Single-phase cascade H-bridge grid-connected inverter control method under weak grid
A control method and inverter technology, which are applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve problems such as unfavorable project implementation, inability of inverters to operate stably, less involving cascaded systems, etc., and achieve expansion and stability. The effect of the running range
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[0054] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further clearly and completely described below in conjunction with the accompanying drawings and embodiments.
[0055] figure 1 It is the topological structure of the single-phase cascaded H-bridge photovoltaic grid-connected inverter according to the embodiment of the present invention. As shown in the figure, the single-phase cascaded H-bridge photovoltaic grid-connected inverter consists of N H Bridge unit, filter inductor L S and filter capacitor C f composition. Specifically, the DC sides of N H-bridge units are sequentially connected to N photovoltaic panels PV1, PV2...PVN, and the working conditions of the photovoltaic panels are at a rated temperature of 25°C and a rated light intensity of 1000W / m 2 The maximum power point voltage is 30.40V, each photovoltaic panel is connected to each H-bridge unit through a 14.1mF capacitor, and ...
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