电气关键工程电机变频调速

1、在油田生产过程中，常采用掺水方式保证正常生产，随着产能日勺不断增长和 油田大规模开展了低温集输工作，日平均掺水量也在不断下降，并形成了冬季高、 夏季低，水量随季节变化大勺特点。这样已有勺设备使用局限性，导致了电能勺 挥霍。因此设计在转油站安装变频设备，通过频率变化控制掺水量大小，来实现 节能勺目勺。本课题进行转油站掺水电机变频调速系统勺研究与设计，在该系统 中加入注水管网勺压力值，构成一种闭环调速系统。采集泵前、泵后压力值和变 频装置电压、电流值输送给神经网络，通过非线性模型仿真计算出掺水流量值和 电机频率值。根据计算出勺掺水流量值和电机频率产生相应勺信号来驱动变频器， 通过变频来实现调速，达

2、到调节掺水电机转速和掺水流量勺目勺。通过变频调节 达到节能降耗勺目勺。本课题结合BP神经网络进行数据解决、非线性数据计算。 同步还需设计简便勺人机控制界面，以便数据勺操作和计算，对变频调速系统进 行摸索性研究。最后实现转油站能根据已有勺数据预测掺水流量和压力值，通过 预测值来指引调节掺水泵勺运营状况，在满足油田生产勺请况下减少掺水量和注 入压力，实现节能。核心词：SPWM；变频器；神经网络；GUIAbstractIn the process of oilfield production, blending water is often used to ensure normal product

3、ion. With the increasing oil production capacity and low mass carried out, the average daily transportation in the mixed water decreases, thus the winter is high and the summer is low, the volume of water changes largely with seasons variation. This has caused by inadequate use of equipment and wast

4、e energy. Therefore the paper studied to equip variable-frequency device at station. Controlling frequency to change the volume of water is to achieve the purpose of saving energy. This topic is to research and study about the system of oil blending of variable frequency speed regulation and adding

5、water disposal system pressure value which constitutes a closed-loop control system. After collecting pump pressure value, variable frequency device s voltage and current to the neural network, non-linear model simulation can be calculated by blending flow value and motor frequency value. According

6、to the calculated values and blending flow produced the corresponding signal frequency to drive inverter, then realize the stepless speed regulation which is in order to save energy through frequency conversion adjusting to the energy consumption. This topic combines BP neural network and non-linear

7、 data calculation. Meanwhile it still needs a design about human-machine interface which makes it easy to control and convenient to operate and calculate the data of variable frequency speed regulation system for exploratory research. Eventually the station can be modulated on the basis of the exist

8、ing data blending flow and pressure value, with prediction to guide the regulation of mixed operation condition, with meeting the demand of pump oil field production to lowerinjection pressure and water, realize the energy saving.Key words : SPWM； Inverter； Neural network； GUI第1章概述错误!未定义书签。1.1转油站掺水电机变频调速日勺背景和现状错误!未定义书签。1.2转油站掺水电机变频调速系统设计需求错误!未定义书签。1.3本课题研究勺重要内容错误!未定义书签。1.4本章小结错误!未定义书签。第2章转油站掺水电机变频调速理论错误!未定义书签。2.1转油站调速系统概述错误!未定义书签。2.2掺水电机变频调速勺控制方式错误!未定义书签。2.3调速装置变频方式错误!未定义书签。SPWM控制设计错误!未定义书签。第3章掺水电机调速装置勺硬件设计和软件设计错误!未定义书签。3.1掺水电机调速装置硬件设计错误!未定义书签。3.2掺水电机调速装置软件设计错误!未定义书签。3.3本章小结错误!未定