Debugging method of relay protection system in substation

1. Debug the overall relay protection system of the substation

In the debugging should be in the direction of power input and signal transmission of the overall system debugging, according to the function and control of the unit characteristics of the system debugging work, so that the substation relay protection system debugging cover the whole function, to achieve no errors and omissions in performance. In order to ensure the comprehensive debugging of the main function equipment and communication operating system of substation relay protection system, we should strengthen the technical detection of optical cable and terminal, so as to ensure the effective communication function. The debugging of relay protection system, when tested directly from the equipment port, the optical fiber device must be plugged and removed, but the safety isolation of test data is reliable and obvious fracture can be seen; When testing the optical fiber on a switch port, you do not need to remove or insert the optical fiber, but switch the corresponding functions of other devices to avoid operation accidents. Debugging of a running system, if tested from a switch port, may involve switching configuration changes. To debug the operating system of the device, you are advised to directly test the device port by removing and inserting the optical fiber and perform related operations.

2. Do a good job of protection and debugging of heavy current fault of relay protection device in substation

In order to realize the debugging and function of substation relay protection system, it is necessary to comprehensively adjust the high current fault, so as to ensure the stability of substation relay protection system. The high current generator generates a primary current for the use of the standard transformer and the electronic transformer. The sampling data testing equipment collects the output data of the combined unit and verifies the accuracy of the electronic transformer. A standard transformer is required. Similarly, the combined unit is required to be included in both the transformer test and the protection system test to ensure that the test work is free of dead zones. The polarity and phase sequence of the ct are tested as well as the accuracy of the ct. In the substation relay protection system debugging, we should carry out the debugging test of high current short circuit fault, test the substation relay protection system short circuit and instantaneous load capacity, improve the substation relay protection system to abnormal conditions of the performance.

3. Do a good job in the substation relay protection system isolation measures protection inspection

The signals of the smart substation are connected through the network. In order to avoid human accidents, safety isolation measures should be adopted during maintenance and testing. The safety isolation measures mainly include throwing and removing the soft pressure plate and inserting and removing the optical fiber. The soft pressing plate involves the state overhaul and maintenance of the main interval combination unit and the overhaul interval combination unit of the differential unit. It is necessary to strengthen the debugging and inspection according to the isolation measures of substation relay protection system. The substation relay protection system can be repaired by the combined unit of the parent difference interval, and the pressure plate can control the parent difference device to process the sampling data of the combined unit. Exit the platen for the corresponding unit data and bus differential current calculation, processing bus differential protection device combined unit does not correspond to the data, but the data still need to be transmitted to the bus differential protection device. Maintenance-related soft pressure plate is based on the reliability of the software. If there is a need for obvious safety isolation measures, you can use optical fiber for switching, and plug and remove from the corresponding port to ensure the absolute safety of maintenance.

4. Check the homologous phase sequence of substation relay protection system

For single-phase operation of equipment in substation relay protection system, phase sequence check of primary equipment can be realized through independent phase closing of A, B and C on the power side. Phase A, B and C on the power side should be independently closed, and then the panel and monitoring system screen of the integrated device should be tested to confirm whether the voltage channel simulation quantity is correct. When the substation relay protection system is checked, it is necessary to ensure that there is protection operation on the power supply side, so as to determine the protection and safety of the substation relay protection system. It can complete the phase sequence check of the circuit, bus and transformer interval of the related voltage level. For connecting the main transformer, the busbar phase sequence of the relay protection system of the substation is determined through the single-phase recloser of the high voltage side of the main transformer. For substation relay protection system, the line is not equipped with the interval of voltage transformer, the phase sequence needs to be determined by the voltage transformer of the relay protection system of the opposite side of the substation. Cut off the power supply on the line side of the relay protection system of the substation and connect it to the voltage transformer. The single-phase reclose on the high-voltage side of the transformer of the relay protection system of the substation in this side can complete the phase sequence check of the low-voltage line through the detection of the voltage transformer.