Outline
- I Introduction
- II Topology and Model of the Dvr
- III Control System
- IV Parameter Design
- V Simulation Results
- VI Conclusion
رئوس مطالب
- 1. مقدمه
- 2. توپولوژی و مدل DVR
- A: مبدل PWM سری
- B: چاپر DC
- 3. سیستم کنترل
- A: کنترل جبرانسازی ولتاژ
- B: کنترل مبدل سری
- C: کنترل چاپر DC
- 4. طراحی پارامتر
- 5. نتایج شبیه سازی
- 6. نتیجه گیری
Abstract
This paper presents a superconducting magnetic energy storage (SMES) based dynamic voltage restorer (DVR) to protect consumers from the grid voltage fluctuations. Due to the characteristic of high energy density and quick response, a superconducting magnet is selected as the energy storage unit to improve the compensation capability of DVR. This paper analyses the operation principle of the SMES based DVR, and designs the DVR output voltage control method. The control system mainly consists of two parts, the PWM converter controller and the DC/DC chopper controller. The PWM converter controller adopts double-loop control strategy, with an inner current regulator and an outer voltage controller. Combining the coordinated control of DC/DC chopper, the DVR can regulate output voltage accurately and quickly to compensate the system voltage fluctuations. Using MATLAB SIMULINK, the models of the SMES based DVR is established, and the simulation tests are performed to evaluate the system performance.
Keywords: DVR - series PWM converter - SMEs - voltage fluctuation compensationConclusions
This paper presents the SMES based DVR to compensate voltage fluctuations. It can compensate long term voltage fluctuation. Based on the mathematical model of the DVR system, the control topology and algorithm are designed. Simulation results illustrate that the superconducting magnet can effectively increase the compensation capability of DVR, compared to the compensation performance by a DC capacitor.