Switching power generation system for emergency diesel generator set

Abstract

The utility model relates to the field of diesel generating sets, in particular to a switching power generation system for an emergency diesel generating set, which comprises a control module, a storage battery pack, an emergency manual knob, an emergency manual relay, a starting relay and an oil supply relay which are connected in parallel, and two ends of the parallel connection are respectively connected with a cathode of the storage battery pack and the control module. One end of the shutdown operation starting knob is connected with the positive electrode of the storage battery pack, and the other end of the shutdown operation starting knob is connected with the negative electrode of the storage battery pack and the control module. The switching power generation system for the emergency diesel generator set can be started through the control module, when the control module breaks down, the set can be started to supply power to emergency electric equipment by throwing away the control module in an emergency manual state, and the switching power generation system is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the field of diesel generator sets, in particular to a switching power generation system for emergency diesel generator sets. Background Art

[0002] In recent years, emergency diesel generator sets have been widely used in data centers, nuclear power, power plants, military base support and intelligent buildings, etc., to improve the stability and reliability of emergency power supply systems and avoid affecting the operation of electrical equipment due to emergency power shortages. At present, diesel generator sets are basically started through control modules, and the parallel operation of multiple units is achieved through analog voltage and speed regulation of the control module. Reference application number CN201420860688.6, named a Chinese utility model patent for a redundant controller switching device for parallel emergency diesel generator sets. However, the current nuclear power, military base support power station and other fields have relatively high requirements for emergency power supply reliability. When the unit control module fails or is damaged, if emergency power is needed, the unit cannot be started at this time, and the losses and impacts caused are very huge. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a stable and reliable switching power generation system for emergency diesel generator sets.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a switching power generation system for an emergency diesel generator set, including a control module and a battery pack, the two ends of the emergency manual knob, the emergency manual relay, the starting relay and the oil supply relay after being connected in parallel are respectively connected to the negative pole of the battery pack and the control module, one end of the shutdown start knob is connected to the positive pole of the battery pack, and the other end of the shutdown start knob is respectively connected to the negative pole of the battery pack and the control module, and the controller, the shutdown start knob and the negative pole of the battery pack are all connected to the engine body.

[0005] Furthermore, the step-down relay, step-up relay, speed reduction relay and speed increase relay are respectively connected to the negative pole of the battery pack and the control module, the step-down relay and the step-up relay are each connected to the positive pole of the battery pack through a set of voltage regulating knobs, the speed reduction relay and the speed increase relay are each connected to the positive pole of the battery pack through a set of speed regulating knobs, the voltage regulating potentiometer is respectively connected to the step-down relay, the step-up relay and the generator voltage regulating board, and the speed regulating potentiometer is respectively connected to the speed reduction relay, the speed increase relay and the engine speed regulating board.

[0006] The beneficial effects of the utility model are as follows: the unit is normally started and stopped by the module control unit. When the unit module fails, the unit is controlled by operating the function buttons or switches on the control cabinet panel in the emergency manual state. In this state, the unit only maintains and protects the normal operation protection function of the engine through the external reverse power protection module and the security module, and the protection function of the unit module is invalid. The switching power generation system for the emergency diesel generator set provided by the utility model can be started by the control module. When the control module fails, the unit can be started to supply power to the emergency power equipment by throwing away the control module in the emergency manual state, which is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A schematic diagram of the structure of a switching power generation system for an emergency diesel generator set;

[0008] Figure 2 Another structural schematic diagram of a switching power generation system for an emergency diesel generator set;

[0009] Figure 3 Another structural schematic diagram of a switching power generation system for an emergency diesel generator set;

[0010] Figure 4 Another structural schematic diagram of a switching power generation system for an emergency diesel generator set;

[0011] Description of labels:

[0012] 1. Engine body; 2. Control module; 3. Emergency manual knob; 4. Emergency manual relay; 5. Start relay; 6. Stop / Run / Start knob; 7. Fuel supply relay; 8. Battery pack; 9. Voltage regulator potentiometer; 10. Generator voltage regulator board; 11. Speed ​​regulator potentiometer; 12. Engine speed regulator board; 13. Step-down relay; 14. Step-up relay; 15. Voltage regulator knob; 16. Step-down relay; 17. Step-up relay; 18. Speed ​​knob. DETAILED DESCRIPTION

[0013] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0014] The utility model provides a switching power generation system for an emergency diesel generator set, in order to meet the application occasions where the diesel generator set needs emergency starting power supply when a unit module fails.

[0015] Please refer to Figures 1 to 4As shown, the utility model is a switching power generation system for an emergency diesel generator set, including a control module 2 and a battery pack 8, the two ends of the emergency manual knob 3, the emergency manual relay 4, the start relay 5 and the oil supply relay 7 after being connected in parallel are respectively connected to the negative electrode of the battery pack 8 and the control module 2, one end of the shutdown start knob is connected to the positive electrode of the battery pack 8, and the other end of the shutdown start knob is respectively connected to the negative electrode of the battery pack 8 and the control module 2, and the controller, the shutdown start knob and the negative electrode of the battery pack 8 are all connected to the engine body 1.

[0016] From the above description, it can be seen that the beneficial effects of the utility model are: under normal circumstances, the unit controls the start and stop of the unit through the module. When the unit module fails, in the emergency manual state, the unit is controlled by operating the various function buttons or switches on the control cabinet panel. In this state, the unit only maintains and protects the normal operation protection function of the engine through the external reverse power protection module and security module, and the protection function of the unit module is invalid.

[0017] In an optional embodiment, the step-down relay 13, the step-up relay 14, the speed reduction relay 16 and the speed increase relay 17 are respectively connected to the negative pole of the battery pack 8 and the control module 2, the step-down relay 13 and the step-up relay 14 are each connected to the positive pole of the battery pack 8 through a set of voltage regulating knobs 15, the speed reduction relay 16 and the speed increase relay 17 are each connected to the positive pole of the battery pack 8 through a set of speed regulating knobs 18, the voltage regulating potentiometer 9 is respectively connected to the step-down relay 13, the step-up relay 14 and the generator voltage regulating board 10, and the speed regulating potentiometer 11 is respectively connected to the speed reduction relay 16, the speed increase relay 17 and the engine speed regulating board 12.

[0018] From the above description, it can be seen that under normal circumstances, the unit module outputs switching pulse speed increase and pulse speed decrease signals, and then converts the switching signals into analog signals through the speed and voltage regulation electronic potentiometers to achieve speed regulation and voltage regulation functions; when the unit module fails, in the emergency manual state, the speed and voltage regulation lifting knob is used, and then the speed and voltage regulation electronic potentiometer converts the switching signals given by the lifting knob into analog signals to achieve speed regulation and voltage regulation functions; thereby realizing the automatic and manual parallel operation of multiple units.

[0019] The working principle of the dual switching power generation system for starting and voltage and speed regulation is as follows:

[0020] The working process of the start switching is that the control module 2 is in manual mode, and the battery pack 8 supplies power to the control module 2 and other DC24V equipment. The module / emergency manual knob 3 is turned to the module position. By pressing the start button on the control module 2, the control module 2 controls the start relay 5 and the fuel supply relay 7 to output power, and the normally open auxiliary contact of the start relay 5 is closed to control the starter motor contactor of the engine to be energized. At this time, the motor starts to crank and drive the engine to run at high speed. The starter motor will automatically disengage when it reaches a certain speed. The engine burns diesel to rotate the crankshaft and drive the generator to generate electricity. When the control module 2 fails, the unit cannot be started by the control module 2. In order to confirm the rapid power supply in an emergency, the module / emergency manual knob 3 is turned to the emergency manual position to supply power to the control module. 2 an emergency manual input signal, at this time the control module 2 controls the emergency manual relay 4 output, the normally closed auxiliary contact of the emergency manual relay 4 cuts off the module control oil supply relay 7 output, at this time the control module 2 only displays the operating parameters of the generator set, and cannot control the operation of the generator set. At this time, it is necessary to turn the stop / run / start knob 6 to the start position to control the start relay 5 to be energized, the normally open auxiliary contact of the start relay 5 is closed, and the starter motor contactor of the engine is energized. At this time, the motor starts to crank and drive the engine to run at high speed. The starter motor will automatically disengage when it reaches a certain speed. After the starter motor is disengaged, turn the stop / run / start knob 6 to the run position, the oil supply relay 7 is energized and output, and the oil valve is controlled to work to supply fuel to the engine, thereby realizing the emergency manual of the generator set.

[0021] The working process of voltage and speed regulation switching is to supply power to the control module 2 and other DC24V devices through the battery pack 8. When the generator set is successfully started through the control module 2, multiple generator sets need to be automatically connected in parallel. The speed reduction relay 16, speed increase relay 17, voltage reduction relay 13, and voltage increase relay 14 are controlled by the control module 2 to output the pulse signal of the switching quantity. The pulse signal of the switching quantity is converted into an analog voltage signal acceptable to the generator voltage regulating board 10 and the engine speed regulating board 12 through the speed regulating potentiometer 11 and the voltage regulating potentiometer 9, thereby realizing automatic voltage and speed regulation of the generator set through the control module 2. When the control module 2 fails, the module / emergency manual knob 3 is turned to emergency manual. At this time, the control module 2 can only display the operating parameters of the generator set and cannot control the output; the start of the unit is controlled by the stop / run / start knob 6. After the unit is successfully started, if multiple units need to be manually connected in parallel, the speed reduction relay 16, the speed increase relay 17, the voltage reduction relay 13, and the voltage increase relay 14 are energized at intervals through the up and down gears of the voltage regulating knob 15 and the speed regulating knob 18. The pulse signal of the switch quantity is converted into an analog voltage signal that can be accepted by the generator voltage regulating board 10 and the engine speed regulating board 12 through the speed regulating potentiometer 11 and the voltage regulating potentiometer 9, thereby realizing manual voltage and speed regulation of the generator set through the voltage regulating knob 15 and the speed regulating knob 18.

[0022] Please refer to Figures 1 to 4 As shown, the first embodiment of the utility model is: a switching power generation system for an emergency diesel generator set, including a control module 2 and a battery pack 8, the two ends of the emergency manual knob 3, the emergency manual relay 4, the start relay 5 and the oil supply relay 7 are connected in parallel and are respectively connected to the negative pole of the battery pack 8 and the control module 2, one end of the shutdown start knob is connected to the positive pole of the battery pack 8, and the other end of the shutdown start knob is respectively connected to the negative pole of the battery pack 8 and the control module 2, and the controller, the shutdown start knob and the negative pole of the battery pack 8 are all connected to the engine body 1. The step-down relay 13, the step-up relay 14, the speed reduction relay 16 and the speed increase relay 17 are respectively connected to the negative pole of the battery pack 8 and the control module 2, the step-down relay 13 and the step-up relay 14 are respectively connected to the positive pole of the battery pack 8 through a set of voltage regulating knobs 15, the speed reduction relay 16 and the speed increase relay 17 are respectively connected to the positive pole of the battery pack 8 through a set of speed regulating knobs 18, the voltage regulating potentiometer 9 is respectively connected to the step-down relay 13, the step-up relay 14 and the generator voltage regulating board 10, and the speed regulating potentiometer 11 is respectively connected to the speed reduction relay 16, the speed increase relay 17 and the engine speed regulating board 12.

[0023] To sum up, the switching power generation system for emergency diesel generator sets provided by the utility model controls the start and stop, voltage and speed regulation and paralleling functions of the set through modules under normal circumstances. When a fault occurs in the set module, the set is controlled by operating the function buttons or switches on the control cabinet panel in the emergency manual state. In this state, the set only maintains and protects the normal operation protection function of the engine through the external reverse power protection module and the security module, and the protection function of the set module is invalid; under normal circumstances, the set module outputs switch pulse speed increase and pulse speed decrease signals, and then converts the switch signal into an analog signal through the speed and voltage regulating electronic potentiometer to realize the speed and voltage regulation function; when a fault occurs in the set module, in the emergency manual state, the speed and voltage regulation lifting knob is used, and then the switch signal given by the lifting knob is converted into an analog signal through the speed and voltage regulating electronic potentiometer to realize the speed and voltage regulation function; thereby realizing the automatic and manual paralleling function of multiple sets.

[0024] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A switching power generation system for an emergency diesel generator set, characterized in that: It includes a control module and a battery pack. The two ends of the emergency manual knob, emergency manual relay, start relay and fuel supply relay are connected in parallel to the negative electrode of the battery pack and the control module respectively. One end of the shutdown start knob is connected to the positive electrode of the battery pack, and the other end of the shutdown start knob is connected to the negative electrode of the battery pack and the control module respectively. The controller, the shutdown start knob and the negative electrode of the battery pack are all connected to the engine body.

2. The switching power generation system for emergency diesel generator sets according to claim 1, characterized in that: The step-down relay, step-up relay, speed reduction relay and speed increase relay are connected to the negative pole of the battery pack and the control module respectively, the step-down relay and the step-up relay are each connected to the positive pole of the battery pack through a set of voltage regulating knobs, the speed reduction relay and the speed increase relay are each connected to the positive pole of the battery pack through a set of speed regulating knobs, the voltage regulating potentiometer is respectively connected to the step-down relay, the step-up relay and the generator voltage regulating board, and the speed regulating potentiometer is respectively connected to the speed reduction relay, the speed increase relay and the engine speed regulating board.

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