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Islanding detection circuit and detection control method for microgrid power generation system

A power generation system and island detection technology, which is applied in the direction of AC network circuit, circuit device, emergency treatment AC circuit layout, etc., can solve the problems of affecting system operation and conflicting interference signals, so as to ensure system redundancy and weaken stray waves , the effect of removing uncertain noise

Active Publication Date: 2016-03-16
JIANGSU FANGCHENG ELECTRIC SCI & TECHCO +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the system has multiple power generation systems, the injected interference signals may conflict with each other, affecting the normal operation of the system

Method used

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  • Islanding detection circuit and detection control method for microgrid power generation system
  • Islanding detection circuit and detection control method for microgrid power generation system
  • Islanding detection circuit and detection control method for microgrid power generation system

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Embodiment Construction

[0060] see Figure 1~7 , the invention relates to an island detection circuit and a detection control method for a micro-grid power generation system, the detection circuit includes a sampling circuit for sampling from the main power grid, and the sampling circuit passes the sampling signal through an isolation circuit and a filter circuit , waveform conversion circuit and optocoupler isolation circuit are input to the DSP processor, and after being processed by the DSP processor, the SVPWM signal sent by the PWM driver drives the IGBT inverter in the power unit, and the microgrid power generation access equipment passes through the DC chopper unit, The energy storage unit, power unit, EMI filter circuit, and circuit breaker are connected to the main grid.

[0061] Specifically, the sampling circuit is a voltage adopting circuit, one end of the voltage resistance is connected to the live wire (A phase, B phase or C phase), and the other end is connected to the neutral wire (N ...

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Abstract

The invention relates to an islanding detection circuit and detection control method for a microgrid power generation system. The detection circuit comprises a sampling circuit for sampling from a main power grid; the sampling circuit enables the sampling signal to pass through an isolating circuit, a filter circuit, a waveform conversion circuit and a photocoupling isolating circuit and then inputs the sampling signal to a DSP processor; after the sampling signal is processed by the DSP processor, a PWM signal is sent out from a PWM driver to drive an IGBT inverter; and the microgrid power generation equipment passes through the IGBT inverter, the filter circuit and a circuit breaker and then is connected to the main power grid. The invention relates to the islanding detection circuit and detection control method for the microgrid power generation system, and the islanding state can be detected in time and can be controlled.

Description

technical field [0001] The invention relates to an island detection circuit and a detection control method, in particular to a circuit and a detection control method for detecting and disconnecting a micro-grid in an island state when the main power grid is powered off, and belongs to the electric power grid. Electronic and automation control technology field. Background technique [0002] The island phenomenon refers to the fact that when the microgrid and the main grid are running in parallel, when the main grid unexpectedly interrupts the power supply, the power generation system of the microgrid fails to detect the power outage in time and cannot quickly cut itself off from the main grid network, thus forming a microgrid. A self-sufficient power supply phenomenon (state) in which the grid power generation system supplies power to surrounding loads and cannot be controlled by the power company. [0003] When the system is in an island state, since the main grid cannot co...

Claims

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Application Information

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IPC IPC(8): H02J3/38G01R31/00
CPCG01R31/00H02J3/001H02J3/38H02J3/388
Inventor 张建兴
Owner JIANGSU FANGCHENG ELECTRIC SCI & TECHCO
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