【作者】 李英；

【导师】 李元春；

【作者基本信息】 吉林大学 ， 控制理论与控制工程， 2004， 硕士

【摘要】 油田采油控制系统主要是用来测量油田液面高度并进行智能采油的系统。我国油田地质状况决定了部分油井在经过一段时间的开采后就会出现抽空现象，但电机仍在日夜不停的工作，这就造成电机大马拉小车现象，耗电量高，在节约能源方面造成了巨大的难题，所以该系统不仅可以满足油田采油智能控制的需要。同时，为新型采油控制系统的研制、开发和生产提供了有效的设计方案。本系统可以根据用户的要求设计各种量程的采油控制系统。在本课题中设计的电机额定电流为50A。该类系统在国内的研究处于领先地位，因此在系统设计、设备的工艺结构设计、设备安装、VEGA测控软件开发等方面需要许多理论和技术上的创新。本文根据实际工程背景，针对油田采油控制系统的工作原理、方案论证、硬件设计、软件算法设计、测控软件开发平台以及工艺结构设计等关键问题进行了深入的研究和讨论。首先，按照系统提出的技术要求，依据高可靠性、高安全性、高效率、实用性强、操作方便的原则，合理设计了油田采油控制系统的总体结构，并阐述了油田采油控制系统的工作原理。其次，根据油田抽油机采油控制系统的工作特点和技术要求，对系统的硬件电路进行了深入细致的设计研究。然后，本文重点对油田采油控制系统的软件算法进行了深入研究。在<WP=79>系统建模方面深入的研究了常规BP算法、原始训练数据的初始化方法，为了克服常规BP算法存在收敛速度慢、容易陷入局部极小点等弊病研究了同伦及非线性同伦BP算法，最终设计了采用了非线性化规范原始数据，非线同伦算法对液面和电流、蓄油曲线、电流和时间曲线等进行建模；针对优化停机时间，深入研究了常规遗传算法。并且将以上的算法都进行了仿真研究，证明了所提出的算法的有效性，对油田采油控制系统的优化具有理论指导意义和实际应用价值。最后，本文对油田采油控制系统的外形、内部结构、设备的安装进行了设计，为系统的实施提高了强有力的保证；本文在最后还设计了计算机和控制系统间的可视化软件开发平台VEGA测控界面，给出了相应的控制功能，为系统的分析和论证奠定了基础。在本文中，我们通过软件开发平台可以深入分析研究实验数据，并对其进行了理论分析。论证了硬件方案和软件算法的高效性、准确性、实用性。上述的各种策略都是在硬件及VEGA软件的基础上实现的，最终建成了一个完整的油田采油控制系统，并达到了要求的技术指标。更多还原

【Abstract】 Oil extraction control system in the oil field is mainly used to measure the level of the oil underground and extract oil intelligently. According to the geology of oil field in our country, most of the oil well appears empty after exploitation for some time. But when this happens, the electromotor still works on all day and all night that results in the phenomenon of “a big horse hauling a small garage”. So it makes the difficulties in retrenching the energy sources because of the large amount of the power energy used. Overall this system in the dissertation is essential that it can not only meet with the need of intelligent oil extraction, also offer the effective plan of design for the research, development and production of the new-type oil extraction control system.This System can be designed in various scales, complying with the request of the user. It is concerned that in this dissertation the rating current of the electromotor is 50 Amperes. It is in the highest flight to set up such a system in China and is very significant to study on it. In order to build such a system, many theoretical and technological problems have to be solved in designing system, designing technics structure of the equipment, installing equipments, developing VEGA configuration and so on. Some of them are innovative work. Based on the practices in engineering, in this dissertation some key technological problems are deeply studied and discussed on the principle of the oil extraction control system, in demonstrating the scheme, designing the <WP=81>whole technics structures and hardware, designing software algorithms, and developing VEGA configuration for this system.First, considering the technological requirements of the system and based on the study and absorption of relative theories and technologies for the key problems, the whole structure of this system is designed to be satisfied with the requirements of high reliability, safety, efficiency, practicality and convenience operations and the principle of the control system is demonstrated.Secondly, considering the working characteristic of the control system for oil extraction and specific requirement, the research of the system’s hardware is carried on thoroughly and particularly. Then, in this dissertation the key research is focused greatly on the software algorithms. On the one hand the general BP neural network is adopted on the system modeling, based on which the normalization method of the original training data is studied, in order to resolve the problems of the tardy convergency velocity and easily getting into the local minimum, homotopic and nonlinear homotopic BP algorithm are done deeply. In the end, nonlinear homotopic algorithm including nonlinear normalization method to original samples is used to model the relation between height and current, current and time, and the curve of the oil cumulation. On the other hand, in order to optimize the outwork time of the electromotor, the general GA is researched thoroughly. At last the simulations to the all algorithms are studied, and the validity of the algorithms is proved. All referred above are significant and valuable to the theoretical guidance and application.Finally, the configuration, interior structure, and installation of the control system are designed, which offer an agressive potent to the actualization of the system. After that the visual interface of software developing platform named VEGA between control system and the computer is designed for the analysis and demonstration of the system, containing the corresponding control function. In the dissertation, developing platform may be used to analyze the experiment data and demonstrate the high efficiency, accuracy and practicality of the <WP=82>hardware, software algorithms scheme. The above methods are all realized depending on the hardware, software and VEGA platform. Ultimately, the oil extraction control system is successfully built, and the requirement of technology of the system is satisfied.更多还原