Efficient Application of Digital-Analog Integrated Relay Protection Test Sets in Power System Operation and Maintenance

I.Core Product Advantages

Supports digital signal output (e.g., SV, GOOSE) under the IEC 61850 standard, compatible with digital protection testing in smart substations.
Simultaneously possesses high-precision analog output (voltage, current) for testing traditional electromagnetic and microprocessor-based protection devices.
Achieves "one instrument for the entire substation," significantly improving testing efficiency and reducing equipment procurement and maintenance costs.

Pure output current and voltage waveforms, with precise control of amplitude, phase, and frequency, meeting international standards such as IEC 60255.
Built-in high-performance power amplifier module supports long-duration high-current output, suitable for complex test scenarios like circuit breaker tripping tests and differential protection tests.

Comes with professional test software supporting automatic testing, vector analysis, harmonic analysis, differential characteristic testing, state sequence simulation, and other functions.
Provides a graphical user interface, allowing users to customize test sequences, generate test reports with one click, and export in formats like PDF and Excel for easy archiving and auditing.

Lightweight design for easy portability on site; features good electromagnetic compatibility and protection rating, adaptable to harsh field environments.
Built-in high-performance battery supports extended field operation, suitable for various scenarios such as substation inspection, commissioning, and fault排查 (troubleshooting).

II. Typical Application Scenarios

Application Need: Smart substations use the IEC 61850 communication protocol, with protection devices receiving samples via SV and tripping via GOOSE; traditional analog test sets cannot perform closed-loop testing.
Solution: Use the digital interfaces of this test set to simulate a Merging Unit (MU) outputting SV messages, while simultaneously receiving GOOSE trip signals from the protection device, achieving complete "digital protection closed-loop testing."
Value Delivered: Significantly improves commissioning efficiency, ensures the correctness of smart substation protection logic, and shortens the commissioning cycle.

Application Need: Periodic testing of line protection, transformer protection, busbar protection, etc., requires testing protection functions such as overcurrent, distance, earth fault, and differential.
Solution: Using the analog output module, accurately apply fault currents and voltages to automatically complete tests for parameters like protection pickup values, operating times, and reset ratios.
Value Delivered: Automates the testing process, reduces human error, and improves test consistency and traceability.

Application Need: After a grid fault occurs, it is necessary to replay the fault waveform to verify the protection device's operation.
Solution: Import COMTRADE fault recording files; the test set can accurately replay the fault event to verify if the protection device responded correctly.
Value Delivered: Assists in incident analysis, improves fault handling capability, and aids in optimizing protection settings.

Application Need: Power companies require practical training and skill assessment for protection personnel.
Solution: Utilize the test set's various fault simulation functions to build typical test scenarios for practical training and assessment of protection personnel.
Value Delivered: Enhances the overall technical level of the O&M team, ensuring the safe operation of the power grid.

III. Summary of Customer Value

Dimension	Value Delivered
Efficiency Gain	Versatile all-in-one device reduces equipment switching, improving testing efficiency by over 50%.
Cost Optimization	Reduces costs for procuring and maintaining multiple devices, lowering inventory pressure.
Data Management	Automatic test report generation supports electronic archiving, meeting the IT management requirements of the power industry.
Safety & Reliability	High-precision output ensures credible test results, reducing the risk of maloperation/failure to operate.
Future Compatibility	Supports the development of digitalized and smart grids, possessing long-term technical viability.

IV. Service Support (Whole Life Care Manager)

IEE-Business provides full lifecycle service support for this product:

Rapid Response: Technical issue response within 24 hours, global warranty support.
Software Upgrades: Regular推送 (push) of functional updates, supporting new protocols and standards.
Training Support: Provides on-site or online operational training to ensure user proficiency.
Certification Assurance: Products are certified (e.g., CE, ISO), ensuring quality and compliance.