Why is the harmonic current on the null line mainly three times? This is due to two reasons: (1) Among the harmonic components generated by single-phase rectifier circuit, the third harmonic is the largest, and the distortion rate of the third harmonic usually reaches more than 80%. (2) The harmonic current of other times will have the effect of canceling on the zero line, onl...
Research background Because the value of harmonic loss is smaller than that of fundamental loss and the calculation is difficult, it is generally ignored in the theoretical calculation of line loss. However, with the development of power electronics technology, the nature of power generation and electrical equipment is becoming increasingly complex, and various nonlinear components put into ...
Static var generator SVG is adjusted to exchange capacitive or inductive current to maintain or control specific parameters (Power Factor) of the electrical power system. Static var generator is a real time var compensator. SVG provides dynamic reactive power compensation and is directly connected parallely to the bus of networks. SVG's reactive power is generated by capacitors of harmonic f...
Prehistoric era -PT PT is the earliest generation of IGBT. It uses heavily doped P+substrate as the starting layer, on which N+buffer and N-base epitaxy are successively grown, and finally the cellular structure is formed on the surface of the epitaxy layer. It is named because the electric field runs through the entire N-base region at the cut-off time. Its process is complex, its cost is h...
What is the power quality problems at sites with welding machines? The most common power quality problems associated with welding machines are voltage sags, harmonic pollution, and electromagnetic interference. Voltage sags can cause the welding machine to operate at a lower than expected output, resulting in poor weld quality. Harmonic distortion pollution can cause interference with other equipm...
What are scenarios causing power factor displacements 1. Poorly designed electrical systems with inadequate power factor correction equipment. 2. Large inductive loads such as motors, transformers, and generators that cause lagging power factor. 3. Unbalanced three-phase loads that cause phase displacement of the current and voltage waveforms. 4. Unbalanced single-phase loads that cause current an...
Power Quality Power electronics make modern life possible and enable all other areas of innovation. Although stable power delivery seems like a simple problem, the design of a high-efficiency power transmission and conversion system is prone to several problems that reduce efficiency by reducing delivered power. Nonlinear components are needed in power electronics to control the flow of power and ...
Project Name Daqing Electric Power Group Distribution Network Energy Conservation Comprehensive Management Project Project Background and Construction Objectives The distribution network of Daqing Power Group consists of 7 distribution stations, including Ranghulu, Longnan, Saltu, Dongfeng, Donghu, Honggang, and Chuangye. There are over 1000 transformers, with transformer capacities ...
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IPv6 network supported
