MAIN ISSUES WITH MICRO INVERTERS

Grid adaptability of solar inverters

This research focuses on the discussion of PV grid-connected inverters under the complex distribution network environment, introduces in detail the domestic and international standards and requirements on grid-connected inverter grid adaptability, and then analyzes in depth the impacts of the access point voltage changes, access point frequency changes, and access point harmonic changes on the inverters. [pdf]

New energy storage is listed as the main body of the field

Pumped storage is still the main body of energy storage, but the proportion of about 90% from 2020 to 59.4% by the end of 2023; the cumulative installed capacity of new type of energy storage, which refers to other types of energy storage in addition to pumped storage, is 34.5 GW/74.5 GWh (lithium‐ion batteries accounted for more than 94%), and the new incremental growth in 2023 is 260% year‐on‐year; the price of lithium‐ion batteries has dropped significantly.10–12 However, according to the data from China Electricity Council (CEC),the average annual utilisation hours of new energy storage in 2023 is 615 h, and the utilisation level is generally not high.10 Therefore, it is necessary to sort out the demands and challenges of energy storage technology to provide reference for the development of the energy storage industry. [pdf]

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