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The paper introduces an approach to investigate voltage sags, which are caused by large generator rotor swings following a transient disturbance. Therefore, the method exploits sensitivities derived from the algebraic network equations. These provide information on the impact of a generator on the voltage magnitude at a load bus and the effect of load variation on the generator's power injection....
The transformation of the power system in terms of efficiency and sustainability will further lead to increasing converter-coupled generation and demand. This changes the system's characteristics and influences its stability. Despite these fundamental changes, the secure operation of the power system must be maintained at all times. DG and any converter-coupled generation of relevant size are requested...
The Upington area within South Africa is well-endowed with solar resources, with relatively high annual solar radiation recorded compared to other parts of the country. The distribution network in the area comprises very long lines, has very low fault levels, and is very prone to voltage dips. Previous studies [1] have investigated the feasibility and network considerations of connecting concentrating...
Integrating renewables into grids to any considerable degree can expose the system to issues that need attention lest the functionality of the grid be impaired. Such issues can be voltage fluctuations, frequency deviations, and deterioration of power quality. By utilization of FACTS devices such as SVC, STATCOM, and Series Capacitors, grid function can be maintained and even improved, enabling increased...
The power system analysis studies serve as the basis for ensuring reliability, improving system performance and power quality, reducing operating costs, and providing a reliable supply power during system operation. Thus, this paper presents a case study for designing power supply system for an offshore platform which will include load flow study, short circuit study and transient stability study...
Like conventional power plants, wind power plants must provide the power quality required to ensure the stability & reliability of the power system. Increasing amount of wind turbine are connected to electrical power system in order to mitigate the negative environmental consequence of conventional electricity generation. While connecting wind turbine to grid it is important to understand source...
The following topics are dealt with: distribution systems; fault location; fault protection; wind power plants; control stabilizer; power markets; transient stability; control centers; renewable sources; voltage stability; voltage control; security assessment; planning; maintenance; power quality; restoration; power electronics; load forecasting; distributed generation; and scheduling.
In recent years, there has been a worldwide growth in the exploitation of wind farms. Because of increasing wind generation, growing non-liner loads and competitive electricity markets the operation mechanism of power systems are facing some problems such as transient stability, voltage regulation, damping of power oscillation, power flow control, etc. Among shunt FACTS devices STATCOM has been recognized...
This paper is concerned with the transient stability of variable-speed wind turbines with permanent magnet synchronous machines at a pitch control malfunction. As wind power generation undergoes rapid growth, new technical challenges emerge: dynamic stability and power quality. We study the influence of a pitch control malfunction on the quality of the energy injected into the electrical grid, analyzing...
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