Island grid identification of voltage source inverter and inverter

There is described a method of islanding grid identification by a voltage source inverter (14), comprising the steps of: determining the frequency and phase of a voltage curve of a sub-grid (10) connected at a grid connection point of the inverter (14); generating a voltage curve having the determin...

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Bibliographic Details
Main Author WINTER BJORN OLIVER
Format Patent
LanguageChinese
English
Published 23.08.2024
Subjects
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
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Summary:There is described a method of islanding grid identification by a voltage source inverter (14), comprising the steps of: determining the frequency and phase of a voltage curve of a sub-grid (10) connected at a grid connection point of the inverter (14); generating a voltage curve having the determined frequency by means of a bridge circuit of the inverter (14), wherein the phase of the generated voltage curve has a first change over time with respect to the determined phase; determining a correlation between the first temporal change and a second temporal change of power exchanged with the sub-grid (10) by the inverter (14); and if the determined correlation is lower than a predetermined correlation degree, identifying the isolated island power grid. A corresponding voltage source inverter (14) is also described. 描述了一种通过电压源逆变器(14)进行孤岛电网识别的方法，包括以下步骤：确定连接在逆变器(14)的电网连接点处的子电网(10)的电压曲线的频率和相位；通过逆变器(14)的桥式电路生成具有所确定的频率的电压曲线，其中所生成的电压曲线的相位相对于确定的相位具有第一时间变化；确定第一时间变化和通过逆变器(14)与子电网(10)交换的功率的第二时间变化之间的相关性；以及如果所确定的相关性低于预定的相关程
Bibliography:Application Number: CN20238015023