Power-flow study

About: Power-flow study is a research topic. Over the lifetime, 8091 publications have been published within this topic receiving 155053 citations. The topic is also known as: load-flow study.

Selection of Parameters of Stabilizers in Multimachine Power Systems

Abstract: This paper presents a technique for selecting the parameters of stabilizers in multimachine power systems. The technique enables the selection of the parameters of stabilizers such that specified improvements in the damping ratios of the poorly damped modes of oscillation are realized approximately. A numerical example of a multimachine system is presented to illustrate the proposed technique.

Evaluation of uncertainty in dynamic simulations of power system models: The probabilistic collocation method

Abstract: This paper explores the use of a new technique, the probabilistic collocation method (PCM), to enable the evaluation of uncertainty in power system simulations. The PCM allows the uncertainty in transient behavior of power systems to be studied using only a handful of simulations. The relevant theory is outlined here and simple examples are used to illustrate the application of PCM in a power systems setting. In addition, an index for identification of key uncertain parameters, as well as an example with a more realistic power system, are presented.

An Integrated Steady-State Operation Assessment of Electrical, Natural Gas, and District Heating Networks

Abstract: This paper studies a unified steady-state power flow analysis considering electrical, natural gas, and district heating networks all together. The important reason of such a view is the increasing utilization of cogeneration plants which makes a strong coupling between these networks. Another reason is the increasing usage of district heating networks because they have a higher efficiency besides a lower carbon dioxide emission than localized boilers. In this paper, interdependencies of the mentioned infrastructures are considered in detail including a nonlinear part-load efficiency performance for units. An integrated framework based on the Newton–Raphson technique is presented to solve the combined power flow problem and several case studies are utilized to demonstrate the applicability of the proposed methodology.

Power system modeling

Abstract: A discussion of the philosophy of modeling of three-phase transmission lines, three-phase transformers, three-phase generators, and power system loads is presented. Although the topic is very basic, the material covered is not all conventional. Single-phase representation of a three-phase power system is discussed in detail. Assumptions usually employed in the power industry are stated. Also discussed is the mathematical representation of a non-symmetrical three-phase power system in which the symmetrical-component method is not applied. An important aspect is the study of the models used in present-day problems as well as the models that may be required in the near future.