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微机测控装置硬件新方案的研究与设计
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摘要
测控装置是变电站综合自动化系统间隔层的核心装置。随着电网
    容量的日益扩大,原有的测控装置在可靠性、实时性、准确性上还
    不能满足电网调度自动化对远动系统的基本要求。因此本文在研究、
    分析了国内外保护和测控硬件平台的基础上,提出了一种新的测控
    装置硬件方案,并参与研制了新型的测控装置。
     为了提高装置的可靠性,本文将CAN总线引入到测控装置,增
    强了装置的抗干扰能力;为了提高装置的实时性,在装置内设立了
    MASTER主站,专门负责通讯,MASTER插件的CPU带有嵌入式
    以太网接口,可以方便地接入以太网;为了提高装置的准确性,将
    14位逐次逼近型ADC代替VFC构成新的数据采集系统;为了提高
    装置的灵活性,装置在设计中采用大量可配置信息;此外新型测控
    装置在人机接口插件上采用了大液晶显示器,真正做到“图文并茂”,
    使人机界面更加友好。新型测控装置在完成四遥等基本功能外,还
    充分利用自身采集到的信息集成了一些新的功能。
     通过对样机的试验表明,新的测控装置的各项指标都达到了预期
    的设计要求。
ABSTRACT
     The measurement and control device is one kernel part in the bay of substation automation system. With the capability of electrical system increasing, the former device can not yet satisfy?what the dispatching automation asks for the remote terminal unit on reliability, rapidity and accuracy. Based on researching and analyzing of the existed hardware platform project of domestic and overseas protection and measurement and control device, the thesis has put forward a new project and developed a new type device.
     To improve the reliability, the CAN bus has been adopted to improve the ability of anti-jamming. To improve the rapidity, a central manager has been designed specially for communication. With embedded Ethernet network interface, the device can be easily linked with the Ethernet network. To improve the accuracy, a 14-bit successive-approximation analog-to-digital converter (ADC) has been adopted instead of voltage-tofrequency converter (VFC) to compose the data acquisition system. To improve the flexibility, a great deal configured information has been used. Furthermore, the new big Liquid Crystal Display (LCD), which is able to display both character and graph, makes the man-machine interface friendlier. To make full use of information acquired, the new type device performs some new functions except basic functions such as remote measurement, remote signal, remote control and remote regulation.
     It is indicated that all targets come true as expected after having tested on the device.
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