PLC實現自動重合閘裝置的設計

電氣自動化論文編號:ZD163     S7-200 PLC   論文字數:27235,頁數:52

目  錄
摘  要 I
Abstract II
1 緒 論 1
1. 1 自動重合閘的概述 1
1.1.1 自動重合閘的定義 1
1.1.2自動重合閘的基本概念 2
1.1.3 自動重合閘的構成和原理 4
1.2 本文的主要研究內容 5
1.3 可編程控制器概況 8
1.3.1 PLC的基本概念 8
1.3.2 PLC的國內外狀況 15
1.3.3 PLC的發展趨勢 16
2 PLC實現自動重合閘試驗裝置設計 19
2.1 PLC自動重合閘系統概述 19
2.2系統的核心—PLC的選型與設計 19
2.2.1 S7-200的概況 20
2.2.2 S7-200的軟件編程 28
2.3 本設計硬件設計 31
2.3.1 I/O地址分配表 31
2.3.2 PLC硬件接線圖 31
2.3.3二次控制回路接線 32
總  結 34
致  謝 35
參考文獻 36
附  錄:控制程序代碼 37
附錄A　外文翻譯 39

摘  要

據統計，系統中永久性故障一般不到10%，其余故障都是由于雷擊過電壓引起的絕緣子表面閃絡，大風時的短時碰線，樹枝落在導線上等引起的瞬時故障。當系統出現故障時，保護立刻動作是線路或設備斷電，在非常短暫的時間內，故障點的電弧就會自動熄滅，是絕緣得以恢復。此時自動重合閘裝置動作，自動將斷路器合上，恢復系統正常運行。
針對傳統的電磁式重合閘裝置存在動作級數多、觸點粘連等不可靠因素,采用PLC實現自動重合閘,對其進行硬件設計和軟件編程,所用元件極少,故障率大大降低,克服了電磁式重合閘控制方式的不足。控制柔性好,控制系統的供電可靠性高。分析了傳統繼電器式自動重合閘裝置存在的缺點，提出利用PLC 設計自動重合閘裝置，繪出梯形圖。

關鍵詞: 可編程邏輯控制器; 自動重合閘; 可靠性; PLC; 應用
Abstract
According to statistics, permanent fault in the system generally less than 10 per cent and the rest were due to failures caused by lightning over-voltage insulator surface flashover, when the winds of short-term touch lines, tree branches fell from the upper wire transient fault. When the system failure, immediate action to protect the power lines or equipment, in a very short time, the point of failure will automatically extinguish the arc, is insulated to resume. At this point automatically reclosing device moves automatically close the circuit breaker and restore normal operation system.
Aiming at the unreliable factors that the traditional electromagnetic ARD device has more actiongrades and adhering of contact, using PLC to realize the auto-reclosure andmaking the design for hardware and soft-ware, the used components is fewer, accident chance ismuch lower. The method overcomes the defects of the traditional electromagnetic ARD control method. So control flexibility is strong and the reliability of power-supply of control system is high. The artica Analyses the defects in traditional relay automatic reclosing, proposes application of PLC in the design automatic relcosing and draws a ladder chart.

Key words: pragramable log ic con troller ( PLC) ; auto-reclosure; reliab ility; application