Abstract: The circulating current in MMC-BESS can't be avoided although battery storage units are added to the MMC to solve the absorption problem in the process of new energy grid connection. The harmonic components of circulating current will introduce extra power loss, increase current stress of power devices, and even cause instability .
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Pumped storage hydropower (PSH) is a type of hydroelectric energy storage. It is a configuration of two water reservoirs at different elevations that can generate power as water moves down from one to the other (discharge), passing through a turbine. The system also requires power as it pumps water back into the upper reservoir (recharge).
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Direct liquid cooling technology is one of the most promising energy-saving cooling technologies due to its advantages of high cooling efficiency, low noise, and reduction of hot spots. Waste heat recovery is also one of the effective ways to improve energy efficiency and reduce carbon emissions due to higher coolant temperature.
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