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Integrator of Rogowski coil

Zhu Cha

Open publisher page 1 citations

Abstract

Aiming at the insufficiency of conventional digital integrator in low-frequency interference rejection,the principles of analog and digital integrators used in electronic current transducer are analyzed and an integrating algorithm based on the low-frequency gain-flattening analog integrator is proposed for the digital integrator,which gets rid of the influence of zero drift to effectively lower the DC error and sets the initial value of integrator to greatly increase the measurement accuracy. It is modeled and studied according to the transient characteristics of power system,and the test results show its measuring accuracy meets the national criterion of 0.2 level,proving its validity and practicability.

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What this paper is about

Aiming at the insufficiency of conventional digital integrator in low-frequency interference rejection,the principles of analog and digital integrators used in electronic current transducer are analyzed and an integrating algorithm based on the low-frequency gain-flattening analog integrator is proposed for the digital integrator,which gets rid of the influence of zero drift to effectively lower the DC error and sets the initial value of integrator to greatly increase the measurement accuracy. It is modeled and studied according to the transient characteristics of power system,and the test results show its measuring accuracy meets the national criterion of 0.2 level,proving its validity and practicability.

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Available abstract

Aiming at the insufficiency of conventional digital integrator in low-frequency interference rejection,the principles of analog and digital integrators used in electronic current transducer are analyzed and an integrating algorithm based on the low-frequency gain-flattening analog integrator is proposed for the digital integrator,which gets rid of the influence of zero drift to effectively lower the DC error and sets the initial value of integrator to greatly increase the measurement accuracy. It is modeled and studied according to the transient characteristics of power system,and the test results show its measuring accuracy meets the national criterion of 0.2 level,proving its validity and practicability.

Key concepts: Integrator, Rogowski coil, Integrating ADC, Op amp integrator, Control theory (sociology), Electronic engineering, Passive integrator circuit, Transducer

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