optimal reactive power dispatch (orpd) is a multi-variable problem with nonlinear constraints and continuous/discrete decision variables. due to the stochastic behavior of loads, the orpd requires a probabilistic mathematical model. in this paper, monte carlo simulation (mcs) is used for modeling of load uncertainties in the orpd problem. the problem is formulated as a nonlinear constrained mul...

The capacity of renewable distributed generation (DG) connected in distribution networks is increasing. Use power electronic interfaces means DG can inject harmonic currents through the point common coupling into upstream networks. limits stipulated emission standards may create challenges for accommodating DG. To explore impact regulations on ability to host DG, this work incorporates voltage ...

Harmonics have become an important issue in modern power systems. The widespread penetration of non-linear loads to emerging power systems has turned power quality analysis into an important operation issue under both steady state and transient conditions. This paper employs a Dynamic Harmonic Domain (DHD) based framework for dynamic harmonic analysis of VSC-HVDC systems. These systems are wide...

Turning to Renewable Energy Sources (RES) is the most logical politics in securing the modern society from critical changes in earth increasing temperature. However, Distributed Generation (DG) sources could lead to new challenges in electricity network, mainly allocation of DG sources in distribution level of power system will set the existing network under stress of power flow parameters. The...

this paper presents a probabilistic confidence-interval based method for optimal placement of shunt capacitors in distribution networks by considering probabilistic characteristics of loads. the main objective function are reducing loss and improving the voltage profile. backward forward sweep method has been employed to obtain the power flow results in distribution system. in addition, integer...

A comprehensive model for stochastic load flow analysis in electric power systems is proposed for the purpose of estimating the statistics of bus voltage magnitudes, circuit currents and transmission line power flows. The proposed method is driven by a realistic nonconforming stochastic electric load model, defined in terms of few independent stochastic processes; it is based on the quadratized...

During the last decade power system have been equipped with complex components such as Distribution Static Var Compensators (D-SVCs). These components have introduced new possibilities to control power systems, D-SVCs can almost continuously change the amount of reactive power from capacitor banks. The behavior of these new components is different from 'old' technologies since they contain powe...

The uncertainty of renewable energy sources (RESs) presents a challenge for power grid operation. To analyze the variability RESs, probabilistic flow (PPF) method has been introduced. This can be used to evaluate RES generation and its effects on system voltage flow. In this study, an analytical approach with PPF calculate line sensitivity by is proposed, which directly probability distribution...