In the huge and complex power system of thermal power plants, the grounding system is an important line of defense to ensure equipment safety and personal safety. Once a grounding fault occurs, if the fault point cannot be located in a timely and accurate manner, it may cause equipment damage, power outages, and even fires, resulting in huge economic losses and safety risks. Traditional grounding fault detection methods often have problems such as low positioning accuracy, poor anti-interference ability, and inability to adapt to multi-node complex systems. As a new generation of power system safety guardian, the JZ-IPD-IV intelligent grounding device has brought hope for solving this problem with its excellent performance and innovative technology.

1. JZ-IPD-IV intelligent grounding device: technological innovation leads to precise positioning

The JZ-IPD-IV intelligent grounding device adopts a number of advanced technologies, which has achieved a qualitative leap in fault positioning accuracy, anti-interference ability and system adaptability:

1. High-precision synchronous sampling technology: JZ-IPD-IV adopts high-precision synchronous sampling technology, which can simultaneously collect voltage and current signals of multiple nodes, and ensure that the time synchronization accuracy between the signals of each node reaches the microsecond level. This high-precision synchronous sampling provides a reliable data basis for subsequent fault analysis and positioning.

2. Wavelet analysis and fault feature extraction: JZ-IPD-IV uses wavelet analysis technology to perform multi-scale decomposition on the collected signals and extract fault features. Wavelet analysis can decompose the signal into components of different frequencies and highlight the transient characteristics of the fault signal, thereby effectively distinguishing normal signals from fault signals and improving the sensitivity and accuracy of fault detection.

3. Traveling wave positioning principle: JZ-IPD-IV adopts the traveling wave positioning principle and uses the propagation characteristics of the transient traveling wave generated by the fault in the power line to calculate the distance from the fault point to each monitoring node. Through the distance information of multiple nodes, the spatial location of the fault point can be accurately determined.

4. Adaptive impedance matching technology: JZ-IPD-IV adopts adaptive impedance matching technology, which can automatically adjust the matching parameters according to the actual impedance characteristics of the line and eliminate the influence of signal reflection and attenuation on positioning accuracy.

5. Multi-node networking technology: JZ-IPD-IV supports multi-node networking, which can monitor the status of multiple grounding points at the same time, and improve the accuracy and reliability of fault location through the collaborative work between nodes.

6. Anti-interference design: The device adopts multiple anti-interference measures, including hardware filtering, digital signal processing, and intelligent algorithms, which can effectively suppress electromagnetic interference, harmonic interference and noise interference on site, ensuring accurate detection and positioning of faults even in complex electromagnetic environments.

7. Intelligent diagnosis: JZ-IPD-IV has a built-in fault diagnosis expert system that can automatically identify the type of fault, analyze the cause of the fault, assess the severity of the fault, and provide maintenance suggestions.

2. Factors affecting positioning accuracy and optimization

Although the grounding device JZ-IPD-IV already has a high positioning accuracy, there are still some factors that affect its performance, which need to be paid attention to and optimized in practical applications:

1. Sensor installation: The installation position and method of the sensor have a great influence on the signal quality. Ensure that the sensor is firmly connected to the measured line and has good contact to avoid looseness and poor contact. At the same time, the installation location of the sensor should be as far away from strong electromagnetic interference sources as possible.

2. Line parameters: The impedance characteristics, length, distributed capacitance and other parameters of the line will affect the propagation speed and attenuation of the traveling wave. Before fault location, these parameters need to be accurately measured and input to improve the positioning accuracy.

3. Synchronization error: The synchronization error between each node will directly affect the accuracy of traveling wave positioning. The clock of each node should be calibrated regularly to ensure that the synchronization accuracy meets the requirements.

4. Environmental factors: Environmental temperature, humidity, electromagnetic interference and other factors may affect the performance and signal quality of the sensor. Appropriate protective measures should be taken to reduce the impact of environmental factors.

5. Algorithm optimization: The positioning algorithm can be optimized according to the actual situation on site, such as using more advanced filtering algorithms, more accurate wave velocity calculation methods, and more intelligent fault identification models.

3. JZ-IPD-IV helps power plants operate safely and efficiently

A large thermal power plant uses a small current grounding method for its 6kV distribution system. Grounding faults occur frequently and the fault point is difficult to find, which seriously affects the safe production of the power plant. The plant introduced the JZ-IPD-IV intelligent grounding device to monitor multiple key nodes of the 6kV distribution system in real time.

During an equipment maintenance process, a single-phase grounding fault occurred in the 6kV distribution system due to misoperation by the staff. JZ-IPD-IV immediately issued an alarm and accurately locked the location of the fault point within a few seconds, with an error of only 1.5 meters. The maintenance personnel quickly rushed to the fault point to deal with it, avoiding the expansion of the fault and ensuring the normal power supply of the power plant.

Post-event analysis shows that JZ-IPD-IV not only accurately locates, but also responds quickly, which wins valuable time for fault handling. In addition, JZ-IPD-IV also provides detailed fault information, including fault type, fault time, fault phase, etc., which provides strong support for accident analysis and prevention.

JZ-IPD-IV intelligent grounding device is not only the “smart guard” of power system safety, but also an important technical support for realizing smart grid and ensuring power safety.

When looking for high-quality, reliable intelligence ground monitor, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:
E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

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