Smart Renewable EMS KEPCO KDN 2011. 11. 30 Hello! My name is Nam Cheol Yu. I am coming from KEPCO-KDN(Korea Electric Power Data Network), the sister company of KEPCO. My position is manager of Distribution IT R&D department. My Major Career is to Lead the Development of Power IT Systems such as · Distribution Automation System · Transformer Load Monitoring System · Digital Electricity Meter · Digital Substation Automation System I am very pleased here to give a presentation for Smart Renewable EMS. R&D Department of Distribution Automation System Manager Nam-cheol, Yu

1. SR-EMS Definition Small-scale Entry SR-EMS Definition System operating in conjunction with distribution system that has under 100kW low voltage(380V). Economic and Efficient management system for Small-scale renewable energy sources like PV and Wind power generation. SR-EMS Development Goal Economic Efficiency (less than 5% compared to total cost) SmartGrid TOC linked operation Scalability applicable to each renewable energy power User(Business) Management Convenience Today, I am going to introduce SR-EMS. SR is the abbreviation for Smart Renewable and EMS stands for Energy Management System. I think to understand SR-EMS, you need to know it’s definition. Let me explain small-scale Entry SR-EMS system. It is a system operating in conjunction with distribution system that has under 100kW low voltage. It uses small-scale renewable energy sources such as PV or Wind Power Generation. There are several goals for SR-EMS. Economic Efficiency, Smart Grid TOC linked operation, scalability, Convenience are main goal of SR-EMS.

2. SR-EMS Difference Small-scale Entry SR-EMS Product Difference 100kW Small-scale Entry SR System linked with low-voltage system SME Product Demonstration by interconnecting various kinds of Power devices Economical and compact system for small-scale renewable energy Jeju Demonstration Goal What makes different SR-EMS comparing to other systems. The main point is that it linked with low-voltage system. Also it can interconnect various kinds of Power devices. Lastly it is very economical and compact system. There is a Demonstration complex in Jeju island for the testing of SR-EMS. In this demonstration we are focusing on small-scale entry business model. Energy storage device and Operation linkage are also a important goal. Demonstration suitable for small-scale entry business model Energy storage device for stable Wind power/PV Generation output Operation linked with 100kW small-scale Renewable Energy Source EMS

3. Commercialization Strategy 『Economic One-package Solution optimized for small-scale Distributed power generation』 Goal Small-scale PV + Multifunctional PCS + BMS + *VRLA Battery Small-scale Wind Power + PCS/BMS + Lithium Polymer Battery + AVC Efficient Triple junction cell Solar Battery that reformed shortcoming of Conventional silicon cell Multifunctional PCS Use including Active/Reactive Power control and Power quality compensation function  Long life VRLA that enables cost savings over 30% High-performance Lithium Polymer battery for stability of irregular output of Wind power generation  PCS, BMS hybrid power conditioning device and Battery management system Application Economic **AVC for Compensation for reactive power of Wind power generation Strategy We have several strategies for the commercialization of SR-EMS. To achieve goal, economic one-package solution optimized for small-scale distributed power generation, strategies are divided to two regions according to type of generation. Left one shows strategy for the PV and the right box contains strategy for the wind power. One more important thing is that to ensure interoperability between systems, precondition such as interoperability standard is to be demonstrated and applied. Pre condition Interoperability Standard Ensure interoperability between systems Standardization through demonstration * VRLA(Valve Regulated Lead Acid) ** AVC(Automatic VAR Compensator)

4. SR-EMS System Configuration Total Operation Center (TOC) Demonstration Test Center Wind Power Prediction System EMS KPX Smart Renewable Network KEPCO Low Voltage System Connection CS RT 3ø 380V AC DC PCS S/W S/W S/W Wind Power 100KW Convertor S/W S/W RT BMS Reactive Power Compensation Equipment Battery Relay S/W RT S/W Small Hydro Power 60KW This diagram shows the SR-EMS system configuration. In the diagram, there is two types of line, red line represents power network and blue line represents communication network. Power network line show the flow of power from each renewable power plant to S/W and its destination. There are several RTs attached to PCS, Relay, RT. It transmit information to smart renewable network. Demonstration Test Center can control entire system through this network. RT 3ø 380V Multi-PCS S/W S/W PV Power PCS : Power Conditioning System BMS : Battery Management System CS : Control System S/W : Switch Power Network Communication Network 100KW S/W BMS Battery

4. SR-EMS System Configuration PV Waterworks, Electricity D-1 Market Price PV Power generation Monitoring Small Hydro Power Planning/ Bid Price Wind Power generation Monitoring DNP3.0 SR Demonstration Center EMS (KEPCO KDN) This is also a diagram of SR-EMS system configuration, but this is a different point of view. Although inner structure of each renewable power system is not equal, the way of transmitting information is same. Monitored information from each renewable power plant are transmitted to EMS of SR Demonstration center. Then it can communicate information such as D-1 market price, Planning/Bid price with the TOC. Waterworks, Electricity Wind Power EMS : Energy Management System VRLA : Valve Regulated Lead Acid PCS : Power Conditioning System BMS : Battery Management System

5. SR-EMS Key Features(Screen Configuration) Home Page/Login Main Page FIRST DEPTH System status Event Management Power Trading System Connection System Management Power Source Management SECOND DEPTH Prediction/ Unit Cost Operator Management Main Screen Measurement TOC Configuration PV TOC Connection Information Control Bid Management Power Plant Equipment Wind Power Successful Bid Management Alarm Event Communication Small Hydro Power This diagram shows the screen configuration of SR-EMS. After login to the home page, you can see the main page containing first depth such as system status, event management, Power Trading, System connection, System Management, Power source management. Each menu of first depth contains several functions. Power Trading Accurate account System Log Analysis User Log

5. SR-EMS Key Features(Screen Configuration) Comprehensive Management Screen This picture shows comprehensive management screen.

5. SR-EMS Key Features(Screen Configuration) PV Power Management Screen This picture shows PV power management screen.

5. SR-EMS Key Features(Screen Configuration) Wind Power Management Screen This picture shows Wind Power Management Screen.

5. SR-EMS Key Features(Screen Configuration) Small Hydropower Management Screen This picture shows small hydropower management screen.

6. Jeju Demonstration System(Configuration) Demonstration system and Configuration Section Capacity Company Completion date EMS Small-scale EMS Control 1000 Pt Kepco KDN ’11.4 Construction Generation Source PV power 100kW Waterworks Electricity ‘10.9 Completion Wind power ‘11.3 Completion Small Hydropower 60kW KOSPO ‘10.10 Completion

7. Business Model Target Market : Islands/rural region and Small area distributed generation <Case: Renewable complex power system at Chuja Island> In spite of high installation cost, cost and CO2 reduction by the complement of the Wind Power generation is possible. Section System configuration Cost($/KWh) Renewable Energy Rate CO2 Emissions Diesel Power 250KW Diesel Power 0.335 0% 1,047 Analysis Ⅰ 5 Wind Power 50kW 200kW BATT 100kW Inverter 0.278 49% 673 Analysis Ⅱ 10kW PV 600kW BATT 150kW Inverter 0.284 52% 593 Finally, business model for SR-EMS is to be explained. Its first target market will be islands/rural region and small area distributed generation. This mean is very nice Power Generation system for SKA Project. We can see the successful case of renewable complex power system at Chuja island Iin my contry. In spite of high installation cost, cost & CO2 reduction by the complement of the wind power generation was possible. Lower table shows the cost and CO2 emissions according to system configuration. In this table we can see that reduction of both cost & CO2 emissions as increasing renewable energy rate. 13

7. Business Model(Continued) Target Market : Overseas Small Interconnection/Stand-alone Renewable Energy United States Emerging Market for Small city/farm/public institution - Government support for wind power installation that is under 100KW - Provide installation cost 30% or under 4,000$ tax benefit Developing Countries Major position as Remote place Electrification Business by independent distributed renewable energy source Increasing energy demand by rapid economic growth countries like China, India, Brazil - Renewable energy independent power system to supply energy - Dynamic promotion both securing resources and Development of Renewable energy Unique alternative Under situation like High oil prices, Greenhouse gas emission reduction pressure Second target market can be overseas small interconnection/stand-alone renewable energy. Overseas market can be divided to two part, United State and developing countries. In the US, we are focusing on emerging market for small city/farm/public institution. In the developing countries, we are try to keep major position as remote place electrification business by independent distributed renewable energy source. Also this system is used to SKA Project.

Korea was selected as a leader in Smart Grid technology at 8. Conclusion Strength of Korea Electricity Korea Electricity Industry One of the biggest energy-consuming countries in the World Relatively new power infrastructure & Superior ability of operation “World Best” power qualities - Outage hour in Korea : Just 14.29min/year (France : 57min/year, UK : 68min/year, USA 122min/year) Loss rate of transmission/distribution in Korea : about 4% (UK : 9%, USA: 7%, JAPAN : 5%) Korea was selected as a leader in Smart Grid technology at 2009 G8 Summit! Power IT Infra : Young and already SMART Related IT Convergence Industry “World Best” of Korea IT infra  “IT KOREA” Broadband internet deployment ratio : World’s #1(95.9%, OECD 2009) Builds the world’s first nationwide Smart Grid system currently Jeju Smart Grid Test-bed : World’s largest Smart Grid community “World Best” smart home appliance, automobile, EV, construction, and shipbuilding

8. Conclusion Power System Design (PV 100Kw) for SKA. EMS SW STATCOM, TOC SW STATCOM, AVC Power Grid PV(100Kw) PCS BMS Load Bank Battery

Thank you ! ync@kdn.com 010-3444-2001 This is the end of the presentation. I hope you understand about SR-EMS. If there is a question, please feel free to ask. ync@kdn.com 010-3444-2001