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AC/DC整流器并联均流新型下垂控制策略 被引量:4
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作者 李文善 温旭辉 张剑 《电机与控制学报》 EI CSCD 北大核心 2020年第7期62-72,共11页
为降低传统下垂控制造成的母线电压衰减,提出一种基于AC/DC整流器等效阻抗差的改进型下垂控制策略,并应用于解决中小型运载器的发供电系统均流问题。分析了AC/DC整流器的dq轴模型及其等效电路,并据此给出等效阻抗计算式。在确定并联整... 为降低传统下垂控制造成的母线电压衰减,提出一种基于AC/DC整流器等效阻抗差的改进型下垂控制策略,并应用于解决中小型运载器的发供电系统均流问题。分析了AC/DC整流器的dq轴模型及其等效电路,并据此给出等效阻抗计算式。在确定并联整流器的等效阻抗相对关系的前提下,建立AC/DC整流器输出电流差和电压差之间的数学模型,并以此为基础,针对等效阻抗较大的整流器设计下垂控制器。为验证所提策略的有效性,建立了永磁同步发电机—整流器并联系统的仿真模型和实验平台。仿真分析了等效阻抗和控制参数对均流性能的影响。仿真和实验结果表明,基于整流器等效阻抗差的下垂控制能够在降低母线电压衰减的基础上实现均流,该方法尤其适合高压小电流的AC/DC整流系统。 展开更多
关键词 AC/DC整流器 均流 下垂控制 母线电压衰减 等效阻抗差
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A fractional-order multifunctional n-step honeycomb RLC circuit network 被引量:2
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作者 Ling ZHOU Zhi-zhong TAN Qing-hua ZHANG 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2017年第8期1186-1196,共11页
We investigate a multifunctional n-step honeycomb network which has not been studied before. By adjusting the circuit parameters, such a network can be transformed into several different networks with a variety of fun... We investigate a multifunctional n-step honeycomb network which has not been studied before. By adjusting the circuit parameters, such a network can be transformed into several different networks with a variety of functions, such as a regular ladder network and a triangular network. We derive two new formulae for equivalent resistance in the resistor network and equivalent impedance in the LC network, which are in the fractional-order domain. First, we simplify the complex network into a simple equivalent model. Second, using Kirchhoff's laws, we establish a fractional difference equation. Third, we construct an equivalent transformation method to obtain a general solution for the nonlinear differential equation. In practical applications, several interesting special results are obtained. In particular, an n-step impedance LC network is discussed and many new char- acteristics of complex impedance have been found. 展开更多
关键词 Honeycomb network Equivalent transformation Fractional differential equation Impedance characteristics
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