Discussing the investigation and treatment measures of hidden dangers in relay protection

With the continuous deepening of power grid construction, the complexity of the power system continues to increase, so some faults will inevitably occur during its operation. This requires the relay protection device in the system to play a role in preventing the expansion of the impact of faults. . The specific function of the relay protection device is to send out certain information so that other electrical equipment can effectively isolate faults during operation.

1. Analysis of the operating characteristics of power system relay protection and automation devices

At present, the faults encountered in the operation of power systems can be roughly divided into two types, namely, failure to operate and malfunction. The former means that when a fault occurs in the power system, the relay protection device does not act in time to isolate the fault point, resulting in the expansion of the fault scope and ultimately endangering the normal operation of the power system. The latter means that the power system operates in unexpected ways due to the influence of external factors. The cause of this failure is the characteristics of the relay protection device itself. Therefore, the main function of the automation device is to monitor various parameters of the system operation. Once the precise parameters cannot be grasped, it means that the automation device is faulty.

2.Reliability indicators of relay protection and automation devices

The reliability of relay protection and automation devices is mainly reflected in the reliability of the equipment function, the reliability of the equipment itself, and the probability of malfunction or refusal of the equipment. Usually, the reliability evaluation index mainly consists of three parts: success rate (R), average lifespan and effectiveness (A). Success rate refers to the ability of a device to successfully complete specified functions in a specific environment. Average life refers to the time the equipment works without failure. Availability refers to the effective working time of the equipment before irreparable failure occurs.

In the power system transmission operation, in order to improve the overall power transmission effect, the relay protection and automation devices in the power operation system should be effectively managed. During the configuration process, it is necessary to ensure the safety of power enterprises during the power distribution process and ensure the smooth operation of power erection and configuration. In the operation and control of power facilities, the power transmission relay protection system should be strictly controlled in accordance with the regulations and requirements of the power enterprise, the power transmission structure should be adjusted, and an effective power transmission operation system should be established to truly improve the overall control and erection effect. 

When carrying out installation work, attention should be paid to the following issues: First, carefully select relevant equipment, recombine the structure and infrastructure of the power transmission system, ensure the reasonable operation of various equipment and equipment, and improve the power transmission effect. Second, during the power transmission process, rectification must be carried out in accordance with the power transmission construction requirements, and the use of relevant equipment must be adjusted to truly meet the configuration requirements of relay protection and automation devices.

3. Investigation and treatment measures of hidden dangers in relay protection

3.1 Solutions to operational failures

Professional maintenance personnel will use the reference method to detect faults. This fault detection method is not only targeted, but can also improve the efficiency of fault detection and shorten the damage time of the system in actual operation. During the circuit transformation of the power system, many different problems will be encountered, especially when the relay protection device needs to be replaced, or when it is difficult to restore the secondary circuit wiring during actual wiring, etc. , the reference method can be used to complete power system maintenance work, which has a very positive impact on the rapid restoration of normal operation of the power system.

When applying relay protection devices to verify the overall operating effect of the power system, if it is found that the measurement of one of the relays is significantly different from the overall fixed value, there is no way to determine whether the relay itself is When there is a quality problem, you should not directly adjust the scale value of the relay or the relay itself. Instead, you need to conduct common analysis and data measurement with other relays of the same type to ensure that two relays of the same type belong to the same circuit and measure Only when the result is accurate can we analyze whether there is a problem with the relay.

Once there is a quality problem with the relay itself, the relay can be replaced. This kind of reference method maintenance is very important for the operation of the power system. It also requires all maintenance managers to have an in-depth understanding of how to use the reference method. Issues related to maintenance management. Maintenance personnel need to conduct timely inspections of the internal components and circuits of the relay protection device to eliminate possible safety hazards, especially the different problems in the current, voltage and power supply contained therein. Maintenance personnel must carry out targeted repairs to ensure that the relay protection devices in the power system are always in normal operation.

The relay protection tester we produce is specialized in testing the health of relay protection devices. If you need it, please click on the yellow font to view the product details. Of course, you can also leave us a message and we will provide you with the best Quotes and product information.

3.2 Improve the reliability of relay protection automation devices

First, record the initial status of the relay protection automation device. The structures and functions of relay protection automation devices currently used in power systems are very diverse, so parameter changes may occur during actual operation, causing device failures. Therefore, its initial status should be recorded in detail to provide support for system management.

Secondly, make statistics on the operation of relay protection automation devices. During the operation of the relay protection automation device, managers must conduct comprehensive statistics on various parameters in order to master the operation status of various equipment in the power system, achieve dynamic management, and timely discover and eliminate problems existing in the system. faults, creating good conditions for the safe and stable operation of the power system.

3.3 Install microcomputer protection device

The microcomputer protection device is an economical protection device that integrates measurement, control, protection and communication. It is tailor-made for the high-voltage distribution room at the terminal of the distribution network. With three-stage current protection as the core, it has power grid parameter monitoring and collection functions. It can save traditional ammeters, voltmeters, power meters, frequency meters, energy meters and other equipment, and can transmit measurement data and protection information to host computer, thereby easily realizing distribution network automation. According to the characteristics of the power supply of the distribution network, this equipment integrates the function of the backup power automatic switching device, and can flexibly realize the incoming standby switching and bus separation standby switching functions.

At present, in order to ensure the accuracy of the operation of relay protection devices, it is necessary to integrate relay protection devices with microcomputer devices so that they can work in one system. The microcomputer device has unparalleled advancements in other equipment and can effectively resist the interference of external magnetic fields on the entire power system and ensure the stable operation of the power system. At the same time, as an advanced automation equipment, the microcomputer device has a self-detection function. When a problem occurs, the cause and location of the fault can be discovered in time and detailed analysis can be made to facilitate operation and maintenance personnel to quickly troubleshoot. This not only saves time for electrical work, but also effectively proves the diversified functions of microcomputer devices compared with traditional devices, fully embodying its irreplaceable role in the power system. Through microcomputer device analysis, staff can more easily find faults and repair them, ensuring the stable operation of the power system and bringing certain protection to people's safety and interests. Therefore, it is very necessary to install microcomputer devices in power relay protection systems.

3.4 Strengthen the management of relay protection automation devices

The power system relay protection automation device contains a large amount of relay protection software. The stable operation of these software is an important basis for ensuring the normal performance of the relay protection automation device. If the management of relay protection is neglected, it is easy to cause problems in the operation of the relay protection automation device due to irregular operation of the software, thereby causing malfunctions. In this regard, we must accelerate the improvement of the relay protection operating system and enhance the binding force on relay protection operations.

At the same time, we must do a good job in software upgrades and updates, promptly eliminate problems in the operation of automation devices, and maximize their protective effects. At the same time, the computer system is regularly used to debug the device software. On the one hand, the adaptability of the relay protection system and power system operation is improved, and on the other hand, the staff are helped to master the operating methods after the software upgrade as soon as possible. Only in this way can we lay the foundation for the effective implementation of management work. solid foundation.

Conclusion

For modern people, the power system can be said to be an indispensable energy system in life to a certain extent. If there is a problem, it may have a very large impact. During its operation, it will go through multiple links. If there is a problem in one link during the process, it may cause the entire system to fail to operate normally. Relay protection is a component that can provide guarantee for the operation of the power system. Through its protection, the occurrence of system faults can be reduced. When a fault occurs, the impact of the fault can be reduced as much as possible. Of course, if something goes wrong, it will have a huge impact on the power system.