CN110027443A - Shaft end electrical power generators energy storage for power supply system and its method of supplying power to - Google Patents

Abstract

The invention provides a shaft-end generator power generation energy storage power supply system and a power supply method thereof; comprising a shaft-end generator, a rectifier, an energy storage device, an inverter and a PLC controller; the shaft-end generator is driven by a vehicle axle to generate electric energy supply Rectifier, the rectifier sends the current to the energy storage device for power supply and/or directly to the inverter; the PLC controller switches the power supply condition in real time according to the collected energy information of the energy storage device; when the energy storage device meets the power load, the PLC controls The rectifier controls the rectifier and/or the energy storage device to deliver the current to the inverter; otherwise, the rectifier is controlled to send the rectified current to the energy storage device for charging, and the charging power source comes from the shaft-end generator (in the case of axle rotation) or from the city Electric (when the axle does not turn). Increased flexibility in vehicle marshalling. The shaft end generator is used, which is small in size and low in cost.

Description

Shaft-end generator power generation energy storage power supply system and power supply method

technical field

The invention relates to the technical fields of rail transportation, road transportation and non-road transportation, in particular to a shaft-end generator power generation, energy storage and power supply system and a power supply method thereof.

Background technique

Railway passenger cars and trucks need to meet the needs of external power supply for the charging of the vehicle's electrical equipment (lighting, electric water heater, refrigerator, etc.) and energy storage devices. There are currently two main power supply technologies: 1) Centralized power supply from the front power supply, 2) Independent distributed power supply Electric vehicle. Because the centralized power supply of the locomotive power supply is inconvenient for flexible marshalling at the marshalling station and cannot meet the diverse needs of passenger and freight, it has no practical value. The existing train power supply system is only suitable for passenger trains, not for freight trains. Railway freight cars have the characteristics of harsh operating conditions and frequent marshalling. It is difficult to implement the method of supplying power from traction locomotives or generator cars to them through cables. Installing independent distributed self-generating devices on single-section vehicles of railway freight cars is a research direction to solve this problem. . China's railway transportation lines are widely distributed, large in volume, low in transportation costs, energy-saving and environmentally friendly. However, due to the lack of independent distributed power generation and distribution systems for railway freight vehicles, railway transportation cannot enter the fresh food transportation market that requires insulation. For vehicles with independent distributed power generation, each vehicle can be freely combined and grouped during operation, and the transportation flexibility is high, meeting the actual needs of transportation enterprises. In the past few decades, vehicles with independent distributed power generation need to be equipped with an independent internal combustion engine power generation system. However, the internal combustion engine has high power generation costs, high noise, and removes a large amount of polluting gases, which is not in line with the development direction of energy conservation and emission reduction. In the existing related patents, such as the patent with the application number of 201510653776.8, the solution is that the voltage conversion unit converts the DC voltage output by the energy storage unit into the DC voltage required by the control unit and the electronic equipment of the truck, which cannot provide high power AC power supply for electrical needs. The patent with application number 201620172593.4 directly uses the energy storage device to output low-voltage, low-power DC power, and cannot provide AC power supply for high-power electricity demand.

During manufacture, due to the large volume of other generators (such as axle-belt-driven generators), the body structure of the railway freight car needs to be redesigned. The high cost and complex maintenance conditions determine that this solution is difficult to implement. ; At the same time there is the problem of electrical energy storage.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve at least the technical defects mentioned.

Therefore, an object of the present invention is to propose a shaft-end generator power generation energy storage power supply system and a power supply method thereof, so that the equipment can be charged by the mains power grid, and when the truck is not running, the truck can be supplemented with electric energy at the marshalling station as needed , When the truck is running, the shaft rotation can drive the generator to generate electricity, and no external power supply is needed at this time; at the same time, the flexibility of the truck grouping is improved.

In order to achieve the above object, an embodiment of the present invention provides a power generation, energy storage and power supply system for a truck shaft-end generator, including a shaft-end generator, a rectifier, an inverter and a PLC controller;

The shaft-end generator is fixedly connected with the vehicle wheel shaft, and the shaft-end generator is driven to generate electricity by the rotation of the vehicle wheel shaft; the shaft-end generator is electrically connected with the rectifier, and the rectifier is connected in parallel with the energy storage device; After parallel connection, it is connected to the inverter; the inverter is connected to the electrical load; the shaft-end generator is used to send the generated current to the rectifier, which is rectified by the rectifier, and the rectifier sends the rectified current to the energy storage device powered and/or sent directly to the inverter;

The PLC controller is used to collect the current power information of the energy storage device, and switch the power supply condition according to the collected power information;

Condition 1: When the current power information of the energy storage device meets the needs of the electrical load, the PLC controller controls the energy storage device and/or the rectified current is directly sent to the inverter.

Condition 2: When the current power information of the energy storage device cannot meet the needs of the electrical load, the PLC controller controls the rectifier to send the rectified current directly to the energy storage device for charging. When the charging reaches the set value, the energy storage device is restored. supply power to the inverter;

Condition 3: If the load does not need electricity or the output power of the rectifier is greater than the power consumed by the load, the rectifier charges the energy storage device to the full upper limit set by the BMS.

Preferably, the energy storage device is connected to a power management system BMS, and the power management system BMS is used to collect current power information of the energy storage device; and send the collected power information of the power source to the PLC controller.

In any of the above embodiments, preferably, one end of the rectifier and the energy storage device in parallel is connected to the inverter by connecting an electromagnetic relay; the driving coil of the electromagnetic relay is connected to a PLC controller; the PLC controller is controlled by The contacts of the electromagnetic relay act to switch the power supply conditions.

Preferably in any of the above embodiments, the PLC controller is wirelessly connected to the cloud platform; when the PLC controller detects that the remaining power of the energy storage device reaches the alarm line, the PLC controller sends alarm information to the cloud platform; The remote sending system of the cloud platform notifies the corresponding personnel to supply power to the energy storage device through the external mains power supply in time.

The present invention also provides a shaft-end generator power generation, energy storage and power supply method, comprising the following steps:

S1: Connect the shaft-end generator to the vehicle axle, and use the vehicle axle to rotate to drive the shaft-end generator to generate electricity; the shaft-end generator sends the generated current to the rectifier for rectification;

S2: The PLC controller collects the current power information of the energy storage device, and switches the power supply conditions according to the collected power information;

Condition 1: When the current power information of the energy storage device meets the needs of the electrical load, the PLC controller controls the current generated by the energy storage device and or the current rectified by the rectifier to be sent directly to the inverter.

Condition 2: When the current power information of the energy storage device cannot meet the needs of the electrical load, the PLC controller controls the rectifier to send the rectified current directly to the energy storage device for charging. When the charging reaches the set value, the energy storage device is restored. supply power to the inverter;

Condition 3: If the load does not need electricity or the output power of the rectifier is greater than the power consumed by the load, the rectifier charges the energy storage device to the full upper limit set by the BMS.

Preferably, in S2, when the PLC controller collects the current power information of the energy storage device, the power management system BMS is used to collect the information, the energy storage device is connected to the power management system BMS, and the power management system BMS collects the current power of the energy storage device. information; and send the collected power information of the energy storage device to the PLC controller.

Preferably in any of the above embodiments, in S2, when switching the power supply conditions, an electromagnetic relay is connected at the end of the rectifier and the energy storage device in parallel, and the inverter is connected through the electromagnetic relay; the driving of the electromagnetic relay The coil is connected to the PLC controller; the PLC controller switches the power supply condition by controlling the contact action of the electromagnetic relay.

Preferably in any of the above embodiments, it also includes S3, the PLC controller is wirelessly connected to the cloud platform; when the PLC controller detects that the remaining power of the energy storage device reaches the alarm line, the PLC controller sends alarm information to the cloud platform. ; Through the remote reporting system of the cloud platform, the corresponding personnel are notified in time to replenish the energy storage device through the external mains power supply.

A shaft-end generator power generation energy storage power supply system and a power supply method thereof provided according to an embodiment of the present invention; compared with the prior art, at least the following advantages are provided:

The shaft-end generator is adopted, the equipment is small in size, low in cost, saves installation space, reduces transmission risks such as hydraulic oil leakage, and enables the equipment to be charged by the mains grid. When the vehicle is not running, the vehicle can be replenished at the marshalling yard as needed. When the vehicle is running, the rotation of the axle can drive the generator to generate electricity. At this time, no external power supply is required, and the flexibility of vehicle grouping is improved.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

Fig. 1 is a circuit connection block diagram of a shaft-end generator power generation, energy storage and power supply system of the present invention;

Fig. 2 is a flow chart of a shaft-end generator power generation, energy storage and power supply method according to the present invention;

In the picture:

1. Vehicle axle; 2. Shaft end generator; 3. Rectifier; 4. Energy storage device; 5. Power management system BMS; 6. PLC controller; 7. Inverter; 8. Cloud platform;

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

As shown in FIG. 1 , a shaft-end generator 2 power generation, energy storage and power supply system according to an embodiment of the present invention includes a shaft-end generator 2, a rectifier 3, an inverter 7 and a PLC controller 6;

The shaft-end generator 2 is fixedly connected with the vehicle wheel shaft 1, and the shaft-end generator 2 is driven to generate electricity by the rotation of the vehicle wheel shaft 1; the shaft-end generator 2 is electrically connected with the rectifier 3, and the rectifier 3 connected in parallel with the energy storage device 4; connected with the inverter 7 after parallel connection; the inverter 7 is connected to the electrical load; the shaft end generator 2 is used to send the generated current to the rectifier 3, and the Rectification, the rectifier 3 sends the rectified current to the energy storage device 4 for power supply and/or directly to the inverter 7;

It should be noted that the energy storage device in the technical solution of the present application may be a battery or a capacitor.

The PLC controller 6 is used to collect the current power information of the energy storage device 4, and switch the power supply conditions according to the collected power information; one end of the rectifier 3 and the energy storage device 4 in parallel is connected to the inverter by connecting an electromagnetic relay. 7. The drive coil of the electromagnetic relay is connected to the PLC controller 6; the PLC controller 6 switches the power supply working condition by controlling the contact action of the electromagnetic relay.

Condition 1: When the current power information of the energy storage device 4 meets the needs of the electrical load, the PLC controller 6 PLC controller controls the energy storage device 4 and or the rectified current of the rectifier is directly sent to the inverter and directly sent to the inverter. device,

Working condition 2: When the current power information of the energy storage device 4 cannot meet the needs of the electrical load, the PLC controller 6 controls the rectifier 3 to directly send the rectified current to the energy storage device for charging. The energy storage device supplies power to the inverter;

Condition 3: If the electrical load does not require electricity or the output power of the rectifier is greater than the power consumed by the load, the rectifier charges the energy storage device to the full upper limit set by the power management system BMS. In this working condition, it is similar to the above-mentioned working condition 2, the difference is that the load consumes little or no electricity at this time; for the judgment of the output power of the rectifier and the power consumed by the load, it only needs to be connected to the vehicle according to the electric load. The output current of each socket in the power distribution box can be determined; the current transformer is set at the connection between the power distribution box and the socket interface, and the current value of the current interface is detected by the current transformer, and the power consumption of the electrical load is calculated; The electric loads on the vehicle are all set to limit the current; the maximum output power of the rectifier is reached when the load is full; to avoid damage to the generator due to excessive load.

The PLC controller 6 is wirelessly connected to the cloud platform; when the PLC controller 6 detects that the remaining power of the energy storage device 4 reaches the alarm line, the PLC controller 6 sends alarm information to; the remote reporting system of the cloud platform notifies the corresponding The personnel supply power to the energy storage device 4 through the external mains power supply in time.

In one embodiment of the present invention, under the normal operating condition of the train, the axle drives the generator at the shaft end to generate electricity, and within the range of the vehicle speed of 30km/h-120km/h (this range can be adjusted by the rectifier according to the specific vehicle model) The generated electricity is rectified by the rectifier, and the rectifier converts the current from the generator into three-phase electricity; it supplies power to the energy storage device.

It should be noted that the PLC controller sets the voltage range of the power management system BMS, and the power management system BMS of the energy storage device automatically determines whether to charge the energy storage device according to the real-time voltage level of the power supply. When the electrical load needs to work, if the train stops temporarily, the generator at the shaft end cannot generate current, and the energy storage device supplies power at this time.

When the train is running, the PLC can switch between the energy storage device to supply power alone, the rectifier to supply power alone, or the energy storage device and the rectifier to supply power to the inverter by collecting the power information of the energy storage device.

When the train is regrouped at the station, the energy storage device (within the rated capacity of the energy storage device) can be used to supply power to the inverter. If the remaining power of the energy storage device reaches the alarm line, the alarm information will notify the corresponding personnel through the remote reporting system of the cloud platform 8 to replenish the energy storage device in time through the external mains power supply.

The working status information of generators, rectifiers and energy storage devices is extracted and logically judged by PLC, so that each system can run intelligently without manual intervention. The cloud platform stores the history and current working status information of each unit of the system and can transmit the relevant information to the relevant personnel through the remote sending module.

The present invention also provides a shaft-end generator power generation, energy storage and power supply method, comprising the following steps:

S1: Connect the shaft-end generator to the vehicle axle, and use the vehicle axle to rotate to drive the shaft-end generator to generate electricity; the shaft-end generator sends the generated current to the rectifier for rectification;

S2: The PLC controller collects the current power information of the energy storage device, and switches the power supply conditions according to the collected power information; when the PLC controller collects the current power information of the energy storage device, it collects through the power management system BMS, and the energy storage device is connected The power management system BMS collects the current power information of the energy storage device; and sends the collected power information of the power supply to the PLC controller.

When switching the power supply conditions, an electromagnetic relay is connected to the parallel end of the rectifier and the energy storage device, and the inverter is connected through the electromagnetic relay; the driving coil of the electromagnetic relay is connected to the PLC controller; the PLC controller controls the electromagnetic relay by controlling the electromagnetic relay. The contacts act to switch the power supply conditions.

Condition 1: When the current power information of the energy storage device meets the needs of the electrical load, the PLC controller controls the energy storage device and/or the rectified current is directly sent to the inverter.

Condition 2: When the current power information of the energy storage device cannot meet the needs of the electrical load, the PLC controller controls the rectifier to send the rectified current directly to the energy storage device for charging. When the charging reaches the set value, the energy storage device is restored. supply power to the inverter;

Condition 3: If the load does not need electricity or the output power of the rectifier is greater than the power consumed by the load, the rectifier charges the energy storage device to the full upper limit set by the BMS.

It also includes S3, the PLC controller is wirelessly connected to the cloud platform; when the PLC controller detects that the remaining power of the energy storage device reaches the alarm line, the PLC controller sends alarm information to the cloud platform; the remote sending system of the cloud platform notifies the corresponding Personnel supply power to the energy storage device through the external mains power supply in time.

In an embodiment of the present invention, under the normal operating condition of the train, the axle drives the shaft-end generator to generate electricity, and the vehicle speed is 30km/h-120km/h (this range can be adjusted by the rectifier according to the specific vehicle model), within the range The generated electricity is rectified by the rectifier, and the rectifier converts the current from the generator into three-phase electricity; it supplies power to the energy storage device.

It should be noted that the PLC controller sets the voltage range of the power management system BMS, and the power management system BMS of the energy storage device automatically determines whether to charge the energy storage device according to the real-time voltage level of the energy storage device. When the electrical load needs to work, if the train stops temporarily, the generator at the shaft end cannot generate current, and the energy storage device supplies power at this time.

When the train is running, the PLC can switch between the energy storage device to supply power alone, the rectifier to supply power alone, or the energy storage device and the rectifier to supply power to the inverter by collecting the power information of the energy storage device.

When the train is regrouped at the station, the energy storage device (within the rated capacity of the energy storage device) can be used to supply power to the inverter. If the remaining power of the energy storage device reaches the alarm line, the alarm information will notify the corresponding personnel through the remote reporting system of the cloud platform to replenish the energy storage device through the external mains power supply in time.

The working status information of generators, rectifiers and energy storage devices is extracted and logically judged by PLC, so that each system can run intelligently without manual intervention. The cloud platform stores the history and current working status information of each unit of the system and can transmit the relevant information to the relevant personnel through the remote sending module.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those of ordinary skill in the art will not depart from the principles and spirit of the present invention Variations, modifications, substitutions, and alterations to the above-described embodiments are possible within the scope of the present invention without departing from the scope of the present invention. The scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. a kind of shaft end electrical power generators energy storage for power supply system, which is characterized in that including shaft end generator, rectifier, energy storage dress It sets, inverter and PLC controller；

The shaft end generator is fixedly connected with vehicle axles, is rotated using the vehicle axles, is driven the shaft end generator It generates electricity；The shaft end generator is electrically connected with rectifier, and the rectifier is connect with energy storage device；Rectifier and energy storage fill It is connect after setting parallel connection with inverter；The inverter connects power load；The electric current hair that the shaft end generator is used to generate It send to rectifier, is rectified by rectifier, the electric current after rectifier rectifies external alternating current or shaft end dynamo current is sent out It gives energy storage device power supply or is sent directly to inverter；

The PLC controller switches according to the information about power of acquisition and powers for acquiring the current information about power of energy storage device Operating condition；

Operating condition one: when the current information about power of energy storage device meets when needing of power load, after PLC controller control rectification The electric current of electric current and/or energy storage device is sent directly to inverter；

Operating condition two: when the current information about power of energy storage device is unable to satisfy when needing of power load, PLC controller control rectification Electric current after rectification is sent directly to energy storage device charging by device, when being charged to setting value, is restored energy storage device and is supplied to inverter Electricity；

Operating condition three: when not needing the output power of electricity consumption or rectifier as loaded and be greater than the power of load consumption, rectifier to Energy storage device charge to BMS setting full of the upper limit.

2. electrical power generators energy storage for power supply system in shaft end according to claim 1, which is characterized in that the energy storage device connects Power-supply management system BMS is met, the power-supply management system BMS is for acquiring the current information about power of energy storage device；And it will acquisition To the information about power of power supply be sent to PLC controller.

3. electrical power generators energy storage for power supply system in shaft end according to claim 1, which is characterized in that the rectifier and storage One end of energy device parallel connection passes through connection electromagnetic relay and connects inverter；The driving coil of the electromagnetic relay connects PLC Controller；The PLC controller is powered the switching of operating condition by the contact action of control electromagnetic relay.

4. electrical power generators energy storage for power supply system in shaft end according to claim 1, which is characterized in that the PLC controller By being wirelessly connected cloud platform；When PLC controller detects that the remaining capacity of energy storage device reaches alarming line, PLC controller Warning message is sent to cloud platform；Corresponding personnel are notified to pass through external mains supply in time by the long-range messaging system of cloud platform Electricity is mended to energy storage device.

5. a kind of shaft end electrical power generators energy storage for power supply method, which comprises the following steps:

S1: shaft end generator being connect with vehicle axles, is rotated using vehicle axles, and shaft end generator is driven to generate electricity；Axis It holds generator that the electric current of generation is sent to rectifier, is rectified by rectifier；

S2:PLC controller acquires the current information about power of energy storage device, and switches condition of supplying power according to the information about power of acquisition；

Operating condition one: when the current information about power of energy storage device meets when needing of power load, after PLC controller control rectification The electric current of electric current and/or energy storage device is sent directly to inverter；

Operating condition two: when the current information about power of energy storage device is unable to satisfy when needing of power load, PLC controller control rectification Electric current after rectification is sent directly to energy storage device charging by device, when being charged to setting value, is restored energy storage device and is supplied to inverter Electricity；

Operating condition three: when not needing the output power of electricity consumption or rectifier as loaded and be greater than the power of load consumption, rectifier to Energy storage device charge to BMS setting full of the upper limit.

6. electrical power generators energy storage for power supply method in shaft end according to claim 5, which is characterized in that in S2, further include It when PLC controller acquires energy storage device current information about power, is acquired by power-supply management system BMS, energy storage device connects Power-supply management system BMS is met, power-supply management system BMS acquires the current information about power of energy storage device；And by collected energy storage The information about power of device is sent to PLC controller.

7. electrical power generators energy storage for power supply method in shaft end according to claim 5, which is characterized in that in S2, supplied When the switching of electrician's condition, in rectifier one end in parallel with energy storage device, electromagnetic relay is connected, and connect by electromagnetic relay Connect inverter；The driving coil of electromagnetic relay connects PLC controller；The PLC controller passes through control electromagnetic relay Contact action is powered the switching of operating condition.

8. electrical power generators energy storage for power supply method in shaft end according to claim 5, which is characterized in that further include S3, PLC control Device processed is by being wirelessly connected cloud platform；When PLC controller detects that the remaining capacity of energy storage device reaches alarming line, PLC control Device processed sends warning message to cloud platform；Corresponding personnel are notified to pass through external alternating current in time by the long-range messaging system of cloud platform Power supply mends electricity to energy storage device.