Low temperature will bring changes in physical properties of electronic components, and this change tends to be in an unfavorable direction. Blizzard has a great impact on photovoltaic power stations. Too thick snow will lead to over icing of components, affecting the power generation and life of the system, resulting in a decline in power generation and even stop work. For solar inverter, it is a severe test. Cold climate conditions may make the inverter can not work steadily, such as can not start, frequent alarm, power generation reduction and other problems.
How to choose inverter to deal with the erosion of extreme weather?
1.Select components of wide range of working temperature to fully meet the low temperature service conditions. 2.Takes full account of the demand for low temperature work in the design of the product, leaving enough margin (including capacity margin and time margin). 3.The product should be tested for a long time at low temperature to ensure the validation of theoretical value.
After long time use, there will be aging phenomenon in the connection of inverter.The inverter has its own insulation impedance detection, which can reliably protect the inverter. At the same time, it needs to pass the on-site inspection, and the thermal imager can scan the connection points of each cable at work; Check whether the inverter PV input terminal is stable or loose; Whether the AC terminal is aging and loosening; Whether there is grounding in the PV line under the sun plate.
1.Touch screen display. 2.Output power factor PF=1.0. 3.On + Off Grid with energy storage. 4.Energy generated record, load record, history information and fault record. 5.Connected with battery optional. 6.Wide PV Input Range.
The leakage current of the solar power system, also known as the square array residual current, is essentially common mode current, which is caused by the existence of parasitic capacitance between the solar power system and the earth. When the parasitic capacitance, and solar power system and the power grid forms a loop, the common mode voltage will produce common mode current on the parasitic capacitance. When the low frequency transformer is installed in the solar power system, the parasitic capacitance impedance of the transformer windings in the loop is relatively large, so the common mode current produced by the loop voltage of the CCP can be restrained. However, in a solar power system without transformer, the circuit impedance is relatively small, and the common mode voltage will form a larger common mode current on the parasitic capacitance between the solar power system and the earth, that is, leakage current.
The leakage current in the solar power system includes the DC and AC parts. If connect to the grid, the problems of the grid current distortion and electromagnetic interference will be caused, which will affect the operation of the equipment in the power grid. Leakage current may also cause the solar inverter enclosure to be electrified, which will pose a threat to personal safety.
1.Pure sine wave inverter 2.Built-in MPPT solar charge controller 3.Could be built-in battery 4.Protection degree:IP55 5.Configurable input voltage range for home appliances and personal computers via LCD setting 6.Configurable AC/Solar Charger priority via LCD setting 7.Compatible to mains voltage or generator power 8.Auto restart while AC is recovering 9.Overload/Over temperature/short circuit protection 10.Configurable battery charging current based on applications via LCD setting
The leakage current of the solar power system is essentially common mode current, which is caused by the existence of parasitic capacitance between the photovoltaic system and the earth. When the parasitic capacitance – photovoltaic system – power grid three forms a loop, the common mode voltage will produce common mode current on the parasitic capacitance. When the power frequency transformer is installed in the photovoltaic system, the parasitic capacitance impedance of the transformer windings in the loop is relatively large, so the common mode current produced by the loop voltage of the CCP can be restrained. However, in a photovoltaic system without transformer, the circuit impedance is relatively small, and the common mode voltage will form a larger common mode current on the parasitic capacitance between the photovoltaic system and the earth, that is, leakage current.
The leakage current in the photovoltaic system includes the DC and AC parts. If the grid is connected to the grid, the problems of the grid current distortion and electromagnetic interference will be caused, which will affect the operation of the equipment in the power grid. Leakage current may also cause the inverter housing to be electrified, which will pose a threat to personal safety.
1.Built-in PWM solar charge controller. 2.Modified sine wave output. 3.High frequency design. 4.Optional input voltage range. 5.Full automatic and silent operation. 6.Automatic charging. 7.Auto change AC-DC. 8.Over-load protection. 9.Automatic restart. 10.Three-steps intelligent charging control to recharging. 11.LCD display, audible and visual alarm. 12.Mains/solar output priority level for the customer to choose . 13.Mains/solar/ mains & solar charging three mode of prioritiesfor the customer to choose. 14.Built-in with 10 or 20 Amp charger for up to 200Ah battery.
The power supply system belongs to the airport public equipment, and the public equipment space of the airport terminal is limited. For the airport construction department, centralized power supply system needs to minimize the occupancy space under the premise of ensuring reliability. The traditional large capacity tower type UPS occupies a large space, and occupies more than twice the space occupied by modular UPS. If the 2N system is adopted, the space will be larger, and the space of the battery should be added, which is not suitable for the airport.
Therefore, considering the comprehensive consideration of airport construction department, modular UPS should be selected. The same capacity occupies almost half of the traditional tower UPS. At the same time, the active devices such as modular UPS power module, bypass module, control module and other active devices are all designed by hot plug. The system can meet the requirements of the airport to the reliability of the UPS by using the N+X architecture. It not only saves space for occupying space, but also facilitates operation and maintenance.
Once the traditional tower type UPS fails, it is necessary for the technical personnel of the original factory to carry out the maintenance. The maintenance time is often more than 24 hours. If the maintenance period is out of date, it is more unable to guarantee the availability. While modular UPS, only need to pass the spare parts power module, once the power module failure, the airport mechanical and electrical departments can be repaired, the failure module to move out, spare parts module into the line and everything can be done.
1.Superior energy saving and environment-friendly: Efficiency > 96% at 50%-75% rated load, and > 95% at 25% rated load; Input PF > 0.99,input THDi<3%. 2.Superior capability of powering load: Output PF is 0.9 or 1, no need of power deration with load of leading or lagging PF. 3.Easy-to-install: Top or bottom cabling, no need of input cabling cabinet. 4.Easy-to-maintain: Full front access, UPS, failed part can be replaced shortly. 5.Easy-to-modify: The number of battery cells can be configured flexibly, so the original batteries can be used when modifying the legacy system; moreover, the battery cell can be replaced in time when it fails without interrupting the normal operation of modular ups systems. 6.6-inch extra large LCD that can display 13 language (Chinese ,English ,Russian, French ,Spanlish and so on). 7.Provide large LCD touch screen (optional). 8.Each UPS modules provide 4.5KW charge capacity. equivalent to 10 to 12A. 9.On-Line Double Conversion, fully isolating the influences of power grid pollution and power failure from utility power supply and diesel generator to load. 10.Advanced DSP full digital control technologies realize higher system stability, online capacity expansion and maintenance. 11.Advanced distributed active parallel technology realizes parallel operation of 4 UPS units and online capacity expansion without centralized bypass cabinet. 12.Digital load sharing technology features extra low cross current and extreme high system reliability in parallel operation. 13.Adaptive to severe power grid environment due to extra wide input voltage and frequency ranges. 14.Extra strong capability to withstand output overload and short circuit, ensuring the system stability and system safety at limit conditions. 15.Intelligent battery management maintains battery automatically to prolong the battery life. 16.Efficient heat dissipation and effective protection under severe environment due to its independent layer-sealed ventilation channel and redundant fan design, as well as the paint-protected circuit boards and built-in dust filter. 17.Applicable voltage south America.
The wind turbine generates alternating current with the voltage of the system, and converts the solar charge controller into the DC power adapted to the system voltage, which is connected to the battery group and the solar inverter. PV array generates DC power that is compatible with system voltage, and is connected to battery pack and inverter by charging controller. The solar inverter converts the direct current input from the wind turbine and the PV array to 220V and 50Hz alternating current to provide AC load. The battery pack stores spare power which is not consumed by the load. When the wind turbine and PV array power generation is insufficient, the power consumption of the load is supplemented by the battery pack. When the wind turbine and the photovoltaic array do not generate electricity, the DC power stored in the battery group is converted to 220V, 50Hz alternating current to supply AC load through the solar inverter.
■SOROTEC Outdoor Intelligent High Frequency Online UPS provide continuous pure sine wave AC power supply for outside communications / network equipment.
■Double-conversion online design, high temperature resistant, anti-cold, sealing level for IP55; With the wide range of input voltage and frequency of input window (-45% +35% rated voltage and ± 10% rated frequency), in many remote areas of China after a severe test of the grid.
■This UPS is commonly used in the corner of the city, remote roads, mountains, bad environment, such as high temperature(+50 °C) / low temperature (-40 °C), severe dust, moisture,rain, mist erosion, very poor power quality (voltage longterm higher than 260V or less than 160V, frequency abnormal change) in the area.
