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

I.Core Product Advantages

• Integration of Digital and Analog Dual Modes

• 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.

• High Precision and High Stability

• 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.

• Intelligent Test Software Platform

• 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.

• Portable Design and High Reliability

• 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

1. Smart Substation Commissioning and Acceptance

• 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.

2. Traditional Relay Protection Periodic Testing

• 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.

3. Fault Replay and Incident Analysis

• 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.

4. Training and Skill Assessment

• 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

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.