CN111645526A - Locomotive energy feedback device and electric energy feedback method, device and system thereof - Google Patents

Locomotive energy feedback device and electric energy feedback method, device and system thereof Download PDF

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Publication number
CN111645526A
CN111645526A CN201910424471.8A CN201910424471A CN111645526A CN 111645526 A CN111645526 A CN 111645526A CN 201910424471 A CN201910424471 A CN 201910424471A CN 111645526 A CN111645526 A CN 111645526A
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China
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locomotive
energy feedback
station
threshold voltage
locomotive energy
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CN111645526B (en
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吴扣林
刘洪德
王宇
祁琦
钱为
谢晔源
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The application provides a locomotive energy feedback device and an electric energy feedback method, device and system thereof. The method comprises the following steps: setting a starting threshold voltage of a locomotive energy feedback device of a preset traction station to be a first set value larger than the no-load voltage of a traction rectifier of the preset traction station; judging whether the locomotive energy feedback devices of the adjacent traction stations adjacent to the preset traction station are in an electric energy feedback saturation state or not, wherein the locomotive energy feedback devices of the preset traction station and the locomotive energy feedback devices of the adjacent traction stations are started after the voltages reach respective starting threshold voltages respectively, and performing electric energy feedback control; and responding to the situation that the locomotive energy feed device of the adjacent traction station is in an electric energy feedback saturation state, and adjusting the starting threshold voltage of the locomotive energy feed device of the preset traction station until the locomotive energy feed device of the preset traction station is in the electric energy feedback saturation state.

Description

Locomotive energy feedback device and electric energy feedback method, device and system thereof
Technical Field
The application relates to the technical field of power electronic converters, in particular to a locomotive energy feedback device and an electric energy feedback method, device and system thereof.
Background
Since the 21 st century, with the increasingly prominent urban traffic problems in China, the vigorous development of urban rail transit has become an inevitable choice for urban traffic development. The absorption mode of the regenerative braking energy of the locomotive mainly comprises resistance consumption, capacitance energy storage, inversion feedback, flywheel energy storage and the like. The energy feedback converter based on the inversion mode has the advantages of good energy-saving effect, simple system and low investment, and is paid more and more attention and applied.
The subway power supply system is a 24-pulse rectifier consisting of two 12-pulse rectifiers connected in parallel. The locomotive regenerative electric energy feedback device is called a locomotive energy feedback device for short, and can feed back the energy of a direct current bus into a 10kV/35kV alternating current system after the subway is braked. The locomotive regenerative electric energy feedback device detects the direct current bus voltage in real time, when the direct current bus voltage is larger than a starting threshold, the PWM pulse signal is immediately started, and the direct current voltage is controlled to a specific control target, so that the subway braking energy is quickly fed back to a power grid. The characteristic control target is greater than the no-load voltage of the diode rectifier to prevent the diode rectifier from forming a circulating current with the energy feed system. When the locomotive regenerative electric energy feedback device detects that the alternating current is smaller than a specific value or the direct current is reversed, indicating that the locomotive brake is finished or the locomotive is started, the locomotive regenerative electric energy feedback device immediately locks the PWM pulse signal and enters a standby state.
The braking power of the subway train reaches several megawatts, the requirement on the capacity of an energy feeding device is high, the capacity of the energy feeding device configured in the existing engineering is generally 2 MW-4 MW, the voltage starting threshold of the energy feeding device in a single station is generally set between the no-load voltage of a rectifier and the starting voltage of a train vehicle-mounted resistor, the energy feeding devices in the stations operate independently and do not communicate with each other. If the distance between stations is long, the situation that the feedback power of the energy feeding device of the station reaches the rated power and the energy feeding device of the adjacent station does not work or the power does not reach the rated power can occur, so that the direct current network voltage of the station is increased, the action of a vehicle-mounted resistor or a brake shoe can be caused, and the safe operation of a train is seriously influenced.
Disclosure of Invention
The embodiment of the application provides an electric energy feedback method of a locomotive energy feedback device, which comprises the following steps: setting a starting threshold voltage of a locomotive energy feedback device of a preset traction station to be a first set value larger than the no-load voltage of a traction rectifier of the preset traction station; judging whether the locomotive energy feedback devices of the adjacent traction stations adjacent to the preset traction station are in an electric energy feedback saturation state or not, wherein the locomotive energy feedback devices of the preset traction station and the locomotive energy feedback devices of the adjacent traction stations are started after the voltages reach respective starting threshold voltages respectively, and performing electric energy feedback control; and responding to the situation that the locomotive energy feed device of the adjacent traction station is in an electric energy feedback saturation state, and adjusting the starting threshold voltage of the locomotive energy feed device of the preset traction station until the locomotive energy feed device of the preset traction station is in the electric energy feedback saturation state.
As one aspect of the present application, the adjusting of the start threshold voltage of the locomotive energy feeding device of the predetermined traction station includes: judging whether the locomotive energy feedback device of the preset traction station is in an electric energy feedback saturation state or not; responding to the situation that the locomotive energy feedback device of the preset traction station is not in an electric energy feedback saturation state, and judging whether the starting threshold voltage of the locomotive energy feedback device of the preset traction station is larger than the minimum value of the starting threshold voltage; responding to the fact that the starting threshold voltage of the locomotive energy feeding device of the preset traction station is larger than the starting threshold voltage minimum value, setting the starting threshold voltage of the locomotive energy feeding device of the preset traction station to be reduced by a second set value, and enabling the retention time of the reduced starting threshold voltage to be a third set value; and responding to the starting threshold voltage of the locomotive energy feeding device of the preset traction station not being larger than the starting threshold voltage minimum value, and keeping the starting threshold voltage of the locomotive energy feeding device of the preset traction station unchanged.
As one aspect of the application, the electric energy feedback saturation state includes that the feedback power of the locomotive energy feeding device reaches the rated power or the locomotive energy feeding device stops working.
As one aspect of the present application, the start threshold voltage minimum is greater than the traction rectifier no-load voltage by a fourth set value.
As an aspect of the application, the first set value is between 10V and 100V.
As an aspect of the application, the second set value is between 1V and 10V.
As an aspect of the application, the third set value is between 1 second and 10 seconds.
As an aspect of the present application, the fourth set value is between 10V and 30V, and the fourth set value is smaller than the first set value.
The embodiment of the application also provides an electric energy feedback device of the locomotive energy feeding device, which comprises a setting unit, an adjacent station saturation judging unit, an adjusting unit and a control unit, wherein the setting unit sets the starting threshold voltage of the locomotive energy feeding device of a preset traction station to be larger than the no-load voltage of a traction rectifier of the preset traction station by a first set value, and the control unit controls the locomotive energy feeding device of the preset traction station to start after the voltage reaches the starting threshold voltage so as to perform electric energy feedback control; the adjacent station saturation judging unit judges whether the locomotive energy feedback device of the adjacent traction station adjacent to the preset traction station is in an electric energy feedback saturation state; the adjusting unit responds to that the locomotive energy feeding device of the adjacent traction station is in an electric energy feedback saturation state, and adjusts the starting threshold voltage of the locomotive energy feeding device of the preset traction station until the locomotive energy feeding device of the preset traction station is in the electric energy feedback saturation state.
As one aspect of the application, the adjusting unit includes a station saturation judging module, a non-saturation control module, a non-critical control module, and a critical control module, and the station saturation judging module judges whether a locomotive energy feed device of the predetermined traction station is in an electric energy feedback saturation state; the non-saturation control module responds to the situation that the locomotive energy feedback device of the preset traction station is not in an electric energy feedback saturation state, and judges whether the starting threshold voltage of the locomotive energy feedback device of the preset traction station is larger than the minimum value of the starting threshold voltage or not; the non-critical control module responds to the fact that the starting threshold voltage of the locomotive energy feeding device of the preset traction station is larger than the starting threshold voltage minimum value, the starting threshold voltage of the locomotive energy feeding device of the preset traction station is set to be reduced by a second set value, and the holding time of the reduced starting threshold voltage is made to be a third set value; the threshold control module responds to the fact that the starting threshold voltage of the locomotive energy feeding device of the preset traction station is not larger than the starting threshold voltage minimum value, and the starting threshold voltage of the locomotive energy feeding device of the preset traction station is kept unchanged.
The embodiment of the application also provides a locomotive energy feeding device, which comprises the electric energy feedback device of the locomotive energy feeding device.
The embodiment of the present application further provides an electric energy feedback system of a locomotive energy feedback device, including: n locomotive energy feed devices according to claim 11, N.gtoreq.2; and the locomotive energy feeding device carries out inter-station communication between the inter-station switches.
As one aspect of the application, the switch comprises a process layer switch or a station layer switch.
As an aspect of the present application, the network for inter-station communication is a station control layer network or a process layer network.
As an aspect of the present application, the communication protocol for the inter-station communication includes IEC103 or IEC 61850.
According to the system provided by the embodiment of the application, after the capacity requirement on the locomotive energy feedback device is increased after the vehicle-mounted resistor is cancelled in the locomotive, the locomotive energy feedback device of the whole line is enabled to work coordinately, the feedback capacity of the adjacent station energy feedback device to the station is improved, and the capacity of the locomotive energy feedback device is further reduced; the voltage starting threshold of the energy feedback device of the station is corrected through the state of the energy feedback device of the adjacent station, so that the self-adaptive dynamic adjustment of the voltage starting threshold of the energy feedback device of each station is realized, the maximum feedback capacity of the energy feedback device of the whole-line locomotive is exerted, the voltage of a direct current traction network of the locomotive is stabilized to the maximum extent, the starting probability of the vehicle-mounted resistance and the brake shoe of the locomotive is reduced, and the method has great significance for the safe and stable operation of the locomotive; the energy feeding device can share a communication network with the existing protection equipment of a locomotive power supply system, so that additional equipment investment is not increased, and the cost is lower.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an access system of a locomotive energy feeding device according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating an electric energy feedback system of a locomotive energy feedback device according to an embodiment of the present application;
fig. 3 is a schematic flow chart illustrating an electric energy feedback method of a locomotive energy feedback device according to an embodiment of the present application;
fig. 4 is a flowchart illustrating an electric energy feedback method of a locomotive energy feedback device according to another embodiment of the present application;
fig. 5 is a schematic diagram illustrating an electric energy feedback device of a locomotive energy feedback device according to an embodiment of the present application;
fig. 6 is a schematic diagram illustrating an electric energy feedback device of a locomotive energy feedback device according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, specific embodiments of the technical solutions of the present application will be described in more detail and clearly in the following with reference to the accompanying drawings and the embodiments. However, the specific embodiments and examples described below are for illustrative purposes only and are not limiting of the present application. It is intended that the present disclosure includes only some embodiments and not all embodiments, and that other embodiments may be devised by those skilled in the art with various modifications as fall within the scope of the appended claims.
Fig. 1 is a schematic diagram of an access system of a locomotive energy feeding device according to an embodiment of the present application. As shown in fig. 1, the high-voltage side of the ac power grid is a 110KV power supply, and the low-voltage side of the ac power grid is a 35KV power supply. Or the high-voltage side of the alternating current power grid is provided with a 35KV power supply, and the low-voltage side of the alternating current power grid is provided with a 10KV power supply. But not limited thereto. The locomotive energy feedback device 1 and the traction rectifier 11 are connected in parallel between an alternating current bus and a direct current bus on the low-voltage side of an alternating current power grid.
Fig. 2 is a schematic diagram of an electric energy feedback system of a locomotive energy feeding device according to an embodiment of the present application, including N locomotive energy feeding devices and N switches, where N is greater than or equal to 2. The locomotive energy feeding device carries out inter-station communication between the inter-station switches.
As shown in fig. 1, the direct current side of the locomotive energy feeding device is connected with a 1500V locomotive traction direct current network, and the locomotive energy feeding devices 1, 2 and 3 are connected between a direct current positive bus 7 of a locomotive power supply system and a direct current negative bus 8 of the locomotive power supply system. The alternating current side of the locomotive energy feeding device is connected with a 35kV locomotive alternating current power supply network, namely is connected with an alternating current bus 9 of a locomotive power supply system.
The locomotive energy feeding device carries out inter-station communication through the inter-station switch. As shown in fig. 1, the locomotive energy feed devices 1, 2, 3 perform inter-station communication through switches 4, 5, 6.
The station is the Nth station, and the adjacent stations are N-1 stations or N +1 stations. In fig. 1, the neighbors of switch 2 are switch 1, switch 3.
Switches include, but are not limited to, process layer switches or station level switches. The network for inter-station communication includes, but is not limited to, an station level network or a process level network. Communication protocols for inter-station communication include, but are not limited to, IEC103 or IEC 61850.
The voltage starting threshold of the energy feedback device of the station is influenced by the state of the energy feedback device of the adjacent station, and the voltage starting threshold of the energy feedback device of the station is corrected through the state of the energy feedback device of the adjacent station, so that the self-adaptive dynamic adjustment of the voltage starting threshold of the energy feedback device of each station is realized, the maximum feedback capacity of the energy feedback device of the whole-line locomotive is exerted, the voltage of a direct current traction network of the locomotive is stabilized to the maximum extent, the starting probability of a vehicle-mounted resistor and a brake shoe of the locomotive is reduced, and the method has great significance for safe and stable operation of the locomotive.
Fig. 3 is a schematic flow chart of an electric energy feedback method of a locomotive energy feedback device according to an embodiment of the present application, including the following steps.
In step S10, the start threshold voltage of the locomotive energy feed device of the predetermined traction station is set to be greater than the traction rectifier no-load voltage of the predetermined traction station by a first set value.
The starting threshold voltage of the locomotive energy feeding device of the preset traction station is set to be a first starting threshold voltage Udcset 1. The first start-up threshold voltage Udcset1 is the sum of the idling voltage Udc _ nl of the traction rectifier of the predetermined traction station and a first setpoint value. The first set value is between 10V and 100V. In the present embodiment, the first setting value is set to 50V.
In step S20, it is determined whether the locomotive energy feeding device of the adjacent traction station adjacent to the predetermined traction station is in the electric energy feedback saturation state.
The locomotive energy feedback device of the preset traction station and the locomotive energy feedback device of the adjacent traction station are respectively started after the voltage reaches the respective starting threshold voltage, and electric energy feedback control is carried out.
One or two adjacent draw stations adjacent to the intended draw station. And judging whether the feedback power of the locomotive energy feedback devices of one or two adjacent traction stations is in an electric energy feedback saturation state, and if one of the locomotive energy feedback devices is in the electric energy feedback saturation state, entering the step S30.
The fact that the locomotive energy feeding device is in an electric energy feedback saturation state means that the locomotive energy feeding device reaches rated power or whether the locomotive energy feeding device stops working or not.
In actual implementation, it is determined whether the state of the adjacent station locomotive energy feeding device is 1, and if so, the process proceeds to step S30. Wherein the state 1 represents that the locomotive energy feeding device is in an electric energy feedback saturation state.
In step S30, in response to the energy feedback device of the locomotive at the adjacent traction station being in the power feedback saturation state, the start threshold voltage of the energy feedback device of the locomotive at the predetermined traction station is adjusted until the energy feedback device of the locomotive at the predetermined traction station enters the power feedback saturation state.
Fig. 4 is a flowchart of an electric energy feedback method of a locomotive energy feedback device according to another embodiment of the present application, including the following steps.
In step S10, the start threshold voltage of the locomotive energy feed device of the predetermined traction station is set to be greater than the traction rectifier no-load voltage of the predetermined traction station by a first set value.
The starting threshold voltage of the locomotive energy feeding device of the preset traction station is set to be a first starting threshold voltage Udcset 1. The first starting threshold voltage Udcset1 is the sum of the no-load voltage Udc _ nl of the traction rectifier and a first set value. The first set value is between 10V and 100V. In the present embodiment, the first setting value is set to 50V.
In step S20, it is determined whether the locomotive energy feeding device of the adjacent traction station adjacent to the predetermined traction station is in the electric energy feedback saturation state.
The locomotive energy feedback device of the preset traction station and the locomotive energy feedback device of the adjacent traction station are respectively started after the voltage reaches the respective starting threshold voltage, and electric energy feedback control is carried out.
One or two adjacent draw stations adjacent to the intended draw station. And judging whether the feedback power of the locomotive energy feedback devices of one or two adjacent traction stations is in an electric energy feedback saturation state, and if one of the locomotive energy feedback devices is in the electric energy feedback saturation state, entering the step S30.
The fact that the locomotive energy feeding device is in an electric energy feedback saturation state means that the locomotive energy feeding device reaches rated power or whether the locomotive energy feeding device stops working or not.
In actual implementation, it is determined whether the state of the adjacent station locomotive energy feeding device is 1, and if so, the process proceeds to step S30. Wherein the state 1 represents that the locomotive energy feeding device is in an electric energy feedback saturation state.
In step S30, in response to the energy feedback device of the locomotive at the adjacent traction station being in the power feedback saturation state, the start threshold voltage of the energy feedback device of the locomotive at the predetermined traction station is adjusted until the energy feedback device of the locomotive at the predetermined traction station enters the power feedback saturation state.
Adjusting the start threshold voltage includes the following steps.
In step S31, it is determined whether the locomotive energy feedback device of the predetermined traction station is in the electric energy feedback saturation state.
The fact that the locomotive energy feeding device is in an electric energy feedback saturation state means that the locomotive energy feeding device reaches rated power or whether the locomotive energy feeding device stops working or not.
In actual implementation, it is determined whether the state of the locomotive energy feeding device of the predetermined traction station is 1, and if not, the process proceeds to step S32. Wherein the state 1 represents that the locomotive energy feeding device is in an electric energy feedback saturation state.
In step S32, in response to that the energy feeding device of the locomotive at the predetermined traction station is not in the power feedback saturation state, it is determined whether the start threshold voltage of the energy feeding device of the locomotive at the predetermined traction station is greater than the minimum start threshold voltage value.
And when the locomotive energy feedback device of the preset traction station enters an electric energy feedback saturation state, keeping the starting threshold voltage of the locomotive energy feedback device of the preset traction station unchanged. And if the locomotive energy feedback device is not in the electric energy feedback saturation state, judging whether the starting threshold voltage of the locomotive energy feedback device of the preset traction station is greater than the minimum value of the starting threshold voltage.
In step S33, in response to the start threshold voltage of the locomotive energy feeding device of the predetermined traction station being greater than the start threshold voltage minimum value Udcsetmin, the start threshold voltage of the locomotive energy feeding device of the predetermined traction station is set to be decreased by a second set value, so that the retention time of the decreased start threshold voltage is a third set value.
The set start threshold voltage is set to Udcset2 after the second set point is lowered. The second set value is between 1V and 10V. The third set point is between 1 second and 10 seconds. In this embodiment, the second set value is 5V, and the third set value is 5 seconds.
The minimum starting threshold voltage value Udcsetmin is the sum of the no-load voltage Udc _ n1 of the traction rectifier and a fourth set value. The fourth setting value is between 10V and 30V, and the fourth setting value is smaller than the first setting value. In the present embodiment, the fourth setting value is set to 30V.
When the energy feedback device of the locomotive is not in an electric energy feedback saturation state and the starting threshold voltage is greater than the minimum value Udcsetmin of the starting threshold voltage, the starting threshold voltage is reduced. In order to prevent the start threshold voltage from fluctuating frequently, the adjustment needs to be determined again after a certain period of time (third setting).
In step S34, in response to the start threshold voltage of the locomotive energy feeding device of the predetermined traction station not being greater than the start threshold voltage minimum value Udcsetmin, the start threshold voltage of the locomotive energy feeding device of the predetermined traction station remains unchanged.
Fig. 5 is a schematic diagram of an electric energy feedback device of a locomotive energy feedback device according to an embodiment of the present application, including a setting unit 21, a control unit 22, an adjacent station saturation determining unit 23, and an adjusting unit 24.
The setting unit 21 sets the start threshold voltage of the locomotive energy feeding device of the predetermined traction station to be greater than the traction rectifier no-load voltage of the predetermined traction station by a first set value. The control unit 22 controls the locomotive energy feedback device of the preset traction station to start after the voltage reaches the starting threshold voltage, and the electric energy feedback control is carried out. The adjacent station saturation judging unit 23 judges whether the locomotive energy feeding device of the adjacent traction station adjacent to the predetermined traction station is in an electric energy feedback saturation state. The adjusting unit 24 adjusts the starting threshold voltage of the locomotive energy feeding device of the preset traction station in response to the locomotive energy feeding device of the adjacent traction station being in the electric energy feedback saturation state until the locomotive energy feeding device of the preset traction station is in the electric energy feedback saturation state.
Fig. 6 is a schematic diagram of an electric energy feedback device of a locomotive energy feedback device according to another embodiment of the present application, including a setting unit 21, a control unit 22, an adjacent station saturation determining unit 23, and an adjusting unit 24.
The setting unit 21 sets the start threshold voltage of the locomotive energy feeding device of the predetermined traction station to be greater than the traction rectifier no-load voltage of the predetermined traction station by a first set value. The control unit 22 controls the locomotive energy feedback device of the preset traction station to start after the voltage reaches the starting threshold voltage, and the electric energy feedback control is carried out. The adjacent station saturation judging unit 23 judges whether the locomotive energy feeding device of the adjacent traction station adjacent to the predetermined traction station is in an electric energy feedback saturation state. The adjusting unit 24 adjusts the starting threshold voltage of the locomotive energy feeding device of the preset traction station in response to the locomotive energy feeding device of the adjacent traction station being in the electric energy feedback saturation state until the locomotive energy feeding device of the preset traction station is in the electric energy feedback saturation state.
The adjusting unit 24 includes a local saturation determining module 241, a non-saturation control module 242, a non-critical control module 243, and a critical control module 244.
The station saturation judging module 241 judges whether the locomotive energy feedback device of the predetermined traction station is in an electric energy feedback saturation state. The non-saturation control module 242 determines whether a start threshold voltage of the locomotive energy feed device of the predetermined traction station is greater than a minimum start threshold voltage value in response to the locomotive energy feed device of the predetermined traction station not being in an energy feedback saturation state. The non-critical control module 243 sets the start threshold voltage of the locomotive energy feeding device of the predetermined traction station to be reduced by a second set value in response to the start threshold voltage of the locomotive energy feeding device of the predetermined traction station being greater than the start threshold voltage minimum value, and sets the retention time of the reduced start threshold voltage to a third set value. The threshold control module 244 is responsive to the start threshold voltage of the locomotive energy feed device of the predetermined traction station not being greater than the start threshold voltage minimum value, the start threshold voltage of the locomotive energy feed device of the predetermined traction station remaining unchanged.
The locomotive energy feeding device comprises the electric energy feedback device of the locomotive energy feeding device.
It should be noted that the above-mentioned embodiments described with reference to the drawings are only intended to illustrate the present application and not to limit the scope of the present application, and those skilled in the art should understand that modifications or equivalent substitutions made on the present application without departing from the spirit and scope of the present application should be included in the scope of the present application. Furthermore, unless the context indicates otherwise, words that appear in the singular include the plural and vice versa. Additionally, all or a portion of any embodiment may be utilized with all or a portion of any other embodiment, unless stated otherwise.

Claims (15)

1. An electric energy feedback method of a locomotive energy feedback device comprises the following steps:
setting a starting threshold voltage of a locomotive energy feedback device of a preset traction station to be a first set value larger than the no-load voltage of a traction rectifier of the preset traction station;
judging whether the locomotive energy feedback devices of the adjacent traction stations adjacent to the preset traction station are in an electric energy feedback saturation state or not, wherein the locomotive energy feedback devices of the preset traction station and the locomotive energy feedback devices of the adjacent traction stations are started after the voltages reach respective starting threshold voltages respectively, and performing electric energy feedback control;
and responding to the situation that the locomotive energy feed device of the adjacent traction station is in an electric energy feedback saturation state, and adjusting the starting threshold voltage of the locomotive energy feed device of the preset traction station until the locomotive energy feed device of the preset traction station is in the electric energy feedback saturation state.
2. The method of claim 1, wherein said adjusting an activation threshold voltage of a locomotive energy feed device of said predetermined traction station comprises:
judging whether the locomotive energy feedback device of the preset traction station is in an electric energy feedback saturation state or not;
responding to the situation that the locomotive energy feedback device of the preset traction station is not in an electric energy feedback saturation state, and judging whether the starting threshold voltage of the locomotive energy feedback device of the preset traction station is larger than the minimum value of the starting threshold voltage;
responding to the fact that the starting threshold voltage of the locomotive energy feeding device of the preset traction station is larger than the starting threshold voltage minimum value, setting the starting threshold voltage of the locomotive energy feeding device of the preset traction station to be reduced by a second set value, and enabling the retention time of the reduced starting threshold voltage to be a third set value;
and responding to the starting threshold voltage of the locomotive energy feeding device of the preset traction station not being larger than the starting threshold voltage minimum value, and keeping the starting threshold voltage of the locomotive energy feeding device of the preset traction station unchanged.
3. The method of claim 1, wherein the electric energy regenerative saturation condition comprises a regenerative power of a locomotive energy feed device reaching a rated power or the locomotive energy feed device ceasing to operate.
4. The method of claim 2, wherein the start threshold voltage minimum is greater than the traction rectifier no-load voltage by a fourth set value.
5. The method of claim 1, wherein the first set point is between 10V and 100V.
6. The method of claim 2, wherein the second set point is between 1V and 10V.
7. The method of claim 2, wherein the third set point is between 1 second and 10 seconds.
8. The method of claim 2, wherein the fourth setpoint is between 10V and 30V, and the fourth setpoint is less than the first setpoint.
9. An electric energy feedback device of a locomotive energy feedback device comprises:
the device comprises a setting unit, a control unit and a control unit, wherein the setting unit is used for setting the starting threshold voltage of the locomotive energy feed device of the preset traction station to be a first set value larger than the no-load voltage of a traction rectifier of the preset traction station;
the control unit is used for controlling the locomotive energy feedback device of the preset traction station to be started after the voltage reaches the starting threshold voltage, and performing electric energy feedback control;
the adjacent station saturation judging unit is used for judging whether the locomotive energy feedback devices of the adjacent traction stations adjacent to the preset traction station are in an electric energy feedback saturation state or not;
and the adjusting unit is used for responding to the situation that the locomotive energy feeding device of the adjacent traction station is in an electric energy feedback saturation state, and adjusting the starting threshold voltage of the locomotive energy feeding device of the preset traction station until the locomotive energy feeding device of the preset traction station is in the electric energy feedback saturation state.
10. The apparatus of claim 9, wherein the adjustment unit comprises:
the station saturation judging module is used for judging whether the locomotive energy feedback device of the preset traction station is in an electric energy feedback saturation state;
the unsaturated control module is used for responding to the situation that the locomotive energy feedback device of the preset traction station is not in an electric energy feedback saturated state, and judging whether the starting threshold voltage of the locomotive energy feedback device of the preset traction station is larger than the minimum value of the starting threshold voltage or not;
the non-critical control module is used for responding to the fact that the starting threshold voltage of the locomotive energy feeding device of the preset traction station is larger than the starting threshold voltage minimum value, setting the starting threshold voltage of the locomotive energy feeding device of the preset traction station to be reduced by a second set value, and enabling the retention time of the reduced starting threshold voltage to be a third set value;
and the threshold control module responds to the condition that the starting threshold voltage of the locomotive energy feeding device of the preset traction station is not larger than the minimum value of the starting threshold voltage, and the starting threshold voltage of the locomotive energy feeding device of the preset traction station is kept unchanged.
11. A locomotive energy feed device comprising the electric energy feedback device of the locomotive energy feed device of claim 9 or 10.
12. An electric energy feedback system of a locomotive energy feedback device comprises:
n locomotive energy feed devices according to claim 11, N.gtoreq.2;
and the locomotive energy feeding device carries out inter-station communication between the inter-station switches.
13. The system of claim 12, wherein the switch comprises a process layer switch or a station layer switch.
14. The system of claim 12, wherein the network of inter-site communication is an site control layer network or a process layer network.
15. The system of claim 12, wherein the communication protocol for inter-station communication comprises IEC103 or IEC 61850.
CN201910424471.8A 2019-05-21 2019-05-21 Locomotive energy feedback device and electric energy feedback method, device and system thereof Active CN111645526B (en)

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