• Title, Summary, Keyword: Wide-area monitoring

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Development of Dynamic Frequency Monitoring Software for Wide-Area Protection Relaying Intelligence (광역 보호계전 지능화를 위한 동적 주파수 모니터링 S/W 개발)

  • Kim, Yoon-Sang;Park, Chul-Won
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.61 no.4
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    • pp.174-179
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    • 2012
  • The social and economic level of damages might be highly increased in the case of wide-area black-outages, because of heavy dependence of electricity. Therefore, the development of a wide-area protection relay intelligence techniques is required to prevent massive power outages and minimize the impact strength at failure. The frequency monitoring and prediction for wide-area protection relaying intelligence has been considered as an important technology. In this paper, a network-based frequency monitoring system developed for wide-area protection relay intelligence is presented. In addition, conventional techniques for frequency estimation are compared, and a method for advanced frequency estimation and measurement to improve the precision is proposed. Finally, an integrated monitoring system called K-FNET(Korea-Frequency Monitoring Network) is implemented based on the GPS and various energy monitoring cases are studied.

Measurement and Simulation of Wide-area Frequency in US Eastern Interconnected Power System

  • Kook, Kyung Soo;Liu, Yilu
    • Journal of Electrical Engineering and Technology
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    • v.8 no.3
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    • pp.472-477
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    • 2013
  • An internet-based, real-time GPS synchronized wide-area power system frequency monitoring network(FNET) has been monitoring wide-area power system frequency in continuous time in the United States. This paper analyzes the FNET measurement to the verified disturbances in the US eastern interconnected power system and simulates it using the dynamic system model. By comparing the frequency measurements with its simulation results to the same disturbances in detail, this paper finds that the sequence of monitoring points to detect the frequency fluctuation caused by the disturbances is matched well in the measured data and the simulation results. The similarity comparison index is also proposed to quantify the similarity of the compared cases. The dynamic model based simulation result is expected to compensate for the lack of FNET measurement in its applications.

Hierarchical Infra Design Strategy for WAMAC System based on Synchro-Phasor Data (WAMAC 시스템을 위한 계층적 인프라 설계 기법)

  • Kim, Ji-Young;Kim, Jin-Hwan;Kim, Sang-Tae;Cho, Jun-Hee;Choi, Mi-Hwa
    • Proceedings of the KIEE Conference
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    • pp.302-303
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    • 2011
  • Smart WAMAC (Wide Area Monitoring And Control) System, which supplements control function with the function of WAMS(Wide Area Monitoring System), is an intelligent system not only monitoring the wide area but controlling the power equipment according to defined procedure. This paper presents WAMAC system architecture for hierarchical Infra and considerations to design and implement.

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Development of "K-WAMS" Wide Area Monitoring System based on Synchro-Phasor (시간 동기 데이터를 이용한 광역계통 감시시스템 "K-WAMS"구현)

  • Kim, Sang-Tae;Kim, Ji-Young;Lee, Dong-Chul;Song, Wan-Suk;Jang, Su-Hyung;Kim, Young-Don
    • Proceedings of the KIEE Conference
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    • pp.44-46
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    • 2008
  • K-WAMS based on i-PIU as a synchro-phasor data acquisition device using GPS can treat a monitoring and evaluation of wide area power system to detect a various symptoms of wide area disturbances and prevent large blackout. This paper introduced the development of K-WAMS such like WAMS(Wide Area Monitoring System).

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IEC 61970 CIM based Study on the application of model for Wide Area Monitoring And Control System (IEC 61970 CIM을 기반으로 한 Wide Area Monitoring And Control system 모델 적용 연구)

  • Cho, Jun-Hee;Oh, Young-Suk;Choi, Mi-Hwa;Shin, Seung-Hee;Kim, Ji-Young
    • Proceedings of the KIEE Conference
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    • pp.178-179
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    • 2011
  • The exchange of information with legacy systems is a main issue in the era of SMARTGRID. Because WAMAC(Wide Area Monitoring and Control) system has monitoring function, as well as control function, it is very necessary for WAMAC to exchange data and information with SCADA(Supervisory Control and Data Acquisition) / EMS(Energy Management System). IEC 61970 CIM(Common Information Model) is an abstract model that represents all the major objects in an electric utility enterprise typically involved in utility operations. In this paper, a proposal that adopting CIM to WAMAC model be submitted so that the integration of various legacy system and application for itself be able to be flexible.

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A Framework for Wide-area Monitoring of Tree-related High Impedance Faults in Medium-voltage Networks

  • Bahador, Nooshin;Matinfar, Hamid Reza;Namdari, Farhad
    • Journal of Electrical Engineering and Technology
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    • v.13 no.1
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    • pp.1-10
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    • 2018
  • Wide-area monitoring of tree-related high impedance fault (THIF) efficiently contributes to increase reliability of large-scaled network, since the failure to early location of them may results in critical lines tripping and consequently large blackouts. In the first place, this wide-area monitoring of THIF requires managing the placement of sensors across large power grid network according to THIF detection objective. For this purpose, current paper presents a framework in which sensors are distributed according to a predetermined risk map. The proposed risk map determines the possibility of THIF occurrence on every branch in a power network, based on electrical conductivity of trees and their positions to power lines which extracted from spectral data. The obtained possibility value can be considered as a weight coefficient assigned to each branch in sensor placement problem. The next step after sensors deployment is to on-line monitor based on moving data window. In this on-line process, the received data window is evaluated for obtaining a correlation between low frequency and high frequency components of signal. If obtained correlation follows a specified pattern, received signal is considered as a THIF. Thereafter, if several faulted section candidates are found by deployed sensors, the most likely location is chosen from the list of candidates based on predetermined THIF risk map.

Design & Development of System Architecture for Wide Area Defense System (광역정전 Defense를 위한 System Architecture 설계 및 개발)

  • Kim, S.-Tae;Lee, Jeong-Hyun;Kim, Ji-Young;Lee, Dong-Chul;Moon, Young-Hwan;Kim, Tae-Hyun
    • Proceedings of the KIEE Conference
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    • pp.165-166
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    • 2006
  • Recently, after Wide Area Outage of the North-Eastern United States occurred, many countries started to be concerned about WAMS (Wide Area Monitoring System), and Korean power system also experienced Wide Area outage according to typhoon Mae-Mi, and Haenam-Jeju HVDC line fault. Since it is too difficult to detect a symptom based on SCADA or EMS, a defense system of electric power infrastructure has required. In this research, the designed and developed system processes the time synchronized real time power system information based on GPS and shows the 2D/3D monitoring viewer using the phasor data and the results of three algorithms.

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A Study on the Development of a Wide-Area Monitoring and Control System for Tug/barges

  • Moon, Serng-Bae;Kim, Bo-Kyung;Jeong, Tae-Gweon
    • Journal of Navigation and Port Research
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    • v.33 no.9
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    • pp.609-614
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    • 2009
  • The traffic of tug/barges which are carrying construction materials, large plants for harbor development, or offshore structures has recently increased in the coast of Korea. The west and south coast of Korea are always congested due to a lot of islands and traffic concentration. Specially tug/barges have higher probability of marine accidents due to their bad maneuverability than others. Considering the operational circumstance and maneuverability, this study was to develop a wide-area monitoring and control system for tug/barges in the coastal area of Korea. The system was made in the form of three program modules i.e. navigation analysis program module, monitoring and control program module, database module. And seven functions were programmed to monitor and control the tug/barges efficiently. These are ship information search, tug/barge information and track management, designated area and safe navigation zone management, fairway management, accident data management, warning of danger, safety information management.

Wide-area Frequency-based Tripped Generator Locating Method for Interconnected Power Systems

  • Kook, Kyung-Soo;Liu, Yilu
    • Journal of Electrical Engineering and Technology
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    • v.6 no.6
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    • pp.776-785
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    • 2011
  • Since the Internet-based real-time Global Positioning System(GPS) synchronized widearea power system frequency monitoring network (FNET) was proposed in 2001, it has been monitoring the power system frequency in interconnected United States power systems and numerous interesting behaviors have been observed, including frequency excursion propagation. We address the consistency of a frequency excursion detection order of frequency disturbance recorders in FNET in relation to the same generation trip, as well as the ability to recreate by power systems dynamic simulation. We also propose a new method, as an application of FNET measurement, to locate a tripped generator using power systems dynamic simulation and wide-area frequency measurement. The simulation database of all the possible trips of generators in the interconnected power systems is created using the off-line power systems dynamic simulation. When FNET detects a sudden drop in the monitoring frequency, which is most likely due to a generation trip in power systems, the proposed algorithm locates a tripped generator by finding the best matching case of the measured frequency excursion in the simulation database in terms of the frequency drop detection order and the time of monitoring points.

Real Time Wide Area Voltage Stability Index in the Korean Metropolitan Area

  • Han, Sang-Wook;Lee, Byong-Jun;Kim, Sang-Tae;Moon, Young-Hwan
    • Journal of Electrical Engineering and Technology
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    • v.4 no.4
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    • pp.451-456
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    • 2009
  • Through the development of phasor measurement units (PMU), various aspects of power system dynamic behavior could be monitored and diagnosed. Monitoring dynamic voltage stability has become one of the achievements we can obtain from PMUs. It is very important to select the most appropriate method for the Korea Electric Power Corporation (KEPCO) system since there are many voltage stability indices. In this paper, we propose an advanced WAVI (Wide Area Voltage Stability) that is well suited for the purposes of monitoring the dynamic voltage stability of KEPCO's PMU installation plan. The salient features of the proposed index are: i) it uses only PMU measurements without coupling with EMS data; ii) it is computationally unburdened and can be applied to real-time situations. The proposed index is applied to the KEPCO test system and the results show that it successfully predicts voltage instability through comparative studies.