Abnormal power usage monitoring method based on local power reference

Abstract

The invention relates to an abnormal power usage monitoring method based on local power reference. The abnormal power usage monitoring method comprises the following steps of: carrying out real-time measuring on a circuit voltage and a current signal of a three-phase three-wire system circuit, thus obtaining an actual power of the circuit and effective values and phase positions of a phase voltage and a phase current of each phase; by taking average values of the effective values of the phase voltages and the phase currents of three phases and the average values of included angles between the phase voltages and the phase currents of three phases as amplitudes of reference voltages and reference currents and included angles between the reference voltages and the reference currents, calculating a reference power, judging whether a balanced load of a user exists according to deviations between the included angles between the included angles between the phase voltages and the phase currents of the three phases and the included angles between the reference voltages and the reference currents; estimating abnormal electricity consumption of the user by utilizing the reference power and the actual power; and finally transmitting monitoring information to a background server by a GPS (Global Positioning System). According to the abnormal power usage monitoring method based on the local power reference, not only the existence or the inexistence of the balanced load of the user can be accurately judged, but also the electric quantity loss data caused by the abnormal power usage can be provided, and the basis for administering and punishing due to balanced power usage is provided.

Description

technical field [0001] The invention relates to a method for monitoring abnormal power consumption that can provide data on power loss caused by abnormal power consumption, and belongs to the technical field of monitoring. Background technique [0002] At present, my country's 10kV line adopts the neutral point ungrounded method. The high-voltage side of the user transformer is connected in a three-phase three-wire system, and the low-voltage side is connected in a three-phase four-wire system. The energy meter is installed on the high-voltage side. When the three-phase load is unbalanced In case of abnormal electricity consumption, large errors will appear in the measurement results of the energy meter, which will affect the fairness of billing. [0003] There are usually two reasons for the unbalanced three-phase load. One reason is that the power consumption situation has changed, and the optimal distribution of load needs to be guided by monitoring the abnormal power cons...

AI Technical Summary

Problems solved by technology

However, due to the current 10kV metering and monitoring equipment in my country cannot provide data on power loss caused by abnormal power consumption, it has caused difficulties in the management and punishment of unbalanced power consumption.

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