Abstract: With the development of power electronics technology, harmonic hazards has become increasingly serious, harmonic governance issues has been imminent. On the power source for electronic devices harmonic analysis and concluded that its harm and the corresponding harmonic management principles and comprehensive management, and management of a harmonic outlook.
Key words: power electronics; harmonics; hazards; inhibition
INTRODUCTION
With the development of power electronics technology, power electronic devices to the extensive application of power system harmonics caused serious pollution. Various power electronic equipment in the transport, metallurgical, chemical and other industrial traffic the extensive application of harmonics in the grid problem is becoming increasingly serious, many low power factor of power electronic devices to the power grid additional burden on the quality of power and influence, Therefore, the power electronic devices harmonic pollution has become hinder the development of power electronics technology major obstacles. Therefore, inhibition harmonic pollution and improve the power factor of power electronics technology has become a major issue in the. This paper focus on the key issues of power through electronic harmonic sources and the danger of understanding and analysis, and control of pollution from the relationship between the consideration of a comprehensive management approach on the final harmonic trends in the development of comprehensive management of the prospect.
A power electronic device - the main source of harmonics
Nonlinear load is a harmonic sources, which caused grid voltage distortion, in the voltage several times with the whole of the fundamental frequency component. Harmonic as the main source of power for various electronic devices mainly AC-DC converter (rectifiers, inverters, chopper, Drives), as well as bidirectional thyristor controlled switching equipment, as well as internal power system Variable Flow equipment, such as HVDC rectifier valve and the valve, and other inverter. Below its harmonics generated an analysis of the situation.
1.1 Rectifier
As a DC power supply devices, rectifiers widely used in various occasions. Figure 1 (a) and Figure 1 (b) respectively for the single-phase and three-phase circuits typical. In rectifier devices, AC power supply for the current rectangular wave, rectangular wave of the fundamental frequency for the current and Jibeiai several times for the high-frequency harmonic current waveform synthesis. Obtained by Fourier series of rectangular wave of high harmonics In fundamental component I1 and the largest ratio of 1 / n, with the trigger control angle α, and the decrease of overlap angle μ for the increase of harmonic wave components have reduced trend.
In addition, the existing research results indicate that: Rectifier harmonic current operation mode of the size, has a direct impact, therefore consider adjusting the voltage and current rectifier, it is best to conduct overlap angle, as well as for harmonic phase pressure drop calculations, in order to determine safe and economical operation mode when the control close to 40 ° angle α, overlapping in the 8 ° angle μ about the circumstances are often the most serious state of harmonic, so to go through, as far as possible through the correct choice of regulating transformers tap in order to avoid Harmonic most serious point [1].
1.2 exchange regulator
Exchange regulator used for lighting dimming and induction motor speed, and so on. Figure 2 (a) and 2 (b) respectively for the single-phase and three-phase circuits typical. Exchange regulator and the harmonic frequency rectifier basically the same.
Frequency Converter 1.3
Frequency converter is AC / AC Converter behalf of equipment, when used as mot
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Title: Advancements and Applications of Power Electronics in Modern Energy Systems
Abstract:
Power electronics, as a rapidly evolving technology, plays a pivotal role in the modernization and optimization of energy systems. This paper comprehensively reviews the recent advancements in power electronic devices, converters, and control strategies, and explores their diverse applications in renewable energy integration, electric vehicle technology, and industrial motor drives. The increasing demand for efficient, reliable, and sustainable energy solutions has driven significant research and development efforts in power electronics, leading to innovative solutions that enhance energy conversion, transmission, and distribution. The paper concludes by highlighting the challenges and future research directions in this exciting field.
摘要：
电力电子技术作为一项快速发展的技术，在现代能源系统的现代化和优化中发挥着关键作用。本文全面回顾了电力电子器件、变换器和控制策略的最新进展，并探讨了它们在可再生能源并网、电动汽车技术和工业电机驱动等领域的广泛应用。对高效、可靠和可持续能源解决方案的日益增长的需求，推动了电力电子技术领域的大量研究和开发工作，产生了许多创新的解决方案，这些方案提高了能源转换、传输和分配的效率。本文最后强调了该领域的挑战和未来研究方向。
Introduction:
Power electronics encompasses a broad range of technologies that facilitate the efficient conversion, control, and conditioning of electric power. With the proliferation of renewable energy sources and the widespread adoption of electric vehicles, the importance of power electronics has become increasingly evident. Renewable energy systems, such as solar and wind power plants, generate electricity in the form of direct current (DC), which must be converted to alternating current (AC) for integration into the grid. Similarly, electric vehicles rely on power electronics for motor control, battery management, and charging systems. This paper delves into the key advancements and applications of power electronics in these and other areas.
引言：
电力电子技术包括一系列技术，这些技术促进了电能的高效转换、控制和调节。随着可再生能源的普及和电动汽车的广泛应用，电力电子技术的重要性日益凸显。可再生能源系统，如太阳能和风能发电厂，以直流电（DC）形式发电，需要转换为交流电（AC）才能并入电网。同样，电动汽车也依赖于电力电子技术来实现电机控制、电池管理和充电系统。本文深入探讨了电力电子技术在这些领域以及其他领域的关键进展和应用。
Selected Applications:
Renewable Energy Integration:
Power electronics plays a crucial role in the integration of renewable energy sources into the grid. Solar panels and wind turbines generate DC power, which is converted to AC power using power electronic converters such as inverters. Advanced control strategies and devices like solid-state transformers enable efficient and reliable grid integration, addressing issues like voltage and frequency fluctuations.
翻译：
电力电子技术在可再生能源并网中发挥着至关重要的作用。太阳能电池板和风力涡轮机产生直流电（DC），这些直流电通过电力电子变换器（如逆变器）转换为交流电（AC）。先进的控制策略和器件（如固态变压器）实现了高效可靠的电网并网，解决了电压和频率波动等问题。
Electric Vehicle Technology:
The motor drive system in electric vehicles relies heavily on power electronics for precise control of motor speed, torque, and energy flow between the battery and the motor. Advanced converters and control algorithms enable efficient energy utilization and extend battery life.
翻译：
电动汽车的电机驱动系统严重依赖电力电子技术来精确控制电机的速度、转矩以及电池和电机之间的能量流动。先进的变换器和控制算法实现了高效能源利用并延长了电池寿命。
Industrial Motor Drives:
In industrial settings, power electronics enables efficient and flexible control of electric motors, reducing energy consumption and improving productivity. Variable frequency drives (VFDs) and adjustable speed drives (ASDs) are common examples, utilizing power electronic converters to match motor speed and torque to varying load demands.
翻译：
在工业环境中，电力电子技术实现了对电动机的高效灵活控制，降低了能源消耗并提高了生产率。变频驱动器（VFD）和可调速驱动器（ASD）是常见示例，它们利用电力电子变换器使电机速度和转矩与变化的负载需求相匹配。
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