博文

目前显示的是 五月, 2017的博文

Application requirements of UPS in industrial field

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Today, all aspects of information technology in the field of industrial production, operation and management has been applied widely and deeply, at the same time, a variety of high-end precision equipment is also increasing, the industrial production to fine development, which put forward higher requirements on the quality of UPS. Not only the continuity of the power supply should be guaranteed, but also has special requirements for the purity of the power supply. However, it is necessary to point out that applied in power industry, on the one hand to the reliability of power supply, on the other hand in the operation of power equipment is often affected by various factors, resulting in power quality can not be effectively protected, for example, the grid pollution, natural lightning, large capacity motor starting, the switch of power factor compensation capacitor and so on, will directly affect the power quality and cause voltage fluctuation, pulse power interruption etc.. In this

Maintenance of solar grid connected inverter

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Grid connected  solar inverters  generally have 5~10 years of service life, and if it is used and maintained improperly, will seriously shorten the life of  solar grid connected inverter , and even bring security risks. First of all, according to usage requirements, need to determine the technical parameters of product, and then installed by professional technicians, and after approved by the local power sector, before the product can be connected into the power grid, put into use. The input and output terminals for daily use need to regularly check the product is connected firmly, input and output cable whether aging or damaged skin scratch, grounding wire is strong, whether there is a break or fall off, should be found for professional replacement. Do not arbitrarily remove the input and output terminals and their protective cover. Should avoide exposure of the live metal parts of the input and output terminals. When daily use, as the inverter fails, the connection protection

New challenges for grid connected solar inverters

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With the  solar power system  apply more and more widely, the grid connected inverter market has also played its role as a key component of solar energy installation. In order to realize the stable and reliable operation of the grid, the grid connected inverter market must ensure the quality of the transported power and the stability of the whole grid. To keep pace with these requirements, grid operators will publish new grid operating rules that each manufacturer must follow to oversee increasing usage. Another problem for  solar inverter manufacturers  is that the relevant policies and regulations of different countries are different. In most cases, different projects, even in the same place, should follow different rules and regulations. An urgent problem for grid connected  solar power inverter  manufacturers is that they must comply with the technical requirements of grid connected solar devices which are different in different countries. All of these countries and regions have d

Why do industries need grid connected solar power generation systems

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With the increasingly energy problem, the state has given high degree of affirmation to the photovoltaic industry, and encouraged various localities to actively build solar power generation projects through policy subsidies. Solar grid connected power generation system is the mainstream power supply system, which is suitable for industrial, commercial, agricultural and other fields. In March 17th, according to the Energy Bureau, electricity consumption in the whole society increased by 17.2% year on year, with a marked increase in heavy industry in February. Electricity consumption has risen dramatically. In order to do a better job of energy saving and consumption reduction, some provinces and cities have adopted the policy of limiting electricity for high energy consuming enterprises. After installing the grid connected power generation system, the electricity shortage will be effectively alleviated. Distributed grid connected  solar power system , because of the advantages of s

The solution for UPS unexpected jump to battery power supply mode

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The city power is normal, people can surf the Internet, but  UPS  always jump to the battery power supply mode. And in this mode there is always a beep. We immediately organized the staff to check the circuit and analyze the cause of the failure. Finally it linked to the vertical air-conditioning room, every time start the air conditioning for a while, it automatically converted into battery powered. Obviously this is due to the impact of high power air conditioning to the city power output. But they are separated in two power supply, from the switchboard of different distribution room, how will interfere with each other? With this question, the electrician followed the wire to open the ceiling, floor, junction boxes, etc.. in order to figure out that if there is a place where the circuit is falsely connected, and finally found that the zero line and the ground wire are connected together. So fuzzy interference can have an impact on the  high frequency online UPS , it really is a

Application of IGBT short circuit detection in modular UPS system

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In the  modular UPS system , when a power module of the system fails, the failure module need to exit the system timely, in order to reduce the influence of the fault module on the modular UPS system, so as to ensure the stability of output voltage. SOROTEC in the development process of  modular UPS solutions , carried out a variety of single fault test, in order to ensure the UPS power module in a single fault, to ensure the stable operation of modular UPS system. The single fault of inverter IGBT is a big challenge to the stability of UPS system. The operating state of the modular UPS system with only 1 power module in the inverter IGBT short circuit When only one power module is inserted into the  modular UPS cabinet , as the power module of IGBT inverter is short circuited, the output voltage and current are decreased, the power module to determine inverter fault, intermittent switch to bypass power supply, the output go stably. The output interrupt time in this process

Basic classification of telecom power supply

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1.Based power supply Also known as a first power supply. The based power supply of telecom station is divided into AC based power supply and DC based power supply. AC based power supply The low voltage AC power supply provided by the power supply unit, the standby oil generator set (including mobile power station), the  telecom inverter  (or UPS) is referred to as the AC power supply of the telecom station. Low voltage AC based power supply rated voltage of 220V or 380V (three-phase five wire), rated frequency of 50Hz. Telecom equipment directly by AC based power supply, input voltage range for the rated voltage of +5% ~ -10%. Telecom equipment by AC based rectifier power supply, input AC voltage range for the rated voltage of +10% ~ -15%. In the process of power supply, if the voltage range of the voltage of the grid or generator sets is beyond the allowable range of the telecom equipment or the rectifier equipment, should adopt AC voltage regulator, to ensure that the input AC

Analysis of the selection of PV modules and inverters in terms of efficiency and service life

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The capacity of the PV module and the capacity ratio of the inverter are commonly referred to as the capacity ratio. The reasonable capacity ratio design, should be integrated with the consideration of specific projects, the main factors including irradiance, system loss, the efficiency of the inverter, the service life of inverter component installation angle and so on. Cause the inverter accounts for only about 5% of the system cost, in the distributed solar power plant system, rely on components over the capacity ratio as to reduce the quantity or power of the  solar powered inverter , the investment income is very few, but also bring other problems, specific analysis is as follows. 1.Different regions have different irradiance According to the standards of the national wind energy assessment center, Chinese solar energy resources are divided into four categories. Even in the same resource area, there is a big difference in annual radiation in different places. For example, i