Z-소스 인버터를 이용한 계통연계형 PV 시스템용 PCS 설계 = Design of PCS for Grid-Connected PV System using Z-source Inverter

다국어 초록 (Multilingual Abstract)

This research gives the analysis and design for grid-connected PV system using Z-source inverter.
Instead of the traditional inverter, such as voltage source or current source, this research use the Z-source inverter with the low frequency transformer type.
The PLL control for detection of source voltage information, the ac current control algorithm for grid side, the current control algorithm for MPPT by shoot-through time and the voltage control algorithm for dc link voltage. Through the simulation, we conformed the algorithms work well with excellent characteristics.
The energy form solar cell is heavily dependent on the environment such as radiation and temperature.
The MPPT control is required to extract maximum energy from solar cell. In this paper, the MPPT technique using the perturbation and observation method(P&O) and shoot-through time of Z-source inverter.
The Z-source inverter has bed current condition for MPPT of PV-array.
And we have to control the Z-source input current continuously. we can overcome this adding the LC filter.
This paper constructed the PCS for PV system and analysis of the high efficient and reliable control algorithm for the construction of Z-source inverter.

목차 (Table of Contents)

• 목차
• 1. 서론 = 1
• 2. 인버터 토폴로지 비교 = 3
• 2-1. 전압원 인버터 = 3
• 2-2. 전류원 인버터 = 4
• 2-3. Z-소스 인버터 = 5
• 3. Z-소스 인버터의 동작모드 해석 = 7
• 3-1. 암 단락 모드와 활성모드 = 7
• 3-1-1. 전압관계 = 7
• 3-1-2. 전류관계 = 9
• 3-2. 관계식 유도 = 11
• 4. Z-소스를 이용한 PCS 설계 알고리즘 = 14
• 4-1. 전체시스템 구성 = 14
• 4-2. 인버터 제어부 = 17
• 4-2-1. 선간전압 = 17
• 4-2-2. 전류지령 = 18
• 4-2-3. 출력 전류제어 = 20
• 4-2-4. 직류 링크 전압 = 20
• 4-3. Z-소스 네트워크 = 21
• 4-3-1. PV-어레이 특성 = 22
• 4-3-2. MPPT 제어와 Vp, Vn = 24
• 4-4. PWM = 27
• 5. 모의 실험 = 29
• 5-1. 인버터 = 29
• 5-2. PV-어레이 = 34
• 5-3. MPPT와 Vp, Vn = 36
• 5-4. 전체 = 40
• 6. 결론 = 48
• 참고 문헌 = 50
• 영문 초록 = 52