Control method of power converter for converting input high-frequency alternative-current square wave into output direct current
A power converter, high-frequency AC technology, applied in the direction of converting DC power input to DC power output, AC power input converting to AC power output, output power conversion device, etc., can solve problems such as waste of resources, and achieve cost savings , The effect of a simple DC voltage conversion circuit
Active Publication Date: 2015-03-18
JIANGSU HUASHENG ELECTRICAL CO LTD
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Problems solved by technology
At present, the existing DC output converter device without energy storage system for new energy power generation and grid complementary power supply can only flow energy from the side of the new energy power generation device and the grid side to the side of the DC load. ) can provide a maximum power greater than the load demand, the grid stops supplying energy to the load, and the photovoltaic cell can only operate at a point less than the maximum power, which causes a waste of resources
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[0021] The control device of the inventive high-frequency AC square wave input-DC output power converter will be described in detail below in conjunction with the accompanying drawings.
[0022] The inventive device such asfigure 1 Shown in (a), the specific circuit of applying the device of the present invention to the high-frequency pulse AC link inverter (HFPALI) is as follows figure 1 As shown in (b), after adding the DC power supply converter, the utilization rate of the power converter in the new energy power generation system is directly improved, and it will promote the development of the new energy industry. The present invention utilizes the inductance L 1 , L 2 and capacitance C 1 The impedance converter composed of high-frequency AC square wave input voltage u i The current source i converted to the output of the impedance converter 2 ; Inductance L 1 One end is connected to high-frequency input AC voltage source A1 point, and the other end is connected to cap...
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The invention discloses a power converter for converting input high-frequency alternative-current square wave into output direct current and a control method thereof and belongs to the technical field of power electronics. The converter comprises high-frequency alternative-current square wave input voltage, an immittance converter and a direct-current output converter. The method includes that a high-frequency alternative-current voltage source is converted into a high-frequency alternative-current current source through the immittance converter, and high-frequency alternative current can be converted into adjustable direct-current output voltage only by adopting one-level power conversion. The power converter and the control method have the advantage of being single-level in power conversion, high in converting efficiency, small in device withstanding voltage stress, small in size and light in weight. In the aspect of controlling, a complex signal modulation mode is avoided, and control of a circuit can be achieved only by using one set of phase shifting device. The power converter and the control method are suitable for situations with high-frequency alternative-current voltage and requiring a direct-current power supply in a system.
Description
technical field [0001] The invention relates to a control method of a high-frequency AC square wave input-DC output power converter, belonging to the technical field of power electronic converters and their control. Background technique [0002] The shortage of fossil energy and the higher and higher prices have greatly increased the attention of the whole society to solar energy, wind energy and fuel cells as new clean energy sources. Distributed power generation technology using these energy sources has become an important part of the global energy sustainable development strategy . Since 2008, the prices of wind turbines and photovoltaic power generation components have continued to decline, which has gradually increased the cost of power converters in the entire new energy power generation system. The main circuit structure of the inverter and the provision of stable AC and DC power supplies are prerequisites for the promotion of new energy power generation systems. ...
Claims
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IPC IPC(8): H02M3/335
CPCH02M3/3353H02M3/33553H02M3/33576H02M5/225H02M1/0085
Inventor 吴云亚阚加荣朱晓琴姚志垒顾春雷胡国文陈荣
Owner JIANGSU HUASHENG ELECTRICAL CO LTD