低压电气设备末端过电压自动化抑制方法

Low-voltage Electrical Equipment Terminal Overvoltage Automation Suppression Method

当前的过电压自动化抑制结构多设定为单目标处理,抑制的范围有所局限,一定程度上容易导致过电压自动化抑制延长,为此提出对低压电气设备末端过电压自动化抑制方法的设计与验证分析。根据实际的自动化抑制需求及标准,先进行三相不平衡过电压辨识处理,融合柔性控制技术,构建多目标的抑制框架,打破传统抑制结构的局限,实现柔性自动化抑制结构的设计。以此为基础,构建三相有源过电压自动化抑制模型,采用无零矢量处理实现自动化抑制。最终的测试结果表明:与传统磁环过电压自动化抑制测试组、传统有源逆变分相注入过电压自动化抑制测试组进行对比,此次所设计的柔性处理电压自动化抑制测试组最终对于过电压自动化抑制的耗时相对较短,控制在了0.4s以下,说明该种自动化抑制模式相对更为灵活,应用简单,抑制速度和效率较高,具有实际的应用价值。

The current overvoltage automation inhibition structure is mostly set as single target processing,and the range of inhibition is limited,and to some extent,it is easy to lead to the extension of overvoltage automation inhibition.Therefore,the design and verification analysis of the overvoltage automation inhibition method at the end of low-voltage electrical equipment is proposed.According to the actual automatic suppression requirements and standards,the three-phase unbalanced overvoltage identification processing is carried out first,and the flexible control technology is integrated to construct a multi-target suppression framework,break the limitation of the traditional inhibition structure,and realize the design of flexible automatic inhibition structure.Based on this,a three-phase active overvoltage automatic suppression model was constructed without zero vector treatment.Final test results show that:with the traditional magnetic ring overvoltage automation suppression test group、the traditional active inverter phase injection overvoltage automation inhibition test group,the design of the flexible processing voltage automation inhibition test group eventually for overvoltage automation prefabricated time is relatively short,and controlled under 0.4s,shows that the automation suppression mode is relatively more flexible,simple application,inhibition speed and high efficiency,has the practical application value.