标题: 62109-2对于隔离型逆变器的要求 [打印本页] 作者: 海之未央 时间: 2012-11-27 15:44 标题: 62109-2对于隔离型逆变器的要求 对于IEC62109-2好像对隔离有要求,如4.4.4.15.2 Fault-tolerance of automatic disconnecting means,里面明确写了be such that with a single fault applied to the disconnection means or to any other location in the inverter, at least basic insulation or simple separation is maintained between the PV array and the mains when the disconnecting means is intended to be in the open state. / g3 x% W+ T& T8 A0 e" t. x5 F$ `( q; v! {( X( ?5 }
那么意味着任意单点故障的时候我们逆变器依然要满足基本绝缘才行,,,,,那么对于内置隔离变压器的隔离型逆变器,,,该怎样来满足这个要求呢? 是否在AC输出这边一定要有relay? " R1 x4 _+ O" ]% `9 h+ q% A 作者: houfengp83 时间: 2012-12-1 00:26
隔离变压器已经在PV与电网之间起到基本绝缘的隔离,自然可以不要继电器,相反的没有隔离变压器的则需要二级继电器来实现基本绝缘作者: vaimar21 时间: 2012-12-10 14:41
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我同意那簽證官的說法,IEC 62109-2 中4.4.4.15.2.2 Design of insulation or separation—Note 1里有說明:; P* E/ W4 m- }. _' h# ?) C/ I, {! H" l
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NOTE 1 These requirements are intended to protect workers who are servicing the AC mains system. In that scenario the mains will be disconnected, and the hazard being protected against is the array voltage appearing on the disconnected mains wiring, either phase-to-phase, or phase-to-earth. Therefore it is the PV array parameters (working voltage, impulse withstand voltage, and temporary over-voltage) that determine the required insulation or separation. The worker may be in a different location than any PV disconnection means located between the array and the inverter, or may not have access, so the insulation or separation provided in the inverter must be relied on. In a non-isolated inverter, only the required automatic disconnection means separates the mains service worker from the PV voltage. In an isolated inverter, the isolation transformer and other isolation components are in series with the automatic disconnection means, and separate the worker from the PV voltage in the event of failure of the automatic disconnection means.作者: 戏尘 时间: 2012-12-14 16:36