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This paper presents the use of PHEVs with photovoltaic sources as an implementation of Vehicle to Grid (V2G) technology for designing a photovoltaic shunt active filter (PV-AF) system to improve power quality of photovoltaic generation. A system model with photovoltaic generation and a dynamic model of PHEVs are introduced here based on third order battery model. A simple battery scheme is proposed...
In this paper, charging effect of dynamic Plug in Hybrid Electric Vehicle (PHEV) is presented in a renewable energy based electricity distribution system. For planning and designing a distribution system, PHEVs are one of the most important factor as it is going to be a spinning reserve of energy, and also a major load for distribution network. A dynamic load model of PHEVs is introduced here based...
The classical definitions of various centrality measures are modified to incorporate electrical parameters of the power grid. In this paper three distinct measures of centrality are presented and they are described with suitable examples. The usefulness of these measures are described. Various standard test systems are simulated to find critical nodes of the system. Complex network is a new area of...
Voltage profile of distribution networks with distributed generation are affected significantly due to the integration of distributed generation (DG) on it. This paper presents a way to control voltage of distribution networks with DG using reactive power compensation approach. In this paper, the voltage control approach is shown based on the worst case scenario of the network. To keep the voltage...
In this paper, simulation results showing the effect of lower and higher penetration of distributed wind generation on the voltage profile in distribution systems have been presented. The analysis is carried out over two distribution test systems. The detailed mathematical modeling of the system is also presented. It also investigates the small-signal stability of distribution systems using eigenvalue...
A method of critical node identification in a power system is presented in this paper. Maximum flow in a network is used to measure centrality of various nodes in the power system. The proposed approach is an improvement of previous methodology in the sense that it does not take into consideration shortest electrical distance as path to flow power. Instead of using normal steady-state condition maximum...
This paper presents a nonlinear excitation controller design technique for interconnected power systems. A zero dynamic design approach is used to design the controller which is useful when the system is partially linearizable and the obtained control law, using this approach is simpler as compared to that of a fully or exactly linearizable system. The performance of this controller is tested on a...
Integration of distributed generation (DG) in distribution network has significant effects on voltage profile for both customers and distribution network service providers (DNSPs). This impact may manifest itself positively or negatively, depending on variation of the voltage and the amount of DG that can be connected to the distribution networks. This paper presents a way to estimate the voltage...
This paper presents the application of FACTS devices for the enhancement of dynamic voltage stability in distribution networks with distributed wind generation. The analysis is carried over a test distribution system representative of the Kumamoto area in Japan. The detailed mathematical modelling of the system is also presented. Firstly, this paper provides simulation results showing the effects...
The complexity of power systems has increased in recent years due to the operation of existing transmission lines closer to their limits, using flexible AC transmission system devices (FACTS), and also due to the increased penetration of new types of generators that have more intermittent characteristics and lower inertial response, such as wind generators. This changing nature of a power system has...
In this paper, a new methodology for stability assessment of a smart power system is proposed. The key to this assessment is an index called betweenness index which is based on ideas from complex network theory. The proposed betweenness index is an improvement of previous works since it considers the actual real power flow through the transmission lines along the network. Furthermore, this work initiates...
This paper presents a power system model transformation, using the mean-value theorem, to an equivalent linear model which is made up of two Jacobian matrices — one evaluated at the equilibrium point and another at the mean-value point. The Jacobian at the equilibrium point is normally used for control design and the other Jacobian in considered as unmodelled dynamics or uncertainty. In this paper...
This paper presents the use of PHEVs in wind farm as an implementation of Vehicle to Grid (V2G) technology for power smoothing in generation systems, where power flow variations can occur. A system model with wind farm and a dynamic model of PHEVs are introduced here based on third order battery model. A feed forward compensating control strategy is presented to improve the wind farm's performance...
In this paper, the modelling of distribution network with Doubly Fed Induction Generator (DFIG) is presented in a different way where the resistances of the lines are considered. Induction motor is considered as dynamic load which causes the voltage stability problems in power distribution system. Based on this modelling, this paper presents an analysis to investigate the critical parameters for distribution...
This paper presents the impact of different types of load models in distribution network with distributed wind generation. The analysis is carried out for a test distribution system representative of the Kumamoto area in Japan. Firstly, this paper provides static analysis showing the impact of static load on distribution system. Then, it investigates the effects of static as well as composite load...
Distributed generation (DG) units reduce electric power losses and hence improve reliability and voltage profile. Determination of appropriate size and location of DG is important to maximize overall system efficiency. In this paper, an optimization method has been presented to determine the appropriate size and proper allocation of DG in a distribution network. Results obtained from this method have...
Power loss of a distribution system can be reduced significantly by using optimum size and location of distributed generation (DG). Proper allocation of DG with appropriate size maximizes overall system efficiency. Moreover it improves the reliability and voltage profile of the distribution system. In this paper, IEEE 123 node test feeder has been considered to determine the optimum size and location...
This paper investigates the effect of STATCOM in stabilising multi-mode torsional oscillations of sub-synchronous resonance (SSR) of a large turbine-generator set. The study is performed on system-1 of the second IEEE benchmark model for computer simulation of subsynchronous resonance. The application of the STATCOM in improving transient stability in power systems is described as well. EMTDC/PSCAD...
For large scale analysis of power grid using complex network framework a network matrix is formed. The elements of the matrix represents the pair dependency of various buses of the system. This matrix could be used as a measure of centrality of various buses of a power system. A simple test system is used to illustrate the idea behind the dependency matrix of the power system as well as to demonstrate...
This paper presents the use of PHEVs with wind farm as an implementation of Vehicle to Grid (V2G) technology for designing a shunt active filter to improve power quality of wind generation. A system model with wind generator and a dynamic model of PHEVs are introduced here based on third order battery model. A simple battery scheme is proposed for the control of the charging and discharging of the...
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