Shaft-driven generator system

A technology for shaft generators and generators, which is applied in the direction of generator control circuits, engines using propulsion device combinations, electrical components, etc., and can solve problems such as high investment costs and shaft generator systems that have not yet been formed

Active Publication Date: 2013-02-13
SIEMENS AG
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  • Abstract
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Problems solved by technology

However, unforeseen harmonic oscillations can also occur in the frequency converter output voltage, which excite existing grid filters, so that the requirements for grid harmonic limits can only be met at great expense
[0025] For these reasons, so far, especially in medium-voltage applications, there have not been shaft generator systems with a voltage intermediate circuit-converter as static frequency converter that fully meet the requirements in the aforementioned medium-voltage range

Method used

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Embodiment Construction

[0037] Ship drive system 2 known from DE 10 2006 020 144 B4 according to figure 1 There is a main engine 4 designed as a slow-running two-stroke diesel engine, which via a propeller shaft 6 has a ship propeller 8 for driving the ship. In order to generate power for the ship's power grid, shown by the ship's power grid busbar 10 , a plurality of generators 12 are provided, which are each driven by auxiliary machines 14 which run faster than the main machine. The auxiliary machine 14 is usually a fast-running four-stroke diesel engine. Typically, the generator 12 and the diesel engine 14 are combined into a diesel generator set 16 , respectively.

[0038] The shaft generator / engine 18 is mechanically coupled to the propeller shaft 6 and is electrically connected via a frequency converter 20 and a transformer 22 to the ship's power grid busbar 10 of the ship's power grid. The current intermediate circuit frequency converter is designed as a frequency converter 20 which has con...

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Abstract

The invention relates to a shaft-driven generator system having a shaft-driven generator (18). According to the invention, a voltage source inverter (42) having a network-side inductance is provided, wherein said voltage source inverter (42) has a converter (44, 46) on the generator side and on the network side, which are linked to each other on the direct-voltage side, and wherein the converter (46) on the network side has at least two phase modules, which each have an upper and a lower valve branch (P1, N1, P2, N2, P3, N3), which each have a plurality of two-pole sub-systems (SM1,..., SMn) connected electrically in series, which sub-systems each have a unipolar storage capacitor (CSM), to which a series circuit of two semiconductor switches (S1, S2) that can be switched off is connected electrically in parallel, each semiconductor switch having a diode (D1, D2); connected antiparallel. Thus, a shaft-driven generator system is obtained that has a voltage source inverter (42) as a static frequency converter. By means of the voltage source inverter, the required effects on the network can be complied with and transient operating states controlled.

Description

technical field [0001] The invention relates to a shaft generator system with a shaft generator. Background technique [0002] A kind of Shaft generator system. A shaft generator system is a system commonly used on ships to generate electrical energy inexpensively. As part of a ship's power station, a shaft generator system has the following components: [0003] - shaft generators operating at variable speeds for generating electrical power at varying frequencies, [0004] - Static frequency converters designed as intermediate circuit-frequency converters for frequency- and voltage-dependent disconnection of the shaft generator and the ship's grid, consisting of a rectifier on the generator side, an inverter on the grid side and a DC current- or DC The voltage intermediate circuit constitutes, [0005] - current intermediate circuit - intermediate circuit chokes required in frequency converters to smooth the intermediate circuit current, [0006] - voltage intermediate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458H02M7/483
CPCB63H21/20H02J4/00H02M7/483B63J3/02Y02T70/5281H02P9/007H02M5/458H02M2007/4835H02J2310/42Y02T70/50H02M7/4835H02P9/04H02P9/14H02P2101/35
Inventor 克里斯托夫·布鲁诺特马克·希勒赖纳·佐默
Owner SIEMENS AG
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