GIS partial discharge online monitoring device（Winfoss-X6）

Intuitively provide the probability results of discharge fault diagnosis; Remote monitoring and diagnosis, direct output of maintenance plan! More than 100000 fault diagnosis samples, precise judgment and analysis!

product overview

According to《Design requirements for QGDW 534-2010 Technical Guidelines for Online Monitoring System of Substation Equipment and QCSG11401-2010 Technical Specification for Partial Discharge Ultra High Frequency Detection of Gas Insulated Metal Enclosed Switchgear (GIS).Partial discharge is the electrical breakdown of a localized area in electrical insulation, typically characterized by burrs or sharp edges on the surface of a conductorIf SF6 gas contains metal particles, if the surface of insulation parts in GIS is not smooth enough or contains dust impurities, if the weld seam on the inner surface of the shell is uneven or rough, especially when the contact resistance of switch contacts increases due to oxidation during operation, it will cause electric field distortion and partial discharge.

GIS partial discharge online monitoring device（Winfoss-X6）superviseThe task of testing and diagnosis is to understand and master the operating status of equipment, including adopting various detection, measurement, monitoring, analysis, and discrimination methods, combining the history and current situation of the system, considering environmental factors, evaluating the operating status of equipment, determining whether it is in a normal or abnormal state, displaying and recording the status, issuing alarms for abnormal states, so that operators can handle them in a timely manner, and providing information and preparing basic data for equipment fault analysis, performance evaluation, rational use, and safe work.Realize state maintenance of switch insulation, reduce power outage time and save management and maintenance costs.

Technical principles

When partial discharge occurs, electromagnetic wavesThe signal is based onThe GIS structure repeatedly propagates, reflects, refractsDelay, attenuation, and other phenomena are radiated to the outside through bowl insulators (insulating components).pass throughThe electromagnetic waves leaked from GIS insulators are detected through high-sensitivity built-in or external sensors. Detecting electromagnetic wave signals excited by partial discharge inside GIS through sensors, the detected signals are filtered, amplified by RF preamplifiers, and detected by detectors. The high-speed data acquisition module samples, stores, processes, and analyzes the signals, and the data processed by the on-site monitoring unit is uploaded to the main processor unit through optical fibers; The main processor unit, through the fault diagnosis expert system running on it, receives data from the on-site monitoring unitEstablish a fault mode database based on the data, andDiagnose the insulation status of GIS and display discharge fingerprint characteristic data in multiple ways; The partial discharge historical measurement data stored on the main processor unit can be queried by staff and remote management systems.

GIS partial discharge online monitoring device（Winfoss-X6）Can be monitored and recorded online at any timeGIS status and use diagnostic systems to analyze and judge the operating status of equipment. When GIS encounters anomalies, the system quickly collects and processes fault data, while completing functions such as online calculation, storage, statistics, alarms, analysis reports, and remote data transmission.

major function

lReal time monitoring, processing, and display of partial discharge activity inside the equipment;

lPower phase synchronization and external synchronization are optional to obtain discharge phase;

lAutomatic recording and playback of partial discharge data;

lPartial discharge signal amplitude ratio clustering separation technology and time-frequency clustering separation technology eliminate interference signals, achieve multi signal waveform separation, and determine discharge types;

lDisplay and analysis of various two-dimensional and three-dimensional discharge mode spectra;

lOpen management of fault mode expert database;

lAutomatic recognition and severity assessment of partial discharge fault modes;

lAnalysis and evaluation of the historical development trend of partial discharge;

lAutomatically generate test reports;

lSystem fault self check and self recovery function.

FEATURES

Structural features (built-in)

lHigh detection accuracy and strong anti-interference ability；

Various electromagnetic interferences in the substation environment, including air corona discharge, mobile communication, electric sparks, relay interference, etc., have an impact onSensitivity detection and precise positioning of partial discharge in GIS equipment.

lUsing signal time difference positioning method to achieve local broadcasting point positioning;

The ultra-high frequency electromagnetic pulse signal has a starting edge on the order of ns time, and multiple detectors are used to measure it simultaneously, which can accurately detect the position of partial discharge.

lInterference suppression related to waveform characteristics

Using the characteristic differences of signal detection waveforms to remove and shield interference signals;

lComparison of noise sensor synchronization and time-domain window interference suppression

Using synchronous pulses to determine whether the signal source is from internal or external sources, and effectively eliminating external interference signals;

lAmplitude ratio clustering interference suppression and multi-source discharge mode separation are effective when there are multiple discharge defects inside the equipment or discharge interference at the end of the high-voltage outlet sleeve or adjacent areasSeparate the waveforms of each discharge signal and identify the discharge type based on the waveforms;

lAccurately monitor the characteristic information of partial discharge, including maximum discharge amount, discharge phase, and number of discharges per unit time;

lOpen database, users can add new discharge models by themselves;

lEasy installation and simple maintenance.

Interface

Technical Parameter

lFrequency range:200-2000MHz bandwidth;

lSensitivity:<3pC (external<5pC);

lImpedance matching:50Ω；

lMinimum detection signal:<-60dBm(=0.001μW)。

Usage environment

lWorking temperature:-30℃~85℃；

lStorage temperature:-40℃~95℃；

lWorking humidity: not greater than95%RH；

lAtmospheric pressure:85kpa~106kpa；

lSeismic performance:20m/S²（Level 8).

design requirement

According to the Technical Guidelines for Online Monitoring System of Substation Equipment (QGDW 534-2010) issued by State Grid Corporation of China, the summary is as follows:

Article 6.2 Configuration Principle B: GIS with voltage levels of 220KV and above should reserve ultra-high frequency partial discharge sensors and testing interfaces for daily detection to meet the needs of live detection during operation; For abnormal partial discharge detection, a partial discharge online monitoring device should be configured for continuous or periodic tracking and monitoring.

Product Configuration

l1 GIS partial discharge monitoring server

l1 set of GIS partial discharge monitoring software

lBuilt in typeUHF partial discharge sensor is determined according to demand

lExternalUHF partial discharge sensor is determined according to demand (external or internal sensors are optional for users)

lLocal release masterIEDs (including control cabinets) are determined according to demand

lCoaxial cable (Tepcon) According to demand

lMain monitoring cabinet 1 side

lUser information such as factory inspection reports 1 set

Service guarantee

lProvide on-site installation, debugging, and training guidance, and conduct on-site demonstration operations.

lProvide detailed Chinese manuals and user guidance.

lOne year free warranty, lifetime spare parts support and maintenance.

lhotline365 days a week to answer user inquiries.