同步發電機失磁保護研究

Study on lost of field protection of synchronous generators

鍾隆翔(Lung-Cheung Chung)

指導教授 ： 陳士麟

中原大學/工學院/電機工程研究所/碩士(2013年)

https://doi.org/10.6840/cycu201300076

摘要

同步發電機為電力系統的主要發電機組，在發電機故障中大部分是為激磁系統故障，失磁電驛遂成為同步發電機的一項重要保護機制。
本論文第一部分簡介激磁系統IEEE type1之架構並且說明發電機激磁系統與失磁電驛保護圓的工作原理，並從「IEEE Guide for AC Generator Protection」亦即IEEE C37.102之規範介紹兩種保護圓之方法。
本論文第二部份運用RTDS套裝軟體模擬6種實驗情境: (1)同步發電機與激磁系統穩定運轉、(2)激磁系統誤設定(係指激磁系統內放大器之增益誤設定為偏低值與比壓器時間常數延長)、(3)放大器增益逐步降低與阻抗軌跡對應、(4)激磁系統故障(係指激磁線圈開路)、(5)電力搖擺軌跡進入至失磁電驛的Zone 2保護圓內、(6)在激磁系統誤設定情況下電力系統發生電力搖擺，並分析模擬結果。本論文所建立的模擬平台可模擬發電機的視在功率、無效功率、內電勢、端電壓以及阻抗軌跡之變化情形。由於RTDS具有即時模擬的功能，未來可用此平台線上測試發電機的智慧型電子裝置。
關鍵字：發電機失磁、失磁電驛、保護圓

關鍵字

失磁電驛 ； 發電機失磁 ； 保護圓

並列摘要

Synchronous generator is the main generator in an electric power system. In most incidents of generator failure, the malfunction of excitation system is the main cause, and thus loss of field relay is becoming a major protection mechanism for synchronous generators.
The first part of this thesis illustrates the configuration of excitation system and the operating mechanism of loss of field relay, and introduces two kinds of protection circle schemes, both being based on the same standard：“IEEE Guide for AC Generator Protection”,namely, IEEE C37.102.
In the second part of this thesis ,the author employs RTDS(Real Time Digital Simulator) software package to simulate six cases : (1) synchronous generator and excitation system being under normal operation. (2)mis-setting of excitation system parameters(which refers to the lower setting of amplifier gain and the higher setting of time constant of potential transformer )、(3) step-by-step simulation of lower setting of amplifier gain and its corresponding impedance trajectory、(4)excitation system fault (which refers to the open circuit of field winding)、(5)power swing trajectory into the Zone 2 of protection circle、(6)mis-setting excitation system parameters under which the system encounters power swing. A loss of field simulation platform in then set up, which can simulate of generator complex power、reactive power、terminal voltage、internal voltage and system impedance,under loss of excitation. As RTDS has the real-time simulation capability, the simulation platform can be employed, in the future, to test the hardware in the loop ,such as the IED(Intelligent Electronic Device)of generators .
Keywords: Generator Loss-of-Field, Loss-of-Field Relay, Protection Circle Diagram

並列關鍵字

Generator Loss-of-Field ； Loss-of-Field Relay ； Protection Circle Diagram

參考文獻

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