JP2002369311A - Power supply circuit system and feeder system of electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pass an electric vehicle through a dead section while powering. SOLUTION: In power supply circuits of electric vehicles 10a and 10b for driving induction motors 181 -184 by converting AC power from a pantograph 11 through converters 161 -164 into DC power and then inverting the DC power through VVVF inverters 171 and 172 into AC three-phase power, the converters 161 -164 of both electric vehicles in the power supply system of the pantograph thereof are connected in parallel through cables 21a and 21b on the output side (DC power supply system). When one electric vehicle enters a dead section 2 while powering, it can pass through the dead section 2 while powering because the inverter of that electric vehicle operates using the converter output of the other electric vehicle as a power supply. When the electric vehicles 10a and 10b enter the trolley wires 171 and 172 of different power supplies, they can travel with the power from the trolley wires 171 and 172 without short-circuiting them because the pantographs 11 of both electric vehicles are not connected to the cables.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle power supply circuit and a feeder system for an AC and AC / DC VVVF electric vehicle to pass through a different power supply section (AC-AC or AC-DC) while being powered. It is about.

[0002]

2. Description of the Related Art In an AC electric railway, a three-phase power source is connected to a M-phase power transformer using a Scott transformer or a Woodbridge transformer.
The power is converted from the T-coil winding to two single-phases (M-coordinate and T-coordinate power supplies) having different phases by 90 °. In addition, since the feeder system is continuous, there are power supply matching points in adjacent substations.

[0003] These power supply matching locations are configured such that a pantograph of a train that collects power from a trolley wire can pass through the different power supply without short-circuiting.

[0004] As shown in FIG. 3 in the conventional lines are kept insulated as dead section 2 by inserting the insulating material of FRP or wood like about 8m between the trolley line 1 _1, 1 ₂ of a different power source. Train 10 or the arc is generated when passing through the different power sections, so as not to cause a short circuit between the trolley line 1 _1, 1 ₂ of a different power supply, the dead sections labeled 5 ₁ provided in front of the dead section 2 and Notchiofu see, dead sections labeled 5 ₂ provided in the dead section passing position
Look at the notch on.

[0005] As shown in FIG. 4 in the Shinkansen, trolley wires of different power supply 1 _1, 1 switching section (middle section) of approximately 1km between ₂ provided 4, between the trolley line 1 ₁ and the switching section 4 and the trolley wire Switching breakers CB1 and CB2 are respectively connected between ₁₂ and the switching section 4, and the switching breakers CB1 and CB2 are switched according to the progress of the train 10,
Section 4 is pressurized by T (B) seat power trolley line 1 ₁ of M (A) seat power supply or the trolley line 1 _2, while the train 10 of Notchion is so can pass through.

[0006]

In the case of the above-mentioned conventional line, a driver near the dead section must pass as a notch off according to the dead section sign, which is not suitable for high-speed driving. Also, even when the notch is turned off when passing through the dead section, the auxiliary power etc. remain on, and some arc occurs when moving from the trolley wire to the dead section, so it is necessary to periodically inspect and replace the dead section, Maintenance costs increase. Also, when the pantograph passes through the dead section, the lighting, air conditioning, in-vehicle display, etc. are temporarily stopped, and the service is reduced.

[0007] In the case of the above-mentioned Shinkansen, it is necessary to provide a switching facility at a substation or a feeder section, which increases equipment costs. In addition, the length of the middle section is required to be 1000 m or more in order to switch the power supply according to the running of the vehicle. Further, when the power of the middle section is switched, an instantaneous power failure of 250 ms to 350 ms occurs. Further, since the switching circuit breaker is repeatedly turned on and off each time the vehicle passes, maintenance is required and there are many failures.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle power supply circuit and a feeding system that allow an electric vehicle to pass through a dead section while being powered. And

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a power supply circuit system for an electric vehicle according to the present invention converts a power supply system of a pantograph into a DC power supply system, and In a power supply circuit of an electric car for controlling an induction motor by converting a power supply system into a three-phase AC power supply system, a plurality of pantograph power supply systems are connected in parallel by a DC power supply system after DC conversion.

According to a second aspect of the present invention, a power supply circuit system for an electric vehicle converts a power supply system of a pantograph into a DC power supply system and converts the DC power supply system into a three-phase AC power supply system to control the induction motor. In a power supply circuit of an electric car, a plurality of pantograph power supply systems are connected in parallel by a three-phase AC power supply system after three-phase conversion from a DC power supply system.

[0011] The feeding system according to claim 3 is
According to the power supply circuit system of the electric vehicle according to claim 1 or 2,
An electric vehicle having a pantograph interval equal to or longer than the length of the dead section can pass through the dead section without running an arc without power.

[0012] The feeding system according to claim 4 is
The power supply circuit of the electric train of the Shinkansen is the electric power supply circuit system of the electric vehicle according to claim 1 or 2, and the different power supply matching point of the Shinkansen is a feeding section by a dead section, and the interval of the pantograph is the length of the dead section. The feature is that the above Shinkansen electric car can be driven at high speed without a switching section.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 shows a power supply circuit diagram of a DC parallel connection type of an electric railway for an AC railway according to Embodiment 1 of the present invention. In the figure, 1 ₁ ,
1 _2, trolley line connected with the dead section 2, 10a, 10b is at the head side and tail side electric vehicle VVVF control, electric vehicle 10a, the power supply circuit of 10b is constructed similarly. Electric vehicles 10a, 10b, respectively perform power pull on the primary side 14a of the main transformer 14 via a vacuum circuit breaker 12 through the pantograph 11 from the trolley line 1 ₁ or 1 _2. The interval between the pantographs 11 is set to be equal to or longer than the length of the dead section 2 (8 m for AC, 20 m or 45 m for AC / DC).

[0014] Electric vehicle 10a, the secondary side 14b ₁ ～14B ₄ of the main transformer 14 and 10b is connected to the converter _161-164, converter 16 _1, 16 induction motor for electric vehicle drive ₂ A _first VVVF three-phase inverter 17 ₁ for controlling 18 ₁ , 18 ₂ has a second VV for controlling the vehicle driving induction motors 18 ₃ , 18 ₄ in converters 16 ₃ , 16 _4.
VF three-phase inverter 17 ₂ is connected. And
The output sides (first DC power supply system) of the converters 16 ₁ and 16 ₂ of the electric vehicles 10a and 10b are connected in parallel by a first cable 21a, and the electric vehicles 10a and 10b receive power of the first DC power supply system. I'm trying to get it. Similarly, the output side (second DC power supply system) of converters 16 ₃ and 16 ₄ of electric vehicles 10a and 10b is connected in parallel by second cable 21b, and the electric power of electric vehicles 10a and 10b is supplied to the second DC power supply system. To allow flexibility. That is, the power supply circuits of the electric vehicles 10a and 10b are of a power supply circuit type in which a plurality of pantograph power supply systems are connected in parallel by a DC power supply system after DC conversion.

The main transformer 1 of the electric vehicles 10a, 10b
A converter 16 ₅ for an auxiliary machine is connected to the secondary side 14 b ₅ , and the converter 16 ₅ of the electric vehicles 10 a and 10 b is connected to the secondary side 14 b _5.
Of the electric vehicle 10 are connected in parallel by a cable 22.
A, 10b auxiliary DC power can be exchanged.

The operation of the electric vehicle will be described. now,
The leading and trailing electric cars 10a and 10b are trolley wires 1
₁ side and running by a power running operation to the trolley line 1 _two directions. At this time the electric vehicle 10a, 10b travels both receive power from the trolley line 1 _1. That is, the trolley wire 1 ₁
The single-phase alternating current drawn from the pantograph 11 of the electric cars 10a and 10b is stepped down by the transformer 14 and
It is converted to a DC power supply system in _{1 to} 16 ₄ . Inverter 1
7 ₁ and 17 ₂ convert the DC into a three-phase AC of VVVF to control the induction motors 18 ₁ to 18 _4, and
0b at a predetermined speed.

The electric vehicles 10a, 10
The pantograph 11 of the electric car 10a on the leading side of b is dead center.
When entering the action 2, the rear electric car 10b becomes a trolley.
Line 1 ₁Power can be continuously received from
0a cannot receive power from the trolley wire
You. However, the converters 16 of the electric vehicles 10a and 10b₁
~ 16_FourDC side of the first and second cables 21a, 21a
b, the electric vehicle 10a is connected in parallel.
First and second inverters 17₁, 17_TwoIs the rear electric car 1
0b converter 16₁~ 16_FourDC converted to three-phase
Convert to AC and induction motor 18₁, ~ 18_FourControl.
Therefore, the electric car 10a is connected to the trolley wire 1₁Electric car
10a and 10b can run with power running. Also, ahead
The power supply for auxiliary equipment of the head-side electric vehicle 10a is connected via a cable 22.
Converter 16 of rear electric vehicle 10b_FiveFrom
Therefore, there will be no auxiliary equipment power failure.

[0018] pantograph 11 of the electric vehicle 10a of the top side in the power running operation enters the trolley line 1 ₂ through a dead section 2, electric vehicles 10a and 10b from the trolley line 1 ₂ and 1 ₁ different in strains You will receive power. However, the pantograph 1 of the electric cars 10a and 10b
The power supply system 1 is connected by a DC power supply system after DC conversion, and the pantographs 11 of the electric cars 10a and 10b are not connected by a cable.
b can travel remains running operation without shorting between the trolley line 1 _1, 1 ₂ also supposed to receive power from the trolley line 1 ₂ and 1 ₁ having different lineage.

When the pantograph 11 of the rear electric vehicle 10b enters the dead section 2 in the power running operation, the electric vehicle 10
a is received power from the trolley line 1 _2, but the electric vehicle 1
0b cannot receive power from the trolley wire. However, the first and second inverters 17 ₁ and 17 ₂ of the rear electric vehicle 10b are connected to the first and second cables 21a and 21
1b through the converter 16 _1- of the leading electric vehicle 10a.
16 The DC converted in ₄ is converted to three-phase and induction motor 1
8 ₁ and 〜 18 ₄ are driven. Therefore, even if the electric vehicle 10b enters the dead section 2, the electric vehicles 10a and 10b can run with the power running. Further, auxiliary power trailing side electric vehicle 10b so obtained from the converter 16 ₅ of the top side electric vehicle 10a via the cable 22 does not become an auxiliary power failure.

The pantograph 11 of the rear electric car 10b
There Once in the trolley line 1 ₂ to pass through a dead section 2, electric vehicles 10a, 10b travels by receiving power from the same trolley line 1 _2.

As described above, since the electric vehicles 10a and 10b can pass through the dead section 2 in the power running operation, there is no need to pass the dead section 2 as a notch off according to the dead section sign as in the related art. Therefore, high-speed operation becomes possible.

Embodiment 2 FIG. 2 shows a power supply circuit diagram of a three-phase AC parallel connection type of an electric railway for an AC railway according to Embodiment 2 of the present invention. In the figure, 1
₁ , 1 and ₂ are trolley wires connected by the dead section 2 and 10a and 10b are VVVF-controlled electric cars on the leading and trailing sides, and power circuits of the electric cars 10a and 10b have the same configuration. . Electric vehicles 10a, 10b, respectively perform power pull on the primary side 14a of the main transformer 14 via a vacuum circuit breaker 12 through the pantograph 11 from the trolley line 1 ₁ or 1 _2. The interval between the pantographs 11 is set to be equal to or longer than the length of the dead section 2 (8 m for AC, 20 m or 45 m for AC / DC).

The electric vehicle 10a, the secondary side 14b ₁ ～14B ₄ of the main transformer 14 and 10b is connected to the converter _161-164, guiding the vehicle driving the converter 16 _1, 16 ₂ motor 18 _1, 18 first VVVF three-phase inverter 17 ₁ for controlling the _2, converter 16 _3, 16 ₄ vehicle drive induction motor 18 ₃ to 18 ₄ control the second VVV
F three-phase inverter 17 ₂ is connected. The first inverter 17 _{and one} output side of the electric vehicle 10a and 10b (first three-phase AC power supply system) is connected in parallel with the first cable 23a, the electric vehicle 10a, the first three-phase alternating current 10b To allow flexibility. Similarly, electric cars 10a and 1
Inverter 17 ₂ output side of the 0b (second three-phase AC power supply system) is connected in parallel with the second cable 23b, the electric vehicle 10a, it is as can interchange the second three-phase alternating current 10b. That is, the power supply circuits of the electric vehicles 10a and 10b are of a power supply circuit system in which a plurality of pantograph power supply systems are connected in parallel by a three-phase AC power supply system after three-phase conversion from DC.

The main transformer 1 of the electric vehicles 10a, 10b
A converter 16 ₅ for an auxiliary machine is connected to the secondary side 14 b ₅ , and the converter 16 ₅ of the electric vehicles 10 a and 10 b is connected to the secondary side 14 b _5.
Are connected in parallel by a cable (not shown) so that the auxiliary machine DC power of the electric vehicles 10a and 10b can be exchanged.

The operation of the electric vehicle will be described. now,
The top side electric vehicle 10a and tail side electric vehicle 10b is a running on a trolley line 1 ₁ side trolley line 1 _two directions power running operation. At this time, the electric cars 10a and 10b are connected to the trolley wire _11.
It runs with electric power from. That is, the electric vehicle 10a from the trolley line 1 ₁ is drawn with a pantograph 11 and 10b single-phase AC which is stepped down by transformer 14 converter 16 ₁ to 1
It is converted to DC in 6 _4. The inverters 17 ₁ and 17 ₂ convert this DC into a three-phase AC of VVVF, and
_1, drives to 18 _4, to travel electric vehicle 10a, and 10b at a predetermined speed.

When the pantograph 11 of the electric vehicle 10a at the head of the electric vehicles 10a and 10b in power running operation enters the dead section 2, the electric vehicle 10b on the rear side becomes the trolley line 1
₁ can continue to receive power, but the leading electric car 10a
Cannot receive power from the trolley wire. However, the first and second inverters 1 of the electric vehicles 10a and 10b
The three-phase AC side of 7 ₁ , 17 ₂ is the first and second cables 23
a and 23b, the induction motors 18 ₁ and 18 ₂ of the leading electric vehicle 10a are connected to the rear electric vehicle 10b.
It is driven by three-phase alternating current from the inverter 17 _1.
Therefore, the electric vehicles 10a and 10b can run with the power running. Furthermore, auxiliary power source of the head-side electric vehicles 10a, so obtained from the converter 16 ₅ of trailing side electric vehicle 10b via a not shown cable does not become an auxiliary power failure.

[0027] pantograph 11 of the electric vehicle 10a of the head side in a power running operation enters the trolley line 1 ₂ through a dead section 2, electric vehicles 10a and 10b, power from differing trolley line 1 ₂ and 1 ₁ lineage Will receive. However, the pantograph 11 of the electric cars 10a and 10b
Are connected by a three-phase AC power system after three-phase conversion, and the pantographs 11 of the electric cars 10a and 10b are not connected by a cable, so that the electric cars 10a and 10b have different systems. can travel without also consist lines 1 ₂ and 1 ₁ to receive power to short-circuit between the trolley line 1 _1, 1 _2.

When the pantograph 11 of the rear electric vehicle 10b enters the dead section 2 in the power running operation, the electric vehicle 10
a is received power from the trolley line 1 _2, but the electric vehicle 1
0b cannot receive power from the trolley wire. However, since the three-phase AC sides of the first and second inverters 17 ₁ and 17 ₂ of the electric vehicles 10a and 10b are connected in parallel by the first and second cables 23a and 23b, the rear electric vehicle 10b induction motor 18 _{1-18 4} top side electric vehicle 1
0a are driven by the three-phase AC of the inverters 17 ₁ and 17 ₁₂ . Therefore, the electric vehicles 10a and 10b can run with the power running. Further, since the auxiliary power source of the tail-side electric vehicle 10b is obtained from the converter 16 ₅ of the top side electric vehicle 10a through the unillustrated cable does not become an auxiliary power failure.

The pantograph 11 of the rear electric car 10b
There Once in the trolley line 1 ₂ to pass through the dead sections 2, electric vehicles 10a, 10b travels both receive power from the trolley line 1 _2.

As described above, since the electric vehicles 10a and 10b can pass through the dead section 2 in the power running operation, it is not necessary to pass the dead section 2 as a notch off according to the dead section sign as in the related art.
Therefore, high-speed operation becomes possible.

In the actual visual modes 1 and 2, each electric vehicle has four converters, two inverters, and four vehicle drive motors, and the converted DC power supply system and AC power supply system are provided. Although there are two systems, the present invention is not limited to this. Further, the actual visual modes 1 and 2 are cases where the different power supply section is AC-AC, but when the different power supply section is AC-DC, for example, the circuit for converting the pantograph power supply system into the DC power supply system is described above. A main transformer 14 and converters 16 _{1 to} 16 ₄ are provided, and a DC-DC converter is provided. When the pantograph power supply system is AC, DC conversion is performed by the main transformer 14 and converters 16 _{1 to} 16 ₄ and DC An automatic switching circuit that performs DC conversion by a DC-DC converter is used.

[0032]

(1) The driver can drive without paying attention to the dead section sign, so that the burden is reduced. (2) Since the vehicle can travel with the notch on, it is suitable for high-speed traveling, and an improvement in orientation speed is expected. (3) No power failure of auxiliary equipment power supply, leading to improved service. (4) A power failure of the vehicle power supply due to the passage of the dead section is eliminated, and a sudden flow due to frequent power restoration is eliminated, which is good for the life of the equipment. (5) In the case of a vehicle having a plurality of pandagraphs, one of the pandagraphs can always collect power and can pass through the dead section with power running, so that there is no need to consider the place where the dead section is installed as in the conventional case. . (6) If this method is applied to a Shinkansen, the switching section of the Shinkansen is not required at all, and power running operation can be performed by a dead section equivalent to a conventional line, and an economical Shinkansen feeding system can be constructed.

[Brief description of the drawings]

FIG. 1 is a power circuit configuration diagram of a DC parallel connection system of an electric train for an AC railway according to a first embodiment.

FIG. 2 is a power circuit configuration diagram of a three-phase AC parallel connection type of the electric railway for an AC railway according to the first embodiment.

FIG. 3 is an explanatory diagram of a configuration of a different power supply section of a conventional line according to a conventional example.

FIG. 4 is an explanatory diagram of a configuration of a different power supply section of a Shinkansen according to a conventional example.

[Explanation of symbols]

1 ₁ , 1 ₂ … Trolley wire of different power supply 2… Dead section 10a, 10b… Electric car 11… Pantograph 14… Main transformer 16… Converter 17… VVVF inverter 18… Vehicle drive motor

Claims (4)

[Claims] 1. A power supply circuit for an electric car that converts a power supply system of a pantograph to a DC power supply system, converts the DC power supply system to a three-phase AC power supply system, and controls an induction motor. A power supply circuit system for an electric vehicle, wherein a DC power supply system after DC conversion is connected in parallel. 2. A power supply circuit for an electric car that converts a power supply system of a pantograph into a DC power supply system, converts the DC power supply system into a three-phase AC power supply system, and controls an induction motor. A power circuit system for an electric vehicle, wherein the DC power system is connected in parallel with a three-phase AC power system after three-phase conversion. 3. A power supply circuit system for an electric vehicle according to claim 1 or 2, wherein an electric vehicle having a pantograph interval equal to or more than the length of the dead section can pass through the dead section without running an arc without drawing an arc. Feeding system characterized by doing. 4. A power supply circuit for a Shinkansen electric vehicle according to claim 1 or 2, wherein a different power supply joining point of the Shinkansen is provided with a feeding section by a dead section, and a distance between the pantographs is reduced. A feeding system characterized in that a Shinkansen electric vehicle longer than the length of the dead section can be driven at high speed without a switching section.