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Method for realizing large-capacity sequence-of-event (SOE) record based on program logic controller (PLC) device

A technology for event recording and hydropower stations, which is applied in the direction of program control and electrical program control in sequence/logic controllers, can solve the problems of limited recording objects, high resolution, high cost, etc., and achieve large-scale effects

Active Publication Date: 2013-05-01
TIANSHENGQIAO TWO HYDROPOWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain millisecond-level resolution, SOE needs special hardware support. Each manufacturer provides a special SOE input module. The advantage is that the resolution is high, and the resolution of 1ms can be achieved. Record the signal points connected to the SOE input module

Method used

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  • Method for realizing large-capacity sequence-of-event (SOE) record based on program logic controller (PLC) device
  • Method for realizing large-capacity sequence-of-event (SOE) record based on program logic controller (PLC) device
  • Method for realizing large-capacity sequence-of-event (SOE) record based on program logic controller (PLC) device

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Embodiment Construction

[0020] The technical solution of the present application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 2 Shown is the flowchart of the method for recording large-capacity sequential time based on the PLC device disclosed in the present application. The method for recording large-capacity sequential time based on the PLC device disclosed in the present application includes the following steps:

[0022] (1) Install the Siemens S7-300 PLC device in the lower computer system of the hydropower station, the PLC device is connected to each slave station, and communicates with the upper computer through industrial Ethernet;

[0023] Such as figure 1 As shown, the PLC device is installed in the lower computer, including PLC power supply, CPU, and Ethernet module. The CPU is connected to the slave station through a data line to measure SOE measurement point data. The PLC device communicates wi...

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Abstract

The invention relates to a method for realizing large-capacity sequence-of-event (SOE) record based on a program logic controller (PLC) device, and the method is characterized in that a large-capacity SOE function of a large-sized hydropower station can be realized through a program software function of the PLC device. The invention relates to a method for realizing the SOE function based on the PLC device, and the method is free from depending on a hardware SOE recording module, has the advantages that the real wiring is less, the cost is low, stability and reliability in running can be realized, the switching-value SOE data can be processed in large capacity, the analog-quantity SOE is supported, and the expandability is strong and is applicable to other automatic systems.

Description

technical field [0001] The application belongs to the technical field of power system automation, and specifically relates to a large-capacity SOE (sequential event) recording method for a large-scale hydropower station. Background technique [0002] SOE (Sequence of Events Recording) can obtain event information with millisecond-level resolution, which can more accurately reflect the event situation and provide strong evidence for accident analysis. The input signals of the SOE system are all switching signals. It distinguishes the order of the state changes of each signal with high resolution, and helps to distinguish the cause of the fault and find out the first fault in the event of an accident. Therefore, SOE has become the main recording method for analyzing accidents. In order to obtain millisecond-level resolution, SOE needs special hardware support. Each manufacturer provides a special SOE input module. The advantage is that the resolution is high, and the resolutio...

Claims

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Application Information

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IPC IPC(8): G05B19/05
Inventor 柳本林张芳明罗勇杨虎
Owner TIANSHENGQIAO TWO HYDROPOWER CO LTD
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