Estimation of flicker generating feeders index with combined sampling-simulation method
Subject Areas : Intelligent Multimedia Processing and Communication Systems (IMPCS)
Peyman
Nazarian
1
(Faculty of Electrical and Computer Engineering, Islamic Azad University, Zanjan branch)
Keywords: Flicker index, Flicker short term index, Flicker long term index, Flicker tracking, Sampling,
Abstract :
In this article, the background of the subject and the works done in the field of flicker simulation and tracking are mentioned first, and then the new combined simulation-sampling method to estimate flicker indicators is described. In the following, the computer program FSP, which was developed to analyze and track flicker caused by heavy industrial subscribers, based on the method of this article, is introduced. This software includes the needs of the Zanjan regional electric company in this field and by using the available hardware and data facilities and taking into account the existing limitations; it has the ability to study on flicker and estimate flicker indicators. In the following, using the data extracted from one of the 230 kV substations under the management of the Zanjan regional electricity company, flicker is calculated and studied in a typical network. Checking the Flicker indicators, in cases where it is not possible to actually cut off the feeders, is easily done by the FSP software, and it makes it possible to track flicker generating subscribers and estimate the flicker share of each of them. Introduction Flicker is a physiological phenomenon that is defined as a non-permanent sensory effect of a light source on the human eye, and this effect is caused by the change of flux or spectral distribution of the light source with time. Method The proposed method consists of two practical and theoretical parts, the practical part of which is the measurement of the required parameters of the network and the theoretical part, software calculations to determine the short-term and long-term flicker indicators, which will be obtained by simulating the behavior of the standard flicker meter. Results In this article, it was seen that checking the flicker indicators in situations where it is not possible to actually cut off the feeders, can be easily done by the designed software, and it gives the power companies the possibility to make a better decision to reject or accept the subscribers before signing the contract, or it makes it possible to track and identify the flicker generating subscribers. Discussion Due to the limitation in the sampling frequency, a measure has been taken to be more compatible with the flicker standard; In this way, an algorithm for performing linearization between the voltage samples obtained from the load flow has been used.
