Off-grid Power System Configuration

Import 03/11/2016Cílem této bakalářské práce je navrhnout optimální konfiguraci ostrovního systému, neboli energeticky soběstačného domu. V úvodu práce jsou popsány základní prvky ostrovního systému. Následuje popis vlastní spotřeby konfigurace a její analýza pomocí měření. Ze získaných poznatků byl poté vypracován návrh na výrobu elektrické energie pomocí dvou nezávislých zdrojů, její uskladnění v akumulátorech a návrh všech komponentů pro využití tohoto systému v praxi tj. komponentů potřebných pro uskladnění a využití elektrické energie.The aim of this work is to design the optimal configuration of off-grid power system or energy self-sufficient house. The introduction describes the basic elements of off-grid power system. Following is a description of own consumption configuration and it is analysis by measurement. From the results of measurement were drafted a proposal for the production of electrical energy using two independent sources, storage in batteries and designing all components for use of this system in practice, ie. the components needed for the storage and use of electric power.410 - Katedra elektroenergetikyvelmi dobř

Requirements specification for nickel cadmium battery expert system

The requirements for performance, design, test, and qualification of a computer program identified as NICBES, Nickel Cadmium Battery Expert System, is established. The specific spacecraft power system configuration selected was the Hubble Space Telescope (HST) Electrical Power System (EPS) Testbed. Power for the HST comes from a system of 13 Solar Panel Arrays (SPAs) linked to 6 Nickel Cadmium Batteries which are connected to 3 Busses. An expert system, NICBES, will be developed at Martin Marietta Aerospace to recognize a testbed anomaly, identify the malfunctioning component and recommend a course of action. Besides fault diagnosis, NICBES will be able to evaluate battery status, give advice on battery status and provide decision support for the operator. These requirements are detailed

Inertial Energy Storage for Spacecraft

The feasibility of inertial energy storage in a spacecraft power system is evaluated on the basis of a conceptual integrated design that encompasses a composite rotor, magnetic suspension and a permanent magnet (PM) motor/generator for a 3-kW orbital average payload at a bus distribution voltage of 250 volts dc. The conceptual design, is referred to as a Mechanical Capacitor. The baseline power system configuration selected is a series system employing peak-power-tracking for a Low Earth-Orbiting application. Power processing, required in the motor/generator, provides potential alternative that can only be achieved in systems with electrochemical energy storage by the addition of power processing components. One such alternative configuration provides for peak-power-tracking of the solar array and still maintains a regulated bus, without the expense of additional power processing components. Precise speed control of the two counterrotating wheels is required to reduce interaction with the attitude control system (ACS) or alternatively, used to perform attitude control functions

POWER SYSTEM CONFIGURATION, SHORT CffiCUIT ANALYSIS AND MOTOR STARTING STUDY OF AN OFFSHORE PLATFORM

An offshore oil platform can be defined as a large structure used to house workers and machinery needed to drill and then to produce oil and natural gas wells in the ocean. Platform usually consists of few modules such as drilling module, power generation module, gas lift module and etc. Normally, an oil platform consists of a central processing platform and few satellite platforms. This document defines the simulation for power system of an offshore platform. The study will be done based on Mel or Lahor Tangga Barat gas field, ML TTB platform. Offshore structures and installation design requires highest consideration because any disruption may jeopardize safety of personnel and can cause equipment failure which will cause a lot of money and maintenance. This document outlines the factors needed to be considered in preparing a power system, equipment sizing and configuration, short circuit analysis and also motor starting study. The simulation will be done using electrical power transmission and distribution system software called EDSA

Power system configuration study and reliability analysis Quarterly progress report, 7 Jan. - 6 Apr. 1967

Spacecraft power supply system and component reliability, efficiency, weight factors, and electromagnetic compatibilit

Preliminary survey of 21st century civil mission applications of space nuclear power

The purpose was to collect and categorize a forecast of civilian space missions and their power requirements, and to assess the suitability of an SP-100 class space reactor power system to those missions. A wide variety of missions were selected for examination. The applicability of an SP-100 type of nuclear power system was assessed for each of the selected missions; a strawman nuclear power system configuration was drawn up for each mission. The main conclusions are as follows: (1) Space nuclear power in the 50 kW sub e plus range can enhance or enable a wide variety of ambitious civil space mission; (2) Safety issues require additional analyses for some applications; (3) Safe space nuclear reactor disposal is an issue for some applications; (4) The current baseline SP-100 conical radiator configuration is not applicable in all cases; (5) Several applications will require shielding greater than that provided by the baseline shadow-shield; and (6) Long duration, continuous operation, high reliability missions may exceed the currently designed SP-100 lifetime capabilities

Project Based Learning Using Power System Training Device

: For an electrical engineer, training of power system configuration and operation is an essential problem. This paper proposes new training device which consists of separated circuit blocks (module). For example, induction generator, inverter, capacitor, measurement, are used. The trainee selects and assembles them to build a circuit then easy to conduct an experiment. This methodology is effective for group work so as it may be used for PBL (Project Based Learning) program. The concept and required skill to build this device are introduced in this paper

Grid impedance estimation for islanding detection and adaptive control of converters

The grid impedance is time varying due to the changing structure of the power system configuration and it can have a considerable influence on the control and stability of grid connected converters. This paper presents an online grid impedance estimation method using the output switching current ripple of a SVPWM based grid connected converter. The proposed impedance estimation method is derived from the discretised system model using two consecutive samples within the switching period. The estimated impedance is used for islanding detection and online current controller parameter adaptation. Theoretical analysis and MATLAB simulation results are presented to verify the proposed method. The effectiveness of the grid impedance estimator is validated using experimental results

Assessment of flywheel energy storage for spacecraft power systems

The feasibility of inertial energy storage in a spacecraft power system is evaluated on the basis of a conceptual integrated design that encompasses a composite rotor, magnetic suspension, and a permanent magnet (PM) motor/generator for a 3-kW orbital average payload at a bus distribution voltage of 250 volts dc. The conceptual design, which evolved at the Goddard Space Flight Center (GSFC), is referred to as a Mechanical Capacitor. The baseline power system configuration selected is a series system employing peak-power-tracking for a Low Earth-Orbiting application. Power processing, required in the motor/generator, provides a potential alternative configurations that can only be achieved in systems with electrochemical energy storage by the addition of power processing components. One such alternative configuration provides for peak-power-tracking of the solar array and still maintains a regulated bus, without the expense of additional power processing components. Precise speed control of the two counterrotating wheels is required to reduce interaction with the attitude control system (ACS) or alternatively, used to perform attitude control functions. Critical technologies identified are those pertaining to the energy storage element and are prioritized as composite wheel development, magnetic suspension, motor/generator, containment, and momentum control. Comparison with a 3-kW, 250-Vdc power system using either NiCd or NiH2 for energy storage results in a system in which inertial energy storage offers potential advantages in lifetime, operating temperature, voltage regulation, energy density, charge control, and overall system weight reduction