Measurement-based Static Load Modeling Using the PMU data Installed on the University Load

Abstract

-Load modeling has a significant influence on power system analysis and control. In recent years, measurement-based load modeling has been widely practiced. In the load modeling algorithm, the model structure is determined and the parameters of the established model are estimated. For parameter estimation, least-squares optimization method is applied. The model parameters are estimated so that the error between the measured values and the predicted values is to be minimized. By introducing sliding window concept, on-line load modeling method can be performed which reflects the dynamic behaviors of loads in real-time. For the purpose of data acquisition, the measurement system including PMU is implemented in university level. In this paper, case studies are performed using real PMU data from Korea Univ. and Seoul National University of Science and Technology. The performances of modeling real and reactive power behaviors using exponential and ZIP load model are evaluated.

A new approach to load modelling for a power electronics‐based load structure

“…Second, the proposed method does not force the same model for both active and reactive power and gives freedom to the selection of active and reactive power models, which means that in the proposed method, active and reactive power could have different models. Yet, in the other methods [16][17][18][19][20][21][22][23][24][25], the chosen models without any reason are the same for both active and reactive power. In addition, this method uses the feature of all models appropriately.…”

“…In other words, imposing the active power model on reactive power makes the load modelling have low accuracy. Now, it is clear that choosing an insufficient structure, prefixing the model, and selecting the same models for both active and reactive power [5,6,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] reduces modelling accuracy, especially when EVs considerably have participated in load structure, as it was argued in section one. And as was claimed, the proposed models and methodology succeeded in enhancing the accuracy of load modelling, especially in the presence of EVs.…”

Measurement-based approach for identification of static load models of electric power systems

“…Экспериментальному определению статиче-ских характеристик нагрузки посвящены работы отечественных и зарубежных ученых [5][6][7][8][9][10][11][12][13][14][15]. Од-нако при решении этой задачи на практике кроме организационных и технических трудностей про-ведения эксперимента приходится сталкиваться и с методическими вопросами, не вполне прорабо-танными на сегодняшний день.…”

Development of the automatic load modelling system using PQM data on industry site

“…For these reasons, there were several researches about composite load modelling and measurement based approaching. [1][2][3][4][5] But there exists the problem about the data gathering because there are no measurement units and it is difficult to get a three-phase fault.…”