1. Tinjauan Proyek
This supermarket was built many years ago, and harmonic problems were not considered in the power system configuration then. When designing the power distribution system, Diameter kabel fase N lebih kecil dari kabel A/B/C tiga fase.
The building is divided into three floors. The first floor is a supermarket, and the second and third floors are clothing stores. In the first floor’s power distribution circuit, serious N-phase heating, and excessive current problems occurred.
2. Diagram sistem distribusi dan beban harmonik utama
Ada 4 load outlet cabinets in the power distribution room, among which the power consumption of the supermarket on the first floor is led out from the 3# Dan 4# lemari pengumpan.
In the power distribution structure, the power upstream of the 3# Dan 4# Lemari pengumpan adalah sakelar daya ganda, and this switch is a 4P switch.
The typical harmonic source at this site is an LED indicator light
The first symptom of the problem discovered at the site was the heating problem of the N-phase shell of the dual power switch.
3. Harmonic data testing and analysis
After selecting the on-site transformer, we conducted a test at the incoming cabinet location to gain an overall understanding of the on-site power quality issues.
4. Solusi harmonik
On-site improvement needs include resolving the overheating of the N-phase cables and switches in the first-floor supermarket. As the main harmonic source equipment is located in the first-floor supermarket, targeted measures are chosen to address the harmonic issues in the 3# Dan 4# feeder cabinets to reduce the N-phase current at the dual power switch positions and resolve the overheating issue in this N-phase location.
Pemilihan peralatan: Filter daya aktif (APF)
Model Peralatan: Coepo APF/200-0.4-D
Management method: perawatan lokal
Kapasitas pemasangan: 200A
Metode instalasi: jenis rak
Lokasi Instalasi: power distribution room
5. Memengaruhi
After harmonic improvement by active power filter:
1. Bentuk gelombang sistem saat ini telah meningkat secara signifikan, dari bentuk gelombang terdistorsi asli ke bentuk gelombang sinus normal;
2. The N-phase current dropped from the 251.4A to 17.2A. The N-phase current dropped significantly, so the N-phase cable heating problem is solved;
3. The system’s total harmonic distortion rate dropped from 47.2% ke 4.6%, dan efek kontrol harmonik itu signifikan.
Tag: Power system configuration, Solusi harmonik, Filter daya aktif (APF), Coepo APF/200-0.4-D, 200A APF, Rak Jenis Filter Daya Aktif, Pemasok, produsen, pabrik, grosir, membeli, harga, kutipan, dalam jumlah besar, untuk dijual, perusahaan, saham, biaya.
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