Bidirectional converter control device
A bidirectional converter and control device technology, which is applied in the output power conversion device, the conversion of AC power input to DC power output, and the load balancing of the AC network, etc.
Inactive Publication Date: 2012-09-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF3 Cites 18 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, with the expansion of scale, the impact of distributed generation on the grid is also increasing
The connection of various distributed power generation systems will cause harmonic pollution of the power grid, which will have a negative impact on the large power grid; secondly, the distributed power generation system is greatly affected by factors such as weather, seasons, and daylight, and the power supply is unstable, which is easy cause fluctuations in the grid
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
[0041] figure 1 It is the structure diagram of the main circuit of the bidirectional converter.
[0042] Such as figure 1 As shown, the main circuit of the bidirectional converter includes an energy storage battery 11, a DC side capacitor 12, an IGBT module 13, an equivalent internal resistance of a filter inductor 14, a filter inductor 15, and a grid 16, wherein V1~V6 are six IGBT modules.
[0043] figure 2 It is a structural block diagram of a specific embodiment of the bidirectional converter control device of the present invention.
[0044] In this implementation, if figure 2 As shown, the bidirectional converter control device includes a DC voltage PID controller 1, a DC current limiting module 2, a DC current PID controller 3, an AC current limiting module 4, an AC current inner loop module 5, and a DC voltage sensor DVT 6 , a DC current sensor DCT 7 , an AC voltage and current acquisition module 8 , and a coordinate system transformation module 9 .
[0045] The D...
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 bidirectional converter control device. A serial structure consisting of a direct-current voltage outer ring, a direct current intermediate ring and an alternating current inner ring is adopted to realize unified control of rectification and inversion bidirectional conversion, the direct-current voltage outer ring consists of a direct-current voltage PID (proportion integration differentiation) controller and a direct-current amplitude limiting module, the direct current outer ring comprises a direct current PID controller and an alternating current amplitude limiting module, and an alternating current inner ring module is used as the alternating current inner ring of the control device. The bidirectional converter control device can realize a state adaptive switching function in a charge-discharge process according to power scheduling instructions, namely charge-discharge active power Pref and charge-discharge capacity, which refers to charging cut-off voltage and discharging cut-off voltage, of an energy storage battery. Unified control of rectification and inversion bidirectional conversion and smooth switching are realized, the stability and the reliability of a bidirectional converter are improved, and debugging difficulty of the bidirectional converter is reduced.
Description
technical field [0001] The invention belongs to the technical field of bidirectional converters, and more specifically relates to a control device for bidirectional converters. Background technique [0002] Due to energy shortage in the 21st century, it is imperative to vigorously develop green new energy. The development of new energy sources such as wind energy, solar energy, biomass energy, and ocean energy can effectively solve the problem of energy shortage. Therefore, distributed power generation systems based on these new energy sources have been developed rapidly. However, as the scale expands, the impact of distributed power generation on the grid is also increasing. The connection of various distributed power generation systems will cause harmonic pollution of the power grid, which will have a negative impact on the large power grid; secondly, the distributed power generation system is greatly affected by factors such as weather, seasons, and daylight, and the po...
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): H02J3/32H02M7/797
Inventor 李凯邹见效郑宏徐红兵徐伟烽
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA