Hengdian Group DMEGC Company Limited will be installed in the company roof the 20.709 MW user side roof photovoltaic power generation system. East magnetic Company "20.709 MW user side rooftop photovoltaic power generation demonstration projects" using the same company produce 190 watt monocrystalline components and 240 watt polycrystalline silicon components.

Understanding of the project will utilize the company photovoltaic park DMEGC Hutou land Industrial Zone, East Zone C plant 216,000 square meters of the roof, install 20.709 megawatts of solar modules At present, the largest single use of its own plant roof engineering, is the provincial key projects. The total project investment of about 248.5 million yuan, can enjoy state financial subsidies to 113.8 million yuan. Project operation period of 25 years after completion, with an average annual generation of 19,187,100 kwh.

Compared with thermal power, the annual savings of about 6407.79 tons of standard coal and reduce carbon dioxide emissions 15,378.69 tons, reduce sulfur dioxide emissions by 128.16 tons, 256.33 tons of nitrogen oxides, 64.06 tons of soot, has significant social and environmental benefits. The project is expected to complete the preparatory work before the end of June 2012, the civil construction began in July, the end of November to complete the installation into debugging, completed and put into operation in December.

The paper analyzes the PV inverter technology development route, focus and direction of the future development of grid tie inverter technology, given the technical characteristics of the micro-grid inverter and typical application cases, and finally a brief introduction to Beijing Quinlan new energy technology research and development.

Before the rise of the photovoltaic industry, inverter or inverter technology is applied to such as rail transport, power and other industries. When the rise of the PV industry, photovoltaic inverter becomes the core equipment in the new energy power generation system, followed by the familiar. Developed countries, especially in Europe and the United States enjoys popular support because of the concept of energy saving and environmental protection, carried out earlier by the photovoltaic market, especially household photovoltaic systems, rapid development, home inverter has been as household electrical appliances in use in many countries, the penetration rate is higher .

PV inverter to convert the direct current generated by the PV modules into AC feed into the grid determines the generation of power quality and power generation efficiency, performance and reliability of the inverter, the PV inverter in a photovoltaic power generation system core position.

Which occupy the major market share in all categories in grid-connected grid tie power inverter, to all inverter technology development a start. Relative to other types of inverters, grid-connected inverter technically relatively simple focus on the PV input and grid output capable of safe, reliable, efficient, high-quality output power to become the type of inverter focus measure technical indicators. Formulated in different countries, a photovoltaic inverter grid technical conditions, these points become the standard common measure point, of course, the details of the parameters differ.

All technical requirements for grid-connected inverter, are around to meet the power requirements of distributed power generation systems expand, the more demands from the grid inverter, namely the top-down requirements requirements such as voltage and frequency specifications, power quality, security, fault when in control requirements. And how grid requirements incorporated into what the voltage level of the power grid, and so on, grid type inverter is always to meet the requirements of the grid, it does not come from within the power generation system requirements.