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Harmonics are interference bands that are harmful to electrical components such as capacitors in low-voltage networks. Over the years, the plant has not used low-voltage side compensation capacitors for harmonic control, so that the low-voltage power grid is greatly affected, and the production of acrylic devices is restricted to a certain extent. Harmonic waves often cause part of the motor to heat up or even overheat, and consume power. The power factor of the motor is only 0.789, which adds a burden to the power supply network.
In order to comprehensively deal with harmonic hazards in low-voltage power grids, the plant technicians conducted several on-site inspections of harmonics. The results show that harmonics cause additional loss of components in the grid, interfere with and destroy the normal operation of electrical equipment, resulting in high voltage and The capacitor on the low-voltage side can not operate normally, resulting in deterioration of the power supply quality and further affecting the smooth operation of the acrylic device. For this reason, the plant decided to use capacitive compensation equipment to increase the capacitive reactive power and increase the power factor of the low-voltage power network according to the characteristics of the production of acrylic devices. At the same time, a set of capacitance compensation equipment was connected in parallel to the underside of each transformer in the substation. The corresponding power factor controller. Through the successful transformation of the low-voltage power grid of the five production lines of acrylic fiber spinning, the electricity consumption has been greatly reduced, and the electricity cost is saved by RMB 836,000 per year; the increase of the power factor also increases the spinning capacity. In the first quarter of this year, the plant averaged Nissan made 197 tons of acrylic fiber, reaching a record high of 210 tons.
Daqing Petrochemical harmonic suppression renovation completed
The harmonic suppression retrofit project invested by Daqing Petrochemical Acrylic Fiber Plant with a cost of RMB 430,000 has recently been fully completed, which indicates that the problem of the low power of the power grid and the large amount of harmonic losses in the entire power supply system has been successfully solved.