ANALYSIS ON VOLTAGE SAG IN REFINERY AND CHEMICAL ENTERPRISE AND TREATMENT MEASURES
Almost all the plants in refinery and chemical enterprises are continuous production.They have higher requirement on the reliability of power supply.However electric facility failures,the voltage fluctuation from the outside net,and the maloperation etc.may lead to voltage sag,which impacts on the safe and stable operation of the plant.To avoid the voltage sag,we applied the power source quick shift device and UPS on the power supply side to relieve the voltage fluctuation.On the user side,some voltage sensitive devices,such as electric motor and transducer took the restart and DC support mode to reduce the influence of voltage sag.
refinery and chemical enterpriseelectricsvoltage sagvoltage fluctuationstart-up
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