Inverter and control method and device of same
An inverter and inverter bridge technology, applied in the field of photovoltaic power generation, can solve the problems of poor output power quality, unstable output voltage, low boost capability, etc., so as to reduce voltage fluctuation, reduce voltage stress, and improve boost effect of ability
Inactive Publication Date: 2019-07-09
BEIJING ETECHWIN ELECTRIC
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Problems solved by technology
[0004] However, the existing Z-source inverter has low boosting capacity, and when the input voltage fluctuates, the output voltage is unstable, poor in stability, and poor in output power quality.
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[0074] The characteristics and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only configured to explain the present invention, not to limit the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.
[0075] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and ...
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The embodiment of the invention discloses an inverter and a control method and device of the same. The inverter comprises a first transformation unit, a second transformation unit, a first capacitanceunit, a second capacitance unit and three inversion bridge units, wherein the three inversion bridge units are connected in parallel, a first end of the first transformation unit is connected with anegative electrode of a power supply, a second end of the first transformation unit is connected with one end of the first capacitance unit and a first end of each inversion bridge unit in the three inversion bridge units connected in parallel, a third end of the first transformation unit is connected with one end of the second capacitance unit, a first end of the second transformation unit is connected with a positive electrode of the power supply, a second end of the second transformation unit is connected with the other end of the second capacitance unit and a second end of each inversion bridge unit, a third end of the second transformation unit is connected with the other end of the first capacitance unit, and a third end of each inversion bridge unit is connected with one phase in three phase alternating currents. By the inverter, the boost capability of the inverter and the output electric energy quality can be improved.
Description
technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to an inverter, a control method and a device for the inverter. Background technique [0002] An inverter is an electronic device that converts DC power into AC power. [0003] In the photovoltaic power generation system, the output voltage of the photovoltaic array needs to be converted from direct current to alternating current through an inverter and connected to the grid for users to use. The traditional voltage source inverter needs to go through a step-up transformation first, so that the voltage of the DC bus is higher than the rated value before inverting. In view of this limitation, a Z-source inverter is proposed, which simplifies the topological structure of the photovoltaic power generation system. The impedance network composed of inductors, capacitors, and diodes allows the inverter circuit to be in a through state, without the concerns of tradit...
Claims
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Login to View More IPC IPC(8): H02M7/5387H02J3/38
CPCH02J3/385H02M7/53871Y02E10/56
Inventor 王世龙
Owner BEIJING ETECHWIN ELECTRIC