DAB converter wide-range regulation and control method based on multi-mode model prediction

A model prediction and converter technology, applied in output power conversion devices, DC power input conversion to DC power output, instruments, etc., can solve problems such as self-parameter disturbances, external load disturbances, and the inability to guarantee the operation of DAB converters

Active Publication Date: 2020-10-23
STATE GRID LIAONING ELECTRIC POWER RES INST +1
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Problems solved by technology

[0006] A big problem with model predictive control is that it depends on the accuracy of the model parameters, but in the actual working environment, due to the disturbance of its own parameters and external load disturbances caused by complex conditions of temperature and stray loss, it is necessary to control the DAB Transformer parameters are identified online to improve tracking performan...

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  • DAB converter wide-range regulation and control method based on multi-mode model prediction
  • DAB converter wide-range regulation and control method based on multi-mode model prediction
  • DAB converter wide-range regulation and control method based on multi-mode model prediction

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Embodiment Construction

[0055] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0056] A wide-range control method for DAB converter based on multi-mode model prediction, figure 1 It is a flow chart of a DAB converter wide-range control method based on multi-mode model prediction in the present invention. The secondary side real-time voltage and voltage given value are obtained through voltage collection; the voltage range is judged, and the mode type is selected according to the voltage fluctuation. When the voltage fluctuation is 10% or more, select mode A, and the control strategy of mode A is the dual-objective optimization of the coordinated control of current stress optimization strategy and model predictive control strategy; when the voltage fluctuation is within 5% to 10%, select mode B , the control strategy of mode B is the same as that of mode A, on this basis, the improved Kalman filter is introduced to id...

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Abstract

The invention provides a DAB converter wide-range regulation and control method based on multi-mode model prediction, and relates to the technical field of new energy and direct-current microgrid conversion. By adopting multi-mode control, a DAB converter can operate in a wider voltage range, different control targets are optimized through mode recognition, the method is more suitable for complexworking conditions, and normal operation of the DAB converter is maintained. A mode A, a mode B and a mode C are adopted to carry out wide-range regulation and control on the DAB converter, the transmission efficiency and the dynamic response of the DAB converter are improved, and the calculated amount is reduced under the condition that no Kalman filter exists and steady-state operation is not influenced. The dynamic performance, the steady-state transmission efficiency and the robustness of the DAB converter can be effectively improved in a wide range.

Description

technical field [0001] The invention relates to the technical field of new energy and DC micro-grid conversion, in particular to a wide-range control method for a DAB converter based on multi-mode model prediction. Background technique [0002] With the gradual depletion of fossil energy, countries have begun to attach importance to the development of clean energy and non-fossil energy. After decades of development, renewable energy can now be connected on a large scale and promote the transition from traditional power grids to smart grids, which is in line with current national policies. Require. At present, the most widely used form is the DC microgrid, one of which is the direct-to-direct conversion as the interface of photovoltaic arrays, fuel cells, and high-power energy storage capacitors. At the same time, the DC-DC converter in the field of electric vehicles is also one of the hotspots worldwide. In the field of electric vehicle charging station conversion technolog...

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33576H02M1/0003H02M1/0025
Inventor 张钊孙秋野王盼峰张潇桐马大中王刚孙家正孙峰蔡智阳黄雨佳李胜辉张佳豪戈阳阳谢赐戬付尧赵清松
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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