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Krasnoyarsk CHPP-1. Boilers Nos. 8-12. Management information system

Krasnoyarsk CHPP-1. Boilers Nos. 8-12. Management information system

The system is designed for automation of information functions, control functions, technological protections and interlocks of boilers No. 8-12 of OJSC “Krasnoyarsk CHPP-1”.

The goal of management information system (MIS) creation is to enhance fail-safety and equipment functioning safety and to provide better maintaining of boiler combustion mode.

This is information system supplemented by control functions.

The MIS central part is the DCS1 “TORNADO-N”, which includes programmable automation devices and other computer equipment.

The objects of automation are PK-10 Sh-2 boilers manufactured by Machine-Building Factory of Podolsk named after Ordzhonikidze. The boilers are vertical water-tube, with natural circulation, shaft mills, a fully shielded furnace and a two-stage evaporation system. The boilers have two drums: the main drum and the letdown drum. Vapor-liquid separation occurs in the latter one.

The main characteristics of the PK-10 Sh-2 boilers:

  • Pressure in the drum – 110 kgf / cm²,
  • Pressure behind the superheater – 100 kgf / cm²,
  • Overheated steam temperature – 540 °C,
  • Capacity – 220 t / h,
  • Feed water temperature – 215 °C.

Performance parameters of the system based on DCS “TORNADO-N” compared to the requirements of RD 153-34.1-35.127-2002 (“General Technical Requirements for Distributed Control Systems for APCS of Thermal Power Plants”) are given in Table 5.3.


Table 5.3

Parameter name

Requirement of RD 154-34.1-35.127-2002, p. 4.3

DCS Tornado-N indicators

Periodicity of signals scanning, which ensures the requirements of accurate recoding of events and values of analog signals with respect to the DCS system time (depending on the dynamic properties of a parameter):

- discrete trigger;

- analog and discrete.


10 – 500 ms

0.1 – 2 s

< 10 ms

< 30 ms

Delay between the call-up of a standard operational mimic diagram (symbolic circuit, menu, images in the control window) on a video terminal display and its full emergence.

2 – 2.5 s

< 2 s

Update cycle of operational (current) information on the video terminals.

1 – 2.5 s

< 1 s

Delay of emergency information transfer.

0.5 – 1 s

< 0.25 s

Delay of safety alarm information transfer.

0.5 – 1 s

< 0.5 s

Control commands response time via the technological protection channels if emergency condition is detected.

0.1 – 0.2 s

< 0.05 s

Minimal duration of a regulator impulse supplied to the actuator at a change step not more than 0.1 s.

0.125 s

Set with 20 ms increments

Quantization time of regulator impulse duration.

0.1 s

0.01 s

Average time of command transmission and confirmation callback by the actuator (without delays of control command processing by the actuator – a gap, etc.).

1.5 – 2 s

< 1 s

General delay in transfer of the staff control actions along a circuit of the remote control.

1.0 s

< 0.25 s

General delay in information transmission along a circuit of adjustment or control of lower level (standard interlocks) from the sensor to the actuator.

-

< 60 ms

General delay in transmission of feedback signals of discrete state change of the control objects

-

< 0.5 s

General delay of command transmission from the emergency button to the display of response information

-

< 0.5 s

The industrial embedded NDiS 126V computers manufactured by Nexcom company are used as AWS2 system units of boiler units No. 8 ÷ No. 12. The NDiS 126V computers have high-definition graphics capabilities of playback and low power consumption.

Characteristics of the NDiS 126V computer are given in Table 7.1.


Table 7.1

Central processing unit (CPU)

Intel Atom D2700 2.16 GHz

Random-access memory (RAM)

1x 200 pin SODIMM socket

DDR SDRAM 2 Gb

Memory modules

Up to 4 Gb

External interfaces (ports)

2x RJ45 Fast Ethernet; 1 RS-232

6xUSB 2,0; PS/2 for mouse and keyboard

Storage devices

2,5‘’ HDD bay

Operating system

Windows 7 Pro

Power adapter, without power cable

50 V

Output power

+12 V DC

Operating conditions


Operating temperature range: from 0 °C to 40 °C; a fan is not required.

Permissible relative humidity up to 9% without condensation

Dims

185x48,4x147 mm


The industrial ARK-3360F computers manufactured by Advantech company are used as processing units in the controller cabinets. The ARK-3360F computers demonstrate a high level of performance and reliability.

Characteristics of the ARK-3360F computers are given in Table 7.4.


Table 7.4

Central processing unit (CPU)

Intel Atom D510 1.67 GHz

Random-access memory (RAM)

1x 200 pin SODIMM socket

DDR SDRAM 2 Gb

External interfaces (ports)

2x RJ45 Fast Ethernet;

6xUSB 2,0; PS/2 for a mouse and a keyboard

Storage devices

SSD

Operating system

Windows XP Embedded

Operating conditions

Operating temperature range: from -20 °C to +60 °C (with the CompactFlash card); a fan is not required.

Permissible relative humidity up to 95% at 40 °C without condensation

Output power

+12.. +24 V

Dims

264,5x69,2x137,25 mm


The processing units in the cabinets are arranged in pairs, i.e, forming a redundant architecture – the first one is an operating unit, second one is redundant. Both units are synchronized with each other. This allows bumpless switching from the operating to the reserve unit and vice versa (hot reserve).

Each of the processing units has three independent Ethernet interfaces. The first interface is used for information exchange between the operating and redundant units, the second and the third interfaces are used for connection to the Ethernet network.

 

1 Distributed control system.

2 Automated workstation.

krasnoyarsk-2015.png


 

 


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