Grid-connected PV inverters are grid-connected photovoltaic power generation system is one of the important parts, the main role is to DC power into AC power supplied to the load using a conversion device, it is the inverse transform rectifier functional devices. As grid-connected PV system sends a DC, if you want to AC load power supply, should be equipped with an inverter. Inverter is through the semiconductor power switches on and off function, the DC energy into AC power, the inverse transform is rectified.
In view of grid-connected PV solar inverters importance, its quality will directly affect the safety of the local power grid, and the user's personal and property safety, for the national "Golden Sun Demonstration Project" in the requirements and power generation systems are key components to go through domestic product certification. However,
photovoltaic standard system is not perfect, no country has issued the relevant
grid inverter national standards and industry standards, product certification,
lack of technical basis, which is 's grid-connected inverter and
technology to enhance product quality evaluation, and even our country and the
development of grid-connected photovoltaic power generation market has a
negative impact. China
August 2009, by the Beijing Certification Center, led Hefei Sunlight Solar Power Co., Ltd., Beijing Corona, China Electric Power Research Institute and other units involved, in accordance with the national commission "authentication technology standard management approach" and "authentication technology standardize management implementation details "requirement, jointly drafted a certified technical specifications CGC/GF001: 2009" 400V less grid-connected photovoltaic inverter dedicated technical requirements and test methods ", and successfully in the National Certification and Accreditation Administration of the record, the record number : CNCA/CTS0004-2009.
In grid-connected photovoltaic inverter for national standards, the absence of industry standards, technical specifications of the certification issued and implemented for our grid-connected photovoltaic inverter healthy development of a scientific and reasonable technical basis. The main technical specifications of the certification requirements include: performance and safety in two parts. Performance section of the grid in accordance with the requirements of the development, including: power quality and protection. Among them, the power quality of the test items are inverter gridtiepowerinverteronline efficiency, grid current harmonics, power factor, voltage, operating frequency, the DC component and the noise;
Protection function test items are grid fault protection, anti-anti-discharge protection, reverse polarity protection, overload protection, anti-islanding test. Security section on domestic and international relevant standards, including: Electromagnetic compatibility and insulation, in which electromagnetic compatibility including: voltage fluctuations and flicker, emission requirements, immunity; insulation in accordance with requirements of the development of the electricity sector, including: Insulation resistance and dielectric strength. Overall, the technical specification is in line with
's national conditions, with
the international advanced level of technology standards. China