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变压器式可控电抗器的单绕组调节模式及谐波电流优化

ISSN号：1006-6047
期刊名称：电力自动化设备
时间：2015.8
页码：74-82
分类：TM554[电气工程—电器]
作者机构：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070
相关基金：国家自然科学基金资助项目（51167009,51367010）;甘肃省科技计划资助项目（1304WCGA181）;兰州市科技计划资助项目（2013-4-111）
相关项目：变压器式可控电抗器磁集成与解耦控制研究

关键词：变压器式可控电抗器, 单绕组调节模式, 调节过程, 容量区间, 谐波分析, 优化, controllable reactor of transformer type, single-winding regulating mode, regulating process, output power range, harmonic analysis, optimization

中文摘要：

在变压器式可控电抗器（CRT）运行时的任一确定工况下,合理地选择短路与调节控制绕组可有效减小CRT向电网注入的谐波电流含量。为此,给出CRT单绕组调节模式的明确定义,通过求解CRT的自、互电感电路方程,得到工作绕组瞬时电流的分段表达式,并推出工作绕组电流基波及各次谐波分量有效值的计算公式;引入调节过程及容量区间等概念,给出了CRT单绕组调节模式的通用分析方法;在此基础上,对所有适合给定输出功率的调节过程进行筛选比较,得到使CRT对电网造成的谐波污染达到最小的调节过程及相应调节控制绕组的触发角,实现了单绕组调节模式下CRT的谐波电流优化。分析和算例结果说明CRT的任意一个单绕组调节模式均可看作是若干个特定调节过程的一个排列;与已有的3种单绕组调节模式进行对比,说明所给谐波电流优化方法是有效的。

英文摘要：

Properly selecting the short-circuit and regulating control windings of CRT（Controllable Reactor of Transformer type） operating in a certain working status can effectively reduce its harmonic current injecting into power system. A clear definition is provided for the single-winding regulating mode of CRT,the piecewise instantaneous current expressions of work winding is obtained and the RMS calculation formula for ttle fundamental and harmonic currents of operating winding are deduced by solving the self and mutual inductance circuit equations. The concepts of regulating process and output power range are introduced and the general analysis method of CRT single-winding regulating mode is given. All the regulating processes suitable for the given output power are sorted and compared to obtain the regulating process with the slightest harmonic pollution to power system and the triggering angle of corresponding regulating control winding. The harmonic currents injected into power system by CRT in single-winding regulating mode are thus optimized. The results of analysis and case study show that any single-winding regulating mode of CRT can be regarded as a permutation consisting of several certain regulating processes. The comparison with existing three single-winding regulating modes indicates that the proposed method is efficient.

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