SCADA application of a water steam cycle of a thermal power plant

This paper focuses particularly to design a Ladder logic diagram a for monitoring qualities within a drinking water system. This system includes sensors & Electrical Interfaces to PLC (Programmable Logic Controller) for transmitting/receiving control and status data. The chosen water quality parameters , one is the physical quality parameter of a water is Turbidity which provides an inexpensive estimate of total suspended solids (NTU) concentration and one is chemical pH value which stands for "potential of Hydrogen". Exposure to extreme pH values results in irritation to the eyes, skin and mucous membrane and free chlorine CL concentration should be monitored to ensure that it is sufficient for its purpose .A program and a laboratory prototype were built to simulate the real water system. The research was compared with water and Environmental research center of MOST.

IFAC Proceedings Volumes, 2003

An automatic control and estimation strategy for wastewater treatment plants, particularly for Kayseri WWTP, will be introduced in this study. The main idea in this study is to develop and evaluate a control mechanism which can be applied practically to improve and protect the performance of the mentioned treatment plant. It has also been discussed for a proper solution for the reliability of the Kayseri WWTP. At this point, on-line automatic control systems seems as an effective method for this aim. Parameters that will be measured are as follows: flow rate, chemical oxygen demand (COD), conductivity, pH, suspended solids (SS) and toxicity. A damage will prevent the plant from operating for days or weeks. With such a system, shock loadings coming to WWTP will be monitored by the automatic control system. Highly polluted wastewater or shock loadings will be collected in a storage tank and then fed to the treatment plant at an optimal time.

TELKOMNIKA Telecommunication Computing Electronics and Control, 2025

Production processes in modern industry demand higher levels of quality and efficiency in their products. The "Hermanos Díaz" Oil Refinery Company of Santiago de Cuba, a fundamental pillar in the economic and social development of the eastern part of the country, has a chemical water treatment plant responsible for supplying processed water to the industry's boilers. The current state of this plant supports the lack of optimal physicalchemical conditions in the water it delivers and, therefore, the gradual deterioration of the boilers. This work conceives an automation solution for the dosing, precipitation, and clarification processes of the chemical water treatment plant. Control systems were designed based on instrumentation proposals, enabling reliable measurements and practical actions. In addition, an algorithm of supervision and automatic control using a programmable programmable logic controller (PLC) is presented, making the plant capable of delivering a product in optimal conditions. Images were designed for local and remote process control using a human-machine interface (HMI) panel and a supervisory control and data acquisition (SCADA) system. Finally, an automation architecture with a decentralized periphery is proposed to ensure safety and accuracy in the system's decision-making through communication protocols.

Advancement in Remote Terminal Units (RTUs) and intelligent instrumentation, as well as Programmable Logic Controllers or PLCs, have found their application in process monitoring and control in different industries or fields. Through the use of such control sensors and components, SCADA systems have been easier to manage and implement. SCADA is largely applied in process industries, for instance in electric power generation, oil and gas, water and water control, distribution and utilities, transportation systems, agriculture and irrigation and so on (Agarwal, 2017). In the paper, the areas of study will be the application of SCADA in the water and water control, i.e., water and sewage treatment process.

Modern process control systems are used in industrial automations for flexibility, modularity and reliability, employing state of the art technology based on three concepts: distributed control system (DCS), programmable logic controller (PLC) and most importantly supervisory control and data acquisition (SCADA). This paper deals with design and implementation of a SCADA system for a central heating and power plant, which is planned to supervise and control field distributed electric devices using Siemens equipment and software ldquoprocess control system 7rdquo (PCS7). The system also allows web-based applications via OPC and Web server by using the existing communication infrastructure. Redundancy is present at the server levels. The system is currently in use at COLTERM Central Heating and Power Plant South (CET South) of Timisoara.

Water supply represents a vital problem for people, and this imposes the need to know the information regarding consumptions, resources and production. This implies a continuous supervision of the water supply process in order to allow any problem that could appear to be solved, and in the same time, to maintain normal functioning parameters. Proper solutions imply automation and monitoring architectures which contain: a supervision and control system for the real time installation, programmable logic controllers with basic functions (communication, adjusting, measuring, etc.) libraries, communication systems, standard interfaces or dedicated ones with sensors, electrical drive elements, measuring devices, etc. The informatics systems present the possibility of preventing some phenomenon, by analyzing and processing the data, leading to an optimum functioning and to important financial economies. In this way, the paper presents a SCADA system for the monitoring and control of the technological parameters in the water distribution stations, which will allow the optimum functioning of the pumping system, safety and endurance growth in the equipments and installations exploring, and so obtaining efficient energy usage and optimum administration of the drinkable water.

This paper outlines the various stages of operation involved in the conversion of a manually operated boiler towards a fully automated boiler. Over the years the demand for high quality, greater efficiency and automated machines has increased in this globalised world. The initial phase of the paper focuses on passing the inputs to the boiler at a required temperature, so as to constantly maintain a particular temperature in the boiler. The Air preheater and Economizer helps in this process. And the paper mainly focuses on level, pressure and flow control at the various stages of the boiler plant. Thus the temperature in the boiler is constantly monitored and brought to a constant temperature as required by the power plant. The automation is further enhanced by constant monitoring using SCADA screen which is connected to the PLC by means of communication cable. By means of tag values set to various variable in SCADA the entire process is controlled as required. At the automated power plant, the boiler is controlled by Variable Frequency Drive (VFD) to put in action the required processes to be carried out at the boiler. Thus the entire cycle is carried out as a paper and at various stages each phase is detailed out. This paper has proved to be very efficient practically as the need for automation grows day by day.

This paper presents technical communication of automation industry which describes the technical issues of automation control system in operation development, improving management level and high efficiency process in water treatment system. Today's water treatment plants are applied for water conservancy projects, emerged by the technology of automation control system is to ensure safe, continues, high quality water supply to municipal and for multi-purpose usage. Along with automation technology, computer technology, network communication development, advanced water treatment monitoring system is realized in Nantong pengyoa water purification plant. The Nantong pengyoa water purification plant has an important beneficial industry relationship to People's Republic of China improving living status and environment condition mainly expounds the water supply, to build well-off society, comparatively improving the labor production growth & level of implementation of targets as well as high water quality requirements. In this paper, it develops the task and tells the technical solutions of water treatment plant which has been centralized in fully automated operation in some developed industries since many years. And also append short description of its current practices such as networking, and real-time monitoring control, composition & structure, process flow and automatic process control which are performed in water treatment plants to achieve high efficiency in quality of productivity.

Fusion Engineering and Design, 2019

This paper presents control architecture of Liquid Phase Catalytic Exchange (LPCE) process from Pilot Plant for Tritium and Deuterium Separation (PESTD) ICSI Rm. Valcea, as part of plant control and safety strategy. The PESTD control system has been built on distributed control and SCADA, in order to achieve the facility's goal to detritiate heavy water, protecting the personnel, the public and the environment. The architecture of control system combined with hardware configuration and software applications avoid process control interruption and keep it within safety limits. This new system is realized as response to updated requirements for PESTD related to process configuration and safety requirements (related to tritium and hydrogen) considering applicable norms and laws of the Romanian Regulatory Body for nuclear activities. The work done to implement these requirements has been complex, especially due to the particularity of the existing situation. The experience gained during development of LPCE process control was used to complete control system of PESTD and manage the ongoing changes that characterize a research facility. The approach used in LPCE process can be considered for other similar facilities, with differences and particularities resulting from the applicable local legislation.

In the recent years, with the advent of control systems, SCADA has played an important role in the field of automation. SCADA systems offer a means of controlling remotely located devices in an industrial process. Supervisory control can be combined with data acquisition wherein the data is obtained from the devices and it is processed further according to the user's needs. This paper offers an insight into the functioning of a typical SCADA system and its application for thermal power plant. The paper presents various types of architecture of such control systems, along with an overview of the security concerns pertaining to them.