Integrated detecting and measuring method for metering property of high voltage power meter

Abstract

The invention relates to an overall verification and measurement method for the measurement performance of a high-voltage electric energy metering device, which belongs to the field of measurement. It connects the high-voltage voltage / current generation unit, voltage / current adjustment unit, data comparison unit, control and data processing unit with the high-voltage electric energy standard metering unit and the measured high-voltage electric energy metering device; the high-voltage electric energy standard metering unit and the measured The high-voltage electric energy metering device respectively applies the sequence values ​​of primary voltage Un and primary current In to obtain a set of standard circuit electric energy value and measured electric energy value data; the above data are respectively sent to the data comparison unit for comparison, and the comparison results are sent to the control and a data processing unit; the required measurement error percentage γ is obtained according to the following formula: γ (%)=((the electric energy of the measured high-voltage electric energy metering device-the electric energy of the standard metering circuit) / the electric energy of the standard metering circuit)×100 ; The control and data processing unit converts the measurement results into identifiable information and outputs them, based on which the overall measurement performance of the measured high-voltage electric energy metering device is verified and measured. It is suitable for the field of verification and measurement of high-voltage electric energy metering devices.

Description

technical field [0001] The invention belongs to the field of measurement, in particular to a method for verifying and measuring a high-voltage electric energy metering device. Background technique [0002] Electric energy, as an important energy source that is easy to use, high-quality and clean, is an important driving force for the development of the national economy, is related to the national economy and the people's livelihood, and is closely related to people's lives and industrial and agricultural production. [0003] With the development of the economy and the continuous improvement of people's living standards, the power generation, supply, and consumption continue to increase; the sale and purchase of electric energy and how to measure and calculate its value are becoming increasingly important. [0004] The current electric energy metering is mainly carried out based on the metering data measured by the electric energy metering device; do a good job in the meterin...

AI Technical Summary

Problems solved by technology

[0014] (1) The power cannot be read directly, and it needs to be multiplied by the current transformer and voltage transformer, which brings inconvenience to the management work;

[0015] (2) The system comprehensive error of the entire electric energy metering device is caused by various aspects such as current transformer, voltage transformer, electric energy meter, connecting wire resistance, contact resistance, etc., and there will be errors caused by human uncertain factors in the subsequent installation and combination process;

[0016] (3) Since all parties are considering the aspects that are beneficial to their own interests, when selecting current transformers, voltage transformers, electric energy meters, connecting wire resistances, and contact resistances, the units of production, supply, and use of electric energy will be biased towards It is conducive to one's own choice, the actual total uncertainty after combination is large, and the measurement value difference caused by the comprehensive error of the system in the actual operation process is quite large;

[0017] (4) The error value caused by wire resistance and contact resistance cannot be directly measured;

[0018] (5) Measuring / calculating the errors of each unit of the high-voltage electric energy metering device separately is not conducive to the optimal design between the units, and is not conducive to the technological progress of related industries, making the entire high-voltage electric energy metering device bulky, high in cost, and low in power consumption. High, serious energy waste, large material consumption, the key is that it is very difficult to improve the measurement accuracy, and the actual comprehensive error of the electric energy measurement device after installation cannot be directly determined;

[0019] (6) The connection wire resistance, contact resistance and voltage drop error caused by the mismatch between the output capacity and the secondary circuit wire of the current transformer, voltage transformer, and electric energy meter are not taken into account, and this part is exactly The focus of the interests of both suppliers and users is not only the source of excessive total uncertainty γ′, but also an unmeasurable and uncertain factor

[0023] Therefore, the existing verification and measurement methods for high-voltage electric energy metering devices cannot accurately and comprehensively reflect the accurate system comprehensive error of the electric energy metering device.

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