Impact of power quality on electricity consumption

 in the metallurgical industry

        Metallurgical loads generally have problems such as large reactive impact, low power factor and large harmonic content. Common equipment in the metallurgical industry includes medium-frequency furnaces, arc furnaces, rolling mills and other equipment. The operation of this equipment will generate a large amount of harmonic current, causing the voltage and current waveforms of the power grid to distort, affecting the power supply quality of the system, and causing harm to other power supply and power-consuming equipment. Xixing Technology provides professional harmonic control products that can efficiently solve the power quality problems in the metallurgical industry and create a green, healthy, safe and stable power consumption environment.

Where do harmonics in the metallurgical industry come from?

        The number of pulses in the medium frequency furnace and rolling mill commutation device is generally 6 pulses or 12 pulses. For a 6-pulse medium frequency furnace or rolling mill, the main harmonics are 5, 7, 11, 13, etc.; for a 12-pulse medium frequency furnace or rolling mill, the main harmonics are 11, 13, etc. characteristic harmonics.

        The arc furnace generates a large amount of harmonic current. The three phases are unbalanced and asymmetrical, with more third and multiple harmonics of 3 and certain even harmonics.

Pain points of power quality in the metallurgical industry

        The load in the metallurgical industry changes rapidly, and the frequent start-and-stop of loads such as medium-frequency furnaces, rolling mills, and arc furnaces causes low power factor and reactive power fines. At the same time, the voltage and current waveforms in the power grid are distorted, resulting in increased distribution network losses and deterioration of power quality. This directly affects the safe and reliable operation of electrical equipment.

Metallurgical Industry Solutions

        EasyPQ-APF series active filters of Xixing Technology can control 2-50th harmonics, and the harmonic filtering rate of low-order harmonics (harmonics within 13th order) can reach more than 95%; EasyPQ-SVG series static reactive generators are suitable for occasions with complex reactive compensation and can perform two-way compensation with a response time of less than 10ms, which can comprehensively improve the power quality of the system and ensure the safety of users' electricity use.