| 翻訳と辞書 |
| low voltage ride through ： ウィキペディア英語版 |
low voltage ride through
In electricity supply and generation, low voltage ride through (LVRT), or fault ride through (FRT), is a capability of electrical devices, especially wind generators, to be able to operate through periods of lower grid voltage. Similar requirements for critical loads such as computer systems and industrial processes are often handled through the use of an uninterruptible power supply (UPS) or capacitor bank to supply make-up power during these events.
Many generator designs use electric current flowing through windings to produce the magnetic field on which the motor or generator operates. This is in contrast to designs that use permanent magnets to generate this field instead. Such devices may have a minimum working voltage, below which the device does not work correctly, or does so at greatly reduced efficiency. Some will cut themselves out of the circuit when these conditions apply. This effect is more severe in doubly-fed Induction generators (DFIG), which have two sets of powered magnetic windings, than in squirrel-cage Induction generators which have only one.
==Risk of chain reaction==
In a grid containing many distributed generators subject to low-voltage disconnect, it is possible to create a chain reaction that takes other generators offline as well. This can occur in the event of a voltage dip that causes one of the generators to disconnect from the grid. As voltage dips are often caused by too little generation for the load, removing generation can cause the voltage to drop further. This may bring the voltage low enough to cause another generator to trip out, lower it further, and causing a cascading failure.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「low voltage ride through」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|