"Harmony number" of power grid operation: amorphous alloy anti-harmonic energy-saving transformer
What is harmonic?
Since the effective component of ac power network is a single power frequency, any component different from power frequency can be called harmonic.
As sinusoidal voltage is applied to the nonlinear load, the fundamental current distorts and generates harmonics.
The generation of harmonics in transmission and distribution system
The power transformer is the main source of harmonics in the process of transmission and distribution. Because the design of the transformer needs to consider the economy, the magnetization curve of its core is in the nonlinear saturation state, so that the magnetization current at work is a cusp waveform, and odd harmonics are generated.
The higher saturation degree of transformer core makes its working point deviate from the linear curve, resulting in large harmonic current. The proportion of odd harmonic current can reach more than 0.5% of the rated current of transformer.
Third, the harm of harmonics
The rapid development of various power electronic devices makes the harmonic pollution of public power grid more and more serious.
Harmonics reduce the efficiency of electric energy production, transmission and utilization, make electrical equipment overheat, produce vibration and noise, and make insulation aging, shorten the service life, or even failure or burn out; Harmonics may cause partial parallel resonance or series resonance in power system, which will amplify the harmonic content and cause the equipment such as capacitor to burn down. Harmonic can also cause relay protection and automatic device misoperation, so that the electricity metering chaos. For the external of power system, harmonics will cause serious interference to communication equipment and electronic equipment. Therefore, the safe operation of the power grid also needs the "Harmony Signal".
Can amorphous transformers do that?
Introduction of anti-harmonic transformer of amorphous alloy
A few days ago, amorphous China's big database found that tetransformer company absorbed advanced technology at home and abroad, combined with its own transformer product development experience, independently developed the patented technology to produce "amorphous alloy anti-harmonic energy-saving transformer" products, and passed the national test once
(2) Comparison of harmonic content between amorphous anti-harmonic transformer and ordinary amorphous transformer:
The experimental data show that the anti-harmonics and energy-saving transformer of amorphous alloy can effectively suppress harmonics and protect power supply system.
The biggest bright point of amorphous alloy anti-harmonic energy saving transformer is effective harmonic filtering. Relevant experiments show that the anti-harmonic transformer can effectively reduce the content of the third, fifth and seventh main harmonics and the third harmonics generated by single-phase load, effectively transfer the thermal effect of neutral point current, and reduce the impact on data communication equipment.
As an energy-saving and environmental friendly transformer, the product does not burn in use and will not cause harm to the environment, other equipment and human life. Moreover, after the service life of the product, the coil can be recycled and the resources can be reused, without causing damage to the environment.
