基于電磁影響的10 kV/0.4 kV室內(nèi)變電所電流特性分析

Analysis of Current Characteristics of 10 kV/0.4 kV Indoor Substation Based on Electromagnetic Influence

摘要: 為定量分析變電所電氣系統(tǒng)對弱電系統(tǒng)的電磁影響，必須首先確定電氣系統(tǒng)正常運行及短路故障電流值。因此通過建立PSCAD仿真模型，模擬10 kV/0.4 kV變壓器、電纜及開關設備在正常運行和接地故障下的電流特性，重點分析和計算了中性點不接地系統(tǒng)兩相不同點接地故障電流值。

Abstract: To quantitatively analyze the electromagnetic influence of the substation electrical system on the weak electrical system, it is necessary to first determine the normal operating and short-circuit fault current values of the electrical system. Therefore, by establishing a PSCAD simulation model, the current characteristics of 10 kV/0.4 kV transformers, cables, and switchgear under normal operation and grounding fault conditions are simulated, with a focus on analyzing and calculating the two-phase different-point grounding fault current values in the neutral-point ungrounded system.