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Publications (19)
![Network demand variation in 24 h [24].](publication/388493544/figure/fig3/AS:11431281306179600@1738197594711/Network-demand-variation-in-24h-24_Q320.jpg)
![Energy and regulation market price at each hour of a day [30].](publication/388493544/figure/fig4/AS:11431281306217885@1738197594884/Energy-and-regulation-market-price-at-each-hour-of-a-day-30_Q320.jpg)
Bilateral energy transactions between electric vehicles (EVs) and the power grid are managed by entities called aggregators (AGGs) who work as private or network operator’s agents. The remarkable effects of the AGG’s behavior on network parameters entail the provision of coordinated schedules and consideration of network conditions and constraints....
As the application of online partial discharge (PD) measurement increases the importance of denoising becomes more and more obvious. Besides denoising a PD signal to detect and calculate discharge amplitude, pulse reconstructing is required to compute rise time, fall time and other features which play a crucial role in determining discharge severit...
Partial discharge (PD) activity can be destructive to the transformer insulation, and ultimately may result in total breakdown of the insulation. Partial discharge sources identification in a power transformer enables the operator to evaluate the transformer insulation condition during its lifetime. In order to identify the PD source; in the case o...
Partial Discharge (PD) measurement is one of the main methods for condition monitoring of Gas Insulated Switchgears (GIS). Internal Ultra High Frequency (UHF) sensors can be applied for capturing PD propagated electromagnetic signals within the GIS. PD sensor placement inside the GIS is one of the main challenges for designing an online PD measurin...
Different components of the Gas Insulated Switchgear (GIS) structure can have impacts on Partial Discharge (PD) Electromagnetic (EM) wave propagation. This is important in selecting PD sensor placement to provide an optimum sensitivity in its measurement and to provide accurate localization of PD sources within the GIS. In this paper, impact of the...
Abstract: A better performance and consequently the widespread use of polymeric insulators in different parts of the power grid
can increase their role in the grid reliability. The accumulation of contamination and housing-erosion are the two most effective
factors in undermining the performance of this type of insulators. Therefore, electric utili...
The general method for identifying the partial discharge type in a power transformer is based on their fingerprints in the form of phase-resolved discharge patterns. In the case of multiple defects, traditional clustering methods can be applied for separation of active sources. However, such an approach is impractical for online real-time monitorin...
Partial discharge (PD) measurement and identification have great importance to condition monitoring of power transformers. In this paper, a new method for recognition of single and multi-source of PD based on extraction of high level image features has been introduced. A database, involving 365 samples of phase-resolved PD (PRPD) data, is developed...
Transformers are the key component in power system transmission and distribution networks. Condition based maintenance will increase their expected life and online monitoring is essential to ensure operation reliability. In this paper, a new approach to transformer online monitoring is provided based on partial discharge (PD) measurement. Simultane...
Power transformer partial discharge signal measurement using Radio Frequency method has advantages over IEC 60270 ‘apparent charge’ measurement method for online monitoring due to greater immunity against external interference. However, the lack of a well-defined calibration relationship between the two methods is main disadvantage of RF method. Si...
Transformers are known as one of the most important equipment in power system transmission and distribution networks. Partial Discharge (PD) measurement and PRPD interpretation is a powerful tool to monitor the situation and evaluating the risk of power transformer failure. Multiple discharge sources affect the accuracy of interpretation of PRPD. T...
Transformers are known as one of the most important equipment in power system transmission and distribution network. Safety of transformer insulation is determined mainly by its insulating oil dielectric strength. A major concern which threaten the withstand strength of a liquid insulation is the presence of particle contamination. One of the best...
