One-phase inverter control method
A single-phase inverter and control method technology, applied in the field of power electronics, can solve the problems of unfavorable new energy and distributed energy inflow and use, the overall stability of the power system is reduced, etc., to improve dynamic adjustment performance, good The effect of overall stability and fast response speed
Active Publication Date: 2019-04-26
成都拓及兴通科技有限公司
View PDF5 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Among them, the current source control scheme can realize the utilization and injection of maximum energy, but it is not conducive to the massive import and use of new energy and distributed energy, and may lead to a decline in the overall stability of the power system
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
[0026] The specific content and implementation of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0027] First, the grid side voltage v g An amplitude calculation (AMPlitude calculation, AMP) process is described as an example. The grid side voltage v g with v g =V g *sin(ω g Expressed in the form of t), where V g is the grid side voltage v g Amplitude of , ω g t is its phase.
[0028] It is necessary to detect and acquire the phase ω of the grid-side voltage through a single-phase phase-locked loop (Phase Locked Loop, PLL) g t, the sinusoidal output sin(ω g t), put v g and sin(ω g t) multiplied together, the calculation result is:
[0029]
[0030] It can be seen that the calculation result only includes the double frequency component and the DC component. Through the low pass filter (Low PassFilter, LPF), set the cutoff frequency of the low pass filter to 60Hz, which is less than t...
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 provides a one-phase inverter control method. The one-phase inverter control method mainly comprises a one-phase lock loop, an amplitude calculation module, a reactive power-amplitude control module, an active power-frequency control module, a phase position adjusting module and a calculation module of an electromagnetic torque, reactive power and electromotive force. Mathematical models of the active power-frequency control module, the reactive power-amplitude control module and the calculation module of the electromagnetic torque, the reactive power and the electromotive forceare established referring to mechanical and electrical models of a synchronous generator to enhance inertance and damping of an inverter, and the inverter can have output characteristics the same as or similar to the synchronous generator. According to the one-phase inverter control method, fitting of a voltage and current from one phase to three phases or two phases is not required, and calculation is carried out by directly using the actual one-phase voltage and current; conversion of a coordinate system is not involved in the calculation process; a novel phase position tracking control method is designed; and compared with an existing control scheme, the one-phase inverter control method has higher dynamic response speed and good integral stability.
Description
technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to the control technology of a single-phase inverter. Background technique [0002] At present, distributed energy resources can reduce the loss of energy in the long-distance transmission process through the fragmented arrangement of energy transmission and utilization, effectively improving the security and flexibility of energy utilization. Therefore, the application and promotion of clean energy and distributed energy is the backbone of the energy revolution. [0003] The power electronic converter can flexibly convert and control electric energy, transform the energy of clean energy and distributed energy, integrate it into the grid, and manage it effectively. At present, the inverter control for renewable energy can be mainly divided into two types: current source type and voltage source type. Among them, the current source control scheme can realize th...
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 Applications(China)
IPC IPC(8): H02M7/48H02M7/487H02J3/38
CPCH02J3/38H02M7/48H02M7/487
Inventor 何晓琼王怡韩鹏程彭俊舒泽亮
Owner 成都拓及兴通科技有限公司