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typical application At present, the main products are divided into two categories: harmonic control products and reactive power compensation products. The industries involved: tobacco, petroleum, electric power, textile, metallurgy, steel, rail transit, plastic chemical industry, medicine, communication, charging station, photovoltaic industry, Municipal, building and other industries, the following are several typical cases. 1. Textile industry: The main loads are large-capacity UPS and computer looms. The UPS provides the load with high-quality electric energy with high voltage stabilization accuracy and low waveform distortion. However, since the UPS is a nonlinear load, the rectifier in the UPS generates a large amount of harmonic current , so that the current distortion rate on the grid side is very high, which not only causes harmonic pollution to the grid, but also affects the normal input of the reactive power cabinet, and harmonic control must be carried out 2. In the water treatment industry, the motor of the water inlet pump is driven by a high-power frequency converter. Since the frequency converter needs to carry out high-power diode rectification and high-power thyristor inverter, as a result, current high-order harmonics are generated in the input and output circuits, which interferes with the power supply system. The load and other adjacent electrical equipment affect the abnormal operation of the metering instrument, and harmonic control must be carried out. 3. Tobacco industry: The load is "threshing line". "Threshing line" is to filter out the impurities in the tobacco leaves to obtain tobacco leaves without impurities. This process is realized through frequency converters and motors. The frequency converter is A very large harmonic source, so it brings serious harmonic pollution and harmonic interference to the system, and harmonic control must be carried out 4. Communication machine industry: UPS has become an indispensable equipment in the computer room, UPS can provide load High-quality electric energy with high voltage stabilization accuracy, stable frequency, and low waveform distortion, and can achieve uninterrupted power supply when switching with static bypass. However, since UPS is a nonlinear load, it will generate a large number of current harmonics. While the power grid causes harmonic pollution, it also affects other sensitive equipment in the computer room, causing great interference or even harm to the communication system. Therefore, all communication computer rooms must face the problem of harmonic control. 5. Rail transit: In order to respond to the national call for energy saving and consumption reduction, a subway group company decided to use inverters in rail transit for energy-saving transformation, and at the same time conduct harmonic control on the inverters. After a period of research, in order to better carry out the energy-saving renovation project, the group decided to conduct a pilot project on Rail Transit Line 4. Among them, the frequency converter is selected from the products of Schneider Co., Ltd., and the active power filter is selected from the products of Xi'an Xichi Power Technology Co., Ltd. 6. Metallurgical steel: Due to production needs, the equipment on the secondary side of the transformer in the low-voltage power distribution system is mainly a motor, and the frequency converter drives the motor to work. Since the internal structure of the frequency converter uses a large number of nonlinear components, a large number of harmonics are generated during the working process. There is a certain impact load during the rolling process of the plate, and the production process is not continuous, which causes fluctuations and discontinuities in the working voltage/current, and changes in the working current also cause harmonic current fluctuations.
Technical Parameters
Technical Parameters ●Applicable voltage level: 400V, 690V ●Working frequency: 50±2Hz ●Effective filter harmonic current capacity of single machine: 50A, 75A, 100A, 150A, 200A, 300A ●Neutral line filter capability: 3 times phase line RMS current ●CT requirements: need 3 CTs (Classl.0 or above precision) 5VA, CT secondary side current is 5A ●Filtering ability: up to 97% ●Module expansion capability: up to 10 functional modules can be expanded ●Switching frequency: 20KHz ●The number of harmonics that can be filtered out: 2~50 times (can eliminate all or selected harmonics) ●Filter degree setting: each harmonic can be set individually ●Compensation method: harmonic compensation, reactive power compensation or harmonic and reactive power compensation at the same time ●Response time: 40us ●Full response time: 10ms ●Protection function: power grid overvoltage, undervoltage, phase error, phase loss, overcurrent, busbar overvoltage, undervoltage, overheating and current limiting protection ●Display function: 1. Voltage and current values of each phase, current and voltage waveform display; 2. The total current value of the load and the total output current value of the filter are displayed; 3. Operation mode setting, fault information and running time query. ●Communication: RS485/RS232 ●Cooling method: forced air cooling ●Installation: the bottom plate is fixed, and the cable enters from the bottom ●Environment: indoor installation, clean environment ●Ambient temperature: -10°C~+45°C Humidity: Maximum 95%RH (no condensation) ●Altitude: ≤1000m, higher altitude can be used with reduced capacity ●Protection level: IP20 (higher protection level can be customized) ●Cabinet size (width x depth/height): 800*500*1700, 800*800*2200, 1200*800*2200 Non-standard size can be produced according to customer requirements ●Color: RAL7035, other colors are available upon request
