Method for Determination of Current Sharing Reactor Value in Converter with Multiple Power Modules Connected in Parallel
A technology of power module and determination method, applied in the direction of measuring resistance/reactance/impedance, instruments, measuring electrical variables, etc., can solve the problems of large reactor loss, affecting the current sharing effect, large volume, etc., to achieve a simple and accurate implementation method The effect of high density and reduction of system volume
Active Publication Date: 2018-01-09
ZHUZHOU CSR TIMES ELECTRIC CO LTD
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, when connecting current-sharing reactors between parallel modules, ordinary reactors are usually used. There are problems such as large reactor loss, large volume, and high cost. Moreover, the current-sharing reactors are all based on empirical values, and there is no set of them yet. Standardized and scientific methods are used to determine the value, and the value of the current sharing reactor will directly affect the current sharing effect
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
[0053] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.
[0054] Such as figure 2 As shown, the method for determining the value of the current sharing reactor in the converter with multiple power modules connected in parallel in this embodiment includes:
[0055] 1) Establish the current sharing equivalent model when the current sharing reactor is connected between two parallel power modules to achieve current sharing, and the value of the current sharing reactor and the difference between the two power modules when the current sharing is achieved can be obtained from the current sharing equivalent model. The relationship between the output voltage difference and the size of the circulating current;
[0056] 2) Obtain the output voltage and output current of the two target power modules connected to the current-shar...
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 determining the value of a current sharing reactor in a converter in which multiple power modules are connected in parallel. Equivalent model, the relationship between the current sharing reactor value and the output voltage difference between the two power modules and the size of the circulating current when the current sharing is achieved is obtained from the current sharing equivalent model; Calculate the output voltage and output current of the two target power modules connected to the converter, and calculate the output voltage difference and the magnitude of the circulating current, and then determine the corresponding current-sharing reactor value according to the relationship obtained in step 1). The invention has the advantages of simple implementation method, direct determination of the value of the current sharing reactor required to achieve current sharing among the power modules in the converter, and high accuracy of the value of the current sharing reactor.
Description
technical field [0001] The invention relates to the technical field of urban rail transit, in particular to a method for determining the value of a sharing reactor in a converter with multiple power modules connected in parallel. Background technique [0002] Urban rail transit in the 21st century is a green transportation system with the goal of energy conservation and environmental protection. In the entire urban rail transit system, the energy consumption of vehicles generally exceeds 50% of the energy consumption of the entire system. With the rapid development of urban rail transit technology, there are more and more researches on the energy absorption and utilization of urban rail vehicles during braking. Parallel connection of multiple inverter modules can increase the capacity of the UPS and improve the reliability of the UPS. However, the output current of each inverter module is inconsistent when the inverters are connected in parallel. The output current of the c...
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): G01R27/26
Inventor 王雄翁星方谢湘剑林文彪张祥唐龙宋乾儒董其爱邹今换孙林
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD