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Method for improving efficiency of energy router by using low-frequency intermittent technology

A router and low frequency technology, applied in the field of using low frequency intermittent technology to improve the efficiency of energy routers, can solve problems such as reducing system efficiency and increasing system loss, and achieve the effect of improving system operation efficiency, reducing loss, and strengthening engineering practicability

Active Publication Date: 2021-04-02
QINGDAO TOPSCOMM COMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Using the traditional control method, when the system is running at the low frequency of the double frequency envelope of the SRC-DAB (series resonant DAB) resonant current, the power unit is not running at full power, which increases the system loss and reduces the system efficiency

Method used

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  • Method for improving efficiency of energy router by using low-frequency intermittent technology
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  • Method for improving efficiency of energy router by using low-frequency intermittent technology

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] Such as figure 1 As shown, a method for improving the efficiency of energy routers using low-frequency intermittent technology includes the following steps:

[0027] Step 1: The power unit judges the current enable signal form, if it is positive intermittent, then control the power unit to enter pure forward low frequency intermittent mode, if it is reverse intermittent, then control the power unit to enter pure reverse low frequency intermittent mode;

[0028] Step 2: The power unit enters the low-frequency intermittent mode, and receives the sine modulation wave signal value of the carrie...

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Abstract

The invention discloses a method for improving the efficiency of an energy router by using a low-frequency intermittent technology. The method comprises the steps: by employing a low-frequency intermittent technology, determining a low-frequency intermittent point of a resonance current double-frequency envelope through detecting a zero crossing point of a sinusoidal modulation signal, completelyturning off an insulated gate bipolar transistor (IGBT) of a power unit at the low-frequency part of the resonance current double-frequency envelope, and after a set time is over, turning on the IGBTagain, and exiting from the low-frequency intermittent state. According to the invention, the low-frequency intermittent point of the resonance current double-frequency envelope is determined by detecting the zero crossing point of the sinusoidal modulation signal, and the IGBTs of the power unit are all turned off at the moment, so that the loss of the power unit during low-power operation can beeffectively reduced, and the operation efficiency of the energy router system is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of power electronic control, in particular to a method for improving the efficiency of an energy router by using low-frequency intermittent technology. Background technique [0002] With the access of distributed power generation, energy storage systems and various types of loads, traditional power system equipment cannot meet the requirements of diverse power supply forms, multi-directional energy flow, and active control of power flow, and the concept of energy routers has emerged as the times require. The energy router system based on CHB (Cascaded H-Bridge, H-bridge cascading type) + DAB (Dual Active Bridge, dual active full bridge) topology integrates communication unit, control unit and power unit. It can provide flexible and diverse electrification interfaces, realize multi-directional energy flow, facilitate intelligent dispatching and demand-side response, and improve power grid operation level and ...

Claims

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Application Information

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IPC IPC(8): H02M3/335G01R19/175
CPCH02M3/33576G01R19/175Y02B70/10
Inventor 范建华徐鹏飞李鸿儒金绍华赵新举康磊李健勋
Owner QINGDAO TOPSCOMM COMM
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