Automatic interlocking control method and device for safety section of large gas-steam combined cycle generator set

Abstract

The invention relates to a security section automatic interconnected control method and device for a large gas-vapor combined cycle generator set. The method is characterized in that a DCS (distributed control system) is adopted for logical configuration, so as to realize the instant switching of a working power supply, a reserve power supply and an output power supply of a diesel generator in the security section, and includes the following steps: firstly, setting the separating brake control logic of the working power supply; secondly, setting the switching-on control logic of the reserve power supply; thirdly, setting the switching-on control logic of the working power supply; and fourthly, setting the control logic of continuous lubricant oil supply. The control device includes the working power supply, the reserve power supply, the output power supply of the generator, a switch module of the working power supply, a switch module of the reserve power supply, a switch module of the diesel generator, the DCS and security section equipment. Through the adoption of the device and the method, switching delay of the working power supply, the reserve power supply and the output power supply of the diesel generator is shortened, and the method and the device have the benefits of reliable switching, selectivity, guaranteed normal working of the security section equipment, and guaranteed normal working of the continuous cyclic generator set.

Description

technical field [0001] The invention relates to an automatic interlocking control method and device for a security section of a large gas-steam combined cycle generator set. It belongs to the technical field of gas-steam combined cycle power generation equipment. Background technique [0002] In the prior art, large-scale gas-steam combined cycle generator sets generally do not have a main oil pump coaxial with the unit. During normal operation, the lubricating oil pump connected to the security section is mainly used to supply oil to each bearing of the unit. Due to the fast and reliable requirements for the interlock control of the security section, in the interlock control of the prior art, the cooperation between the working power control circuit, the backup power control circuit and the diesel generator starter cabinet is not good, which is specifically manifested in the working power supply. , The switching delay between the backup power supply and the output power of...

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Problems solved by technology

Due to the fast and reliable requirements for the interlock control of the security section, in the interlock control of the prior art, the cooperation between the working power control circuit, the backup power control circuit and the diesel generator starter cabinet is not good, which is specifically manifested in the working power supply. , The switching delay between the backup power supply and the output power of the diesel generator is too long, the switching is unreliable, and there is no selectivity, so that the equipment in the security section cannot work normally, which will bring harm to the work of the continuous cycle generator set, damage the equipment, and even cause serious damage. ACCIDENT

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