Abstract：Due to the characteristics of transmission line, devices’ half-controllability, and load circuits, over voltage, over current and voltage and current surge often occur at the moment of turn-on and shut-off in three-phase AC thyristor voltage regulators. RC snubber circuits are able to suppress such surges, the coefficients of which may influence energy loss. In order to solve the problems of optimal coefficients’ configuration, this paper studies the output characteristics of a thyristor in one on period based on time-domain modeling, according to the model with snubber circuit, and establishes the power loss index and mathematical descriptions of impact’s constraint conditions to system. The idea is proposed of achieving energy saving and surges’ suppressions by optimizing power loss index as well as determining snubber circuit’s parameters taking surges as constraint conditions, and it is realized by means of MATLAB. Simulation curves and actual waveforms indicate the result of suppression to surges and energy conservation is obvious, which verifies the effectiveness of such designs.
李凯, 袁峰, 丁振良. 基于时间域建模的晶闸管调压装置缓冲电路设计[J]. 电工技术学报, 2012, 27(1): 196-201.
Li Kai, Yuan Feng, Ding Zhenliang. Research and Design on Snubber Circuits of Thyristor Voltage Regulator Based on Time-Domain Modeling. Transactions of China Electrotechnical Society, 2012, 27(1): 196-201.
[1] 蓝元良, 汤广福, 印永华. 串联晶闸管反向恢复暂态过程研究[J]. 电网技术, 2006, 30(16): 15-19. [2] 王毅, 石新春, 李和明, 等. 基于统一离散时域建模法的晶闸管串联运行暂态仿真[J]. 电力系统自动化, 2004, 28(18): 41-44. Wang Yi, Shi Xinchun, Li Heming, et al. Cascaded thyristors simulation based on unified discrete time-domain modeling[J]. Automation of Electric Power Systems, 2004, 28(18): 41-44. [3] Minseok Joo. Losses of thyristor on modified bridge type high-temperature superconducting fault current limiter[J]. IEEE Transactions on Applied Supercon- ductivity, 2004, 14(2): 835-838. [4] 王榕生. 基于交流电机负载双向晶闸管关断电压暂态研究及缓冲电路参数优化[J]. 福州大学学报, 2007, 35(2): 234-240. Wang Rongsheng. A study of transient state on triac off-state voltage and optimization of parameters of snubber circuit for 3-phase induction motors switching application[J]. Journal of Fuzhou University, 2007, 35(2): 234-240. [5] 张冬霞, 童陆园, 尹忠东, 等. 描述可控串补装置暂态特性的数学模型[J]. 中国电机工程学报, 1999, 19(5): 30-34. Zhang Dongxia, Tong Luyuan, Yin Zhongdong, et al. Analytical mathematical model for describing the dynamic behavior of the thyristor controlled series compensator[J]. Proceedings of the CSEE, 1999, 19(5): 30-34. [6] 葛俊, 童陆园, 耿俊成. 基于电容电压同步下TCSC暂态特性的数学描述[J]. 中国电机工程学报, 2001, 21(3): 1-5. Ge Jun, Tong Luyuan, Geng Juncheng. The mathematical model for describing transient characteristics of TCSC based on capacitor voltage synchronization mode[J]. Proceedings of the CSEE, 2001, 21(3): 1-5. [7] Donlon John F, Motto Eric R, Yamamoto M, et al. A new gate commutated turn-off thyristor and companion diode for high power applications[C]. Proceedings fo the IEEE Industry Applications Society Annual Meeting, 1998: 1-8. [8] Cardoso Filho Braz J, Lipo Thomas A. Application of MTO-thyristors in current stiff converters with resonant snubbers[C]. Proceedings fo the IEEE Industry Applications Conference, 1999: 1-8. [9] Astrom U, Danielsson B, Nyberg K. Alternative solutions for thyristor control and gating for HVDC-valves[C]. Proceedings fo the IEEE Power System Technology 1998: 1-4. [10] 汤涌.交直流电力系统多时间尺度全过程仿真和建模研究新进展[J]. 电网技术, 2009, 33(16):1-8. 作者简介:李凯 男, 1979年生, 博士, 讲师, 研究方向为运动控制系统测试分析、惯性精密测量和数字图像处理。袁峰 男, 1963年生, 博士, 教授, 博士生导师, 研究方向为光电测试技术、高速图像处理和惯性设备测试。
2012, Vol. 27 
