Implementation Of Dynamic Reconfiguration Research Articles

ПОВЫШЕНИЕ ПРОПУСКНОЙ СПОСОБНОСТИ РАСПРЕДЕЛИТЕЛЬНЫХ ЭЛЕКТРИЧЕСКИХ СЕТЕЙ С ВОЗОБНОВЛЯЕМЫМИ ИСТОЧНИКАМИ ЭНЕРГИИ ПУТЕМ ИХ РЕКОНФИГУРАЦИИ

Актуальность исследования обусловлена необходимостью разработки технических решений по повышению пропускной способности перспективных распределительных электрических сетей железных дорог с возобновляемыми источниками энергии в темпе процессов изменения спроса на электроэнергию. Цель: повышение пропускной способности перспективных распределительных электрических сетей железных дорог с возобновляемыми источниками энергии путем оптимальной реконфигурации электрических схем. Объекты: распределительные электрические сети, источники распределенной генерации активной и реактивной мощности, методы оптимизации для решения задач в электроэнергетике, повышение пропускной способности электрической сети. Методы: оптимизационная задача решалась методом ветвей и границ, имитационное моделирование режимов электрических сетей выполнялось в Matlab Simulink. Результаты. Разработан алгоритм реконфигурации электрической сети для повышения ее пропускной способности на основе решения задач оптимизации нормальных режимов (статическая реконфигурация) и минимизации потребления электроэнергии без расчета установившихся режимов в темпе процессов изменения спроса на электроэнергию (динамическая реконфигурация). Для обеспечения допустимости режимов распределительных электрических сетей предложены подходы к управлению предложением активных (на базе возобновляемых источников) и реактивных мощностей и спросом активных потребителей. Представлены результаты реализации динамической реконфигурации для тестовой электрической схемы без учета управления предложением мощности и спросом активных потребителей, свидетельствующие об обоснованности предлагаемых подходов к повышению пропускной способности электрической сети.

Reconfiguration of intelligent electrical distribution networks of railways

The Digitalization of the power supply system and the introduction of sources of distributed generation based on renewable energy create new conditions for improving the efficiency of transport and distribution of electric energy. In normal operation, the 35/10 (6) kV distribution electric networks of railways have an open-ended structure and are partitioned in such a way as to be able to connect a group of substations to another power source in emergency or repair modes. Existing technologies for managing modes in these electrical networks do not imply the possibility of changing their topology to ensure the tasks of reducing overload and electricity losses in the pace of processes of change in demand for electricity in normal modes. As a rule, at present, the task of reconfiguring the electrical network arises when normal conditions are restored after accidents, when lines are overloaded, and if necessary, electrical equipment needs to be repaired according to the n-1 criterion, while optimizing the modes. The most important task of increasing the transmission capacity of distribution grids can be solved by reconfiguring them at the pace of changing the demand for electricity in normal conditions, without resorting to expensive reconstruction and increasing the installed capacity of electrical installations and lines. An algorithm for reconfiguring the electrical network has been developed to increase its capacity based on solving problems of optimizing normal modes (static reconfiguration) and minimizing power consumption without calculating steady-state modes in the pace of electricity demand changes (dynamic reconfiguration).To ensure the admissibility of the modes of distribution electric networks, approaches to managing the supply of active (based on renewable sources) and reactive capacities and the demand of active consumers have been proposed. There are the results of the implementation of dynamic reconfiguration for the test circuitry without taking into account the power supply and demand management of active consumers, indicating the validity of the proposed approaches to improving the capacity of the electrical network

Remote Monitoring and Reconfiguration of Environment and Structural Health Using Wireless Sensor Networks

In the era of Internet of Things, there has been an increasing interest in the adoption of emerging sensing technologies in the real-time applications such as Structural Health, environmental and Traffic Monitoring Systems. The wireless monitoring is gaining popularity as there is no wiring is required between the sensors and data acquisition systems. Recent improvements in GSM and micro controller technologies have led to the development of various Structural Health Monitoring (SHM) systems. The SHM should observe the context and provide reliable information about the integrity of the structure. There is a need for an embedded system with dynamic reconfiguration mechanism which can adapt itself to the unstable and ever changing environments of structural and traffic monitoring. The implementation of dynamic reconfiguration is still challenging for real time embedded system control software. The proposed framework should also support the combined deployment of two heterogeneous applications on the same WSN. The fundamental aim of this paper is to develop a real-time embedded system, which provides flexible and robust mechanism for monitoring and reconfiguration of environment and SHM.

Application based on dynamic reconfiguration of field-programmable gate arrays: JPEG 2000 arithmetic decoder

This paper describes the implementation of a part of the JPEG 2000 algorithm (MQ decoder and arithmetic decoder) on a field-programmable gate array (FPGA) board by using dynamic reconfiguration. A comparison between static and dynamic reconfiguration is presented, and new analysis criteria (spatiotemporal efficiency, logic cost, and performance time) have been defined. The MQ decoder and arithmetic decoder are attractive for dynamic reconfiguration implementation in applications without parallel processing. This implementation is done on an architecture designed to study the dynamic reconfiguration of FPGAs: the ARDOISE architecture. The obtained implementation, based on four partial configurations of the arithmetic decoder, allows one to reduce the number of logic cells significantly (by 57%) in comparison with static implementation.

A dynamic reconfiguration scheme for mega bit Static Random Access Memories

The objective of this paper is to present a novel dynamic reconfiguration scheme for mega bit Static Random Access Memories (SRAMs). Most of the conventional reconfiguration methods are implemented using two-way switching elements. The proposed scheme is based on on-chip word failure detection and reconfiguration to spare word cell using multi-valued logic elements. The physical concept of the dynamic reconfiguration scheme and implementation details are discussed. Based on the SRAM dynamic reconfiguration implementation a reliability model is develoed. Dyanamic reconfiguration scheme reliability comparisons with other existing methods are presented. The advantages of the proposed dyanamic reconfiguration scheme are highlighted.