Online Power Assessment based on Risk theory
Power system is approaching its limits due to the deregulation of power industry and unavailability of new transmission corridor. However power system security assessment is carried out and the operating limits are set according to the given contingency list which might happen in very rare frequency. In other words, the frequency of fault occurrence and the risk of blackout is varied when the operating condition (load level, status of power equipment, and weather) changes. How can we do the security assessment based on the operating condition to get the best equilibrium between the security and the profit is the focus of this paper. The idea of risk based on-line power system security assessment is suggested. A precise calculation method of average failure rates of components is presented. Besides, operating condition based failure rates of components are also analyzed systematically in the paper. The Monte-Carlo simulation demonstrates the viewpoint of the paper.
Study of the Load Flow in Electrical Supply Networks AC/DC
The study of the Power flow is very significant, because it makes it possible to provide information of large importance; in order to better plan, to control and ensure finally the correct operation of the electrical supply networks. In our article, we present a method of calculation of the flow of powers in a mixed electrical supply network in high voltage (AC/DC). This method called also method SPI: (Substituted Power Injection) makes a small modification to the level of the bus of connection DC. The calculation of the active and reactive powers at the final bus of system AC-DC, are obtained by the subtraction of the powers of the converters and those which are specified with the bus of connection DC. This method will be applied to the 14 bus networks.
Computer Applications in Power Electronic Systems
Computer Applications in Power System is place an important role to verify the system performance and real time monitoring systems. Most of the Electrical system uses LABVIEW and other software to monitor real time electrical transition. In this paper we are focusing on Power Electronic Conversion system. Power Electronic System is easily simulated using MATLAB Software. Here we are giving easy simulation of Matrix converter and its result. Clean power development in power electronic system is an emerging area of research in Electrical Engineering. Most of the power electronic system introduces harmonics in power system. Elimination of harmonic is a tedious process. Different control strategy should be developed to reduce the harmonic. In Rectifier fed Inverter system has many disadvantages because of DC link filter. Matrix converter avoids this DC link filter and output approaches input. In this paper we have simulated Single phase Matrix Converter. Computer based simulation using MATLAB and Real Time implementation using PIC89C51 validate its originality. Finally we have compared different values of Harmonics.
Static Security Assessment of Power System
Security testing, based on what decisions should be made about the design, control and operation of a power system, is a challenging challenge for resource engineers and network designers, especially in high-power systems. Many methods have been suggested and used for this purpose, and a variety of indicators have been suggested to address the stable security of electrical networks. Large-scale data sets on a continuous scale increase the capacity of systems that require advanced knowledge in data analytics. In this review paper, numerical strategies and methods based on the machine are reviewed as the two main categories of static safety assessments in power systems based on the main features of the standard safety classification such as the type of separator, static safety indicator, and selection of features and output methods. This paper can be used as a useful reference for assessing the stable security of energy systems.
Load Flow Analysis by Newton Raphson Method
Load flow solutions are necessary for planning, operation, economic scheduling, exchange of power between utilities, etc. In the power system load flow problems can be solved very effectively by Newton-Raphson method. This method is introduced in 1961, Newton’s method is successive approximation procedure based on an initial estimate of unknown and the use of Taylors series expansion. This method gives load flow solutions by using reference standard bus and line data of system. In solution of load flow problem it gives magnitude of voltage at different buses as well as voltage angle, line to line active and reactive power flow. This method has been used to obtain load flow solutions and it is tested on IEEE 30-bus system. But finding solution theoretically takes long time so power flow analysis is done by the use of MATLAB programming
Automation in Load Shedding Using Microcontroller
The project is an automatic load operation system that controls load operation, multiple numbers of times according to programmed instruction. The project eliminates the manual ON/OFF switching of load. A real time clock (RTC) is used to track the time and automatically switch ON/OFF the load.This project is required for load shedding time management which is used when the electricity demand exceeds the supply and there comes a need for manually switching ON/OFF the electrical devices in time.Hence this system eliminates the manual operation by automatically switching the load ON/OFF. A matrix keypad is interfaced with the microcontroller from where the specified time is input to the microcontroller.When this input time equals to the real time, based on the commands the microcontroller initiates that particular relay to switch ON/OFF the load. The time is displayed on a seven segment display.