Digitalized transformation method for transformer substation

Abstract

The embodiment of the invention discloses a digitalized transformation method for a transformer substation. The digitalized transformation method comprises an original bus protection device upgrade step, a total-interval sub-machine analog quantity and IO quantity conversion step, a total-interval sub-machine data transmission step, a step of converting GOOSE receiving quantity into IO quantity, a duty-cycling control interval transformation step and a total-interval sub-machine exit step; after an entire station SCD file is configured, the SCD file is subjected to privatization configuration and then is unloaded into a total-interval sub-machine; associated configuration information of all untransformed intervals required for a digitalized bus difference is modified to be completely transmitted by the total-interval sub-machine; meanwhile, a virtual terminal of requiring conventional tripping operation in digitalized bus difference GOOSE tripping information is associated into the total-interval sub-machine for opening; and a fiber connecting line only needs to be modified to be connected to an intelligent terminal and a merging unit (MU) corresponding to the terminal by the total-interval sub-machine when each interval is transformed each time, so that seamless switching of the total-interval sub-machine is achieved; and the digitalized transformation method has the technical effects of small boundedness, high operability, safety, reliability, simplicity in construction and high transformation efficiency.

Description

Technical field [0001] The invention relates to the technical field of substation transformation, in particular to a method for digital transformation of a substation. Background technique [0002] In the process of transforming conventional substations into digital intelligent stations, how to smoothly transition from conventional substations currently in operation to digital substations is a practical issue related to whether digital substations can be quickly promoted. In the existing digital substation renovation project, the operating equipment can only be shut down at intervals, the equipment across the interval cannot be withdrawn from operation for a long time, and the SCD configuration file cannot be modified frequently; and the busbar protection device is due to the multiple access branches, diverse operation modes and The transformation is complicated. There are many problems in the process of transforming the original busbar protection device into a digital busbar pro...

AI Technical Summary

Problems solved by technology

In the existing digital substation renovation project, the operating equipment can only be shut down at intervals, the equipment across intervals cannot be out of operation for a long time, and the SCD configuration file cannot be frequently modified; and the busbar protection device has many access branches and various operating modes. The transformation is complicated. There are many problems in the transformation of the original busbar protection device into a digital busbar protection device. How to solve the problem of connecting conventional equipment and digital process layer equipment at the same time during the transformation process, and how to seamlessly connect the digital process layer equipment after the transformation of conventional equipment Access to digital bus protection is the most critical issue in the process of digital transformation of substations

[0003] However, the solution for connecting the process layer equipment to the busbar protection during the transformation of the existing busbar protection device adopts the busbar differential wiring scheme or the transition interface device scheme during the split busbar transformation and single bay transformation. Considering that there are some problems in the above schemes

The reconstruction of divided busbars requires the busbars to run separately for a long time. At the same time, the load of the whole station in the early stage of the transformation is concentrated on one busbar, and the operation mode is single. The failure of the operating busbar will lead to the expansion of the blackout area and greatly reduce the reliability of the system. In addition, the reconstruction plan has limitations. It has high requirements on the primary wiring mode of the power grid, and is not suitable for all main wiring modes

The bus differential wiring scheme is retained during the single-bay transformation, and the single-bay protection must have the function of accepting both digital and analog quantities. Changes, the construction process is more complicated, and the follow-up workload of the operation interval after the transformation is large, which increases safety risks and power outages during the transformation process, and reduces work efficiency at the same time

The transition interface device solution only supports GOOSE digital transformation, and at the same time, the transition interface device must be reconnected with a large number of input and output cables, which also has limitations

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