利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN106602528A 基于两侧零序功率方向的输电线路断线区域判别方法 无效 - 撤回

基于两侧零序功率方向的输电线路断线区域判别方法
摘要：
本发明公开一种基于两侧零序功率方向的输电线路断线区域判别方法，包括如下步骤：步骤1，采集输电线路本侧和对侧的三相电流和三相电压；步骤2，计算输电线路两侧的零序功率，判断零序功率方向；步骤3，若输电线路两侧的零序功率方向均为正方向，则判定断线发生在该输电线路。此种方法可有助于在大电流接地系统中，继电保护有选择性地切除断线故障。
摘要（英）：

The invention discloses a transmission line breaking area judgment method based on a two-side zero-sequence power direction. The method comprises the following steps: 1, three-phase current and three-phase voltage at the side and the opposite side of the transmission line are acquired; 2, zero-sequence power at two sides of the transmission line is calculated, and a zero-sequence power direction is judged; and 3, if the zero-sequence power directions at two sides of the transmission line are both forward directions, breaking is judged to happen to the transmission line. According to the method of the invention, in a large-current grounding system, the breaking fault can be selectively cut off through relay protection.

0/0