Lim I.-H.,LSIS |
Sidhu T.S.,University of Ontario Institute of Technology
International Journal of Electrical Power and Energy Systems | Year: 2016
Importance of protection IEDs in IEC 61850-based substations has increased by enhancing performance of IEDs but local backup scheme in the substation is not considered important. In the existing local backup method, two protection IEDs are installed for one protection target. This method is useful for local backup of the IEDs. However, local backup at simultaneous fault of the protection IEDs is not performed in conventional substation because it has limitations on operational environment. However, IEC 61850-based substation improves operational environment with high speed communication network and high performance IEDs; and the simultaneous fault problem can be resolved by developing new devices and schemes. Therefore, this paper proposes a new local backup scheme for simultaneous faults of protection IEDs in an IEC 61850-based substation. The proposed backup scheme is configured as self-supervision-based monitoring, new improved local backup IED, and local backup scheme; and the proposed scheme is implemented and tested using IEC 61850 SISCO library on a laboratory test bed. © 2015 Elsevier Ltd.
News Article | March 2, 2017
韓国・京畿--(BUSINESS WIRE)--（ビジネスワイヤ） -- LS産電（LSIS）は、東京の国際展示場ビッグサイトで開催されるスマートエネルギーWeek（WSEW）の国際スマートグリッドExpo2017に参加します。3月1～3日に開催されるこのイベントでは、新千歳メガソーラーEPCプロジェクトについて紹介し、再生可能エネルギーの新しいトータルソリューションも発表します。このソリューションは、定置型蓄電池システム（ESS）を利用した日本最大のプロジェクトである新千歳メガソーラーEPCプロジェクトと接続可能です。 世界の電力、エネルギー、発電業界に属する企業約1500社が、日本最大のスマートエネルギー展示会であるWSEWに参加します。 LS産電は、今年下半期に完了予定の新千歳メガソーラーEPCプロジェクトを紹介します。当社は、EPC（設計・調達・建設）とO&M（運用・保守）に関する能力についても展示します。新千歳太陽光発電プラントは、39メガワットの電力容量と28メガワットの設備容量を実現します。また、このESS（エネルギー管理システム）を用いたプラントは、当地域で最
News Article | October 26, 2016
Nanyang Technological University is building Southeast Asia's first offshore system that will integrate multiple renewable energy sources such as solar, wind, tidal, diesel, and power-to-gas technologies Nanyang Technological University (NTU Singapore) is building an offshore system that will integrate multiple renewable energy sources such as solar, wind, tidal, diesel, and power-to-gas technologies. The region's first large-scale offshore power grid system, it will have four hybrid microgrids, occupying over 64,000 sq metres of land or roughly about eight soccer fields. The system will be built at Semakau Landfill which is managed by the National Environment Agency (NEA). It will have over 3,000 sq. metres of photovoltaic (PV) panels, including energy storage systems that are already in operation. The deployment of the first hybrid microgrid was announced today by Mr Masagos Zulkifli, Minister for the Environment and Water Resources at the Asia Clean Energy Summit (ACES) held at the Sands Expo and Convention Centre, Marina Bay Sands. "I am happy to announce that the first microgrid has just been deployed and it will enable the National Environment Agency (NEA) to power its infrastructure on Semakau Landfill using electricity generated through zero-carbon means. The use of energy storage and microgrid control technologies will allow the landfill to reduce its reliance on diesel-based power and transition towards renewable energy. I am also pleased to share that REIDS will deploy 3 further microgrids on Semakau Landfill to test the interoperability of various microgrid solutions." Once all four hybrid microgrids are fully built, they are expected to produce stable and consistent power in the megawatt (MW) range, suitable for small islands, isolated villages, and emergency power supplies. It will also produce energy amounting to the equivalent of the average energy consumption of 250 4-room HDB flats for a year. Fish hatcheries and nurseries located at Semakau Landfill will be among the first to be powered. Built under the Renewable Energy Integration Demonstrator-Singapore (REIDS) initiative led by NTU, the hybrid power grid system will test the integration of solar, wind, tidal-current, diesel, energy storage and power-to-gas technologies and ensure these energy sources operate well together. NTU Chief of Staff and Vice-President (Research) Prof Lam Khin Yong said "The deployment of this first hybrid microgrid is a big leap towards low-carbon electricity production for the nation and the region. As a global leader in sustainability research, NTU is proud to champion this ground-breaking initiative and lead Singapore's charge in developing practical renewable energy solutions." Supported by the Singapore Economic Development Board (EDB) and NEA, NTU's REIDS initiative will also facilitate the development and commercialisation of microgrid technologies suited for a tropical island. Mr Goh Chee Kiong, Executive Director of Cleantech at EDB said, "Singapore has identified microgrids as a key growth area for the clean energy industry. REIDS is the largest microgrid R&D platform in Southeast Asia and therefore is instrumental to Singapore's ambition to achieve a global leadership position in microgrids and serve the regional markets. Since its launch in 2014, the REIDS platform has been successful in attracting leading solution providers and regional adopters to develop, demonstrate and export microgrid solutions from Singapore." Mr Ronnie Tay, Chief Executive Officer of NEA, said, "The REIDS project will lead to innovative sustainable energy solutions that will help to address climate change. The National Environment Agency (NEA) is very pleased to support this landmark effort to explore the integration of renewable energy into micro-grid solutions." Managed by NTU's Energy Research Institute (ERI@N), the REIDS initiative is expected to attract $20 million worth of projects over the next five years, in addition to the initial $10 million investment in infrastructure at the landfill. REIDS has attracted investments from top energy and microgrid companies which aim to co-develop such solutions to serve the growing market in Southeast Asia. The four microgrid systems will be developed by ENGIE, GE Grid Solutions, LS Industrial Solutions (LSIS) and Schneider Electric. Other partners include Accenture, Class NK, DLRE, Renewable Energy Corporation (REC), Trina Solar. LSIS and Sony were also announced as partners today at ACES 2016. The REIDS platform will pave the way for similar technologies to be developed and exported to serve the numerous remote communities in Southeast Asia and beyond. It has already attracted the interest of regional adopters such as island communities and utilities. For instance, Bawah Island, an Indonesian island in the South China Sea, and Meralco, the largest electric distribution company in the Philippines, will partner REIDS to develop offshore microgrid projects. See Annex A for more info on the hybrid microgrids project and Annex B for a list of companies involved in NTU's REIDS initiative. A research-intensive public university, Nanyang Technological University, Singapore (NTU Singapore) has 33,500 undergraduate and postgraduate students in the colleges of Engineering, Business, Science, Humanities, Arts, & Social Sciences, and its Interdisciplinary Graduate School. It has a new medical school, the Lee Kong Chian School of Medicine, set up jointly with Imperial College London. NTU is also home to world-class autonomous institutes - the National Institute of Education, S Rajaratnam School of International Studies, Earth Observatory of Singapore, and Singapore Centre for Environmental Life Sciences Engineering - and various leading research centres such as the Nanyang Environment & Water Research Institute (NEWRI), Energy Research Institute @ NTU (ERI@N) and the Institute on Asian Consumer Insight (ACI). Ranked 13th in the world, NTU has also been ranked the world's top young university for the last two years running. The University's main campus has been named one of the Top 15 Most Beautiful in the World. NTU also has a campus in Novena, Singapore's medical district. The hybrid microgrids at Semakau Landfill will be implemented in two phases. The first phase, which has been completed, involved installing a microgrid facility with over 3,000 metre square of photovoltaic (PV) panels as well as a large-scale energy storage system. The lithium-ion energy storage system (ESS) can store up to 200 kilowatt hour (kWh), similar to the monthly energy consumption of a two-room HDB unit, and will serve as a medium term energy storage. Currently in the second phase, a 64,400 metre square plot (about 8 soccer fields) was cleared to make way for three separate microgrids which can either be operated separately or be integrated and function as a single power facility. These separate microgrids will each manage multiple renewable energy sources such as photovoltaic panels, wind turbines, diesel generators and energy storage systems, including supercapacitors. Supercapacitors differ from normal lithium-ion energy storage as they are able to both quickly store and discharge a large amount of electricity. However, they are unable to hold the electricity over a long period of time, serving as short term energy storage. Excess energy generated from the microgrid can be used to generate hydrogen that can be stored long-term to be subsequently used in fuel cells which convert hydrogen into electricity, generating far less emissions as compared with oil and gas. 1. Accenture - one of the world's leading organizations providing management consulting, technology and outsourcing services 2. Class NK - not-for-profit society dedicated in providing classification and technical services to maritime and clean tech industries 3. DLRE - Singaporean company focusing on microgrids, distributed generation, remote area power systems 4. ENGIE - world's largest independent electricity producer with activities in electricity generation and distribution, natural gas and renewable energy 5. General Electric Grid Solutions - industry leader in electric power generation, electric grid equipment, and transport solutions 6. LSIS - South Korea's leading electrical components manufacturer 7. Renewable Energy Corporation (REC) - top company that operates the world's largest integrated solar manufacturing complex outside of China in Singapore 8. Schneider Electric - global company specialising in electricity distribution, automation, and energy management 9. Sembcorp - leading energy, water and marine group operating across five continents worldwide. 10. Sony - leading corporation in the field of large-scale energy storage systems for power grids 11. Trina Solar - pioneer of China's photovoltaic industry and global solar modules, and solutions provider 12. Varta AG - a leading global energy storage solutions provider 13. Vestas - a world leader in manufacturing and installation of wind turbines 1. Economic Development Board - Lead government agency for planning and executing strategies to enhance Singapore's positing as a global business centre 2. National Environment Agency - Lead government agency responsible for improving and sustaining a clean and green environment in Singapore 1. Sustainable Energy Association of Singapore (SEAS) - SEAS represent the interests and provide a common platform for companies in renewable and clean energy to collaborate and undertake viable projects together
News Article | March 2, 2017
GEONGGI, South Korea--(BUSINESS WIRE)--LSIS will participate in International Smart Grid Expo 2017 of World Smart Energy Week (hereafter referred to as “WSEW”) in Big Sight, an international exhibition center located in Tokyo, Japan. The event will be held from March 1st to 3rd, to introduce Shin Chitose megasolar EPC project and also unveil a new renewable energy total solution. This solution is interconnectable with the Shin Chitose megasolar EPC project, the largest ESS-based project in Japan. About 1,500 companies in the global power, energy, and power generation industry are participating in WSEW, the biggest smart energy exhibition in Japan. LSIS will showcase the Shin Chitose megasolar EPC project which will be completed in the second half of the year. Also, the company will display its competencies in EPC (Engineering, Procurement, and Construction) and O&M (Operation and Maintenance). Shin Chitose solar power plant will deliver 39MW of power capacity and 28MW of installed capacity. Also, this ESS (Energy Management System) plant will come with 17MW of PCS and 13.77MWh of battery, the biggest size in the region. The plant entered into a PPA (Power Purchase Agreement) with HEPCO and will stably supply power for 20 years with 40 yen per kWh. In the PV solution zone, there are various modules including floating PV modules with mechanical devices, buoyancy modules, and floating-only modules with high output and warranty. Other products including dual modules and high-output models are expected to attract visitors. In the DC solution zone, the company will display new DC product lines optimized for new renewable power generation including DC 1500V MCCB, DC 1000V ACB, and RMU (Ring Main Unit). Additionally, total solutions in the smart energy sector such as FEMS (Factory Energy Management System) and IPP (Independent Power Producer) will be displayed. Founded in 1974 in South Korea, LSIS has established global networks based on its technological prowess in electric energy and delivered various projects across the world in the smart energy industry including Japan. One of the LSIS officials says, “This will be a great opportunity to promote Japan-specialized solutions and total smart energy solutions to our customers.”
Amari S.,Ecole Normale Superieure de Cachan |
Demongodin I.,LSIS |
Loiseau J.J.,French National Center for Scientific Research |
Martinez C.,French National Center for Scientific Research
IEEE Transactions on Automatic Control | Year: 2012
The aim of the presented work is the control of Timed Event Graph to meet tight temporal constraints. The problem of temporal constraints is formulated in terms of control of linear Max-Plus models. First, the synthesis of a control law that ensures the satisfaction of a single constraint for a single input system is presented. Then, the single input multi-constraints problem is tackled and finally, the method is extended to the multi-inputs, multi-constraints problem. The proposed method is illustrated on the example of a simple production process. © 2011 IEEE.
Yoo A.,LSIS |
Sul S.-K.,Seoul National University |
Kim H.,LSIS |
IEEE Transactions on Industry Applications | Year: 2011
This paper presents a novel flux-weakening strategy for an induction machine driven by an electrolytic-capacitor-less inverter. In the electrolytic-capacitor-less inverter, the dc-link voltage is fluctuating at six times the frequency of the input three-phase source due to its small dc-link capacitance. Hence, the decoupling of the fluctuation and maximum utilization of the dc-link voltage is a major issue in the electrolytic-capacitor-less inverter. In this paper, the cost function is set to increase the voltage utilization of the inverter for the flux-weakening operation of an induction machine. With the proposed flux-weakening strategy, the operating speed of the induction machine is extended above the base speed without any stability problems. The experimental results show the effectiveness of the proposed strategy. © 2011 IEEE.
Park O.-S.,STX Engine |
Park J.-W.,Pusan National University |
Bae C.-B.,LSIS |
Kim J.-M.,Pusan National University
Journal of Power Electronics | Year: 2013
This paper proposes a new dead time compensation method of independent six-phase permanent magnet synchronous motors (IS-PMSM). The current of the independent phase machines contains odd-numbered harmonics because of the dead time and the nonlinear characteristics of the switching devices. By using the d-q-n three-dimensional vector analysis, these harmonics can be extracted at the n-axis current. Thus, the current distortion can be compensated by controlling the n-axis current of the IS-PMSM to zero. The proposed method is simple and can be easily implemented without additional hardware setup. The validity of the proposed compensation method is verified with simulations and several experiments.
Yoo A.,LSIS |
Lee S.-H.,Myongji University |
Yoon Y.-D.,Myongji University
2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015 | Year: 2015
This paper proposes a parameter identification method of induction motors (IMs) at a standstill using integral calculations. The rotor time constant and magnetizing inductance are identified. During identification process, the induction motor to be tested is consistently excited according to a pre-determined current reference. Using the pre-determined current, the tested motor emulates the rated rotor flux and the rated slip condition even at a standstill. Therefore, the identification result is quite accurate. And, this method is based on integral calculation so that the results are robust to measurement noise. The repeatability of the identification result is remarkable. Due to the simplicity of the proposed technique, this method can be easily applied to the commercial inverter products. Experimental results confirm the effectiveness of the proposed method. © 2015 IEEE.
Choi S.-C.,LSIS |
Lee J.,LSIS |
Hong C.,LSIS |
9th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2015-ECCE Asia | Year: 2015
Electric machine drive systems have a protection mechanism for momentary power interruption. Generally, when the momentary power interruption is occurred, outputs of a drive system are stopped for the protection. For stable continuous operation, it is sometimes required the restarting strategy which is called as a flying start when the input power is recovered and the rotor is still rotating freely due to the large inertia of high power electric machine. The paper suggests the flying start strategy at momentary power loss. The proposed strategy is composed of the phase-locked loop(PLL) and Double Second-Order Generalized Integrator(DSOGI), based on the measured input voltages at electric machine side and the voltage compensation. The magnitude, frequency and phase angle of the residual voltages are estimated with PLL and DSOGI and the induced initial voltage is compensated considering the operating conditions. With the proposed strategy, the target drive system can be restored to the operation point of a prior failure. The proposed method is validated by the experiment with a miniature of MV drives. © 2015 Korean Institute of Power Electronics.
News Article | December 8, 2016
— The report "Intelligent Motor Controller Market by Voltage (Low & Medium), by Motor Type, by End User (Oil & Gas, Power & Water, Food, Mining, Chemicals, & Pharmaceutical), by Application (Pump, Fan & Compressor), & by Region - Global Trends & Forecasts to 2021", The intelligent motor controller market is projected to grow from an estimated USD 656.9 Million in 2016 to USD 857.6 Million by 2021, at a CAGR of 5.48% from 2016 to 2021. Browse 73 market data tables with 51 figures spread through 161 pages and in-depth TOC on "Intelligent Motor Controller Market" Increasing demand for smart, multifunctional, and integrated devices in industries; growing concerns regarding motor efficiency; and rising adoption of industrial automation in developing regions are driving the global market for intelligent motor controller. The oil & gas industry is expected to occupy the largest share of the intelligent motor controller market, by end-user The oil & gas industry is the largest end-user industry for intelligent motor controller, due to the large-scale application of motor driven equipment in the industry. Water & wastewater, power generation, and food & beverage industries are the other major end-users that employ smart motor control systems. The market for intelligent motor controller in the water & wastewater industry is expected to grow at the highest CAGR during the forecast period. This growth is attributed to rising urbanization and pressure on efficient use of existing water resources. AC motors segment is expected to account for the largest share of the intelligent motor controller market, by motor type AC motors are estimated to constitute the largest segment of the intelligent motor controller market. AC motors are widely employed within the industry, owing to low-cost, robust construction, and compatibility with almost all industrial applications. Major end-user industries such as oil & gas, water & wastewater, power generation, and food & beverage employ AC motors for diverse applications. Intelligent motor controller for other motor types such as DC, stepper, and servo constitute a very small share, and is projected to grow at a slower rate as compared to AC motors segment. Europe is currently the largest market; however, North America is poised to dominate the global intelligent motor controller market during the forecast period Europe is estimated to be the largest market for intelligent motor controller in 2016, with Germany expected to lead the market in terms of growth rate from 2016 to 2021. North America is expected to surpass the European market by 2021, owing to higher projected growth rate. Meanwhile, in this report, the intelligent motor controller market has been analyzed with respect to five regions, namely, Asia-Pacific, Europe, North America, South America, and the Middle East & Africa. The intelligent motor controller industry is expanding in developed countries, owing to rising preference for smart devices. To enable an in-depth understanding of the competitive landscape, the report profiles some of the leading players in the intelligent motor controller market, including ABB Ltd. (Switzerland), General Electric Company (U.S.), Rockwell Automation (U.S.), and Siemens AG (Germany). Other players operating in the market include Mitsubishi Electric Corporation (Japan), Roboteq Inc. (U.S.), Nanotec Electronic GmbH & Co. KG (Germany), Schneider Electric SE (France), NXP Semiconductors (The Netherlands), Fairford Electronics (U.K.), LSIS Co. Ltd. (South Korea), and Larsen & Toubro (India) “The study answers several questions for stakeholders, primarily which market segments to focus on in the next 2–5 years for prioritizing efforts and investments.” MarketsandMarkets is the largest market research firm worldwide in terms of annually published premium market research reports. Serving 1700 global fortune enterprises with more than 1200 premium studies in a year, M&M is catering to a multitude of clients across 8 different industrial verticals. We specialize in consulting assignments and business research across high growth markets, cutting edge technologies and newer applications. Our 850 fulltime analyst and SMEs at MarketsandMarkets are tracking global high growth markets following the "Growth Engagement Model – GEM". 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