Method and device for generating quadrature signals
A quadrature signal, preset technology, applied in circuit devices, AC network circuits, electrical components, etc., can solve the problem that the current is not a stable quadrature signal, the frequency of the new energy power generation system is unstable, and the accuracy of the single-phase converter is reduced. problem, to achieve the effect of accurate adjustment
Inactive Publication Date: 2019-11-08
GUANGDONG UNIV OF TECH
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, since the frequency of the new energy power generation system is not stable, it is likely that the current obtained by the above method is not a stable quadrature signal, which reduces the accuracy of the single-phase 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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0044] The core of the present invention is to provide a highly stable quadrature signal generation method and its device, which can generate stable quadrature signals under the condition of unstable frequency.
[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0046] The invention provides a method for generating orthogonal signals, please combine figure 1 , figure 1 Shown is a flow char...
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
Login to View More Abstract
The invention discloses an orthogonal signal generating method and device. The orthogonal signal generating method comprises the steps of collecting grid-side current is(k) and grid-side voltage of the current control period, and storing the grid-side current is(k); performing angle analysis on the grid-side voltage to obtain a phase angle [omega]t and an angular velocity [omega] of the grid-side voltage of the current control period; obtaining the error phase delta[phi] of the phase different under an ideal condition and the phase different under an actual condition between [alpha]-axis current and [beta]-axis current according to the angular velocity [omega]; acquiring a d-axis current calibration parameter Kd and a q-axis current calibration parameter Kq according to the error phase delta[phi] and the phase angle [omega]t; enabling the grid-side current is(k) and stored grid-side current is(k-n) of n control periods before the current control period to respectively act as [alpha]-axis current i'[alpha](k) and [beta]-axis current i'[beta](k) under a static coordinate axis; performing coordinate axis conversion on the [alpha]-axis current i'[alpha](k) and the [beta]-axis current i'[beta](k) to obtain an orthogonal signal under a rotating coordinate system; and calibrating the orthogonal signal according to the d-axis current calibration parameter Kd and the q-axis current calibration parameter Kq to obtain a calibrated orthogonal signal. According to the method provided by the invention, a stable orthogonal signal can be acquired under a condition that the frequency is unstable, so that a single-phase converter applying the method provided by the invention is enabled to adjust grid-side voltage and current parameters more accurately.
Description
technical field [0001] The invention relates to the field of new energy grid-connected power generation systems, in particular to an orthogonal signal generation method and a device thereof. Background technique [0002] As the problem of global warming continues to worsen, the development of clean energy has become one of the hot issues of concern in today's society. New energy such as photovoltaic power generation and wind power generation are common clean energy sources, and their development and application have become an important way for my country's sustainable development . [0003] In recent years, the power generation in the power grid from photovoltaic power generation, wind power generation and other power generation systems has been increasing. However, since the above-mentioned new energy depends on natural factors such as sunlight and wind power, new energy power has time-varying and uncertainties, and the new energy power generation system is quite different ...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/382
Inventor 唐雄民方亦超张淼
Owner GUANGDONG UNIV OF TECH