Preface Huayuan Company was established in 1992. After unremitting efforts, it has become one of the main suppliers of power operation power supply in China. Huayuan Company is a high-tech enterprise in Zhejiang Province. It has passed ISO9001:2000 certification, as well as the network access certification and selection of the State Power Corporation, the Ministry of Railways, the Ministry of Posts and Telecommunications and other systems. It is the enterprise responsible for the National Torch Plan, the National New Product Plan and the Ministry of Science and Technology Innovation Fund Project. The power operation power supply is a DC power supply equipment for thermal power plants, nuclear power plants, hydropower plants and various substations such as 500KV, 220KV, 110KV, 35KV, etc., including the supply of circuit breaker opening and closing and secondary circuit instruments, relay protection, control, emergency lighting and other low-voltage equipment. It can also be used in all occasions that require DC 110V or 220V system power supply, such as electrified railways, petrochemicals, metallurgy, mining, etc. Huayuan Company pioneered a new model of power supply in China: using PWM power electronics technology to develop high-frequency switching power supply modules; using computer control technology to create intelligent power supply functions and four remote functions suitable for unattended power stations; introducing VRLA valve-controlled lead-acid batteries, transforming the huge dedicated battery room into a battery screen and moving it into the main control room. The products of this project passed the provincial appraisal in 1993 and were rated as national new products in 1994.
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