A Method for Suppressing Output Power Unbalance of Inverter Parallel System
A technology of output power and inverter, which is applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., and can solve problems such as current sharing difference, response lag, and parallel system output power imbalance. , to achieve the effects of fast response, fast process, and low hardware equipment requirements
Active Publication Date: 2015-11-04
STATE GRID CORP OF CHINA +3
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In view of the above problems, the present invention provides a method for suppressing the unbalanced output power of the parallel inverter system. Feedforward control is adopted to directly adjust and control the controlled quantity according to the disturbance signal. There are problems of response lag and poor current sharing in the inverter parallel system, which can improve the reliability of power supply in the new urban power distribution network
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
[0030] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0031] In the new urban distribution network, many clean energy sources use distributed power multi-inverter parallel technology, which leads to the problem of unbalanced output power on the AC side of the multi-inverter, such as figure 1 Shown is a topology diagram of a parallel system with two three-phase grid-connected inverters.
[0032] figure 1 In the above, two sets of three-phase full-bridge inverter circuits form a parallel system of three-phase grid-connected inverters, and the full-bridge inverter structure of each set of inverters adopts the classic topology of six anti-parallel diodes. This system is a distributed power generation ...
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 a method for restraining output power imbalance of an inverter parallel system. Feedforward control is adopted, controlled variables are directly regulated and controlled according to disturbing signals, regulating and controlling rapidity is good, the problem that the distribution power supply multi-inverter parallel system has response lag and poor current sharing is solved, and power supply reliability of a novel city and town power distribution network is improved. Certain complex controllers are omitted, requirements for hardware equipment are low, the number of current sensors is reduced, and the stability of the system is enhanced. In the novel city and town power distribution network, system access capacity is enhanced, the progress of distributed generation modules is facilitated, and losses of the system are reduced.
Description
technical field [0001] The invention relates to a method for suppressing output power unbalance of an inverter parallel connection system. Background technique [0002] The new urban distribution network is a huge carrier of distributed power. How to use distributed clean energy more reasonably and efficiently, expand access capacity and improve power level has become the focus of current research in the field of new energy distributed photovoltaic power generation. A large number of new energy sources such as solar thermal power generation and photovoltaic power generation need to pay more attention to the reliability of power supply. In addition, due to the limitations of power electronic devices, a large number of distributed energy sources need to be connected in parallel to the new urban distribution network. The topological structure mode, and the parallel operation of multiple inverters will inevitably bring about the reliability of distributed power generation access...
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): H02M7/493
CPCH02M7/493
Inventor 陈泾生王建明周建华陈久林孙蓉张佑鹏孙国城袁晓冬
Owner STATE GRID CORP OF CHINA