LQUP2024 Ultra-high Frequency Partial Discharge Detection System

The LQUP2024 represents the next generation of portable PD detection, combining UHF (300MHz-3GHz), ultrasonic, and HFCT sensors with Windows 7 OS for real-time multi-physics analysis of high-voltage equipment defects.

Core Technical Specifications

Multi-Sensor Integration

• UHF Sensor: 300MHz-1.5GHz for GIS internal discharges

• Ultrasonic Sensor: 20kHz-200kHz for surface tracking

• HFCT: 1MHz-30MHz for cable sheath currents

• Combined Sensor: Electric+acoustic for dry-type transformers

Hardware Configuration

Host Unit

• 6.5" TFT LCD (640×480)

• Intel 1.6GHz CPU

• 32GB SSD + 4GB RAM

• Win7 Embedded OS

Interfaces

• 2/4× BNC (50Ω inputs)

• 1× EXT trigger

• 2× USB 2.0 (mouse/keyboard)

• Gigabit Ethernet

Detection Methodologies

1. Transformer PD Analysis

Ultrasonic Method

Detects mechanical waves (20kHz-200kHz) propagating through transformer oil with sensitivity to:

• Winding deformations

• Bubble discharges in oil

• Floating component discharges

Pulse Current Method

Measures HF currents (1MHz-30MHz) in core grounding circuits using:

• Distributed capacitance coupling

• 100pF-1nF effective sensitivity

2. Switchgear Diagnostics

TEV (Transient Earth Voltage)

Detects ns-level pulses (3MHz-100MHz) escaping through shield gaps:

• 0.1-10mV typical amplitude

• Identifies insulation surface tracking

UHF Method

Captures electromagnetic waves (300MHz-1.5GHz) from:

• Internal corona discharges

• Floating electrode breakdown

Field Operation Features

Compliance & Applications

• Standards: IEC 60270, IEEE C57.124, DL/T 1630-2016

• Typical Use:

• GIS partial discharge localization

• Transformer factory acceptance tests

• Cable joint PD trending

Software Capabilities: Real-time PRPD analysis, phase-resolved mapping, FFT spectrum analysis, and automated report generation with defect classification.