In the operation and maintenance of power systems, ensuring the reliability and safety of equipment is of vital importance. For this reason, the monitoring and evaluation of parameters such as insulation resistance, loop resistance, opening and closing time, and concurrent measurement are particularly crucial.

I. Measurement of Insulation Resistance

Insulation resistance is a crucial indicator in power equipment, reflecting the performance of the insulating materials used in the equipment. The measurement of insulation resistance usually employs a megohmmeter, an instrument capable of applying high voltage to detect the resistance value of insulators. The level of insulation resistance directly affects the safety and stability of the equipment. If the insulation resistance is too low, it may lead to serious consequences such as leakage and short circuit. Therefore, regular testing of insulation resistance can effectively prevent equipment failures and ensure the normal operation of the power system.

During the measurement process, environmental factors such as temperature and humidity can have an impact on the insulation resistance value. Therefore, when conducting insulation resistance tests, it is necessary to select appropriate environmental conditions to ensure the accuracy of the test results. In addition, attention should also be paid to the insulation resistance standards of different equipment, and evaluations should be made based on the specific requirements of the equipment.

II. Measurement of Loop Resistance

The measurement of loop resistance is another important link in the power system. Loop resistance is mainly used to evaluate the quality of electrical connections and ensure that current can pass smoothly. The test of loop resistance usually employs a DC resistance tester. Its principle is to measure the resistance values at each connection point in the circuit by applying a certain current.

The level of loop resistance directly affects the working efficiency of the equipment. Excessively high resistance will lead to current loss, which in turn affects the performance of the equipment. Therefore, regular detection of loop resistance can not only enhance the working efficiency of the equipment but also extend its service life. In practical applications, the measurement of loop resistance should be combined with the maintenance cycle of the equipment to ensure that potential problems can be detected in a timely manner at critical moments of equipment operation.

III. Measurement of Opening and Closing Time

The opening and closing time refers to the time required for a circuit breaker to complete the opening or closing action after receiving a control signal. This parameter is crucial for the protection and control of the power system. The measurement of opening and closing time usually employs high-precision time measurement instruments to ensure its accuracy.

In the power system, the delay in the opening and closing time of the switch may cause the equipment to fail to cut off the fault current in time, thereby triggering more serious equipment damage. Therefore, regularly testing the opening and closing times can effectively enhance the protective performance of the equipment and prevent the occurrence of unexpected accidents. By comparing the opening and closing times of different devices, the performance differences of the devices can be discovered, thereby providing a basis for the improvement of the devices.

IV. Concurrent Measurement

Synchronicity measurement refers to the ability in a power system to ensure that multiple generators or power sources can operate synchronously when connected to the grid. This ability is crucial for the stability of the power system. The frequency and phase differences between different power sources may cause damage to the equipment or interruption of power supply. Therefore, conducting concurrent measurements is an important means to ensure the safe operation of the power system.

Synchronous measurement usually employs phase measurement instruments to assess the synchronization state of each power supply by measuring the phase difference. If the phase difference is found to exceed the specified range, the output of the generator should be adjusted in time to ensure its smooth grid connection. Regular concurrent measurements can effectively enhance the stability and reliability of the power system.

In the maintenance and management of power equipment, insulation resistance, loop resistance, opening and closing time, and concurrent measurement are indispensable links. These measurement techniques can not only enhance the safety of the equipment, but also improve the overall efficiency of the power system. With the continuous evolution of the power industry, related measurement technologies are also constantly developing. In the future, more advanced measurement equipment and methods may emerge to meet the growing power demand. Through regular monitoring and evaluation of these key parameters, power companies can effectively prevent equipment failures, reduce the occurrence of power outages, and thereby provide users with more stable and reliable power services. In conclusion, a thorough understanding and application of these measurement techniques will lay a solid foundation for the sustainable development of the power industry.