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Wind-solar-stored-energy direct-current microgrid control method and matched control system thereof

A DC micro-grid and control system technology, applied in the direction of parallel operation of DC power supplies, can solve the problems of lack of control methods and control systems for DC micro-grids, and achieve good installation effects, less manual participation, and high automation

Pending Publication Date: 2020-08-18
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem in the prior art that the DC microgrid lacks a control method and a control system in a complex situation

Method used

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  • Wind-solar-stored-energy direct-current microgrid control method and matched control system thereof
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  • Wind-solar-stored-energy direct-current microgrid control method and matched control system thereof

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Experimental program
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Embodiment 1

[0047] A method for controlling a wind-solar-storage DC microgrid includes, see Figure 1 to Figure 7 , including the following steps:

[0048] (1) Data collection: Wind-solar-storage DC micro-grid includes photovoltaic power generation devices, wind power generation devices, batteries, loads and controllers. Sensors installed on photovoltaic power generation devices, wind power generation devices, and batteries collect changes in the external environment, that is, volt power generation The unit collects light and temperature, wind power collects wind speed data, and uses these data as the input of fuzzy control, and obtains the desired output voltage through fuzzy rules

[0049] (2) Multi-level data analysis: define the voltage error variable and input voltage, and obtain the reference voltage of the maximum power point through fuzzy control;

[0050] (3) Energy management strategy: the control unit collects data such as voltage, current and energy storage SOC value of each ...

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Abstract

The invention relates to the field of wind-solar-stored-energy direct-current microgrid control devices, in particular to a wind-solar-stored-energy direct-current microgrid control method and a matched control system thereof. In order to solve the problem that a DC microgrid lacks a control method and a control system under a complex situation in the prior art, the invention provides a fuzzy control-based method for performing energy management on the system and optimizing MPPT control in photovoltaic power generation. The input end of a controller is connected with temperature sensors, illumination sensors, wind speed sensors and capacity value monitoring elements in other units, and data acquisition modules of all units; and the output end of the controller is connected with voltage converter modules in other units. The system has the advantages that various complex conditions are taken into consideration, energy management is carried out in a self-adaptive mode through fuzzy control, centralized control management is carried out on each unit, and the control mode facilitates later maintenance and repair.

Description

technical field [0001] The invention relates to the field of wind-solar DC micro-grid control devices, in particular to a wind-solar-storage DC micro-grid control method and a matching control system. Background technique [0002] With the aggravation of energy crisis and environmental problems, the world has turned its attention to the development of renewable energy, and distributed power represented by wind energy and solar energy is the main research hotspot. For some areas where large power grids reach. The use of wind power generation has unparalleled advantages. Due to the relatively large fluctuation of wind power generation, how to make the use of wind power generation and photovoltaic power generation more stable is a big problem. DC micro-grid has no problems such as reactive power compensation and harmonics, and is convenient for the access of distributed power sources. It has attracted people's attention in recent years. [0003] In response to the uncertaint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/12
CPCH02J1/12
Inventor 王君瑞王闯周静超向上郭腾
Owner BEIFANG UNIV OF NATITIES