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A control method of a non-isolated integrated step-up dc/ac converter

A control method and converter technology, applied in the direction of converting AC power input to DC power output, output power conversion device, electrical components, etc., can solve the problem of low boost ratio, achieve high boost capability, and reduce the number of components , The effect of high power conversion efficiency

Active Publication Date: 2022-03-29
合肥名龙电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of low boost ratio in the boost inverter in the prior art, the present invention provides a non-isolated integrated boost DC / AC converter

Method used

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  • A control method of a non-isolated integrated step-up dc/ac converter
  • A control method of a non-isolated integrated step-up dc/ac converter
  • A control method of a non-isolated integrated step-up dc/ac converter

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Embodiment 1

[0043] like figure 1 As shown, a non-isolated integrated step-up DC / AC converter of this embodiment includes a power switch tube S 1 , S 2 , S 3 and S 4 , diode D, inductor L in and capacitance C 1 ;

[0044] Inductance L in Connect one end to the input power supply U in One end, the inductance L in The other end is connected to the anode of diode D;

[0045] The cathode of the diode D is connected to the power switch tube S respectively 1 and S 3 Terminal 1, capacitor C 1 One end of the capacitor C 1 The other ends are connected to the power switch tube S 2 and S 4 terminal 2 of

[0046] Input power U in The other end of the power switch tube S 1 Terminal 2, the power switch tube S 2 Terminal 1 of the terminal and one end of the AC side are grounded;

[0047] Power switch tube S 3 Terminal 2 and power switch tube S 4 Terminal 1 is connected to the other end of the AC side;

[0048] Power switch tube S 3 terminal 2 and the power switch S 4 Terminal 1 of...

Embodiment 2

[0053] like figure 1 As shown, a non-isolated integrated step-up DC / AC converter of this embodiment, on the basis of Embodiment 1, the DC side is a DC power supply U in , in the actual application scenario is the output voltage of the photovoltaic panel, and the AC side also includes a filter, the filter is LC type, including a filter inductor Lo and a filter capacitor Co, one end of the filter inductor Lo is connected to node A, and the filter The other end of the inductor Lo and one end of the filter capacitor Co and the grid or load R O One end is connected, the other end of the filter capacitor Co is connected to the grid or load R O The other end is connected to Node B. Filter pair voltage U AB Perform filtering to remove harmonic interference, which can be selected according to the actual application scenario, and can be an LC filter (such as figure 1 As shown), LCL filter, etc., the output of the filter can be connected to the grid or load, and the load characterist...

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Abstract

The invention discloses a non-isolated integrated step-up DC / AC converter and a control method thereof, belonging to the technical field of power electronic converters. The present invention includes a power switch tube S 1 , S 2 , S 3 and S 4 , diode D, inductor L in and capacitance C 1 ; One end of the DC side of one of the converters is connected to the inductance L in connected at one end, the inductance L in The other end of the diode is connected to the anode of the diode D, and the cathode of the diode D is respectively connected to the power switch tube S 1 and S 3 terminal 1, capacitor C 1 One end of the capacitor C 1 The other ends are connected to the power switch tube S 2 and S 4 Terminal 2; the other end of the DC side, the power switch tube S 1 Terminal 2, power switch tube S 2 Terminal 1 and one end of the AC side are grounded; the power switch tube S 3 Terminal 2 and power switch tube S 4 Terminal 1 is connected to the other end of the AC side. Aiming at the problem of leakage current in the traditional boost inverter, the invention has high integration and small volume, and can effectively solve the problem of leakage current.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a non-isolated integrated step-up DC / AC converter and a control method thereof. Background technique [0002] In the current context of increasingly tense global energy supply, clean, environmentally friendly, and noiseless solar photovoltaic power generation has received widespread attention from countries all over the world. Among them, the inverter is the key interface device in the photovoltaic power generation system. At present, the transformerless non-isolated photovoltaic power generation system has become a research hotspot among scholars due to its small size, light weight, low cost and easy installation. However, the traditional non-isolated inverter lacks the electrical isolation of the transformer. Due to the existence of the parasitic capacitance of the photovoltaic cell to the ground, leakage current is easily generated in the photovoltaic powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/12H02M1/088H02M7/483H02S40/32
CPCH02M1/12H02M1/088H02M7/483H02S40/32Y02E10/50
Inventor 胡雪峰程赫龙子康林鑫
Owner 合肥名龙电子科技有限公司
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