Verification device for photoelectric current transformer and method thereof

A technology of current transformers and calibration devices, which is applied to measuring devices, instruments, and measuring electrical variables, etc., can solve problems such as high safety risks, time-consuming, and labor-consuming, and achieve small safety risks, large application quantities, and convenient acquisition Effect

CN105068033AActive Publication Date: 2015-11-18STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-11-18

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Abstract

The invention discloses a verification device for a photoelectric current transformer and a method thereof. The verification device comprises a voltage source, a motion module and a signal acquisition module. The voltage source is used for generating the voltage signal of the signal which is output by the photoelectric current sensor of the photoelectric current transformer to be verified. The voltage signal is a voltage analog quantity. The voltage source is connected with the motion module, thereby forming a virtual measuring channel. The motion module converts the voltage analog quantity to an optical signal. The optical signal is used as a reference signal for verification and is transmitted to the photoelectric converter of the photoelectric current transformer to be verified through an optical fiber. The signal acquisition module is an electric power control system or an electric power protecting system which is connected with the photoelectric converter of the photoelectric current transformer to be verified. The verification device for the photoelectric current transformer and the method thereof have advantages of easy application, low cost and high calibration precision.
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Description

technical field

[0001] The invention belongs to the technical field of electrical engineering, and relates to a calibration device and method for a photoelectric current transformer. Background technique

[0002] With the popularization of (ultra) high-voltage direct current transmission technology, the application of photoelectric current transformers in power systems is also increasing. As the most important state quantity of (Ultra) HVDC transmission, the data measured by photoelectric current transformers directly participate in the calculation of HVDC control and protection functions, and have a great impact on the safe and stable operation of (Ultra) HVDC transmission. If the on-site verification of the DC control and protection system is carried out, it is impossible to avoid the virtual load verification of the measurement channel where the photoelectric current transformer is located. The transmission principle of the commonly used photoelectric current transformer...

Examples

Embodiment 1

[0034] Such as image 3 A calibration device for a photoelectric current transformer, comprising a voltage source, a telecontrol module (for converting a voltage analog quantity into an optical signal), a photoelectric converter, and a signal acquisition module;

[0035] The photoelectric converter is the photoelectric converter of the photoelectric current transformer to be verified;

[0036] The voltage source is used to generate a voltage signal that simulates the output signal of the photocurrent sensor of the photoelectric current transformer to be verified, and the voltage signal is a voltage analog quantity;

[0037] The voltage source is connected with the telecontrol module to form a virtual measurement channel;

[0038] The telecontrol module converts the voltage analog quantity into an optical signal, and the optical signal is transmitted to the photoelectric converter through an optical fiber as a reference signal for verification, and the photoelectric converter ...