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Method and device for checking power-factor angle of high voltage line of intelligent substation on site

A technology of power factor angle and smart substation, which is applied in the direction of electrical devices, measuring electric power, and the phase angle between voltage and current, etc. It can solve the problem of low insulation voltage, inability to simulate the working environment, and the lack of simultaneous measurement of power factor of current transformers Angle and other issues to achieve the effect of ensuring accuracy

Active Publication Date: 2012-01-04
STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the insulation voltage of the standard current transformer and the current booster to the ground is low, and it cannot simulate the actual working environment of the transformer installed on site, that is, it does not have the conditions of high voltage and high current at the same time, and it is impossible to realize the primary line. Measurement of voltage and current power factor angle
Moreover, the phase angle between the primary high voltage and the large current output by the traditional step-up and step-up device is also difficult to adjust from 0 to 360°; Function of power factor angle between current transformers

Method used

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  • Method and device for checking power-factor angle of high voltage line of intelligent substation on site
  • Method and device for checking power-factor angle of high voltage line of intelligent substation on site
  • Method and device for checking power-factor angle of high voltage line of intelligent substation on site

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Embodiment Construction

[0020] as attached figure 1 As shown, the on-site verification device for the power factor angle of the high-voltage line in the smart substation includes a current booster, a standard current transformer, a high-voltage test power supply, a standard voltage transformer, a phase shifter, an electronic transformer comprehensive calibrator, and a voltage booster and step-up regulators, step-up regulators. The power supply of the device adopts AC 380V / 100A, three-phase four-wire system. The large current generated by the current booster is passed through the standard current transformer by the 220kV high-voltage cable, and then connected to the primary two ends of the ECT, that is, the electronic current transformer. This method has the characteristics of large current and high insulation voltage. The high voltage generated by the high voltage test power supply (1.2*220 / kV and below) are connected in parallel to the standard voltage transformer, and then connected to EVT, t...

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Abstract

The invention discloses a method and a device for checking a power-factor angle of a high voltage line of an intelligent substation on site. Phase adjustable high voltage and large current experimental conditions are generated through a voltage regulator, a large current generator, a high voltage experimental power supply and a phase shifter, large current generated by the large current generatoris connected to a standard current transformer and an electronic current transformer, high voltage generated by the high voltage experimental power supply is connected to a standard voltage transformer and an electronic voltage transformer, a digital signal processed by the electronic transformers and a combination unit and an analog signal of the standard voltage and current transformers are simultaneously connected to an electronic transformer comprehensive checking instrument, and the electronic transformer comprehensive checking instrument compares an error of two power-factor angles. By the invention, the influence of electronic transformers, the combination unit, a data transmission network and the like on errors of the power-factor angles can be obtained, so that related parametersare regulated to ensure the power-factor angle measuring and electric energy metering accuracy.

Description

technical field [0001] The invention belongs to the field of electric energy measurement, and particularly relates to an on-site calibration method and device for measuring high-voltage line power factor angle errors based on electronic transformers and merging units in an intelligent substation, which can perform on-site calibration on the error of the high-voltage line power factor angle of the substation test. Background technique [0002] At present, my country has incorporated smart grid into the implementation plan in the field of power transmission and distribution engineering technology, and smart substations using the latest cutting-edge technology have begun pilot construction and operation. The accuracy and reliability of power parameter measurement and electric energy metering is an important guarantee for the successful application of this new technology. Electronic transformers in smart substations are used as voltage and current transformers for measurement, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R25/00G01R21/00G01R35/02
Inventor 陆佳政万全欧朝龙徐先勇向华陈福胜杨茂涛杨帅
Owner STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST
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