A comprehensive explanation ofseries resonance (also known as variable frequency series resonance device)will be introduced to you. Firstly, whether it is series resonance or parallel resonance, they belong to the structural branches of series resonance testing devices, but there is a slight difference in their names. Next, let's take a detailed look.
What isseries resonance
With the preventive testing of large capacity and high voltage electrical engineering equipment in China, it is recommended to use power frequency withstand voltage to analyze the performance of insulation materials, which eliminates the management requirements for insulation performance testing of electrical technology equipment using DC high-voltage generators. Although both belong to destructive tests, after long-term research by enterprises, the use of power frequency withstand voltage method has better stability and safety compared to DC withstand voltage. Due to the large capacity and high voltage of electrical automation equipment in China, power frequency withstand voltage equipment such as oil immersed test transformers are often unable to meet the testing requirements of students. In China, in order to achieve this educational goal, basic information is measured through frequency conversion series resonance.
Variable frequency series resonance, also known as "variable frequency" series resonance circuit, generates resonance by adjusting the frequency conversion range. "Series" refers to the entire circuit under the same connection method, series connection, voltage, and current. "Resonance" refers to the resonant circuit, and when combined together, it is commonly referred to as a series resonance testing device.
Test conditions forseries resonance
After obtaining the project management for experimental research, we need to analyze the main role of the testing entity, such as power system cables, transformers, GIS combiners, busbars, etc. The voltage applied to different contents of the enterprise is different. For example, for the same transformer, the neutral point grounded and ungrounded voltage levels are different, and the wiring is also different. The voltage and capacity directly affect the configuration design scheme of the student series resonance test detection device. The configuration work plan refers to the network connection production mode and series development mode? How to string? In short, the condition for achieving series resonance is that when the capacitance impedance is equal to the inductance impedance, resonance conditions can be generated.
