HS9000 transformer partial discharge monitoring system

HS9000 transformer partial discharge monitoring system for partial discharge is a measure of an important symbol of high-voltage electrical equipment insulation condition. Severe localized extent of the amount discharged most effectively reflect the internal transformer insulation condition. Therefore, the system reliability monitoring for large power transformers, partial discharge phenomenon in its internal real-time online monitoring is very effective. Partial discharge monitoring four categories: chemical, acoustic, pulse current method and high overclocking method. UHF method has strong anti-interference ability, high monitoring sensitivity. It is the main method of partial discharge on-line monitoring technology. Applicable Newly built and has been running above 110KV transformer I. Introduction HS9000 transformer partial discharge monitoring system is the use of ultra-high frequency method (UHF) were transformer partial discharge signals in real-time sampling, data processing. And background processing systems for data upload remote diagnostic analysis, is our own products, with the patented technology. System Components: UHF sensor (1-4 only), a data processing unit (local IED), high-frequency cables and professional analysis software. System features a unique multiple anti-interference function. The hardware design channel noise filter, noise collecting channels, etc. circuit configuration. Site to filter noise, clean signal acquisition; for specific baud noise signal increases the band-stop filter. PD action by software level, standard density and other parameters, automatic separation of voice, automatically separating voice signal interference, greatly improving the reliability of test results. Second, the UHF sensor UHF sensor is mainly used to capture high-frequency signal generated when an internal transformer partial discharge. Sensors are passive use of polymer insulation material sealed, temperature up to 180 ℃, will not react chemically with the transformer oil does not affect the electrical performance of the transformer. The shell is made of stainless steel, can be sprayed consistent color and transformers according to user requirements. Technical parameters: 1) the frequency range 500 ~ 1500MHz 2) sensor sensitivity 50PC 3) impedance 50 [Ω] 4) installation of built-in type 5) output connector N type III background noise sensor for acquiring outside interference signal (for example: radar signal, motor, aviation, arcing high frequency signals, etc.). Used and collected by the sensor inside the transformer relatively high frequency signal is determined to increase the system reliability of partial discharge signal identification. Technical parameters: 1 Frequency range 300-3000MHz 2 sensor sensitivity 50PC 3 impedance matching 50 [Ω] 4 Installation on the transformer installed near external 5 Output Connector N-type four UHF sensors on the new transformer is recommended to increase the transformer body detection holes or mounted transformer on UHF hand empty sensor; can be further improved PD detection sensitivity, while making it possible fault location (requires manufacturers to cooperate in detecting hole to open the transformer body position, the UHF sensor installed at the transformer factory) UHF sensor is a passive circuit and the transformer work on any electrical links, regardless of the test apparatus and the operator are more secure. Recommendations have been put in operation transformer transformer oil port UHF sensor installation height of UHF sensor mounted in the transformer oil drain valve port, valve port installation of "work" type head, UHF sensor height is 60mm, no more than "workers" type head height and length, height and will not affect the performance of the transformer, the installation does not require regular maintenance and frequent calibration. The installation process does not need to play an open valve, no oil leak. Fifth, the system technical indicators: 1, UHF sensor control band: 300-2000MHZ 2, a minimum detectable amount of discharge: 50pc 3, the system gain: 65dB 4, dynamic range: -65dB-0dB 5, sensitivity:> 10mv 6, measuring range : 50pc-10000pc 7, System Scope: 110kv voltage levels of all of the above transformer 8, the scene working temperature: -40 ℃ -75 ℃ 9, on-site temperature and humidity: 0% -95% 10. Power: AC220V / 5 six processing software interface station system introduced system-friendly, easy to operate, has a powerful data analysis, historical trend analysis and rich display. System software uses Internet access technology background with web server, all work browse UHF electromagnetic pulse detection signal Internal 1. Continuous real-time monitoring of transformer PD generated page, judge PD exists. 2. Save important PD (PD) information. 3. statistics drawn nq, n-Φ, nq-Φ more spectrum, easy operation and maintenance personnel to view the analysis. 4. Based on historical data PD parameters chart, the development of PD to visualize. 5. PD data can be accessed (with GPRS wireless communication unit, real-time monitoring data by accessing a remote server) via smartphone.