Micro power grid hybrid energy storage coordinative frequency modulation method

A hybrid energy storage and micro-grid technology, applied in the direction of AC network load balancing, etc., can solve problems such as inapplicability, and achieve the effect of improving frequency modulation performance, power quality and stability

Active Publication Date: 2015-11-04
TSINGHUA UNIV +2
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Problems solved by technology

However, there are often various energy storage methods in microgrids, including pumped hydro storage, batteries, flywheel energy storage, supercapacitors, compressed air energy storage, etc., and batteries can include lead-acid batteries, all-vanadium flow batteries, Sodium-sulfur batteries, etc., are not applicable to more complex hybrid energy storage devices

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  • Micro power grid hybrid energy storage coordinative frequency modulation method
  • Micro power grid hybrid energy storage coordinative frequency modulation method
  • Micro power grid hybrid energy storage coordinative frequency modulation method

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0030] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or e...

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Abstract

The invention provides a micro power grid hybrid energy storage coordinative frequency modulation method. A micro power grid comprises hybrid energy storage equipment. The hybrid energy storage equipment at least comprises energy storage devices from a first type to a third type. The method comprises the steps of: obtaining total power, which needs to be emitted or absorbed by the hybrid energy storage equipment, according to a current voltage frequency of an alternating current bus in the micro power grid and a frequency reference value; and utilizing a preset low-pass filter and high-pass filter to carrying out distribution on the total power which needs to be emitted or absorbed by the hybrid energy storage equipment, wherein first power distributed by the low-pass filter is emitted or absorbed by the first type of energy storage device, residual second power after the distribution of the low-pass filter and the high-pass filter is emitted or absorbed by the second type of energy storage device, and third power distributed by the high-pass filter is emitted or absorbed by the third type of energy storage device. By adopting the method, the energy storage devices of different types are uniformly managed and are applied to a micro power grid system for carrying out micro power grid frequency modulation, so that the stability of the frequency of the micro power grid system is realized.

Description

technical field [0001] The invention relates to the technical field of frequency modulation of a micro-grid system, in particular to a hybrid energy storage coordinated frequency modulation method of a micro-grid. Background technique [0002] In today's world, the economy is developing at a high speed, and science and technology are making great strides. However, the extensive economic growth model has caused environmental pollution and energy crisis. Therefore, the adjustment of energy structure is necessary. Environmentally friendly and renewable new energy sources such as solar energy and wind energy are gradually replacing traditional fossil energy and becoming the main energy source. New energy has the characteristics of scattered distribution, strong intermittent, and large volatility. Direct integration into the large power grid will inevitably affect the power quality and power supply stability of the large power grid. The emerging micro-grid technology is considere...

Claims

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Application Information

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IPC IPC(8): H02J3/28H02J3/32H02J3/30
CPCY02E60/16
Inventor 姜新建张祥成许德操袁华蔚张博李俊贤温生毅成静侯胜林张晓波苗淼
Owner TSINGHUA UNIV
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