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Micro grid power allocation method based on distributed finite-time controller

A technology with limited time and distribution method, applied in the direction of sustainable manufacturing/processing, single-network parallel feeding arrangement, climate sustainability, etc. The effect is not ideal enough to achieve the effect of improving the active power distribution ability, accelerating the convergence time and speed

Active Publication Date: 2016-04-06
ZHEJIANG UNIV
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Problems solved by technology

However, the geographically dispersed nature of the power supply makes it very complicated to build such a communication network for the microgrid control center to collect data, and the cost is high and the reliability is low
In addition, the fluctuation of the output power of these power sources also affects the reliability of power distribution in the microgrid
Therefore, the traditional centralized control method can no longer achieve reliable control of the power distribution of the actual microgrid, which is also the main reason why the control effect of the traditional control method is not ideal in actual projects and it is difficult to realize the power distribution of the microgrid.

Method used

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  • Micro grid power allocation method based on distributed finite-time controller
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Experimental program
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specific Embodiment

[0038] A simulation experiment is carried out on the microgrid power distribution method proposed by the present invention in the MATLAB software tool. The experimental parameters are shown in Table 1 below.

[0039] Table 1

[0040] parameters

value

The number of internal power sources in the microgrid n

10

Integral coefficient K 1

1.5

Convergence gain K

5

Adjustable integral coefficient λ

0.7

[0041] Detect experimental waveform by Scope module, calculate test time by Timer tool, adopt the control method that the present invention proposes, gained experimental data: P ref –P<0.5KW, the convergence time of the actual value of the active power utilization rate of all power output is <1s, the difference between the actual value of the active power utilization rate of each power output and the reference value of the active power utilization rate of all power output Error <1.5%.

[0042] The screenshot of the e...

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Abstract

The invention discloses a micro grid power allocation method based on a distributed finite-time controller, comprising the following steps: processing the reference value and actual value of the active power of a micro grid through a nonlinear integral controller to get reference values of active power utilization rate of all power supplies; establishing a communication network connecting all the power supplies inside the micro grid; and controlling all the power supplies through a distributed finite-time controller to make the actual values of active power utilization rate of the all power supplies approach the reference values. By using the method, the active power distribution capacity of the micro grid is improved, the interference of the malfunction of the communication network to the stable operation of the micro grid is eliminated, the influence of the traditional micro grid control center on the reliability of the micro grid is eliminated, the convergence of active power output by the distributed power supplies is speeded up, and the dynamic performance of the micro grid is improved.

Description

technical field [0001] The invention relates to a grid distribution method, in particular to a micro grid power distribution method based on a distributed finite time controller. Background technique [0002] The penetration rate of distributed power sources based on renewable energy (such as solar photovoltaic, wind power, etc.) with the characteristics of abundant reserves, clean and efficient, and geographical dispersion in microgrids is gradually increasing. However, the fluctuation of the output power of these power sources makes the power allocation problem of the microgrid very complicated, that is, how to effectively control the output power of each power supply so that the total output power of all power supplies meets the requirements of the microgrid. Microgrid power distribution is a basic and key issue in the field of microgrid research. Whether the power can be effectively allocated, that is, whether the total output power of all power sources in the microgrid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48
CPCY02P80/14
Inventor 李超勇张国月齐冬莲
Owner ZHEJIANG UNIV
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