Recommended solution 1: Anti-harmonic low-voltage intelligent power capacitor + active filter (APF)/static var generator (SVG).

The APF module mainly realizes the function of high-efficiency filtering of harmonics. Considering the asymmetry of the three-phase load in the intelligent building, the method of combining the phase compensation and the common phase compensation is used in the compensation. The compensation should be considered according to the actual single-phase load asymmetry. For capacity distribution, the phase-phase compensation capacity generally accounts for 40% of the total compensation capacity. Generally, series reactors should be used in the compensation module to limit the closing inrush current of the compensation branch and suppress harmonics at the same time. , Match the series reactor with 13% reactance rate in the sub-compensation module, and match the series reactor with 7% reactance rate in the total compensation module. In this way, through the functions of APF, separate compensation and common compensation modules, comprehensive treatment of harmonics and reactive power in smart buildings are carried out to optimize power quality.

User benefits: The power factor is above 0.92, and reactive power compensation can be performed for single-phase loads. Therefore, the power quality problems such as harmonics and reactive power in the building have been significantly optimized and improved.

Recommended solution 2: For single-phase non-linear loads and when the neutral line of the neutral line exceeds the standard, the harmonic current blocker (NBF) + anti-harmonic low-voltage intelligent power capacitor is used, and a static reactive power generator ( SVG).

NBF Neutral Line Harmonic Current Blocker is a device specially developed for the treatment of neutral line harmonic currents. This equipment has a high cost performance in eliminating the harm of the third harmonic, and the cost is lower than the cost of thickening the zero line. It also has a significant power saving effect.

The advantage of using NBF to control the third harmonic current of the neutral line is that it can be managed from the perspective of the whole system, and any equipment on the power distribution system can benefit.

NBF is installed on the secondary side of the transformer and connected in series to the neutral line. NBF has a very high impedance to the third harmonic current, and can block the third harmonic current from flowing back to the transformer from the neutral line. Therefore, NBF can suppress the zero sequence current such as the third harmonic of the entire power supply system. Intelligent common-phase compensation and split-phase compensation modules, equipped with harmonic suppression reactors in the intelligent compensation module, can effectively control the neutral current, reactive power and harmonics in smart buildings. Thereby improving the power quality of the intelligent building power distribution system, ensuring the reliable operation of electrical equipment and achieving energy saving.

User benefits: After installing the NBF, the current harmonics on the phase line have been significantly reduced, and the third harmonic is the most obvious, and the neutral line current is greatly reduced. At the same time, it is equipped with an intelligent reactive power compensation module, which can correct the power factor. Comprehensive optimization of power quality issues such as harmonics and harmonics.