Dynamic phasor measurement system of phasor measurement unit (PMU), and measurement method thereof

A measurement system and dynamic phasor technology, which can be used in measurement devices, measurement of electrical variables, phase angle between voltage and current, etc., and can solve problems such as immature dynamic phasor measurement methods.

Active Publication Date: 2015-12-23
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the dynamic phasor measurement method is still immature, and how to measure the dynamic phasor accurately and in real time still needs further research

Method used

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  • Dynamic phasor measurement system of phasor measurement unit (PMU), and measurement method thereof
  • Dynamic phasor measurement system of phasor measurement unit (PMU), and measurement method thereof
  • Dynamic phasor measurement system of phasor measurement unit (PMU), and measurement method thereof

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Embodiment Construction

[0023] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] A dynamic phasor measurement system of a synchronized phasor measurement device, comprising a current and voltage input module 1 , a satellite receiver 2 , a calculation module 3 , a communication module 4 and a memory module 5 . The current and voltage input module 1 includes a filter and an analog-to-digital conversion. After the input analog current and voltage are filtered out by the filter for high-frequency interference, the analog-to-digital conversion part converts the analog into a digital value, and the conversion result Enter Compute Module 3. The satellite receiver 2 obtains satellite timing, and the time can be changed from GPS satellites or Beidou satellites. The time signal output by the satellite receiver is input into the calculation module 3, in which the dynamic phasor is measured by the three-quarter fun...

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Abstract

The invention provides a dynamic phasor measurement system of a phasor measurement unit (PMU), and a measurement method thereof. The system comprises a current and voltage input module, a satellite receiver, a calculation module, a communication module and a memory module. The calculation module is connected with the satellite receiver, the communication module, the memory module and the current and voltage input module. According to the invention, dynamic phasors are measured by use of a three-quarter fundamental wave period dynamic phasor measurement algorithm so that the conflict between computational complexity and real-time performance in dynamic phasor measurement is solved, the dynamic phasors are rapidly and accurately measured, the measurement performance of the PMU can be improved, and assistance is provided for large-power-network analysis and control.

Description

technical field [0001] The invention relates to a dynamic phasor measurement method, in particular to a dynamic phasor measurement method of a synchronized phasor measurement device. Background technique [0002] The application of synchrophasor measurement unit (PhasorMeasurementUnit, PMU) makes the real-time monitoring of large-scale interconnected power grid possible, and brings great convenience to the monitoring and analysis of large-scale interconnected power grid. The dynamic performance of the PMU is very important, but in practice the amplitude, frequency and phase angle of the grid voltage are difficult to keep constant, so the PMU always needs to measure dynamic information. When faults such as low-frequency oscillation and frequency offset occur in the power grid, if the estimation of current and voltage is inaccurate, it may cause a wrong estimation of the power flow of the power grid, which will lead to wrong judgments on the state of the power grid and wrong a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R25/00
Inventor 卢达林繁涛赵莎白静芬李华陈松方宋晓卉曾彦超白璋
Owner CHINA ELECTRIC POWER RES INST
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