System for thermal power frequency modulation by combining super capacitor energy storage with lithium battery energy storage
A technology of supercapacitor and energy storage system, which is applied in the direction of flexible AC power transmission system, AC network load balancing, etc. It can solve the problems such as difficulty in realizing high-current rapid discharge, inability to meet command requirements, and low energy storage density, so as to prolong the service life , prolong working life and reasonable system design
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0024] see Figure 1~4 , a system of supercapacitor combined with lithium battery energy storage for thermal power frequency regulation, including an energy storage system; the energy storage system consists of a 9MW / 4.5MWh lithium iron phosphate battery, a 4MW / 120MWs supercapacitor, a first PCS circuit, and a second PCS circuit , DC / DC converter and medium voltage transformer; the 4MW / 120MWs supercapacitor, the second PCS circuit and the DC / DC converter const...
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