Application risk theory for transient security assessment of the real power system

Author(s):  
Shujun Liu ◽  
Jie Chen ◽  
Ping Liu
Author(s):  
Yogesh Kumar Bichpuriya ◽  
P K Kalra ◽  
Ajay Kumar Saxena

Security assessment of a power system is very important function to detect any violation in the system and to ensure secure operation of the system in deregulated environment. Contingency ranking is the process of indexing the possible contingencies of system on the basis of their severity. The contingencies of higher ranking are further analyzed for detailed analysis. The contingencies based on the real power flow and the voltage deviations should be dealt simultaneously for better ranking. The paper presents fuzzy approach to combine ranking based on MW and Mvar losses and a new rank list is prepared. The proposed approach is tested on IEEE-30 bus test system.


2015 ◽  
Vol 799-800 ◽  
pp. 1199-1205 ◽  
Author(s):  
Ilya D. Polyakov ◽  
Stepan A. Dmitriev ◽  
Pavel V. Chusovitin

This paper is devoted to the study of distributed generation units impact on pricing on the wholesale power energy market. The paper deals with results the analysis of the wholesale electricity market and power. This analysis is necessary for proper impact assessment of distributed generation units on a total optimization. Optimization calculations performed for the real power system, when distributed generation units operating the basic and peak modes, as well as the cost-effectiveness of this modes.


2020 ◽  
Vol 8 (5) ◽  
pp. 3763-3770

Power quality is a comprehensive term used to estimate the caliber of the power system in delivering high-grade supply and is an interesting study to ensure customer satisfaction. DSTATCOM is one of the custom power devices used to refine the power system parameters especially to ensure that the source current contains acceptable harmonic limit. Parallel connected DSTATCOM is a topology with two parallel DSTATCOMs connected to the point of common coupling for harmonic reduction in source current and improving the power quality. Each of the two parallel DSTATCOMs has its individual DC storage source to adjust the real power deficit to the system (during load transients). This paper presents a common DC-Link fed parallel DSTATCOM topology for power quality improvement. Unlike the conventional parallel DSTATCOM topology, common DC-Link fed parallel DSTATCOM topology employs only one DC-Link source reducing the number of DC sources, cost and increases reliability. The single DC storage source adjusts the real power deficit to the system. In this paper, IRP control methodology delivers the control pulses to parallel DSTATCOM. The proposed system is tested with variable and constant load operations and the results are presented using MATLAB/SIMULINK software.


2018 ◽  
Vol 9 (1) ◽  
pp. 89-100 ◽  
Author(s):  
P. Balachennaiah ◽  
M. Suryakalavathi ◽  
P. Nagendra

2013 ◽  
Vol 61 (2) ◽  
pp. 371-377
Author(s):  
M. Siwczyński ◽  
A. Drwal ◽  
S. Żaba

Abstract The simple digital filters are not sufficient for digital modeling of systems with distributed parameters. It is necessary to apply more complex digital filters. In this work, a set of filters, called the digital function filters, is proposed. It consists of digital filters, which are obtained from causal and stable filters through some function transformation. In this paper, for several basic functions: exponential, logarithm, square root and the real power of input filter, the recursive algorithms of the digital function filters have been determined The digital function filters of exponential type can be obtained from direct recursive formulas. Whereas, the other function filters, such as the logarithm, the square root and the real power, require using the implicit recursive formulas. Some applications of the digital function filters for the analysis and synthesis of systems with lumped and distributed parameters (a long line, phase shifters, infinite ladder circuits) are given as well.


2018 ◽  
Vol 28 (1) ◽  
pp. 345-350
Author(s):  
Ali Hajro

The Current and future leaders live in a turbulent and chaotic environment, where the real power of acting derives from the recognition of the concept of change and looking for options. In this type of environment a lot of competence is necessary for the leaders to survive. The aim of this study case was to explore i.e. gain a clearer picture of the position of the leader, their characteristics, functions, levels, the core and the factors affecting the leader and their leadership. To see what type of leader the people want simply to draw conclusions about the characteristics, qualities and techniques of a leader and their leadership. So that in the end, to have empirical proof of the leader. The set goal in this study case is today’s leaders in everyday process, starting from the very beginning of their work, to serve as an example in developing inter-personal skills at the same time as treating people with dignity and respect. In other words, they have to possess leadership skills, characteristics and the necessary actions. This research aims at finding out the real attributes that is the profile of a leader and their leadership running an organization regardless if it is economic, political, and military or some other non-governmental organization. The values are more than a set of rules, they are not only behavior code, and they say what a leader should be every day in every action that they take. The values shade the leaders’ identity and the organization that they run.


Author(s):  
Kanagasabai Lenin

This paper proposes Enhanced Frog Leaping Algorithm (EFLA) to solve the optimal reactive power problem. Frog leaping algorithm (FLA) replicates the procedure of frogs passing though the wetland and foraging deeds. Set of virtual frogs alienated into numerous groups known as “memeplexes”. Frog’s position’s turn out to be closer in every memeplex after few optimization runs and certainly, this crisis direct to premature convergence. In the proposed Enhanced Frog Leaping Algorithm (EFLA) the most excellent frog information is used to augment the local search in each memeplex and initiate to the exploration bound acceleration. To advance the speed of convergence two acceleration factors are introduced in the exploration plan formulation. Proposed Enhanced Frog Leaping Algorithm (EFLA) has been tested in standard IEEE 14,300 bus test system and simulation results show the projected algorithm reduced the real power loss considerably.


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