An Isolated Bidirectional DC-DC Efficiency Optimization Method Based on Simulated Annealing-Hill Climbing Hybrid Algorithm
A simulated annealing algorithm and simulated annealing technology, which are used in output power conversion devices, DC power input to DC power output, instruments and other directions, which can solve the problems of different phase shift angle and duty cycle transmission efficiency.
Active Publication Date: 2021-01-15
NANJING UNIV OF POSTS & TELECOMM
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The phase-shift strategy control effectively improves the transmission efficiency of the isolated bidirectional DC-DC converter, but in order to find the combination of phase-shift angle and duty cycle with the highest transmission efficiency, it is necessary to derive a complex formula Formula, PWM plus phase-shift strategy control isolated bidirectional DC-DC converter under the condition of constant output voltage, there are many combinations of different phase-shift angles and duty ratios that meet the requirements, but the phase-shift angles and duty cycles of different combinations Different air ratio transfer efficiencies
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[0015] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with examples, which are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.
[0016] Such as Figure 1-2 As shown, this embodiment provides an isolated bidirectional DC-DC efficiency optimization method based on a simulated annealing-hill climbing hybrid algorithm. Correct for phase shift angle and duty cycle. The specific steps of the optimization method are as follows: use the simulated annealing algorithm to obtain a correction starting point: initialize multiple combinations of phase shift angles and duty ratios and calculate their transmission efficiency, and then obtain a correction point near the current optimal phase shift angle and duty ratio combination Generate a new combination of phase shift angle and duty cycle, calculate the new transmission efficie...
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The invention provides an isolated bidirectional DC-DC efficiency optimization method based on a simulated annealing-hill climbing hybrid algorithm. The optimization method is as follows: firstly, a simulated annealing algorithm is used to provide a correction starting point for a hill climbing method; and then, the hill climbing method is used to correct a phase-shift angle and a duty cycle. Input and output voltage and current values under multiple different phase-shift angles and duty cycles are sampled, different phase-shift angle and duty cycle combinations are used as solutions in the simulated annealing-hill climbing algorithm, transmission efficiency is used as an evaluation function value, and the transmission efficiency of the circuit under different phase-shift angles and duty cycles is calculated and compared. The simulated annealing algorithm is firstly used to solve a group of phase-shift angles and duty cycles with good transmission efficiency, the hill climbing method is then used to further correct the phase-shift angles and the duty cycles, a phase-shift angle and duty cycle combination with the maximum transmission efficiency is finally acquired, and efficient power transmission is realized.
Description
technical field [0001] The invention relates to the field of bidirectional DC-DC converters, in particular to an isolated bidirectional DC-DC efficiency optimization method based on a simulated annealing-hill climbing hybrid algorithm. Background technique [0002] With the development of charging and discharging technology, the application of bidirectional DC-DC converters is becoming more and more popular. Among them, the isolated bidirectional DC-DC controlled by phase shift strategy stands out because of its safety and high efficiency. The phase-shift strategy control effectively improves the transmission efficiency of the isolated bidirectional DC-DC converter, but in order to find the combination of phase-shift angle and duty cycle with the highest transmission efficiency, it is necessary to derive a complex formula Formula, PWM plus phase-shift strategy control isolated bidirectional DC-DC converter under the condition of constant output voltage, there are many combin...
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IPC IPC(8): H02M3/335
CPCH02M3/33584
Inventor 周岩李子硕
Owner NANJING UNIV OF POSTS & TELECOMM