Modelling of low inductive busbars for medium voltage three-level NPC inverter

Popova, L.; Musikka, Tatu; Juntunen, Raimo; Lohtander, Mika; Silventoinen, Pertti; Pyrhönen, Olli; Pyrhönen, Juha

doi:10.1109/pemwa.2012.6316369

Cited by 30 publications

(3 citation statements)

References 17 publications

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“…They operate at high switching frequencies, use small passive filters, absorb quasi-sinusoidal currents from the network, and provide voltages close to the sinusoidal voltage to the loads. Modern and robust multilevel converters are in accordance with the current international standards [4], [5]. This is a very important aspect for industrial equipment.…”

Section: Introductionmentioning

confidence: 99%

“…The analysis and synthesis of the topology of multilevel converters are the fundamental elements in choosing the structural solution for converters that can operate at high voltage together with the optimal control solutions in terms of global energy efficiency. Multilevel structures are used mainly in the case of high-power converters when the working voltage is high, practically of 6 kV [4], [6], [7]. The use of Insulated-Gate Bipolar Transistors (IGBTs) is more difficult for standard inverters in two levels, because the maximum working voltage for normal IGBTs is 6.5 kV with a maximum voltage of 3.3 kV in the intermediate circuit of the converters.…”

Section: Introductionmentioning

confidence: 99%

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Three-Level Inverter Control Techniques: Design, Analysis, and Comparisons

Selişteanu

Roman

Mandache

et al. 2021

ELEKTRON ELEKTROTECH

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This work addresses the analysis and design of various Proportional-Integral-Derivative (PID) control techniques for a three-level inverter. Multilevel power converters are modern and basic elements of high-voltage electric drive and power supply systems. By using simulations and specific computer-aided design tools, the overall functional characteristics of multilevel converters, as well as the electrical demands of the components, can be accurately assessed to obtain an appropriate control solution. An innovative and detailed software model of a three-level inverter is developed and then used for the implementation of control techniques. Several tuning methods are used to tune PID controllers for two specific cases: the multilevel inverter with a linear load and with an asynchronous motor load, respectively. A detailed analysis and comparisons of the quality criteria and control performance are achieved. This analysis shows that the choice of controller type depends on the inverter load. For the linear load, proper results are obtained with a PI Nichols-tuned controller, and for the asynchronous load, with a PI controller tuned via a modified Hokushin method. The computer-aided design tools can be further used for the simulation of the equipment in various operating conditions, normal and fault, following all functional parameters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-Level Inverter Control Techniques: Design, Analysis, and Comparisons

Selişteanu

Roman

Mandache

et al. 2021

ELEKTRON ELEKTROTECH

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“…Two measurement methods can be applied: indirect and direct. The indirect method measures the voltage overshoot ΔV and the current change di/dt to calculate the stray inductance value of the current commutation loop [13]. This practical approach requires that the busbar is physically connected with the charged capacitors and the power switching module that is turned on and turned off.…”

mentioning

confidence: 99%

Determination of Stray Inductance of Low-Inductive Laminated Planar Multiport Busbars Using Vector Synthesis Method

Pickert

et al. 2020

IEEE Trans. Ind. Electron.

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Laminated busbars connect capacitors with switching power modules and they are designed to have low stray inductance to minimize electromagnetic interference. Attempts to accurately measure the stray inductance of these busbars have not been successful. The challenge lies with the capacitors as each of them excite the busbar producing their individual stray inductances. These individual stray inductances cannot be arithmetically averaged to establish the total stray inductance that applies when all the capacitors excite the busbar at the same time. It is also not possible to measure the stray inductance by simultaneous excitation of each capacitor port using impedance analyzers. This paper presents a solution to the above dilemma. A vector synthesis method is proposed whereby the individual stray inductance from each capacitor port is measured using an impedance analyzer. Each stray inductance is then mapped into an x-y-z frame with a distinct direction. This mapping exercise allows the data to be vectored. The total stray inductance is then the sum of all the vectors. The effectiveness of the proposed method is demonstrated on a busbar designed for H-bridge inverters by comparing the simulation and practical results. The absolute error of the total stray inductance between the simulation and the proposed method is 0.48nH. The proposed method improves the accuracy by 14.9% compared to the conventional technique in measuring stray inductances.

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Mechanical System

2023

Design of Three‐Phase AC Power Electronics Converters

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Modelling of low inductive busbars for medium voltage three-level NPC inverter

Cited by 30 publications

References 17 publications

Three-Level Inverter Control Techniques: Design, Analysis, and Comparisons

Three-Level Inverter Control Techniques: Design, Analysis, and Comparisons

Determination of Stray Inductance of Low-Inductive Laminated Planar Multiport Busbars Using Vector Synthesis Method

Mechanical System

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