Converter detection device and method applicable to distributed power island detection

A distributed power supply and island detection technology, applied in the field of power system control, can solve problems such as complex control and reduced power quality of converter output

Pending Publication Date: 2017-11-24
STATE GRID LIAONING ELECTRIC POWER RES INST +2
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control is more complicated; due to frequency or phase offset, harmonics are injected into the grid, which reduces the power quality output by the converter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Converter detection device and method applicable to distributed power island detection
  • Converter detection device and method applicable to distributed power island detection
  • Converter detection device and method applicable to distributed power island detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] A converter detection device suitable for distributed power island detection, such asfigure 1 shown, including a converter and a signal detection unit;

[0040] The signal detection unit includes: a frequency signal detection circuit, a voltage sensor, a current sensor, a synchronous signal sampling circuit, a signal conditioning circuit, an A / D conversion circuit, a DSP control chip and a display device.

[0041] The input end of the converter is connected to the distributed power supply, and the output end of the converter is connected to the input end of the signal detection circuit, the input end of the voltage sensor and the input end of the current transformer; the output end of the voltage sensor and the input end of the current transformer are connected. The output end of the current sensor is connected to the input end of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a converter detection device and method applicable to distributed power island detection. The device comprises a current device and a signal detection unit, wherein the signal detection unit comprises a frequency signal detection circuit, a voltage transducer, a current transducer, a synchronous signal sampling circuit, a signal conditioning circuit, an A / D converting circuit, a DSP control chip and a displaying device. The method comprises the steps of collecting voltage signals, current signals and sampling frequency signals output by a converter through the voltage transducer, the current transducer and the frequency signal detection circuit; conducting synchronous processing on the voltage signals and the current signals output by the converter through the synchronous signal sampling circuit; making the DSP control chip conduct calculation according to digital values of voltage values, current values and frequency values which are subjected to analog-digital conversion to detect whether a distributed power supply is in an island state or not. The converter detection device is simple in structure, convenient to use, and effective, and tests and operation are integrated; the converter detection device can effectively make the detection method diversified and accurate.

Description

technical field [0001] The invention belongs to the technical field of power system control, and in particular relates to a converter detection device and method suitable for island detection of distributed power sources. Background technique [0002] With the development of new energy. Distributed power generation systems such as photovoltaics and wind power have been widely used, and islanding effect detection is an important issue when distributed power generation is connected to the grid. For distributed grid-connected power generation systems based on photovoltaic power generation and wind power generation, when the grid is powered off or the distributed power supply is disconnected from the grid, if the grid-connected power generation system fails to detect the power outage state and is disconnected from the grid, the It will continue to work and form an islanded system with independent power supply with surrounding loads, which is the so-called islanding effect. [...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/40
CPCG01R31/40
Inventor 穆永强王春生蒋元宇王勇张树利佟永吉朱洪波于海燕李松邓鑫阳王春凤
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap