Active power filter control system based on three-level TNPC

A power filter and control system technology, applied in active power filtering, electrical components, output power conversion devices, etc., can solve the problems of lack of stability, high harmonic content, and easy overshoot in the system, and achieve improved Anti-jamming ability, cost reduction, effect of alleviating overshoot

Pending Publication Date: 2022-04-26
XIAN AERONAUTICAL POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The converter in the active power filter adopts two levels, and the harmonic content is high during the operation process, which is easy to generate heat, resulting in low efficiency
[0005] (2) The voltage outer loop control, that is, the DC side control is mainly based on the classic PI control, which is prone to overshoot and impacts the system
[0006] (3) The current inner loop control is mainly based on PI control, feedback linearization control, and synovial film control. When the load changes suddenly or the system has disturbances, the system lacks stability.

Method used

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  • Active power filter control system based on three-level TNPC
  • Active power filter control system based on three-level TNPC
  • Active power filter control system based on three-level TNPC

Examples

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Embodiment

[0064] Example: such as figure 1As shown, a control system based on a three-level TNPC type active power filter includes an APF, and the APF includes a nonlinear load and a converter connected in parallel on the power supply. The converter is a three-level TNPC type converter. The converter includes a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm, a fifth bridge arm and a sixth bridge arm connected in parallel to the three-phase three bridge arms of the power supply, and the first bridge arm includes IGBT switch tubes Ta1 and Ta4 connected in series, the second bridge arm includes series connected IGBT switch tubes Tb1 and Tb4, the third bridge arm includes series connected IGBT switch tubes Tc1 and Tc4, and the fourth bridge arm includes series connected IGBT switch tubes Ta3 and Ta2 , the fifth bridge arm includes series-connected IGBT switch tubes Tb3 and Tb2, the sixth bridge arm includes series-connected IGBT switch tubes Tc3 and Tc2, and ...

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Abstract

The invention discloses a three-level TNPC type active power filter control system, which comprises an APF, and is characterized in that the APF comprises a nonlinear load and a converter which are connected to a power supply in parallel, and the APF further comprises voltage outer loop passive control and current inner loop active disturbance rejection control; voltage outer loop passive control of the APF is an active-disturbance-rejection control system connected with a direct-current side capacitor of the converter, an active-disturbance-rejection hybrid passive control strategy is adopted, decoupling control between multivariable nonlinear coupling systems is achieved, and the robustness of the system is improved; and the TNPC type converter is adopted, so that the working efficiency of the converter is improved, the harmonic content is reduced, and the cost of the system is reduced.

Description

technical field [0001] The invention belongs to the technical field of power control systems, in particular to a control system based on a three-level TNPC type active power filter. Background technique [0002] As nonlinear loads are widely used in power systems, serious harmonic power quality problems are caused. Active power filters can effectively control harmonic problems, and are more and more widely used in the industrial field. It has the advantages of good filtering effect, convenient use, small size, etc., and can effectively suppress harmonics. Especially, APF based on the theory of instantaneous reactive power has become a research hotspot and development direction of harmonic suppression in power systems. For APF, DC side voltage and current inner loop control are important factors affecting APF compensation performance. [0003] Disadvantages of existing technology: [0004] (1) The converter in the active power filter adopts two levels, and the harmonic con...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02M7/483H02M7/5387
CPCH02J3/1842H02M7/483H02M7/5387Y02E40/20
Inventor 陈美锋张竞文李万军张芬杨春许贞贞刘艺李蚩行
Owner XIAN AERONAUTICAL POLYTECHNIC INST
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