电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2014年
23期
40-45
,共6页
端口供给能量%经验模态分解%强迫振荡%弱阻尼振荡%振荡类型识别
耑口供給能量%經驗模態分解%彊迫振盪%弱阻尼振盪%振盪類型識彆
단구공급능량%경험모태분해%강박진탕%약조니진탕%진탕류형식별
energy supply on port%empirical mode decomposition (EMD)%forced oscillation%weak damp oscillations%oscillation type identification
基于端口供给能量分解，提出了一种新的电力系统振荡类型识别方法。对端口供给能量进行成分分解，发现弱阻尼振荡和强迫振荡下端口供给能量趋势分量分别按指数和线性规律变化。采用经验模式分解算法识别出主导振荡模式，计算端口供给能量，利用经验模式分解算法提取端口供给能量趋势分量。对变化幅度明显的端口供给能量趋势分量进行线性和指数拟合并得到拟合误差指标，对拟合数据和原始数据进行相关性计算得到相关度指标。然后利用误差指标和相关度指标判别该趋势分量的变化规律，进而利用变化规律的不同识别振荡类型。最后通过 IEEE 39节点系统的仿真分析和实际电厂的实例分析证明了该识别方法的有效性。
基于耑口供給能量分解，提齣瞭一種新的電力繫統振盪類型識彆方法。對耑口供給能量進行成分分解，髮現弱阻尼振盪和彊迫振盪下耑口供給能量趨勢分量分彆按指數和線性規律變化。採用經驗模式分解算法識彆齣主導振盪模式，計算耑口供給能量，利用經驗模式分解算法提取耑口供給能量趨勢分量。對變化幅度明顯的耑口供給能量趨勢分量進行線性和指數擬閤併得到擬閤誤差指標，對擬閤數據和原始數據進行相關性計算得到相關度指標。然後利用誤差指標和相關度指標判彆該趨勢分量的變化規律，進而利用變化規律的不同識彆振盪類型。最後通過 IEEE 39節點繫統的倣真分析和實際電廠的實例分析證明瞭該識彆方法的有效性。
기우단구공급능량분해，제출료일충신적전력계통진탕류형식별방법。대단구공급능량진행성분분해，발현약조니진탕화강박진탕하단구공급능량추세분량분별안지수화선성규률변화。채용경험모식분해산법식별출주도진탕모식，계산단구공급능량，이용경험모식분해산법제취단구공급능량추세분량。대변화폭도명현적단구공급능량추세분량진행선성화지수의합병득도의합오차지표，대의합수거화원시수거진행상관성계산득도상관도지표。연후이용오차지표화상관도지표판별해추세분량적변화규률，진이이용변화규률적불동식별진탕류형。최후통과 IEEE 39절점계통적방진분석화실제전엄적실례분석증명료해식별방법적유효성。
A new method of identifying the power system oscillation property using decomposition of energy supply on the port (ESP) is proposed.Component decomposition of ESP is conducted and found to show that the trend component of ESP changes exponentially under weak damp oscillation while linearly under forced oscillation,respectively.ESP is calculated using the component of dominant mode in electrical variables,which are acquired by empirical mode decomposition (EMD).The trend components of ESPs are also obtained by EMD with the obvious trend component of ESPs fitted by exponential and linear curves,respectively.The correlation coefficients between real trend component and fitting trend component are calculated under two fitting types.The change rule of the trend component is determined by fitting error indices and the correlation coefficient.The oscillation type is identified according to the identified change rule.Finally,the simulation analysis of an IEEE 3 9-bus system and the instance analysis of a real power plant has proved the validity of the proposed method. This work is supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.51321005)and National Natural Science Foundation of China(No.51177079).
