直接功率控制中的矢量表理论和实验研究

摘要/Abstract

摘要：

基于矢量表的直接功率控制由于其结构简单、动态响应快、参数鲁棒性好和无需电流内环整定等优点而得到了国内外学者的广泛关注。开关矢量表的建立是直接功率控制中的核心研究内容,目前文献中已经出现了各种各样的矢量表,但在扇区划分和矢量选择上并不统一,对矢量表建立的内部机理也阐述的比较模糊。因此,有必要对矢量表的建立机理进行详细的分析,研究众多矢量表方案的联系和区别并对它们各自的性能进行比较。本文采用数学推导和几何图示的方法对直接功率控制中矢量表建立的机理进行了详细研究,分析得出了六种可行的矢量表,其中三种已经在现有文献中有报道,而另外三种尚未见诸文献。本文以六种矢量表中两种矢量表为例进行了仿真和实验研究,二者均可实现有功和无功的解耦控制,而且具有相似的动态响应,但稳态性能有所差异。仿真和实验结果验证了本文的矢量表建立理论的有效性。

关键词: 直接功率控制, 矢量表, 机理分析

Abstract:

Direct power control (DPC) is attracting wide attention throughout the world due to its merits of simple structure, quick dynamic response, strong robustness against parameter variations and no need of inner current loop tuning work. The establishment of switching table is the key aspect of DPC and so far there are various switching tables in the literature. However, they differ in the sector division and vector selection and the explanation of switching table establishment is not clear. Hence, it is necessary to give a detailed study of the establishment of switching table and compare the performance of various switching tables. This paper gives a detailed analysis on the mechanism of switching table using mathematical derivation and geometry illustration. Six feasible switching tables are obtained, of which three have been reported in the literature while other three are not. This paper studies two of the six switching tables using simulations and experimental tests. Both methods can achieve decoupled control of active power and reactive power, quick dynamic responses while they are different in steady state performance. The presented simulation and experimental results validate the effectiveness of the theory of switching table establishment.

Key words: Direct power control, switching table, mechanism analysis

中图分类号:

TM351

张永昌,彭玉宾,曲昌琦. 直接功率控制中的矢量表理论和实验研究[J]. 电气工程学报, 2015, 10(6): 19-26.

Zhang Yongchang,Peng Yubin,Qu Changqi. Switching Table Theory and Experimental Study of Direct Power Control[J]. Journal of Electrical Engineering, 2015, 10(6): 19-26.

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Δp	Δq	扇区1
增加	增加	V₀ V₇ V₃ V₄
增加	减少	V₅ V₆
减少	增加	V₂
减少	减少	V₁

Δp	Δq	扇区k
增加	增加	V₀V₇ V_k₊₂ V_k₊₃
增加	减少	V_k_-2 V_k_-1
减少	增加	V_k₊₁
减少	减少	V_k

Δp	Δq	扇区k
增加	增加	V₀V₇
增加	减少	V_k_-1
减少	增加	V_k₊₁
减少	减少	V_k

Δp	Δq	扇区k
增加	增加	V_k₊₃
增加	减少	V_k_-1
减少	增加	V_k₊₁
减少	减少	V_k

Δp	Δq	扇区k
增加	增加	V_k₊₂
增加	减少	V_k_-2
减少	增加	V_k₊₁
减少	减少	V_k