• Proceedings of the KIEE Conference
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• 1987.11a
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• pp.321-324
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• 1987

The development of SCADA system program has been studied for the purpose of upgrading its function and increasing the effect of system application. The results of this project are divided into 3 steps, Analysis of the system function and operating system, Improvement of programs for effective alarm/logging system, Development of programs for the statistical analysis of power system operation.

• Proceedings of the KIEE Conference
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• 1992.07a
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• pp.130-132
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• 1992

Many different industries use Supervisory Control and Data Acqisition/Energy Management Systems (Scada/EMS) to guide a wide range of operations and processes. This paper provides an overview of the functions of Scada/EMS and the fundamentals of operation of Scada/EMS. The paper concludes with the current trends toward open systems, distributed architecture, improved man-machine interface(MMl), advanced applications, artificial intelligence(AI), distribution automation, smarter remote terminal units(RTUs)and expended system scope.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.62 no.3
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• pp.332-341
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• 2013

SCADA RTU is a remote control unit equipped in substations for automatic operation of a power system. The RTU monitors and measures the operation status of remote substations to transmits the signals to upper SCADA system and receives control command signals from dispatch center to actuate corresponding apparatus. The RTU receives the standard time from GPS receiver to synchronize the times for all devices and acquires the status event of power apparatus using DIM. Without the time synchronization between GPS and RTU, stable operation of the power system and accurate analysis of the system fault are impossible due to the time error of SOE. In this paper, a test is performed to identify if the operation time of SCADA RTU DIM coincides with the standard time. And we tried to find the reason of error, to minimize the time discrepancy. Through this study, RTU operation time could be synchronized with the standard time within 10[ms] to improve the reliability of SOE data.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.1
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• pp.151-158
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• 2010

The industrial foundation of the inside and outside of a country has brought significant damages due to attacks from hackers. Especially, if the national primary core infrastructures(like electric power, dam, railroad, atomic energy, etc.) has been significantly damaged, it can be directly linked not only to economic problems but also to people's lives. These national primary core infrastructures usually constitute SCADA system using Modbus RS486 communication. Because of this characteristic, SCADA system has RTU master and slave linked to RJ11 cables to directly pass commands. RJ11 is possible in data spoofing using physical connection because the transmission range of RJ11 has a wide bandwidth(almost 1km). Hence, this paper designed an idle-time measurement system for SCADA system for emerging security improvement in the national primary core infrastructures.

• Proceedings of the KIEE Conference
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• summer
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• pp.85-87
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• 2004

Supervisory control and data acquisition (SCADA) systems are essential parts of power system which employ a wide range of computers and communication technologies. The traditional SCADA system is mainly for information exchange in only one company, and the information is provided only to the operator or administrator. But in the deregulated environment, we need much more information, which can be exchanged among different companies. With the rapid development of internet, we can use it to access information easily. This paper proposes web technologies to be applied in power system in order to display some important information through accessing data from database, and to realize the real time control of the substation. The functions of SCADA system will be implemented by a set of Web-based components. The monitoring and control of standard 154[kV] substation model is already realized in the laboratory test. The Web-based SCADA system is able to provide sufficient information and control for pow or system through an efficient and economical way.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 1993.10a
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• pp.51-54
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• 1993

In this paper, it is proposed the the SCADA(Supervisory control and Data Acquisition) system in Apartment complex. The proposed SCADA system make use of the computer CRT(Cathod RAy Tube), which automatically observe the Electrical Facility, Elvator Facility, Fire Alarm Facility and process in the real-time data. In order to improve the hardware performance and the information process, the SCADA system composed of master-slave topology and decentralized the supervisory Facility. This system is expected the retrenchment of construction expenditure and the level-up of supervisory execution.

• 제어로봇시스템학회:학술대회논문집
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• 1991.10a
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• pp.1098-1103
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• 1991

This paper discusses the training simulator designed to improve the skills of operators who handle the SCADA System of KEPCO. The system is composed of the simulation subsystem and database, and implemented on the 386 based P.C, It is linked to existing SCADA system (HARRIS computer and TADCOM) to work realistically for the situation of accidents and corresponding actions.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.3
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• pp.427-438
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• 2012

The SCADA(Supervisory Control and Data Acquisition) systems are used to control some critical national infrastructures such as electricity, gas, and water distribution systems. Recently, there are many researches on key management scheme for secure communication due to change to the open network environment. We propose a new key management method which is established on ID-based cryptosystem using pairing on MTU(Master Terminal Unit), Sub-MTU, and RTU(Remote Terminal Unit). Furthermore, we present a redistribution protocol of private key of each device and a system recovery protocol as a countermeasure of exposure of KMS(Key Management System) master key which is occurred by some unexpected accidents or malicious attacks.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.4
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• pp.25-32
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• 2010

The Supervisory Control and Data Acquisition Systems (SCADA) system provides monitoring, data gathering, analysis, and control of the equipment used to manage most infrastructure. The SCADA Network is implemented in a various manner for larger utilities, and multiple types of protocol and communication interfaces are used to network the control center to remote sites. The existing SCADA equipment and protocols were designed and implemented with availability and efficiency, and as a result security was not a consideration. So, performance, reliability, flexibility and safety of SCADA systems are robust, while the security of these systems is often weak. This makes some SCADA networks potentially vulnerable to disruption of service, process redirection, or manipulation of operational data that could result in public safety concerns and/or serious disruptions to the infrastructure. To reduce the risks, therefore, there is a need to have a security device such as cipher devices or cryptographic modules for security solutions. In this paper we develop an embedded cipher device for the SCADA equipment. This paper presents a cipher device designed to improve the security of its networks, especially in the serial communication.

• Proceedings of the KIEE Conference
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• 2007.11b
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• pp.171-172
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• 2007

우리나라 전력계통 네트워크는 SCADA를 통해 데이터를 취득하고 있다. 초창기 SCADA를 도입할 당시에는 이 시스템이 성능과 기능면에서 그 당시의 최신기술이며 유일한 네트워크 모델이었다. 특히 핵심적인 부분에서는 국내 순수 기술이 아닌 외국 제품이 적용되었다. 그러나 근래에 기술동향은 정보통신의 점진석인 발달과 하드웨어의 성능 향상 등을 통해 동일조건에서 동인 시스템을 구축할 경우 이전과 비교해 볼 때 월등한 효율성과 경제성을 갖출 수 있다. 특히나 전력계통의 경우 신뢰성을 기반으로 한 국가 기간산업이므로 이러한 기술을 적용한 파급효과는 보수적인 면이 있다. 따라서 본 논문에서는 이런 특성을 고려하여 현재의 SCADA를 분석해보고 애플리케이션을 추가할 경우에 어떻게 설계해야 할지에 대해 살펴보고자 한다.