Detailed explanation of pure inverter power inverter

Pure sine wave inverter power supply is a high-quality power supply system designed for power plants, substations, communications industry, automation control equipment, solar energy, oil fields, wind energy, new energy, etc. It is mainly used in places where load equipment has high requirements for power quality. Such as power telecontrol, RTU, power carrier, monitoring, program-controlled switches, computer rooms, networks, billing, servers and emergency lighting places. If the AC input power is cut off, the DC panel or external battery cabinet provided by the power system and postal and telecommunications system will provide long-term, uninterrupted power supply to the load equipment through the inverter. If the DC panel is powered off, the inverter is overloaded or fails, the system will automatically switch to bypass power supply to ensure the continuity of the system power supply. Using inverter power supply to power important load equipment in places with DC power has the following advantages:

　　① Avoid repeated investment in battery packs, reduce system maintenance, and reduce system operating costs

　　② The DC panels of power systems and postal and telecommunications systems generally use valve-controlled sealed batteries. Since DC panels have high reliability and long life (10 to 15 years), the reliability and life of DC panels are greatly improved. However, the batteries in conventional UPS are often not maintained or monitored, which makes it easy for the batteries to be damaged but not discovered in time.

　　③ Since the capacity of DC panels is large, when using an inverter power supply, it can provide a sufficiently long AC power supply time after the power grid is cut off.

　　Lightning protection system: Damage to electrical equipment caused by lightning strikes is common, causing countless losses to production. To reduce the losses caused by lightning strikes, the power supply system is equipped with advanced lightning protection units to effectively prevent lightning strikes from harming the equipment. The input circuit can effectively, reliably and quickly absorb the pulse voltage of up to 6000VP-P·10US-700US at the input end, thereby ensuring that the output electrical equipment is not affected.

　　AC and DC isolation inverter technology: The DC system uses high-frequency, high-efficiency DC isolation converters to electrically isolate the input and output, effectively preventing electric shock accidents, making the grounding problem of the DC system very simple, and making secondary grounding more convenient. The active filtering technology used in DC greatly reduces the system's backflow noise and increases the input voltage of the DC system. The high voltage of the DC/DC high-frequency isolation converter is connected in parallel with the APFC high voltage and sent to the inverter. Therefore, when the mains power is normal, the inverter is powered by AC rectification and the DC is in hot backup mode. When the mains power is interrupted or the AC input is abnormal, the protection starts normally, and the DC is supplied to the inverter after DC/DC isolation conversion, and is converted into a 220V sinusoidal voltage output by the inverter. Therefore, whether the mains power is normal or not, the power system supplies power to the load through the inverter, so it always outputs a frequency-stabilized and voltage-stabilized 220V AC voltage, which truly realizes uninterrupted operation.

　　Sine pulse width modulation technology: The whole machine adopts a full high-frequency design, with the advantages of strong anti-interference ability, high voltage stabilization accuracy, high frequency stability, low distortion, high efficiency, small size, light weight, etc. The inverter main circuit adopts advanced pulse width modulation and triple over-current detection technology, which greatly improves the reliability of the inverter, makes the instant formed by nonlinear load controllable, and has good output protection characteristics.

　　Remote monitoring: With remote monitoring signal output, the real-time working status of the inverter power supply (DC input, AC input, inverter operation, fault signal) can be sent to the control center for monitoring through the switch input port of the data acquisition system, which is clear at a glance.

　　Hot backup system: Any 2/3 units can be connected to form a 2+1 or 3+1 hot backup system. The system has a built-in automatic connection program, and any unit can be connected for output, making installation more convenient and the system more reliable.

　　Strong earthquake-resistant design: The system adopts earthquake-resistant technology design, which greatly improves the adaptability of long-distance transportation and vehicle-mounted systems and effectively reduces the probability of damage.