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An optical fiber connected electric energy meter with harmonic detection function

A technology for optical fiber access and harmonic detection, which is used in the measurement of electrical variables, measurement devices, measurement time integration, etc., to achieve the effect of avoiding reception and high precision

Active Publication Date: 2018-08-21
HEXING ELECTRICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, accurate detection of harmonics is a basic requirement for the safe and stable operation of substation power equipment, while conventional digital energy meters do not have this detection function

Method used

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  • An optical fiber connected electric energy meter with harmonic detection function
  • An optical fiber connected electric energy meter with harmonic detection function
  • An optical fiber connected electric energy meter with harmonic detection function

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Embodiment Construction

[0037] The technical solutions of the present invention will be clearly and completely described below through specific embodiments in conjunction with the accompanying drawings.

[0038] An optical fiber access electric energy meter with a harmonic detection function of the present invention adopts a combined structure of DSP and MCU, and combines the data processing capability of the DSP with the communication management capability of the MCU.

[0039] Such as figure 1 As shown, the electric energy meter of the present invention includes an optical fiber transceiver module, an Ethernet PHY controller, a DSP, an MCU and peripheral circuits. The peripheral circuit includes a power supply unit, a real-time clock connected with the MCU, an infrared communication interface, a display module, a key module, a dual 485 communication interface, and a storage module.

[0040] The optical fiber transceiver module receives the data message conforming to the IEC61850-9-1 / IEC61850-9-2 st...

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Abstract

The invention discloses an optical fiber access electric energy meter with a harmonic detection function to meet the communication standard of an intelligent substation. It mainly includes: (1) Data acquisition part, the optical fiber transceiver module receives the standard data message sent by the merging unit, and forwards it to the Ethernet PHY controller; the Ethernet PHY controller performs frame verification on the received data and removes The frame header and frame tail are sent to DSP; (2) data processing part, after DSP receives the data packet, it analyzes the data frame, extracts the sampling data, and uses FFT algorithm to complete the voltage, current, harmonics and power Value calculation, and upload to MCU through the serial port, and control the power pulse output at the same time; (3) data management part, MCU completes the calculation and management of power parameters such as active energy, reactive energy, demand; (4) data communication part, Display various data through the display module, and carry out communication transmission through infrared or 485 communication interface to complete the monitoring of operating parameters.

Description

technical field [0001] The invention relates to the field of intelligent substations, in particular to an optical fiber access electric energy meter with a harmonic detection function. Background technique [0002] The entire architecture of the intelligent substation is based on the IEC61850 standard for layering, modeling and communication. Revolutionary changes have taken place in the way of analog quantity acquisition. The analog quantity output by the traditional primary equipment is digitized on the spot, and the communication with the secondary equipment is carried out through the network to realize information sharing, and the existing cables are replaced by optical fibers. Due to the non-linearity and impact of the load nature, and the influence of factors such as faults in the interconnected lines in the power grid and deterioration of power quality, there are harmonics exceeding the standard. The existence of power harmonics may cause parallel or series resonance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R22/10G08C23/06G01R23/16G01R11/54
CPCG01R11/54G01R22/10G01R23/16G08C23/06
Inventor 周良璋刘美飞范有徐全伟张敏陈宏
Owner HEXING ELECTRICAL
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