EE Building 7F R92709
Professor Le-Ren Chang-Chien
Address
Email

TEL
+886-6-2757575 ext.62387
Lab Weblink
Power System and Converter Design Lab
(R92781/ext.62400-1579)
Background
Educations
2002
Ph.D. School of Electrical and Computer Engineering,Purdue University, USA, December
1998
M.S.E.E. Department of Electrical and Computer Engineering,University of Wisconsin-Madison, USA, May
1993
B.S. Department of Engineering Science,National Cheng-Kung University, Taiwan, June
Experiences
2025/08-now
Deputy Director, Smart Resilient Sustainable Energy Research Center, National Cheng Kung University
2024/11-now
Technical director of Renewable Energy, Green Energy and Environment Research Laboratories(Industrial Technology Research Institute)
2020/11-now
Vice President(Taiwan Power and Energy Engineering Association)
2023/03-now
Director of the Power Reliability and Resilience Promotion and Management Office(Ministry of Economic Affairs)
2013/02-now
Professor (National Cheng-Kung University )
2025/02-2025/08
Deputy Director for Industry–Academia Collaboration, Hi-GEM Center for Cross-Dimensional Green Energy Materials, National Cheng Kung University
2022/04-2024/11
Deputy Director General of the Green Energy and Environment Research Laboratories(Industrial Technology Research Institute)
2022/04-2024/09
Director of the Grid Management and Modernization Strategy Office(Industrial Technology Research Institute)
2021/08-2022/04
Deputy Director of the Grid Management and Modernization Strategy Office(Industrial Technology Research Institute)
2019-2020
Senior Distinguished Researcher(Industrial Technology Research Institute)
2018/01-2019/12
Advisory Committee Member(Taiwan Power Company)
2018/01-2019/12
Council Member(Taiwan Power and Energy Engineering Association)
2017/08-2020/07
Director of Electrical Laboratories(National Cheng-Kung University )
2009-2013
Associate Professor (National Cheng-Kung University)
2003-2007
Assistant Professor (National Cheng-Kung University)
1998-2002
Research assistant (Purdue University)
1998-2002
Teaching assistant (Purdue University)
Specialities
- Power System Operation and Control
- Power Electronics and Converter Design for Distributed Generation
- Smart Grid
- Large Scale Wind Farm Dispatch and Control
- Applications for Electrical Machinery and Power Electronics in Power System
- Low Power Converter SoC Design
- Analog/Digital Power Management IC Design
Publication
Journal
more
less
- Chung-Chia Wu, Le-Ren Chang-Chien, Hsuan Liang, Chun-Kai Liu, `` Pre-Op Diagnostics of Power Switch in Three-Phase Full-Bridge Inverters", Accept to publish in IEEE Transactions on Industry Applications, Mar. 2026 (SCI)
- Yu-Hsuan Chen, Le-Ren Chang-Chien, Chun-Hsun Wu, `` Digital Slope Compensation Framework for Achieving Robust Frequency and Voltage Regulation in Ripple-Controlled Buck Converters with Very Low-ESR Output Capacitors", Accept to publish in IEEE Journal of Emerging and Selected Topics in Power Electronics (JESTPE), Mar. 2026 (SCI)
- Pei-Jung Yang; Chun-Hsun Wu; Che-Yen Yeh; Le-Ren Chang-Chien, `` Digital Adaptive On-Time and Transient-Optimized Ripple Controlled Buck Converter", IEEE Access, DOI: 10.1109/ACCESS.2023.3336013, Vol.11, pp. 135351 – 135364, 2023 (SCI).
Conference
more
less
- Jia-Ming Zhang, Le-Ren Chang-Chien, Ching-Ran Lee, Che-Min Kung, Wen-Tien Tsai, Two-Step Bootstrap Control for Spike Current Suppression in Switched-Capacitor Converter, 2025 IEEE Energy Conversion Congress & Expo (ECCE2025), Oct2025, Philadelphia, USA
- Jia-Ming Zhang, Le Ren Chang-Chien, Active Gate Drive for Spike Current Suppression in Switched-Capacitor Converter, 2025 Taiwan and Japan Conference on Circuits and Systems (TJCAS2025), Aug 2025, Kaohsiung, Taiwan
- Chung Chia Wu, Hsuan Liang, Le Ren Chang-Chien, Chun Kai Liu, Health Status Monitoring of Power Switches in Three-Phase Full-Bridge Inverters, 2025 IEEE Industry Applications Society Annual Meeting (IAS 2025), June 2025, Taipei, Taiwan
Patent
more
less
- Forward Converter and Forward Power Factor Corrector(TW202504226A)
- Switching Control Method and Control System for Switched Reluctance Motor(TWAA-202141917)
- Constant-Frequency Modulated Direct Torque Control Method and Apparatus Thereof(I676346)
Others
more
less
- Ph.D. Dissertation (2002) “An automatic generation control with adaptive frequency bias setting for NERC performance standard”, Purdue University, West Lafayette, IN., USA
- International Future Energy Electronics Conference (IFEEC2013), Secretariat
- The 4th IASTED Asian Conference on Power and Energy Systems (AsiaPES 2007), International Program Committee.
Projects
- Evaluation of wind power curtailment rate and wind power curtailment risk in the year of 2032, Orsted, PI (2026.03~2026.05)
- Development of Control Mechanisms for UPS Fault Ride-Through (FRT), K.T. Li Delta Electronics Research Project, One-year project, Budget: 800,000 NTD, PI (2026/03/01~2027/02/28)
- Development Project of Power Supply Converter Modules for Space Applications I, MilDef Crete Inc. Industrial-Academic Collaboration Research Project, One-year project, Budget: 1.5 million NTD, PI (2026/02/01~2027/01/31)
- Taipower Grid Resilience and Innovation Partnership Program, Specialized Research Project (Frontier Technology Alliance Collaboration), 114-2622-8-110 -003 -, Co-PI (2025/11/01~ 2026/10/31)
- R&D and Testing of Grid-Tied/Islanded Operation and Stability Technology for Net-Zero Grid-Forming Microgrids (1/2), National Science and Technology Council (NSTC) General Strategy Project, NSTC (114-2218-E-006 -009 -), PI (2025/07/01~2026/06/30)
- Autonomous Power Sharing Control for UPS Parallel Applications, K.T. Li Delta Electronics Research Project, One-year project, PI (2025/03/01~2026/02/28)
- Evaluation of wind power curtailment rate and wind power curtailment risk in the year of 2030/2031, Orsted, PI (2023.11~2024.03)
- Modeling Analysis, Optimized Design, and EMI Mitigation Strategies for Wide Bandgap (WBG) Driving Circuits, National Science and Technology Council (NSTC) Research Project, NSTC 112-2221-E-006 -031 -MY3, Three-year project, PI (2023.08~2026.07)
- Integrated Resource Planning for the Power Industry under 2050 Net-Zero Emissions: Exploring Energy Transition Paths with Minimum Conflict and Maximum Consensus, NSTC Interdisciplinary Research Project, NSTC (113-2627-M-006 -002 -, 112-2627-M-006 -004 -, 111-2627-M-006 -007 -) Three-year project, Co-PI (2022.08~2025.07)
- Development and Design of All-Digital Ripple-Controlled Buck Regulators, National Science and Technology Council (NSTC) Research Project, NSTC 112-2221-E-006 -026 -MY2, Two-year project, PI (2023.08~2025.07)
- Intelligent Gate Driving and Thermal Modeling of Power Devices, Delta Electronics, Inc., PI (2021.09~2023.01)
- Realizing Optimal Wind Turbine Inertial Kinetic Energy and Wind Farm Output Considering Different Operating Modes and Wake Effects, Ministry of Science and Technology (MOST) Research Project, MOST 110-2221-E-006 -131 -MY2-, Two-year project, PI (2021.08~2023.07)
- Multi-objective Function Optimization of Mid-to-Long Term Generation Scheduling Considering Renewable Energy Variation Rate, Forced Outage Rate, and Air Pollution Control, MOST Research Project, MOST 110-2221-E-006 -133 -MY2-, Two-year project, PI (2021.08~2023.07)
- Research on Estimation Techniques for Optimal Ancillary Service Reserve Capacities under High Renewable Energy Penetration, Taiwan Power Company (Taipower), TPC - 546-21010906, PI (2021.01~2022.12)
- Evaluation of wind power curtailment rate and wind power curtailment risk, Orsted, One-year project, PI (2021.01~2021.10)
- Health Diagnosis and Chip Temperature Estimation for Motor Drive IGBT Devices (II), Delta Electronics, Inc., PI (2020.09~2021.08)
- Development of Protection Relay Setting Specifications for Over-Frequency, Under-Frequency, and V/Hz of Various Generator Types, Taiwan Power Company (Taipower), TPC - 546 – 2101 - 0801, PI (2020.06~2021.05)
- Autonomous and Flexible Coordinated Decentralized Control for Multi-Microgrids, MOST Industrial-Academic Collaboration Research Project, MOST 109-3116-F-006-019 -CC1, One-year project, PI (2020.04~2021.09)
- Development of a Three-Phase Bridgeless Boost High Power Factor Correction (PFC) AC-DC Converter, Prosol Corporation, PI (2020.05~2020.04)
- Health Diagnosis and Chip Temperature Estimation for Motor Drive IGBT Devices, Delta Electronics, Inc., PI (2019.09~2020.08)
- Implementation of High-Performance Non-Compensator Controlled Voltage Regulators using Mixed-Signal Architecture, MOST Research Project, MOST 108-2221-E-006 -134 -MY2-, Two-year project, PI (2019~2021)
- Simulation Analysis and Design Research of High-Efficiency, High-Switching-Frequency Power Electronics Applied to Motor Drive Controllers, National Chung-Shan Institute of Science and Technology (NCSIST) Project, Co-PI, NCSIST-301-V110(108),(2019.02~2019.12)
- Construction Support and Maintenance of the Power Application Planning Platform, Institute for Information Industry (III), PI, (2019.01~2020.12)
- Research on Feeder Reconfiguration and Power Transfer Technology for Regional Grids with Increased Green Energy Penetration, Institute of Nuclear Energy Research (INER), Atomic Energy Council, PI(2019.02~2019.12)
- Key Characteristic Evaluation, Prototype Design, and Verification of High-Carrier PWM Servo Drives (Year 2), Delta Electronics, Inc., PI (2018.09~2019.08)
- Construction and Analysis of Cloud-Based Energy Information Systems, Taiwan Semiconductor Manufacturing Company (TSMC), Six-month project, PI(2018.07~2018.12)
- Key Characteristic Evaluation, Prototype Design, and Verification of High-Carrier PWM Servo Drives (Year 1), Delta Electronics, Inc., PI (2017.09~2018.08)
- Evaluation of Computational Core Software for a Simplified Electricity Trading Platform, Taiwan Power Company (Taipower), TPC-0060600003, One-year project, PI (2017.07~2018.06)
- Design of Dynamic Voltage Regulators with Fast Tracking Capability for Multiple Voltage Levels, MOST Research Project, MOST 105-2221-E-006 -178 -MY2-, Two-year project, PI(2016~2018)
- Enhancement of Existing Ancillary Service Estimation Mechanisms and Operational Platforms, Taiwan Power Company (Taipower), TPC-5460300124, Three-year project, Co-PI (2015~2017)
- Application of Pipelined Sharing Technology in Power Management Units (PMU) for Multi-Phase Voltage Regulator Modules (VRM), MOST Research Project, MoST 104-2221-E-006-089 -, One-year project, PI(2015~2016)
- Integrated Design of Integrated Magnetic Gear Motor Drive Systems for Electric Vehicles, MoST 104-2218-E-006-026, Three-year project, Co-PI(2015~2018)
- Benefit and Impact Analysis of Adopting Control Performance Standards (CPS) in Taipower System, Taiwan Power Company (Taipower), TPC-5460300124, PI (2015~2016)
- Integrated Application of Demand Response, Distributed Power Sources, and Energy Storage, MOST Research Project, MOST 104-3113-E-006-007-, Three-year project, Co-PI(2014~2016)
- Industrial-Academic Collaboration Project for Improvement of Power Control and Communication Ports in Industrial Control Systems, MoST 103-2622-E-006-023-CC3, One-year project, PI(2014~2015)
- Research and Development of Integrated Systems for Marine Tidal Current Power Generation, Bureau of Energy, MOEA, G103-B202, Co-PI (2014)
- Development of Digitally Controlled Low-Dropout (LDO) Regulators with Multi-Functional Integrated Power Management ICs, NSC 102-2221-E-006 -099 -MY2, Two-year project, PI(2013~2015)
- Online Simulation and Identification Technology for Generator Set Parameters, Taiwan Power Company (Taipower), TPC-Contract 100-0006, PI (2011~2013)
- Implementation of High-Performance and High-Flexibility Energy Management Systems Using Advanced Energy Storage and Controllable Loads with Wind Power Integration, NSC99-2628-E-006-162, NSC100-2628-E-006-016, Three-year project, PI(2010~2013)
- Establishment of Taiwan Power System Control Performance Standards and Analysis of AGC Control Strategies, Taiwan Power Company (Taipower), TPC-546-2101-9801, PI(2009~2010)
- R&D Project for Offshore Tidal Current Power Generation, 98-D0204-1, Marine Energy Technology Research Center, MOEA, Co-PI (2009~2010)
- System Development and Performance Verification of High-Efficiency Small-to-Medium (10 kW) Wind Turbines, NSC98-3114-E-006-011, NSC101-3113-E-006-003-, Co-PI(2009~2012)
- Realizing Dispatchable Operating Modes for Wind Power - Development of Optimized System Dispatch, Reserve Capacity, and Reliability Analysis, NSC96-2628-E-006-251-MY3, Three-year project, PI(2007~2010)
- Oscillation Test Platform for Low-Power Switching Voltage Regulators and Power Management ICs Realized by Active Filtering and Digital Control, NSC96-2221-E-316-MY2, Two-year project, PI(2007~2009)
- Evaluation of Large-Scale Wind Turbine Frequency Response via State Estimation to Provide Frequency Regulation Operating Strategies, NSC95-2221-E-006-478-, PI(2006~2007)
- Development of Active-Filter-Based Switching Voltage Regulators for System-on-Chip (SoC), NSC95-2221-E-006-479-, PI (2006~2007)
- Development of an EMS Generation Dispatch Simulation System Integrated with Power Market Functions, NSC94-2213-E-006-123-, PI (2005~2006)
- Formulation of Taiwan Power System Frequency Operation Standards, Taiwan Power Company (Taipower), TPC-546-2101-9430, Co-PI(2005)
- Development of an AGC Auxiliary Control Platform and Application of Frequency Response Eigenvalues in Power Ancillary Services, NSC93-2213-E-006-135-, PI(2004~2005)
- Wind-Powered Water Pumping and Cogeneration System, NSC93-2622-E-006-033-cc3, PI(2004~2005)
- Surge and Lightning Protection Measures for Overhead Distribution Line Systems, Taiwan Power Company (Taipower), TPC-546-93-4105-05, Co-PI(2004)
- Research on Improving Operational Performance of Load Frequency Control (LFC), NSC92-2213-E-006-089-, PI (2003~2004)
Classes
Students
Current Academic Year Lab Members
Ph.D.
Chung-Chia Wu
Master
Ren-Ru Huang
Hsuan Liang
Jhih-You Sie
Yu-Chun Huang
Dun-Hsiang Chang
Chih-Peng Pan
Kuo-Lun Chiang
Yi-Hao Chen
Han-Li Hsieh
Lai-Bo Yu
Li-Chen Wang
Jian-De Li
Ting-Yu Chen
Chien-Yu Liao
Liang-Han Huang
En-Kuei Chung
Chen-Feng Liang
Graduates of all Previous Years
Ph.D.
2012
Chun-Hsun Wu
2015
Yien-Cha Chu
2020
Chih-Wei Liu
2022
Hsin-Wei Chiu
Master
2005
Ku-Hsien Lin   Chien-Sheng Luo   Kee-Hsien Li   Yi-Chei Chu   Fan-Chun Sun
2006
Yin-Juin Lin   Hong-Tze Tast   Kuan-Chang Lin   Hsuan-Hung Pau
2007
Fang-Ting Hung   Zhe-Wen Chan   Chih-Min Hung   Chun-Sheng Cheng   Wei-Ming Huang
2008
Shinn-Shyan Wu   Yao-Cing Yin   Mao-Ting Huang   Jhao-Yuen Chen   Yu-Syue Wu
2009
Da-Wei Lin   Wei-Chih Liao   Wei-Ting Lin   Hsiang-Chun Lu
2010
Tse-Jen Tseng   Jing-Yi Huang   Yu-Fu Chou   Chi-Jen Chong   Chung-Wei Chien   Ngoc-An Luu   Chia-Hsuan Kang
2011
Hung-Chean Thong   Zong-Hao Hu   Mei-Ru Lu   Sheng-Han Yang   His-Jui Wang
2012
Wei-Chih Liang   Dante Recalde   Chih-Chau Yang   Zi-An Liu   Chie-Che Sun   Pei-Wei Shie
2013
Chi-Hong Jain   Tai-I Kuo   I-Jen Chen   Kai-Jie Jhang   Ruei-Cheng Shiu
2014
Zhi-Xiang Zhang   Cheng-Jung Hsieh   Bu-Wei Chen   Wei-Gen Chong   Che-Wei Chang   Chai-Jung Lin   Yu-Ju Yen   Kun-Yen Tsai
2015
Xiu-Hua Guo   Chung-Lun Li   Chi-Shiuan Tzeng   Ting-Yu Chen
2016
Jyun-Wei Ho   Fong-Jhih Guo   Chen-Yao Sun   Shang-Yu Yeh   Yu-Hsuan Cheng   Dzulfiqar Rais Mushthafa
2017
Chih-Han Lin   Hao-Yu Ting   Po-Ying Li   Guan-Zhi Tung
2018
Hung-Yu Chen   Yi-Ning Sie   Hung-Chieh Hou   Yu-Lin Lin   Yo-Heng Lee   Bo-Ting Chen   Jian-Hao Su   Chung-You Chang   Wei-Hung Ko
2019
Yu-Lin Chen   Chun-Hsiang Yang   Shih-Hao Ye   Wen-Zeng Li   Cheng-Jui Wen
2020
Che-Yen Yeh   Da-Wei Zheng   Chung-Chia Wu   Jie-Ru Liao   Tsung-Wei Lin   Muhammad Rizaldy
2021
Chun-Chia Chang   Wang-Rong Ni   Tung-Yen Wu   Pei-Jung Yang   Jing-Yao Yen
2022
Yi-Sheng Lin   Chun-Yu Liu   Ying-Ru Lin   Ming-Lun Chuang
2023
I-Chen Tsai   Bo-Hsien Lee   Yu-Hsuan Chen   Trương Đình Minh Đức   Tzu-Chieh Yang   Hong-Min Lin   Hung-Ju Hsu   Ching-Fu Wang    Tzu-Hsuan Huang
2024
Hong-Jhih Jhou   De-Sheng Hsu   Chun-Wei Lin   Hao-Bo Zhang   Chun-Wei Lin   Bo-Xian Huang   Che-Wei Liu   Jia-Ming,Zhang
2025
Yi-Chen Lin   Po-Wen Wang   Chiu-Chun Cheng   Tzu-Chiang Kao   Hui-Ping,Wang   Quoc Trung, Tran
2026
Jin-Guo Huang   Chong-Yi Wong
Honors
- IEEE Tainan Section Outstanding Technical Achievement Award (2025)
- Genesys Logic Thesis Potential Award (2022)
- IEEE Tainan Section Outstanding Technical Achievement Award (2019)
- IEEE Tainan section Delta award (2019)
- Kaohsiung Chapter, Chinese Institute of Electrical Engineering(CIEE) Outstanding Electrical Engineer Award (2013)
- IEEE Senior Member (2012)
- IEEE 2010 Best Gold Member Award, Tainan Section (2010)
- National Cheng Kung University Outstanding Teaching Award (2009)
- Kaohsiung Chapter, Chinese Institute of Electrical Engineering (CIEE) Excellent Electrical Engineer Award (2008)
- Who's who in the world (2007-2009)
- Who's who in Engineering & Science (2006)
- National Science Council (NSC) Outstanding Research Award for Early-Career Scholars in Power Engineering Division (2005)