Control system and control method for oil circuit of upper charging pump in nuclear power plant

Abstract

The invention discloses a nuclear power plant charging pump oil circuit control system and a control method thereof. The nuclear power plant charging pump oil circuit control system comprises a charging pump, a charging pump oil circuit, an auxiliary oil pump, multiple pressure switches arranged on the charging pump oil circuit and a main controller; the pressure switches can trigger correspondingswitching value signals according to set conditions; and the main controller comprises a first front delay module, a charging pump starting state signal collecting module, a first signal collecting module, a first judging module and a stopping auxiliary oil pump module. According to the nuclear power plant charging pump oil circuit control system and the control method thereof, in the charging pump starting process, through delay and pulse control design of charging pump starting state signals, the oil pressure established by the auxiliary oil pump is more stable; and in addition, it can be effectively guaranteed that the charging pump is lubricated more fully in the starting stage, and repeated starting and stopping of the auxiliary oil pump can be avoided.

Description

technical field [0001] The invention relates to the technical field of an upper charge pump, in particular to a control system and a control method for an oil circuit of an upper charge pump in a nuclear power plant. Background technique [0002] The top charge pump is the core equipment of the chemical and volume control system of the important auxiliary system of the primary circuit of the nuclear power plant. The safe operation of the charging pump requires a reliable oil circuit system to guarantee. Before starting the top charging pump, the auxiliary oil pump must be started first, and the top charging pump can only be started after the lubricating oil pressure is stable; The auxiliary oil pump is automatically shut down; at present, when the top charging pump is started, the start signal of the top charging pump and the pressure signal of the pressure switch of the oil circuit will make the auxiliary oil pump stop immediately. At this time, the coupling oil pump has ...

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Problems solved by technology

At this time, the coupling oil pump has not been running stably, and the auxiliary oil pump has stopped, which makes the lubrication of the upper charging pump insufficient during the start-up process.

[0003] During the operation of the charging pump, when the coupling oil pump fails, it is easy to trigger the start of the auxiliary oil pump, or when the RRA automatic replenishment signal triggers the start of the auxiliary oil pump; after the oil pressure rises rapidly, it will trigger the shutdown of the auxiliary oil pump, and the auxiliary oil pump will Repeated start and stop occurs, and frequent repeated start and stop is not only not conducive to the oil pressure stability of the oil circuit, but may also cause damage to the auxiliary oil pump

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