A phasor measurement device laboratory calibrator and a phasor measurement method thereof

Abstract

The invention provides a phasor measurement device laboratory calibrator and a phasor measurement method thereof which belongs to the technical field of phasor measurement and phasor measurement device test. The system includes a GPS synchronous time service module, a signal collection module and a controller module; the measurement method includes: model selection is performed on a hardware, influence of hardware error to phasor measurement is disclosed by utilizing an error transmission theory; measurement is performed by utilizing an improved energy center of gravity method and an improvedDFT algorithm during stable state test, a non-linear fitting model is constructed during dynamic test, solving is performed by utilizing a Gauss-Newton method, polynomial fitting is adopted for solving a frequency change rate of static and dynamic test signals. The calibrator can work reliably, and can limit influence on phasor measurement precision by a collection system within a small range andprovide a high precision reference value for error analysis. The measurement method makes the phasor measurement accuracy more than four times higher than an error standard, and has a good inhibitioneffect on harmonic wave and inter-harmonics interference.

Description

technical field [0001] The invention belongs to the technical field of synchronous phasor measurement and synchronous measurement device testing, and in particular relates to a synchronous measurement device laboratory calibrator and a synchronous phasor measurement method thereof. Background technique [0002] Synchronous measurement devices such as synchrophasor measurement unit (PMU) are effective tools for monitoring dynamic changes in power systems, and their measurement data play an increasingly important role in model verification, state estimation and oscillation monitoring. In order to ensure that the above applications can work effectively and reliably, it is necessary to test the accuracy of synchronous measurement devices such as PMUs to determine their measurement accuracy under static and dynamic conditions of the power system. At present, there are two types of synchronous measurement device test systems at home and abroad, one of which is a synchronous measur...

AI Technical Summary

Problems solved by technology

In order to improve the measurement accuracy of the calibrator, research can be carried out from the aspects of hardware and software; in terms of hardware, boards with higher precision can be selected to reduce errors; in terms of software, the real-time performance of the current synchrophasor measurement algorithm High and low algorithm complexity, resulting in low measurement accuracy, can not be directly applied to the synchronous measurement device calibrator, therefore, it is necessary to design a high-precision phasor measurement algorithm according to the characteristics of the synchronous measurement device laboratory test

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