Analysis of Harmonic Distortion in 225kV High-Voltage Power Supply

In the modern power system, the 225kV high-voltage power supply plays an extremely important role, providing a powerful and stable power supply for industrial, commercial, and residential electricity consumption. However, with the widespread application of power electronic devices, the problem of harmonic distortion has gradually become one of the key factors affecting the performance of high-voltage power supplies and the power quality.
Harmonic distortion refers to the situation in the power system where, due to the presence of non-linear loads, the current or voltage waveform deviates from the ideal sinusoidal waveform, generating additional higher harmonic components. For the 225kV high-voltage power supply system, harmonic distortion may trigger a series of problems.
From the perspective of equipment, harmonics will increase the losses of equipment. For example, under the action of harmonic currents, equipment such as transformers and cables will generate additional eddy current losses and hysteresis losses, leading to more severe heating of the equipment and shortening its service life. Harmonics may also affect the normal operation of the relay protection device, causing the protection device to malfunction or refuse to operate, thus threatening the safe and stable operation of the power system.
In terms of power transmission, harmonics will increase the losses of the line and reduce the efficiency of power transmission. Harmonic currents will generate electromagnetic interference during the transmission process, affecting the normal operation of nearby communication lines and electronic devices. In addition, harmonic distortion will also lead to the distortion of the voltage waveform, affecting the power quality of power users. For some equipment with high requirements for voltage quality, such as precision instruments and computers, harmonic distortion may cause abnormal operation or even damage to the equipment.
In order to accurately analyze the harmonic distortion of the 225kV high-voltage power supply, professional measurement equipment and analysis methods need to be adopted. Commonly used measurement equipment includes harmonic analyzers, etc. By conducting real-time monitoring and analysis of the current and voltage in the high-voltage power supply system, key information such as harmonic content and harmonic spectrum can be obtained. In terms of analysis methods, mathematical tools such as Fourier transform can be used to decompose the complex non-sinusoidal waveform into the superposition of sinusoidal waves of different frequencies, so as to accurately determine the components and amplitudes of each harmonic.
For the harmonic distortion problem in the 225kV high-voltage power supply system, effective suppression measures need to be taken. Common suppression methods include installing filters and using active power filters. The filter can effectively filter out specific frequency harmonic components, while the active power filter can compensate the harmonic current in the system in real time, thus improving the power quality of the power system.
In conclusion, in-depth analysis and effective suppression of the harmonic distortion of the 225kV high-voltage power supply are of great significance for ensuring the safe and stable operation of the power system and improving the power quality. With the continuous development of power electronics technology, the problem of harmonic distortion will also face new challenges, and we need to continuously pay attention and explore more effective solutions.