P-V curve and V-Q curve (often term as Q-V curve) are widely used for planning and operation studies. The P-V curve and V-Q curve of an unbalanced three-phase system, unlike the balanced three-phase system, may not have similar loading margin (LM) and reactive power margin (RPM) on each phase. Therefore, DIgSILENT Programming Language (DPL) has been used to study the maximum loading point (MLP)...

network with two feeders, eight DGs, and thirty-one loads is used as case study. The model of the network is implemented in DIgSILENT PowerFactory®, while the control algorithm runs in Matlab®. A number of simulation results is reported to witness the main characteristics and limitations of the proposed approach.

Flexible AC Transmission Systems (FACTS) devices have shown satisfactory performance in alleviating the problems of electrical transmission systems. Optimal FACTS allocation problem, which includes finding optimal type and location of these devices, have been widely studied by researchers for improving variety of power system technical parameters. In this paper, a DIgSILENT-based Discrete Parti...

Switching overvoltages (SOV) are considered a possible source of component failures experienced in existing offshore wind farms (OWFs). The inclusion of sufficiently accurate and validated models of the main electrical components in the OWF in the simulation tool is therefore an important issue in order to ensure reliable switching operations. Transient measurement results in an OWF are compare...

This paper presents the implementation work of IEC generic model of Type 1 wind turbine generator (WTG) in two commercial simulation tools: DIgSILENT PowerFactory (PF) and Matlab Simulink. The model topology, details of the composite blocks and implementation procedure in PF and Simulink environments are described. Case studies under both normal and fault conditions have been conducted with the...

This paper investigates the impacts of a wind farm connected at Harterbeespoort substation in South Africa on voltage stability of the power network. The site wind speed was determined and analyzed for viability. A comparison is made between the use of Doubly-Fed Induction Generators and Self-excited Induction Generators driven by the wind turbines. The resulting P-V and Q-V curves from load fl...

The accurate modeling of micro-grid access to power system planning and design stage needs is the primary problem to solve. This paper modeled the micro grid photovoltaic power generation system ,including silicon solar cell, photovoltaic inverters, battery energy storage system, and the micro power distribution system .The use of power system analysis software (DIGSILENT) of actual power syste...

This paper proposes an impact analysis on voltage unbalance of Plug-in Electric Vehicle (PEV) home charging in Thailand distribution system. The voltage unbalance is calculated with the voltage unbalance factor (%VUF) according to IEC 61000-2-4: 2000-06 standards and impact assessment with the new criteria of Provincial Electricity Authority (PEA) standards. The study uses distribution network ...

The article presents a comparison of basic powerflow studies, performed with a market available and a new self-developed power grid analysis software suite. The example of the Hungarian power system is used to show a blueprint process for creating computer models of large-scale electric systems, using dominantly openly available data sources. The first part of the article introduces the Hungari...