I. Overview

The MS-GTU-PD808 Partial Discharge Simulation Device is a specialized scientific research instrument designed to simulate the partial discharge phenomena that occur during the operation of 35–220 kV Gas-Insulated Switchgear (GIS) equipment.

It serves as a test platform for various diagnostic techniques, including pulse current, Ultra-High Frequency (UHF), ultrasonic, high-frequency, and SF6 gas analysis methods. The device fully complies with the requirements of relevant industry standards, including *DL/T 417-2019 Guidelines for On-site Measurement of Partial Discharge in Power Equipment*, *GB/T 7354-2018 High-Voltage Test Techniques—Partial Discharge Measurements*, and *DL/T 1694.1—2017 UHF Partial Discharge Online Monitoring Devices*.

The MS-GTU-PD808 Partial Discharge Simulation Device boasts several key advantages: extremely low inherent partial discharge levels, compact dimensions, light weight, immunity to climatic variations, and exceptional ease of use. Consequently, it is an indispensable piece of equipment for power grid partial discharge testing, scientific research and educational institutions, GIS manufacturers, and manufacturers of partial discharge detection instruments.

II. Structure:

The product features a completely novel design concept, material selection, and manufacturing process. As a result, it not only offers a compact size, light weight, and aesthetic appearance but also ensures that all technical specifications meet the requirements of the *JB3570-98* standard. Manufactured using a brand-new fabrication technique, the device utilizes dielectric insulation materials that are fundamentally distinct from those found in conventional products; this innovative approach enables the device to achieve an ultra-low partial discharge level of ≤ 3 pC.

III. Working Principle:

The device features an integrated, partial-discharge-free high-voltage source, ensuring a partial discharge level of ≤3 pC at the rated voltage. In "live-operation" mode, the user can freely select specific discharge types and precisely control the inception voltage, extinction voltage, and discharge intensity for each discharge signal. Utilizing both traditional partial discharge test equipment and wireless sensing technologies, the system facilitates the detection of various discharge types within GIS—including tip, floating, void (gas gap), particle, and surface discharges. It supports the simultaneous generation of multiple composite discharge types, thereby providing a comprehensive test platform for detection technologies such as pulse current, UHF, ultrasonic, HF, and SF6 gas analysis.

IV. Operating Environment:

1. Ambient Temperature: -10°C to +50°C; suitable for both indoor and outdoor use, capable of continuous long-term outdoor operation.

2. Protection: Equipped with an outdoor rain cover; features dust-proof and rain-proof capabilities.

3. Relative Humidity: ≤90% RH.

4. Altitude: ≤5500 meters.

1. High-Fidelity Physical Structure
Designed based on actual industrial-grade GIS structures, it accurately reproduces the internal electric field distribution and the evolution process of partial discharge.
2. Compact, Integrated Design
High-voltage components—such as step-up transformers and coupling capacitors—are housed directly within the GIS enclosure, ensuring high integration and robust safety protection.
3. Multi-Dimensional Defect Simulation and Composite Modeling
Supports the simulation of typical faults such as free-moving particles, floating potentials, sharp-point discharges, internal air gaps, and surface flashovers, as well as the superimposed evolution of multiple fault modes.
4. Precisely Controllable Fault Parameters
Discharge types can be switched at will, and parameters such as inception voltage, extinction voltage, and discharge amplitude can be quantitatively adjusted for various discharge signals.
5. Fully Compatible Detection Interfaces
Provides a complete set of standard test interfaces for mainstream detection methods, including the pulse current method, UHF, AE (acoustic emission), HF, and SF6 gas decomposition product analysis.

6. Traceability and Standard Calibration
Features built-in coupling and calibration units for the pulse current method, supporting multi-parameter synchronous measurement and metrological verification.
7. High Reproducibility and Long-Term Stability
Fault simulation modules are designed for durability and repeated use, maintaining highly stable physical characteristics of discharge pulses.
8. Simplified External Control
Fault states can be triggered, adjusted, and cleared from outside the device without disassembling the main structure.
9. Diverse Basin-Type Insulator Specifications
Equipped with various types of basin insulators—including fully shielded, bare, and cast-inlet versions—to meet diverse testing requirements.
10. Visual Monitoring of Fault States
Integrated infrared and video monitoring probes allow for real-time observation of the internal chamber and dynamic capture of optical and electrical images during partial discharge.
11. Integrated Sensor Comparison
A built-in high-sensitivity UHF sensor serves as a standard reference, facilitating sensitivity and performance comparisons with the equipment under test.

Equipment Name: Partial Discharge Simulation System

Model: MS-GTU-PD808

High-Voltage Unit

① Rated High Voltage: 100 kV

② Rated Operating Frequency: 50 Hz

③ Partial Discharge Level: ≤ 3 pC (at rated voltage)

④ Measurement Voltage: 100 V

⑤ Insulating Medium: SF6 Gas

⑥ Filling Pressure: 0.35 MPa

⑦ Filling Temperature: 25°C

⑧ Gas Replenishment Pressure: < 0.25 MPa

⑨ Annual Leakage Rate: ≤ 1%

Control System (Includes Isolation Transformer)

⑩ Rated Capacity: 5 kVA

⑪ Input Voltage: 220 V

⑫ Input Current: 22.73 A

⑬ Output Voltage: 0 – 250 V

⑭ Output Current: 20 A