Study on Distribution Characteristics of Leakage Current in DC Field of Converter Station

The corrosion condition of the grounding grid of the converter station is very important to ensure the safety and stability of the power system. From the perspective of the leakage current of the converter station equipment, the circuit model of the leakage current in the DC field of the converter station is proposed; According to the leakage current characteristics, the DC field of the converter station is divided into the high-voltage side and the neutral-pole side area; According to the actual situation of the converter station, a measurement and analysis platform suitable for the leakage current of the converter station equipment is built; Through field test, the leakage current of each area equipment is measured and analyzed, and the distribution characteristics of equipment leakage current in different areas are summarized; According to the measurement data, the areas and equipment types that should be focused on corrosion problems are proposed.