Fuzzy Control Method for Parallel Power Supply System Considering Efficiency and Current Sharing Index
A technology of power supply system and fuzzy control, applied in the direction of parallel operation of DC power supply, AC network circuit, circuit device, etc. Power supply system can not be realized, high efficiency and other issues
Inactive Publication Date: 2018-11-06
WENZHOU UNIV
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, there are three problems as follows: 1. The current sharing performance of the parallel power supply system cannot be achieved in a good state; 2. The parallel power supply system cannot achieve high efficiency; 3. The evaluation and optimal scheduling of the operating performance of each power module cannot be realized. It cannot ensure that the current sharing performance of each power module meets the requirements
[0005] However, by retrieving existing papers and patents, it is found that a reliable and practical parallel power supply system control method has not been found to achieve the optimization of system efficiency and current sharing comprehensive performance indicators and the optimal scheduling of each online power module
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
[0073] Embodiments of the present invention will be further described below with reference to the accompanying drawings:
[0074] The invention provides a fuzzy control method for a parallel power supply system taking into account both efficiency and current sharing index. figure 1 Shown is the structure diagram of the parallel power supply system efficiency and current sharing comprehensive performance test system, figure 2 Shown is the structure diagram of the parallel power supply system, Figure 3 is the fuzzy control membership function, Figure 4 is a fuzzy rule table. figure 1 The main function is to obtain the functional relationship between the efficiency of the parallel power supply system and the load current η=Φ(i) and the mathematical relationship between the mathematical expectation average value of the relative deviation of the module current sharing and the load current and determine the optimum load current for each and figure 1 It mainly includes uppe...
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 relates to a fuzzy control method for a parallel power supply system that takes into account both efficiency and current-sharing indicators. The expression η=Φ(i) between the efficiency η and the load current i of the power supply module and the mathematical expected average value θ of the current-sharing relative deviation and On the basis of the expression θ=Ψ(i) between the load current i of the power module and the corresponding optimal point sum, take the current average current value Ishare of the system as input, and obtain the output μΦ(Ishare) of the membership function of Ishare and the degree of deviation and the output μΨ(Ishare) of the membership function of Ishare and degree of deviation, and according to the fuzzy control rule table, the expected average current adjustment value ΔI is obtained, and then the number of modules is adjusted to ensure that the system works in a relatively high efficiency and comprehensive performance index of current average. High level, to ensure that the system efficiency and current-sharing comprehensive performance are at a high-level target, by calculating the mathematical expectation of the deviation between the output current of each power module and the current-sharing target value Ishare, online power modules and backup power supplies that do not meet the performance requirements The modules are optimized and dispatched to realize that both the parallel power supply system and the online power supply modules work near the optimal point of performance.
Description
technical field [0001] The invention relates to a fuzzy control method for a parallel power supply system that takes into account both efficiency and current sharing indicators, and is used for the optimal control of the operating quantity of power supply modules in the parallel power supply system and the optimal scheduling of the power supply modules, ensuring that the efficiency and current balance synthesis of the parallel power supply system are taken into account under different load conditions performance, this method is also applicable to the requirements of efficiency and current sharing performance indicators for parallel operation of other electronic equipment. Background technique [0002] The high-power parallel power supply is a parallel output structure of multiple power modules. Because of its strong compatibility, N+m redundant backup, strong reliability, high cost performance, low design difficulty, and easy management, it has become a solution One of the p...
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): H02J1/10H02J3/46
CPCH02J1/10H02J3/46H02J2203/20
Inventor 刘文文彭志辉潘晓铭潘敏辉瞿建武刘书华
Owner WENZHOU UNIV