The field test instrument of the hottest Yokogawa

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Yokogawa Electric's field test instruments provide Nam with leading automatic control support. Groningen gas field of

nam was put into production in 1959. A variety of small-scale upgrades have delayed large-scale upgrades. But before 2010, uncontrolled mining may be cancelled. In order to ensure the right to use the remaining reserves and continue to be a producer, Nam's GLT project implements the policy of reducing losses. As part of the phase I 11 gas field contract, the first gas field installed compressors in 1998. In order to ensure that the gas field can continue to produce for 40 years, all 29 gas fields will be upgraded

nam has developed a detailed functional description for GLT and put forward requirements for each part of the work, including engineering design, engineering construction, centrifugal compressor supply, internationally speaking compressor drive (including electric motor drive and gas turbine drive) and parameter measurement/automation. Qualified suppliers should form a team. Yokogawa electric started a design competition with a few competitors in the team. Nam's evaluation standard is not how passionate or artistic the design is, but whether it can reduce the total operating cost. The winner was stork GLT, which established a permanent office in Groningen province. In stork GLT, Yokogawa Electric Machinery Co., Ltd. is the supplier of main equipment, providing required measuring instruments and automatic control systems, including field instruments, control systems, ultrasonic measurement systems, safety systems, transmission and distribution control systems (DCSs) and plant information management systems (PIMS)

stork GLT is responsible for implementing the improvement of the project and the maintenance of the gas field mouth. Yokogawa Electric's scope of work includes commissioning, startup and maintenance of all test systems

interference minimization

nam operation is based on the concept of interference minimization, which means eyes on, hands off. Nam only works in the day shift, and the remote production operation is fully automatic. The instrument cluster can be started from the cold standby state without alarm within 60 minutes. Under the general operating conditions of changing production capacity, the operation must be stable without alarm. Routine operation and maintenance must also be fully automatic to minimize the task of on-site monitoring. Similarly, the compression equipment also requires a high degree of operational flexibility. It can not only carry out remote diagnosis, but also carry out combined monitoring experiments and independent experimental observation. For example, if something happens in a production process at night, relevant personnel will receive an alarm at home. With only one PC and ISDN line, operators can log in to the field control network to solve problems remotely

distributed network

29 Groningen gas well clusters (with an average of about 10 well sources), each of which has about 25000 i/os. The whole site needs about 640000 i/os, which are controlled by 25 networks and 460 workstations. In order to meet the needs of this huge system, Yokogawa electric must increase the capacity of its CENTUM integrated control system. This performance was called the standard performance of CENTUM system in 2004. It can handle onemillion i/os, 512 workstations and 31 networks. The project is developed based on modern technology, which has been proved by field practice. This means that while ensuring the normal operation of the system, there must be technical changes in the whole project cycle. The local control system of the production gas well cluster is based on CENTUM components, Yokogawa Electric's ProSafe safety system, exaquantum, plant information management system (PIMS) and equipment. There are CENTUM equipment and PIMS equipment all over the site in the axis change workstation of the photoelectric encoder driven by people on duty all year round. These systems are connected by tcp/ip protocol for safe data communication, so as to realize unattended operation of the gas well group

in order to reduce system operation cost and improve efficiency, Nam enables each device to give full play to CENTUM's local or remote i/o combination capability. The CENTUM system uses the local i/o system to control most of the equipment. At the same time, it can reach the remote equipment 5km away. When these equipment conduct the long sample tensile test, they use the intelligent remote i/o unit to communicate with the CENTUM system on other equipment, mainly through CENTUM, which is based on the Ethernet FIO bus. In the central control room located in the center, any equipment can be started, stopped, etc. without the need for operators to carry out on-site operations. All production tasks can be carried out in this way. The central control room also runs exaquantum PIMS, which can continuously monitor the operation status of the entire production operation for a long time

the huge scale of the entire Groningen gas field indicates that the system upgrade will continue for a long time. At first, seamless and compatible technological changes are required to realize the communication connection with field devices. The first equipment is updated by using traditional communication means; Later devices installed the foundation fieldbus interface. This additional performance enables Nam to perform problem analysis, long-term analysis and maintenance based on site conditions through the plant resource management (PRM) system

from a wider range of concerns

in addition to being the largest DCS network in the world, Nam also establishes closer ties between enterprise employees and enhances their goal awareness through the use of control systems. In GLT headquarters, Nam has set up some human-computer interface stations (his) next to the coffee machine, which can display the production status of GLT site. So this becomes the key connecting factor of the organizational structure: expert opinions can be provided to the site in the office, and the management can also obtain direct feedback from the site. This experience had a very positive impact on Nam, and Ruurd Hoekstra, director of Nam's control and automation department, suggested that this idea be applied to all similar factories because it brought the office closer to the site

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