Intelligent substation secondary loop comprehensive performance test system and working method thereof

Abstract

The invention provides an intelligent substation secondary loop comprehensive performance test system and a working method thereof. The transmission delay of a secondary loop of an intelligent substation is mainly composed of several parts: sampling signal pre-processing delay of an electronic transformer, processing delay of an integrator, synchronous operation and data processing operation delayof a merging unit and transmission delay of a switching network and the like. The invention designs a high-precision timing synchronization implementation method, hardware design of a message acquisition module, a switch value acquisition module and a control system for the intelligent substation secondary loop comprehensive performance test. The system realizes accurate test of intelligent substation secondary loop comprehensive performance and provides technical support for asynchronous error check of the electronic transformer.

Description

technical field [0001] The invention relates to the field of electronic circuit control, in particular to a comprehensive performance testing system and working method of a secondary circuit of an intelligent substation. Background technique [0002] The secondary system of smart substation is composed of smart components, mainly including protection devices, measurement and control devices, smart terminals and merging units, etc. Its main features are digital data collection and networked information interaction. These technological changes will inevitably have an impact on the comprehensive performance of the secondary circuit of the smart substation. For example, the tripping delay of the quick-break protection is longer than that of the traditional substation, and the instability of the synchronization device may cause the line / transformer differential protection to malfunction. The reasons for the impact are mainly reflected in the following aspects: [0003] (1) The ...

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Problems solved by technology

It should be emphasized that although the use of switching technology improves the delay determinism of Ethernet communication to a certain extent, it cannot meet the requirements of the most demanding applications in smart substations.

Especially when the power grid fails or the scale of the system expands, if the demand for a certain resource (such as buffer, bandwidth, and processing capacity) in the network exceeds the available part that the resource can provide, the message will arrive overtime, or even report an error. The file is lost, and the determinism of the delay cannot be guaranteed

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