Testing of regulating complex for Novosibirsk Heat and Electricity Station (TEC - 4) steam turbine

“SRC “Rakurs” Ltd. has implemented pre-delivery testing of an electric part of regulating and protecting system’s hardware and software complex (EPRP H&SC) for a steam turbine of Novosibirsk Heat and Electricity Station (TEC - 4). The testing has been carried out at the company’s testing floor. The EPRP H&SC is intended for controlling of a steam turbine in the full range of operating modes and for protecting of the turbine under the conditions of emergency states.

The testing has benefited from simulation modeling of the steam turbine technological processes, which had become possible owing to carrying out testing using the steam turbine model. The model had been developed by “Rakurs-engineering” Ltd., “Rakurs” group of companies.

The EPRP H&SC is a subject of packaged delivery of the steam turbine Т-110/120-130-ПР3-1 produced by CJSC "The Ural Turbine Works".

The steam turbine model connects to EPRP control cabinet by the means of physical lines and thus provides adequate simulating of signals exchange with the turbine’s actuators and sensors.

The model simulates operating of the hydraulic part of regulating system and processes in turbine compartments, production and heating extractions, water heat exchangers and condenser. It also includes a software unit representing the energy grid and describing turbine’s behavior when connected to the grid.

The model application provides a means of complex investigation for all control loops implemented, under conditions of interrelated variation of technological parameters due to incoming controlling and disturbing actions.

The following turbine operating modes have been simulated during the complex investigation in order to test the control loops of the EPRP H&SC:

• turbine start-up and rotation frequency regulating;
• synchronizing and connecting to the energy grid;
• load increase and load controlling when connected to the energy grid;
• drop of load;
• extraction pressure regulating;
• heating water temperature regulating;
• steam supply limiting in compliance with active power, pressure an temperature limitations;
• participation in primary frequency control of the energy grid.

The testing has been carried out in accordance with the approved testing schedule in the presence of The Ural Turbine Works representatives. According to the protocol signed the electric part of regulating and protecting system’s hardware and software complex has successfully passed all tests specified in the testing schedule.