• The Journal of Korea Institute of Information, Electronics, and Communication Technology
• /
• v.14 no.1
• /
• pp.91-97
• /
• 2021

ISO/IEC 15118 is an international communication standard for EV(electric vehicle)'s V2G implementation. In the charging/discharging control of an EV based on a communication protocol, there is inevitably a time delay when charging/discharging occurs, and the delay may limit in supplying power flexibility. In this paper, we implemented an ISO/IEC 15118-based V2G emulator and measured the charge/discharge response characteristics. As a result, the time delay appeared as 0.12ms. Accordingly, the power flexibility markets that EV can participate in under the current standard were explored.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.63 no.11
• /
• pp.1564-1570
• /
• 2014

An electric vehicle (EV) not only receives electric power from the electric vehicle supply equipment (EVSE), but it also exchanges the information regarding charging process with the power gird through the EVSE. However, the EV and EVSE communicate using the ISO/IEC 15118 standard while the EVSE and power grid communicate using the IEC 61850 standard. Therefore, the EVSE should support both the ISO/IEC 15118 and IEC 61850 standards, and provide a data mapping function between the two communication protocols so that the EV and power grid, which support different protocols, can communicate with each other throughout the charging process. In this paper, we propose a mapping method of the EVSE, which converts the ISO/IEC 15118 data to IEC 61850 and vice versa, based on the XML schema of each protocol. The proposed method converts the data using the XSL (eXtensible Stylesheet Language) method, which defines the data mapping between two XML schemas. Our approach is more flexible and easier to maintain against changes in charging scenarios and the standards than other existing approaches such as one-to-one data mapping methods.

• Proceedings of the KIEE Conference
• /
• 2015.07a
• /
• pp.28-30
• /
• 2015

전기차 충전 장치가 전기차로부터 ISO/IEC 15118 국제 표준을 따르는 XML 형식의 통신 메시지를 받아 IEC 61850 국제 표준의 SCL (Substation Configuration Language)로 구성되는 논리 노드를 통해 통신 메시지를 전력 계통으로 보낸다. 역방향 통신 메시지의 경우에는 그 역순으로 진행된다. ISO/IEC 15118 국제 표준이 XML 형식을 스키마로 규정하고 있고 IEC 61850 국제 표준이 SCL 형식을 스키마로 규정하고 있으며 두 스키마를 변환하여 ISO/IEC 15118 통신 메시지와 IEC 61850 통신 메시지를 상호 변환할 수 있다.

• Proceedings of the KIPE Conference
• /
• 2013.11a
• /
• pp.83-84
• /
• 2013

최근 국내에서 진행중인 스마트 그리드(Smart Grid) 사업 분야에 속해 있는 스마트 운송(Smart Transportation) 사업의 하나로 전기차 운영이 핵심이 되어 진행이 되고 있다. 그러나 실제적으로 전기차를 원활히 운영하기 위해서는 극복해야 할 여러 문제가 있으며 대표적으로 주행 거리를 좌우하는 배터리 용량 문제와 고객이 어디서든 전기차를 사용하고 충전하는데 불편이 없을 만큼 충분한 충전 인프라 구축 문제가 있다. 충전 인프라는 현재, 완속 충전기와 급속 충전기로 구성되어 있으나 본 논문에서는 완속 충전기에 한정하여 서술하였고 인프라 구축에 있어 표준화 일환으로 미국자동차기술학회에서 제시하는 SAE-J1772 규격에 맞추어 개발한 자사의 완속 충전기에 2012년 독일과 미국의 자동차 업체 주도로 발표된 국제표준(ISO/IEC 15118, Vehicle-to-Grid Communication Interface) 기술 규격이며 향후 충전 인프라에 적용 예상이 되는 PLC 통신 방식을 적용한 완속 충전기 개발에 관하여 소개하도록 하였다.

• KEPCO Journal on Electric Power and Energy
• /
• v.2 no.1
• /
• pp.71-81
• /
• 2016

An EVSE and the EV exchange XML formatted communication messages with each other, whose structure is described by the V2G CI schema in the ISO/IEC 15118 international standard, and the EVSE and the power grid exchange messages based on SCL file with each other, whose structure is described by SCL schema in the IEC 61850 international standard. Because XML files can be restructured by XSLT, V2G messages can be transformed to/from SCL files using XSLT. In this study, the two schemas are analyzed and compared in order for the restructuring of the two differently structured XML instances. As a result, two XSL scripts can be produced for the transformation between XML files conforming ISO/IEC 15118 V2G CI schema and IEC 61850 SCL schema respectively to avoid manual data mapping which can happen in every application development cases.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.14 no.1
• /
• pp.15-25
• /
• 2018

ISO/IEC 15118 is a standard for communications and services for electric vehicle charging infrastructure. Although this standard deals only with data communication between an electric vehicle and a charge station, communication with the outside is essential for establishing an authentication system for vehicle certification and V2G service for electric power transmission. In this study, it was designed to verify the information of electric car charging infrastructure in electric power system through communication link between ISO/IEC 15118 electric vehicle model and IEC 61850 standard MMS protocol. This is demonstrated in the field so that the electric vehicle communication data is linked with the micro grid management system. This could be used as an element technology in other distributed power sources as well as electric cars in the future.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.13 no.6
• /
• pp.1183-1190
• /
• 2018

The environmental regulations are being strengthened all over the world, and the introduction of electric vehicles are actively being considered to cope with them effectively. It is essential to establish a charging infrastructure, which is an essential element of electric vehicle distribution. In this paper, power line communication technology essential for smart charging infrastructure is studied. A control board capable of achieving a physical layer speed of 10Mbps and a TCP/IP layer of 4.5Mbps, which conforms to the ISO/IEC 15118 international standard, and a control board mounted on the board and compliant with international standards. We have developed a software solution to perform functions for linking. In addition, in order to be applied to the combo-type DC fast charger, the hardware was designed to meet the industrial environment standard and the V2G communication module was developed by integrating it with the software solution.

• Journal of Internet Computing and Services
• /
• v.21 no.5
• /
• pp.39-48
• /
• 2020

Recently, the study and development of environment-friendly energy technique have increased in worldwide due to environmental pollution and energy resources problems. In vehicle industry, the development of electric vehicle(EV) is now on progress, and also, many other governments support the study and development and make an effort for EV to become widely available. In addition, though they strive to construct the EV infra such as a charge station for EV, the techniques related to managing charge demand and peak power are not enough. The standard of EV communication has been already established as ISO/IEC 15118, however, most of implemented EVs and EV charge stations do not support any communication between each of them. In this paper, an improved slow charge scheme for non-communication EVs is proposed and designed by using predicting charge demand. The proposed scheme consists of distributed charge model and charge demand prediction. The distributed charge model is designed to manage to distribute charge power depending on available charge power and charge demand. The charge demand prediction is designed to be used in the distributed charge model. The proposed scheme is based on the collected data which were from EV slow charge station in business building during the past 1 year. The system-level simulation results show that the waiting time of EV and the charge fee of the proposed scheme are better than those of the conventional scheme.

• KEPCO Journal on Electric Power and Energy
• /
• v.7 no.2
• /
• pp.329-333
• /
• 2021

V2G (Vehicle to Grid) technology for an EV (Electric Vehicle) has been assumed as so promising in a near future for its useful energy resource concept but still yet to be developed around the world for specific service purposes through various R&BD projects. Basically, V2G returns power stored in vehicle at a cheaper or unused time to the grid at more expensive or highly peaked time, and is accordingly supposed to provide such roles like peak shaving or load levelling according to customer load curve, frequency regulation or ancillary reserves, and balancing power fluctuation to grid from the weather-sensitive renewable sources like wind or solar generations. However, it has recently been debated over its prominent usage as diffusing EVs and the required charging/discharging infrastructure, partially for its addition of EV ownership costs with more frequent charging/discharging events and user inconvenience with a relative long-time participation in the previously engaged V2G program. This study suggests that a Korean DR (Demand Response) service integrated V2G system especially based upon a dynamic charge/pause/discharge scheme newly proposed to ISO/IEC 15118 rev. 2 can deal with these concerns with more profitable business model, while fully making up for the additional component (ex. battery) and service costs. It also indicates that the optimum economic, environmental, and grid impacts can be simulated for this V2G-DR service particularly designed for EV aggregators (V2G service providers) by proposing a specific V2G engagement program for the mediated DR service providers and the distributed EV owners.