2015年5月25日星期一

Transformerless inverter use advantages of BIPV

Conventional inverter BIPV often limit the use of the photovoltaic inverter system design, for example, 1 MW system, using two 500KW inverter system need to install the inverter on the ground, for this reason traditional inverters relatively large size and weight, is not suitable for installation in roofs. If transformerless inverters, its small size and because of its light weight, can be directly connected with the solar panels on the roof.
A plurality of inverters may be connected in parallel without the use of a transformer, and power can be used directly, in order to achieve stable performance. Transformerless 300w solar inverter technology uses a much larger power optimizer (Line Reactor) and smaller triangles filter capacitor. These smaller triangles by means of a filter capacitor series resistors are buffered, and thus improve the stability of the control system, and to reduce the interaction between the parallel 3000w solar inverter . A design with a single engine 500 kilowatts inverter also reduces the number of parts, thereby improving overall system reliability.
Using multiple inverters do conventional photovoltaic systems, each must have a separate isolation transformer to match, resulting in reduced efficiency because there is energy loss isolation transformer. Without transformer type no isolation transformer, thus obtaining additional power from photovoltaic modules to supply energy to the load.
Without a transformer, DC AC power inverters smaller size, lighter weight for the power integrators to provide greater freedom in installation and overall system design. Because of weight restrictions and the need of reinforcement measures, five-storey building in the roof of the building to install a conventional inverter from a cost point might be prohibitive, but the designer was able to make a transformerless inverter is installed in commercial buildings on the roof (not installed in the basement), so that it is directly connected with the fifth floor of the mounting plate. This design not only can remove up to five floors of expensive DC wiring, but also shorten the length of the AC cord and reduce associated costs.

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