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Sampling data storage method and system for high-speed transient protection
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of sampling data and high-speed sampling, which is used in electrical digital data processing, input/output process of data processing, instruments, etc. It can solve the problem that the CPU cannot process high-speed sampling data quickly, and achieve the effect of meeting the requirements of rapidity
Active Publication Date: 2021-10-22
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +4
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[0005] The present invention provides a sampling data storage method for high-speed transient protection, which provides guarantee measures for the action speed of high-speed transient protection, so as to solve the problem that the existing transient protection CPU cannot quickly process high-speed sampling data and perform logical discrimination problem, to meet the quick action requirements of high-speed transient protection action time
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Embodiment 1
[0024] This embodiment provides a sampling data storage method for high-speed transient protection, such as figure 1 shown, including the following steps:
[0025] Step 1: When the transient protection device is in normal operation, the FPGA controls the AD to sample at a high speed with a sampling frequency of 1.2MHz, and records the sampling time of each sampled data.
[0026] Step 2: FPGA performs snapshot buffering of high-speed sampling data at 4kHz, and stores time scale information of sampling data at the same time; FPGA internally sets two circular buffers, one for storing high-speed sampling data and one for storing sampling after sampling data.
[0027] Step 3: FPGA judges whether the data in the low-speed sampling buffer is started; if it is started, then address the high-speed sampling data according to the time stamp information of the starting point, and after finding the data, send the high-speed sampling data corresponding to 3ms before starting and 2ms after ...
Embodiment 2
[0030] This embodiment provides a sampling data storage system for high-speed transient protection, such as figure 2 shown, including:
[0031] Data sampling time recording unit: When the transient protection device is in normal operation, FPGA controls AD high-speed sampling with a sampling frequency of 1.2MHz, and records the sampling time of each sampling data.
[0032] Sampling data time stamp information storage unit: FPGA caches the high-speed sampling data according to 4kHz, and stores the time stamp information of the sampling data at the same time; there are two circular buffers inside the FPGA, one for storing high-speed sampling data and one for storing Sampled data after sampling.
[0033] Low-speed sampling buffer data start judging unit: FPGA judges whether the low-speed sampling buffer data is started.
[0034] High-speed sampling data sending unit: If the low-speed sampling buffer data is started, then address the high-speed sampling data according to the ti...
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Abstract
The invention discloses a sampling data storage method and system for high-speed transient quantity protection. The existing transient quantity protection has the problem that the CPU cannot quickly process high-speed sampling data and make logical judgments. The technical solution adopted by the present invention includes: when the transient quantity protection device is in normal operation, the FPGA controls the high-speed sampling of the AD, and records the sampling time of each sampling data; mark information; FPGA judges whether the data in the low-speed sampling buffer is started, if it is started, then addresses the high-speed sampling data according to the time mark information of the start point, and after finding the data, sends the high-speed sampling data corresponding to 3ms before start and 2ms after start To protect the CPU; the protection CPU opens up multiple calculation buffers to store the fault data sent by the FPGA respectively. The invention solves the problem that the existing transient quantity protection CPU cannot quickly process high-speed sampling data for logical judgment, and meets the quickness requirement of the high-speed transient quantity protection action time.
Description
technical field [0001] The invention belongs to the technical field of electric powersystemrelay protection, in particular to a sampling data storage method and system for high-speed transient protection. Background technique [0002] High-speed transient protection is a relay protection device based on detecting high-frequency transients generated by faults. When the power system fails, additional transient components will be generated. These fault components contain rich fault information and are distributed from In the wide spectrum range from DC component to high frequency component, and the high frequency component contains more fault information than the power frequency component, the transient quantity protection obtains the transient signal when the power system fails by increasing the sampling frequency of the device. And use the information of these transient time domains and frequency domains to quickly complete the identification of faults. [0003] The sampli...
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