[논문]미션 프로파일을 고려한 단상 5-레벨 태양광 NPC 인버터의 전력 반도체 소자 수명 분석

류태림; 최의민

doi:10.6113/tkpe.2022.27.3.221

미션 프로파일을 고려한 단상 5-레벨 태양광 NPC 인버터의 전력 반도체 소자 수명 분석
Lifetime Evaluation of Power Devices of Single-Phase 5-Level NPC Inverters Considering Mission Profile of PV Systems 원문보기

전력전자학회 논문지 = The Transactions of the Korean Institute of Power Electronics, v.27 no.3, 2022년, pp.221 - 227

류태림 (Dept. of IT Media Engineering, Seoul National University of Science and Technology) , 최의민 (Dept. of Electronic & IT Media Engineering, Seoul National University of Science and Technology)

Abstract ▼ AI-Helper

The reliability improvement of PV systems is an important factor in reducing the cost of PV energy because it is closely related to the annual energy production as well as the maintenance cost of PV systems. The reliability of PV inverters plays a key role in the reliability of PV systems because it is regarded as one of the most reliable critical parts of PV systems. The lifetime evaluation of PV inverters considering the mission profile in the design phase plays an important role in reliability design to ensure the required lifetime of PV inverters. In this paper, the lifetime of representative single-phase T-type and I-type NPC inverters are comparatively evaluated by considering the mission profile of a PV system recorded at Iza, Spain. Furthermore, the effect of the pulse width modulation methods on the lifetime is also discussed. The lifetime evaluation of PV inverters is performed at the component-level first and then the system level by considering all power devices.

주제어

표/그림 (12)

그림 Fig. 1. Unscheduled maintenance events and costs in PV plant. (a) Unscheduled maintenance events, (b) Unscheduled maintenance costs^[1].
그림 Fig. 2. Single-phase 5-level inverter topologies. (a) I-type NPC, (b) T-type NPC.
그림 Fig. 3. Comparison of reference voltages. (a) UP-PWM, (b) DPWM (θ = 180°).
그림 Fig. 4. Thermal modeling.
그림 Fig. 5. IGBTs and diodes junction temperature of NPC inverters at 20 kHz, 8 kW. (a) T-type NPC with UP-PWM, (b) I-type NPC with UP-PWM, (c) T-type NPC with DPWM (θ = 180°), (d) I-type NPC with DPWM (θ = 180°).
표 TABLE I SIMULATION PARAMETER
그림 Fig. 6. Mission profile in Iza in Spain. (a) Solar irradiation, (b) Ambient temperature.
표 TABLE II THD OF OUTPUT CURRENT AND ACCUMULATED DAMAGES OF POWER DEVICES OF I-TYPE AND T-TYPE NPC INVERTERS IN IZA
그림 Fig. 7. Unreliability functions of the T-type NPC inverter with UP-PWM in Iza in Spain. (a) Power devices, (b) T-type NPC inverter.
그림 Fig. 8. Unreliability functions of the T-type NPC inverter with DPWM (θ = 180°) in Iza in Spain. (a) Power devices, (b) T-type NPC inverter.
그림 Fig. 9. Unreliability functions of the I-type NPC inverter with UP-PWM in Iza in Spain. (a) Power devices, (b) I-type NPC inverter.
표 TABLE III B₁ AND B₁₀ LIFETIMES OF I-TYPE AND T-TYPE NPC INVERTERS IN IZA

참고문헌 (9)

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상세보기
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