Identification of static load characteristics based on measurements in medium-voltage distribution network

The authors deal with static load (SL) characteristics (P-V and Q-V characteristics) of a medium-voltage distribution network derived from field measurements. The experiments have been performed by changing the tap position of an on-load tap-changing transformer in different seasons, different week days and day periods. P-V and Q-V load characteristics are divided into two classes, transient and steady-state characteristics. The differences between them are discussed and quantified. Both classes are mathematically described by polynomial, linear and exponential SL models. Model parameters are obtained by curve fitting using a least square method. The adequacy of developed load models is critically assessed and discussed. All the static characteristics are grouped according to seasons and day periods and are mutually compared. Finally, the parameters of the SL models for residential load without electrical heating are suggested for different seasons.

[1]  Hsiao-Dong Chiang,et al.  Dynamic load models in power systems using the measurement approach , 1993 .

[2]  Oliver Nelles.  Dynamic Neural and Fuzzy Models , 2001 .

[3]  D. Hill,et al.  Modelling and identification of nonlinear dynamic loads in power systems , 1994 .

[4]  C. W. Taylor,et al.  Standard load models for power flow and dynamic performance simulation , 1995 .

[5]  Jovica V. Milanovic.  On unreliability of exponential load models , 1999 .

[6]  C. W. Taylor.  Power System Voltage Stability , 1993 .

[7]  P. Kundur,et al.  Power system stability and control , 1994 .

[8]  Wilsun Xu,et al.  Voltage stability analysis using generic dynamic load models , 1994 .

[9]  Yung-Tien Chen,et al.  Comparison of simulated power system dynamics applying various load models with actual recorded data , 1994 .

[10]  F. Nozari,et al.  Load modeling for power flow and transient stability computer studies , 1988 .

[11]  C.A. Canizares,et al.  On the parameter estimation and modeling of aggregate power system loads , 2004, IEEE Transactions on Power Systems.

[12]  S. Ihara,et al.  Load Behavior Observed in LILCO and RG&E Systems , 1984, IEEE Power Engineering Review.

[13]  O. Nelles.  Nonlinear System Identification: From Classical Approaches to Neural Networks and Fuzzy Models , 2000 .

[14]  L. M. Hajagos,et al.  Laboratory measurements and models of modern loads and their effect on voltage stability studies , 1998 .

[15]  Hsiao-Dong Chiang,et al.  Development of a dynamic ZIP-motor load model from on-line field measurements , 1997 .

[16]  F. Lange,et al.  A New Aggregation Method for Determining Composite Load Characteristics , 1982, IEEE Transactions on Power Apparatus and Systems.

[17]  R. Fischl,et al.  Dynamic reactive load model , 1998 .

[18]  Yahia Baghzouz,et al.  Determination of static load models from LTC and capacitor switching tests , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[19]  David J. Hill,et al.  Nonlinear dynamic load models with recovery for voltage stability studies , 1993 .

[20]  S. Ihara,et al.  Load Representation in Power System Stability Studies , 1982, IEEE Transactions on Power Apparatus and Systems.

[21]  Lidija M. Korunovic,et al.  Load modeling in distribution networks , 2002 .