Laminated busbar photovoltaic inverter
A photovoltaic inverter, laminated busbar technology, applied in photovoltaic power generation, AC power input into DC power output, output power conversion devices, etc. There are many fixed interfaces and other problems, so as to achieve the effect of reducing cost, high insulation level and few wiring interfaces.
Inactive Publication Date: 2012-03-21
JIANGSU KAIFAN ELECTRICAL APPLIANCES
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Problems solved by technology
[0003] In the traditional two-stage inverter structure layout, the DC / DC boost circuit and the DC / AC inverter circuit are separate circuits, the installation and heat dissipation of the two IGBTs use independent components and heat dissipation devices, and the main busbars are set reasonably. Using too many fastening interfaces increases the stray inductance of the entire system and affects the quality of the inverter
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[0014] Such as figure 1 , figure 2 As shown, the laminated busbar photovoltaic inverter includes a boost circuit IGBT unit 1 for a DC / DC boost circuit, an inverter circuit IGBT unit 2 for a DC / AC inverter circuit, a DC film capacitor 3 and The main busbar 4; the main busbar is a double-layer laminated structure, and the surface of the two-layer main busbar is coated with insulating varnish to insulate each other. As the positive electrode row and the negative electrode row, insulating paper can also be placed between the two layers of the main busbar , to improve the insulation capacity. The boost circuit IGBT unit 1 and the inverter circuit IGBT unit 2 are arranged side by side under the main busbar and installed on the same radiator 5; the DC film capacitor 3 is placed above the main busbar; the boost circuit IGBT unit 1, inverter The transformer circuit IGBT unit 2 and the DC film capacitor 3 are respectively connected to the busbar through their respective interfaces. ...
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The invention relates to a function module of a photovoltaic power generation facility, particularly a laminated busbar photovoltaic inverter used for small and medium-power photovoltaic systems. The laminated busbar photovoltaic inverter comprises a boost circuit IGBT (Insulated-Gate Bipolar Transistor) unit used for a DC / DC boost circuit, inverter circuit IGBT units used for a DC / AC inverter circuit, a DC thin-film capacitor and a main busbar; the main busbar adopts a double-layered laminated structure; the surfaces of the two layers of the main busbar are coated with insulating paint, so that the two layers are insulated from each other and are used as a positive busbar and a negative busbar respectively; the boost circuit IGBT unit and the inverter circuit IGBT units are arranged below the main busbar side by side and are mount on the same radiator; the DC thin-film capacitor is arranged above the main busbar; and the boost circuit IGBT unit, the inverter circuit IGBT units and the DC thin-film capacitor are connected with the busbars via respective interfaces respectively. The laminated busbar photovoltaic inverter provided by the invention has the advantages that connecting wires and interfaces of the main busbar are less, the structure is compact, the mounting is convenient, the insulating level between the positive pole and the negative pole is high, the design of the power unit of a two-stage type photovoltaic grid-connected inverter is simplified, and the cost is reduced.
Description
technical field [0001] The invention relates to a functional module of photovoltaic power generation equipment, in particular to a laminated busbar photovoltaic inverter used in a small and medium power photovoltaic system. Background technique [0002] In small and medium power photovoltaic inverters, the DC bus voltage of photovoltaic modules is low and cannot meet the requirements of IGBT inverters. Therefore, the inverter process needs to adopt a two-stage topology. Before the three-phase AC inverter, the DC / DC step-up The voltage circuit boosts the DC voltage, and then converts the DC / AC into AC with a full-bridge inverter structure. [0003] In the traditional two-stage inverter structure layout, the DC / DC boost circuit and the DC / AC inverter circuit are separate circuits, the installation and heat dissipation of the two IGBTs use independent components and heat dissipation devices, and the main busbars are set reasonably. Using too many fastening interfaces increases...
Claims
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IPC IPC(8): H02M7/00
CPCY02E10/56
Inventor 王敏宋军会丁艳孙华美许跃宏
Owner JIANGSU KAIFAN ELECTRICAL APPLIANCES