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Micro-grid multi-micro-source inverter loop current and voltage fluctuation master-slave control method

A control method and technology of voltage fluctuation, applied in the direction of single-grid parallel feeding arrangement, etc., can solve the problems of complex technology, and achieve the effect of quickly responding to voltage fluctuation and suppressing the generation of circulating current between micro-sources.

Inactive Publication Date: 2010-04-21
HUNAN UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology of this method is relatively complicated, and a series of technical problems such as the output voltage, frequency, phase, and power transmission of two or more power generation systems that are far apart need to be solved.

Method used

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  • Micro-grid multi-micro-source inverter loop current and voltage fluctuation master-slave control method
  • Micro-grid multi-micro-source inverter loop current and voltage fluctuation master-slave control method
  • Micro-grid multi-micro-source inverter loop current and voltage fluctuation master-slave control method

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Experimental program
Comparison scheme
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Embodiment Construction

[0018] Such as figure 1 As shown: the micro-grid multi-micro-source inverter system includes micro-sources, rectifiers, inverters, industrial computers and DSP control boards. The output terminals of different forms of micro-sources are connected to the input terminals of the inverter through the rectifier, and the inverter The output end of the device is connected to the micro-grid voltage busbar after being passed through the inductance-capacitor filter to form a micro-grid system, connected to the adjacent load, and connected to the distribution network through a static transfer switch; the industrial computer is directly connected to The microgrid and the distribution network, and the industrial computer is also connected to the DSP control board through the data transmission bus, and the DSP control board is also connected to the microgrid through voltage and current transformers.

[0019] When the static transfer switch STS is turned off, the micro-grid system is disconn...

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PUM

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Abstract

The invention discloses a micro-grid multi-micro-source inverter loop current and voltage fluctuation master-slave control method, which is implemented by a master controller and slave controllers. The master controller comprises a power ring, a voltage ring and a micro-grid current feedforward link. Each slave controller consists of a voltage outer ring and a current inner ring for double-ring control, and can quickly respond to voltage fluctuation caused by switching a distribution network and micro-sources near loads. When a micro-grid system is in a parallel operation mode, the master controller controls the energy output of the micro-sources of the micro-grid by setting rated active power and rated passive power of the micro-grid system, and simultaneously processes real-time voltage and real-time frequency of the distribution network to send control signals to each slave controller, so that inverters output active power and passive power required by the micro-grid system; and the inverters uniformly output voltage synchronous with the distribution network to meet the requirement of synchronization of the micro-grid and the distribution network so as to avoid generating loop current among the micro-sources.

Description

technical field [0001] The invention belongs to the field of power quality and control technology of a microgrid and a power distribution system including a microgrid, and in particular relates to a master-slave control method for circulating current and voltage fluctuation of a microgrid multi-microsource inverter. Background technique [0002] Accelerating energy construction and ensuring energy supply have always been one of the important goals of my country's economic construction and development. The requirements for sustainable development of energy and electricity and the environmental problems caused by the use of fossil energy require us to seriously consider the issue of vigorously developing clean and efficient distributed power generation and energy supply systems. However, the increasingly widespread application of distributed generation also brings new challenges to the existing power system, which limits the scale of distributed generation grid connection. Ca...

Claims

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Application Information

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IPC IPC(8): H02J3/38
Inventor 罗安于力彭双剑吕志鹏蔡平兰征吕文坤康珍郭镥
Owner HUNAN UNIV
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