Relay protection synchronization performance testing system and method based on random discrete time domain

Abstract

The invention discloses a relay protection synchronization performance testing system based on random discrete time domain. The relay protection synchronization performance testing system comprises an upper computer and a testing host, wherein the testing host comprises a CPU (Central Processing Unit), a data generating module and a plurality of random data sending modules, wherein the upper computer, the CPU and the data generating module are sequentially connected, the data generating module is connected with the random data sending modules, the random sending modules are connected with measured interval-crossing protection equipment, the data generating module comprises a first crystal oscillator, an FPGA (Field Programmable Gate Array) and a multichannel data sending module, the first crystal oscillator, the FPGA and the multichannel data sending unit are sequentially connected, and the random data sending modules comprise data sending units, receiving units and second crystal oscillators. According to the relay protection synchronization performance testing system disclosed by the invention, randomness and discreteness on an output time domain of a merging unit are actually realized by adopting a multi-crystal oscillator system, and the multi-crystal oscillator system comprises crystal oscillators of the data generating module and crystal oscillators of the random data sending modules.

Description

technical field [0001] The invention belongs to the field of digital relay protection detection of intelligent substations in power systems, and relates to a cross-interval synchronous testing system for digital relay protection of intelligent substations. Background technique [0002] With the extensive application of electronic transformers and merging units, digital relay protection has replaced traditional relay protection equipment and become the mainstream product in the market. At present, the point-to-point sampling technology commonly used in high-voltage digital relay protection requires relay protection devices to be able to Adapt to the sampling value output of the merging unit with different time characteristics. [0003] At present, most of the digital relay protection test equipment at home and abroad are based on the virtual data output of the upper computer, and then the test equipment converts these virtual data into the sampling value messages required by ...

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Problems solved by technology

[0006] Purpose of the invention: The present invention is to solve the test requirements of intelligent substations and digital substations for the inter-interval synchronization capability of digital relay protection, and to develop a digital substation based on random discrete time domain control for the existing inter-interval digital relay protection technology. Relay protection synchronization performance test system to meet the requirements of power system users for the cross-interval synchronization performance test of digital relay protection in smart substations

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