Purpose of the system:
АThe automated process control system is designed for automated control of turbine operation and auxiliary equipment in order to achieve optimal technological parameters, increase the reliability of turbine operation in various modes and the safety of service personnel through the use of modern microprocessor control systems and computer equipment.
Description of the system:
The auxiliary equipment to be automated includes:
- network electric pumps;
- deaerator;
- heat supply pumps;
- condensate pumps of the chemically treated water heater;
- sewage pumping pumps;
- fire extinguishing pumps;
- hydraulic lock of thermal network protection;
- circulating pumps of circulating water supply;
- fan cooling towers
System structure:
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- The lower level includes technological equipment, actuators and an information and measuring complex of sensors.
- The middle level (the level of technological control subsystems), consisting of a programmable logic controller SIMATIC S7-400H (SIEMENS) and ET200M (SIEMENS) stations. The basis of the stability of the system is redundancy at the level of the programmable logic controller and communication with the I/O subsystem and the database server, which allows the programmable controller to autonomously perform tasks of safe process management. Information exchange between distributed I/O stations and control controllers is implemented over the PROFIBUS DP network. The distributed system allows not only to significantly reduce the number of cable lines, but also to remove individual technological installations and nodes from the process without stopping the main technological process. The main task of the level is the collection and processing of current data on the state of the technological process, the implementation of automatic control and control algorithms. Turbo generator protection algorithms, automatic control, safety locks, AVR algorithms are implemented at the PLC program level.
- Operational management level – the level of remote monitoring and control of actuators, setting the operating modes of control subsystems with the functions of technological signaling (audio and visual) at operator stations, maintaining archives on operational data, both on the condition of equipment and on the measured parameters of the technological process on the server, based on the WinCC (SIEMENS) SCADA system. Communication between the components of the operational management level and the middle level is implemented over a redundant Industrial Ethernet network. The functionality of our SCADA system allows you to quickly parameterize the protection of the turbo generator from any workstation, depending on the access level, adjust the regulators, control the AVR algorithms. The consequence of triggering one protection may be the cascade triggering of a group of protections, as a reaction to a sharp change in technology parameters. The system uniquely determines which protection worked first and led to an emergency stop. A special message “Emergency stop from protection N” is generated, the reason for the emergency stop is visually displayed on the screen form of the protections. Any action to change the protection parameters is recorded and logged by the message registration system. The consequence of triggering one protection may be the cascade triggering of a group of protections, as a reaction to a sharp change in technology parameters. The system uniquely determines which protection worked first and led to an emergency stop. A special message “Emergency stop from protection N” is generated, the reason for the emergency stop is visually displayed on the screen form of the protections. Algorithms for automatic reserve input (AVR) allow you to switch to backup equipment without shock and painlessly for the technical process, while there may be several conditions for triggering the AVR, as well as configurations of working and backup actuators. The solutions we use in the field of automatic control of process parameters have rich tools for configuration and adjustment with differentiation by access level
The solutions we use in the field of automatic control of process parameters have rich tools for configuration and adjustment with differentiation by access level.
- The upper level is a display of information about the progress of the technological process at the workstations of the management staff via a Web interface with the exception of control functions and changes in the operating modes of control subsystems. The upper level is implemented for all automation systems implemented by our company as part of the comprehensive reconstruction of the Brest CHP. Using standard industrial network solutions, the automated process control system can be connected to other equivalent systems or incorporated into higher-level enterprise management systems (ERP, MES). According to the applied method of implementation, the automated process control system has no restrictions on the development of the structure and composition of the system at all levels.
Purpose of the system:
The equipment for automation of 0.4 kV shields of the Belarusian Gas Processing Plant (BGPP) is used to collect and process data from the microprocessor protection units of 0.4 kV shields, transmit information to the upper level of the automated power supply control system, in order to achieve optimal technological parameters, increase the reliability of operation in various modes and the safety of service personnel through the use of modern microprocessor control systems and computer equipment. The supplied equipment consists of fully assembled and ready-to-install cabinets SHTM-1 – SHTM-10.
Description of the system:
The mode of operation of automation facilities is continuous, round-the-clock. The load is conditionally constant.
Composition and functioning of additional equipment of the system
The supplied equipment (SHTM-1 – SHTM-10) is fully integrated with the existing 0.4 kV automation system of the Belarusian Gas Processing Plant, both in hardware and software at all levels, which allows the commissioning of the facility without additional financial and time costs
The delivery of this equipment was carried out in assembled form (cabinets) and ready-made project documentation (for cabinets), which made it possible to proceed with the installation and connection of cable products in the shortest possible time.
The automated power supply management system (ASUE) is designed for operational-dispatching and operational-technical control and control of switchgear equipment in normal, transient and emergency operating modes, namely:
- protection and automation;
- automatic control;
- technical accounting of electricity;
- exchange of information with the upper level of operational dispatch management.
For the organization of an automated control system of 0.4 kV panels and data transmission to the upper level of the power supply control system, the following were provided:
- telemechanics cabinets SHTM-1 – SHTM-10 for collecting and processing data from electronic consumer protection units of 0.4 kV panels and transmitting information to the upper level of the automated power supply management system of the enterprise;
- all cable connections (patch cords) between the equipment of the telemechanics cabinet SHTM-1 – SHTM-10;
- power supplies for all equipment of the telemechanics cabinet SHTM-1 – SHTM-10;
- metal cabinet of hinged design for the placement of all the listed equipment, with a degree of protection IP21, with a door that closes with a key;
- computing information processing tools, including a complete set of hardware and software.
The implementation of this project has allowed to achieve all the required technological parameters of the ASUE.
Purpose of the system:
The MPCG automated control system is designed to monitor and control the technological processes of gas injection, storage and extraction from underground reservoirs in the salt deposits of the Mozyr salt dome structure located 5 km south of the city of Mozyr. Automated process control system MPCG provides long-term, efficient and trouble-free operation of production equipment at minimal operating costs.
The automated control system of the MPCG provides for centralized management and control over the main and auxiliary technological equipment from the level of the MPCG dispatcher.
The control room is located on the territory of the MPCG. Local control systems and ACS are installed in block boxes at the technological sites of the corresponding technological installations or in specially provided panel (hardware) rooms of buildings.
Production facilities in accordance with the classification of production for explosive, explosion and fire hazards have category A. To comply with safety standards, the applied measuring and control equipment provides the type of explosion protection “intrinsically safe electrical circuit” in the necessary areas.
The system provides reliable control of the operation of the facility in all modes – pre-start, start-up, normal technological mode, stop mode (planned and emergency). The control system provides rational and optimal control of technological processes and is performed on a microprocessor-based software and hardware distributed control complex with a network structure based on SIMATIC S7-300 (SIEMENS) programmable logic controllers and ET200M (SIEMENS) distributed I/O stations.
The basis for the stability of the MPCG automated control system is the construction of a system based on local programmable logic controllers with an input-output subsystem, which allows the programmable controller to autonomously perform the tasks of safely conducting the technological process, as well as backup of top-level database servers and operational control systems.
System structure:
The structure of the automated process control system MPCG is a multifunctional distributed control system and contains three levels:
The lower level
(“field” instrumentation and control equipment) consists of executive equipment, technological equipment and an information and measuring complex of sensors;
The middle level
is a distributed data acquisition and control system based on SIMATIC S7-300 (SIEMENS) programmable logic controllers and ET200M (SIEMENS) distributed I/O stations that collect and process information for the system database and implement all the technological functions of the control system. Also, the mid-level PTK includes distributed hardware of the BEAO system (Emergency Shutdown Unit) located in the cabinets of local controllers;
The upper level
The upper level is the level of central operational control with the implementation of remote control of actuators, changing the operation modes of control subsystems, presenting information on monitors, audio and visual technological signaling, means of maintaining long-term and short-term data archives based on SIEMENS industrial stations and the WinCC (SIEMENS) SCADA system, as well as the central part of the BEAO system consisting of the SIMATIC S7-300 (SIEMENS) BEAO controller and the BEAO remote control.
The system has full redundancy at the levels:
- database servers;
- power supply systems, through the use of the main (IPB) and backup power supply;
- special software.
Information exchange between distributed I/O stations and control controllers is implemented over the PROFIBUS DP network. The distributed system allows not only to significantly reduce the number of cable lines, but also to remove individual technological installations and nodes from the process without stopping the main technological process.
Using standard industrial network solutions, the MPCG automated process control system can be connected to the level of the Central Data Center of JSC Beltransgaz. According to the applied method of implementation, the automated control system of the MPCG has no restrictions on the development of the structure and composition of the system at all levels.
The exchange of information between servers, operational management workstations, specialist workstations and controllers is implemented over the Industrial Ethernet network.
