Working direction smooth switching control method for bidirectional resonant CLLC circuit

A technology of smooth switching and control methods, which is applied in the field of electric power industry, can solve problems such as restricting applications and inability to realize smooth switching of circuits, and achieve the effect of energy scheduling

Active Publication Date: 2019-05-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in some occasions that require fast and stable switching of the working direction, such as energy storage equipment scheduling, electric vehicle V2G technology, and energy feedback, only bidirectional active bridge circuits can be used.
However, the traditional two-way resonant CLLC circuit cannot realize the smooth switching of the working direction of the circuit, which restricts its application in these occasions.

Method used

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  • Working direction smooth switching control method for bidirectional resonant CLLC circuit
  • Working direction smooth switching control method for bidirectional resonant CLLC circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1, bidirectional resonant CLLC circuit controller, is applicable to bidirectional resonant CLLC circuit, as figure 1 As shown, the bidirectional resonant CLLC circuit includes a primary side bridge, a secondary side bridge and a CLLC resonant cavity. The controller generates circuit control signals for control according to the circuit state and externally transmitted or internally preset reference signals.

[0034] The primary side bridge includes a first bridge arm and a second bridge arm connected in parallel, wherein the first bridge arm includes a first switching tube Q1 and a second switching tube Q2 connected in series, and the second bridge arm includes a first switching tube Q2 connected in series. The third switching tube Q3 and the fourth switching tube Q4. There is a first node A between the first switching tube Q1 and the second switching tube Q2, the first node A is electrically connected to one end of the primary side of the CLLC resonant cavit...

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PUM

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Abstract

The invention provides a working direction smooth switching control method for a bidirectional resonant CLLC circuit, comprising the following steps that 1, a controller detects a current circuit state and controls the bidirectional resonant CLLC circuit to operate in a forward working state by a primary-side bridge and a secondary-side bridge; 2, when an externally transmitted reference signal ora reference signal preset in the controller received by the controller is a working direction switching signal, the step 3 is executed; 3, the controller performs frequency conversion control; 4, thecontroller performs a phase shift control preparation operation, and generates a driving signal of the secondary-side bridge; and 5, the controller performs phase shift control; and 6, the circuit working state is switched to a reverse working mode. The control method of the invention combines the frequency conversion control and the phase shift control to realize, without using additional hardware, a function of switching the working direction of the bidirectional resonant CLLC circuit which cannot be realized by the conventional frequency conversion control.

Description

technical field [0001] The invention relates to a control method for smooth switching of working directions applied to a bidirectional resonant CLLC circuit, relates to the operation mode control of a bidirectional resonant CLLC circuit, belongs to the application field of DCDC converters, involves bidirectional flow of electric energy, and involves multiple application occasions at the same time , especially the dispatch management of energy storage equipment, belongs to the field of electric power industry. Background technique [0002] Energy Internet is the future development trend of the power industry. Large-scale centralized new energy power generation, distributed power generation, power grid frequency modulation services, and micro-grid technology are developing rapidly, and the demand for energy storage equipment is huge. Adding energy storage equipment to the power system can stabilize the volatility caused by large-scale new energy generation connected to the gri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33584H02M1/0058Y02B70/10H02M3/33592
Inventor 李博栋陈敏荆磊汪小青陈宁孙欣楠张东博
Owner ZHEJIANG UNIV
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