Operation analysis and key points of power quality testing for new generation of intelligent substation electronic transformers
Electronic transformer analysis and power quality monitoring ensure stable and efficient operation of smart substations.
Type
Tags
Solution maturity
Mass promotion / Mass production
Applicable industry
Applications
Key innovations
The innovation of this project lies in the development of two key technologies for intelligent substation. The first is to realize real-time operation analysis and independent reliability evaluation models of electronic transformers based on SV data. The second is to adopt 12.
Potential economic benefits
This technology significantly reduces equipment failure rates and maintenance costs by improving the operating reliability and power quality monitoring capabilities of electronic transformers in smart substations, optimizes power grid operating efficiency and stability, and reduces power losses.
Potential climate benefits
This project significantly reduces transmission and distribution losses, optimizes the operating efficiency of power grid equipment, and avoids energy waste by improving the operating reliability and power quality monitoring of smart substations. Accurate real-time data analysis helps optimize power grid operation strategies and reduce overall energy consumption of the power system.
Solution supplier
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State Grid Shanghai City Electric Power Company
State Grid Shanghai City Electric Power Company provides Shanghai with a safe and reliable power supply and ensures urban operation and development.
Shanghai，China
Solution details
- field of science and Technology
This project mainly conducts research on key technologies for operation analysis and power quality testing of electronic transformers in smart substations. - Main technological innovation content
The research results of this project focus on the research on two key technologies of the new generation of smart substations: the research on the real-time operation analysis technology of electronic transformers based on sampled values and the research on the power quality collection and analysis system of smart substations based on urban power grid monitoring. The promotion and application of its results will also promote the construction and development of smart substations in the future, and its direct and indirect benefits will be very significant.
Research direction 1 of this project proposes a method for monitoring the status of electronic transformers in smart substations based on SV data, and establishes a reliability evaluation model independent of hardware, etc., and evaluates the reliability of electronic transformers through long-term monitoring and analysis of reliability, stability and correctness of the output effect of electronic transformers.
Research direction 2 of this project proposes an implementation method for intelligent substation power quality monitoring that uses a 12.8kHz sampling rate that fully supports the IEC61850 model. An independent process layer network based on the 12.8kHz sampling rate is established. The inter-layer power quality online monitoring device is based on the IEC61850 model. Based on the IEC61850 model, it provides analog input, switching input, real-time measurement data uploading, Standardized modeling is carried out in aspects such as event messages and quantity values, and monitoring data is sent up in standard PQDIF format files. - promotion situation
The WHJ-801 electronic transformer monitoring device developed in this project has been successfully applied in the pilot project of Yetang Substation. By sampling the SV data output by the electronic transformer in real-time operation in real time, detecting anomalies based on the SV data abnormality diagnosis model, and analyzing the monitored anomalies. Long-term records, regular classification statistical analysis, and long-term trend comparison analysis; through comparative analysis of different aspects of historical data, the reliability of the electronic transformer is analyzed and evaluated.
The WIPM-801 intelligent substation power quality online monitoring device and in-station management system developed in this project have been successfully applied in Yetang Substation pilot. By directly increasing the sampling rate to 12.8 kHz in the electronic transformer collector, it simultaneously outputs two process layer networks with mutually independent sampling rates of 4 kHz (for in-station protection devices, etc.) and 12.8 kHz (specially for power quality monitoring). One device centrally completes the monitoring functions of voltage transient events and steady-state power quality data at multiple monitoring points, and analyzes and evaluates the operating status of the monitoring point system. The device generates a standard PQDIF format steady-state power quality data file to effectively combine it with the existing Shanghai Power Grid power quality monitoring system. It combines harmonic pollution and sagging impact data with known operating methods, enabling existing power quality analysis methods to be improved.
Last updated
01:01:04, Nov 08, 2025
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