Successful primary power supply connection at Substation 190a/b of the Guangxi Huayi Energy Chemical Project

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Recently, the 190a and 190b substations, which are part of the 2×200,000 tons/year EVA production units for the methanol-to-olefins and downstream processing integrated project at Guangxi Hua Yi Energy Chemical Co., Ltd., constructed by Global Sixth Construction Company, successfully passed the strict inspections carried out by the project owner. Power was supplied to these units on the first attempt, marking the full operational readiness of the plant’s power system. The entire power reception process is carried out strictly in accordance with standardized and regulated procedures. First, five full-voltage impulse tests were conducted on the 35/10 kV main transformer, with a 10-minute interval between each test. The sound, vibration, and temperature changes of the transformer were closely monitored to ensure stable operation of the equipment at its rated voltage. Subsequently, three impulse power-on tests were conducted on the 10kV bus system to verify the phase of the voltage transformers, charging tests and phase verification operations were carried out on the bus coupler, and functional tests were performed on the disturbance-free quick switching device to confirm the reliability of automatic switching of the bus coupler in the event of line voltage loss or protection activation.