RU81583U1 - SYSTEM OF AUTOMATED MANAGEMENT OF A GAS DISTRIBUTION STATION OF SMALL PRODUCTIVITY - Google Patents

Abstract

The utility model relates to automated control devices. The system is an automated control system for a low-performance gas distribution station, comprising sensors, actuators installed at monitoring objects and connected via input / output modules to a central computing device to which gas flow meters are connected, an operator panel and an operator's computerized workstation, the central computing device comprising system management module, a module for processing data received from sensors, a data exchange module with a flow s gas actuators, the control unit on the basis of data received from the data processing unit. The system is based on the open industrial protocol Modbus RTU, to the central computing device, made in the form of a central controller, controllers connected to sensors, actuators are connected via the bus, and which is configured to connect additional controllers via a serial channel, the central controller is connected to the system linear telemechanics, while the central controller, controllers associated with the sensors are installed in the same control cabinet or in different electrical cabinets cafes in the zone of control objects. 1 ill.

Description

The utility model relates to devices for automated control of a gas distribution station of low productivity and is intended for monitoring, automatic control and protection of equipment of gas distribution stations with a centralized or periodic form of service.

A well-known automated control system for technological processes of gas distribution (Information and measuring system LOGIC. M :, State Register of Measuring Instruments, reg. No. 20630-00, Certificate No. 9206 of 12.01.2001), containing a block of digital gas correctors installed at the monitoring objects and connected through a communication channel and a central computing device with automated workstations of operators and a dispatcher equipped with personal computers, the central computing device comprising a server, a control module system features, a corrector polling module, a polling results display module, each of which is connected through a processor to automated workstations of operators and a dispatcher.

At the same time, digital gas correctors are made in accordance with the LNG 761 standard and contain means for measuring gas parameters in the gas pipeline (pressure, flow and gas temperature sensors) and an actuator (electromechanical device for adjusting the gas flow cross section: electromagnetic valve; reversible motor) connected via a communication controller to cable and / or modem lines of the communication channel.

A disadvantage of the known system is the lack of functionality, namely:

- the system is designed to control the technological processes of gas distribution at one enterprise (consumers using JV LOGIKA devices are geographically spaced at a distance of no more than a few km);

- the system provides work only with devices of the SP LOGIC;

- the total number of system elements cannot exceed 30 objects;

- the system provides only the display of information, information processing for rational decision by the operator (dispatcher) is absent;

- information is stored directly in the corrector memory for a limited time and when the device or the communication channel fails, information is lost, the possibility of creating an electronic archive is not provided;

- there is no possibility of automatic generation of electronic documents.

Known adopted as a prototype automated control system for technological processes of gas distribution, containing a block of gas correctors installed on the objects of control and connected through a communication channel and a central computing device with automated workstations of operators and a dispatcher equipped with personal computers, the central computing device containing a server, system management module, corrector polling module, polling results display module, each of which is connected through a processor to the workstations of operators and the dispatcher, the workplace of the dispatcher

additionally equipped with a reporting form printer and an alarm message printer, the central computing device further comprises an adapter block, an alarm message module, a communication control module connected to the processor, the signal output of the polling result processing module being connected to the input of the reporting report network printer, the signal output of the alarm message module - with a network printer for alarm messages, and the signal output of the communication control module with the control input of the adapter block of the central computer casting device (RU No. 46871, G06F 17/60. publ. 2005.07.27).

The disadvantage of this system is the complexity of its execution, due to the simultaneous solution of several functional tasks and the adjustment of control signals for actuators when the control parameters deviate from the indicators set as the norm.

The basis of this utility model is the task of creating an automated system, the design of which eliminates the above technical shortcomings, and thereby increase the reliability of the system in terms of monitoring the operation of actuators and providing remote control capabilities.

The basis of this utility model is the task of creating an automatic control system for gas distribution systems for the automation of technological processes associated with the supply of gas to consumers.

The technical result achieved in this case is to increase the reliability of the system by building it on the basis of distributed microprocessor control and data acquisition systems.

The specified technical result is achieved by the fact that in the automated control system of a gas distribution station of low productivity, which contains sensors and actuators of gas reduction units installed at the monitoring objects and connected via a communication channel to a central computing device to which the printing unit, the GSM communication unit are connected, and computerized workplace of the operator,

the central computing device comprises a system control module, a module for processing data received from sensors, a control module for actuating devices of the reduction units based on data received from the data processing unit,

actuators of the gas reduction unit installed on the monitoring objects are connected to a central computing device designed as a central controller via a bus to which I / O controllers connected with sensors are connected, and which is configured to connect additional I / O controllers via a serial channel ,

the central controller is connected to the linear telemechanics system, while the central controller, input / output controllers associated with the sensors, are installed in the same control cabinet or in different control cabinets in the area where the control objects are located.

These features are significant and are interconnected with the formation of a stable set of essential features sufficient to obtain the desired technical result.

The present utility model is illustrated by a specific example of execution, which, however, is not the only possible one, but clearly demonstrates the possibility of achieving the required technical result.

Figure 1 presents a block diagram of an automated control system of a gas distribution station of low productivity.

In the framework of this utility model, we consider a system of automated control of a gas distribution station (GDS) of low productivity (hereinafter - ACS GDS), designed to control, automatically control and protect the equipment of gas distribution stations with a centralized or periodic form of service.

The automatic control system of gas distribution systems is built on the basis of the open industrial protocol Modbus RTU, reads the gas flow rate from the gas flow meters FloBoss, TeleFlow, followed by the transmission of information to the upper level, is integrated into telemechanics systems supporting the Modbus RTU exchange protocol (SLTM SC M, etc.), as well It has a bi-directional data interface with other autonomous systems that support the Modbus RTU exchange protocol.

ACS GRS provides the implementation of the following main functions:

- Telemetry of technological parameters;

- Tele-alarm condition of cranes and actuators;

- Alarms (gas pressure at the inlet and outlet of the gas distribution system, temperature, gas contamination, etc.);

- Remote control of cranes, actuators;

- Automatic consumer protection against over / under pressure;

- Display of information on telemetry and telealarm on the operator panel;

- Remote transmission of information about the status of the GDS to the operator’s house through a GSM modem;

- Transfer of information to the "upper" level, as well as receiving and ensuring the execution of commands from the "upper" level;

- Interaction (signaling the state and operating modes of equipment, issuing necessary parameters, issuing control commands, reading parameters with subsequent transfer to the “upper” level) with local automation systems existing on the gas distribution system (for example, an automated gas odorization system, gas heater control system, system cathodic protection, security and fire alarms, gas flow calculators, etc.). Hardware:

- USO controllers based on DCS-2000 series modules (CJSC Emikon, Russia);

- operator panel UniOp СР 1 OG-04 (EXOR ELECTRONIC R&D, USA);

- power supply ~ 220 V / = 24 V ACE-540A (ICP Electronics Inc, Taiwan);

- uninterruptible power supply unit UEPS-2 (Promsvyaz OJSC, Russia);

OnCell G2150I GSM-modem, GDS connection with the operator’s house (MOXA Technologies, Taiwan). Software:

- application software of DCS-2000 series controllers, developed by CONT-Designer programming system;

- UniOp operator panel application software was developed using the UniOp-designer software package.

The power supply of the automatic control system equipment is carried out from an alternating current network with an input voltage range of 85 to 264 V. The backup power input is made from a 24 V DC source. Power consumption in normal mode is not more than 60 watts.

All analog and digital input modules have intrinsically safe input circuits (ExibIIc).

The automatic control system of gas distribution systems performs the functions of reading / writing gas flow parameters from gas flow meters (FloBoss, TeleFlow, LNG, etc.), transferring the collected information to the upper level of the operator’s workstation, to the linear telemechanics system (SLTM SK M, EEC TM, etc.) . The accounting of gas consumption is carried out by certified complexes (calculators), which are subordinate, locally operating devices in relation to the system. The presence of a PC (operator workstation) is not a prerequisite, but is a functional extension of the system.

The core of the system is a central controller and at least one I / O controller associated with the sensors. The central controller, the controllers associated with the sensors, are installed in the immediate vicinity of the objects of control and management (including in the hazardous area, with the appropriate version of the controllers) and can be located in the same electrical cabinet or in different electrical cabinets, including in different rooms. The automatic control system of the GDS provides for the possibility of hot (on a working controller) replacement, removal or addition of input / output modules by connecting the modules via a serial channel.

The main device for displaying, registering, entering information is the operator panel of the UniOp series. The same panel displays alarm logging.

The list of gas flow calculators with which the automatic control system of the gas distribution system interacts is not finite, but can be supplemented to the requirements of a particular monitoring and control facility,

The automatic control system of the gas distribution system does not have hard-wired algorithms for controlling actuators; the systems have a list of typical algorithms that can be supplemented to meet the requirements of a particular monitoring and control facility.

Figure 1 shows the block diagram of the ACS GRS. The ACS GRS includes sensors 1 connected in groups with a corresponding input / output controller 2, each of which has at least one output 3 for connection with an actuating control device 4. All controllers 2 connected to a common RS-485 bus (item 5), which allows additional controllers 6 to be connected in serial mode. A central controller 7 is connected to bus 5, to which a computerized workstation 8 of the operator is connected, equipped with a panel 9 of the UniOp series for display sensor data and system operating modes and gas flow meters. From the workplace, the operator can change the algorithms of the controllers 2. The printer 10 and the GSM 11 modem provide a printout of system operation data and communication with the operator. The central controller is also connected to the dispatch center, along the line of linear telemechanics and gas metering systems.

The automated control system of a gas distribution station of low productivity works as follows.

The operator using the keyboard on a computerized workplace selects the algorithm for the functioning of the controlled objects of the gas distribution system. In this case, an electrical signal in the form of a corresponding pulse-code sequence of pulses is transmitted from the operator’s workplace to the central controller, which generates control signals and transmits them to the input / output controllers 2, forming an algorithm for their functioning. The signals from the sensors 1 enter the input / output controllers 2 and form

the current database, on the basis of which the controllers 2 generate corrective control signals to the actuators. Measurement results and control modes of gas flow meters are displayed on the operator panel.

This utility model is industrially applicable, tested and is in experimental operation at a gas distribution station.

Claims (1)

An automated control system for a low-performance gas distribution station, comprising sensors, actuators, and gas metering units installed at monitoring facilities and connected via a communication channel to a central computing device to which a printing unit, a GSM communication unit, and a computerized operator’s workstation are connected, the central computing device comprises a system control module, a module for processing data received from sensors, an executive control module devices of the gas reduction unit based on data received from the data processing unit, characterized in that the system is built on the basis of the open industrial protocol Modbus RTU, and the actuators of the gas reduction unit installed on the monitoring objects are connected to a central computing device designed as a central controller through the bus to which the controllers connected to the sensors are connected, and which is configured to connect additional controllers in series channel, and the central controller is connected to the linear telemechanics system, while the central controller and the controllers associated with the sensors are installed in the same control cabinet or in different control cabinets in the area where the monitoring objects are located.