Fiber access type electric energy meter with function of harmonic detection

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 high precision and avoid receiving effects.

Active Publication Date: 2016-03-30
HEXING ELECTRICAL
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, accurate detection of harmonics is a basic requirement for the safe and stable operation of

Method used

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  • Fiber access type electric energy meter with function of harmonic detection
  • Fiber access type electric energy meter with function of harmonic detection
  • Fiber access type electric energy meter with function of harmonic detection

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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 a fiber access type electric energy meter with a function of harmonic detection, so as to accord with the communication standard of an intelligent transformer station. The energy meter mainly comprises (1) a data collection part: a fiber receiving and transmitting module receives a data message, sent by a communication unit, according with the standard, and transmits the data message to an Ethernet PHY controller, and the Ethernet PHY controller carries out frame verification of the received data, removes the frame head and tail and transmits the data to a DSP; (2), a data processing part: the DSP carries out the analysis of the data frame after the DSP receives a data package, obtains sampling data in the data frame, completes the calculation of voltage, current, harmonic waves at all orders and power through employing an FFT algorithm, transmits the sampling data to an MCU, and controls the power pulse output; (3), a data management part: the MCU completes the calculation and management of active electric energy, reactive electric energy and electricity demand; (4), a data communication part: a display module is used for display all data items, and an infrared or 485 communication interface is used for communication transmission and completes the monitoring of operation 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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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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