Measurement-based Load Modeling Validation by Artificial Three-phase Short Circuit Tests in North East Power Grid

Abstract

The researches on measurement-based load modeling have been continued for more than twenty years in China. However, since lacking of system measured data of major disturbance, it is doubtful for load model generalization capability, and more attentions are also caused for the issue that whether dynamic simulations adopting the measurement-based load model accord with the real system. The measurement-based load modeling technology was put into practice in North East Power Grid in 2002, and load models based on field measurement were relatively constructed. There were four artificial three-phase short circuit tests in 2004 and 2005 respectively in North East Power Grid, and the measured dynamic data from PMU and load data from load characteristics recorders validated the constructed load models and checked the generalization capability of the load model. The well generalization capability of the measurement-based load models verifies the validation of measurement-based load modeling technology.

Analyzing effects of seasonal variations in wind generation and load on voltage profiles

“…For the ℎth halfhour of the summer season, let the normalized commercial and industrial daily load be represented as , and , , respectively. For the ℎth half-hour of any season, the residential daily load in MW can be obtained as shown in (8).…”

“…The energy consumption values are obtained from [10]. In (8), represents the area under the daily load curve for residential loads in the th season. In ( 9) and (10), and represent the area under the daily load curves for commercial and industrial loads, respectively, in summer.…”

“…This paper proposes a measurement based approach for analyzing seasonal variations in wind generation. Load modeling has been usually done on an event-by-event basis [7], [8]. The effect of seasonal variations on the load profiles has also not been explored in great details yet.…”