One-key start-stop control system for fuel gas and steam combined cycle unit

Abstract

The invention discloses a one-key start-stop control system for a fuel gas and steam combined cycle unit. The combined cycle unit at least comprises a combustion engine and a combustion engine auxiliary system, a steam turbine and a steam turbine auxiliary system, a waste heat boiler, a BOP (branch of plant) system and a common system; the one-key start-stop control system covers the combustion engine and combustion engine auxiliary system, the steam turbine and the steam turbine auxiliary system, the waste heat boiler, the BOP system and the common system; the one-key start-stop control system is a hierarchical control structure and comprises a unit coordinating level control module, a subgroup level control module and an equipment level control module from an upper layer to a lower layer in sequence. The system provided by the invention realizes safe and reliable start and stop of the combined cycle unit; the start-stop process of the unit is solidified to the control system, so that artificial error operation is prevented; artificial interference in the operation of the unit is greatly reduced, and the reliability of the unit is greatly improved.

Description

technical field [0001] The invention relates to the technology in the field of thermal automatic control of a gas-steam combined cycle unit, in particular to a one-button start-stop control system for a large combined cycle unit. Background technique [0002] One-button start-stop (APS, automatic power plant start up&shut down system) is a system to automate the process of starting and stopping the generator set, and it is one of the latest development directions of thermal automation technology. As an effective method to improve the automation level of the unit, it has received more and more attention and attention from the industry. The one-button start-stop control system has powerful functions, and its advantage is that it can improve the correctness and standardization of unit start-stop, and greatly reduce the work intensity of operators. An effective one-button start-stop control system can enhance the safety of equipment operation, shorten the start-stop time of the...

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Problems solved by technology

[0009] 2. A power plant in Shenzhen reported that in 2007, all three units under its command had achieved one-key start-up in the whole process, but according to the report data, the process of boiler water filling and other processes was still carried out manually, so it was far from the one-key start-up process in the whole process and the whole range there is still a gap

[0010] 3. A gas turbine power plant in Shanghai only realizes the one-button start-stop function of the start-up part of the combustion engine-steam turbine-generator on the TCS side, and its APS does not cover the furnace island and BOP (balance of plant) system

[0011] It can be seen that although a few domestic gas-steam combined cycle units have developed a one-button start-stop control system, the scope of equipment involved in start-stop, the degree of automation of the start-stop process, and the economy and safety of the start-stop process The analysis of performance and other aspects still needs to be further optimized and improved.

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