System and method for debugging a half-speed steam turbine protection system in a nuclear power plant

Abstract

The invention discloses a system for debugging a half-speed steam turbine protection system of a nuclear power plant. The system for debugging the half-speed steam turbine protection system of the nuclear power plant comprises a simulation machine and a valve debugging device, wherein the simulation machine is connected with the steam turbine protection system and used for simulating multiple operating parameters of a steam turbine and sending the multiple operating parameters of the steam turbine to the steam turbine protection system, so that protection action of the steam turbine protection system is tested; and the valve debugging device is connected with a main steam valve of the steam turbine and used for simulating a control signal of the steam turbine protection system to the main steam valve, and whether action of the main steam valve is matched with action of the steam turbine protection system or not is tested by testing opening and closing of the main steam valve. The invention further discloses a method for debugging the half-speed steam turbine protection system of the nuclear power plant. By adoption of the system and method for debugging the half-speed steam turbine protection system of the nuclear power plant, the risks of machine tripping and reactor tripping can be lowered, and the safety and reliability of the system are improved.

Description

technical field [0001] The invention relates to the technical field of nuclear power plants, in particular to a system and method for debugging a half-speed steam turbine protection system of a nuclear power plant. Background technique [0002] The steam turbine protection system is a reliable and precise steam turbine safety protection system. When the abnormal operation of the steam turbine may endanger the safety of the steam turbine generator set, the steam turbine protection system outputs a trip signal to trip the steam turbine, close all the steam inlet valves of the steam turbine, and cut off the steam turbine inlet valve. Steam source, so that the steam turbine unit can be shut down safely, so as to finally achieve the purpose of protecting the steam turbine unit. [0003] At present, domestic large-scale thermal power generation units generally adopt an independent steam turbine protection system, also called a steam turbine emergency trip system (ETS for short). ...

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Problems solved by technology

Therefore, the above-mentioned conventional thermal power steam turbine protection system debugging scheme has the following defects: there is no complete scheme for the debugging of nuclear power plant steam turbine protection system, and the research and application of its key debugging technology is not mature; nuclear power units have special requirements for nuclear safety , has higher and stricter requirements for shutting down and shutting down, and the steam turbine protection system is an important and sensitive system of a nuclear power plant. The commissioning scheme of a conventional thermal power steam turbine does not meet the requirements of nuclear power units due to the lack of a complete commissioning and verification scheme before the steam turbine is started. Requirements for the commissioning of the steam turbine unit; in the verification of the tripping logic of the steam turbine protection system, the conventional thermal power plant does not use a full digital simulator to simulate the real operating conditions of the steam turbine, so it is impossible to verify the tripping action of the steam turbine in real operation characteristics; in the action test of the main steam cut-off valve, conventional thermal power plants simply check the valve action and closing time, without further testing the action characteristics and response speed of the valve, and have not established a complete verification program for valve performance indicators, which may It will cause the valve action to be out of tolerance when the steam turbine actually trips, which will bring huge potential safety hazards

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