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Energy storage converter with automatically adjustable switching frequency

An energy storage converter and switching frequency technology, applied in the field of energy storage converters, can solve the problems of power conversion device self-loss increase, lower power conversion efficiency, lower service life, etc., to reduce device loss and power consumption, The effect of prolonging the service life of equipment and reducing impact

Pending Publication Date: 2019-11-12
BEIJING JINMAO GREEN BUILDING TECH CO LTD
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Problems solved by technology

[0004] With the rapid development of power electronics technology, the execution speed of components used in energy storage converters is continuously increasing. A large number of energy storage converter R & D manufacturers continue to improve their power conversion in order to improve the technical parameters of energy storage converters. The switching frequency of the device. Although the increase of the switching frequency has improved the technical performance of the energy storage converter in some application scenarios, it has also brought about an increase in the loss of the power conversion device itself, reducing its service life and bringing More power loss, resulting in a waste of power, to a certain extent reduces the conversion efficiency of power

Method used

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  • Energy storage converter with automatically adjustable switching frequency

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Embodiment 1

[0017] Such as figure 1 As stated above, the present invention discloses an energy storage converter whose switching frequency can be automatically adjusted, which includes grid side current sampling Hall sensors H1_A, H1_B, H1_C; main circuit breaker BK; main fuse FU; main contactor KM; AC filter EMI; reactors L_A, L_B, L_C; device output current sampling Hall sensors H2_A, H2_B, H2_C; power conversion unit IGBT; DC side capacitor C; DC buffer circuit B; DC side contactor KN; control system, the control system may specifically be a master controller.

[0018] The energy storage converter control system controls the hardware device to realize the charge and discharge operation management of the lithium battery pack according to the instructions issued by the EMS or the human-machine interface, and can automatically realize grid-connected charging, grid-connected discharge, and dynamic reactive power through the application control software. Support, power factor adjustment, v...

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Abstract

The invention discloses an energy storage converter with an automatically adjustable switching frequency. A DC buffer circuit is arranged at a DC side, thereby guaranteeing the use stability of a battery; an EMI filter is arranged at an AC side, so the electric energy quality of alternating-current output is improved; the switching frequency of an IGBT in the converter is adjusted by monitoring the electric energy quality of a power grid side in real time, thereby reducing the working loss of equipment, and achieving the purposes of reducing the electric energy consumption of the equipment andprolonging the service life of the equipment.

Description

technical field [0001] The invention relates to an energy storage converter, in particular to an energy storage converter whose switching frequency can be automatically adjusted. Background technique [0002] With the opening of the first year of energy storage in 2018, my country's energy storage market has entered the GW era on the grid side and user side. Up to now in 2019, the installed capacity of energy storage is still growing steadily. The State Grid Corporation and China Southern Power Grid Corporation have successively released The guiding opinions on promoting the development of energy storage have sent a positive signal to the development of the energy storage industry. The forecast from RCESIP (Research Center for Energy Storage Industry Policy) of the Energy Storage Application Branch of the China Chemical and Physical Power Industry Association shows that the cumulative installed capacity of electrochemical energy storage in China is expected to reach 24GW in 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32
CPCH02J3/32
Inventor 袁志刚
Owner BEIJING JINMAO GREEN BUILDING TECH CO LTD
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