Talking about improving the reliability of thermal control protection system

Abstract: The information on improving the reliability of thermal control protection system is provided by excellent flowmeter and flowmeter manufacturers. With the development of large-scale and complex power generation equipment, the number of its failures also increases exponentially, which leads to a corresponding increase in the types and severity of failure consequences. In order to eliminate (or at least reduce) the consequences of failures, automatic protection is used extensively. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on improving the reliability of thermal control protection systems. With the development of large-scale and complex power generation equipment, the number of its failures also increases exponentially, which leads to a corresponding increase in the types and severity of failure consequences. In order to eliminate (or at least reduce) the consequences of failures, automatic protection devices are widely used, which function to: (1) attract the attention of the operator to the abnormal state (warning lights and alarms that react to the effects of the failure); (2) Once some failures that may cause serious consequences occur, stop the equipment; (3) eliminate or alleviate the abnormal state caused by the failure, otherwise it will cause more serious damage; (4) replace the failed Function; (5) Prevent dangerous situations in important positions. Therefore, the automatic protection device is a very important and indispensable component in the operation of the equipment, and its setting plays a very important role in improving the reliability, safety and economy of the equipment. However, the protection device is not the main functional part of the equipment, its task is only to take appropriate measures or protect the equipment in time when some faults that may cause serious consequences occur, so as to soften the fault, shut down for repair, and avoid the occurrence of major equipment. damage and casualties. That is to say, when there is no fault in the running equipment, the protection system is in a live ready state; when the running equipment fails, the protection system plays a role and is put into work. Therefore, the protection system has two states of working and ready when the equipment is running: the working state——When the equipment fails, the protection system operates normally and plays a protective role, which is called correct action; if the equipment fails, the protection system also fails and does not act, which is called cabinet movement. ready state——When the equipment is in normal operation, the protection system is in a live-ready state and is subject to a long-term power-on test. During this period, if the protection system itself malfunctions and causes the action, resulting in equipment shutdown, it is called a no-fault malfunction. The automatic protection system is set up to ensure that the failure consequences of the protected equipment are much lower than if no protection measures were taken. The presence of an automatic protection system often means that the maintenance requirements of the protected equipment are far less stringent than those without the protection system. Therefore, it must be noted that: (1) more attention should be paid to the routine maintenance of the protection system than the routine maintenance of the protected equipment; (2) it is impossible to reasonably consider the maintenance requirements of the protected equipment without considering the maintenance requirements of the protection system . To improve the reliability of the protection system, it is suggested that the control systems of modern power generation equipment not only mutually restrict each other, but also restrict each other. The failure of any link may send a signal to stop the normal operation through the automatic protection system, thereby causing unnecessary economic losses. If the failure causes casualties, it has safety consequences; if the failure results in a violation of industry, regional and national environmental standards, it has environmental consequences; therefore, many accidents caused by failures are There are safety and environmental consequences, and safety and environmental standards are rapidly increasing. Therefore, how to improve the reliability of the protection system is a very important and urgent task. 1 Keep the system as simple as possible under the premise of meeting the functional requirements.—a service life issue and the probability of occasional failure. Some components may last longer. Some may be shorter, some have a higher probability of failure, and some have a lower probability of failure. If the electrolytic capacitor is used for a period of time, it is easy to cause the internal electrolyte to dry up and fail, thus seriously affecting the reliable operation of the entire system. In a complex system, 5%—10% of the components are completely redundant, but when these components fail, it is still possible to interrupt the operation of the equipment. Removing these redundant components will not only reduce the maintenance volume and cost, but also lead to increased reliability. Therefore, on the premise of meeting the functional requirements of the system, it is necessary to keep the system as simple as possible, and unnecessary components and redundant complex structures can only increase the failure probability of the system. 2. Try to use mature and reliable technology and components Electronic components are the foundation of the control system. Without reliable components, no matter how perfect the design is, it is difficult for the system and equipment to achieve the predetermined goal. Therefore, it is necessary to use mature and reliable technologies and components as much as possible. Although some advanced features are sacrificed, reliability is guaranteed. For example, the United States left Earth to Mars in December 1996“rover”heart——The CPU is the 80C85 developed by Intel in the 1970s, not the Pentium series CPU that was popular at the time. Because the more complex and delicate circuit equipment is, the more sensitive it is to external interference, the stricter and more careful the preventive measures that need to be taken.

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