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  •  Is There A Radiation In The Solar Home System
    Is There A Radiation In The Solar Home System 2017-09-26

    With the popularity of photovoltaic, there are many people want to know: the roof installed so many PV modules, inverter output so much current, there is no electromagnetic radiation, the human body and home appliances have no effect? What is electromagnetic radiation What is radiation? It refers to the object in the form of waves or particles to the surrounding space to launch energy process. All the objects in nature as long as the temperature above absolute zero, will be in the form of electromagnetic waves or particles kept to the outside world to send energy, in other words, the world has radiation, including the body itself, all the time in the outward radiation , Such as the sun, in fact, is to accept the sun's radiation. However, not all of the radiation is harmful, and some even inseparable from it, such as the sun's radiation - the sun, the earth's growth needs all the sun. Although the electromagnetic radiation does not change the molecular nature of the organism, causing direct damage, but if the energy is large, will also have a certain impact on the organism, reflected in two aspects: thermal effects and induced current. Household equipment can also cause interference, such as cell phones, radios and televisions. The generation of electromagnetic radiation According to the basic theory of electromagnetism, there will be a corresponding electric field distribution around the charged particles. The charged particles will change with time. If there is a potential difference between the two points with different potentials around the charged particles, Voltage; when a large number of charged particles move when the formation of the current, the current around the magnetic field, with the time of the current will change the magnetic field. Similarly, the time-varying magnetic field can also produce electric field, so that changes in the electric field and the magnetic field alternately generated, perpendicular to each other and continue to spread to the space, resulting in electromagnetic radiation. Electromagnetic radiation carried by the size of the energy depends on the frequency of the high and low frequency, the greater the energy. Electromagnetic radiation of photovoltaic systems PV system is composed of photovoltaic modules, brackets, DC cables, inverters, AC cables, power distribution cabinets, transformers and other components, which stent is not charged, naturally does not produce electromagnetic interference. PV modules and DC cables, which are DC current, the direction does not change, can only produce electric field, can not produce magnetic field. Although the output transformer is AC, but the frequency is very low, only 50Hz, the resulting magnetic field is very low. Inverter is the DC power into the AC equipment, which has a power electronic transformation, the frequency is generally 5-20KHz, it will produce alternating electric field, it will also produce electromagnetic radiation. The state has strict standards for elec...

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  • Factors Affecting the Service Life of Solar Street Lamp Controllers
    Factors Affecting the Service Life of Solar Street Lamp Controllers 2017-09-22

    Solar street lamp controller warranty period is how long, the design life is how long, which is a lot of the purchase of the controller of the technical staff and procurement staff are most concerned about one of the problems, then the solar street lamp controller by which the life The impact of it, and now I am one by one analysis:    A: The choice of controller components related    Components to choose the preferred solar controller to determine the service life, some manufacturers in order to save costs, choose some of the lack of precision, poor resistance components, Month, as many as six months, component performance failure, the controller or no high and low voltage protection, or can not normally detect the voltage, resulting in street lights can not work, serious damage to the battery.    Second: the controller of the processing technology    Some small workshops using manual plug-in, man-made easily lead to errors, some resistance plug in, some capacitors inserted wrong. Affecting the life of solar street light controller. Anhui JNGE Power uses all-chip technology, machine operation, to reduce the artificial bad.   Three: waterproof level    Solar street light controller is generally installed in the outdoors, 365 days of uninterrupted work, the use of the environment is very bad, if not all waterproof, or installed in a waterproof box, over time, it is easy to cause short-circuit internal electronic components. Cause bad. Anhui JNGE Power solar controller with full glue technology, waterproof rating IP68. Can adapt to any harsh working environment.

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  • Common Failures of Solar System Controllers
    Common Failures of Solar System Controllers 2017-09-11

    Off-grid solar system controller common faults are mainly divided into: can not be charged, the charging current is too small, the battery power consumption fast, the load can not work.Let's do some analysis about the specific problem as bellows: Ⅰ.The solar panel can not charge the battery 1.To confirm whether the solar panel connection is correct, if the positive and negative is reversed or not. 2. If the solar panels are blocked. 3. If the solar panel specifications are correct,whether the open circuit voltage meets the requirements of the controller. 4. If the power of the solar panel exceed the controller's rated system.When the power is too large, may lead to solar intelligent controller burned. 5. If the battery is full, when the battery is full of controller,it will into the floating stage, the charging current will become very small. Ⅱ.Battery power is not enough, will no electricity soon 1. If the battery capacity design is reasonable, too small for the capacity, the use of natural time is short. 2. Battery aging, the battery life is generally 2-3 years, the battery capacity attenuation is very large, need to regularly replace the battery. 3. If the battery have a short circuit during the installation process,Short-circuit damaged battery,the capacity is reduced too much. 4. The load power exceeds the design power. Ⅲ.The load does not work 1. To confirm the operating voltage of the load is the same as the controller output voltage 2. If there is no short circuit and overload of the load 3. If the controller load output has not been turned off by manually 4. If the battery voltage is too low or too high lead to controller load protection 5. Whether the load output has a delay setting

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  • Photovoltaic Development in Recently Years
    Photovoltaic Development in Recently Years 2017-09-05

    In recent years, the structure of energy consumption in China has been continuously optimized. The proportion of clean energy consumption continued to rise, the proportion of coal consumption continued to decline, the rapid growth of renewable energy installed capacity. Renewable energy has entered the stage of large-scale development. By the end of 2016, China's installed capacity of renewable energy power generation reached 570 million kilowatts, accounting for about 35% of all power installed capacity. Non fossil energy utilization accounted for 13.3% of primary energy consumption, 3.9 percentage points higher than in 2010, and the annual utilization of all renewable energy reached 5.5 tons of standard coal. At the same time, China has gradually moved from the big country of renewable energy utilization to the renewable energy technology industry, and the level of technology and equipment has been significantly improved. The whole industry chain of wind power has been basically realized, and the efficiency of the new photovoltaic battery technology has been continuously improved. While continuing to promote the growth of renewable energy sources, it is also committed to exploring renewable energy industry innovation. Through photovoltaic agriculture, photovoltaic fisheries and other "photovoltaic +" project, the implementation of photovoltaic poverty alleviation. Green, low-carbon, energy saving and environmental protection have become the trend of the times. Optimizing the energy structure and developing renewable energy has become a consensus among all walks of life. China recently released economic and Technical Research Institute of petroleum 2017 edition "Outlook" 2050 world energy and China report, China's primary energy consumption structure is clean, low carbon, natural gas and non fossil energy and other clean energy will become the new energy subject before 2030.

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  • MPPT Controller details introduction
    MPPT Controller details introduction 2017-09-01

    MPPT controller full name is Maximum Power Point Tracking solar controller, is the traditional solar charge and discharge controller upgrade products. The MPPT controller can detect the generation voltage of the solar panel in real time and track the maximum voltage and current value (VI), allowing the system to charge the battery with maximum power output. Used in solar photovoltaic systems, coordination of solar panels, batteries, load work, is the photovoltaic system of the brain. The maximum power point tracking system is an electrical system capable of outputting more power by adjusting the working state of the electrical module so that the direct current generated by the solar panel can be effectively stored in the battery, which can effectively solve the problem that the conventional power grid can not cover Of remote areas and tourism areas of living and industrial electricity, does not produce environmental pollution. 1. What is the role of MPPT? As the solar cell received light intensity and environmental factors such as the impact of external factors, the output power is changing, the intensity of the power emitted by more, with MPPT maximum power tracking inverter is to make full use of solar cells, so that the operation At maximum power point. That is, in the case of the same solar radiation, MPPT after the output power will be higher than before MPPT, which is the role of MPPT. It is assumed that MPPT has not yet begun to track, then the component output voltage is 500V, and then MPPT began to track, began to adjust the circuit through the internal circuit resistance to change the component output voltage, while changing the output current, until the output Power is the largest (assuming 550V maximum), then continue to track, so that is in the case of solar radiation in the case of components in the 550V output voltage, the output power will be higher than 500V, which is MPPT The role. 2. The principle of maximum power point tracking With the development of electronic technology, the current solar cell array MPPT control is generally through the DC / DC converter circuit to complete. The photovoltaic cell array is connected to the load via a DC / DC circuit. The maximum power tracking device continuously detects the current and voltage variations of the PV array and adjusts the duty cycle of the PWM drive signal of the DC / DC converter according to its variation. For a linear circuit, when the load resistance is equal to the internal resistance of the power supply, the power supply has the maximum power output. Although the photovoltaic cells and DC / DC converter circuits are strongly non-linear, but in a very short period of time, can be considered a linear circuit. Therefore, as long as the DC-DC conversion circuit to adjust the equivalent resistance so that it is always equal to the internal resistance of photovoltaic cells, you can achieve the maximum output of photovoltaic cells, also realized the photovoltaic cell MPPT. 3.MP...

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  • Photovoltaic situation this year (2017)
    Photovoltaic situation this year (2017) 2017-08-26

    Last year, "6 - 30" rush installed tide, pulling the upper reaches of photovoltaic production capacity, which also brought good performance photovoltaic enterprises. Statistics show that from 2016, 42 A shares of photovoltaic listed companies performance, only two losses. In the 40 growth companies, 11 are expected to achieve a profit increase of more than 100% in 2016 attributable to shareholders of listed companies. With the adjustment of the price of electricity this year, 6 - 30 rush to install the tide will be back, the performance of photovoltaic enterprises is worth looking forward to. According to Wind statistics show that in 18 PV has a semi annual disclosure of earnings forecast of listed companies, pre growth, a slight increase, continued earnings, losses and other pre hi companies reached 13, accounting for 72%. In 13 pre hi companies, net profit is expected to double the 5 companies, including section Hengsheng, Fangda group, cnfits group, Colin green and crystal Sheng electrical. The performance of these companies increased significantly, mainly in the first half of the rush to install the relevant. Among them, the Li Group expects the first half of this year, net profit of 33 million 870 thousand to 50 million 810 thousand yuan, year on year turnaround. Fangda Group expects the first half of the net profit of 200 million yuan to 250 million yuan, an increase of 276.25% to 370.31%. In addition, the central shares is expected this year 1~6 months attributable to shareholders of listed companies, the net profit of 270 million yuan to 320 million yuan, an increase of 27.58%. In this regard, the photovoltaic industry expert Zhao Yuwen said: "this year," 6 - 30 "before the installed capacity of photovoltaic enterprises is bigger than last year '6 - 30' before, reproduction to grab loading tide upstream single polysilicon enterprises and component enterprises shipments improved, so the first half of this year the photovoltaic enterprise performance the rise will be greater than the first half of last year performance increases."

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