How to solve the four major problems of photovoltaic power generation

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Friend, first of all, it's very expensive!

A netizen's home optoelectronic system.

In addition, a netizen made an appointment with the photovoltaic connected to the grid, and only generates more than 30 kWh of electricity ...... a day

People don't dare to calculate carefully, just help you roughly push it first (I don't know the specific ** in Jining), at least the following things are needed:

First of all, it is recommended to use 24V or preferably 48V or above the inverter system inverter, the inverter should be high enough power, if the 2000W inverter is of medium to lower quality, about 5000 yuan, (direct current is used directly for lighting, not the same as the inverter).

100 kWh = 100,000Wh, calculated based on 10 hours of photoelectric power generation per day, considering the prevention of a certain amount of light influence, and using a battery to store a certain amount of power, a photoelectric panel close to 10kw, at least 8kw, is required.

10KW photovoltaic panel calculation, 140W about 400 yuan (full power, average quality, and not considering the freight) to 72 pieces, 75 pieces of calculation.

75 * 400 = 30,000 yuan (without considering freight). If rainy days are considered, the coefficient should be multiplied by the above, and it is recommended to use 2 times the above.

Battery, it is recommended to directly use 200Ah large-capacity 12V lead-acid battery battery, this specification of maintenance-free lead-acid battery on the market is about 1100 yuan a (camel brand), with a reserve of 100 kWh as the benchmark, about 48 (can prevent rainy days to a certain extent), 46 * 1100 = ......It is recommended to use a 48V system, every 4 in series as a group, and then each group in parallel.

A certain number and quality of solar (charging) controllers, **unknown (the scale is too large and I don't know how to calculate, at present** the controller of 12V 24V 30A is about 110 yuan, and your best is to use 48V, calculate about 208A - calculated with 10KW power photovoltaic panel).

5.The corresponding solar panel bracket is calculated based on the bracket consumables and labor cost of 50 yuan for a board, which is about 72*50=3600

There are a number of wires, which are connected with copper wires of at least 5 square millimeters or more, which is another ......

6.I am a non-professional, just love solar energy, usually go to the relevant ** shopping, but also solar energy beneficiaries, there is a microsystem at home: 200W electric board + 200AH battery + 1000W inverter + 20A controller + LED (the whole system has no bracket, less wire) ......So the above is for reference only.

In addition, with such a large scale, it is recommended that you find a well-known solar energy resource company such as Yili (the sound is this, I forgot the specific word) to help you design, purchase materials and construct assembly ...... from itIt may be a little more expensive than getting it yourself, but the quality is very good, and in addition to money, there is almost no need to worry about it, and the performance of its family low-power system EPS500 system is still very good.

The cost of buying a battery is too expensive.

A photovoltaic power station is 40MWP, and the power quality problem is more intuitive through the trend chart.

1. Output curve of photovoltaic power station.

2. Harmonic voltage spectrogram.

3. Harmonic current spectrogram.

4. Short-term flickering.

5. Flicker for a long time.

6. Three-phase voltage unbalance.

7. Three-phase current unbalance.

There are still some "weaknesses" in solar photovoltaic power generation that need to be overcome. Its main drawbacks are low conversion rates, etc. However, with the advancement of technology, this is gradually changing.

Solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the near future, not only to replace part of the conventional energy, but also will become the world's largest energy body. It is estimated that by 2030, renewable energy will account for more than 30% of the total energy mix, and solar photovoltaic power generation will also account for more than 10% of the world's total electricity**; By 2040, renewable energy will account for more than 50% of total energy consumption, and solar photovoltaic power generation will account for more than 20% of total electricity; By the end of the 21st century, renewable energy will account for more than 80% of the energy mix, and solar power will account for more than 60%. These figures are enough to show the development prospects of the solar photovoltaic industry and its important strategic position in the energy field.

Photovoltaic power generation is based on the principle of photogenerated volt effect, using solar cells to directly convert sunlight energy into electrical energy. Regardless of whether it is used independently or connected to the grid for power generation, the photovoltaic power generation system is mainly composed of three parts: solar panels (modules), controllers and inverters, which are mainly composed of electronic components, but do not involve mechanical parts.

Therefore, photovoltaic power generation equipment is extremely refined, reliable, stable, long life, easy to install and maintain. Theoretically, photovoltaic power generation technology can be used in any occasion that requires power, from spacecraft to household power supply, to megawatt power stations, to small toys, photovoltaic power can be ubiquitous.