Multi-purpose intelligent transformer substation high-speed sampling method and device

Abstract

The invention discloses a multi-purpose intelligent transformer substation high-speed sampling method. The multi-purpose intelligent transformer substation high-speed sampling method comprises the following steps of FPGA high-speed data acquisition, FPGA low-pass filtering, FPGA linear interpolation, FPGA data push and DSP application sampling data. The invention further discloses a multi-purposeintelligent transformer substation high-speed sampling device. Compared with the prior art, the scheme of the multi-purpose intelligent transformer substation high-speed sampling method and device realizes that data are acquired from FPGA in a high-speed mode, filtering and interpolation processing of the data of various applications are completed according to sampling rates and low-pass coefficients set by different applications, data requirements of protection, measurement and control, merging units and fault recorders can be met, the DSP load rate is low, the expandability is high, a methodfor multiplexing sampled data is provided for integration of multifunctional equipment of intelligent transformer substations, and the application prospect is good.

Description

technical field [0001] The invention relates to the field of intelligent substations in power systems, in particular to a multi-purpose high-speed sampling method and device for intelligent substations. Background technique [0002] Smart substation adopts digital communication method, which greatly improves the data sharing ability and indirectly promotes the integration of devices. From the early discrete arrangement of protection, measurement and control, to the integrated protection and measurement device, to the later station area protection device, and all-in-one device, the integration degree of the device is getting higher and higher, and the degree of data sharing is getting bigger and bigger. [0003] An article "Study on the Integration of All-in-One Devices for 110 (66) kV System of Smart Substations" in the Journal of State Grid Institute of Technology in Volume 2 of 2016 mentioned that an integrated protection, measurement and control, non-gateway metering, mer...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a multi-purpose intelligent substation high-speed sampling in order to solve the problem that the demand for multiple sampling rates cannot be realized by the same set of hardware and different sampling boards need to be configured to achieve different sampling rates and low-pass cut-off frequencies. The method adopts the unified high-speed data acquisition of FPGA, applies different filtering algorithms, and interpolates into different sampling frequencies, which can meet the requirements of different sampling rates and different cut-off frequencies of various applications.

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