非同期発電機の交流接続方法及びそれに使用する電気的接続

Japanese Patent JP3897365

B2

The invention relates to a procedure of connecting a polyphased asynchronous generator on a polyphased alternating voltage network. The connecting is carried out by means of an adjustable, electronic connecting based on thyristors or similar variable (adjustable) connecting items, the connecting degree of which is varied during a controlled connecting course, which is controlled in consideration of the wish of a "soft" connecting on the network and a limitation of the maximum amperage during the connecting course. During the whole connecting course a continuous determination of the generator phase angle ϕ is carried out, and on basis of this determination a continuous adjustment of thyristors - the aperture angle is carried out, thus the aimed, successive load connection of the generator on the network (soft-connecting) is obtained. Furthermore the procedure includes a new method to determine the generator phase angle ϕ by registering the time of zero circulation on the phase voltage, and at the same time detection of the respective thyristor voltage-zero circulation point at a measuring method based on measuring of the thyristor voltage. The novelty of the invention consists in adjusting the ignition point of the thyristors successively to the phase angle ϕ, thus the connecting degree resulted to the thyristors is increased in an controlled speed regardless the variations registered in the phase angle during the connecting course. I.e. in the principle the thyristor aperture angle is reduced, when ϕ increases and so on.

Henriksen, Kirsten

JP50522699A

March 22, 2007

June 25, 1998

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Mitter Technic A/S

H02J3/40; H02M5/27; H02P9/00

JP1194824A
JP5199800A
JP8214470A
JP6505618A

US4388585
US4656413
WO1995006975A1
WO1997004521A1

Sadayuki Hosoi
Ishiwatari Eibo
Mitsuo Chonan

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