臺灣博碩士論文加值系統

在公元2000年台電尖峰系統內，存在有兩個主要的問題，一個是北部與中部之超高壓
輸電線路的電力潮流有分配不均的現象，另一個是在某些超高壓線路跳脫的情形下，峨眉
變電所的電壓會有過低的現象產生。串聯補償的加入雖可改善電力潮流分配不均的問題，
但也會帶來次同步共振(SSR)模式阻尼減少的問題。 本論文對於各種不同的補償比及
補償地點之串聯電容器加入台電系統後，對系統次同步共振模式的阻尼，會有多少的影響
進行評估。另外在峨眉變電所電壓穩定度問題方面，利用固定電容與靜態虛功補償器(SVC
)所組成的並聯補償器，來進行改善。研究結果顯示，並聯補償器除了可使峨眉變電所的
動態響應變好外，也可改善因為串聯補償的加入，而導致次同步共振阻尼變差的現象。

For the power system of Taiwan Power Company (TPC) during the peak loadper
iod in 2000 AD, two problems have been observed. One is the phenomenon ofunequ
al sharing of power flows over the EHV transmission lines connectingthe northe
rn and central areas; the other is the bus voltage of OMEIsubstation being too
low in some outage cases. Although series compensationmay be applied to contr
ol the power flows over transmission lines, the dampingof subsynchronous reson
ance (SSR) may be adversely affected. The effect of series capacitors with
various compensation ratios andinstallation locations on the damping of SSR mo
des in Taiwan power system is evaluated in this thesis. It is found that by co
mbining a fixed capacitor (FC)and a static VAR compensator (SVC) into a shunt
compensator, we can not only improve the dynamic response of OMEI bus voltage
but also increase the dampingof SSR modes over series capacitor compensated sy
stem.