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A method of energy storage frequency modulation

An energy storage and intermediate frequency technology, which is applied to a single AC network with different frequencies, transportation and packaging, and AC network load balancing, etc., can solve the problem of large fluctuations in wind power and photovoltaic power generation, reduced power generation and unit utilization , unfavorable economic operation and other issues

Active Publication Date: 2020-07-07
华泰慧能(北京)能源技术有限公司
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AI Technical Summary

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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Embodiment

[0047] combine Figure 1-19 , to illustrate the technical solution of the present invention.

[0048] An energy storage frequency modulation system, comprising: a storage battery 1, a supercapacitor 3, a first DC / AC circuit 2, a second DC / AC circuit 4, an intermediate frequency transformer 5, a third DC / AC circuit 6, a DC capacitor 7, and a PCS circuit The direct current of the storage battery 1 is converted into intermediate frequency alternating current by the first DC / AC circuit 2; the direct current of the supercapacitor 3 is converted into intermediate frequency alternating current by 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 / AC circuit 4 is connected in series is connected to the input side of the intermediate frequency transformer 5, and 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 paral...

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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 scheduling and operation of a power system, in particular to an energy storage frequency regulation method. Background technique: [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. In addition, the peak and valley loads in the power system vary greatly, and it is also necessary to install corresponding energy storage equipment to realize peak shaving and valley filling. According to the power level and discharge time of different types of energy storage media, combined with the cost factors of various energy storage media, it can be seen that battery energy storage has advantages in terms of energy density;...

Claims

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Application Information

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Patent Type & Authority Patents(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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