Development of Voltage Anomaly Protection Function for Low-Voltage Three-phase Intelligent Energy Meters
The existing three-phase intelligent electricity meter used by low-voltage three-phase electricity customers can monitor and record the voltage value of the power supply,but when the power supply voltage is abnormal,the switch protection cannot be realized.based on the above problems,a scheme for low voltage three-phase intelligent electricity meter is proposed.the scheme through the low voltage three-phase intelligent watt-hour meter monitoring power side phase real-time voltage,the monitoring results and the voltage threshold set,intelligent voltage meter abnormal voltage deviation alarm signal according to the abnormal degree and cost control switch switch signal,trigger alarm or cost control switch trip,so as to realize electricity customer low voltage three-phase system load side equipment protection.according to the actual electricity demand of electricity customers in daily life,the transient voltage abnormality of the low-voltage three-phase system can be ignored,so the abnormal voltage protection function only protects the excessive voltage deviation or even phase deficiency.at present,low-voltage three-phase electricity customers want to achieve voltage abnormal protection,customers need to install voltage abnormal protection devices.compared with the voltage abnormal protection device installed by the customer,this scheme has the advantages of saving the additional investment of power distribution equipment,saving extra space,reducing the additional wiring workload,and improving the automation level of smart electricity meter.the technology has more value and development potential in practical application.
low-voltage three-phase intelligent electricity metercost control switchvoltage abnormal protection
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