Non-current-sharing parallel DC transformation control apparatus and method

A DC conversion and control device technology, applied in the field of power electronics, can solve problems such as inability to distribute current/power, and inability to effectively control the direction of energy flow, so as to achieve the effects of improving energy utilization efficiency, prolonging service life, and enhancing dynamic performance

Active Publication Date: 2016-12-21
GUANGDONG HUST IND TECH RES INST
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Problems solved by technology

[0004] Although this multi-energy source parallel system has the above-mentioned advantages, in practical applications, the current technology is to output parallel currents between multiple energy sources, which cannot distribute current/power and effectively control the direction of energy flow. For the complementary application of multiple energy sources, the distribution of current and power output must be carried out for energy sources with different characteristics

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  • Non-current-sharing parallel DC transformation control apparatus and method
  • Non-current-sharing parallel DC transformation control apparatus and method
  • Non-current-sharing parallel DC transformation control apparatus and method

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[0026] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0027] As attached figure 1 As shown, the present invention discloses a non-current-sharing parallel DC conversion control device, which includes a bus bar and at least two DC energy sources, and also includes a bidirectional DC converter with the same number of DC energy sources and a control system. Bus connection, a DC energy source corresponds to a bidirectional DC converter and a control system, each DC energy source is connected in series with the corresponding bidirectional DC converter and then connected in parallel with the bus; the control system is connected to the bidirectional DC converter through the PWM adjustment module, The control system includes a voltage regulator, a low-pass filter, and a current regulator connected in series via a line, and the current regulator is connected to a bidire

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Abstract

The invention discloses a non-current-sharing parallel DC transformation control apparatus and method. The apparatus comprises a bus and at least two DC energy sources, and is characterized by further comprising bidirectional DC converters and control systems which have the same quantity of DC energy sources, wherein the bidirectional DC converters are connected with the bus, one DC energy source is corresponding to one bidirectional DC converter and one control system, and each DC energy source, after being connected in series with the corresponding bidirectional DC converter, is connected in parallel with the bus; and the control systems are connected with the bidirectional DC converters through PWM adjustment modules, the control systems comprise voltage regulators, low-pass filters and current regulators which are successively connected in series through lines, and the current regulators are connected with the bidirectional DC converters through the PWM modules. According to the invention, online filter weight coefficient adjustment can be carried out according to real-time energy states and output features of the energy sources, performance complementation between the different energy sources is realized, the utilization efficiency of energy is improved, the service life is prolonged, and the dynamic performance is enhanced.

Description

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Application Information

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Owner GUANGDONG HUST IND TECH RES INST
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