13 major FAQs about photovoltaic power that you don't know
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13 major FAQs about photovoltaic power that you don't know

Views: 77     Author: Site Editor     Publish Time: 2019-04-30      Origin: Site

Q1: Is solar power generated by radiation or pollution?

A1: The power expert said: "At present, from the perspective of operation, solar power is not radiated and polluted. However, there will be battery and noise problems. The electronic equipment will have noise during operation, but within the controllable planning. The battery is similar to the mobile phone and camera. There are small doses of radiation, such as batteries, but it won't be a big problem. Whether the solar panels are recycled or not depends mainly on the data. If the crystalline silicon solar cells are recovered, there is not much pollution."

Q2: Will there be power shortage in winter?

A2: The amount of power generated by the solar system is indeed affected by temperature. The factors directly affecting the amount of power generation are the irradiation intensity and the duration of sunshine and the operating temperature of the solar module. In winter, the radiation intensity will be weakened, the duration of sunshine will be shortened, and the general power generation will decrease compared with summer. This is a normal phenomenon. The distributed solar system is connected to the national grid. As long as the grid has electricity, the household load will not present a lack of power and power outages.

Q3: Planning and installation methods for distributed solar power systems?

A3: The distributed solar power system can be installed in any place where there is sunshine: pavement, top of building, side fa?ade, balcony, etc. It is most widely used in schools, hospitals, shopping malls, villas, residents, factories, enterprises, roofs, carports, and bus stop signs. The device method has three types: concrete, color steel plate and tile type.

Q4: How is the distributed solar power subsidy fund issued to the owner?

A4: The solar power project can be built by the power user, and the contract energy management method can also be selected. Contract energy management companies should sign energy service agreements with power users in accordance with national regulations on contract energy management. The self-contained solar power of the user-built solar system is not for sale. The owner-owned solar power installed by the project owner on other power users' houses is settled by the project owner and the power user in accordance with the contract energy management agreement. For the excess solar energy on-grid, the grid companies can receive the national electricity quota subsidy for the measurement, calculation, and solar power system. According to the measurement data of solar energy, the grid enterprises transfer the state subsidy funds according to the settlement cycle in accordance with the tariff regulation of the national rules.

Q5: Will the solar power system still work if it is rainy or foggy after the installation? Will there be power shortage or power failure?

A5: Solar modules can also generate electricity on a cloudy day, but because of the continuous rain or smog, the solar irradiance is low, and the operating voltage of the solar system does not reach the inverter's starting voltage, then the system does not Will work. The grid-connected distributed solar power system and the distribution network are operated in parallel. When the solar system cannot meet the load demand or does not work because it is cloudy, the power of the grid will be actively compensated, and there is no power shortage and power failure.

Q6: Will distributed solar energy affect power quality?

A6: Power quality is the quality of electrical energy in a power system. The main targets for measuring power quality are voltage, frequency and waveform. The main AC/DC converter component of the system is the inverter. The inverter can pass the power quality test before it can be put into operation. The solar power system outputs the electric energy. After passing the national grid inspection, it is integrated into the grid. Therefore, distributed solar systems do not affect the quality of power.

Q7: Is the power generation monitoring of the distributed solar grid-connected system the same as the meter's metering data? How big is the error?

A7: The power generation monitoring data of the distributed solar grid-connected system and the metering data of the meter are not necessarily the same. If the same power metering device is used at the same grid point, the accuracy is exactly the same; then the data should be the same. However, the monitoring equipment used in the solar grid-connected system is often the equipment selected by the system construction unit, and the meter metering equipment is often the equipment of the power sector equipment, so the equipment is different, and the data obtained may have some gaps. The amount of error depends on the specific situation. The settlement of electricity and subsidy fees is based on the metering equipment of the power sector equipment.

Q8: How do you predict the amount of power generated by distributed solar grid-connected systems?

A8: To budget the amount of power generated by the solar power system, you need to know the effective sunshine time, system power, and device capacity of the system. For example, 1KW solar grid-connected system, the location of the installation is Beijing, the daily average sunshine time is 4 hours, and the solar grid-connected system power is called 80%, so the system daily power generation calculation formula = component device capacity × useful sunshine hours × System power = 1000 × 4 × 0.8 = 3200 wh, about 3.2 kWh.

Q9: How do users get the national electricity subsidy?

A9: The power grid enterprise is responsible for guiding and coordinating with the project unit to carry out the commissioning and acceptance of the grid-connected operation of the distributed photovoltaic power generation project, and signing the contract for the sale of electricity with the project unit. The grid enterprises measure the total power generation and on-grid power of the enterprise's distributed photovoltaic projects separately. Subsidies for the distribution of electricity by distributed photovoltaic power generation projects. The grid enterprises shall settle the on-grid electricity tariffs with the project unit in accordance with the on-grid tariffs stipulated by the state, and transfer the state subsidy funds to the project units on a monthly basis according to the national power-subsidy policy.

Q10: What are the advantages of industrial and commercial user equipment solar power generation systems?

A10: Advantages of industrial and commercial user equipment solar power generation system: industrial and commercial power consumption is large, electricity price is high, self-use share is large, cost recovery period is short, and yield is high; in addition, solar energy system has social benefits of energy saving and emission reduction, which can help industrial users. End energy conservation and emission reduction targets, especially in pilot cities with low carbon sales.

Q11: Is there any noise damage in the solar power system?

A11: The solar power generation system converts solar energy into electric energy without noise impact. The noise target of the inverter is not higher than 65 decibels, and there is no noise impact.

Q12: Does the shadow of the house, the leaves and even the bird droppings on the solar modules affect the power generation system?

A12: The shadows on the house on the solar module, the leaves and the obscuration of bird droppings will have a relatively large impact on the power generation system. The characteristics of the solar cells used in each component are basically the same, and the so-called hot spot effect does not occur on batteries that have poor electrical functions or are blocked. The solar cell module covered in a series branch will be used as the load to consume other light-emitting solar cell components. The covered solar cell module will heat up at this time. This is the hot spot phenomenon. This phenomenon is severe. The condition of the solar battery unit will be damaged. In order to avoid the hot spot of the series branch, it is required to install a bypass diode on the solar module. In order to avoid the hot spot of the parallel circuit, it is required to ensure that the device is DC steady on the solar array without any heat spot, even if there is no hot spot effect, the solar cell The cover will also affect the amount of electricity generated.

Q13: Which conditions may appear to be in the process of failure or failure?

A13: The prefecture-level city or county-level energy authority shall complete the review and review and review the project unit within 10 working days from the date of accepting the project request. When the request intent accumulation plan exceeds the annual guidance plan of the region, the local energy director shall issue a notice to suspend the acceptance of the project record request. During the useful period of the distributed solar power project, if the project is not completed and put into production without special reasons, the project record file will be invalidated.

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