Substation measurement data abnormal alarm method

Abstract

Provided is a transformer station measured data abnormity warning method which summarizes and concludes a criterion capable of determining the abnormity of measured data according to various data characteristics at the time when measured data abnormity appears in a user transformer station, and which gives a corresponding alarm and a trip-out instruction in a preset specific case when the criterion is satisfied. The method may monitor the data of all measuring points in the transformer station in a unified way. When equipment or man-made data abnormity appears at a certain measuring point, an alarm can be given immediately to warn operators in the transformer station, a data abnormity reason can be automatically acquired and information is transmitted to a power company main station at a distant place. The method may automatically turn off a breaker in a faulted line within five minutes after the data abnormity appears in order to prevent long-time measured data abnormity and contribute to electric energy compensation in the future. The method effectively prevents great consequent loss of electric charge of a power company, timely gives the alarm and activates trip-out, and contributes to abnormality positioning in advance for the power company.

Description

Technical field [0001] The invention relates to an alarm method for abnormal measurement data of a substation of a power system. Background technique [0002] The measurement data of the substation reflects the total power consumption of the substation and the power consumption on the load side of the power lines in the station. It is an important basis for the electricity billing in the station, and the measurement data must be accurate and reliable. [0003] In the previous substation, the metering device was used to collect the voltage of each level of voltage transformer and the phasor of the current of each power line, and the power of each power line was calculated by the electricity collection device as the main basis for billing. [0004] The existing measurement device does not have a complete alarm function. When there is a lack of phase of the collected voltage, the reverse sequence of the collected voltage and the collected current, the two opposite phases of the collecte...

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Problems solved by technology

[0004] The existing metering device does not have a perfect alarm function. When there is a phase loss of the collected voltage, a reverse sequence between the collected voltage and the collected current, two of the collected currents are in opposite phases, or a certain two of the collected voltages are in opposite phases, the metering data will be greatly abnormal. If the above situation is caused by human or equipment reasons after the substation is put into operation, it cannot be discovered in time, which will cause the loss of metering data, the serious consequences of electricity billing being less than the actual electricity consumption, and causing great losses to the power supply company

In such cases, the current meters and electricity collection devices have no alarm function

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