Research on Sliding Mode and Passivity Based Control Strategy of Active Power Filter

doi:10.12096/j.2096-4528.pgt.21132

Abstract

Abstract:

In order to improve the compensation performance and harmonic suppression ability of active power filter (APF), the SMC-PBC strategy with reaching law sliding mode control (SMC) in voltage outer loop and passivity based control (PBC) in current inner loop was proposed. Compared with the PI-PBC strategy combining proportion integration (PI) and PBC, the PI-HCC strategy combining PI and hysteresis current control (HCC), SMC-PBC strategy can make the compensated current of APF closer to sine wave when load changes. The simulation results of MATLAB/Simulink experimental platform show that the SMC-PBC strategy is effective and feasible.

Key words: power electronics, active power filter (APF), passivity based control (PBC), sliding mode control (SMC), harmonic suppression

CLC Number:

TM 761

Jinchang LIU, Jiuhe WANG, Dongxue CHEN. Research on Sliding Mode and Passivity Based Control Strategy of Active Power Filter[J]. Power Generation Technology, 2023, 44(2): 280-286.

Figures/Tables 12

Fig. 1 Topology diagram of APF

Fig. 2 SMC control schematic diagram of DC side voltage

Fig. 3 SMC-PBC control schematic diagram of APF

Tab. 1 APF simulation circuit parameters

电路参数	数值
三相电网电压有效值/V	220
滤波电感器输入阻抗R/Ω	0.01
滤波电感器输入电感L/H	0.01
直流侧储能电容C/μF	3 000
直流侧电容电压期望值 $u d c *$ /V	750
开关频率/kHz	10
不控整流电路电阻负载R₁/Ω	10
不控整流电路电感负载L₁/mH	5
滑模控制器参数c₁， c₂	10
滑模控制器参数k	410
滑模控制器参数 $ε$	3.5
滑模控制器参数A	1

Tab. 1 APF simulation circuit parameters

电路参数	数值
三相电网电压有效值/V	220
滤波电感器输入阻抗R/Ω	0.01
滤波电感器输入电感L/H	0.01
直流侧储能电容C/μF	3 000
直流侧电容电压期望值 $u d c *$ /V	750
开关频率/kHz	10
不控整流电路电阻负载R₁/Ω	10
不控整流电路电感负载L₁/mH	5
滑模控制器参数c₁， c₂	10
滑模控制器参数k	410
滑模控制器参数 $ε$	3.5
滑模控制器参数A	1

Fig. 4 Capacitor voltage waveform on DC side of APF

Fig. 5 Current compensation waveform of SMC-PBC power grid at double load

Fig. 6 Current compensation waveform of PI-PBC power grid at double load

Fig. 7 Current compensation waveform of PI-HCC at double load

Fig. 8 Current compensation waveform of SMC-PBC power grid at 1 times load

Fig. 9 Current compensation waveform of PI-PBC power grid at 1 times load

Fig. 10 Current compensation waveform of PI-HCC at 1 times load

Tab. 2 THD under different load conditions

控制策略	未并联负载	并联负载后
SMC-PBC	2.01	1.17
PI-PBC	2.82	1.79
PI-HCC	2.90	3.69

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