DAB converter power control method based on power feedforward, medium and equipment
A power control and converter technology, applied in the field of DC micro-grid, can solve the problems of low transmission power control efficiency, slow response of dual active bridge converters, etc., and achieve easy calculation, improved stability and dynamic performance, and improved effect of ability
Pending Publication Date: 2021-12-17
XI AN JIAOTONG UNIV
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Problems solved by technology
[0003] In order to solve the problems existing in the prior art, the present invention provides a DAB converter power control method, medium and equipment based on power feedforward, which solves the problem of the low transmission power control efficiency of the current dual active bridge converter, and the sudden change in the power command or The whole dual active bridge converter responds slowly when reversed suddenly
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[0066] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0067] The invention provides a DAB converter power control method based on power feedforward, which can directly and efficiently control the transmission power of the DAB converter, and realize rapid and accurate system response when the power command changes abruptly or suddenly reverses. In this way, efficient and accurate power bidirectional transmission control in the DC microgrid is realized. The techniques of phase shift modulation of DAB converter mainly include single phase shift (SPS), extended phase shift (EPS), double phase shift (DPS) and triple phase shift (TPS) modulation. In the present invention, for the sake of simplicity, the most widely used single phase-shift modulation is applied to the DAB converter. During each switching cycle, the AC voltage v across the magnetic network p and v s The phase shift angle between Ther...
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The invention discloses a DAB converter power control method based on power feedforward, a medium and equipment. The method comprises the following steps of giving an output power reference value of a dual active bridge converter and sampling an input voltage, an output voltage and an output current of the dual active bridge converter, calculating a feedforward phase shift angle of the dual active bridge converter according to the input voltage, the output voltage and the output power reference value of the dual active bridge converter, calculating a feedback phase shift angle of the dual active bridge converter according to the output current, the output voltage and the output power reference value of the dual active bridge converter, adding the feedforward phase shift angle and the feedback phase shift angle of the dual active bridge converter to obtain a phase shift angle between two H bridges of the dual active bridge converter, and enabling a switching tube in the dual active bridge converter to act in sequence according to a phase-shift angle based on a single phase-shift modulation mode to control the power output of the dual active bridge converter. The output efficiency of the dual active bridge converter can be directly and efficiently controlled, and two-way transmission of power is accurately realized.
Description
technical field [0001] The invention belongs to the technical field of DC microgrids, and in particular to a power feedforward-based DAB converter power control method, medium and equipment. Background technique [0002] With the development of new energy sources, DC microgrids have attracted extensive attention due to their advantages of high efficiency, no reactive power requirements, and no need for AC-DC or DC-AC conversion. Due to its bi-directional power transmission capability and flexible adjustment characteristics, the energy storage system integrated with the DC microgrid is becoming more and more popular. In order to realize DC bus connection, voltage conversion, electrical isolation and bidirectional power transmission in DC microgrid, a high frequency isolated bidirectional DC-DC converter is an essential device. Dual Active Bridge (DAB) DC converter has the advantages of bidirectional power flow, simple structure, flexible control, and high efficiency. In add...
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IPC IPC(8): H02M3/335H02J1/10
CPCH02M3/33584H02J1/102
Inventor 雷万钧肖钟秀张枭项张威李瑞祥刘旖琦
Owner XI AN JIAOTONG UNIV