CN114937968A - Direct-current ice melting device for electrified railway contact network and control method thereof - Google Patents

Direct-current ice melting device for electrified railway contact network and control method thereof Download PDF

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Publication number
CN114937968A
CN114937968A CN202210547239.5A CN202210547239A CN114937968A CN 114937968 A CN114937968 A CN 114937968A CN 202210547239 A CN202210547239 A CN 202210547239A CN 114937968 A CN114937968 A CN 114937968A
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converter
direct
current
phase
contact network
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CN114937968B (en
Inventor
王翼云
胡海涛
李朝阳
郭小敏
曹彦双
侯晓亮
蔡羽
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Tonghao Changsha Rail Traffic Control Technology Co ltd
Southwest Jiaotong University
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Tonghao Changsha Rail Traffic Control Technology Co ltd
Southwest Jiaotong University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/16—Devices for removing snow or ice from lines or cables
    • 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
    • H02J13/00002—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 monitoring
    • 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
    • H02J13/00036—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 switches, relays or circuit breakers
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

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

Abstract

The invention discloses a direct-current deicing device for an electrified railway overhead line system and a control method thereof. The left converter and the right converter of the direct current ice melting device are connected back to back and are respectively connected to a secondary bus of the traction transformer through an isolation type step-down transformer. The middle direct current sides of the two converters are connected through a breaker. When the device works in a direct-current anti-icing and ice-melting mode, the direct-current ports on the left side and the right side of the device are connected in series through the circuit breakers, and then the positive pole and the negative pole which are connected in series are respectively connected to an alpha uplink contact net and a beta downlink contact net, so that the high-capacity direct-current anti-icing and ice-melting requirements of the contact nets can be met. When the device works in a regenerated energy utilization mode, the direct current ports on the left side and the right side of the device are connected in parallel through the circuit breakers, and the connecting lines are led out to provide grid-connected interfaces for the energy storage and new energy systems, so that the regenerated braking energy of the locomotive can be effectively utilized, and the energy efficiency, the electric energy quality and the reliability of the power supply system of the electrified railway are improved.

Description

Direct-current ice melting device for electrified railway contact network and control method thereof
Technical Field
The invention relates to the field of traction power supply systems of electrified railways, in particular to a direct-current deicing device for an overhead contact system of an electrified railway and a control method thereof.
Background
At present, in an electrified railway traction power supply system, an electric locomotive/motor train unit obtains power from a contact net to supply power to the electric locomotive/motor train unit, and the contact net is completely exposed in an external environment, so that icing is easy to occur in certain low-temperature, high-humidity and high-altitude areas. The normal current taking of the locomotive is influenced by the icing of the contact network, even the power supply network is damaged to cause the power supply interruption, and the normal operation of the electrified railway is seriously threatened. China is vast in breadth, complex and various in terrain, and changeable in climate, and a large number of railway main lines in China and southwest mountain areas face the threat of contact net icing. For example, in the ice and snow disaster of 2008, a plurality of trunk lines in Guizhou, Hunan and the like are subjected to power supply interruption due to icing of a contact network, so that shutdown is caused, and huge economic loss is caused.
In recent years, as the electrified railways in China continuously develop towards high speed and heavy load, the realization of efficient anti-icing and deicing of contact networks becomes a key and technical difficulty for ensuring safe and reliable power supply of the electrified railways in severe environments. At present, the ice coating solution for power transmission lines and railway overhead contact systems at home and abroad mainly comprises a mechanical ice removing method and a thermal ice melting method. The mechanical deicing method mainly comprises scraping deicing and vibrating wires, needs a large amount of human resources, and is long in time consumption, low in efficiency and poor in field operation safety; the thermal ice melting method utilizes joule law, and increases the temperature of a wire by circulating a large current on an ice coating line to achieve the purpose of melting and shedding the coated ice, wherein the circulating large current can adopt alternating current or direct current, and the method is safe and reliable, low in cost and high in operability, so that the method is widely concerned.
The DC ice melting technology is a preferred scheme for solving the ice coating problem of the power transmission line in the power system because the advantages of no need of considering line reactance, small equipment capacity, high ice melting efficiency and the like are adopted. However, since ice coating of the line only occurs in severe weather conditions such as rain, snow and ice in winter and spring, and the ice melting device only works in "skylight" time periods of railway operation, the ice melting equipment is idle for most of the time, and the utilization rate is very low.
Disclosure of Invention
The invention aims to provide a direct-current deicing device for an electrified railway overhead line system and a control method thereof.
The technical scheme for realizing the purpose of the invention is as follows:
a direct-current deicing device for an electrified railway contact network comprises a source storage device; the source storage device comprises a left AC/DC converter and a right AC/DC converter, the alternating current end of the left AC/DC converter is connected to the alpha-phase bus through a left inductor and a left step-down transformer in sequence, the alternating current end of the right AC/DC converter is connected to the beta-phase bus through a right inductor and a right step-down transformer in sequence, and the direct current ends of the left AC/DC converter and the right AC/DC converter are respectively provided with a left capacitor and a right capacitor; the anodes of the left AC/DC converter and the right AC/DC converter are connected and connected to the anode of the energy storage system through a breaker QF5, and the cathodes of the left AC/DC converter and the right AC/DC converter are connected and connected to the cathode of the energy storage system through a breaker QF 6; the circuit breaker QF7 is further included, so that the positive pole of the left AC/DC converter is connected to the positive pole of the right AC/DC converter through QF7, and the positive pole of the left AC/DC converter is connected to the positive pole of the energy storage system through QF 5; the circuit breaker QF8 is further included, so that the negative pole of the left AC/DC converter is connected to the negative pole of the right AC/DC converter through QF8, and the negative pole of the right AC/DC converter is connected to the negative pole of the energy storage system through QF 6; the anode of the left AC/DC converter is also connected to the cathode of the right AC/DC converter through a breaker QF 11; the negative pole of the left AC/DC converter is also connected to an alpha-phase uplink contact network through a disconnecting switch QS9 and a breaker QF9 in sequence, and the positive pole of the right AC/DC converter is also connected to a beta-phase downlink contact network through a disconnecting switch QS10 and a breaker QF10 in sequence.
The control method of the device comprises the following steps,
step 1: judging whether the contact network is on traffic or not, if not, continuing;
step 2: if the external environment temperature T of the contact net is less than or equal to 0 ℃, continuing;
and 3, step 3: the direct-current ice melting device works in a direct-current anti-icing and ice melting mode, and the method specifically comprises the following steps:
3.1 breaking QF5 and QF 6;
3.2, disconnection: a breaker QF1 from an alpha-phase bus to an alpha-phase downlink contact network, a breaker QF2 from the alpha-phase bus to an alpha-phase uplink contact network, a breaker QF3 from a beta-phase bus to a beta-phase uplink contact network, and a breaker QF4 from the beta-phase bus to a beta-phase downlink contact network;
3.3, closing: an isolating switch QS5 of the alpha-phase uplink contact net and the beta-phase uplink contact net, an isolating switch QS6 of the alpha-phase uplink contact net and the alpha-phase downlink contact net, an isolating switch QS7 of the alpha-phase downlink contact net and the beta-phase downlink contact net, and an isolating switch QS8 of the beta-phase uplink contact net and the beta-phase downlink contact net;
3.4 opening QF7, QF8 and closing QF 11;
3.5 closure QS9, QS10, closure QF9, QF 10;
and 3.6 setting the direct-current side voltage reference values of the left AC/DC converter and the right AC/DC converter as the ice melting voltage.
The further technical proposal also comprises that,
and 4, step 4: judging whether the overhead contact system is iced, if so, enabling the direct-current deicing device to continuously work in a direct-current anti-icing and deicing mode; if not, the direct current ice melting device is switched to a regenerative braking energy utilization mode;
and 5: judging whether the overhead contact system is on the bus or not, if not, enabling the direct-current ice melting device to continuously work in a direct-current anti-icing and ice melting mode; if so, converting the direct-current ice melting device into a regenerative braking energy utilization mode;
the direct-current ice melting device is converted into a regenerative braking energy utilization mode, and the method specifically comprises the following steps:
4.1 disconnect QF9, QF10, disconnect QS5, QS7, QS9, QS 10;
4.2 close QF7, QF8, open QF 11;
4.3 closed QF1, QF2, QF3 and QF 4;
4.4 setting the DC side voltage reference value of the left side AC/DC converter and the right side AC/DC converter as the initial voltage.
According to a further technical scheme, the method also comprises a step 4.3' between the steps 4.3 and 4.4; the step 4.3' is: keeping QS6, QS8 closed; alternatively, QS6, QS8 are opened, QF5, QF6 are closed; alternatively, QS6, QS8 are kept closed, and QF5, QF6 are closed.
Compared with the prior art, the invention has the beneficial effects that:
1. the direct-current ice melting device is based on an existing source storage device of a line, and when the direct-current ice melting device works in a direct-current ice preventing and melting mode, the high-capacity direct-current ice preventing and melting requirements of a contact network can be met.
2. After the direct-current ice melting device is converted into a regenerative braking energy utilization mode, the regenerative braking energy of the locomotive can be effectively utilized, and the energy efficiency, the electric energy quality and the reliability of a power supply system of the electrified railway are improved.
3. The control method of the direct-current ice melting device is simple and easy to implement, the two working modes are switched according to needs in real time, the utilization rate of equipment is high, and the occupied area and the economic cost for setting the new ice melting device are saved.
Drawings
Fig. 1 is a schematic structural diagram of a traction power supply system full-line installation direct-current ice melting device.
Fig. 2 is a flow chart of the device switching between two operating modes.
FIG. 3 is a schematic diagram of system connections when the device is operating in DC anti-icing and de-icing mode.
FIG. 4 is a schematic diagram of the system connection when the device is in a regenerative braking energy utilization mode.
FIG. 5 is a schematic diagram of a data processing and control system of the apparatus.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The direct-current deicing device for the overhead contact system of the electrified railway, provided by the invention, can meet the requirements of high-capacity direct-current deicing and deicing of the overhead contact system, effectively utilize the regenerative braking energy of the electric locomotive, improve the energy efficiency and the power supply reliability of the system and improve the electric energy quality of the system. The device can be switched between a direct-current anti-icing and ice-melting mode and a regenerative braking energy utilization mode in real time according to needs, so that the utilization rate of equipment is improved, and the investment cost is saved.
As shown in fig. 1, from the whole view, a set of dc ice melting device needs to be configured in each traction substation, the device takes electricity from the 27.5kV bus on the secondary side of the traction transformer, and the zoning substations are arranged between the traction substations, and the ice melting devices of each traction substation operate independently. The device can contain a hybrid energy storage system inside, and new energy resources (such as wind power and photovoltaic) along the line are accessed according to the line condition.
Viewed individually, the internal ice melting device can be divided into a left converter and a right converter which are identical, and each converter comprises an alternating current side inductor, a direct current side capacitor and a bridge circuit composed of controllable devices (such as IGBT and IGCT). The alternating current side inductor plays a role in filtering, the direct current side capacitor plays a role in stabilizing voltage, and a bridge circuit composed of controllable devices can be switched on and off through the SPWM control device to form direct current output with controllable voltage values.
Specifically, a left converter and a right converter of the device are connected back to back and are respectively connected to a secondary side 27.5kV bus of a traction transformer through an isolation type step-down transformer. When the circuit works, the isolated step-down transformers on two sides of the back-to-back converter step down the 27.5kV single-phase high-voltage alternating current into single-phase low-voltage alternating current (such as 1500V), and then the single-phase low-voltage alternating current is rectified into direct current with different voltage levels through the converter, the direct current side in the middle of the converter is connected through a circuit breaker, and the direct current side outputs and is connected with a voltage stabilizing capacitor in parallel. When the device works in a direct-current anti-icing and ice-melting mode, the direct-current ports on the left side and the right side of the device are connected in series through the circuit breakers, and then the positive pole and the negative pole which are connected in series are respectively connected to an alpha uplink contact net and a beta downlink contact net. When the device works in a regenerated energy utilization mode, the direct current ports on the left side and the right side of the device are connected in parallel through the circuit breaker, and a connecting wire is led out to provide a grid-connected interface for an energy storage and new energy system; in addition, the left and right side up-going and down-going power supply arms are respectively connected to an output feeder of a 27.5kV bus through a disconnecting switch and a breaker.
According to the control method of the device, the data processing and control system controls the corresponding circuit breaker and the isolating switch according to the feedback signal of the catenary environmental parameter monitoring unit so that the source storage-ice melting device works in different modes. As shown in fig. 2, the specific implementation steps are as follows:
step one, judging whether a line is communicated in a short time according to an on-board positioning device and a running chart;
if so, enabling the device to work in a regenerative braking energy utilization mode; otherwise, the next step is carried out.
And step two, starting the contact network environmental parameter monitoring unit.
Step three, judging the external environment temperature T at the moment according to a feedback signal of a temperature sensor in the contact network environment parameter monitoring unit;
if T is less than or equal to 0 ℃, entering the next step; otherwise, the external environment temperature is continuously compared.
And step four, detecting the switching-on and switching-off states of each breaker and each disconnecting switch in the device, and switching the switching-on and switching-off states into a direct-current anti-icing and ice-melting mode, wherein a specific switching-off operation process comprises the following steps:
4.1 if the new energy system and the energy storage system are in a grid-connected operation state, disconnecting the breakers QF5 and QF6 on the intermediate direct current side lead-out connecting line, and stopping the operation of the new energy system and the energy storage system;
4.2 disconnecting feeder circuit breakers QF1, QF2, QF3 and QF4 output by the traction substation;
4.3, closing isolating switches QS5, QS6, QS7 and QS8 to form an uplink and downlink parallel direct-current ice melting loop;
4.4 disconnecting the breakers QF7 and QF8 at the middle direct current side of the back-to-back converter, closing the breaker QF11, and changing the direct current ports of the single-phase converters at the two sides of the back-to-back converter from parallel connection to series connection;
4.5, isolating switches QS9 and QS10 are closed, circuit breakers QF9 and QF10 are closed, and a back-to-back converter direct current series connection port supplies power to a contact net.
Step five, starting the data processing and control system, and setting the voltage reference value of the middle direct current side of the back-to-back converter as the ice melting voltage U dc0 And the device works in a direct-current anti-icing and ice-melting mode of the contact network.
And step six, judging the icing condition of the contact network by combining the networking meteorological data information and the contact network state video camera according to a sensor feedback signal in the contact network environmental parameter monitoring unit. If the contact net is iced, the states of the circuit breakers and the isolating switches are unchanged, and the device continues to work in a direct-current anti-icing and ice-melting mode; otherwise, entering step eight.
And seventhly, judging whether the line is communicated in a short time according to the positioning device on the vehicle and the running chart of the vehicle. If not, the states of the circuit breakers and the isolating switches are not changed, and the device continues to work in a direct-current anti-icing and ice-melting mode; if yes, go to step eight.
Step eight, detecting the switching-on and switching-off states of each breaker and each isolating switch in the device, and switching the switching-on and switching-off states to a regenerative braking energy utilization mode, wherein the second switching-off operation process comprises the following specific steps:
8.1 open the breakers QF9, QF10, disconnect the disconnectors QS5, QS7, QS9, QS10, and separate the alpha and beta supply arms by means of electric phase splitting;
8.2, closing the breakers QF7 and QF8 at the middle direct current side of the back-to-back converter, disconnecting the breaker QF11 and connecting the direct current ports of the single-phase converters at the two sides of the back-to-back converter in parallel;
8.3 closing output feeder circuit breakers QF1, QF2, QF3 and QF4 of the traction substation;
8.4 this step can be performed selectively: the isolating switches QS6 and QS8 where the subareas are located are kept closed, and the tail ends of the uplink and downlink lines run in parallel, so that the grid voltage fluctuation at the tail ends of the power supply arms can be reduced; or disconnecting isolating switches QS6 and QS8 where the subareas are located, closing circuit breakers QF5 and QF6 on the connecting line led out from the middle direct current side, and realizing grid-connected operation of the new energy system and the energy storage system; or, the disconnecting switches QS6 and QS8 where the subareas are located are kept closed, the circuit breakers QF5 and QF6 are closed, the tail ends of the uplink and downlink lines run in parallel, and the grid-connected running of the new energy system and the energy storage system is realized.
Step nine, starting the data processing and control system, and setting the reference value of the voltage at the middle direct current side of the back-to-back converter as an initial voltage U dc1 The device operates in a regenerative braking energy utilization mode.
FIG. 3 is a schematic diagram of system connections when the device is operating in DC anti-icing and de-icing mode.
In the figure, by taking CTMH-150 type contact wires and JTMH-120 type carrier cables as an example, the equivalent direct current resistance of the line is about 5 omega when the ice melting loop is formed by connecting an upper contact line and a lower contact line in series according to the length of a single power supply arm of 25 km. At the moment, the ice melting current required for realizing the direct current ice melting is 1000A, so the series ice melting voltage is 5000V, and the voltage reference value of the middle direct current side of the back-to-back converter is set as the ice melting voltage U due to the symmetrical structure of the left and right converters dc0 And when the voltage is 2500V, the device works in a direct-current anti-icing and ice-melting mode of a contact net. During working, the ice melting current and the ice melting voltage can be controlled in real time according to the external environment condition, and effective ice prevention and efficient ice melting in an ice coating state under a low-temperature condition are realized.
When the device works in a direct-current anti-icing and ice-melting mode, the energy storage system and the new energy system quit operation. Therefore, when the source storage-ice melting device in the traction power substation does not comprise an energy storage system or a new energy system, the device can still be used for DC ice prevention and ice melting.
FIG. 4 is a schematic diagram of the system connection when the device is in a regenerative braking energy utilization mode.
Setting the reference value of the voltage at the middle direct current side of the back-to-back converter as an initial voltage U dc1 And (3) detecting the voltage value and the current value of the alpha and beta power supply arms in real time, calculating to obtain the instantaneous power of the power supply arms on two sides, realizing power interaction of the two arms by controlling the four-quadrant operation of the back-to-back converter, balancing the active power of the two arms and reducing the negative sequence of the system.
According to a system energy management strategy, regenerative braking energy on one power supply arm is transmitted to a traction locomotive on the other power supply arm for use, and residual regenerative braking energy is stored in an energy storage system, or during the operation of close traffic on a line, the energy storage system is controlled to release energy to the power supply arm, and a new energy system is controlled to provide energy to the power supply arm, so that the energy conservation and consumption reduction of a traction power supply system are realized, and the energy utilization efficiency is improved.
If the capacity of the back-to-back converter is remained, the reactive power and negative sequence compensation functions are started, and the current with the same amplitude and the opposite phase with the reactive power and harmonic current measured by the power supply arm is output through the converter, so that the comprehensive management of the quality of the electric energy is realized.
FIG. 5 is a schematic diagram of a data processing and control system of the apparatus.
Wherein, according to the sensor feedback signal in the contact net environmental parameter monitoring unit, judge whether start direct current anti-icing, ice-melt function, specifically do:
1) the contact network environmental parameter monitoring unit comprises a temperature sensor, a humidity sensor and a wind speed sensor, and the three sensors are used for respectively detecting the temperature, the humidity and the wind speed conditions in the environment where the contact network is located;
2) and converting the detection result of the sensor into a specified signal, feeding the specified signal back to the data processing and control system, and combining the networking meteorological data information and the contact network state video camera to judge the icing condition of the contact network and send a corresponding control instruction.
3) Because the voltage of the direct-current output end of the back-to-back converter is controllable, the ice melting voltage can be controllably adjusted according to the ice coating state of the line, and then the line passes through short-circuit currents with different sizes, so that effective ice prevention under low-temperature conditions and efficient ice melting in the ice coating state are realized.

Claims (4)

1. A direct-current deicing device for an electrified railway contact network comprises a source storage device; the source storage device comprises a left AC/DC converter and a right AC/DC converter, the alternating current end of the left AC/DC converter is connected to the alpha-phase bus through a left inductor and a left step-down transformer in sequence, the alternating current end of the right AC/DC converter is connected to the beta-phase bus through a right inductor and a right step-down transformer in sequence, and the direct current ends of the left AC/DC converter and the right AC/DC converter are respectively provided with a left capacitor and a right capacitor; the anodes of the left AC/DC converter and the right AC/DC converter are connected and are connected to the anode of the energy storage system through a breaker QF5, and the cathodes of the left AC/DC converter and the right AC/DC converter are connected and are connected to the cathode of the energy storage system through a breaker QF 6; the circuit breaker QF7 is characterized in that the circuit breaker QF7 is included, so that the anode of the left side AC/DC converter is connected to the anode of the right side AC/DC converter through QF7, and the anode of the left side AC/DC converter is connected to the anode of the energy storage system through QF 5; the breaker QF8 is further included, so that the cathode of the left side AC/DC converter is connected to the cathode of the right side AC/DC converter through QF8, and the cathode of the right side AC/DC converter is connected to the cathode of the energy storage system through QF 6; the anode of the left AC/DC converter is also connected to the cathode of the right AC/DC converter through a breaker QF 11; the negative pole of the left AC/DC converter is also connected to an alpha-phase uplink contact network through a disconnecting switch QS9 and a breaker QF9 in sequence, and the positive pole of the right AC/DC converter is also connected to a beta-phase downlink contact network through a disconnecting switch QS10 and a breaker QF10 in sequence.
2. The control method of the direct-current deicing device for the overhead contact system of the electrified railway of claim 1, comprising,
step 1: judging whether the contact network is on the traffic, if not, continuing;
step 2: if the external environment temperature T of the contact net is less than or equal to 0 ℃, continuing;
and step 3: the direct-current ice melting device works in a direct-current anti-icing and ice melting mode, and the method specifically comprises the following steps:
3.1 breaking QF5 and QF 6;
3.2 disconnection: a breaker QF1 from an alpha-phase bus to an alpha-phase downlink contact network, a breaker QF2 from the alpha-phase bus to an alpha-phase uplink contact network, a breaker QF3 from a beta-phase bus to a beta-phase uplink contact network, and a breaker QF4 from the beta-phase bus to a beta-phase downlink contact network;
3.3, closing: an isolating switch QS5 of the alpha-phase uplink contact network and the beta-phase uplink contact network, an isolating switch QS6 of the alpha-phase uplink contact network and the alpha-phase downlink contact network, an isolating switch QS7 of the alpha-phase downlink contact network and the beta-phase downlink contact network, and an isolating switch QS8 of the beta-phase uplink contact network and the beta-phase downlink contact network;
3.4 opening QF7, QF8 and closing QF 11;
3.5 closure QS9, QS10, closure QF9, QF 10;
and 3.6 setting the direct-current side voltage reference values of the left AC/DC converter and the right AC/DC converter as the ice melting voltage.
3. The method for controlling the device for melting ice in a direct current of an overhead line system of an electrified railway of claim 2, further comprising,
and 4, step 4: judging whether the overhead contact system is iced, if so, enabling the direct-current ice melting device to continuously work in a direct-current anti-icing and ice melting mode; if not, the direct-current ice melting device is switched to a regenerative braking energy utilization mode;
and 5: judging whether the overhead line system is on, if not, enabling the direct-current ice melting device to continuously work in a direct-current anti-icing and ice melting mode; if yes, the direct current ice melting device is switched to a regenerative braking energy utilization mode;
the direct-current ice melting device is converted into a regenerative braking energy utilization mode, and the method specifically comprises the following steps:
4.1 disconnect QF9, QF10, disconnect QS5, QS7, QS9, QS 10;
4.2 close QF7, QF8, open QF 11;
4.3 closed QF1, QF2, QF3 and QF 4;
4.4 setting the direct current side voltage reference value of the left side AC/DC converter and the right side AC/DC converter as the initial voltage.
4. The control method of the device for melting ice in a direct current of an overhead contact system of an electrified railway according to claim 3, characterized in that between the steps 4.3 and 4.4, the method further comprises the step 4.3';
the step 4.3' is as follows: keeping QS6, QS8 closed; alternatively, QS6, QS8 are opened, QF5, QF6 are closed; alternatively, QS6, QS8 are kept closed, and QF5, QF6 are closed.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102195260A (en) * 2011-05-29 2011-09-21 西南交通大学 Power-frequency online anti-icing de-icing method for electrified railway contact network
CN107215246A (en) * 2017-05-22 2017-09-29 北京千驷驭电气有限公司 Contact net intelligence ice melting system
CN112260199A (en) * 2020-09-28 2021-01-22 北京交通大学 Online ice melting system and method for rail transit alternating current
CN112260198A (en) * 2020-09-28 2021-01-22 北京交通大学 Multifunctional rail transit direct-current online ice melting system and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102195260A (en) * 2011-05-29 2011-09-21 西南交通大学 Power-frequency online anti-icing de-icing method for electrified railway contact network
CN107215246A (en) * 2017-05-22 2017-09-29 北京千驷驭电气有限公司 Contact net intelligence ice melting system
CN112260199A (en) * 2020-09-28 2021-01-22 北京交通大学 Online ice melting system and method for rail transit alternating current
CN112260198A (en) * 2020-09-28 2021-01-22 北京交通大学 Multifunctional rail transit direct-current online ice melting system and method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JUNYU CHEN等: "An Energy Storage System for Recycling", 《IEEE TRANSACTIONS ON POWER DELIVERY》 *
胡海涛等: "电气化铁路"源-网-车-储"一体化供电技术", 《中国电机工程学报》 *

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