Crane site telemechanization

General part

Telemechanization section is performed in accordance with the "Technical Conditions for Design and Construction of Gas Pipeline-Discharge to AGNKS400" dated xx.xx.xxxx signed by the Board Member, Head of the Department for Transportation, Underground Storage and Gas Use XXXXXXXXXXXXXXXX.

The project envisages telemechanization of the crane site of the gas pipeline connection to the GPU XXXXXX, as well as transfer of measurement data of process parameters in the measuring pipeline and flow information from the gas metering unit to the gas volume calculator, with subsequent transfer via the GSM channel to the control room XXXXXXXXX LUMG.

Telemechanization

Via the telemechanics channel from the existing telemechanics CP installed in the RRS room with XXXXXXx to the CP it shall be possible to transmit the following (main minimum) telecom unit:

• Tele-measurement

- pressure before and after the crane;

• Telesignalization

- condition of the protective crane;

- violation of crane platform perimeter;

- unauthorized opening of crane platform gates;

- signalling of actuators circuits integrity;

- loss of external power supply.

• Telecontrol

- opening and closing of the protective crane;

The remote control of the security crane by the dispatcher XXXXXXXX LPUMG is possible using existing equipment in the GRS box XXXXXXX with the addition of the following equipment:

- Power element module SE01.

Power element module SE01 performs functions of telecontrol of one two-position object and transmission of its state information to communication and control unit (BSO ).

The SE01 module, like all modules of the complex, operates within the framework of the Modbus RTU protocol, which assumes the presence of one master device and many slave devices. The main device at the SC level is the communication and control unit, which is connected via the RS485 interunit interface with all other modules.

Connection units BS01 M No. 1, BS01 M No. 2, BS01 M No. 3 are used as a terminal block for connection of functional units from USU to telemechanization objects (sensor equipment), which are included in the equipment package in the GRC box XXXXXXX.

Electro-pneumatic control device of EPUU with 24V DC operating voltage is used as actuating device for telecontrol of opening and closing of shutoff valves.

Absolute pressure sensor TZHIU.40233.008 TU is used as a pressure monitoring device after the protective crane, designed to measure the gas pressure taking into account atmospheric pressure and convert it into a unified current signal 420mA.

All connections of communication cables and equipment for control of position of shutoff valves, process parameters monitoring, security site perimeter protection system in the design are provided in the junction box KSW11.

Junction box KSW11 has explosion-proof level with marking 1ExdIIBT5 (explosion-proof shell). KSW11 has the degree of protection - IP54 according to GOST 1425496 and consists of an explosion-proof housing inside which there is a terminal block for 40 terminals of 3PS 2110 type with clamps for the screw.

All signals from sensors and devices through the object control device are transmitted via telemechanics channels to the existing "Trunk 2" telemechanics CP located in the control room of GRS XXXXXX and then to dispatcher CP XXXXXXXXXX LPUMG and GRS operator.

Gas metering unit

The gas metering unit in complex with the facility controller is designed for measurement, accounting, control and transfer of technological parameters of remote facilities to the control room with subsequent archiving, which allows automating the process of measurement and processing of results at the measurement complex.

The gas metering system consists of the FLOWSIC600 gas flowmeter, the SuperFlo21V computer and the KO 404 controller of the Stel telemetry system.

The FLOWSIC600 ultrasonic gas meter is used to measure the volume flow rate of gas, has the following characteristics: 4 parallel ultrasonic measuring beams, power supply 12... 28.8 V post. current, electronics with LED indication and 4 digital outputs.

The "SuperFlo21V" calculator is used to bring to standard conditions (correction) the volume of natural gas of the measured gas flowmeter FLOWSIC600, has the following characteristics: power voltage of the 930V complex, power consumption not more than 30VA, mass of the calculator not more than 3 kg, service life 10 years. Information on gas flow rate and process measurement data (temperature and absolute pressure in the measuring pipeline) are transmitted to the computer directly from FLOWSIC600, absolute pressure sensor and resistance thermal converter installed on the crane site.

The project envisages installation of the "SuperFlo21V" gas volume flow computer, as well as the object controller KO 404 of the "Stel" telemetry system in the control room of the GRS station XXXXXXXXXX. The object controller is included in the telemetry system, ensures the exchange of information over the GSM communication channel between the central control room of the regional gas company and the SuperFlo21V computer.