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

Abstract

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

CLC Number:

TP211+.4

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.

Figures/Tables 16

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References 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	×-	+

Research on Improved Dual Switch Table Direct Power Control Strategy

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电网电压扇区	S_p	S_q	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
π/6≤θ≤π/3	-1	1	2	2	2	3	3	3	4	4	4	5	5	5	6	6	6	1	1	1
	-1	0	1	1	1	2	2	2	3	3	3	4	4	4	5	5	5	6	6	6
	0	1	4	4	4	5	5	5	6	6	6	1	1	1	2	2	2	3	3	3
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	1	1	4	4	4	5	5	5	6	6	6	1	1	1	2	2	2	3	3	3
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电网电压扇区	S_p	S_q	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
π/6≤θ≤π/3	-1	1	2	2	2	3	3	3	4	4	4	5	5	5	6	6	6	1	1	1
	-1	0	1	1	1	2	2	2	3	3	3	4	4	4	5	5	5	6	6	6
	0	1	3	3	3	4	4	4	5	5	5	6	6	6	1	1	1	2	2	2
	0	0	6	6	6	1	1	1	2	2	2	3	3	3	4	4	4	5	5	5
	1	1	3	3	3	4	4	4	5	5	5	6	6	6	1	1	1	2	2	2
	1	0	6	6	6	1	1	1	2	2	2	3	3	3	4	4	4	5	5	5