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Research and Design about Static Synchronous Compensator Based on Asymmetrical 3H Multilevel Inverter

Author: ZhengYaoShan
Tutor: ChenJinCao
School: Nanjing University of Technology and Engineering
Course: Power Electronics and Power Drives
Keywords: Asymmetric 3H bridge Reactive power compensation Segment cascading PWM ARM
CLC: TM761.1
Type: Master's thesis
Year: 2010
Downloads: 139
Quote: 1
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Abstract


With the development of the multi - level , multi- level inverter main circuit STATCOM shows its superiority to get more and more attention . Asymmetric multi- level topology using fewer devices can output more level characteristics , reactive power compensation studies , and has a very important significance . The proposed asymmetric 3H bridge multilevel inverter topology , works asymmetric 3H bridge multi -level inverter control method applied to the main circuit reactive power compensation , designed based on the asymmetric 3H bridge multilevel still level inverter reactive power compensation . The theoretical aspects of the STATCOM works , studied the STATCOM current indirect control method and the single-phase instantaneous reactive current detection method . Asymmetric multi - level topology works , focusing on the asymmetric 3H bridge works . Asymmetric the segmented stack carrier PWM control 3H bridge method , and improved control method . The simulation software SIMPLORER effect based on asymmetric the 3H ??Bridge multi- level inverter STATCOM simulation study simulation results show that the asymmetric 3H bridge multi- level STATCOM output voltage waveform quality is good to be able to achieve better compensation Reactive . Complete asymmetric 3H bridge multilevel STATCOM hardware and software design . Terms of hardware , the design of the main circuit , detection circuit , a control circuit , PWM generation circuit and driver circuit , control circuit using two ARM7 chip , dual-port RAM communication between . Software , the design of the A / D sampling procedure , and calculating the reactive current program , the communication program , the digital PI program , and outputs a modulated wave control signal routine . Produced in the hardware design and software design based on single-phase asymmetric 3H bridge multilevel STATCOM prototype, respectively, in the case of inductive load , capacitive load and load mutation , reactive power compensation experiment . The experimental results indicate that the design of STATCOM prototype has a good compensation effect in different conditions , reflected in the output waveform quality advantages of a multi-level .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Automatically adjusts > Automatic adjustment of voltage and reactive power
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