• Journal of Communications and Networks
• /
• 제14권6호
• /
• pp.597-605
• /
• 2012

With the smart grid coming near, wide-area supervisory control and data acquisition (SCADA) becomes more and more important. However, traditional SCADA systems are not suitable for the openness and distribution requirements of smart grid. Distributed SCADA services should be openly composable and secure. Event-driven methodology makes service collaborations more real-time and flexible because of the space, time and control decoupling of event producer and consumer, which gives us an appropriate foundation. Our SCADA services are constructed and integrated based on distributed events in this paper. Unfortunately, an event-driven SCADA service does not know who consumes its events, and consumers do not know who produces the events either. In this environment, a SCADA service cannot directly control access because of anonymous and multicast interactions. In this paper, a distributed security framework is proposed to protect not only service operations but also data contents in smart grid environments. Finally, a security implementation scheme is given for SCADA services.

• 조명전기설비학회논문지
• /
• 제21권9호
• /
• pp.95-100
• /
• 2007

The importance of communication security is increased in the power industry. The representative communication network of power industry is the SCADA(Supervisory Control and Data Acquisition) systems. The SCADA system has been used for remote measurement and control in the power industry. Recently, many studies of SCADA network security have been carried out around the world. In this paper, we introduce recent security issues in the SCADA network and propose the application of a symmetric encryption method to the Korea SCADA network.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 1993년도 추계학술발표회논문집
• /
• pp.51-54
• /
• 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.

• 조명전기설비학회논문지
• /
• 제23권11호
• /
• pp.34-43
• /
• 2009

SCADA (Supervisory Control and Data Acquisition) system has been used for remote measurement and control on the critical infrastructures as well as modem industrial facilities. As cyber attacks increase on communication networks, SCADA network has been also exposed to cyber security problems. Especially, SCADA systems of energy industry such as electric power, gas and oil are vulnerable to targeted cyber attack and terrorism Recently, many research efforts to solve the problems have made progress on SCADA network security. In this paper, flexible key distribution concept is proposed for improving the security of SCADA network using Multiagent System (MAS).

• 전기학회논문지
• /
• 제65권5호
• /
• pp.811-818
• /
• 2016

This paper suggests a structure of power control system in floating wave-offshore wind hybrid power generation system. We have developed an unified SCADA(Supervisory Control and Data Acquisition) system which can be used to monitor and control PCS(Power Conversion System) based on IEC61850. The SCADA system is essential to perform the algorithm like proportional distribution and data acquisition, monitoring, active power, reactive power control in hybrid power generation system. IEC61850 is an international standard for electrical substation automation systems. It was made to compensate the limitations of the legacy industrial protocols such as Modbus. In order to test the proposed SCADA system and algorithm, we have developed the wind-wave simulator based Modbus. We have designed a protocol conversion device based on real-time Linux for the communication between Modbus and IEC61850. In this study, SCADA system consists of four 3MW class wind turbines and twenty-four 100kW class wave force generator.

• 디지털산업정보학회논문지
• /
• 제5권2호
• /
• pp.123-131
• /
• 2009

Process Control Systems (PCSs) or Supervisory Control and Data Acquisition (SCADA) systems have recently been added to the already wide collection of wireless sensor networks applications. The PCS/SCADA environment is somewhat more amenable to the use of heavy cryptographic mechanisms such as public key cryptography than other sensor application environments. The sensor nodes in the environment, however, are still open to devastating attacks such as node capture, which makes designing a secure key management challenging. Recently, Nilsson et al. proposed a key management scheme for PCS/SCADA, which was claimed to provide forward and backward secrecies. In this paper, we define four different types of adversaries or attackers in wireless sensor network environments in order to facilitate the evaluation of protocol strength. We then analyze Nilsson et al. 's protocol and show that it does not provide forward and backward secrecies against any type of adversary model.

• 조명전기설비학회논문지
• /
• 제24권4호
• /
• pp.50-56
• /
• 2010

집중 원격감시 제어 또는 감시제어 데이터 수집 시스템인 SCADA(Supervisory Control And Data Acquisition) 는 기존의 국지적인 산업용 네트워크 기반의 제어시스템이 정보통신 기술의 발전으로 광역화되면서 전력, 가스, 상하수도, 교통시스템 등 주요 기반시설에 적용되어 분산제어와 공정제어 시스템으로 사용되고 있다. SCADA 시스템의 중요성과 사고시 미치는 파급효과를 고려하여 구성 장치 및 통신 설비들에 대한 사이버 보안(cyber security) 인식이 점차 높아지고 있으며, SCADA 시스템의 취약성 분석과 보안성 확보에 대한 연구가 이루어지고 있다. 본 논문에서는 현장에서 운용중인 상용 SCADA 시스템의 계층구조와 통신 사양 및 규약을 고려하여 보안성 평가를 위한 테스트베드를 제안하고자 한다. 특히 계측 제어 명령을 수행하는 RTU, IED와 같은 단말 장치의 직렬통신 구간에서 보안성 평가를 수행하기 위한 물리적 접속과 평가 절차를 제시하였다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
• /
• 제55권9호
• /
• pp.485-490
• /
• 2006

According to the computerization of railway signaling systems, the interface link between the signaling systems has been replaced by the digital communication channel. At the same time, the importance of the communication link is more pronounced than before. In this paper, new Network-based protocol between railway signaling and SCADA (Supervisory Control and Data Acquisition system) has designed and the overview of designed protocol is briefly represented. And also this paper addresses analysis of newly designed train control systems. Fame error rates of the data transmissions are calculated and compared for the two cases that the CTC (Centralized Traffic Control)/SCADA has an extra data transmission error control (CRC16) besides the inherent error control of the Ethernet and that the CTC/SCADA has no extra data transmission error control. With simulation results it has been verified that the additional error control code contributes to lowering the frame error rate. It will be expected to increase the safety, reliability and efficiency of maintenance of the signaling systems by using the designed protocol for railway signaling system.

• 전기학회논문지P
• /
• 제53권2호
• /
• pp.89-93
• /
• 2004

Supervisory Control And Data Acquisition(SCADA) of electric power system refersto the system that displays, monitors and executes the control commands for remote electric power system. KNR's existing electric power control system is built on UNIX platform such that it costs more for system construction, and people with UNIX skills can only be an operator who controls and manages the system. Moreover, since the system is mainly operated in local offices, system operators must communicate with local operators to investigate the cause of the accident and react the accident every time the system fails. As a new integrated SCADA system is constructed, establishment of small-unit electric power control system, that alters local electric power control system in designated stations, is required. In this study, the electric power control system, which accommodates all functions of UNIX-based SCADA system and facilitates operation and even maintenance for local operators, is to be developed. In order to develop small-unit electric power control system, the industrial automation program, "Cimon", is used. The small-unit electric power control system that accommodatesRTU and newly installed electronic switchboard is being developed and tested at Chulam station of KNR.

• 전기전자학회논문지
• /
• 제13권3호
• /
• pp.87-94
• /
• 2009

TETRA(TErrestrial Trunked RAdio)는 국내 전력IT무선기간망에 적용된 ETSI(European Telecommunications Standards Institute)가 정한 디지털 주파수공용통신(TRS, Trunked Radio System) 기술로서 공중망 및 기간망에 적용되고 있는 무선통신시스템이다. IEC 61850은 SCADA(Supervisory Control And Data Acquisition) 시스템에서 SAS(Substation Automation System)를 위해 제안된 프로토콜이다. 본 논문에서는 리눅스 운영체제 기반의 IEC 61850 Server와 Client Simulator를 사용하였다. 또한 IEC 61850 Server Simulator와 Client Simulator 간의 TCP/IP 기반의 통신을 TETRA Packet Data Service 기반의 통신으로 변환하는 다기능 게이트웨이를 개발하여 TETRA 기반 IEC 61850 SCADA 시스템을 구축하였다.