Install photovoltaic grid investments "threshold"

From the end of last year, the State Grid Corporation of well distributed photovoltaic power generation and network services work, so far, Shanghai has 20 user submitted to the Shanghai Electric Power Company grid application. Yang Ying, the marketing department of the municipal power company, said recently in an interview with reporters, distributed photovoltaic power generation and network business in the city has been successful "open door", I believe that with the relevant departments to further increase in the future to support the development of clean energy subsidies, appears more interested users.

"At the same time, the government should expedite the development of related normative documents and rules for the operation of the entire market to truly 'hot' up before the equipment procurement, installation and commissioning of these until security grid linking the intermediate links." Yang Ying said. In the city has been submitted and the user network applications, six residents of individual users, they distributed photovoltaic solar regulator devices have all grid operation. According to statistics, these individuals a total installed capacity of 20 kilowatts, according to the Shanghai sunshine situation estimate the average annual power generation of 25,000, saving the equivalent of 8.4 tons of standard coal.

As for the "selling power", whether it is government documents under the business users or no criteria to guide the individual user desulfurization of coal-fired electricity in Shanghai, now the reference implementation of 0.4773 yuan per kilowatt standard. Future state if the introduction of individual users 'to sell electricity' standard, the that time again 'Duotuishaobu the' power company staff told reporters, opened and network business, to consult the people understand the policy very much, but as of now only six applications and network success. Why?

The first is the investment threshold. For the pursuit of the photoelectric conversion efficiency to maximize the light board to the laying of the south-facing slope angle of 25 degrees to 40 degrees and the ground was. Under ideal conditions, ordinary family of three, if you want to achieve hair, electricity self-sufficiency, need to install about 3000 watts of PV solar panels cost devices. Based on current market prices, the total cost of this equipment is about 40,000 yuan, the average life expectancy of 25 years, 10 years to recover the investment, covers an area of ​​nearly 30 square meters - regardless of the economic costs or an area, individual users are a "threshold".

Followed by the installation threshold. The personal user applications distributed PV projects, the industry committee to provide the residential area and adjacent owners agree to install "prove issued. Electric Power Company, a staff member told reporters that many applicants are "down" on this license, "Some of the roof of the residential monocrystalline solar panel water heaters, PV projects to be built was the first water heater moved, available water heaters owner was not happy. '

In addition, the distributed PV projects will cause some reflective photovoltaic equipment on the market and almost no retail channels ... in view of the actual situation of shortage of land, built-up in Shanghai, Yang Ying said, want to promote large-scale distributed PV projects in the city is difficult , photovoltaic power generation systems are more suitable for independent or semi-independent villa factors larger roof area units and some university enterprise Demonstration Garden, by land, in the central city to large-scale promotion of a certain degree of difficulty, has applied for individual users mostly photovoltaic industry practitioners. "

Overall quality of PV projects involving various aspects of the quality of the equipment, installation, housing structure, the detection of the power sector is difficult to cover all aspects, particularly in the area of ​​housing structure, the user should be invited to a professional third party for examination, for example, a building roof load-bearing, wind, lightning, and other effects. For example, count the photovoltaic panels, steel frame, cement tanks, 1000 watt photovoltaic devices need to set up in part of the roof on the total weight of about 300 pounds or more, "For example, some transformation due to appearance and environmental needs 'flat slope' roof, can not load-bearing, mainly from the landscaping. "

"At present, six individual users because all insiders, very familiar with related technologies have been tested, they installed equipment quality is also very good. If you later 'spread to' do, the quality of individual projects is relatively difficult to guarantee." Yang Ying said. According to reports, the power sector has been made to the relevant government departments to make recommendations, I hope as soon as possible to develop normative documents distributed PV project construction process clear how the structure of the housing can be installed, many years Fangling housing can be installed, as well as photovoltaic group pieces and how standards are met inverter must purchase equipment. In new construction projects, photovoltaic demand into consideration of the architectural design stage.

Meanwhile, the reporter learned from the Municipal Electric Power Research Institute technology research and development of grid technology center room, access a large number of power quality uneven distributed power grid may cause voltage fluctuations, voltage deviation, this mains EPRI has in recent years carried out a series of targeted research. According to technology R & D Office Senior Engineer Liu Jinsong, Shanghai power grid more "tolerant, strong, City EPRI construction of wind, light, storage technology, new energy technology laboratory", "photovoltaic inverter grid detection platform and other equipment, long-term commitment to the power quality, power output control, voltage and frequency DISTURBANCE 6 research.