设计和分析一个单一来源的七层常用地面SC基于多层逆变器拓结构,具有高可靠性的设计和分析
Md Tahmid Hussain1, Adil Sarwar1, Md Reyaz Hussan1
1Department of Electrical Engineering, Zakir Hussain College of Engineering and Technology, Aligarh Muslim University, Aligarh, India.
Scientific reports
|July 27, 2025
概括
本研究介绍了一种新的开关电容器逆变器,用于高效的功率转换. 拟议的七级逆变器提供高效率和降低波扭曲,优于现有的多级逆变器设计.
科学领域:
- 电气工程 电气工程
- 电力电子 电力电子 电力电子
背景情况:
- 多级逆变器 (MLI) 拓经常面临诸如高压应力和总波扭曲 (THD) 等挑战.
- 在现代应用中,对高效可靠的功率转换解决方案的需求越来越大.
研究的目的:
- 设计一个紧的,单阶段的,七级 (7L) 开关电容器 (SC) 逆变器,具有共同的基础.
- 与现有的MLIs相比,改进关键性能指标,如效率,THD和电压压力.
主要方法:
- 使用单个直流源,8个开关,2个二极管和3个电容器,实现三倍的电压提升.
- 实现最近水平脉冲宽度调制 (PWM) 用于切换脉冲生成.
- 进行了对故障容忍的可靠性分析,并使用了PLECS热建模来评估效率和损失.
主要成果:
- 在600W负载下达到97.4%的高效率.
- 已证明减少了泄漏电流,改善了THD,最大限度地减少了导电损失和高功率密度.
- 实验验证证在各种条件下证实了强大而动态的性能.
结论:
- 拟议的基于SC的7L逆变器为传统的MLI提供了优质的替代方案.
- 该设计为功率转换应用提供了增强的性能,可靠性和紧性.
相关概念视频
01:20Design Example: Capacitance Multiplier Circuit
967
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
967
01:25Multimachine Stability
230
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
230
01:23Voltage Doubler Circuit
862
A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
862
01:24Bridge rectifier
843
The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
843
01:24Bus Impedance Matrix
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Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
177
01:21Power System Three-Phase Short Circuits
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Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
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