CN215733655U - Diesel generator EPS electrical power generating system based on flywheel energy storage principle - Google Patents

Abstract

The utility model belongs to the field of electrical technology, and particularly relates to a diesel generator EPS power supply system based on a flywheel energy storage principle, wherein an input shaft of a generator is in transmission connection with an output shaft of an energy storage motor, an energy storage flywheel is arranged on the input shaft of the generator, a movable disc and a static disc of an electromagnetic clutch are respectively arranged at the end part of the input shaft of the generator and the end part of an output shaft of a diesel engine, and the electromagnetic clutch is electrically connected with a PLC (programmable logic controller). Compared with the existing electronic EPS power supply system, the electronic EPS power supply system has the advantages of simple and durable structure, small maintenance workload, low operating cost, low operating environment requirement and the like.

Description

Diesel generator EPS electrical power generating system based on flywheel energy storage principle

Technical Field

The utility model belongs to the technical field of electricity, and particularly relates to a diesel generator EPS power supply system based on a flywheel energy storage principle.

Background

The EPS Power Supply is also called fire Emergency Power Supply, and is an Emergency Power Supply adopted in important buildings for Power guarantee and fire safety.

The charging device mainly comprises an input/output unit, a charging module, a battery pack, an inverter, a monitor, an output switching device and the like. The LED lamp is widely applied to energy-saving power supply, building illumination, road traffic illumination, tunnel illumination, electric power, industrial and mining enterprises, fire elevators and the like.

When the commercial power is normal, the commercial power supplies power to an important load through an output switching device, and meanwhile, a charger charges or floats a storage battery; when the mains supply is powered off or the voltage exceeds the power supply range, the controller starts the inverter, and simultaneously, the output switching device immediately switches the mains supply state to the inverter for power supply so as to provide emergency power supply for load equipment; when the commercial power is recovered, the emergency power supply recovers to the commercial power supply.

The existing uninterruptible power supply system is basically realized by an inverter circuit formed by electric and electronic elements such as Insulated Gate Bipolar Transistors (IGBT) and the like by storing energy by a storage battery. At present, the technology of the mode is mature, the work is reliable, and the mode is widely applied to occasions such as elevators, fire fighting, emergency lighting and the like in important places, and meets the requirement of uninterrupted power supply of important loads when an external power grid is in power failure.

However, this approach also has a number of disadvantages: the method is mainly limited by the bottleneck of the existing storage battery technology, the storage battery needs to be maintained and overhauled frequently, the storage battery needs to be replaced integrally in about five years basically, and the cost is very high; in addition, the device has extremely high requirements on the operating environment, and a large-capacity air conditioner needs to be configured to meet the heat dissipation requirements of power electronic devices; the current device itself generates heat, and the power loss is large.

The utility model discloses a do not cut off power supply fuel oil unit in the utility model patent of patent number "200520050049.4", it though can realize not cutting off the power supply, nevertheless because its flywheel drives its rotation by the generator, when the external power network resumes the incoming telegram, must set up commercial power and generator power with frequency, same phase, with voltage can be incorporated into the power networks, otherwise will take place serious asynchronous parallel accident.

SUMMERY OF THE UTILITY MODEL

The utility model provides a diesel generator EPS power supply system based on a flywheel energy storage principle aiming at the problems.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a diesel generator EPS electrical power generating system based on flywheel energy storage principle, includes generator, diesel engine, energy storage flywheel, electromagnetic clutch and energy storage motor, the generator passes through generator circuit breaker QF1 and is connected with main bus MX in the power switch cabinet, the energy storage motor passes through contactor KM and energy storage motor isolation switch Q2 and is connected with main bus MX in the power switch cabinet, utility transformer TR passes through utility power inlet wire breaker QF2 and is connected with main bus MX in the power switch cabinet, generator circuit breaker QF1, contactor KM and utility power inlet wire breaker QF2 all are connected with the PLC controller, the input shaft of generator and energy storage motor's output shaft transmission are connected be provided with the energy storage flywheel on the input shaft of generator the driving disk and the static dish of electromagnetic clutch are installed respectively to the tip of generator input shaft and the tip of diesel engine output shaft, and the electromagnetic clutch is electrically connected with the PLC.

Further, a generator isolation disconnecting link Q1 is arranged between the generator and a main bus MX in the power switch cabinet.

Still further, the generator is a general alternating current generator or a direct current generator.

Further, the energy storage motor is a three-phase alternating current asynchronous motor or a single-phase alternating current motor.

Furthermore, the input shaft of the generator is connected with the output shaft of the energy storage motor through belt transmission or gear transmission.

Furthermore, the intelligent control system further comprises a touch screen, wherein the touch screen is electrically connected with the PLC, so that the running state and the fault display of each device are realized through the picture configuration, and the human-computer interface is improved.

Furthermore, the energy storage flywheel is an iron solid disc with the diameter of 1500mm, the thickness of 80mm and particularly heavy mass.

Compared with the prior art, the utility model has the following advantages:

the utility model is based on the mechanical flywheel energy storage principle, combines the PLC control technology and the touch screen human-computer interface technology, realizes the uninterrupted power system with the integration of the generator and the diesel engine, can realize the automatic starting and grid-connected operation of the diesel generator set when the external power grid loses power, and meets the practical application of an industrial field fire-fighting system, an accident lighting system, emergency maintenance and the like; compared with the existing electronic EPS power supply system, the electronic EPS power supply system has the advantages of simple and durable structure, small maintenance workload, low operation cost, low operation environment requirement and the like; the flywheel is adopted to store energy independently, the generator does not need to be connected with the mains supply in any condition, the control system is relatively simple and reliable, and meanwhile, the generator does not need to be connected with the mains supply in operation, so that the requirement on the generator is low, and any type of generator can be selected. As long as the voltage and frequency emitted can meet the load requirements.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a control circuit according to the present invention;

in the figure, a generator-1, a diesel engine-2, an energy storage flywheel-3, an electromagnetic clutch-4, a belt pulley-5, a transmission belt-6, an energy storage motor-7, a bearing seat-8, a clutch slip ring-9 and a commercial power transformer-TR are arranged.

Detailed Description

In order to further illustrate the technical solution of the present invention, the present invention is further illustrated by the following examples.

As shown in fig. 1 and fig. 2, a diesel generator EPS power supply system based on flywheel energy storage principle, includes generator 1, diesel engine 2, energy storage flywheel 3, electromagnetic clutch 4 and energy storage motor 7, generator 1 is connected with main bus MX in the power switch cabinet through generator isolation knife-switch Q1 and generator breaker QF1, energy storage motor 7 is connected with main bus MX in the power switch cabinet through contactor KM and energy storage motor isolation knife-switch Q2, utility power transformer TR is connected with main bus qfmx in the power switch cabinet through utility power incoming line breaker QF2, generator breaker 1, contactor KM and utility power incoming line breaker QF2 are all connected with the PLC controller, the input shaft of generator 1 is in transmission connection with the output shaft of energy storage motor 7, be provided with energy storage flywheel 3 on the input shaft of generator 1, when the utility power is normal, the energy storage motor 7 is driven to rotate along with the rotor of the generator 1, sufficient movement potential energy is stored, energy storage preparation is made when commercial power is lost, a movable disc and a static disc of an electromagnetic clutch 4 are respectively installed at the end part of an input shaft of the generator 1 and the end part of an output shaft of the diesel engine 2, the electromagnetic clutch 4 is electrically connected with a PLC (programmable logic controller), the PLC is also electrically connected with a touch screen, so that the running state and fault display of each device are realized through picture configuration, and a human-computer interface is improved.

The generator 1 in the above embodiment is a general-purpose ac generator or dc generator; the energy storage motor 7 is a three-phase alternating current asynchronous motor or a single-phase alternating current motor; the energy storage flywheel 3 is an iron solid disc with the diameter of 1500mm, the thickness of 80mm and particularly heavy mass; the input shaft of the generator 1 and the output shaft of the energy storage motor 7 can also be in transmission connection through a gear.

The working principle is as follows: under the normal power supply condition of the mains supply, a mains supply inlet wire breaker QF2 is closed, a generator breaker QF1 is disconnected, and a main bus MX in the power switch cabinet is powered by the mains supply. At the moment, the rotor of the generator 1 is driven to rotate by the energy storage motor through the belt pulley, and the iron energy storage flywheel 3 which coaxially operates with the generator 1 stores enough motion potential energy. Once the commercial power is lost, the PLC controller controls the contactor KM to be disconnected, the energy storage motor 7 stops running, meanwhile, the PLC controller controls the electromagnetic clutch to be automatically closed, the energy stored by the energy storage flywheel 3 before is used for generating a large torque, and the diesel engine is automatically started to run, so that the generator is continuously driven to run for power generation. Meanwhile, the PLC controls the commercial power incoming line breaker QF2 to be disconnected, the motor breaker QF1 to be closed, and the main bus MX in the power switch cabinet is powered by the generator 1, so that the purpose of uninterrupted power supply is achieved.

When the mains supply voltage is recovered to be normal, the PLC controller controls the electromagnetic clutch to be automatically switched off after short time delay, controls the motor circuit breaker QF1 to be switched off, controls the mains supply inlet wire circuit breaker QF2 to be switched on, recovers an automatic standby state, and prepares for next system power failure.

In the process, the energy storage flywheel 3 and the electromagnetic clutch 4 play an important role, the generator 1 can continue to operate by the rotation inertia of the energy storage flywheel 3 in the neutral time from the loss of the mains supply to before the diesel engine 2 is started, the rotating speed cannot be obviously changed, and the continuity of the power generation of the generator 1 and the power supply of the main bus MX in the power switch cabinet is ensured. Otherwise, a long time is needed from the start of the diesel engine 2 to the establishment of the rated voltage for driving the generator 1 to operate, which causes the power loss time of the main bus MX of the accident to be too long, and the production requirement cannot be ensured.

While there have been shown and described what are at present considered to be the essential features and advantages of the utility model, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The utility model provides a diesel generator EPS electrical power generating system based on flywheel energy storage principle which characterized in that: including generator (1), diesel engine (2), energy storage flywheel (3), electromagnetic clutch (4) and energy storage motor (7), generator (1) is connected through main generating line MX in generator circuit breaker QF1 and the power switch cabinet, energy storage motor (7) are connected with main generating line MX in the power switch cabinet through contactor KM and energy storage motor isolation switch Q2, and utility transformer TR passes through utility power inlet wire breaker QF2 and is connected with main generating line MX in the power switch cabinet, generator circuit breaker QF1, contactor KM and utility power inlet wire breaker QF2 all are connected with the PLC controller, the input shaft of generator (1) is connected with the output shaft transmission of energy storage motor (7) be provided with energy storage flywheel (3) on the input shaft of generator (1) the movable disk and the static dish of electromagnetic clutch (4) are installed respectively to the tip of generator (1) input shaft and the tip of diesel engine (2) output shaft, and the electromagnetic clutch (4) is electrically connected with the PLC.

2. The diesel generator EPS power supply system based on flywheel energy storage principle of claim 1, characterized in that: and a generator isolation disconnecting link Q1 is also arranged between the generator (1) and a main bus MX in the power switch cabinet.

3. The diesel generator EPS power supply system based on flywheel energy storage principle of claim 1, characterized in that: the generator (1) is a universal alternating current generator or a direct current generator.

4. The diesel generator EPS power supply system based on flywheel energy storage principle of claim 1, characterized in that: the energy storage motor (7) is a three-phase alternating current asynchronous motor or a single-phase alternating current motor.

5. The diesel generator EPS power supply system based on flywheel energy storage principle of claim 1, characterized in that: the input shaft of the generator (1) is connected with the output shaft of the energy storage motor (7) through belt transmission or gear transmission.

6. The diesel generator EPS power supply system based on flywheel energy storage principle of claim 1, characterized in that: the PLC is electrically connected with the touch screen, so that the running state and fault display of each device can be realized through picture configuration, and a human-computer interface is improved.

7. The diesel generator EPS power supply system based on flywheel energy storage principle of claim 1, characterized in that: the energy storage flywheel (3) is an iron solid disc with the diameter of 1500mm, the thickness of 80mm and particularly heavy mass.

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