Discussion on construction of test capabilities for safety approval of underground high-voltage power supply and consumption equipments

Present status of high-voltage power supply and consumption equipments used in coal mine underground were introduced，including their technical characteristics and safety status and test capabilities of their safety approval. The main problems exited in development of test ability of the safety approval were also analyzed. Combining with the project of security approval analysis and verification laboratory for coal mine high-voltage power supply and consumption system, the construction contents were discussed from high capacity testing power supply, switching apparatus, frequency conversion electric drive system, reactive power compensation and power grid parameter simulation.