Reusing three-phase power-flow object components for unbalanced harmonic analysis

In this paper, the harmonic penetration method is developed as a component-based application. The direct nodal voltage harmonic solution is developed as an independent software component and then integrated with existing three-phase power-flow software components. The harmonic solution reuses many facilities available in the fundamental frequency power-flow object components. The nonlinear devices such as six pulse converters are modeled as entity objects and inherited from the basic object-oriented power-system device model at fundamental frequency. Also, the linear solver also is reused form the power-flow component library. The application of object components shows that the development of complicated algorithms becomes easy due to the high code reusability

Application of Superconducting Magnetic Energy Storage (SMES) for Voltage Sag/Swell Supression in Distribution System with Wind Power Penetration

5 halama

Developed generalised unified power flow controller model in the Newton–Raphson power‐flow analysis using combined mismatches method

This study proposes the generalised unified power flow controller (GUPFC) model in the hybrid current power mismatch Newton-Raphson formulation (HPCIM). In this model, active power, real and imaginary current components are injected at the terminals of series impedances of GUPFC. These injected values are calculated during the iterative process based on the desired controlled values and buses voltage at the terminals of GUPFC. The parameters of GUPFC can be calculated during the iterative process and the final values are updated after load flow convergence. Using the developed GUPFC model, the original structure and symmetry of the admittance and Jacobian matrices can still be kept, the changing of Jacobian matrix is eliminated. Consequently, the complexities of the computer load flow program codes with GUPFC are reduced. The HPCIM load flow code with the proposed model is written in C++ programming language. Where, the SuperLU library is utilised to handle the sparse Jacobian matrix. The proposed model has been validated using the standard IEEE test systems

Development of power system analysis software using object components.

This paper presents experiences of developing a power system analysis software using a combination of Object Oriented Programming (OOP) and Component Based Development (CBD) methodologies. In this development, various power system analyses are developed into software components. These components are integrated with graphical user interface components to build up a power system analysis application. By using both OOP and CBD methodologies, updating or adding new algorithm can be done to any specific component without affecting other components inside the software. The component also can be replaced with any other better component whenever necessary. Hence, the software can be maintained and updated continuously with minimum resources. The performance of the components is described in comparison with the non-component applications in terms of reuse as well as execution time

A Multi-Objective Optimization Approach towards a Proposed Smart Apartment with Demand-Response in Japan

In Japan, residents of apartments are generally contracted to receive low voltage electricity from electric utilities. In recent years, there has been an increasing number of high voltage batch power receiving contracts for condominiums. In this research, a high voltage batch receiving contractor introduces a demand–response in a low voltage power receiving contract, which maximizes the profit of a high voltage batch receiving contractor and minimizes the electricity charge of residents by utilizing battery storage, electric vehicles (EV), and heat pumps. A multi-objective optimization algorithm calculates a Pareto solution for the relationship between two objective trade-offs in the MATLAB ® environment