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Microgrid with hybrid energy storage and its control method

A technology of hybrid energy storage and micro-grid, which is applied in wind power generation, photovoltaic power generation, electrical components, etc., can solve the problems of unreasonable power distribution of distributed power sources, complex control parameters of the system control loop, and high-power oscillation, etc. The effect of service life, investment cost reduction and dynamic stability improvement

Inactive Publication Date: 2017-03-08
SHENYANG POLYTECHNIC UNIV
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AI Technical Summary

Problems solved by technology

In recent years, some literatures at home and abroad have adopted the droop control method for the operation and control of the microgrid, but the power of each distributed power supply cannot be reasonably allocated during the island operation, and large power oscillations are likely to occur during the dynamic process, and the control parameters of the system control loop Complex, controllable power shortage in the process of micro-source switching, and system stability issues in the smooth transition of grid-connected and off-grid operating modes are all to be solved

Method used

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  • Microgrid with hybrid energy storage and its control method
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  • Microgrid with hybrid energy storage and its control method

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Embodiment Construction

[0043] Below in conjunction with accompanying drawing, the present invention will be further described:

[0044] The invention relates to a micro-grid with hybrid energy storage and a control method thereof. A hybrid energy storage system based on a supercapacitor and a storage battery is connected in parallel to the micro-grid, and a fuzzy sliding mode control method is used to control the hybrid energy storage device. In Matlab The / simulink platform builds a microgrid simulation model with hybrid energy storage and multiple micro-sources. Through specific examples, it is verified that the algorithm has better steady-state performance and dynamic performance, so that the microgrid can be controlled more precisely.

[0045] The present invention is a microgrid with hybrid energy storage, characterized in that: the photovoltaic cell PV is connected to the DC / AC converter in parallel with the load Load1, the fan wind is connected to the AC / DC rectifier and the DC / AC inverter and...

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Abstract

The present invention mainly relates to a micro-grid with hybrid energy storage and its control method. A hybrid energy storage system based on a supercapacitor and a storage battery is connected in parallel to the micro-grid, and a fuzzy sliding mode control method is used to control the hybrid energy storage device. . This control method can not only stabilize the fluctuating power of the microgrid grid connection and the fluctuating power when the microgrid is disconnected from the grid, but also realize the smooth switching of the system from grid connection / off grid, thereby improving the stability of the system and further improving the stability of the system. Verify the superiority of this control method.

Description

technical field [0001] The invention mainly relates to a micro-grid with hybrid energy storage and a control method thereof, and belongs to the technical field of micro-grid utilization. Background technique [0002] In order to meet the needs of the sustainable development strategy of energy utilization, renewable energy power generation technology has received great attention and made some progress in recent years. Applying renewable energy to the microgrid is a major initiative. However, the system inertia of the microgrid is small. Renewable energy is affected by natural conditions, and the power output is intermittent and random. Therefore, the access of this type of power supply will It will have a certain negative impact on the stability of the system operation and the reliability of the power supply. When the microgrid is running, diesel generators, micro gas turbines, fuel cells and other controllable micropower sources with stable output power and large capacity a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/24H02J3/32H02J3/383H02J3/386Y02E10/56Y02E10/76Y02E70/30
Inventor 卢芸赵永来
Owner SHENYANG POLYTECHNIC UNIV
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