System and method for achieving emergent shutdown of steam turbine in nuclear power station
An emergency shutdown and steam turbine technology, applied in the field of nuclear power, can solve problems such as inability to emergency shutdown, and achieve the effect of avoiding the impact of misjudgment and economic operation.
Active Publication Date: 2014-06-11
中广核工程有限公司 +1
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a shutdown signal generated by the shutdown button that can directly act on the shutdown solenoid valve in view of the problem that the shutdown button of the steam tur
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[0022] In order to make the object, technical solution and effect of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following examples are only used to explain the present invention, but not to limit the present invention.
[0023] The present invention provides a system and method (hereinafter referred to as the emergency shutdown system and emergency shutdown method) for a nuclear power plant to realize the emergency shutdown of steam turbines. Since both the machine head shutdown button and the ECP shutdown button of the present invention bypass the steam turbine control system, the present invention is implemented It can not only ensure the safe and reliable shutdown of the unit, but also meet the requirements of national regulations.
[0024] Such as figure 2 As shown, the emergency shutdown system 10 of the steam turbi...
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The invention belongs to the technical field of nuclear power and discloses a system and a method for achieving emergent shutdown of a steam turbine in a nuclear power station. The system comprises a shutdown magnetic valve controlling opening and closing of a main throttle valve of the steam turbine, a shutdown magnetic valve power supply loop for supplying power for the shutdown magnetic valve, a machine head shutdown button and an ECP shutdown button. The output end of the machine head shutdown button and the output end of the ECP shutdown button are respectively connected with the shutdown magnetic valve power supply loop. When the output end of the machine head shutdown button and/or the output end of the ECP shutdown button outputs a shutdown signal, and the shutdown magnetic valve power supply loop is disconnected and stops power supply for the shutdown magnetic valve so as to achieve emergent shutdown. In the system, the shutdown signals produced by the output ends of the machine head shutdown button and the ECP shutdown button can directly act on the shutdown magnetic valve power supply loop, so that the emergent shutdown can be ensured when two shutdown buttons are operated, and safe, reliable and economic operation of the steam turbine and the nuclear power station is ensured.
Description
technical field [0001] The invention belongs to the technical field of nuclear power and relates to the emergency shutdown of steam turbines. More specifically, the present invention relates to a shutdown button bypass control system so as to ensure that a nuclear power plant can realize an emergency shutdown of a steam turbine by operating the shutdown button. Background technique [0002] In the prior art, steam turbines and generators (TG) used in nuclear power plants are usually provided with special control systems for monitoring and controlling the steam turbines. When the steam turbine is running normally, the main steam valve needs to be automatically opened under the action of the control system, so that the main steam enters the cylinder to drive the blades to rotate and do work, and drives the generator to generate electricity. The normal speed of the full-speed machine is 3000 rpm, and the normal speed of the half-speed machine is 1500 rpm. Under emergency cond...
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Inventor 王旭峰曾彬孙兴东
Owner 中广核工程有限公司