Control system and method for skid-mounted type hydrogen injection device

Abstract

The invention discloses a control system and method for a skid-mounted type hydrogen injection device. The control system comprises a process controller and a safety controller. The process controller is connected to a starting button, a pressure sensor and a temperature sensor, receives signals of the starting button, the pressure sensor and the temperature sensor and is connected to a compressor, a cooling fan, a circulation water pump and a valve to control the compressor, the cooling fan, the circulation water pump and the valve to work. The safety controller is connected to an emergency stop signal detecting module, a hydrogen leaking detecting module and a fire detecting module, receives signals of the emergency stop signal detecting module, the hydrogen leaking detecting module and the fire detecting module and is connected to the process controller, the compressor, the valve, an acousto-optic alarming device and a display device to transmit control signals. The control system is provided with the two controllers responsible for process control and safety control correspondingly, and the priority of the safety controller is higher than that of the process controller, so that safety operation of the hydrogen injection device is guaranteed.

Description

technical field [0001] The application belongs to the technical field of new energy, and in particular relates to a control system and method of a skid-mounted hydrogen filling device. Background technique [0002] With the support of national policies, the application of hydrogen energy has developed rapidly. Fuel cell vehicles have begun to be used in the market. The demand for hydrogen refueling devices is increasing. Hydrogen is a flammable and explosive gas, so hydrogen refueling devices must operate safely and reliably. System design is particularly important. [0003] Although the current domestic skid-mounted hydrogenation device control system design can meet the normal hydrogenation function, there are deficiencies in safety and use, which are mainly reflected in the following aspects: [0004] 1. The control system only has a set of controllers, which are responsible for both process control and safety control. However, when the controller handles process control...

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Problems solved by technology

[0004] 1. The control system only has a set of controllers, which are responsible for both process control and safety control. However, when the controller handles process control, there are many signal types, large data volumes, frequent actions, and easy crashes or failures. At this time, the hydrogenation device The safety signal is in a non-monitoring state, which may cause great safety hazards or lead to safety accidents

[0005] 2. The control system control cabinet is non-explosion-proof design, placed in the control room, and connected to the hydrogenation device through cables, which increases cable costs and on-site installation time

[0006] 3. The safety control loop does not consider the safety integrity level, and there is a risk of safety accidents due to functional problems of the components themselves

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