Basic power world simulator projects
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The schmetic system is simulated in Power World Simulator and it can show the Power Flow also. Following schematic system is used to understnad the method. To understnad the method, we can take two cases such as When PV Buses are absent and another is When PV Buses are present. So, it is suitable for the power flow study of small power system. This modification will reduce the numbers of iterations. It is a modification of Gauss-Iterative method. Gauss-Seidel (G-S) method is one of the simplest iterate method. Another drawback is that this method may not converge, if the solution does not exist or if the iteration process is divergent. The main disadvantage of this method is that it requires an extremely large number of iterations to reach sufficiently close to the solution, but with the use of computers it may not be thought of as a drawback. The process is continued until the difference between successive estimate is extremely negilible. The second estimate is used to find the third estimate. Then, this guessed solution is used in conjuction with the original equation to cmpute a new and more accurate estimate for the solution can be used. In this method, non linear equations can be solved by guessing the initinal solution approximately. The load flow problem can be formulated as a set of nonliner algebraic equations, which can be solved by an iterative algorithm called Gauss method. To understand the the load flow analysis, the knowledge of various Bus such as Load bus, Voltage controlled bus (Generator bus), Slack bus and thier data is required for applying any iterative techniques such as Gauss-Seidel method, Newton- Raphson Method and Fast-decoupled method. In actual practice, it will be required to carry out numerous power flow solutions under a variety of conditions. The load flow solution also gives the initial conditions of the system when the transient beheviour of the system is to be studied.
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The main purpose of any Load Flow Analysis is to compute precise steady-state voltages and voltage angles of all buses in the network, the reactive and real power flows into every overhead trasnmission line and power transformer (located at Sub-stations), under the assumption of known generation and load. Load Flow Analysis results play major role during the operational stages of any power system for its control and economic schedule, as well as during the expansion or design stages.
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The Load Flow Analysis is a very fundamental and important tool in interconnected power system analysis.