and adjusting wind and wind output power curves. As of 2013, the cumulative installed capacity of energy storage projects in China reached 53.7MW (excluding pumped storage). However, the running time of the energy storage power stations currently in operation is relatively short, the accumulation of operating data is small, and the operating personnel have insufficient knowledge of the performance of the equipment, which is not conducive to ensuring the safe and economical operation of new energy power stations. In view of the a...
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IPC IPC(8): G01R31/00G01R31/36
Inventor 李娜白恺李智宋鹏王若阳宗瑾柳玉刘汉民董文琦
Owner STATE GRID CORP OF CHINA