According to the different development stages of solar photovoltaic power technology and products, adopt different market access standards; take not mandatory for optical fiber communication, does not require the low voltage ride through or require the grid to detect simplified grid measures to ensure the smooth distributed photovoltaic grid. In June, the photovoltaic industry new policy taken place frequently, targeting the overall industrial technology upgrade slowly, the development of grid technical standard missing. Recently, the National Energy Bureau, Ministry of industry and information technology, CNCA jointly issued "About the promotion of solar photovoltaic products advanced technology application and industrial upgrading opinions (hereinafter referred to as the" opinions "). In addition, the project of “ Research on key technical standards for grid connected photovoltaic power generation”in early 6 has been acceptance inspection. From the two aspects of the manufacture and application of the market, photovoltaic technology products and power grid access standards in China will double upgrade.
"China's photovoltaic industry scale ranks first in the world, behind this aura rely on the size of benefit, rather than technical and quality benefits. If the PV industry in China is still playing 'world's factory' role, the road will be unsustainable in the future. "China renewable energy Society of vice president Meng Xiangan in an interview with the author said that, China's photovoltaic technology and industrial product applications urgent need to upgrade, this is a" must do it "thing. The PV market access standards for circulation of progressive mechanism, which means it will be a continuous and long-term photovoltaic industry knockout.
The first round standards are not high and will be circulation in the future
In the photovoltaic market access standards, "opinions" on the photoelectric conversion efficiency and the decay rate of two indicators put forward the quantitative criteria. Among them, the solar photovoltaic power generation projects newly purchased PV modules should meet the Ministry of Industry and Information Technology "PV manufacturing industry norm conditions" (2015 present) Related products technical requirements, such as photoelectric conversion efficiency of polycrystalline silicon cells and battery pack assembly, respectively not less than 15.5% and 16%,HCPV module photoelectric conversion efficiency is not less than 28%.
Data show that, currently China's large-scale industrial production of monocrystalline silicon cell photovoltaic conversion efficiency are about 19%, the photoelectric conversion efficiency of polycrystalline silicon cells are about 18%. "The decline in the conversion efficiency of the battery components based on the data were about 2 percentage points. Not difficult to see," Opinions "put forward by the first round of 'threshold' is not high, China's photovoltaic manufacturing enterprises are generally reached standard." Mengxian Gan said.
In order to further improve the relevant enterprises to establish awareness of the technology advantages, < Opinion> also clear, National Energy Bureau each year will arrange size of specialized market plans to implement the "leader", requirements for the use of advanced technology products in the project. It is reported that the "leader" plan requirement on advanced technology products more high, such as the photoelectric conversion efficiency of polycrystalline silicon solar cell components and monocrystalline silicon solar cells components reached 16.5% and 17%.
"As like the currently China to boost distributed solar off grid system applications in advance demonstration area, to carry out the 'leader' program, and more higher demands for its technology products, to a certain extent, is to give the latest PV technologies and business models to establish use Referring to the benchmark, accelerate backward production capacity out of the market , advanced technology products to market faster, and promote the photovoltaic industry overall rapid technological upgrading. "Mengxian Gan said.
It is worth noting that, "opinions” is put forward in the standard photovoltaic products market access at the same time, also attached a sentence: the index will be adjusted according to the industrial development.
"Gradually establish a market access standards for PV cycle progression mechanisms, photovoltaic technology will accelerate progress and industrial upgrading." Mengxian Gan pointed out, according to the different stages of the development of photovoltaic technology and products, adopt differentiated market access standards, will support in favor of advanced technology products to expand the market, accelerate the elimination of backward technology products, standardize photovoltaic technology and quality supervision management. According to his analysis, the next photoelectric conversion efficiency of polycrystalline silicon and monocrystalline silicon modules battery components market access standards will increase 0.3% to 0.5% per year.
PV grid standard system to speed up the improvement process
Upstream and photovoltaic manufacturing photovoltaic products due to technological upgrading slow, and lack of core competitiveness in international markets, like photovoltaic applications for domestic market, the lack of grid standards, has become the main obstacle to promote its further development.
Grid technology standards is to protect the photovoltaic grid connected reliably, the foundation of safe and stable operation and high consumptive. I understand that, on June 3, "study on key of technical standards for grid connected photovoltaic power generation” project through acceptance. This means that, to improve the standard of the photovoltaic power generation system will be set up in China, for China on grid solar power system plant construction, acceptance, operation and maintenance to provide comprehensive guidance.
Participation and commitment of the project research China EPRI Guoqing, deputy director of the Energy Research Institute in New interview with this reporter, said, "PV gateway and key technical standards study" by the China Electricity Council, led the project to build of China's photovoltaic power generation and network standards framework, including universal basis, survey and design, construction inspection and quality assessment, maintenance and operation of the network and detect four broad categories of more than 80 criteria. The project also developed in line with China's national conditions of the photovoltaic power generation and grid national standards 13, 11 industry standards, have been published or submitted for approval.
Guoqing He told the author, for large terrestrial photovoltaic power plant,the grid characteristics and wind have a lot in common, so the formulation of the standard photovoltaic power station to make full use of the experience and lessons of the wind turbine standards, < photovoltaic power station is connected to the electric power system technology regulations > in the active power change rate, low voltage ride through (LVRT), grid adaptation, with the same also different, highlighting the photovoltaic short-time power changes faster, the inverter control performance is better.
"With the wind power mainly centralized development is different, photovoltaic power generation market have a large number of distributed development ways, because of the distributed development over a broad area, a single small capacity, less investment, high standard grid will greatly increase the cost of grid. “The provisions on the access distribution network technology” said for distributed took not mandatory for the optical fiber communication, does not require low the voltage crossing, does not require the grid detection measures to protect the simplified grid, distributed photovoltaic grid connected smoothly." Guoqing He introduced. According to the information monitoring, because don’t require distributed optical fiber communication network on the volt, brings great difficulties to the development of distributed PV grid monitoring, currently distributed PV are unpredictable, not monitoring, uncontrollable state. When the distributed solar PV power capacity reaches a certain proportion in certain areas, will be running on the grid with a greater risk.
"To this end, we have launched a distributed photovoltaic power grid control technology research and operational forecasting, a subregional, meshed manner distributed photovoltaic forecasting and monitoring, it can achieve one time 15 minutes of running information collection and storage , greatly improve the controllability of distributed PV understood. "He Guoqing said that, at present the technology has been in Beijing and Jiangsu have demonstration application, after further maturation can be applied across the country, not only help to improve the running stability of the grid, further It can be used to assess the quality of supervision and photovoltaic technologies.
