Online Partial Discharge Monitoring System

• Type: Universal Testing Machine
• Accuracy Grade: 1
• Load Way: Electronic Load
• Loading Method: Dynamic Load
• Control: Computer Control
• Weight: 0-100Kg
• Model NO.: GDPD-GIS
• Power Source: AC220V
• Bandwidth limit: 100K-100MHz analog input bandwidth optional
• Sampling rate: 100MS/s single sampling
• Trigger mode: external trigger or power trigger
• Communication Protocol: TCP/IP Network Protocol
• Transport Package: Standard Export Wooden Box
• Specification: ISO, SGS
• Trademark: HV Hipot
• Origin: Wuhan, China
• HS Code: 9030849000
• Production Capacity: 10000 PCS/Year

Product Description

 Online Partial Discharge Monitoring System GDPD-GIS

General Information

Gas-insulated metal-enclosed switches (GIS) and gas-insulated metal-enclosed transmission lines (GIL) are one of the most important devices in the power system. They have the dual tasks of control and protection. If they failed during operation and the problem cannot be solved timely, it will cause serious damage to the grid. Partial discharge fault is a common fault type of GIL/GIS. It is necessary to use GIS partial discharge online monitoring and fault location system to perform real-time online monitoring of GIL/GIS partial discharge signals and analyze and process the measured data and real time give comprehensive judgment of insulation status. Then repair schedule can be arranged according to the monitoring results to avoid major grid accidents caused by equipment failure and to ensure the normal operation of the system with minimum maintenance cost.

There are many reasons for the deterioration of the dielectric medium, such as ionization corrosion caused by a strong electric field for a long time, insulation wear caused by mechanical high-frequency vibration, aging decomposition of the medium caused by thermal effects, and moisture insulation. The dielectric medium is degraded, and the performance is degraded so that the dielectric breakdown has a development process, which makes the on-line monitoring of insulation practical and effective. The system uses Smart Quick software developed totally by HVHIPOT. It uses advanced high-speed DSP digital processing technology and software. The processing technology makes our monitoring system fast and accurate, which is the most economical and reliable solution for the online monitoring system of GIS.


Principle

Through installing UHF sensor on the key components of GIL/GIS, to collect 500MHz-1500MHz electromagnetic wave signal excited by the partial discharge of GIL/GIS in real time. It also collects feature quantities such as amplitude (Q), phase (Φ), frequency (N), and cycle sequence (t) of the partial discharge pulse signal that reaches the trigger condition by detection frequency reduction circuit, high speed sampling circuit and data processing buffer circuit. Event files are generated and uploaded to upper computer expert diagnosis system, to perform event map establishment and monitoring equipment insulation state analysis.


Technical Specifications

PD sensor specifications
 

Index	Name	Value	Unit	Remark
Environment	Working temperature	-25 ~ +65	ºC
	Working humidity	< 95%	/
Performance	Sensitivity	-80(internal) -75(external)	dbm
	Measurement bandwidth	300-2000	MHz
	Measurement accuracy	0.1	dB
	Average equivalent height	> 10	mm
	Over-voltage protection	Yes
	Signal interface	N type RF terminal	/
Appearance	Material	6061 Aluminum alloy (indoor) 304 Stainless steel (outdoor)	/
	Size	Customized	mm	Customized
	Waterproof	Yes
	Lifetime	> 50	Year
	Voltage class	All voltage ranges are suitable	/

IED unit (PD collector)
 

Index	Name	Value	Unit	Remark
Working power supply and environment	Power input	AC 120-240	V
	Power consumption	< 30	W
	Working temperature	-25 -- +65	ºC
	Working humidity	< 95%	/
Performance	Self-checking function	Yes	/	Self-checking after startup
	Sensor	Built-in or external	/
	Bandwidth	300--1500	MHz
	Measurement range	-80-- -20	dBm
	Measurement accuracy	0.1	dB
	Sensitivity	-80	dbm
	Channel	4-16	pcs
	Synchronous scan channel	All channels	/
	Sampling rate	≥100	MHz
	Refresh rate	≤ 1	s
	Sampling mode	24h continuous	/
	Sampling time coverage	100%
	Discharge type identification	5types above
	Monitoring content	Discharge amplitude(Q), Phase(Φ), Times(N), Discharge rate	/
	PD fault location	Yes	/
	Synchronization signal	Power supply or other	/
	Noise cancellation	Yes	/
	Over-voltage protection	Yes	/
	Signal input interface	N type RF terminal	/
	Communication interface	RJ45, Fiber optics SC or ST	/
System performance	Cabinet	2U/19inch plug-in case. Or outdoor hang-type(304 stainless steel) For option
	Lifetime	20	year
	Voltage class	All voltage ranges are suitable	/
	Extension	Max. 1000pcs	/	Distributed networking
Test condition	EMC test	Pass	/
	System performance test	Pass	/