• Title/Summary/Keyword: Wireless Distribution System

Search Result 285, Processing Time 0.034 seconds

Performance Improvement of Air Conditioner Network System using Wireless Sensors Through System Performance Index and Dynamic Power Distribution Control (시스템 성능 지수 및 동적 전력분산 제어를 통한 무선센서를 이용한 에어컨 네트워크 시스템의 성능 개선)

  • Choi, Ho-seek;Kwon, Woo-hyen;Yoon, Byung-keun
    • Journal of Sensor Science and Technology
    • /
    • v.28 no.1
    • /
    • pp.64-70
    • /
    • 2019
  • Wireless sensors have been developed in numerous ways for enhancing the convenience of installation, management and maintenance of sensors. Energy harvesting wireless sensors, which can collect energy from the external environment for permanent usage without the need of recharging and exchanging batteries, have been developed and employed used in Internet of Things and at various industrial sites. Energy harvesting wireless sensors are significantly affected by the sensor lifespan to sudden variation in the external environment. Furthermore, reduction in the sensor operating timespan can greatly affect the characteristics of the devices connected through a network. In this paper, a system performance index is proposed that can comprehensively evaluate the lifespan of a solar cell wireless sensor, determine the characteristics of devices connected to the associated network, and recommend dynamic power distribution control for improving the system performance index. Improvement in the system performance index was verified by applying the proposed dynamic power distribution control to an air conditioner network system using a solar cell wireless sensor. Obtained results corroborate that the dynamic power distribution control can extend the lifespan of the incorporated wireless sensor and reduce the air conditioner's power consumption.

Development of the Remote Monitoring System for Leakage Current Using Wireless Communication (무선통신을 이용한 누설전류 원격 감시시스템의 개발)

  • Park, Sung-Won;Park, Ji-Ho;Kim, Dong-Wan
    • The Transactions of the Korean Institute of Electrical Engineers P
    • /
    • v.57 no.4
    • /
    • pp.349-355
    • /
    • 2008
  • In this paper, a wireless remote monitoring system for leakage current of distribution board is developed. In the developed system, signals of the leakage current of distribution board are transmitted to a monitoring system using wireless communication. The developed system is consisted of a comparative module, control module, a wireless communication module, and hand held terminal. The developed system has any facilities which can check a leakage current with real time, send to the user this fact using a wireless remote interface method. And also developed system can take precaution for an accident by leakage current.

Multi-interface Wireless Mesh Network Testbed using Wireless Distribution System (무선 분산 시스템을 이용한 멀티 인터페이스 무선 메쉬 네트워크 테스트베드)

  • Yoon, Mi-Kyung;Yang, Seung-Chur;Kim, Jong-Deok
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.13 no.6
    • /
    • pp.1077-1082
    • /
    • 2009
  • Wireless Mesh Network(WMN) is wireless backbone networks technique which has ease of network configuration and cost of advantage. Recently, WNM released a new product, but most of existing research and technology analysis the performance through the simulation. This paper build the wireless mesh network testbed for actual situation. Testbed supports multi-channel multi-interface using bridge, the Wireless Distribution System and dynamic location-based routing protocol. This routing protocol strongly design against wireless interference using metric for link channel change and real distance. Then, the address of mesh clients assigned by the centralized address management server. Mesh clients is designed and implemented to manage network through Simple Network Management Protocol.

Implementation of Wireless Distribution Automation System using Binary CDMA Technology (바이너리 CDMA 기술을 이용한 무선 배전 자동화 시스템의 구현)

  • Kwon, Tai-Kil;Cho, Jin-Woong;Hong, Dae-Ki
    • The Transactions of the Korean Institute of Electrical Engineers P
    • /
    • v.61 no.4
    • /
    • pp.239-244
    • /
    • 2012
  • In this paper, we first introduce our own binary CDMA technology. Then we propose a wireless distribution automation system using the binary CDMA technology. The major research items are the binary CDMA distribution automation system, piconet configuration for remote control and monitoring, scheduling for the transmission and reception of data, and ways of applying encryption to protect wireless packet. To verify the possibility of applying wireless transmission to the distribution automation system, we experiment the implemented system in terms of the transmission rate by applying it to a real-world environment.

Multi-interface Wireless Mesh Network Testbed using Wireless Distribution System (무선 분산 시스템을 이용한 멀티 인터페이스 무선 메쉬 네트워크 테스트베드)

  • Yoon, Mi-kyung;Yang, Seung-chur;Kim, Jong-deok
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2009.05a
    • /
    • pp.87-90
    • /
    • 2009
  • Wireless Mesh Network(WMN) is wireless backbone networks technique which has ease of network configuration and cost of advantage. Recently, WNM released a new product, but most of existing research and technology analysis the performance through the simulation. This paper build the wireless mesh network testbed for actual situation. Testbed supports multi-channel multi-interface using bridge, the Wireless Distribution System and dynamic location-based routing protocol. This routing protocol strongly design against wireless interference using metric for link channel change and real distance. Then, the address of mesh clients assigned by the centralized address management server. Mesh clients is designed and implemented to manage network through Simple Network Management Protocol.

  • PDF

Development of ZigBee Wireless Communication System for Remote Diagnosis in Distribution Power Lines (배전선로 원격 진단을 위한 ZigBee 무선통신 시스템 개발)

  • Lee, Kyeong-Seob;Chung, Dong-Hyun
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.28 no.9
    • /
    • pp.602-606
    • /
    • 2015
  • This paper presents a ZigBee wireless communication system for remote diagnosis in overhead distribution power lines. The system is divided in three parts in the functional aspect - a host computer module, a remote controller module and a diagnostic system module. The host computer module designed as USB interface transmits control signals and receive data measured by sensor. The remote controller module operates the diagnostic system. Diagnostic system module communicates with internal main controller and host computer USB. Multiple communication channel is adopted for simultaneous operations of several diagnostic system. Dedicated protocol for each module is developed. The system is designed with a focus on low cost and small size suitable for lightweight and small diagnostic system.

Control of Power Distribution for Multiple Receivers in SIMO Wireless Power Transfer System

  • Kim, Gunyoung;Boo, Seunghyun;Kim, Sanghoek;Lee, Bomson
    • Journal of electromagnetic engineering and science
    • /
    • v.18 no.4
    • /
    • pp.221-230
    • /
    • 2018
  • A method to control the power distribution among receivers by the load values in a single-input, multiple-output (SIMO) wireless power transfer (WPT) system is investigated. We first derive the value of loads to maximize total efficiency. Next, a simple, but effective analytical formula of the load condition for the desired power distribution ratio is presented. The derived load solutions are simply given by system figure of merits and desired power ratios. The formula is validated with many numerical examples via electromagnetic simulations. We demonstrate that with the choice of loads from this simple formula, the power can be conveniently and accurately distributed among receivers for most practical requirements in SIMO WPT systems.

Development of Wireless Monitoring System for Distribution Transformer (배전용 변압기의 무선 부하감시 시스템 개발)

  • Jung, Joon-Hong;Kang, Tae-Goo;Kim, Il-Kyung
    • Proceedings of the KIEE Conference
    • /
    • 2008.07a
    • /
    • pp.414-415
    • /
    • 2008
  • In this paper, we consider the development methodology of wireless monitoring system for a distribution transformer. The master/ slave devices are installed in the power distribution feeder and measure the current state of pole or ground transformers. After measuring, the devices send the measurement data to operating room through the wireless network such as RF and CDMA so that the power distribution supervisor can prevent a distribution transformer damaging caused by overloads and imbalance of loads.

  • PDF

Trend for Managing Electrical Distribution Equipments Using a Wireless Sensors (배전 설비의 무선 통신을 이용한 배전 설비의 신뢰성 향상 기술 동향)

  • Lee, Ju-Hong;Yun, Ju-Ho;Choi, Yong-Sung;Lee, Kyung-Sup
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • 2007.06a
    • /
    • pp.543-544
    • /
    • 2007
  • This paper introduce methods and analysis of a simple wireless sensor concept for detecting and locating faults as well as for load monitoring are presented. The concept is based on distributed wireless sensors that are attached to the incoming and outgoing power lines of secondary substations. A sensor measures only phase current characteristics of the wire it is attached to, is not synchronized to other sensors and does not need configuration of triggering levels. The main novelty of the concept is in detecting and locating faults by combining power distribution network characteristics on system level with low power sampling methods for individual sensors. This concept enables the sensor design to be simple, energy efficient and thus applicable in new installations and for retrofit purposes in both overhead and underground electrical distribution systems.

  • PDF

Precoder Distribution and Adaptive Codebook in Wideband Precoding

  • Long, Hang;Kim, Kyeong Jin;Xiang, Wei;Wang, Jing;Liu, Yuanan;Wang, Wenbo
    • ETRI Journal
    • /
    • v.34 no.5
    • /
    • pp.655-665
    • /
    • 2012
  • Based on wideband precoding (WBP) in the multiple-input multiple-output orthogonal frequency division multiplexing system, an adaptive nonuniform codebook is presented in this paper. The relationship between the precoder distribution and spatial correlation is analyzed at first. A closed-form expression based on overlapped isosceles triangles is proposed as an approximation of the precoder distribution. Then, the adaptive codebook design is derived with the approximate distribution to minimize quantization errors. The capacity and bit error rate performance demonstrate that the adaptive codebook with WBP outperforms the conventional fixed uniform codebook.