High-efficiency multisource photovoltaic inverter
A photovoltaic inverter, high-efficiency technology, applied in the direction of instruments, DC power input conversion to DC power output, adjustment of electrical variables, etc., can solve problems such as photovoltaic system losses, achieve efficiency improvement, high efficiency, and avoid switching losses Effect
Inactive Publication Date: 2013-02-13
SUZHOU LVYIN ENERGY TECH
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Each stage typically results in a loss of half of the PV system for that stage
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[0021] Such as Figure 1~3 The shown high-efficiency multi-source photovoltaic inverter includes an inverter box 1, and the inverter box 1 is provided with a box cover, which is different in that: the inverter used in the present invention A converter box 1 is provided with a conversion photovoltaic array assembly 2 . Specifically, the processing terminals of the converted photovoltaic array assembly 2 are respectively connected to a step-down assembly 3 and a boost assembly 4 . At the same time, a high-frequency step-down switch is provided at the input end of the step-down component 3 as a component as a converter 5 . Moreover, an inverter conversion module 6 is connected to the connecting terminal of the step-down component 3 and the booster component 4 , and a power grid connection terminal 7 is arranged on the connection end of the inverter conversion module 6 .
[0022] Such as figure 1 As shown in a preferred embodiment of the present invention, in order to effective...
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The invention relates to a high-efficiency multisource photovoltaic inverter, which comprises an inverter box body, wherein a box cover is arranged on the inverter box body. The high-efficiency multisource photovoltaic inverter is characterized in that a conversion photovoltaic array assembly is arranged in the inverter box body, a processing terminal of the conversion photovoltaic array assembly is respectively connected with a voltage reduction assembly and a voltage boosting assembly; a converter is arranged at the input end of the voltage reduction assembly; a connection terminal of the voltage reduction assembly and the voltage boosting assembly is connected with an inversion conversion module; and a power grid connecting terminal is arranged on the connecting end of the inversion conversion module. The high-efficiency multisource photovoltaic inverter can be used for various photovoltaic arrays and alternative energy resources and avoids switching loss; and if the voltage of the photovoltaic arrays is higher than that of a power grid, a circuit works independently like a voltage reduction converter. If the voltage of the photovoltaic arrays is lower than the voltage of the power grid, the voltage boosting circuit works in synchronization with the voltage reduction converter, and therefore the voltage of the voltage reduction converter is always higher than that of the power grid. Through special selection on the conversers, the high-efficiency multisource photovoltaic inverter has the capability of further improving the efficiency.
Description
technical field [0001] The invention relates to an inverter, in particular to a high-efficiency multi-source photovoltaic inverter. Background technique [0002] Photovoltaic (PV) cells typically generate direct current, the degree of current (DC) depending on solar radiation and the degree of direct current that is temperature dependent. Inverters convert DC power into AC power when alternating current (AC) power is required. A typical photovoltaic inverter uses two stages of energy processing, the first stage is to provide a constant DC voltage, and the second stage converts its constant DC voltage to AC voltage. Usually the first stage includes a boost converter, and the second stage includes a single-phase or three-phase inverter system. The conversion rate of the two-stage inverter is an important parameter that affects the performance of the photovoltaic system. Each stage typically results in the loss of half of the PV system for that stage. Single-phase photovolta...
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IPC IPC(8): H02M7/48H02M3/08H02M3/155
Inventor 冼博特罗布·瑞安
Owner SUZHOU LVYIN ENERGY TECH