《《PV inverter seminar》.ppt

22.05.2002 Version FINAL Testing grid-connected PV-inverters for compliance in different countries并网型太阳能逆变器各国法规及测试要求 By Grady Ye Intertek Testing Services Guangzhou 2011-05 Typical Testing for PV Inverter并网型太阳能逆变器的主要测试项目 PVI Enclosure Design 外壳设计 (1/2) Outdoor use: Water, Dust, Temperature, UV, Corrosion 戶外使用: 防水、防尘、高低温、抗紫外线、抗腐蚀 US requirement: NEMA xx, tested to UL 50E 美国的要求: NEMA xx, 根据UL50E测试 PV-inverter commonly rated NEMA 3R 太阳能逆变器一般额定 3R NEMA 3R: Rain test 雨淋测试 外壳一般为铝或者不锈钢等防锈的金属 PVI Enclosure Design 外壳设计 (2/2) Gasket may be required and tested 防水垫圈需测试 European market: Follow the IPxx 歐洲市場用 IPxx 等級 IEC/EN 60529 to be followed 根据IEC/EN 60529测试 PV inverter is commonly rated IP65 or IP54 太阳能逆变器通常定为 IP65 or IP54 Spacings/Clearances/Creepages 距离要求 UL 1741: Basic requirement 12.7 mm (between live parts and enclosure) UL 1741基本距离要求定為12.7 mm (介与带电部份与外壳间的距离) Decided by “working voltage” “ mains voltage” which is influenced by DC input voltage and inverter topology. 距离要求由AC电压 实际工作电压決定，受DC输入电压大小与逆变器的设计架构影响很大。 GFDI (Ground Fault Detection/Interruption)接地故障侦测与断路器 UL 1741 requires a GFDI for PV-inverter to protect against fire hazard UL 1741要求太阳能逆变器要有GFDI以防止火灾 Four functions of GFDI GFDI須有四大功能： detecting a ground fault, 侦测接地故障 providing an indication of the fault, 指示故障 interrupting the flow of fault current, and 切断故障電流 either isolating the faulted array section or disabling the inverter to cease the export of power. 隔离故障光伏阵列或停止逆变器输出功率 Output overload test 输出过载测试 UL 1741 requires the output of the inverter be protected against overload. UL1741要求逆变器之输出必须具备过载保护 If protection is achieved by a software, firmware DSP ? The software shall be evaluated to UL1998 (additional cost and additional testing time), and sensing circuit shall be special evaluated. 如果由软件以及数位讯号处理器來作保护, 则要额外评估 UL1998 软件安全，並且其监测线路需要特別的评估 Surge Test 浪涌测试 UL 1741 requires GFDI subjected to surge testing UL 1741要求GFDI须经过浪涌测试 Ring wave surge: 0.5 ?s (10-90%), oscillatory wave 10 ?s, 3 kV /