Jin_Hyuk Park and Kyo-Beum Lee, "Improved DPWM Scheme for Improvement of Grid Current Quality in a Large-Scale Grid-Connected Inverter System with a LCL-Filter," in Proc. CENCON Conf., Oct. 2015, pp. 343–348. > Paper

Paper

International Conference Jin_Hyuk Park and Kyo-Beum Lee, "Improved DPWM Scheme for Improvement of Grid Current Quality in a Large-Scale Grid-Connected Inverter System with a LCL-Filter," in Proc. CENCON Conf., Oct. 2015, pp. 343–348.

2015

본문

This paper proposes an improved discontinuous PWM (DPWM) method in a grid-connected inverter system. When the conventional

60° DPWM is used in the switching method, the output voltage of the inverter has many harmonics compared to the continuous

PWM (CPWM) switching method. In large-scale system, a LCL-filter cannot sufficiency reduce the harmonics of the inverter output

voltage. If these harmonics and the resonance frequency band caused by a grid-connected LCL-filter are overlapped, the grid current

oscillates. To solve this problem, the proposed method continuously changes the discontinuous modulation signal by injecting

triangular wave to modulation signal. The proposed algorithm can reduce the harmonics of inverter output voltage. The proposed

DPWM is verified from PSIM simulation with a 600-kW 2-level grid-connected inverter system.

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Paper 목록
번호	년도	논문명
열람중	2015	International Conference Jin_Hyuk Park and Kyo-Beum Lee, "Improved DPWM Scheme for Improvement of Grid Current Quality in a Large-Scale Grid-Connected Inverter System with a LCL-Filter," in Proc. CENCON Conf., Oct. 2015, pp. 343–348.
91	2015	International Conference Hye-Ung Shin and Kyo-Beum Lee, "Fault-Tolerant Switched Reluctance Machine Drives Using a Current Park's Vector," in Proc. CENCON Conf., Oct. 2015, pp. 19–24.
90	2015	International Conference Yeongsu Bak, Yongsoo Cho, and Kyo-Beum Lee, "Reverse Matrix Converter for Permanent Magnet Synchronous Motor Drives using a Direct Power Control," in Proc. ECCE Conf., Sep. 2015, pp. 6832–6837.
89	2015	International Conference Seung-Joo Lee, June-Seok Lee, and Kyo-Beum Lee, "High-Efficiency Switching Strategy and Neutral-Point Voltage Control in Single-Phase Three-Level Inverter," in Proc. ECCE Conf., Sep. 2015, pp. 6393–6398.
88	2015	International Conference Yeongsu Bak, Eunsil Lee, Yongsoo Cho, and Kyo-Beum Lee, "Constant Speed Control for a Reverse Matrix Converter under Variable Input Conditions," in Proc. ECCE Conf., Sep. 2015, pp. 5924–5929.
87	2015	International Conference Hye-Ung Shin and Kyo-Beum Lee, "Optimal Design of a Switched Reluctance Generator for Small Wind Power System using a Genetic Algorithm," in Proc. ICPE (ECCE-Asia) Conf., Jun. 2015, pp. 2209–2214.
86	2015	International Conference Seok-Min Kim, June-Seok Lee, and Kyo-Beum Lee, "Fault-Tolerant Strategy using Neutral-Shift Method for Cascaded Multilevel Inverters Based on Level-Shifted PWM," in Proc. ICPE (ECCE-Asia) Conf., Jun. 2015, pp. 1327–1332.
85	2015	International Conference Seungjong Yoo, June-Seok Lee, and Kyo-Beum Lee, "A New Discontinuous PWM Method of Three-Level Inverter for Neutral-Point Voltage Ripple Reduction," in Proc. ICPE (ECCE-Asia) Conf., Jun. 2015, pp. 521–526.
84	2015	International Conference Ui-Min Choi, Frede Blaabjerg, June-Seok Lee, and Kyo-Beum Lee, "Open-Circuit Fault Diagnosis for a Grid-connected NPC Inverter with Unity Power Factor," in Proc. APEC Conf., Mar. 2015, pp. 213–220.
83	2015	International Conference June-Seok Lee and Kyo-Beum Lee, "Fault Tolerance Control for Outer Switches of a 3-Level Rectifier in Wind Turbin Systems," in Proc. APEC Conf., Mar. 2015, pp. 1318–1323.
82	2014	International Conference June-Seok Lee, Hyun-Woo Sim, and Kyo-Beum Lee, "Cascaded H-bridge Multilevel Inverter for Increasing Output Voltage Levels," in Proc. CENCON Conf., Oct. 2014, pp. 365–370.
81	2014	International Conference Dae-Keun Choi, Sang-Ho Moon, and Kyo-Beum Lee, "An Open-Switch Fault Detection Method and Tolerance Controls Based on MPDPC in a NPC Rectifier," in Proc. CENCON Conf., Oct. 2014, pp. 354–359.
80	2014	International Conference Seung-Joo Lee, June-Seok Lee, and Kyo-Beum Lee, "Novel Switching Strategy for High-Efficiency of Single-Phase Three-level Inverters," in Proc. CENCON Conf., Oct. 2014, pp. 342–347.
79	2014	International Conference June-Seok Lee, Sang-Ho Moon, and Kyo-Beum Lee, "Performance Improvement of Neutral-Point Voltage Balancing for Energy Storage System using DC/DC Converter," in Proc. CENCON Conf., Oct. 2014, pp. 336–341.
78	2014	International Conference Yeongsu Bak, Eunsil Lee, and Kyo-Beum Lee, "An Indirect Matrix Converter for Dual Output AC Drive System With Reduced Number of Power Transistors," in Proc. CENCON Conf., Oct. 2014, pp. 360–364.

Paper 목록

번호

년도

논문명

열람중

2015

International Conference

Jin_Hyuk Park and Kyo-Beum Lee, "Improved DPWM Scheme for Improvement of Grid Current Quality in a Large-Scale Grid-Connected Inverter System with a LCL-Filter," in Proc. CENCON Conf., Oct. 2015, pp. 343–348.

2015

International Conference

Hye-Ung Shin and Kyo-Beum Lee, "Fault-Tolerant Switched Reluctance Machine Drives Using a Current Park's Vector," in Proc. CENCON Conf., Oct. 2015, pp. 19–24.

2015