阅读说明：本技术 光伏系统中的单容错隔离电阻确定 (Single fault tolerant isolation resistance determination in photovoltaic systems ) 是由 马丁·普茨 于 2018-03-23 设计创作，主要内容包括：本发明涉及一种用于对光伏系统(1)的隔离电阻进行单容错确定的方法。该光伏系统(1)包括逆变器(2)以及连接到所述逆变器的太阳能发电机(3)。根据在电阻器网络(8)中下降的测试电压来确定该隔离电阻。该电阻器网络(8)经由第一连接点(11)连接到该逆变器(2)的逆变桥(6)的中心点(5),经由第二连接点(12)连接到该太阳能发电机(3)的第一极(17),并且通过第三连接点(13)经由隔离继电器(9)连接到该逆变器(2)的接地连接点(15)。电容器(14)被布置在该接地连接点(15)与该太阳能发电机(3)的第一极(17)之间。该方法包括任意顺序的以下步骤：当该隔离继电器(9)闭合时,将该太阳能发电机(3)的第一极(17)连接到该第一连接点(11)(步骤21)；当该隔离继电器(9)闭合时,将该太阳能发电机(3)的第二极(18)连接到该第一连接点(11)(步骤22)；当该隔离继电器(9)闭合时,通过该逆变桥(6)在该第一连接点(11)处产生交流电压(步骤23)；以及当该隔离继电器(9)断开时,通过该逆变桥(6)在该第一连接点(11)处产生该交流电压(步骤24)。通过比较步骤23与24之间的测试电压的幅度来执行对该隔离继电器(9)的功能测试。本发明进一步涉及一种被设计成用于执行该方法的逆变器(2)。(The invention relates to a method for single fault-tolerant determination of an isolation resistance of a photovoltaic system (1). The photovoltaic system (1) comprises an inverter (2) and a solar generator (3) connected to the inverter. The isolation resistance is determined from a test voltage dropped in the resistor network (8). The resistor network (8) is connected via a first connection point (11) to a central point (5) of an inverter bridge (6) of the inverter (2), via a second connection point (12) to a first pole (17) of the solar generator (3), and via a third connection point (13) to a ground connection point (15) of the inverter (2) via an isolation relay (9). A capacitor (14) is arranged between the ground connection point (15) and the first pole (17) of the solar generator (3). The method comprises the following steps in any order: connecting a first pole (17) of the solar generator (3) to the first connection point (11) when the isolation relay (9) is closed (step 21); connecting a second pole (18) of the solar generator (3) to the first connection point (11) when the isolation relay (9) is closed (step 22); -generating an alternating voltage at the first connection point (11) by means of the inverter bridge (6) when the isolation relay (9) is closed (step 23); and generating the alternating voltage at the first connection point (11) by the inverter bridge (6) when the isolation relay (9) is open (step 24). A functional test of the isolation relay (9) is performed by comparing the magnitude of the test voltage between steps 23 and 24. The invention further relates to an inverter (2) designed to carry out the method.)