Seoul Metro Joins the Green Approach

CASE HISTORY Inter Electric

Inter Electric Industry | Infrastructure

Seoul Metro joins the green approach

The SCADA Movicon.NExT by Progea has been chosen for the improvement of energy efficiency of the Seoul subway network in South Korea.

Inter Electric Co., Ltd. was founded in Seoul, South traffic. It includes 537.4 km of metro lines and is a Korea, in 1999. Initially, the company was specialized total of 1131.5 km long including suburban railways. in the integration of IEDs (intelligent electronic The Seoul metropolitan system is one of the most devices) mainly in the naval sector for customers used urban transport systems in the world, with such as Hyundai Heavy Industry in Seoul. The over eight million daily journeys. The network following introduction of SCADA and PLC / DCS serves Seoul, Incheon, Gyeonggi-do, the north (Distributed control systems) automation solutions in of Chungcheongnam-do and the western part of the chemical industry, oil & gas, power plants, water Gangwon-do. treatment, manufacturing, and transport sectors Over 70% of the total metro track is underground. have led to the constant growth of the company. The network, consisting of lines 1 to 9, serves Seoul Nowadays Inter Electric is further expanding its and its surroundings. Seoul Metro manages the lines products portfolio in energy and risk management for 1 through 8. The construction of the first metro line, civil and industrial electrical systems. Line 1, began in 1971 and was inaugurated in 1974. Among its various customers, Inter Electric boasts Following the construction of the first railway line, Seoul Metro, which is not only one of the most the Seoul Metropolitan Subway Corporation was representative public institutions in South Korea, as founded in 1981. it is the company that manages the metro network Beginning from the 1980s, the company managed the in the capital and surrounding areas, but also aims progressive construction of the various metro lines to develop urban transport and improving public from 2 to 8. well-being. The Seoul subway has 22 operating lines Today, Seoul Metro manages 277 subway stations, and 707 stations, including the Korail lines (Korea 80 substations, and 16 depots. To modernize Railroad Corporation - the most important South the management system of the railway lines and Korean railway company) and those for commuter constantly monitor electricity consumption by CASE HISTORY Inter Electric

collecting and analyzing consumer data, the Seoul The data aggregated and calculated using Pro. Metro addressed Inter Electric to provide it with a Energy is crossed with the historical data present in system for the management and control of the the customer database and, through the historical metro network. analysis objects present in Movicon.NExT, they are displayed on the energy dashboards developed in The application Movicon.NExT. In addition, the main Server allows The entire management system of the Seoul subway the visualization of energy dashboards on a PC lines consists of five servers and two PCs located in equipped with a 55 “ monitor and installed at the the general control room and the depots. entrance of the Electric Engineering Department The whole station monitoring system is made up room. The main PC-Server communication is of 945 energy meters units for measuring the guaranteed by the OPC UA protocol, made natively consumption of both the AC and DC systems. Also, available by the Movicon.NExT platform. specific meters have been installed to measure Using the Modbus protocol, the first monitoring current peaks. The 890 AC power meters, located server collects the consumption data from the DC in several stations detect the energy consumption meters in the stations of lines 5 to 8. The data coming of some electrical and mechanical facilities in the from peak demander meters installed in the line 1 stations, and the 55EA DC power meters, located in to 4 are collected in this first monitoring server via several depots, detects the energy consumption of BACnet protocol. All the collected data are shared the vehicles in lines. with the database located on the DB server. All the meters use Modbus protocol communication. The alarms for the different lines and the reports of While the remaining 50 peak meters located in the the acquired consumption models are also notified various lines exchange the acquired data through the and sent from this server. The consumption data from BACnet protocol. the AC meters present in the stations of lines 1 to 4 The main server collects the data from the two are collected via Modbus protocol and stored in the monitoring servers, one installed in the security second monitoring server. In addition, this server network and the other installed in the administrative collects the data of the DC meters through Modbus network. Energy consumption calculations are also protocol and the data of the peak meters of the carried out on the main server through the Movicon lines 1 to 4 and of the relative deposits through the Pro.Energy module of Movicon.NExT. BACnet protocol. All the collected data are shared CASE HISTORY Inter Electric

with the database located on the DB server. the various stations and depots. This is possible The second monitoring server also notifies and sends thanks to the calculation of the consumption data the alarms foreseen for the various lines and the that is carried out every 5 minutes and thanks to the reports of the acquired consumption models. Also, aggregation of the same in tables available in the this server, through a connection script, collects various present databases. further consumption data from the 8 MySQL servers Furthermore, through the web interface, it is possible present in the current system. to view the statistics of energy consumption and All the data acquired by the main server and the two the maximum power required at the level of the monitoring servers are collected into the database individual present units. In addition, it is possible to server. This blind server is directly connected to a PC provide the Energy Manager with reports to analyze installed in the office of the manager of the various energy consumption and efficiently manage the lines. This allows the real-time display of all the data electricity grid according to the assessment and collected through the various dashboards available in fluctuation of the costs provided by KEPCO (Korea Movicon.NExT. Electric Power) company, the national electricity To better manage the connectivity of web supply company. The HMI interface on the PCs also applications, a fifth dedicated server has been allows users to set the different setting values of the installed. This one manages the applications created power meters, such as the CT transformation ratio with Movicon.NExT. In fact, the entire web interface and set the peak alarm logics based on the indications of the 50 web clients available within the system is of the Energy Manager. managed and displayed through this server. Thanks to the modularity of Movicon.NExT, it was possible The system architecture to divide the various applications that comprise Seoul Metro’s request was to provide a system the entire project in different parts. In this way, the that was easy to use and reliable for the collection hardware resources were efficiently distributed, and and monitoring of energy data from 277 stations, the application has been segmented, guaranteeing 80 substations and 16 depots and that supported at the network level the different levels of security various protocols, including Modbus and BACnet. required by the application. In addition, a web interface was required. The application provides constant and real-time This would allow Seoul Metro staff to collect third- monitoring of the energy consumption model of party data from external systems such as DR, CASE HISTORY Inter Electric

“The total energy consumption in August 2019 decreased approximately by 4% compared to August 2018, allowing Seoul Metro to be perfectly in line with the ROI estimated when processing the energy efficiency project.”

Sang Hyun Jeon, Executive Director di Inter Electric

Weather, and ERP. Inter Electric has installed on The benefits each of the two monitoring servers one Movicon. The implementation of the Movicon.NExT architecture NExT Client- Server license and on the web server has provided various benefits to the customer. “In one Movicon Pro.Energy license containing 500 particular,” says Sang Hyun Jeon, Executive Director measuring points. In this way, Inter Electric was able of Inter Electric “the operator has the possibility, to fairly distribute the calculations and aggregation thanks to Movicon Pro.Energy, to identify his own of monitored energy consumption, as required by energy consumption scheme and can compare the Seoul Metro. The BACnet communication option, consumption between the different stations of the which allows access to the field for line 1 to 4 with various lines subways. The energy manager is thus able this type of protocol, was also activated on these two to identify energy consumption and intervene, where monitoring servers. necessary, to reduce consumption.” One Movicon.NExT Server SCADA license was “The total energy consumption” continues Sang Hyun installed on the main server as it was not required Jeon “in August 2019 decreased approximately by to have a local HMI interface. The OPC UA Server 4% compared to August 2018, allowing Seoul Metro option, which allows sharing the data of the HMI to be perfectly in line with the ROI estimated when interface with the PC of the subway control room, processing the energy efficiency project. “ has been enabled was on the main server. Inter Electric staff actively supported the end A Movicon.NExT SCADA license has been installed customer in project planning, designing the on this PC with the only Client option for displaying architecture of the system based on the requests data from the main server. A Movicon.NExT SCADA of Seoul Metro, controlling the various stations and license has also been provided with the only Client providing careful and specific consultancy. option for the PC installed in the office of the “The whole project” concludes Sang Hyun Jeon “was manager of the various lines to view data from the also made possible thanks to the application flexibility database server. of Movicon.NExT and the constant availability of Finally, one SCADA Movicon.NExT license has Progea technical staff, who actively supported us been installed on the webserver dedicated to the both in the pre-sale phase during the formulation of management of the web applications developed the project specifications and in the after-sales phase with Movicon for the 50 web clients required by by providing us with examples and always useful and Seoul Metro. punctual suggestions that have allowed us a rapid implementation of the project”.