改进双开关表直接功率控制策略的研究

doi:10.16180/j.cnki.issn1007-7820.2019.05.012

摘要/Abstract

摘要：

为了有效解决电压型三相PWM整流器的动态扇区直接功率控制策略在输入功率与指定功率之间存在较大差异的问题,文中研究了一种新型双开关表DPC调节机制。通过引进三状态滞环比较器,形成了一个新的功率幅度控制函数。系统根据功率幅度控制函数和三状态滞环比较器的输出值来选择开关表和开关矢量,以使整流器能够根据实时的功率差额选择合适的开关矢量。最后通过与传统动态扇区DPC策略的MATLAB/Simulink仿真对比,证明双开关表DPC策略可以有效改善直流侧输出电压特性并减小无功功率纹波。

关键词: 直接功率控制, 双开关表, 三状态滞环比较器, 功率幅度控制函数, 输出电压特性, 无功功率纹波

Abstract:

In order to effectively solve the problem that the dynamic sector direct power control strategy of the voltage type three-phase PWM rectifier has a large difference between the input power and the specified power, a new double switch DPC regulation mechanism was studied in this paper. By introducing a three state hysteresis comparator, a new power amplitude control function was formed. The switch table and the switch vector were selected by the system according to the power amplitude control function and the output value of the three state hysteresis comparator, so that the rectifier could choose the appropriate switch vector based on the real time power difference. Finally, compared with the MATLAB/Simulink simulation of the traditional dynamic sector DPC strategy, the double switch DPC strategy could effectively improve the DC side output voltage characteristics and reduced the reactive power ripple.

Key words: direct power control, dual switch table, three state hysteresis comparator, power amplitude control function, output voltage characteristics, reactive power ripple

中图分类号:

TP211+.4

胡会智,吉培荣,张赟宁,吴张傲. 改进双开关表直接功率控制策略的研究[J]. 电子科技, 2019, 32(5): 62-67.

HU Huizhi,JI Peirong,ZHANG Yunning,WU Zhang’ao. Research on Improved Dual Switch Table Direct Power Control Strategy[J]. Electronic Science and Technology, 2019, 32(5): 62-67.

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参考文献 16

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扇区	0≤θ≤π/6	π/6≤θ≤π/3	π/3≤θ≤π/2
1	0θ	0π/3-θ	0θ-π/3
2	θπ/3-θ	π/3-θθ	θ-π/32π/3-θ
3	π/3-θπ/3	θπ/3	2π/3-θπ/3
?	?	?	?
17	5π/3+θ2π-θ	2π-θ5π/3+θ	4π/3+θ7π/3-θ
18	2π-θ2π	5π/3+θ2π	7π/3-θ2π

功率	V₁	V₂	V₃	V₄	V₅	V₆
P	-	++	++++	+++++	+++	+
Q	+	+++	++	-	---	--
注:上述表格中“+”表明开关矢量在扇区中是增加功率的,“+”越多表明增加的越快;“-”表明开关矢量在扇区中是减小功率的,“-”越多表明减小的越快,其他扇区的情况可由第一扇区的情况类推。

S_p	D_p
S_p	0	1	2
-1	+	×	×
0	+	-	×
1	×-	+