CAJ | 학술논문

该文针对电力系统稳定器(power system stabilizer，PSS)理论与工程之间差异的关键细节进行说明和探讨。首先简要阐述了力矩分解法分析低频振荡的基本原理，介绍了与PSS相关的关键概念及其区别。然后通过分析和仿真指出，PSS参数整定是基于发电机在功角处开环时的励磁系统相频特性，即理论值，而实测励磁系统相频特性是功角闭环时得到的。两者在系统自然振荡频率附近狭窄的频段内有很大差别，但在其余频段差别很小，因此可以通过“人工平滑”的方式由实测值得到理论值。并进一步论证了 PSS 参数现场整定方法的合理性。最后提出，由于发电机负荷变化时，励磁系统的理论无补偿相频特性差异很小，工程应用中在发电机负荷较大和较小时均可配置PSS参数。
해문침대전력계통은정기(power system stabilizer，PSS)이론여공정지간차이적관건세절진행설명화탐토。수선간요천술료력구분해법분석저빈진탕적기본원리，개소료여PSS상관적관건개념급기구별。연후통과분석화방진지출，PSS삼수정정시기우발전궤재공각처개배시적려자계통상빈특성，즉이론치，이실측려자계통상빈특성시공각폐배시득도적。량자재계통자연진탕빈솔부근협착적빈단내유흔대차별，단재기여빈단차별흔소，인차가이통과“인공평활”적방식유실측치득도이론치。병진일보론증료 PSS 삼수현장정정방법적합이성。최후제출，유우발전궤부하변화시，려자계통적이론무보상상빈특성차이흔소，공정응용중재발전궤부하교대화교소시균가배치PSS삼수。
The key details of the differences between power system stabilizer (PSS) theory and engineering application was illustrated and discussed. As the theory foundation, the principle of torque decomposing method which is used to analyze the low frequency oscillation was expatiated, and several important conceptions were explained. The analysis and simulation indicates that PSS parameters setting is based on the excitation system frequency characteristic as the generator power angle is open-looped, namely, the theoretical value, while the field engineering excitation system frequency characteristic is obtained as the power angle is looped. There is obvious difference between the two kinds of frequency characteristic in the narrow frequency channel nearing system natural oscillation frequency, but the difference is very small in the other channels. So theoretical frequency characteristic of the excitation system can be gotten after the field engineering value is manual smoothed. At last, a standpoint is extracted that the PSS parameters can be set not only as the generator is in big load but also in small load in the engineering application, because the variation of the theoretical frequency characteristic of the excitation system uncompensated is small when the generator power changes.