CN113937805A - Subway brake regenerative electric energy feedback joint debugging control method and system based on GOOSE communication - Google Patents
Subway brake regenerative electric energy feedback joint debugging control method and system based on GOOSE communication Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
- B60L7/12—Dynamic electric regenerative braking for vehicles propelled by dc motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention discloses a subway braking regenerative electric energy feedback joint debugging control method and system based on GOOSE communication. According to the invention, when the capacity of the energy feedback device of a certain station is insufficient or the station is stopped, the adjacent station energy feedback device can be called through the GOOSE network to support the energy feedback device, and the regenerative braking energy feedback is cooperatively realized, so that the capacity utilization rate of equipment, the stability of direct current network voltage and the overall energy-saving effect can be greatly improved. Especially for a traction substation provided with digital protection, the existing digital current protection GOOSE optical fiber communication network can be reused, and the network construction investment is not required to be increased.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a subway braking regenerative electric energy feedback joint debugging control method and system.
Background
The subway regenerative electric energy feedback device is used for the occasions of absorption and feedback of regenerative electric energy on urban rail transit, and the principle can be briefly described as follows: when the vehicle enters a braking working condition, the kinetic energy of the locomotive is converted into electric energy, and when the electric energy is input into a direct current power grid, the voltage of the direct current power grid is increased. The control unit of the regenerative electric energy feedback device detects the voltage of the direct current power grid in real time, when the voltage of the direct current power grid rises to a certain preset value, an inverter in the regenerative electric energy feedback device starts to work, and redundant electric energy is inverted and fed back to the alternating current power grid.
On the current subway line, the brake regenerative electric energy feedback device is configured in a multi-site large-scale mode. The communication of the current brake regenerative electric energy feedback device in the traction station only supports the station, the station regenerative electric energy feedback device can be communicated with the station comprehensive disc or comprehensive monitoring, but can not be handshake with other station feedback devices, so that the brake regenerative electric energy feedback device can only act in an isolated way and can not cooperate with other station feedback devices. Isolated operation is often restricted by the energy feedback capacity of the station device, when the braking energy of a single station is large, complete feedback of the energy cannot be realized, and direct current network voltage cannot be stabilized; when the braking energy of a single station is small, the waste of the capacity configuration of the energy feeding device can be caused; in addition, when a single station energy feedback device operates in an isolated mode, redundant operation of the station device during failure or shutdown cannot be achieved, and the regenerative electric energy feedback rate is reduced.
Disclosure of Invention
The invention provides a subway braking regenerative electric energy feedback joint debugging control method and system based on a GOOSE network for solving the technical problems.
The invention adopts the following technical scheme.
On one hand, the invention provides a subway brake regenerative electric energy feedback joint debugging control method, wherein the energy feedback devices, the direct current measurement and control devices and the alternating current measurement and control devices of all traction substations realize pairwise cascade connection through a GOOSE optical fiber network; the M-2 th station, the M-1 th station, the Mth station, the M +1 th station and the M +2 th station are sequentially adjacent traction substations, and the control method comprises the following steps:
when the Mth station energy feedback device of the traction substation is in a shutdown state, the Mth station sends an energy feedback device locking signal to the direct current measurement and control device and/or the alternating current measurement and control device of the adjacent Mth station-1 and Mth +1 station through the direct current measurement and control device and/or the alternating current measurement and control device, so that the Mth station-1 and the Mth +1 station which are adjacent to the Mth station send energy feedback device locking signals to reduce the starting threshold value of the energy feedback device and the direct current network voltage control instruction value by a set difference value delta V in response to the energy feedback device locking joint jump signal1；
And if the direct current network voltage of any one of the traction substation from the (M-1) th station and the (M + 1) th station exceeds the starting threshold value of the energy feeding device, the energy feeding device starts inversion. If the direct current network voltage of the station continues to rise after the inversion is started and reaches the joint debugging starting threshold value, the station energy feedback device sends a joint debugging request signal to the energy feedback device which is adjacent to the station M-2 or station M +2 and normally operates, so that the traction substation adjacent to the station responds to the joint debugging request signal to reduce the energy feedback device starting threshold value and the direct current network voltage control instruction value by a set difference value delta V2The set difference value DeltaV2Greater than the set difference Δ V between the M-1 st station and the M +1 st station1；
And if the direct current network voltage of the traction substation reaching the joint debugging starting threshold value falls back below the initial starting threshold value of the energy feedback device, the energy feedback device stops inversion, and sends a joint debugging finishing signal to the traction substations participating in joint debugging, so that the traction substations participating in joint debugging can adjust the starting threshold value of the energy feedback device and the direct current network voltage control instruction value back to the initial set value.
Further, if the energy feeding device of the Mth station recovers from the shutdown state to normal operation, the energy feeding device of the Mth station sends an M station energy feeding device locking return signal to the M-1 st station and the M +1 st station through the inter-station GOOSE network, so that after the M-1 st station and the M +1 st station receive the M station energy feeding device locking return signal, the energy feeding starting direct current network voltage threshold value and the direct current network voltage instruction value of the station are adjusted back to the initial set value.
Still further, the control method further includes:
when the energy feedback device of the Mth station of the traction substation is in a normal operation state and the direct current network voltage of the station exceeds the starting threshold value of the energy feedback device, the energy feedback device starts inversion. If the direct current network voltage of the station continues to rise and reaches the joint debugging starting threshold value, the station energy feeding device sends a first time joint debugging request signal to the M-1 th station and the M +1 th station adjacent to the station energy feeding device, so that the M-1 th station and the M +1 th station respond to the first time joint debugging request signal to reduce the energy feeding device starting threshold value and the direct current network voltage control instruction value by a set difference value delta V1(ii) a If the voltage of the direct current network of the Mth station continues to rise, the Mth station energy feeding device sends a second request joint debugging signal to the Mth-2 station through the M-1 th station adjacent to the Mth station energy feeding device, and simultaneously sends a second request joint debugging signal to the energy feeding device of the M +2 th station through the energy feeding device of the M +1 th station, so that the Mth-2 station and the M +2 th station respond to the second request joint debugging signal to reduce the starting threshold value of the energy feeding device and the control instruction value of the direct current network voltage by the set difference value delta V2The set difference value DeltaV2Greater than a set difference Δ V from the M-1 st station and the M +1 st station1(ii) a And if the direct current network voltage of the Mth station of the traction substation falls below the initial starting threshold value of the energy feedback device, the energy feedback device stops inversion, and the Mth station of the traction substation sends a joint debugging finishing signal to the traction substation participating in joint debugging through the energy feedback device, so that the traction substation participating in joint debugging returns the starting threshold value of the energy feedback device and the direct current network voltage control instruction value to the initial set value.
Further, when the direct current network voltage of the Mth station of the traction substation falls below the initial starting threshold of the energy feeding device and the energy feeding device stops inversion, the Mth station of the traction substation sends a joint debugging ending signal to the traction substation participating in joint debugging so that the traction substation participating in joint debugging returns the starting threshold of the energy feeding device and the direct current network voltage control instruction value to the initial set value, and the specific method comprises the following steps of:
if the direct current network voltage of the Mth station of the traction substation falls below the initial starting threshold value of the energy feedback device, the energy feedback device stops inversion, and the Mth station sends a request joint debugging end signal to the energy feedback devices of the Mth-1 station and the Mth +1 station adjacent to the Mth station through the GOOSE network by using the energy feedback device;
after receiving the request joint debugging finish signal, the M-1 station and the M +1 station adjacent to the M station adjust the energy feed starting direct current network voltage threshold value and the direct current network voltage instruction value of the station back to the initial set value, the M-1 station energy feed device sends the request joint debugging finish signal to the M-2 station energy feed device adjacent to the M-1 station energy feed device, and the M +1 station energy feed device sends the request joint debugging finish signal to the M +2 station energy feed device adjacent to the M station energy feed device; and after the M-2 station and the M +2 station receive the request joint debugging finish signal, the energy feedback starting direct current network voltage threshold value and the direct current network voltage instruction value of the station are adjusted back to the initial values.
In a second aspect, the invention provides a subway brake regenerative electric energy feedback joint debugging system, which comprises energy feeding devices, alternating current measurement and control protection devices and direct current measurement and control protection devices, wherein the energy feeding devices, the alternating current measurement and control protection devices and the direct current measurement and control protection devices are arranged in each traction substation, and the energy feeding devices, the alternating current measurement and control devices and the direct current measurement and control protection devices of the traction substations are in pairwise cascade connection through a GOOSE optical fiber network;
the alternating current measurement and control protection device and the direct current measurement and control protection device are used for sending a locking signal of the energy feeding device to the direct current measurement and control device and/or the alternating current measurement and control device of the M-1 th station and the M +1 th station adjacent to the M-1 th station and/or the alternating current measurement and control device through the direct current measurement and control device and/or the alternating current measurement and control device when the energy feeding device of the traction substation is in an off state, so that the M-1 th station and the M +1 th station adjacent to the M-1 th station reduce the starting threshold value of the energy feeding device and the direct current network voltage control instruction value by a set difference value delta V in response to the locking joint jump signal of the energy feeding device1；
The energy feedback device is used for judging whether the direct current network voltage of any one traction substation of the (M-1) th station and the (M + 1) th station exceeds the energy feedback device starting threshold value, the direct current network voltage of the traction substation continues to rise after the energy feedback device starts inversion and reaches the joint debugging starting threshold value, and the traction substation reaching the joint debugging starting threshold value sends a request joint debugging signal to the energy feedback device which normally operates in the (M-2) th station or the (M + 2) th station adjacent to the traction substation through the energy feedback device, so that the traction substation adjacent to the traction substation responds to the request joint debugging signal to reduce the energy feedback device starting threshold value and the direct current network voltage control instruction value by a set difference value delta V2The set difference value DeltaV2Greater than the set difference Δ V between the M-1 st station and the M +1 st station1；
And if the direct current network voltage of the traction substation reaching the joint debugging starting threshold value falls back below the initial starting threshold value of the energy feedback device, the energy feedback device stops inversion, and sends a joint debugging finishing signal to the traction substations participating in joint debugging, so that the traction substations participating in joint debugging can adjust the starting threshold value of the energy feedback device and the direct current network voltage control instruction value back to the initial set value.
Further, the energy feeding device is also used for the Mth station energy feeding device to be in a normal operation state, if the direct current network voltage of the station exceeds the energy feeding device starting threshold, the direct current network voltage of the station still continuously rises and reaches the joint debugging starting threshold after the energy feeding device starts inversion, the station energy feeding device sends a first time joint debugging request signal to the M-1 th station and the M +1 th station adjacent to the station energy feeding device, so that the M-1 th station and the M +1 th station respond to the first time joint debugging request signal to reduce the energy feeding device starting threshold and the direct current network voltage control instruction value by the set difference value delta V1(ii) a If the direct current network voltage of the Mth station still continues to rise, the Mth station energy feeding device sends a second request joint debugging signal to the Mth-2 station through the M-1 th station adjacent to the Mth station energy feeding device, and simultaneously sends a second request joint debugging signal to the energy feeding device of the M +2 th station through the energy feeding device of the M +1 th station, so that the Mth-2 station and the M +2 th station respond to the second request joint debugging signal to reduce the energy feeding device starting threshold and the direct current network voltage control instruction value by the set difference value delta V2The set difference value DeltaV2Greater than a set difference Δ V from the M-1 st station and the M +1 st station1(ii) a And if the direct current network voltage of the Mth station of the traction substation falls below the initial starting threshold of the energy feedback device and the energy feedback device stops inversion, the Mth station of the traction substation sends a joint debugging finishing signal to the traction substation participating in joint debugging through the energy feedback device, so that the traction substation participating in joint debugging returns the starting threshold of the energy feedback device and the direct current network voltage control instruction value to the initial set value.
The invention has the following beneficial technical effects:
the invention can form redundant configuration of energy feeding devices, realizes reasonable comprehensive utilization and joint debugging control of the energy feeding devices of each traction substation through GOOSE optical fiber network communication, maximizes the overall energy-saving effect of energy feedback on the basis of not increasing the capacity and the number of the energy feeding devices on a line, improves the capacity utilization rate of the energy feeding devices, ensures higher direct current network voltage stability and improves the operation reliability of a full-line energy feeding system.
Drawings
FIG. 1 is a schematic diagram of the overall system components of the present invention, with the reference numbers: 1. a subway brake regenerative electric energy feedback device; 2. a direct current switch cabinet (comprising a direct current measurement and control protection device) on the energy feed branch; 3. an alternating current switch cabinet (comprising an alternating current measurement and control protection device) on the energy feed branch; 4. a GOOSE a network switch in the traction substation 1; 5. a GOOSE B network switch in the traction substation 1; 5. a GOOSE a network switch in the traction substation 2; 6. a GOOSE B network switch in the traction substation 2;
FIG. 2 is a circuit topology diagram of a subway braking regenerative electric energy feedback device;
FIG. 3 is a schematic view of the distribution of five adjacent draw stations along the line;
FIG. 4 is a schematic diagram of an equivalent circuit when the Mth station and its adjacent stations can feed the device joint debugging;
fig. 5 is a flowchart of a control method for normal operation of all energy feeding devices according to a preferred 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 the overall system of the present invention. As shown in fig. 1, the subway brake regenerative electric energy feedback device (which is an energy feedback device) and the ac/dc measurement and control protection device in each traction substation are connected to the GOOSE switch (A, B dual network) of the local station in a GOOSE communication manner, and the GOOSE switches of adjacent stations are cascaded together. But not limited thereto.
Fig. 2 is a circuit topology diagram of a subway braking regenerative electric energy feedback device. The direct current bus is respectively connected with a contact net and a steel rail. The alternating current power grid is a 35kV alternating current bus in the traction substation.
FIG. 3 is a schematic diagram of the distribution of five adjacent drawing stations (M-2, M-1, M, M +1 and M +2 stations) along the line, wherein each drawing station is provided with an energy feeding device, according to the embodiment of the present invention, M-2, M-1, M, M +1 and M +2 stations. Assuming that a certain train is braked at M points, the generated braking power is removed from the parts absorbed by other trains which are being towed, and the remaining part of the power which can be fed back is P.
Fig. 4 is an equivalent circuit diagram of the mth station and its adjacent stations when the energy feeding devices are jointly tuned, wherein:
PMthe power absorbed by the M station energy-feeding device, PMmaxThe maximum continuous power which can be absorbed by the M station energy feeding device; pM±1maxThe definition of (A) is similar.
V-M station direct current network voltage.
VM-1 *-the control command value of the DC voltage of the energy feeding device of the M-1 th station is slightly lower than the threshold value U of the starting DC network voltage of the energy feeding device of the stationM-1thUnder the condition that the feedback power does not exceed the maximum continuous power of the M-1 station energy feeding device, the direct-current voltage of the M-1 station energy feeding device can be stabilized at VM-1 *By lowering UM-1thCan reduce VM-1 *；VM+1 *、VM-2 *、VM+2 *The definition of (A) is similar.
R-line equivalent impedance between the M station and the M-1 station and the M +1 station (the M-1 station and the M +1 station are equivalent to one station in the figure).
Neglecting the line impedance between the locomotive and the M station feeds, discussed in sub-cases below.
The first situation is as follows: the power fed back from the M +1 and M-1 stations does not reach the upper power limit, i.e.
IVM±1 *≤PM-1max+PM+1max (1)
If the DC network voltage is not increased any more, the power balance is required to be kept
I2R+IVM±1 *≤P-PM (2)
Thus, it is possible to provide
The adjacent station can be started only when the M station can feed the maximum continuous output power, i.e. P > PMmax，PM＝PMmaxCan obtain
Therefore, when the M station braking power P is in the interval shown in formula (5), and the adjacent station can feed V of the deviceM±1 *Satisfying the requirement of formula (4), can feed the device through starting adjacent station and come to stabilize direct current net voltage, and adjacent station can feed the device and can not reach full load. According to equation (4), the greater the braking power P or line resistance R, the greater VM±1 *The smaller. Therefore, in the case of P, R being not too large, there is no need to lower V of adjacent stations by joint debugging mechanismM±1 *The direct current network voltage can be limited; however, when P or R is large to some extent, it is necessary to rely on lowering V of adjacent stationM±1 *To limit the dc network voltage.
Case two: in special cases, when the M station energy feeder is stopped and withdrawn, PMWhen it is equal to 0
In this case, it is only necessary to feed the V of the device to the adjacent stationM±1 *And (3) reducing the voltage to meet the requirement of the formula (6), and stabilizing the direct current network voltage at a command value through the adjacent station energy feedback of the phase combination when the braking power meets the requirement of the formula (7). The method is a theoretical basis for realizing the redundant configuration operation of the energy feeding device by the joint debugging system.
Case three: the power fed back from the adjacent station reaches the upper power limit when
Can feed the V of the device by continuously turning down the M-2 th station and the M +2 th stationM±2 *To limit the dc voltage rise, the analysis method is similar to case one. However, due to the limitations of the maximum continuous output power and the line resistance of the M ± 2 th station and the M th station, the farther the station is from the M th station, the smaller the down-regulation space of the dc network voltage command value is, the greater the loss of the feedback power on the line is, and the worse the feedback support effect of the braking power on the M th station is.
Based on the above analysis, fig. 5 is a flowchart of a control method provided in an embodiment of the present application (when all the energy feeding devices operate normally). As shown in fig. 5, the control method includes the following steps.
In the first embodiment, the method for controlling the subway brake regenerative electric energy feedback joint debugging provided by the first embodiment is that when the running state of an energy feeder of a certain station is off, the energy feeder and an alternating current/direct current measurement and control protection device of each traction substation are cascaded in pairs through a GOOSE optical fiber network; the control method comprises the following steps:
the method is characterized in that five adjacent traction substations (the M-2 th station, the M-1 st station, the M th station, the M +1 st station and the M +2 nd station respectively, the M-2 nd station, the M-1 st station, the M th station, the M +1 st station and the M +2 nd station are sequentially adjacent along a line, the total number of the traction substations is not limited to 5 in other embodiments, the M th station is selected from all the traction substations according to actual conditions), an energy feeding device of the M th station is in a shutdown state due to faults or other reasonsIn the state, the energy feeding devices of other stations are in a normal standby state, and the threshold value of the independently started direct current network voltage (namely the starting threshold value of the direct current energy feeding device) is V1thThe DC network voltage control command value is V1 *The starting direct current network voltage threshold value (namely the joint debugging starting threshold value) of the inter-station joint debugging is V2th(V2th＞V1th) The inter-station joint debugging control method specifically comprises the following steps:
the method comprises the following steps: after an energy feeding device of the Mth station is locked, a signal of locking the energy feeding device is sent to an alternating current measurement and control protection device and/or a direct current measurement and control protection device on an energy feeding branch circuit through a hard node, and the alternating current measurement and control protection device or the direct current measurement and control protection device on the branch circuit sends a signal of locking the M station energy feeding device to the Mth-1 station and the Mth +1 station through a GOOSE network between the stations; in order to improve the reliability of the system, an 'energy feeder locking' signal can be sent by the alternating current measurement and control protection device and the direct current measurement and control protection device at the same time.
Step two: after the M-1 station and the M +1 station receive an 'M station energy feed device locking' instruction sent by the M station, the energy feed starting direct current network voltage threshold value of the station is immediately reduced to V1th-ΔV1，(V1thmin≤V1th-ΔV1≤V1th，ΔV1Is estimated from the magnitude of the DC voltage drop generated by the transmission of the regenerative braking power on the line between two adjacent stations, V1thminTo start the lower limit of the DC network voltage threshold value, which is generally slightly larger than the normal operation value of the DC network voltage), the DC network voltage control instruction value of the station is adjusted to V1 *-ΔV1；
Step three: the direct current network voltage of any one of the traction substation of the (M-1) th station and the (M + 1) th station exceeds an energy feedback starting threshold, and after the (M-1) th station or the (M + 1) th station energy feedback device starts inversion, if the direct current network voltage of any one station of the (M-1) th station or the (M + 1) th station cannot be stabilized at a control command value V1 *-ΔV1And continues to rise when station M-1 or station M +1 reaches joint debugging start threshold V2thWhen the joint debugging is started, the traction substation reaching the joint debugging starting threshold sends a joint debugging request signal to an energy feeding device which is adjacent to the traction substation and normally operates in the M-2 th station or the M +2 th station through the energy feeding device,so that the adjacent traction substation responds to the request joint debugging signal to reduce the starting threshold value of the energy feeding device and the direct current network voltage control instruction value by the set difference value delta V2The set difference value DeltaV2Greater than the set difference Δ V between the M-1 st station and the M +1 st station1(ii) a If the M-1 reaches the joint debugging starting threshold value, the energy feeding device of the station sends a signal of 'requesting the first joint debugging' to the M-1 station adjacent to the station; if the M +1 reaches the joint debugging starting threshold value, the energy feeding device of the station sends a signal of 'requesting the first joint debugging' to the M +2 station adjacent to the station;
step four: the M-2 station receives a 'request first joint debugging' instruction sent by the M-1 station, or the M +2 station immediately reduces the energy feedback starting direct current network voltage threshold value of the station to V after receiving the 'request first joint debugging' instruction sent by the M +1 station1th-ΔV2，(V1thmin≤V1th-ΔV2≤V1th，ΔV2Is estimated from the magnitude of the DC voltage drop generated by the transmission of the braking regenerative electric energy on the line between the M-2 station and the M station, and requires Δ V2>ΔV1) Meanwhile, the M-2 station feeds back a 'first joint debugging started' signal to the M-1 station adjacent to the M-2 station or the M +2 station to the M +1 station adjacent to the M-2 station;
step five: the direct current network of the (M-1) th station or the (M + 1) th station is pressed back to the starting threshold value V1thAfter that, the station energy feeding device stops inversion, and simultaneously the M-1 station energy feeding device sends a 'request joint debugging finish' signal to the M-2 station through the GOOSE network, or the M +1 station energy feeding device sends a 'request joint debugging finish' signal to the M +2 station through the GOOSE network;
step six: after the M-2 th station or the M +2 th station receives the signal of 'request joint debugging finish', the energy feedback starting direct current network voltage threshold value of the station is adjusted back to V1thThe DC network voltage command value of the station is adjusted back to V1 *。
In the second embodiment, on the basis of the first embodiment, the present embodiment further includes a seventh step after the sixth step: if the energy feeding device of the Mth station is recovered to normal operation from the shutdown state, the energy feeding device of the Mth station returns the M station energy feeding device to the Mth-1 station and the Mth +1 station through the inter-station GOOSE networkA latch signal; after the M-1 station and the M +1 station receive the 'M station energy feedback device locking' signal sent by the M station, the energy feedback starting direct current network voltage threshold value of the station is adjusted back to V1th1The DC network voltage command value of the station is adjusted back to V1 *。
In a third embodiment, on the basis of the first embodiment, it is set that energy feeding devices in five adjacent traction substations (the M-2 th station, the M-1 th station, the M +2 th station, respectively) along the line are in a normal standby state, and the voltage threshold of the independent starting direct current network of the M-th station is V1thThe DC network voltage control command value is V1 *The starting direct current network voltage threshold value of inter-station joint regulation is V2th(V2th＞V1th) (ii) a The M-1 station and the M +1 station and the M-2 station and the M +2 station are arranged in an adjacent sequence from near to far away from a specific traction substation, and the energy feeding devices of all the traction substations realize pairwise cascade connection through a GOOSEE optical fiber network;
the method comprises the following steps: the method comprises the following steps: in the operation process, the energy feedback devices of all stations independently detect the direct current network voltage value of all stations, and if the direct current network voltage of the Mth station reaches the starting threshold V of the energy feedback device at a certain moment1thIf the station is in a power supply state, the energy supply device of the station is inverted and unlocked to start to supply regenerative electric energy;
step two: e.g. voltage V of the direct current network of the Mth stationMCan not be stabilized at the control command value V1 *And continues to rise when reaching joint debugging start threshold V2thWhen the station needs to be adjusted, the energy feeding device of the Mth station sends a signal of 'request for first joint debugging' to the Mth-1 station and the M +1 station of the two adjacent stations through the GOOSE network;
step three: after the M-1 station and the M +1 station energy feedback devices receive the 'request first joint adjustment' signal sent by the M station, the energy feedback starting direct current network voltage threshold value of the station is immediately reduced to V1th-ΔV1，(V1thmin≤V1th-ΔV1≤V1th，ΔV1Is estimated from the magnitude of the DC voltage drop generated by the transmission of the regenerative braking power on the line between two adjacent stations, V1thminLower threshold for starting the device), the DC network of the station is pressedControl command value down to V1 *-ΔV1Meanwhile, the energy feedback device feeds back a 'first joint debugging started' signal to the Mth station through the GOOSE network;
step four: if the direct current network voltage of the Mth station continues to rise, the Mth station energy feedback device continues to send a 'request for second joint debugging' signal to the Mth-1 station and the Mth +1 station through the GOOSE network, and after the Mth-1 station and the Mth +1 station receive the signal, the instruction is respectively forwarded to the Mth-2 station and the Mth +2 station through the GOOSE network; namely, the M-1 station sends a second request joint debugging signal to the M-2 station, and simultaneously sends the second request joint debugging signal to the energy feeding device of the M +2 station through the energy feeding device of the M +1 station, so that cascade communication with other traction substations is realized by utilizing the energy feeding device through a GOOSE optical fiber network.
Step five: after the M-2 station receives the 'request for the first joint debugging' instruction sent by the M-1 station, and the M +2 station receives the 'request for the first joint debugging as shown in the figure' instruction sent by the M +1 station, the two stations adjust the direct current network voltage threshold value of the station to be fed and started to V1th-ΔV2，(V1thmin≤V1th-ΔV2≤V1th，ΔV2Is estimated from the magnitude of the DC voltage drop generated by the transmission of the braking regenerative electric energy on the line between the M-2 station and the M station, and requires Δ V2>ΔV1) Meanwhile, feeding back a signal of 'second joint debugging is started' to the Mth station through the Mth-1 station and the Mth +1 station;
step six: the direct current network of the Mth station is pressed back to the starting threshold value V1thAfter that, the station energy feedback device stops inversion and simultaneously sends a 'request joint debugging finish' signal to the M-1 station and the M +1 station through the GOOSE network;
step seven: after the M-1 station and the M +1 station receive the 'request joint debugging finish' signal sent by the M station, the energy feedback starting direct current network voltage threshold value of the station is adjusted back to V1thThe DC network voltage command value of the station is adjusted back to V1 *The M-1 station energy feeding device sends a joint modulation request ending signal to the M-2 station energy feeding device adjacent to the M-1 station energy feeding device, and the M +1 station energy feeding device sends a joint modulation request ending signal to the M +2 station energy feeding device adjacent to the M +1 station energy feeding device;
step eight: after the M-2 station and the M +2 station receive the 'request joint debugging finish' signals sent by the M-1 station and the M +1 station, the energy feedback starting direct current network voltage threshold value of the station is adjusted back to V1thThe DC network voltage command value of the station is adjusted back to V1 *。
The fourth embodiment provides a subway brake regenerative electric energy feedback joint debugging system corresponding to the method for controlling subway brake regenerative electric energy feedback joint debugging provided by the first embodiment, wherein the system comprises energy feeding devices, alternating current measurement and control protection devices and direct current measurement and control protection devices which are arranged in each traction substation, and the energy feeding devices, the alternating current measurement and control protection devices and the direct current measurement and control protection devices of the traction substations realize pairwise cascading through a GOOSE optical fiber network;
the alternating current measurement and control protection device and the direct current measurement and control protection device are used for sending energy feeding device locking signals to energy feeding devices of an M-1 th station and an M +1 th station adjacent to the M-1 th station through the direct current measurement and control device and/or the alternating current measurement and control device when the energy feeding device of the Mth station of the traction substation is in a shutdown state, so that the M-1 th station and the M +1 th station adjacent to the M-1 th station reduce the energy feeding device starting threshold value and the direct current network voltage control instruction value by a set difference value delta V in response to the energy feeding device locking signals1；
The energy feeding device is used for judging whether the direct current network voltage of any one traction substation of the (M-1) th station and the (M + 1) th station continues to rise and reaches a joint debugging starting threshold value after the energy feeding device of the station is started, and the traction substation reaching the joint debugging starting threshold value sends a joint debugging request signal to the energy feeding device which is adjacent to the traction substation and normally operates in the (M-2) th station or the (M + 2) th station through the energy feeding device, so that the adjacent traction substation responds to the joint debugging request signal to reduce the energy feeding device starting threshold value and the direct current network voltage control instruction value by a set difference value delta V2The set difference value DeltaV2Greater than the set difference Δ V between the M-1 st station and the M +1 st station1；
And if the direct current network voltage of the traction substation reaching the joint debugging starting threshold falls back below the initial starting threshold of the energy feedback device, the energy feedback device stops inversion, and a joint debugging finishing signal is sent to the adjacent traction substation participating in joint debugging, so that the traction substation participating in joint debugging returns the starting threshold of the energy feedback device and the direct current network voltage control instruction value to the initial set value.
In a fifth embodiment, on the basis of the fourth embodiment, the energy feeding device in this embodiment is further configured to enable the energy feeding device in the mth station to be in a normal operation state, and if the dc network voltage of the station continues to rise to reach the joint debugging start threshold after the energy feeding device in the station is started, the energy feeding device in the station sends a first joint debugging request signal to the M-1 th station and the M +1 th station adjacent to the station, so that the M-1 st station and the M +1 th station respond to the first joint debugging request signal and reduce the energy feeding device start threshold and the dc network voltage control instruction value by the set difference Δ V1(ii) a If the voltage of the direct current network of the Mth station continues to rise, the Mth station energy feeding device sends a second request joint debugging signal to the Mth-2 station through the M-1 th station adjacent to the Mth station energy feeding device, and simultaneously sends a second request joint debugging signal to the energy feeding device of the M +2 th station through the energy feeding device of the M +1 th station, so that the Mth-2 station and the M +2 th station respond to the second request joint debugging signal to reduce the starting threshold value of the energy feeding device and the control instruction value of the direct current network voltage by the set difference value delta V2The set difference value DeltaV2Greater than a set difference Δ V from the M-1 st station and the M +1 st station1(ii) a And if the direct current network voltage of the Mth station of the traction substation falls below the initial starting threshold value of the energy feedback device, the energy feedback device stops inversion, the Mth station of the traction substation sends a joint debugging finishing signal to the traction substation participating in joint debugging through the energy feedback device, so that the traction substation participating in joint debugging returns the starting threshold value of the energy feedback device and the direct current network voltage control instruction value to the initial set value.
The method provided by the embodiment of the application can enable the whole energy-saving effect of energy feedback to be exerted to the maximum on the basis of not increasing the capacity and the number of the energy feedback devices on the circuit, improve the capacity utilization rate of the energy feedback devices and enable the stability of the direct current network voltage to be higher. The method provided by the embodiment of the application can form the redundant configuration of the energy feeding device and improve the operation reliability of the whole-line energy feeding system. The method provided by the embodiment of the application enables all logic interlocking and protection joint tripping in the station to be realized in a GOOSE communication mode, can eliminate a large number of hard node signal wiring between cabinets, reduces the field construction workload, and improves the operation reliability of equipment. The method provided by the embodiment of the application can be used for multiplexing digital current protection to communicate across a GOOSE network of the transformer substation for the subway traction transformer substation equipped with digital protection, and does not need to increase network construction investment.
The embodiment does not change the total capacity and configuration of the energy feedback device, does not additionally increase the construction investment of a communication network, realizes the cooperative operation of the adjacent multi-station energy feedback devices by utilizing an inter-station communication mechanism, achieves the maximization of the regenerative electric energy feedback effect, and makes up for the defects existing in the isolated operation of the energy feedback devices.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and various modifications or changes made with reference to the above embodiments are within the scope of the present invention.
Claims (6)
1. The subway braking regenerative electric energy feedback joint debugging control method is characterized in that energy feedback devices, direct current measurement and control devices and alternating current measurement and control devices of all traction substations are cascaded in pairs through a GOOSE optical fiber network; the M-2 th station, the M-1 th station, the Mth station, the M +1 th station and the M +2 th station are sequentially adjacent traction substations, and the control method comprises the following steps:
when the energy feeding device of the Mth station of the traction substation is in a shutdown state, the Mth station sends an M-station energy feeding device locking signal to the energy feeding devices of the adjacent Mth-1 station and the Mth +1 station through the direct current measurement and control device and/or the alternating current measurement and control device of the Mth station, so that the M-1 station and the Mth +1 station which are adjacent to the M-station energy feeding device reduce the starting threshold value of the energy feeding device and the direct current network voltage control instruction value by a set difference value delta V in response to the M-station energy feeding device locking signal1；
If the direct-current network voltage of any one traction substation of the (M-1) th station or the (M + 1) th station exceeds the starting threshold value of the station energy feeding device, starting inversion of the station energy feeding device; if the direct current network voltage of the station still continues to rise and reaches the joint debugging starting threshold value, the station energy feeding device sends a joint debugging request signal to the energy feeding device which is adjacent to the station and normally operates in the M-2 th station or the M +2 th station, so that the traction substation adjacent to the station responds to the joint debugging request signal to control the starting threshold value of the energy feeding device and the direct current network voltageThe command values are all reduced by a set difference value DeltaV2The set difference value DeltaV2Greater than the set difference Δ V between the M-1 st station and the M +1 st station1；
If the direct current network voltage of the traction substation reaching the joint debugging starting threshold value falls back below the initial starting threshold value of the energy feedback device, the energy feedback device of the station stops inversion, and sends a joint debugging finishing signal to the adjacent traction substation participating in joint debugging so that the traction substation participating in joint debugging returns the starting threshold value of the energy feedback device and the direct current network voltage control instruction value to the initial set value.
2. A subway brake regenerative electric energy feedback joint debugging method as claimed in claim 1, wherein if the energy feeding device of the mth station returns to normal operation from an off state, the energy feeding device of the mth station sends an M-station energy feeding device latching return signal to the M-1 th station and the M +1 th station through the inter-station GOOSE network, so that the M-1 th station and the M +1 th station receive the M-station energy feeding device latching return signal and then adjust the energy feeding start dc network voltage threshold value and the dc network voltage command value of the current station back to the initial set value.
3. The subway brake regenerative electric energy feedback joint debugging control method as claimed in claim 1, further comprising:
when the energy feedback device of the Mth station of the traction substation is in a normal operation state, if the direct current network voltage of the station exceeds the starting threshold of the energy feedback device, the direct current network voltage of the station continuously rises to reach the joint debugging starting threshold after the energy feedback device is started, the station energy feedback device sends a first time joint debugging request signal to the M-1 th station and the M +1 th station adjacent to the station energy feedback device, so that the M-1 th station and the M +1 th station respond to the first time joint debugging request signal to reduce the starting threshold of the energy feedback device and the direct current network voltage control instruction value by a set difference value delta V1(ii) a If the direct current network voltage of the Mth station continues to rise, the Mth station energy feeding device sends a second time joint modulation request signal to the Mth-2 station through the M-1 th station adjacent to the Mth station energy feeding device, and simultaneously sends a second time joint modulation request signal to the energy feeding device of the M +2 th station through the energy feeding device of the M +1 th station, so that the Mth-2 station and the M +2 th station respond to the second time joint modulation request signal to enable the M-2 th station and the M +2 th station to respond to the second time joint modulation request signalThe starting threshold value of the feeder and the direct current network voltage control instruction value are both reduced by a set difference value delta V2The set difference value DeltaV2Greater than a set difference Δ V from the M-1 st station and the M +1 st station1(ii) a And if the direct current network voltage of the Mth station of the traction substation falls below the initial starting threshold value of the energy feedback device, the energy feedback device stops inversion, the Mth station of the traction substation sends a joint debugging finishing signal to the traction substation participating in joint debugging through the energy feedback device, so that the traction substation participating in joint debugging returns the starting threshold value of the energy feedback device and the direct current network voltage control instruction value to the initial set value.
4. A subway brake regenerative electric energy feedback joint debugging method as claimed in claim 3, wherein if the dc network voltage of the mth station of the traction substation falls below the initial start threshold of the energy feedback device and the energy feedback device stops inverting, the mth station of the traction substation sends a joint debugging end signal to the traction substation participating in joint debugging, so that the traction substation participating in joint debugging can adjust the start threshold of the energy feedback device and the dc network voltage control command value back to the initial set value by the specific method:
if the direct current network voltage of the Mth station of the traction substation falls below the initial starting threshold value of the energy feedback device, the energy feedback device stops inversion, and the Mth station sends a request joint debugging end signal to the energy feedback devices of the Mth-1 station and the Mth +1 station adjacent to the Mth station through the GOOSE network by using the energy feedback device;
after receiving the request joint debugging finish signal, the M-1 station and the M +1 station adjacent to the M station adjust the energy feed starting direct current network voltage threshold value and the direct current network voltage instruction value of the station back to the initial set value, the M-1 station energy feed device sends the request joint debugging finish signal to the M-2 station energy feed device adjacent to the M-1 station energy feed device, and the M +1 station energy feed device sends the request joint debugging finish signal to the M +2 station energy feed device adjacent to the M station energy feed device; and after the M-2 station and the M +2 station receive the request joint debugging finish signal, the energy feedback starting direct current network voltage threshold value and the direct current network voltage instruction value of the station are adjusted back to the initial values.
5. The subway brake regenerative electric energy feedback joint debugging system is characterized by comprising energy feeding devices, alternating current measurement and control protection devices and direct current measurement and control protection devices which are arranged in traction substations, wherein the energy feeding devices, the alternating current measurement and control protection devices and the direct current measurement and control protection devices of the traction substations are cascaded in pairs through a GOOSE optical fiber network;
the alternating current measurement and control protection device and the direct current measurement and control protection device are used for sending a locking signal of the energy feeding device to the direct current measurement and control device and/or the alternating current measurement and control device of the M-1 th station and the M +1 th station adjacent to the M-1 th station and/or the alternating current measurement and control device through the direct current measurement and control device and/or the alternating current measurement and control device when the energy feeding device of the traction substation is in a shutdown state, so that the M-1 th station and the M +1 th station adjacent to the M-1 th station reduce the starting threshold value of the energy feeding device and the direct current network voltage control instruction value by a set difference value delta V in response to the locking signal of the energy feeding device1；
The energy feedback device is used for judging whether the direct current network voltage of any one of the traction substation of the M-1 th station and the M +1 th station exceeds the energy feedback device starting threshold value, after the energy feedback device is started, the direct current network voltage of the station continuously rises to reach the joint debugging starting threshold value, the traction substation reaching the joint debugging starting threshold value sends a request joint debugging signal to the energy feedback device which is adjacent to the energy feedback device and normally operates in the M-2 th station or the M +2 th station through the energy feedback device, so that the traction substation adjacent to the energy feedback device responds to the request joint debugging signal to reduce the energy feedback device starting threshold value and the direct current network voltage control instruction value by a set difference value delta V2The set difference value DeltaV2Greater than the set difference Δ V between the M-1 st station and the M +1 st station1；
And if the direct current network voltage of the traction substation reaching the joint debugging starting threshold falls back below the initial starting threshold of the energy feedback device, the energy feedback device stops inversion, and a joint debugging finishing signal is sent to the adjacent traction substation participating in joint debugging, so that the traction substation participating in joint debugging returns the starting threshold of the energy feedback device and the direct current network voltage control instruction value to the initial set value.
6. The subway brake regenerative electric energy feedback joint debugging system according to claim 5, wherein said energy feeding device is further configured to enable the energy feeding device of the Mth station to be in a normal operation state, if the station DC network voltage exceeds the energy feeding device start threshold,after the energy feeding device is started, the direct current network voltage of the station continuously rises to reach a joint debugging starting threshold value, the station energy feeding device sends a first time joint debugging request signal to an M-1 th station and an M +1 th station which are adjacent to the station energy feeding device, so that the M-1 th station and the M +1 th station respond to the first time joint debugging request signal to reduce the energy feeding device starting threshold value and the direct current network voltage control instruction value by a set difference value delta V1(ii) a If the voltage of the direct current network of the Mth station continues to rise, the Mth station energy feeding device sends a second request joint debugging signal to the Mth-2 station through the M-1 th station adjacent to the Mth station energy feeding device, and simultaneously sends a second request joint debugging signal to the energy feeding device of the M +2 th station through the energy feeding device of the M +1 th station, so that the Mth-2 station and the M +2 th station respond to the second request joint debugging signal to reduce the starting threshold value of the energy feeding device and the control instruction value of the direct current network voltage by the set difference value delta V2The set difference value DeltaV2Greater than a set difference Δ V from the M-1 st station and the M +1 st station1(ii) a And if the direct current network voltage of the Mth station of the traction substation falls below the initial starting threshold of the energy feedback device, the energy feedback device stops inversion, and the Mth station of the traction substation sends a joint debugging finishing signal to the traction substations participating in joint debugging through the energy feedback device, so that the traction substations participating in joint debugging adjust the starting threshold of the energy feedback device and the direct current network voltage control instruction value back to the initial set value.
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