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Simulated voltage generation device for inverter grid-connection experiment

A technology for simulating voltage and generating devices, applied in measuring devices, parts and instruments of electrical measuring instruments, etc., can solve problems such as the inability to accurately and truly reflect the characteristics of grid-connected inverters and the inability to continuously adjust the voltage.

Inactive Publication Date: 2015-06-24
XIAN XINWEI INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it has only a finite number of discrete points, the voltage cannot be continuously adjusted
This voltage environment is far from the actual voltage environment of the grid-connected inverter, so this measurement cannot accurately and truly reflect the characteristics of the grid-connected inverter

Method used

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  • Simulated voltage generation device for inverter grid-connection experiment
  • Simulated voltage generation device for inverter grid-connection experiment
  • Simulated voltage generation device for inverter grid-connection experiment

Examples

Experimental program
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Effect test

Embodiment 1

[0017] An analog voltage generating device for inverter grid-connected experiments, which includes: a main control unit, a D / A and a voltage forming circuit, a D / A and a waveform reference forming circuit, a precision voltage regulator, and a man-machine interface; The characteristics are: the precision voltage stabilizer generates the precise voltage reference and then sends it to the D / A and voltage forming circuit, and the main control unit controls the generation of the waveform reference to generate the required voltage waveform in the D / A and voltage forming circuit, and the man-machine interface Connected with the main control unit including keys and display.

[0018] An analog voltage generating device used for inverter grid-connected experiments is mainly completed by integrated circuits in circuit design, especially the main control chip is controlled by single-chip microcomputer AT89C51. The main control chip has good stability and fast response, and can control the...

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PUM

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Abstract

The invention provides a simulated voltage generation device for inverter grid-connection experiment. The simulated voltage generation device comprises a square-wave generator, a pre-value frequency divider, a phase-locked loop, a programmable address generator, a dual-port RAM, a main control unit, a D / A and voltage forming circuit, a D / A and waveform reference forming circuit, a precision voltage stabilization source, and a man-machine interface. The simulated voltage generation device is characterized in that a square-wave signal generated by the square-wave generator enters the pre-value frequency divider controlled by the main control unit and then enters the phase-locked loop controlled by the main control unit so as to generate a needed frequency signal which is then sent to the dual-port RAM by the address generator; a signal generated by the dual-port RAM enters the D / A and waveform reference forming circuit, and a waveform reference generated by the precision voltage stabilization source enters the D / A and voltage forming circuit so as to generate a needed voltage waveform; and the man-machine interface is connected with the main control unit, and comprises keys and a display.

Description

technical field [0001] The invention belongs to the technical field of power electronics and relates to a power supply device, in particular to an analog voltage generating device used for grid-connected experiments of inverters. Background technique [0002] An inverter is a device that converts DC power into AC power. The most widely used device that converts DC power into power frequency AC power. [0003] The solar photovoltaic power generation system produces direct current power. In order to meet the requirements of users, the inverter needs to convert the direct current power into power frequency alternating current power to meet the power supply requirements of many AC appliances. The AC power output by the inverter is connected to the public grid, and must meet the conditions of the same frequency and the same phase, and the purpose of transmitting power to the grid is achieved by adjusting the voltage. Therefore, the function and performance requirements of photo...

Claims

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Application Information

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IPC IPC(8): G01R1/28
Inventor 王方李晓飞
Owner XIAN XINWEI INFORMATION TECH
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