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发明公开
CN105896477A 一种模块化多电平换流器的接地保护方法及模块化多电平换流器 无效 - 驳回

一种模块化多电平换流器的接地保护方法及模块化多电平换流器
摘要：
本发明提供了一种模块化多电平换流器的接地保护方法及模块化多电平换流器，涉及直流输电技术领域，以在模块化多电平换流器出现接地故障时，对模块化多电平换流器进行保护。其中所述模块化多电平换流器的接地保护方法，在模块化多电平换流器中的至少一个相单元的每个子模块上对应的并联至少一个保护电路，保护电路的一端与子模块的正极连接，保护电路的另一端与子模块的负极连接；当模块化多电平换流器出现接地故障时，控制保护电路导通；当模块化多电平换流器处于正常状态时，控制保护电路断开。本发明提供的模块化多电平换流器的接地保护方法用于对模块化多电平换流器进行保护。
摘要（英）：

The invention provides a ground protection method of a modular multilevel converter and the modular multilevel converter, and relates to the technical field of direct current power transmission. The ground protection method is used for protecting the modular multilevel converter when a ground fault occurs in the modular multilevel converter. According to the ground protection method of the modular multilevel converter, at least one protection circuit is correspondingly connected in parallel to each submodule of at least one phase unit in the modular multilevel converter, one end of the protection circuit is connected with a positive electrode of the submodule, and the other end of the protection circuit is connected with the a negative electrode of the submodule; when the ground fault occurs in the modular multilevel converter, the protection circuit is controlled to be conducted; and when the modular multilevel converter is in a normal state, the protection circuit is controlled to be disconnected. The ground protection method of the modular multilevel converter, provided by the invention, is used for protecting the modular multilevel converter.

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