Multi-generator set multi-pulse rectifying method

A generator set and generator set technology, which is applied in the direction of irreversible AC power input conversion to DC power output, etc., can solve the problems of direct drive system volume, weight and cost, large rectification output pulsation, and large filter components. Achieve stable DC voltage, reduce circuit loss, and reduce capacity

Inactive Publication Date: 2010-11-10
ZHEJIANG UNIV
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Problems solved by technology

However, the direct drive system requires a huge low-speed synchronous motor, and due to the low operating frequency and the large pulsation of the rectified output, a large filter element is required, which has caused problems in the size, weight, and cost of the direct drive system.

Method used

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Embodiment Construction

[0014] refer to figure 1 , in this example, there are 4 generators G11, G12, G21, G22 that have the same structure and capacity, and are operated synchronously under mechanical structure constraints (such as using a rotating gear to mesh with the gear of the generator). Divide the 4 generators into 2 groups on average Q1, Q2, (ie M=2), each generator set includes 2 generators (ie N=2).

[0015] Let each generator be a six-phase generator, taking the first generator G11 as an example, as figure 1 shown. The total number of internal windings is F=6, and the 6 windings are evenly divided into two groups S1 and S2 (ie J=2), each group of windings is a rectifier unit, and each group has 3-phase windings (ie K=3).

[0016] The windings in the generator meet the following electrical angle requirements: the electrical angle between the windings of the same rectifier unit is α=360° / K=120°, and the electrical angle between the windings T11, T12, and T13 of the first rectifier unit S1 ...

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Abstract

The invention discloses a multi-generator set multi-pulse rectifying method, a plurality of generators having the same structure and volume and synchronously operating under the restriction of a mechanical structure are averagely divided into M sets, each generator set comprises N generators, the output voltages of the generators in different phase positions are mutually superimposed at the direct current sides of the generator sets after rectification by reasonably designing the electrical angles among generator windings, the generators in the same set and the generator sets, the voltage peak pulse number is increased, and the amplitude is decreased, so that the steady direct current output voltage can be obtained, the current grade and the circuit loss are reduced, and the capacity of a filter capacitor is reduced.

Description

technical field [0001] The invention relates to a rectification method for distributed power generation, in particular to a multi-pulse rectification method for multi-generator sets suitable for wind power generation. Background technique [0002] Wind power generation is a new energy generation method that works in a low-speed range. It adopts a system structure of low-speed synchronous motor or permanent magnet motor plus rectification and inverter, that is, a direct drive system, which can achieve high efficiency and easy control of power supply to the power system. Series advantages. However, the direct drive system requires a huge low-speed synchronous motor, and due to the low operating frequency and the large pulsation of the rectified output, a large filter element is required, all of which have caused problems in the size, weight, and cost of the direct drive system. The semi-direct drive system uses a single-stage gear to accelerate the rotation speed of the motor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/12
Inventor 吕征宇王仕韬潘式正姚文熙郑家龙
Owner ZHEJIANG UNIV
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