Energetica India Magazine: september 2020

41 energetica INDIA- September_2020 ENERGY STORAGE The challenges are also related to battery life, in that the temperature control system for energy storage is paramount. Particularly, the thermal simulation and experimental verifica - tion, air duct design of storage contain- er, air conditioning power configuration should strictly be controlled, or it may lead to the uneven temperature of lith- ium-ion batteries and hence aggravate battery instability. The efficient integration: 1+1>2 The solar-plus-storage solution relies on deep analysis and technology inte- gration of the whole system instead of a mechanical combination of two sys- tems, so as to achieve a leap forward of “1+1 > 2” in terms of efficiency and performance. Technically, the hybrid system needs to ensure the stable operation of PV, energy storage and the grid, creating smooth communication among hard- ware, software and systems. There exist a variety of devices from different man- ufactures, so the compatibility becomes a major challenge for the integrator who needs to be adept at all the protocols. Particularly, the solar-plus-storage sys- tem needs to fully consider the man- agement of batteries and PCS when dispatching the output, to improve the safety and ROI of the whole hybrid plant. So only an experienced compa- ny which excels at both energy storage and PV industry can integrate an effi - cient system. In addition, efficient energy manage - ment is also crucial to safe operation and maximum yields of the whole sys- tem. As the brain of the solar-plus-stor- age plant, EMS can control the charge and discharge of the batteries, and in- struct how the energy storage system cooperates with the PV system and the grid. The intelligent EMS can manage differ- ent manufacturers’ equipment in a uni- fied interface through an intelligent con - trol unit; based on PV power prediction and millisecond response characteris- tics of energy storage, it can control the PV system smoothly and, improve the grid stability in return. Meanwhile, a mil- lisecond-level rapid linkage mechanism bridged among PCS,BMS and EMS can ensure the safety of the battery and the entire system. Sungrow is among a few of the suppli- ers having expertise on EMS. The EMS developed by the company can be ap- plied in a multitude of scenarios cov- ering power generation, transmission, distribution and utilization, supporting multi-functional digital energy manage- ment. There’s no doubt that the advancement of technology allows more integration between renewable energy and stor- age, indicating a mature multiple-ener- gy era is imminent. The marketplace will see the integrated energy storage sys- tem which is more cost-optimized, saf- er and more efficient, getting rid of the instability and intermittent constraints of renewable energy.