Method for designing frequency controller of independent micro-grid

A frequency controller and design method technology, applied in AC network circuits, sustainable manufacturing/processing, photovoltaic modules, etc., can solve the problems of large fluctuations in photovoltaic output power and difficult control.

Inactive Publication Date: 2012-07-18
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0004] The invention aims at the problem that the independent micro-grid system with photovoltaic power generation system and diesel generator as the power supply is greatly affected by the fluctuation of photovoltaic output power and difficult to control, and proposes a design method for the frequency controller of the independent micro-grid, and designs an interference observer And sliding mode controller, by adjusting the output power of the diesel generator, reduce the microgrid frequency deviation caused by load changes and photovoltaic system power fluctuations

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  • Method for designing frequency controller of independent micro-grid
  • Method for designing frequency controller of independent micro-grid
  • Method for designing frequency controller of independent micro-grid

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Embodiment Construction

[0032] (1) The mathematical model of independent microgrid considering hybrid energy access: the dynamic model of microgrid is as figure 1 As shown, figure 1 It is the dynamic structure model of the complementary independent microgrid of Guangchai. These include diesel power generation systems, photovoltaic power generation systems, interference observers and sliding mode frequency compensation controllers. Mainly use the load value estimated by the interference observer to design the sliding mode frequency compensation controller, and use the controller to adjust the output power of the diesel generator, thereby suppressing the frequency deviation of the microgrid caused by the fluctuation of the photovoltaic output power and the continuous load change in the independent microgrid . The following are figure 1 Detailed mathematical model of each module in the.

[0033] Solar cell modules are of great significance to the design of inverters and control systems. The traditional I-...

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Abstract

The invention relates to a method for designing a frequency controller of an independent micro-grid. The method comprises the following steps of: establishing a mathematical model of a power generation system of the independent micro-grid, wherein the independent micro-grid comprises a photovoltaic power generation system and a diesel engine system hybrid power supply system; establishing a photovoltaic system mathematical model; establishing a diesel engine mathematical model comprising load disturbance; and designing an interference observer and a sliding mode controller. The output power of a diesel engine generator is regulated to reduce micro-grid frequency deviation caused by a load change and the power fluctuation of a photovoltaic system. By a designed sliding mode load frequency compensation controller, the micro-grid frequency deviation can be reduced, the maximal power output of the photovoltaic system is ensured, and the utilization rates of renewable energy sources are increased.

Description

Technical field [0001] The invention relates to a power system frequency control technology, in particular to a design method of an independent microgrid frequency controller based on an interference observer and sliding mode control. Background technique [0002] Isolated island operation is an important operation mode of microgrid, and it is an important way to solve the problem of power consumption in remote areas of our country, local power consumption in the event of a large grid disaster, and army power consumption under war conditions. But in independent operation mode, the microgrid must be able to maintain its own voltage and frequency. When new energy sources such as photovoltaics are connected to the microgrid, the output power of the photovoltaic power generation system is volatile, random, and intermittent due to the influence of weather changes, so the volatility of power output and the continuous change of the load in the microgrid It may cause unbalanced active p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02N6/00H02S10/10
CPCY02E10/50Y02P80/14
Inventor 米阳韩云昊
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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