CN114954039A

CN114954039A - Power control system with overspeed protection, method and storage medium thereof

Info

Publication number: CN114954039A
Application number: CN202210545320.XA
Authority: CN
Inventors: 陈强; 李道航
Original assignee: Zhaoqing Xingxing New Energy Technology Co ltd
Current assignee: Zhaoqing Xingxing New Energy Technology Co ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-08-30

Abstract

The invention provides an electric power control system with overspeed protection, a method and a storage medium thereof, wherein the electric power control system with overspeed protection comprises a driving unit, a control unit and a control unit, wherein the driving unit comprises an engine and a generator; the power utilization device is connected with the output end of the generator and comprises a motor, and the motor is used for driving an external power load; one end of the energy consumption branch is connected to the driving unit, and the other end of the energy consumption branch is connected to the electric device through an energy consumer; and the controller is used for acquiring the state of the external power load and the working state of the driving unit, and is also used for communicating the driving unit with the energy consumption branch when the external power load is removed and the working state of the driving unit is abnormal, wherein the abnormal working state is at least one of the abnormal increase of the rotating speed of the engine, the rotating speed of the generator and the output voltage of the generator. According to the scheme of the embodiment of the invention, the stability and the safety of the power control system can be improved.

Description

Power control system with overspeed protection, method and storage medium thereof

Technical Field

The invention relates to the technical field of power systems, in particular to a power control system with overspeed protection, a method and a storage medium thereof.

Background

In recent years, modern electric equipment has made higher and higher requirements on electric energy quality and power supply reliability, and low-voltage direct-current integrated power systems have been gradually popularized and applied to the fields of ship power, automobile power and industrial and civil power due to the advantages of high power density, good fuel economy, convenience in energy storage access, simple and flexible networking control and the like.

However, the existing generator sets are difficult to form a power driving system in a complex driving environment, such as a ship full-electric driving power system, a large-scale load mine vehicle and other occasions with steep power load gradient, so that the problems of insufficient power or excessive power waste of the generator sets and the like easily occur; in addition, when the generator set is in grid-connected operation, if load sudden change occurs, an Over Speed protection system (0 PC) of the generator set cannot control the rotating Speed of an engine in time, so that the generator generates harmful sudden change voltage, and in severe cases, a rectifier device or the generator can be burnt out, so that the safety of the generator set is influenced.

Disclosure of Invention

The present invention is directed to solve at least one of the problems of the prior art, and provides a power control system with overspeed protection, a method thereof, and a storage medium thereof, which can improve the stability and safety of the power control system.

In a first aspect, the present invention provides a power control system with overspeed protection, comprising:

the driving unit comprises an engine and a generator, and the engine is used for driving the generator to generate electricity;

the power utilization device is connected with the output end of the generator and comprises an electric motor, and the electric motor is used for driving an external power load;

one end of the energy consumption branch is connected to the driving unit, and the other end of the energy consumption branch is connected to the electric device through an energy consumer;

and the controller is used for acquiring the state of the external power load and the working state of the driving unit, and is also used for communicating the driving unit with the energy consumption branch when the external power load is removed and the working state of the driving unit is abnormal, wherein the abnormal working state is at least one of the abnormal rise of the rotating speed of the engine, the rotating speed of the generator and the output voltage of the generator.

According to the power control system with overspeed protection provided by the embodiment of the invention, at least the following beneficial effects are achieved: firstly, the engine and the generator in the driving unit are used for electric drive, the engine drives the generator to generate electricity and supply electricity for the electricity utilization device, so that the motor in the electricity utilization device can drive an external power load, secondly, the power control system also comprises an energy consumption branch circuit, the energy consumption branch circuit is connected between the driving unit and the electricity utilization device and can reduce the output current and the output voltage of the driving unit, so that the generator is prevented from being burnt due to sudden change of load, finally, the controller acquires the state of the external power load and a working device of the driving unit and is used for communicating the driving unit with the energy consumption branch circuit when the sudden change of the external power load occurs and the working state of the driving unit is abnormal, wherein the abnormal working state is at least one of the abnormal rising of the rotating speed of the engine, the rotating speed of the generator and the output voltage of the generator, the controller realizes the protection of the power control system by controlling the connection of the energy consumption branch, improves the stability of the power control system and avoids the damage of the generator due to sudden load change or abnormal current.

According to some embodiments of the invention, the power supply system further comprises an induction unit for inducing the working state of the driving unit, wherein the induction unit comprises a first rotation speed sensor for measuring the rotation speed of the engine, a second rotation speed sensor for measuring the rotation speed of the generator and a voltage sensor for measuring the output voltage of the generator, and whether the energy consumption branch needs to be connected or not is judged by measuring the rotation speeds of the engine and the generator.

According to some embodiments of the present invention, the power consumption device further comprises an electric control switch, the electric control switch is connected in parallel with the power consumption branch, and the electric control switch is disposed between the driving unit and the power consumption device, so as to facilitate communication between the driving unit and the power consumption branch, thereby realizing adjustment of the output voltage of the driving unit.

According to some embodiments of the present invention, the power supply further includes a selection switch, where the selection switch includes a first selection end and a second selection end, the first selection end is connected to the power consumption device, and the second selection end is connected to the power consumption branch, so as to facilitate switching of the power consumption branch.

According to some embodiments of the present invention, the driving unit further includes an inverter for converting current, the inverter being disposed between the generator and the motor, and converting alternating current of the driving unit into direct current through the inverter, thereby improving accuracy of control.

According to some embodiments of the present invention, the driving unit, the motor, the energy consumption branch and the load unit are connected by a signal bus, so as to facilitate the transmission and reception of signals, thereby implementing the control of the driving unit.

According to some embodiments of the invention, the energy consumer comprises a capacitor and/or a heating resistor, and the output voltage of the generator is reduced, so that the power generation control system is protected.

In a second aspect, the present invention provides a power control method applied to a power control system with overspeed protection, including:

the motor is connected with the driving unit and is used for driving an external power load;

an energy consumption branch, one end of which is connected to the driving unit and the other end of which is connected to an electric device through an energy consumer, wherein the electric device comprises the motor;

the power control method includes:

acquiring the state of the external power load and the working state of the driving unit;

when the external power load is removed and the working state of the driving unit is abnormal, communicating the driving unit with the energy consumption branch, wherein the abnormal working state comprises an abnormal rise of any one parameter of the rotating speed of the engine, the rotating speed of the generator and the output voltage of the generator.

According to the power control method provided by the embodiment of the invention, at least the following beneficial effects are achieved: the method comprises the steps of judging whether a driving unit needs to be communicated with an energy consumption branch circuit or not by obtaining the state of an external power load and the working state of the driving unit, and communicating the driving unit with the energy consumption branch circuit when the external power load is removed and the working state of the driving unit is abnormal, wherein the working state is that at least one of the rotating speed of an engine, the rotating speed of a generator and the output voltage of the generator is abnormally increased, so that the output voltage of the generator is reduced, the protection of a power control system is realized, the stability of the power control system is improved, and the generator is prevented from being damaged due to sudden load change or abnormal current.

According to some embodiments of the invention, after communicating the driving unit with the energy consuming branch, further comprising: and reducing the rotating speed of the engine and/or reducing the rotating speed of the generator, and reducing the rotating speed of the engine and the rotating speed of the generator so as to avoid overspeed operation of the generator and increase of output voltage.

In a third aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform a power control method according to the second aspect.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a block diagram of a power control system with overspeed protection according to one embodiment of the present invention;

FIG. 2 is a block diagram of a power control system with overspeed protection according to another embodiment of the present invention;

FIG. 3 is a flow chart of a power control method provided by one embodiment of the present invention;

fig. 4 is a schematic structural diagram of a power control apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that in the description of the embodiments of the present invention, the terms "first", "second", and the like in the description and the claims and in the drawings described above are used for distinguishing similar objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the precedence of the technical features indicated. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Although functional blocks may be partitioned in a schematic diagram of an apparatus, with a logical order shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the partitioning of blocks in the apparatus, or in the flowchart.

In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The invention provides an electric power control system with overspeed protection, a method and a storage medium thereof, wherein firstly, the engine and the generator in a driving unit are used for electric power driving, the engine drives the generator to generate electricity to supply power for an electric device, so that a motor in the electric device can drive an external power load, secondly, the electric power control system also comprises an energy consumption branch which is connected between the driving unit and the electric device and can reduce the output current and the output voltage of the driving unit, so as to avoid the burning of the generator caused by sudden load change, and finally, a controller acquires the state of the external power load and a working device of the driving unit and is used for communicating the driving unit with the energy consumption branch when the sudden change of the external power load occurs and the working state of the driving unit is abnormal, wherein the abnormal working state is the rotating speed, the rotating speed and the rotating speed of the engine, At least one of the rotating speed of the generator and the output voltage of the generator rises abnormally, the controller controls the connection of the energy consumption branch circuit to protect the power control system, the stability of the power control system is improved, and the generator is prevented from being damaged due to sudden load change or abnormal current.

The embodiments of the present invention will be further explained with reference to the drawings.

1-2, FIG. 1 is a block diagram of a power control system with overspeed protection according to one embodiment of the present invention.

In the example of fig. 1, the control system 100 includes, but is not limited to: the driving unit 300, the powered device 400, the energy consumption branch 500 and the controller 600.

In one embodiment, the driving unit 300 includes an engine 310 and a generator 320, and the engine 310 is used for driving the generator 320 to generate electricity, so as to provide electric energy for the electric device 400.

It should be noted that, when the generator 320 generates electricity, a part of the generated electric energy is stored in the power battery and another part of the generated electric energy is used by the power supply device 400, the other part of the generated electric energy is supplied by the power battery in the control system 100 from the generator 320 in the driving unit 300.

In one embodiment, the power consuming device 400 is connected to the output of the generator 320 to obtain the electric power generated by the driving unit 300, and the power consuming device 400 includes a motor 410 for driving the external power load 700 and other power consuming devices.

In an embodiment, the energy consumption branch 500, one end of the energy consumption branch 500 is connected to the driving unit 300, and the other end of the energy consumption branch 500 is connected to the electric device 400 through an energy consumer, and the energy consumption branch 500 is disposed between the driving unit 300 and the electric device 400, so as to adjust the output voltage of the driving unit 300 and protect the electric device 400.

In an embodiment, the controller 600 is configured to obtain a state of the external power load 700 and an operating state of the driving unit 300, and further configured to determine whether the driving unit 300 needs to be communicated with the energy consumption branch 500 according to the state of the external power load 700 and the operating state of the driving unit 300, and communicate the driving unit 300 with the energy consumption branch 500 when the external power load 700 is removed and the operating state of the driving unit 300 is abnormal, where the abnormal operating state is at least one of an abnormal increase in a rotation speed of the engine 310, a rotation speed of the generator 320, and an abnormal output voltage of the generator 320, and the controller 600 controls the connection of the energy consumption branch 500 so as to protect the power control system 100, improve stability of the power control system 100, and prevent the generator 320 from being damaged due to sudden load change or abnormal current.

In an embodiment, the sensing unit 800 is further included for sensing an operating state of the driving unit 300, and the sensing unit 800 includes a first speed sensor for measuring a speed of the engine 310, a second speed sensor for measuring a speed of the generator 320, and a voltage sensor for measuring an output voltage of the generator 320, so as to facilitate determining whether the energy consumption branch 500 needs to be connected by measuring the speeds of the engine 310 and the generator 320.

It should be noted that the first rotation speed sensor and the second rotation speed sensor may be a vibration speed sensor, a linear velocity sensor, a magnetoelectric sensor, an acceleration sensor, or the like, and the embodiment is not particularly limited.

In an embodiment, the driving device further includes an electric control switch, the electric control switch is connected in parallel with the energy consumption branch 500, and the electric control switch is disposed between the driving unit 300 and the electric device 400, so that the driving unit 300 is conveniently communicated with the energy consumption branch 500, thereby adjusting the output voltage of the driving unit 300.

It should be noted that the electronic control switch may be an isolating switch, a button switch, or an isolating switch, and the embodiment is not particularly limited.

In an embodiment, the energy consumption control circuit further includes a selection switch, where the selection switch includes a first selection terminal and a second selection terminal, the first selection terminal is connected to the electric device 400, and the second selection terminal is connected to the energy consumption branch 500, so as to facilitate switching of the energy consumption branch 500.

Referring to fig. 2, fig. 2 is a schematic diagram of a framework of a power control system 100 with overspeed protection according to another embodiment of the present invention.

In an embodiment, the driving unit 300 further includes an inverter 330 for converting current, the inverter 330 is disposed between the generator 320 and the motor to convert the alternating current of the driving unit 300 into the direct current through the inverter 330, thereby improving the accuracy of the control.

It should be noted that, the current generated by the generator 320 in the driving unit 300 is ac, and the current stored in the power battery is dc, so the inverter 330 converts the ac generated by the generator 320 in the driving unit 300 into dc, thereby improving the accuracy and safety of the control system 100.

In one embodiment, the driving unit 300, the motor, the energy consumption branch 500 and the load unit are connected through a signal bus, so as to facilitate the transmission and reception of signals, thereby implementing the control of the driving unit 300.

In the control system 100, the engine 310, the generator 320, and the inverter 330 in the drive unit 300 are connected by a power bus, and the drive unit 300, the controller 600, the energy consumer, and the electric device 400 are also connected by a power bus.

In one embodiment, the energy consumer includes a capacitor and/or a heat-generating resistor, which reduces the output voltage of the generator 320, thereby protecting the power generation control system 100.

It should be noted that, when the output voltage of the driving unit 300 becomes larger, the controller 600 connects the energy consumer to the output end of the driving unit 300, and the output voltage of the driving unit 300 is reduced by using the capacitor or the resistor of the energy consumer. For example, when the energy consumer is a heating resistor, the energy consumer reduces the voltage value by sharing the output voltage of the driving unit 300, and consumes a part of the output power of the driving unit 300, thereby preventing the electric device 400 from being damaged.

It can be understood that, when the controller 600 detects that the external power load 700 is removed and the operating state of the driving unit 300 is abnormal, the driving unit 300 is communicated with the energy consumption branch 500, and the energy consumption device adjusts the output voltage of the driving unit 300 to reduce the output voltage, so as to adjust the driving unit 300, thereby protecting the electric device 400.

In one embodiment, the controller 600 is further configured to adjust the rotation speeds of the engine 310 and the generator 320, and when the rotation speed of the engine 310 or the generator 320 abnormally increases, which results in the output voltage of the generator 320 increasing, the controller 600 adjusts the output voltage by controlling the energy consumer, and also reduces the rotation speeds of the engine 310 and the generator 320, which results in the rotation speeds of the generator and the engine 310 returning to normal.

Various embodiments of the power control method of the present invention are proposed based on the structure of the control system framework described above.

As shown in fig. 3, fig. 3 is a flowchart of a power control method according to an embodiment of the present invention, which may be applied to, but is not limited to, a controller in a system architecture as shown in the embodiment of fig. 1, and the power control method includes, but is not limited to, step S100 and step S200.

Step S100: acquiring the state of an external power load and the working state of a driving unit;

step S200: when the external power load is removed and the working state of the driving unit is abnormal, the driving unit is communicated with the energy consumption branch.

The abnormal operating state includes an abnormal increase in any one of the engine speed, the generator speed, and the generator output voltage.

In an embodiment, whether the driving unit needs to be communicated with the energy consumption branch is determined by obtaining a state of an external power load and a working state of the driving unit, when the external power load is removed and the working state of the driving unit is abnormal, wherein the working state is that at least one of a rotating speed of an engine, a rotating speed of a generator and an output voltage of the generator is abnormally increased, the driving unit is communicated with the energy consumption branch, so that the output voltage of the generator is reduced, the protection of the power control system 100 is realized, the stability of the power control system is improved, and the generator is prevented from being damaged due to sudden load change or current abnormality.

In an embodiment, after the driving unit is communicated with the energy consumption branch, the method further includes: the rotating speed of the engine and/or the rotating speed of the generator are reduced, and the generator overspeed operation or the engine and overspeed operation are avoided to cause the output voltage to rise by reducing the rotating speed of the engine and the rotating speed of the generator.

The rotating speed of the engine or the generator is adjusted by the controller, wherein the rotating speed of the engine or the generator can be measured by the rotating speed controller or the rotating speed control chip, and when the rotating speed of the engine or the generator exceeds a certain preset threshold, the engine or the generator is controlled to reduce the rotating speed, so that the rotating speed adjustment of the engine or the generator is realized.

It can be understood that, when the external power load is removed and the operating state of the driving unit is abnormal, and the driving unit is communicated with the energy consumption branch, the power control method further comprises reducing the rotation speed of the generator and the rotation speed of the engine, so as to reduce the output voltage of the generator by reducing the rotation speeds of the engine and the generator, return the rotation speeds of the engine and the generator to normal, and avoid the electric device from being damaged due to overlarge voltage.

In addition, referring to fig. 4, an embodiment of the present invention further provides a power control apparatus 200, where the power control apparatus 200 includes a memory 210, a processor 220, and a computer program stored on the memory 210 and executable on the processor 220.

The processor 220 and memory 210 may be connected by a bus or other means.

The memory 210, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. Further, the memory 210 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 210 may optionally include memory located remotely from the processor 220, and such remote memory may be coupled to the processor 220 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The above described embodiments are merely illustrative, wherein elements illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Furthermore, an embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions, which are executed by a processor or a controller, for example, by a processor in the above-mentioned device embodiment, and can make the above-mentioned processor execute the control method in the above-mentioned embodiment, for example, execute the above-mentioned method steps S100 to S200 in fig. 3.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are to be included within the scope of the present invention defined by the appended claims.

Claims

1. An electrical power control system with overspeed protection, comprising:

the power utilization device is connected with the output end of the generator and comprises a motor, and the motor is used for driving an external power load;

2. The power control system with overspeed protection according to claim 1, further comprising an induction unit for inducing an operating state of said drive unit, said induction unit including a first speed sensor for measuring a speed of rotation of said engine, a second speed sensor for measuring a speed of rotation of said generator, and a voltage sensor for measuring an output voltage of said generator.

3. The power control system with overspeed protection according to claim 1, further comprising an electrically controlled switch connected in parallel with said energy consuming branch, said electrically controlled switch being disposed between said drive unit and said electric consumer.

4. The power control system with overspeed protection according to claim 1, further comprising a selector switch, said selector switch including a first selector terminal and a second selector terminal, said first selector terminal being connected to said powered device, said second selector terminal being connected to said energy consuming branch.

5. The power control system with overspeed protection according to claim 1, wherein said drive unit further includes an inverter for converting current, said inverter being disposed between said generator and said motor.

6. The power control system with overspeed protection of claim 1 wherein said drive unit, said electric motor, said energy consuming branch and said load unit are connected by a signal bus.

7. The power control system with overspeed protection according to claim 1, wherein said energy consumer comprises a capacitor and/or a heat generating resistor.

8. A power control method is applied to a power control system with overspeed protection, and is characterized by comprising the following steps:

the power control method includes:

when the external power load is removed and the working state of the driving unit is abnormal, communicating the driving unit with the energy consumption branch, wherein the abnormal working state comprises the abnormal rise of any one parameter of the rotating speed of the engine, the rotating speed of the generator and the output voltage of the generator.

9. The power control method of claim 8, further comprising, after communicating the drive unit with the energy consuming branch:

and/or reducing the rotating speed of the engine and/or reducing the rotating speed of the generator.

10. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the power control method according to any one of claims 8 to 9.