Inverter and method for converting dc power from a generator to grid compatible ac power

Abstract

The invention describes an inverter (10) for converting the DC power of a generator (11) into grid-compatible AC power, in particular as part of a generating composite grid (140), the inverter comprising scanning unit (14), the scanning unit is used to track at least a part of the characteristic curve (20) of the generator (11) to determine the MPP power value (P MPP ). During step-down to step-down power (P red ), only when the enable signal (15) is loaded on the inverter (10), the inverter (10) is providing the reduced power (P red ) deviating from the first power characteristic (24', 25', 108) triggers the tracking of the characteristic curve (20). The start and end of the trace is indicated by outputting a start signal (16) or an end signal. In case a start signal (116) is received, e.g. has a sign and the downregulation power (P red ), the sign is related to the second power characteristic (118) and the downregulated power (P red ) has the opposite sign of the deviation. In a combined power generation grid (140), at least two inverters are connected to each other for exchanging said enable signal (15), said start signal (16) and said end signal. The invention also describes a method for operating the inverter (10).

Description

technical field [0001] The present invention relates to an inverter for converting DC power of a generator into grid-compatible AC power, a power generation composite grid with a plurality of inverters, and a method for converting DC power of a generator into grid-compatible AC power. grid-compatible AC power method. Background technique [0002] Since generating devices for renewable energies contribute to a high degree of energy generation in the public grid, there is a desire to delimit the range of energy feed-in by these devices, for example in the event of slight power drops due to connected loads To stabilize the grid from time to time, or to maintain a power reserve that can be called for in the short term. One possibility for limiting the feed-in, ie for regulation down, consists in controlling the device such that it feeds only a preset percentage of the power available at the optimum operating point MPP (Maximum Power Point) to the connection Another possibility...

AI Technical Summary

Problems solved by technology

This solution requires a high communication effort between the participating inverters and a common controller

Furthermore, it is not always possible to continuously operate the equipment of the composite grid in the MPP, especially when downsizing to very small downsizing

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