Power Systems Emt Simulations Articles & Analysis
21 articles found
Although reliability standards for electric power systems are well accepted, methods and metrics are not established for evaluating the effects of large–scale disruptions that exceed N − 1 criteria for bulk power systems. This paper introduces a model for simulating restoration of bulk power systems following such disruptions. The model allows analysts to simulate disruption of a bulk power ...
In this paper, data–driven system modelling, control, and fault detection technique for wind turbine systems are researched. The developed algorithm is to recursively update system parameters using predictor–based system identification (SID) technique. Updated system parameters are used to design subspace predictive controller for wind turbine systems with constraint on pitch angle and generator ...
In power system, the application of the power system stabiliser (PSS) has been proved to overcome the stability of power system. It is necessary to determine the appropriate PSS parameters. In this paper, a new cost function is presented for the tuning of PSS parameters. Optimisation of PSS parameters has been done by particle swarm optimisation algorithm. The power plant system that is simulated ...
In this paper, a new robust controller has been proposed for attaining the maximum safe instantaneous wind penetration. Particle swarm optimisation (PSO)-based algorithm has been developed to obtain the maximum safe instantaneous penetration by the optimisation of grid parameters. The developed algorithm has been tested on modified IEEE 14-bus system. The effectiveness of the proposed methodology ...
A detailed mathematical model of a multimachine power system with unified power flow controller (UPFC) has been developed with a view to control the active and reactive power flow in the transmission line and to improve transient stability performance. Thus, initial voltage and angles of the series and shunt voltage sources are computed and used during transient stability studies. After the power ...
This paper presents a new method for designing non-linear power system stabiliser to improve transient and dynamic stability. In these studies, a 4th order non-linear model of synchronous generator has been used. First, the existence of a diffeomorphism transformation for non-linear power system has been proved and then, the non-linear model has been transformed to a canonical form using ...
In this paper, a frequency control method is introduced for photovoltaic-diesel hybrid system by using a load estimator and an energy storage system. The proposed method is compared with an energy storage based conventional control method and with a fuzzy based frequency control method. Simulation results show that the proposed method is feasible to reduce the frequency deviations of the isolated ...
Concerns over global warming and high oil prices are expected to lead to a continuous increase in electricity generated by distributed renewable energy sources and small-scale embedded generators (SSEGs). This increase in SSEG will pose numerous technical challenges for distribution network operators. The small-scale energy zone (SSEZ) concept seeks to overcome these challenges using appropriate ...
In this paper, a new combined multipulse-multilevel inverter topology is proposed for static synchronous compensator to regulate AC supply voltage at a constant level. A detailed analysis of the operating characteristics of the various inverter topologies in respect of total harmonic distortion (THD) and device count are compared in the paper. A closed loop decoupled control strategy for ...
Indian power industry is undergoing deregulation at a rapid rate. In this transition phase, it is now essential to design the most appropriate market and suitable pricing schemes for the power sector. In this article, a restructured electricity market model for future Indian power market is explained which is based on the institutional frame work – The Indian Electricity Act 2003. The activities ...
There is a continuous discussion going on concerning the integration cost of wind power. The integration cost can, for example, be defined as the extra costs in the rest of the system when wind power is introduced, compared with the situation without wind power. The result of the studies depends on both parameters and the method used. The aim of this paper is to structure the methods in order to ...
In recent decades, several improvements have been achieved in power system operation and control. The evolution was mainly in the development of computational and communication systems. Both areas allowed the analysis of complex models of power system operation and control that resulted in a more flexible system controlled in almost real-time mode. All these improvements favoured the change of ...
Distributed Generation (DG) is predicted to play an important role in the electric power system in the near future. The insertion of DG systems into existing electric systems has a great impact on real-time system operation and planning. It is widely accepted that Microturbine Generation (MTG) systems are currently attracting much attention for meeting customers' needs in the ...
This paper describes a discrete event simulation model of the post-earthquake restoration process for electric power systems. The model explicitly represents the real-life restoration process, enabling development of geographically disaggregated, quantitative restoration curves with uncertainty bounds, a dynamic map showing the spatial distribution of outages changing over time, and information ...
This paper presents a procedure for modelling and simultaneous tuning of parameters of Thyristor Controlled Series Compensator (TCSC) controller and Power System Stabiliser (PSS) in a power system to damp power system oscillations. First, a simple transfer function model of TCSC controller is developed and the parameters of TCSC and PSS are simultaneously optimised. Genetic Algorithm (GA) is ...
This paper deals with determining the optimal location of single and multiple Static Synchronous Compensators (STATCOMs) for a long transmission line with predefined direction of real power flow so that maximum improvement in its transient stability performance is achieved. A systematic procedure is proposed to determine the optimal location of a STATCOM employing Genetic Algorithm (GA). The ...
Voltage stability has become an important issue in the planning and operation of many power systems. Contingencies such as unexpected line outages in a stressed system may often result in voltage instability which may lead to voltage collapse. This paper presents a Genetic Algorithm (GA) approach for solving the Voltage Security Constrained Optimal Power Flow (VSC-OPF) problem. Base-case ...
Power electronics continues to grow as an element of electrical loads. Most such loads, including motor drives, computer power supplies, and compact fluorescent lighting, serve to 'isolate' the load dynamics from the utility grid. The unfortunate effect is that these loads enforce local constant power behaviour. This tends to destabilise the supply system, resulting in voltage collapse. In this ...
Grid-connected inverters are key elements that interface the distributed energy sources with the grid. In this paper, a graphic modelling method based on switching flow graph is presented for modelling inverters, with a one-cycle controlled inverter as an example. This method features great simplicity and accuracy, and is compatible with dynamic system-simulation software, such as MATLAB. PSPICE ...
This paper presents the modelling of Distribution Static Compensator (D-STATCOM) used in isolated power systems. The model of D-STATCOM is developed using Power System Block-set (PSB) and Simulink toolboxes of standard MATLAB software. Two proportional integral PI controllers are used to control DC bus voltage and AC bus voltage regulation at the point of common coupling. Results are presented ...