多级船闸自动控制系统研究

On automatic control system for a multi-step shiplock

三峡工程永久通航措施采用双线连续五级船闸方案。其运行方式是：一般情况采用单向过闸，即一线上行，另一线下行，异常情况则要求任一线均能迎向运行。运行自动化设计由后者控制：双线迎向过闸。本研究控制系统采用分布式二层控制系统──将多级船闸分成三部分，每部分相当于三个单级船闸。每部分由一台可编程序控制器对两对人字门和两对充泄水阀门进行集中联接。人字门和充泄水阀门的现地控制采用小型可编程序控制器。每部分的集中控制可编程序控制器对每部分船闸进行集中控制如同单级船闸的集中控制一样，另外还具有补水判断和上、下行过闸控制和连续过闸控制等功能。上述从理论上建立的控制系统方案，已在应用微机实际制作的船闸控制系统模型上进行了验论。验证结果表明，该控制系统具有可靠性高、系统扩充方式灵活等优点。

The double-line successive five-step shiplocks will be used as the permanent navigation structures at Three Gorges project. The operation mode is that under normal conditions, ships pass each line of the shiplocks by only one single direction, namely the ships in one line run upwards and those in another line run downwards ; under unusual conditions, on either of the double line ships can sail two-way, some run upwards, and others downwards. The design of automatic control system is governed by the latter. This paper presents a two level distribution system──the multi─stepshiplock is divided into three parts, of which each part represents three single─step shiplocks──and the whole is used as the control system. In each part, a programmable controller is connected with two pairs of miter gates and two pairs of filling/emptying valves for their centralized control. Small sire programmable controllers are used for the miter gates and filling/emptying valves controllins in situ. The programmable controller in each part centrally controls the shiplocks like centrally controlling a signle shiplock. Moreover, the programmable controller has also functions of water supplement judgement, controlling of upstream/downstream ships passing the shiplock, and controlling of ships successively passing the shiplock, etc. This theoretically established control system has been verified on control system model formed by microcomputers. Verification shows that this control system has advantages of high reliability and .flexibility for mode of system expansion.