Search results for: Muhamad Reza
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IEEE Transactions on Power Delivery > 2017 > 32 > 3 > 1165 - 1172
In this paper, a black-box vacuum circuit-breaker model is developed and its parameters are calculated. The developed model is deterministic and does not include the stochastic behavior of arc interruption. The phenomena, such as the current chopping, high-frequency current quenching capability, and rate of rise of dielectric strength are treated as deterministic and calculated using mean values....
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This paper presents the improved dynamic performance of the National Grid of Pakistan by the application of a 50(ind)/450(cap) MVAR SVC system at the 220/132kV New Kotlakhpat (NKLPT) Substation in Lahore — the first project of its nature in Pakistan. This paper demonstrates results from voltage stability studies carried out in PSSE using dynamic load models showing the voltage recovery without and...
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European Transactions on Electrical Power > 22 > 5 > 704 - 720
In many papers, in dealing with bifurcation analysis of power systems, the power system is modelled as an ordinary differential equation system, in order to conveniently use the theory and numerical tools developed for bifurcation analysis of ordinary differential equation systems. We explain in this work how state‐of‐the‐art numerical techniques for bifurcation analysis, not well known in the power...
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Increasing wind power penetration in power systems has resulted in an urgent need for the assessment of their impact on grid security. Besides the participation in voltage control, there also exists a growing interest in the delivering of other ancillary services like power-frequency control. This paper investigates further the technical feasibility of delivering frequency support with wind turbines...
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IEEE Transactions on Industry Applications > 2012 > 48 > 5 > 1628 - 1638
This is the second part of a two-paper series. The first paper presented the transient modeling methodology for various components of wind power plants (WPPs). This paper presents a general methodology for transient analysis of WPPs and discusses case studies which investigate some of the most important high-frequency interactions between different components of the WPP. The focus has been on switching...
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This is the second part of a two-paper series. The first paper presented the transient modelling methodology for various components of Wind Power Plants (WPPs). This paper presents a general methodology for transient analysis of WPPs, and discusses case studies which investigate some of the most important high frequency interactions between different components of the wind power plant. The focus has...
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This paper presents two of potential technologies in the power engineering world, namely: the HVDC transmission technology and the Flexible AC Transmission Systems (FACTS) that are potential for strengthening the Indonesian grid infrastructure.
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Aggregation methodologies for creating equivalent wind farm models are needed for power system transient stability studies involving large wind farms. One strong argument in the literature suggests single machine equivalent representation of wind farm with the assumption that all wind turbines receive the same incoming wind speed and thus operate at the same loading condition. In this paper, we examine...
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The current work focuses on two specific issues concerning grid-connected solar PV units, i.e. the fault ride-through capability, also called low voltage ride-through capability, and the voltage support function through reactive power injection during faults. With the first one the PV unit can actually provide some limited grid support, whereas with a defined reactive power characteristic it can give...
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Charging PEVs (Plug-In Electric Vehicles) at public fast charging station can improve the public acceptance and increase their penetration level by solving problems related to vehicles' battery. However, the price for the impact of fast charging stations on the distribution grid has to be dealt with. The main purpose of this paper is to investigate the impacts of fast charging stations on a distribution...
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With the background of experience from field investigations in cable networks, multiple pre-strikes and re-ignitions are known to occur during switching operations, causing high frequency, steep fronted transient voltages and currents. Off-shore collection grids consist of vast amount of cables, with different length and connection points, which have low surge impedance compared with overhead lines...
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• The experiments verify the occurrence of repetitive pre-strikes and re-ignitions determined by the electrical circuit and the point on wave. • The experiments show a high number of repetitive voltage transients below the ZnO arrester protection level occurring at the transformer terminals. • Repetitive voltage transients have been recorded and analyzed, showing time derivatives at e.g. the transformer...
