Check patentability & draft patents in minutes with Patsnap Eureka AI!

Adaptive reactive power control method of parallel inverter

A power control and inverter technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve high cost and other problems

Inactive Publication Date: 2014-04-02
XI AN JIAOTONG UNIV
View PDF6 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during normal operation, this method needs to collect the voltage of the common connection point at all times, and collecting such high-frequency signals for control will pay a high price

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
  • Adaptive reactive power control method of parallel inverter
  • Adaptive reactive power control method of parallel inverter
  • Adaptive reactive power control method of parallel inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0056] The basic idea of ​​the adaptive reactive power control method for parallel inverters in the present invention is as follows. Inspired by the expression of reactive power in (3), if it is possible to control is a constant K, which is the slope of the actual reactive power-voltage droop curve:

[0057] Z n U n + k q = K - - - ( 9 )

[0058] Then formula (3) will become:

[0059] Q n = U r + k q Q r ...

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 an adaptive reactive power control method of a parallel inverter. The method comprises the steps of figuring out virtual reactive power according measured power and performing adaptive regulation to output voltage in combination with the magnitudes of actually output voltage amplitude and line impedance, wherein the adaptive regulation refers to compensating the voltage which is dropped from the line impedance according to an output voltage command. By automatically regulating the output voltage to enable the reactive power to be equally divided, signals except local information are not required to be acquired, the voltage deviation is not increased and the inverter can be enabled to achieve the goal of accurately and equally dividing the reactive power or allocating the reactive power according set proportions under the situation that the line impedance is different.

Description

technical field [0001] The invention relates to the field of inverter wireless parallel control, in particular to an adaptive reactive power control method for parallel inverters applied to UPS parallel power supply systems, distributed power generation and microgrid systems. Background technique [0002] Droop control is a mainstream inverter parallel control method that does not require communication lines. In a parallel system with multiple inverters, according to KCL and KVL, for any nth inverter, its output power can be expressed by formula (1). [0003] [0004] Among them, U L is the voltage amplitude of the common load terminal, is the phase difference between the inverter output voltage and the common load terminal voltage. From formula (1), it can be obtained that the reactive power is proportional to the voltage amplitude difference, and the active power is proportional to the voltage phase difference. Considering that the change of frequency can change the...

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
IPC IPC(8): H02M7/493
Inventor 游致远刘进军张轩武腾
Owner XI AN JIAOTONG UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com