Inverter, in particular as part of a power generation network, and method

Abstract

An inverter (10) is described for converting DC output from a generator (11) into grid-compatible AC output, in particular as part of a power generation network (140), said inverter comprising a scanning unit (14) for delineating at least a part of a characteristic curve (20) of the generator (11) for determining an MPP output value (PMPP). The inverter (10) only triggers a delineation of the characteristic curve (20) upon provision of a first output profile (24', 25', 108) that deviates from the reduced output (Pred) if, in the case of a reduction to a reduced output (Pred), a release signal (15) is applied at the inverter (10). A start and an end of the delineation are indicated by the output of a start signal (16) and an end signal respectively. Upon receiving a start signal (116), for example from a further inverter of the power generation network, a second output profile (118) is provided as an AC power, wherein the first output profile (24', 25', 108) has a deviation from the reduced output (Pred) with a sign that is opposite to a sign of a deviation of the second output profile (118) from the reduced output (Pred). At least two inverters are connected to each other in a power generation network (140) for exchanging the release signal (15), the start signal (16) and the end signal. A corresponding method for operating the inverter (10) is likewise described.

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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