TA的每日心情 | 愤怒
2020-12-8 11:59 |
|---|
签到天数: 105 天 连续签到: 1 天 [LV.6]常住居民II 累计签到：223 天
连续签到：1 天
|
发表于 2012-6-2 10:09:14
|
显示全部楼层
On-Line Tap Changer* l/ G! o1 F1 Y) c
All transformer components are equipped with an on-line tap changer. When the tap changer is enabled, a diagonal line will appear on the component graphic, labelled Tap.
' e _' ?7 l; Y0 K* [A change in tap setting is modeled as a change in the turns-ratio of the transformer. The per-unit leakage reactance and magnetizing currents, specified for 100% tap, are used to calculate admittances for the new voltage rating, corresponding to the tap setting.
$ P E/ a" p! Q. G1 OEXAMPLE:
% t; [' ]" K7 U( E* RLet us assume for simplicity, that a transformer is configured as Y-Y, with winding voltages rated at 10 kV primary and 100 kV secondary, and a tap changer is placed on the primary winding. The turns-ratio for this transformer is of course 1:10. 6 z+ r0 y- X% L
An on-line tap input of 1.0 corresponds to a 100% tap (i.e. no tap adjustment). If the tap input value is adjusted to say 1.05, then the turns-ratio would become 1.05:10 or 1:9.52381.+ b7 P, y) O# J( Z7 p) J
It is possible to have a continuous change of tap, but this would require a re-ordering of the network solution every time step. It is more practical to change tap settings in steps, either through manual adjustment, using a slider or rotary switch, or from a controller with appropriate delays and steps built in. |
|
赣公网安备36040302000210号 )|网站地图
狗仔卡
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡