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E-mail
lhdqsw@126.com
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Address
Building 7, International Enterprise Center, No. 188 Environmental Protection Middle Road, Yuhua District, Changsha City, Hunan Province
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Changsha Lanhong Electric Technology Co., Ltd
Integrated online monitoring system for partial discharge of transformers (reactors)
NegotiableUpdate on 12/10
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Overview
Product Introduction: The online monitoring system for partial discharge of transformers (reactors) integrates vibration sensors, HFCT (high-frequency partial discharge sensors), AE (ultrasonic sensors), UHF (ultra-high frequency partial discharge sensors), and RF partial discharge sensors
Product Details
Product Introduction
The online monitoring system for partial discharge of transformers (reactors) integrates vibration sensors, HFCT (high-frequency partial discharge sensors), AE (ultrasonic sensors), UHF (ultra-high frequency partial discharge sensors), and RF partial discharge sensors. This system can provide user guidance and analysis conclusions by comprehensively analyzing various dynamic and static data, using fault assessment models and experience databases. The comprehensive monitoring system for transformers (reactors) can provide interfaces for data exchange with devices such as iron core and clamp grounding current monitoring system, winding fiber optic temperature measurement system, and transformer neutral point grounding monitoring.
Features
◎ It has the function of automatically, continuously or periodically collecting status monitoring information of ultrasonic partial discharge, high-frequency partial discharge and other equipment, and transmitting standardized data analysis results and warning information to the comprehensive monitoring background, and receiving and transmitting control commands;
◎ Equipped with timing functions for each sensing unit;
◎ It has real-time display function of characteristic parameters such as partial discharge amplitude and partial discharge frequency per unit time, supports single parameter trend analysis, threshold and trend alarm, historical data query, report generation and other functions, and supports remote control functions such as threshold setting, data summoning, parameter setting, etc;
◎ It has configurable characteristic parameters such as partial discharge amplitude, number of partial discharges per unit time, and multi parameter synchronous real-time display function. It supports multi parameter trend analysis, evaluation and diagnosis, and can achieve customized warning function;
◎ It has the function of automatically shortening the sampling period and data upload period for other monitoring parameters after a single monitoring parameter alarm;
◎ It has a system self-test function and should have an active alarm function when the device malfunctions abnormally.
Technical parameters of partial discharge monitoring host
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System functions |
technical indicators |
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Collecting host |
i7，3.4GHz，8MCache,14nm，65Wpower consumption |
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High frequency and RF channel acquisition |
support5Channel synchronization,100MS/sSampling rate; resolution14bit; Input range: ±2V；DCCoupling, 50Ω input impedance |
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Ultrasonic channel acquisition |
support12Channel synchronous acquisition,50kS/s，16-Bit |
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Vibration channel acquisition |
support6Channel vibration signal acquisition,100kS/s MaxSampling rate; resolution12 bit±10V |
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sensor |
number of channels |
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Ultrasonic sensor |
12 |
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vibration sensor |
6 |
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Ultra high frequency partial discharge sensor |
3 |
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High frequency partial discharge sensor |
4 |
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runtime environment |
technical indicators |
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network connection |
electricity4GWireless Private Network |
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Protection level |
IP55 |
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system power supply |
AC220V/50Hz |
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power consumption |
300W(Air conditioning off),900W(Air conditioning on) |
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Operating Temperature |
-15℃~+55℃ |
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Operating Humidity |
5%~95%RH |
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Cabinet material |
Box cold-rolled sheet spray treatment/mounting plate2.5mmgalvanized sheet |
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cabinet dimensions |
600*600*1200mm |
Technical specifications of partial discharge sensing unit
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image |
model |
Main technical parameters |
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UHF sensing unit |
LHJFTGP |
◎Amplitude frequency characteristics: The bandwidth covers 200MHz~1.5GHz, and the average effective height within this frequency band should be ≥ 11mm, with a minimum effective height of ≥ 3mm; ◎Detection sensitivity: ≤ 7V/m (17dBV/m); ◎Dynamic range of obstruction: 40dB; ◎Time deviation of different detection channels: ≤ 2us; ◎Input impedance: 50Ω ； ◎NType wood interface output. |
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HFCT sensing unit |
LHJFGP |
◎3MHz~30MHz average transmission impedance: 10mV/mA; ◎3MHz~30MHz frequency range sensor bandwidth: 10MHz; ◎Minimum measurable local discharge capacity: 50pC; ◎When the dynamic range of partial discharge signal is 40dB, the detection linearity error is ± 15%; ◎The detection frequency can be adjusted within the frequency range of 3MHz to 30MHz, and the ability to suppress narrowband interference signals is: 20dB ； ◎Sampling rate: 100MS/s; ◎Time deviation of different detection channels: 2us. ◎MRLS-150/54 aperture: 54mm; ◎Frequency: up to 150MHz; ◎Installation method: Open type. |
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AE sensing unit |
LHJFCSB |
◎Resonant frequency: 140 ± 20% RH; ◎Peak sensitivity of sensor: 60dB (V/(m/s)), mean sensitivity: 40dB (V/(m/s)); ◎Detection sensitivity: 40dB; ◎Sensor detection frequency range: 80~200kHz; ◎Dynamic range: 40dB; ◎Linear error degree: ± 20%; ◎Amplitude deviation of different detection channels: ± 10%, time deviation: ± 5Ms； ◎After one hour of continuous operation of the sensing unit, the relative standard deviation of six measurement results should be ≤ ± 5%; ◎Input impedance: 50 Ω. |
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RF sensing unit |
LHJFSP |
◎Detection frequency band range: 100MHz to 1000MHz; ◎Average effective height: ≥ 10mm； ◎Sampling rate: 100MS/s. |
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Vibration sensing unit |
Lhjfzd |
◎Measurement range (peak to peak): 0.1Mm～400MmError ≤ 10%； ◎Vibration acceleration measurement range: -10g to+10g, error ≤ 10%; ◎Frequency response: 5Hz~3000Hz, the relative error of frequency response should be ± 5%; ◎Sensor sensitivity: 100mV/g. |
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