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Energy storage frequency modulation system and method

A technology of energy storage and intermediate frequency, which is applied in the direction of single AC network with different frequencies, load balancing of AC network, electric vehicles, etc. Unfavorable power grid scheduling and adjustment issues, to achieve the effect of improving operating characteristics and dynamic response, improving system reliability, and good versatility

Active Publication Date: 2018-03-06
华泰慧能(北京)能源技术有限公司
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Problems solved by technology

[0002] Due to the sudden change and uncertainty of natural conditions and weather conditions, the power of wind power generation and photovoltaic power generation fluctuates greatly, which is not conducive to the dispatching and adjustment of the power grid. The capacity and the utilization rate of the unit are not conducive to the economical operation of the system

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  • Energy storage frequency modulation system and method

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Embodiment

[0047] Combine Figure 1-19 , Describe the technical scheme of the present invention.

[0048] An energy storage frequency modulation system, including: battery 1, super capacitor 3, first DC / AC circuit 2, second DC / AC circuit 4, intermediate frequency transformer 5, third DC / AC circuit 6, DC capacitor 7, PCS circuit The direct current of the battery 1 is converted into intermediate frequency alternating current through the first DC / AC circuit 2; the direct current of the super capacitor 3 is transformed into intermediate frequency alternating current through the second DC / AC circuit 4; the first DC / AC circuit 2 and the second The alternating current generated after the output of the DC / DC circuit 4 is connected in series is connected to the input side of the intermediate frequency transformer 5. The output side of the intermediate frequency transformer is connected to the third DC / AC circuit 6; the third DC / AC circuit 6 is connected in parallel to the DC capacitor 7 and PCS Cir...

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Abstract

The invention relates to scheduling and operation of power systems, in particular to an energy storage frequency modulation system and method. The energy storage frequency modulation system comprisesa storage battery 1, a super-capacitor 3, a first DC / AC circuit 2, a second DC / AC circuit 4, a medium-frequency transformer 5, a third DC / AC circuit 6, a DC capacitor 7 and a PCS circuit. Compared with the prior art, the energy storage frequency modulation system has the beneficial effects that the storage battery and the super-capacitor are adopted as energy storage mediums, so that the characteristics that the storage battery is high in energy density, low in cost and diverse can be developed, and the advantages that the super-capacitor is high in charge and discharge power and good in dynamic response can also be developed, thereby achieving mixed utilization of two energy storage mediums and improving the characteristics of the energy storage system.

Description

Technical field: [0001] The invention relates to the dispatching and operation of a power system, in particular to an energy storage frequency modulation system and method. Background technique: [0002] Due to the sudden change and uncertainty of natural conditions and weather conditions, the power of wind power and photovoltaic power generation fluctuates greatly, which is not conducive to the dispatch and adjustment of the power grid. The phenomenon of "abandonment of light" and "abandonment of wind" occur from time to time, which reduces power generation. Capacity and unit utilization rate are not conducive to the economic operation of the system. In addition, the peak and valley load changes in the power system are huge, and corresponding energy storage equipment needs to be installed to achieve peak shaving and valley filling. According to the power level and dischargeable time of different types of energy storage media, combined with the cost factors of various energy sto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/02H02J3/32H02J7/34
CPCH02J3/02H02J3/32H02J7/345
Inventor 李海峰王光灏邓焱宋晨雷
Owner 华泰慧能(北京)能源技术有限公司
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