Zero-current ripple Buck-Boost converter for photovoltaic power generation
A photovoltaic power generation, zero current technology, applied in photovoltaic power generation, high-efficiency power electronic conversion, conversion of DC power input to DC power output, etc., can solve the problem of difficult to meet the needs of photovoltaic technology, achieve high voltage gain, overcome voltage Low, the effect of improving the service life
Pending Publication Date: 2022-07-12
JIANGNAN UNIV
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Problems solved by technology
Therefore, high-gain DC-DC boost converters play an unavailable role in new energy power generation, and traditional Boost converters have been difficult to meet the needs of photovoltaic technology.
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[0047] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.
[0048] The present application discloses a zero-current ripple Buck-Boost converter for photovoltaic power generation. In the converter, such as figure 1 shown, the coupled inductor primary winding L 1 The first end of the coupled inductor is connected to the secondary winding L 2 The first end of the switch tube S and the first end of the conduction switch tube S and the auxiliary switch tube S b The first end of the coupled inductor primary winding L 1 Connect the second terminal of the output capacitor C o2 The first end of the freewheeling diode D 2 The anode, freewheeling diode D 3 The cathode, the output capacitor C o1 the first terminal and the input power supply V in the negative pole. Freewheeling diode D 2 The cathode of the freewheeling diode D is connected 1 the anode and the capacitor C 2 the first end of the freewheeli...
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The invention discloses a zero-current ripple Buck-Boost converter for photovoltaic power generation, and relates to the field of photovoltaic technology, an active clamping structure in the Buck-Boost converter not only realizes leakage inductance energy circulation and voltage spike limitation, but also forms an input current zero-ripple circuit together with a capacitor C4 and an inductor L0, so that the zero-current ripple Buck-Boost converter can be applied to the photovoltaic power generation. When the input current is greater than the current of the primary winding L1 of the coupling inductor, the redundant current can be released to the capacitor, and when the input current is smaller than the current of the primary winding L1 of the coupling inductor, the insufficient current can be supplemented, and the realization of input zero current ripple is ensured. The high-gain DC / DC converter has the characteristics of high voltage gain, continuous input current, low input current ripple, low output voltage ripple and small coupling transformer winding inductance value, so that the transmission efficiency of photovoltaic power generation energy is effectively improved, and the service life of a photovoltaic power generation cell panel is effectively prolonged.
Description
technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a zero-current ripple Buck-Boost converter for photovoltaic power generation. Background technique [0002] In recent years, the environmental pollution caused by fossil fuels has become more and more serious. Experts and scholars have begun to apply clean energy such as solar energy and wind energy. Among them, solar energy has been widely used. However, the output stage voltage of photovoltaic power generation is low, and a DC-DC boost process is required to connect to the grid. Therefore, high-gain DC-DC boost converters play an inaccessible role in new energy power generation, and traditional boost converters have been difficult to meet the needs of photovoltaic technology. SUMMARY OF THE INVENTION [0003] In view of the above problems and technical requirements, the present inventor proposes a zero-current ripple Buck-Boost converter for photovoltaic power generati...
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IPC IPC(8): H02M3/158H02M1/14H02M1/32H02J3/38
CPCH02M3/1582H02M1/14H02M1/32H02J3/381H02J2300/24Y02E10/56
Inventor 艾建沈晔豪樊启高刘跃跃毕恺韬黄文涛
Owner JIANGNAN UNIV