Logistic system and device for generator failure intertripping stator cooling water pump

Abstract

The present invention discloses a logistic system and device for a generator failure intertripping stator cooling water pump. Soft logic is performed in a distributed control system (DCS) of a generator set, interlock stop motion signals are added on the basis of the logic of the original manual stop stator cooling water pump, the interlock stop motion signals control the stop of the stator cooling water pump through OR logic, a generator-transformer unit protection motion closure main throttle valve command is accessed, a certain delay time is set through a delay module, and a stand by pump is newly added to improve the redundancy of the whole water pump set. The whole scheme is simple in logic with no need for adding new devices, the generator is prevented from entering cooling water when the generator generates faults to have good protection effect on the generator, facilitate later maintenance, avoid generation of misoperation and improve the reliability of the whole logic system.

Description

technical field [0001] The invention relates to the technical field of generator equipment, in particular to a logic system and device for a generator fault interlock and trip stator cooling water pump. Background technique [0002] A generator refers to a mechanical device that converts other forms of energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and transmits it to the generator. It is then converted into electrical energy by a generator. [0003] Generators are widely used in industrial and agricultural production, national defense, science and technology and daily life. There are many forms of generators, but their working principles are all based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is: us...

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Problems solved by technology

[0005] However, when the generator is working, sometimes the generator fails due to external or internal reasons. When the generator fails, serious leakage of the generator may cause electrical protection actions such as grounding of the generator stator or even differential. After the protection action, the stator cooling water cannot be cut off in time, and the stator cooling water pump used for cooling continues to work, and it is easy to inject a large amount of cooling water into the generator, resulting in the expansion of the generator failure and causing great difficulties to the later equipment repair. ; and there is no accurate data for judging generator failures, and different or necessary measures cannot be taken according to different failure conditions of generators

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