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Measurement-control device and method of intelligent transformer station with accurate calculation of CPU utilization rate

A technology of intelligent substation and measurement and control device, applied in the field of intelligent substation, can solve the problems of analyzing the running state of the measurement and control device, unable to pass the CPU usage rate, etc., to achieve the effects of accurate calculation, strong practicability, and simple construction

Inactive Publication Date: 2015-07-29
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
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Problems solved by technology

Since it cannot provide accurate calculation results for the CPU usage, it is impossible to analyze the running status of the measurement and control device through the CPU usage

Method used

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  • Measurement-control device and method of intelligent transformer station with accurate calculation of CPU utilization rate
  • Measurement-control device and method of intelligent transformer station with accurate calculation of CPU utilization rate
  • Measurement-control device and method of intelligent transformer station with accurate calculation of CPU utilization rate

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0035] An intelligent substation measurement and control device with accurate calculation of CPU usage, including a central processing unit (CPU), the CPU adopts S3C2410 (ARM9) of Samsung Group, the first data storage terminal of the CPU and a 16M×16-bit synchronous dynamic random access memory SDRAM The data storage end connection, the starting address is 0x0C000000, and the external 4M×16-bit BIT SDRAM storage medium, the starting address is 0x0, is used to store the operating system and application system, the second data storage end of the CPU and the 8M flash memory FLASH connected to the data storage terminal of the CPU, the clock terminal of the CPU is connected to the clock terminal of the clock circuit; the signal terminal of the LCD panel of the CPU is connected to the signal terminal of a 4-inch 320×240 thin fil...

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Abstract

The invention discloses a measurement-control device and method of an intelligent transformer station with accurate calculation of the CPU utilization rate. The measurement-control device comprises a central processor, a liquid crystal display screen, buttons, a synchronous dynamic random access memory, a flash memory, a clock circuit, a network controller and a five-port switch chip. The device is characterized in that the counting end of a CPU is connected with the counting end of a programmable counter, and the CPU controls the programmable counter to carry out counting. The central processor can obtain the counting reference value C within N seconds (10>=N>=5) used for calculation of the CPU utilization rate as well as the counting values of different idle periods of the system within N seconds and a C set, and the CPU utilization rate is calculated by the formula: CPU utilization rate=1-C set / C reference. The programmable counter can accurately calculate the CPU utilization rate of the measurement-control device, and the disadvantage that data of the CPU utilization rate cannot be provided when VxWorks operating system of the measurement-control device is created, and the CPU utilization rate cannot be accurately calculated in a pure-software method are overcome.

Description

technical field [0001] The invention relates to an intelligent substation, in particular to an intelligent substation measurement and control device and a measurement and control method based on a VxWorks operating system and capable of accurately calculating CPU usage. Background technique [0002] The measurement and control device is an important secondary equipment for data collection in substations. Whether its operating status is normal or not is related to the safety of power production. Wherein, the CPU utilization rate of the process task of the measurement and control device is an important parameter for analyzing the running state of the measurement and control device. [0003] For the intelligent substation measurement and control device built on the VxWorks operating system, due to the characteristics of VxWorks single process and multitasking, the VxWorks operating system itself cannot provide the CPU usage calculation results of process tasks like Windows or U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
Inventor 周铀刘宇汪建敏陈裕云李俊周迪蔡明何强勇程宇钟文慧肖齐周小兵周盛孙扬吴颖姚文昊黎强
Owner STATE GRID CORP OF CHINA
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