压缩机预选启动与负荷分配自动控制设计开发

长输天然气管道压缩机多机启动时,单靠人工完成一系列操作,耗时时间长,检查判断不准确,多机并行运行能耗较大;为了提高压缩机多机启动效率和启机一次成功率,自动识别启机不满足项,快速投用负荷分配使机组做功效率最大化;利用数据采集与监视控制(SCADA)系统,对多台压缩机设定启动优先级、启动台数和负荷分配自动控制,优化逻辑控制器(PLC)与压缩机组控制系统(UCS)通信;创新实现了多机组一键顺序启机和启机后多机组负荷分配自动并网;经实际应用满足了中俄东线天然气管道黑河首站4台压缩机多机启动要求,降低了人力和能耗,提高了生产运行效率;为多行业多种输送介质的大型机械设备联合自动控制提供了丰富的参考价值,对UCS与SCADA的控制整合具有一定的指导意义.

Design and development of compressor pre selection start and load distribution automatic controlZhu Tong1,Dong Fei2,Liu Yuan1,Dong Qiong1,Chen Wanqiu3

When the multiple compressors of long-distance natural gas pipeline will be started, a series of operations are completed manually, which takes a long time, and the inspection and judgment are not accurate, and the energy consumption of parallel operation of multiple units is large. In order to improve the efficiency of multi unit start-up and the success rate of one-time start-up of compressor, automatically identify the unsatisfied items of start-up, and quickly put load distribution into operation, so as to maximize the work efficiency of the unit. Using data acquisition and monitoring control(SCADA) system, setting the automatic control of starting priority, starting number and load distribution of multiple compressors, and the communication between logic controller(PLC) and compressor unit control system(UCS) is optimized. It innovates and realizes the sequential start-up of multiple units with one key and automatic grid connection of load distribution of multiple units after start-up. Through practical application, it meets the requirements of multi unit start-up of four compressors in Heihe initial station of China Russia east gas pipeline, reduces manpower and energy consumption, and improves production and operation efficiency. It provides a rich reference value for the joint automatic control of large mechanical equipment in many industries and transport media, and has a certain guiding significance for the control integration of UCS and SCADA.