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Control method for regulating island light diesel micro-network frequency on basis of robust control and super-capacitor

A supercapacitor, robust control technology, applied in a single AC network with different frequencies and other directions, can solve problems such as the inability to effectively suppress power fluctuations

Inactive Publication Date: 2013-03-27
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
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Problems solved by technology

In addition, some scholars specially design load resistors to consume fluctuating power, but this cannot effectively suppress power fluctuations.

Method used

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  • Control method for regulating island light diesel micro-network frequency on basis of robust control and super-capacitor
  • Control method for regulating island light diesel micro-network frequency on basis of robust control and super-capacitor
  • Control method for regulating island light diesel micro-network frequency on basis of robust control and super-capacitor

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Experimental program
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Embodiment Construction

[0044] 1. Mathematical model of independent microgrid considering hybrid energy access:

[0045] The independent microgrid mainly includes photovoltaic power generation system, diesel engine system and supercapacitor hybrid power supply system, such as figure 1 The structural model diagram of the hybrid independent micro-grid is shown. The photovoltaic power generation system and the super capacitor are connected in parallel and then added to the diesel generator system to supply power to the load.

[0046] Solar cell modules are of great significance to the design of inverters and control systems, the traditional I-V characteristics of solar cell modules, the saturation current of solar cell modules With the change of temperature, the internal resistance current of the photovoltaic cell can be expressed by the following formula:

[0047]

[0048]

[0049]

[0050]

[0051] in and are the output current and output voltage of the solar cell module, is the ph...

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Abstract

The invention relates to a control method for regulating island light diesel micro-network frequency on the basis of robust control and a super-capacitor. Mathematical models of a photovoltaic system, the super-capacitor and a diesel generator system are built respectively, a robust controller is added in the diesel generator system, load changing increment is respectively acted on the photovoltaic system and the super-capacitor, and the photovoltaic system and the super-capacitor are connected in parallel to be added in the diesel generator system to supply electricity to a power system. Aiming at the light diesel hybrid power generation independent micro-network, frequency deviation is reduced through the frequency optimization control strategy of energy storage matching of the robust load frequency controller and the super-capacitor. The control method achieves output power control and maximum power tracking of the photovoltaic system, and simultaneously reduces storage capacity of an energy storage device. A simulation result shows that compared with the traditional diesel speed control strategy, the control method effectively reduces frequency deviation of an island power system.

Description

technical field [0001] The invention relates to a micro-grid frequency optimization control, in particular to a frequency control method based on robust control and supercapacitor adjustment for an isolated island optical diesel micro-grid. Background technique [0002] With the accelerated pace of national industrialization and increasing emphasis on environmental issues, the exploration and research on renewable energy has been accelerated. Photovoltaic (PV) power generation is becoming increasingly important as a renewable energy source that requires no fuel, is inexpensive to maintain, and has no noise and wear from moving parts. However, the output of photovoltaic power generation system will be affected by inconstant sunlight, temperature and weather conditions. When a large number of photovoltaic systems are connected to the grid, the fluctuation of output power will cause problems such as voltage fluctuation and excessive frequency deviation of the power system. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/02
Inventor 米阳赵晋斌符杨张寒
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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