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Showing 1 to 20 of 69 for “"load flow"”.
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Applications of load flow by hybrid computer
… the usefulness and practicality of the hybrid load flow program. After the load flow program was defined, the desirability for rapid solution times in certain applications was explained. An analog model of an electric power system was developed. This model included representations of …
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LOAD FLOW ANALYSIS IN COMPOSITE SYSTEM RELIABILITY EVALUATION
… outage situations. This involves numerous load-flow studies for different system component outage conditions. The Object of this research project is to examine the existing methods suitable for repeated load-flow analysis in composite system reliability evaluation. A new method and a few …
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The ladder load-flow method extended to distribution networks
The rigorous load-flow analysis of Distribution Networks requires the modeling of mutual coupling, multiphase possibilities and unbalanced loading. The Ladder Load-Flow Method meets these requirements, but is limited to radial systems. The Switch Compensation Method presented here, extends the …
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Multireference power system modeling and multiphase load flow analysis
… of network imbalances and unbalanced phase loadings. In grounded-wye systems, currents that flow in the earth can have significant effects on the system's behavior. Both these effects must be considered in an accurate multiphase power system model. A new treatment of multiphase power system …
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A study of optimal load flow using nonlinear programming
Power systems optimal load flow studies are performed for standard test cases using several methods of minimization. Comparisons of the solutions are made based on digital computer results. A general discussion is made of optimization and the necessary conditions for solution. Cost functions are …
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New methods for load flow calculation without any swing bus.
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1971
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Generating random power grids for the verification of new load flow solvers
… expand the rigor of the development of new power flow solvers through graph generation. The use of the IEEE standard test cases as benchmarks is commonplace in literature, where they are used to demonstrate the effectiveness of new algorithms. This results in the use of as little as two to five …
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Extending the Herman-Beta transform for probabilistic load flow analysis of radial feeders
… susceptible to voltage-rise and equipment overload conditions, while the levels of uncertainty associated with the power system’s parameters increase significantly. The resulting networks characterised by the bi-directional flow of power, uncertainty from stochastic customer load variations and …
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Digital load flow analysis using general matrix storage and non-zero element storage
This thesis deals with the AC Load Flow Problem and the comparison of two different solution techniques. The basic solution used was the Newton Raphson method. The two methods used to solve for the corrections to the bus voltages are general matrix storage and nonzero element storage. In the …
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Loss minimization in the modified algorithm of load flow analysis in industrial power system
… minimization using B-loss formula in solving load flow analysis. A modeling of electrical system elements is first developed. A literature review on the history and development of load flow analysis and loss minimization especially on the use of B-loss formula are delivered. A report on load …
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Segflow: a new object-oriented load flow which uses trace methods and affiliation objects
… a new alternative type of object-oriented load-flow called Segflow. Segment objects are used to support the modeling of individual types of power system equipment. Current and voltage trace techniques are used by Segflow to bind Segment models in support of Kirchoff’s laws. Affiliation …
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A sequential approach of solving second order AC-DC load flow and state estimation problem
Load flow and state estimation problems are solved for an economic and efficient operation, and an effective and stable control of the power system. Several methods are available to solve these problems, yet new ones are developed with a view to enhance the computational efficiency and convergence …
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Load Flow Study for Utility-Scale Wind Farm Economic Operation and Reactive Power Grid Compliance
… the creation of an Excel tool to perform a load flow study given inputs for a wind farm using Newton-Raphson algorithms. Next, the results of the load flow analysis will be compared to an actual operating wind farm located in Texas to review the accuracy of the scenarios. Finally, …
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Optimal placement and effect of a wind farm on load flow and protection systems in a municipal distribution network
Much research has been done on the effects of distributed generation on network characteristics. However, little research has been done on the effects of this distributed generation on current network protection schemes. An IPP has approached a South African municipality regarding the connection of …
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Comparison of Power Flow Algorithms for inclusion in On-line Power Systems Operation Tools
… this thesis is to develop a new, fast, adaptive load flow algorithm that "automatically alternates" numerical methods including Newton-Raphson method, Gauss-Seidel method and Gauss method for a load flow run to achieve less run time. Unlike the proposed method, the traditional load flow analysis …
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Development of virtual reality software for the design of spatial compliant mechanisms on oculus rift device
… mechanisms, that were challenging to implement load flow visualization method on pen and paper. Some of the challenges include the three-dimensional visualization of the truncated hemispherical band (intersection between the modified input and output hemispherical bands), freedom ray and …
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A modular real-time hardware-in-the-loop simulation environment for microgrids
In this work, a real-time load flow solver that solves for the complex bus voltages in a 4-bus electrical network (with 1 bus as the swing/reference bus) was designed and implemented. Simple Distributed Generator (DG) models were written in C++, with a 3-phase inverter always as the last sub-system …
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Power system analysis on programmable calculators
… calculators. Algorithms for four different load flow techniques are developed and tested on the HP9830A programmable calculator. The transient stability analysis problem is reviewed, with special attention being given to the solution of the system performance equations by either the bus …
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