SEO Blog

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 voltage to meet the requirements. The frequency range of the low voltage AC power supply shall be within the rated voltage of ±5% or less, and the sine distortion rate of the voltage waveform shall not be greater than 5%.

DC based power supply
Power supply DC voltage for all kinds of telecom equipment, telecom solar inverter and DC converter, called DC based power supply. The rated DC voltage power supply of telecom station is -48v. The battery of DC power supply usually consists of 24 lead-acid batteries, battery voltage will change in -51.6 ~ -55V when charging. In the discharge process, battery voltage will be lower than the rated voltage of the battery which is -48V, considering the voltage drop of the DC feeder between the battery room and the telecom room, the DC input voltage of telecom room of each frame allows changes in the range of -40 ~ -57V.

2.Rack power supply

Rack power also known as the second power supply. Due to a variety of special integrated circuits in a large number of telecom equipment applications, need to use 3.3V, 5V, 12V and other low-voltage power supply. In order to reduce first power requirement and save cost and reduce the maintenance workload, at present all kinds of telecom equipment is installed in the DC converter, the -48V DC voltage conversion needed for the work of 3.3V, 5V, 12V. In order to improve the reliability of power supply, several DC converters are used in parallel. In addition, a number of telecom devices are also equipped with a ringing power supply to convert the -48V voltage into the AC voltage required for ringing.

SOROTEC SHW48200 48VDC Telecom Station Solar Hybrid System

Key Features:
■Adopt advanced MCU microprocessor control technology.
■Advanced MPPT Technology,High converting efficiency higher than 97% for minimizing energy loss.
■Reversed current protection at night, over voltage and reverse polarity protection.
■Capable of selecting different charging mode for various types of batteries.
■Protection degree:IP55
■Industy-leading power density compact size and high reliability;
■Doorframe designed with waterproof structure, posted on the seal and equipped with waterproof lock on the door double insulation design;
■Cabine adopt quality galvanized sheet or aluminum coated steel sheet as material, surface coating anti-UV power;
■Suitable for outdoor installation.

Application

Power plant or substation power for controlling, protection and automatic device, emergency lighting, communications, steam turbine DC oil pump and so on independent DC systems. It can provide reliable power supply in the case of a power failure completely in plant or substation. The traditional DC systems connect battery pack and run with float charging mode. The new DC system run with silicon controlled rectifying power supply for battery.

Learn More

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, in the area of Tibet and Qinghai which are the same type of resources, the annual radiation of the Tibet is 7998MJ/m2, while Qinghai is 6815MJ/m2. This means that the same system configuration, which is the same capacity ratio, the region’s power generation capacity of Tibet is 17% higher than Qinghai. To achieve the same amount of power generation, you can achieve by changing the capacitance ratio.

2.System loss

In the solar power system, the energy from the solar radiation to the PV module, through the DC cable, confluence box, DC distribution to the inverter, which has the loss of each link. That is, in the same assembly capacity and inverter capacity, loss due to various objective existence, the actual output capacity of the inverter is only about 90% of the rated capacity, even in the best time of light, the inverter is not full work.

3.Inverter efficiency

The efficiency of the inverter is not constant, there is the loss of power switching devices and magnetic losses; when it is in low power, the efficiency is relatively low; the highest efficiency at 40% to 60% power; when more than 60%, the efficiency gradually reduced. Therefore, the total power of the PV power should be controlled between 40% and 60% of the inverter power to achieve the best efficiency.

4.The service life of inverter

Solar power inverter is an electronic product, there is a great relationship between the reliability and the operating temperature of the inverter, the temperature of capacitors, fans, relays and other components increase of 10 degrees, while the failure rate can be increased by more than 50%. The operating temperature is related to power, according to statistics, the service life of inverter works in the 80-100% power power is about 20% lower than in the 40-60% power for a long time.

5.The best inverter operating voltage range

The operating voltage is about the rated voltage of the inverter, while the efficiency is the highest, the single-phase 220V inverter, the inverter input rated voltage is 360V, the three-phase 380V inverter, the inverter input rated voltage is 650V. Such as 3kva inverter, with 260W components, working voltage 30.5V, with 12 working voltage 366V, the total power of 3.12kW is the best. 30KW inverter with 260W components, connected to 126 components, each of the 21 strings, the voltage is 640.5V, the total power of 32.76kW is the best.

Above all, when the power of the system between the rated power of 40-60%, the highest efficiency and the longest service life. In order to achieve the best performance of the inverter, according to different lighting conditions, components and inverters have different ratio.

SSP3118C3 1.5KVA & 3KVA Solar Inverter Off Grid MPPT Transformerless Type

Key Features
1. Pure sine wave 3KVA solar inverter off grid MPPT
2. Cold start function
3. Remote panel available
4. Auto restart while AC is recovering
5. Overload and short circuit protection
6. Compatible to mains voltage or generator power
7. Selectable charging current based on applications
8. Configurable AC/Solar input priority via LCD setting
9. Built-in MPPT solar charge controller
10. Smart battery charger design for optimized battery performance
11. Selectable input voltage range for home appliances and personal computers

Learn More

1.Solar MPPT charge controller input and output short circuit protection function. The input and output circuits of the controller should be provided with short circuit protection circuit.
2.Anti reverse charge protection function. The solar MPPT controller must have the protection function to prevent charging back to the solar cell from the battery.
3.Polarity reverse protection function. The solar cell component or battery is connected with the controller, and when the polarity is reversed, the controller should have the function of protecting the circuit.
4.Lightning protection function. The input end of the controller is provided with a lightning protection function, and the type and the rated value of the arrester shall ensure that the expected impact energy can be absorbed.
5.Anti impulse voltage and impulse curren protection. The controller should not be damaged by applying 1.25 times nominal voltage at the input of the controller for an hour. The controller charging circuit current reaches 1.25 times the nominal current and lasts an hour, the controller should not be damaged.

SOROTEC MPPT Solar charge controller

■Adopt advanced MCU microprocessor control technology.
■12V/24V/48V self detect to choose output voltage.
■Advanced MPPT T echnology, High converting efficiency higher than 97% for minimizing energy loss.
■Capable to parallel in output, to expand capacity easily.
■Reversed current protection at night, over voltage and reverse polarity protection.
■Capable of selecting different charging mode for various types of batteries.
■Capable of connecting additional DC load for wider applications.
■Three stage charge control system(bulk, absorption, and float mode) with optional temperature compensation
■LED indicators display charge status in real time, Optional LCD digital display.
■Pulse Width Modulation (PWM) technology combined with a multi-stage charge control algorithm leads to superior charging and enhanced battery performance.
■selectable external LCD display.

Learn more about 12v mppt solar charge controller

The rise of home solar power system in the rural areas, not only bring a stable income to the farmers, but also use rural areas resources effectively. Let barren hills, courtyards and roofs are used properly. It is precisely because of these strong conditions, so that home solar power system in rural areas has great development potential.

1.Effectively improve the living environment of rural areas
Macroscopically, the photovoltaic industry has a great significance to optimize the structure of energy consumption, solve the contradiction between energy supply and demand, promote energy conservation and emission reduction, and protect the environment. Microscopically, solar power generation from the construction to the grid generation, there is no waste and no energy consumption, but also can continue to generate electricity. Solar power projects in rural areas will be more effective in promoting energy-saving emission reduction, will guide more families to use new energy sources, so as to better protect the environment.

2.Increase the income
Home solar power system in rural areas is mainly composed of photovoltaic power station, roof solar power stations, agricultural greenhouse solar power station, barren hills power station and so on rural household solar power, for now, is the most widely used is rooftop solar power systems. The main benefit is composed of the saved electricity fees + surplus electricity sale income + subsidies. Its main advantage lies in stable monthly income.

3.Promote the healthy development of photovoltaic industry
With the gradual depletion of traditional energy sources, the deterioration of the environment, the use of new energy sources will become the mainstream in future. Compared with western countries, Chinese new energy development is far behind. While the rural area has a large inventory of greenhouse roof space, and water resources, rich hills, is an important market for photovoltaic power generation, so the PV development in rural areas will make Chinese new energy utilization and development strive for further improvement.

SSP3115C Low Frequency Pure Sine Wave Solar Inverter System For Home

Key Features:
1.Built-in MPPT solar controller
2.Pure sine wave output
3.Low frequency design.
4.The charging current is big up to 85 Amp
5.Output power factor:s 0.9-1
6.Automatically transfer between battery and line modes
7.Microprocessor control guarantees high reliability
8.Remote control function
9.Four-steps intelligent charging control to recharging time
10.Bypass and bypass voltage regulation function
11.With AVR function (optional)
12.Mains/solar output priority level for the customer to choose .
13.Mains/solar/ mains & solar charging three mode of priorities for the customer to choose .
14.Battery type can choose from 0-9

Learn more details

The advantages of solar power is obvious, but there is always a misunderstanding of everyone. Do solar panels produce radiation?
Solar power generation convert solar energy directly into DC power through the characteristics of semiconductor, into direct current power, and then convert DC power into alternating current which can be used by load. There is no chemical change and nuclear reaction, so solar power will not have short wave radiation. While the commercial solar inverter is just a common electronic products, althrough there is the IGBT or a transistor inside, only with dozens of switching frequency, but all the solar inverters have a metal shell, which can greatly shield the radiation, and in accordance with the provisions of the global electromagnetic compatibility certification.

What is radiation?

The meaning of radiation is very broad, light radiation, electromagnetic radiation, particle flow is radiation, heat is radiation. So it is clear that we are in a variety of radiation.

What kind of radiation is harmful to people?

In general, people say “radiation” refers to the harmful effects of radiation on the body’s cells, which may cause cancer, or which has a high probability of causing genetic variation. These radiation generally is short wave radiation and some high energy particle flow.

Wi-Fi VS solar power system, which radiation is higher?

Wi-Fi radiation has been criticized, many pregnant women are far away from it. Wi-Fi is actually a small LAN, mainly to do data transmission. As a wireless device, the Wi-Fi has a transmitter that does produce electromagnetic radiation around it. However, the average Wi-Fi operating power between 30 ~ 500 MW, which is small compared to ordinary mobile phone (0.125 ~ 2 watts). Compared to mobile phones, Wi-Fi devices is far away from the users, which radiation density is much smaller. If you really afraid of radiation, just put down your phone.

SSP3111C 1-2KVA Modified Sine Wave Solar Power Inverter For Home With PWM Solar Charge Controller

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.

Learn more details