Two-vectors-based Model Prediction Direct Power Control of Current Source PWM Rectifier

doi:10.11985/2024.01.023

Abstract

Abstract:

Current source pulse width modulation(PWM) rectifier is difficult to control because of LC filter in its network side. The power waveform of rectifier based the traditional direct power control is pulsatile. Model predictive direct power control(MPDPC) is adopted to improve the traditional control strategy because of its excellent dynamic performances and intuitive control law. Firstly, the mathematical model of three-phase PWM rectifier is established, the power change rate in each sampling period is given, and the power relationship between adjacent sampling periods is derived. Then, single-vector-based model predictive direct power control strategy is given, and two-vectors-based model predictive direct power control strategy is proposed. The two current vectors are optimized, and the acting time in one sampling period is calculated and corrected. Finally, the feasibility and effectiveness of the proposed control strategy are verified by Matlab/Simulink.

Key words: Current source rectifier, model predictive control, two-vectors, power control

CLC Number:

TM46

WANG Sen, YANG Yi, GUO Qiang, MA Wen, HUANG Yongjun. Two-vectors-based Model Prediction Direct Power Control of Current Source PWM Rectifier[J]. Journal of Electrical Engineering, 2024, 19(1): 216-225.

Figures/Tables 13

References 20

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三值逻辑函数 σ_aσ_bσ_c	调制系数		电流矢量序号I_z
三值逻辑函数 σ_aσ_bσ_c	m_rα	m_rβ	电流矢量序号I_z
1 0 -1	1	${\sqrt{\text{3}}}/{\text{3}}\;$	I₁
0 1 -1	0	${\text{2}\sqrt{\text{3}}}/{\text{3}}\;$	I₂
-1 1 0	-1	${\sqrt{\text{3}}}/{\text{3}}\;$	I₃
-1 0 1	-1	-${\text{2}\sqrt{\text{3}}}/{\text{3}}\;$	I₄
0 -1 1	0	-${\sqrt{\text{3}}}/{\text{3}}\;$	I₅
1 -1 0	1	-${\sqrt{\text{3}}}/{\text{3}}\;$	I₆
0 0 0	0	0	I₇
	0	0	I₈
	0	0	I₉

参数	数值
电网频率/Hz	50
电网电压有效值/V	220
直流侧输出电压/V	400
开关频率/kHz	16
滤波电感L_f/mH	0.5
滤波电容C_ac/μF	12
虚拟电阻R₃/Ω	5
直流侧电感L_dc/mH	4.5
直流侧电容C_dc/μF	120
负载R_L/Ω	20,40
控制器比例系数P	1.5
控制器比例系数I	200

参数变化	DPC	单矢量 MPDPC	双矢量 MPDPC
网侧有功功率纹波p_r/W	1 000	660	440
网侧无功功率纹波q_r/Var	1 200	600	420