JPS6218339A - Direct current feeding device - Google Patents

Abstract

PURPOSE:To improve reliability against a trouble and the like which take place on the electric car line side by configurating a device in such a way that each of sets which combines a breaker with a diode bridge circuit, is provided for each of an up-train line and a down-train line of an electric car respectively so as to allow both power running and regenerative current to flow the said breaker commonly. CONSTITUTION:In two sets of diode bridge circuit is 21 and 41, the cathode side of diodes 22a and 22c, and diodes 42a and 42c, is connected with a power running bus bar 3, and each of thyristers 23 and 43 is connected between each of nodes 24 and 44 on the cathode side of the said diode, and each of nodes 25 and 45 on the anode side of diodes 22b and 22d, and diodes 42b and 42d respectively. Each of parallel circuits which is composed of each of stopper diodes 28 and 48, and each of direct current breakers 30 and 31, is connected with each of the nodes 25 and 45, and the said circuit is connected with a regerating bus bar 29 by way of a standby bus bar 32. And each of following common nodes such as one 26 between the diodes 22a and 22b,one 27 between the diodes 22c and 22d, one 46 between the diodes 42a and 42b, and one 47 between the diodes 42c and 42d, is connected with each of electric car lines 9a, 9b, 10a, and 10b by way of each of direct current breakers 8a through 8d respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to the supply of electric railways, especially AC power.
[Converted into flowing power and supplied as a driving source for electric cars]
Nagareki Electric Railway cL)l@1! Regarding the E device.

B2 Summary of the Invention The invention described in 0 is a power supply device for a DC electric railway, in which the circuit breaker current and the current during regeneration are the same, and the circuit breaker and the diode 0p1) For all combinations, one set is provided for each upstream and downstream electric train track, and each bridge circuit is installed between the commonly connected anode side of the 11th circuit and the regeneration bus. By connecting the direct current VFR road talker in parallel with the standby diode to enable mutual backup, it is possible to significantly improve the reliability of the system in case of accidents on the single lane side, and also to make the regenerative current effective. It can be utilized and also allows for mutual reserves.

C8 PRIOR TECHNOLOGY Conventionally, nine DC substations are installed at reasonable intervals along a railway line and are comprised of one to several sets of converters. However, the DC output m of each converter is connected to a Q DC high-speed circuit breaker dedicated to the converter, and the AC input side of the converter is connected to a common bus conductor. In other words, forward power converter and DC high speed circuit breaker? Is the constant power supply system including one transformer connected in parallel between one DC power station and one DC source? It is being confiscated.

On the other hand, the t* line is divided into sections between adjacent substations and lines, and the sections are f'Lft, and the 111 table line is a high-speed DC high-speed line dedicated to each line! At each flE station, each f'Lc/) nl rail is connected to the negative motherboard via an IT device.

The substations adjacent to the above-mentioned tram lines are configured as a supply circuit for supplying electric power in parallel.

Figure 2 is the traditional sash! In the device, l is AC power? A forward power converter consisting of a thyristor element that converts to DC power,
Is 2 DC power? 3 is a reverse power converter consisting of a thyristor control element that converts into AC power, and 4 a ~
4 d is a cylinuta circuit breaker for power line (hereinafter referred to as 1lf for blade line)
5a to 5d are regeneration diodes.
The anodes 11111M of the diodes 5^ to 5d are connected to the cathodes of the d disconnectors 4a to 4d for the Yuka line, and are collectively connected to the cathodes of the diodes 5a to 5d, so that the regenerative thyristor conduction 66 (hereinafter referred to as a regenerative slow breaker) is connected to the cathodes of the diodes 5^ to 5d. cO
connected to the anode. A cathode of the regenerative circuit breaker 6 is connected to the DC bus 3. A reverse power converter 2 is installed on the DC bus 3.
is connected. 8a-8d DC disconnector, 9a.

9b and 10a, 1 (lb is dead section 11°1
2 for uphill and downhill. 2nd and 3rd. This is the 4th electric single track.

Is it faintly the second figure? Describe the operation. First, the electric power for driving the VT electric car is Trs, and the commercial frequency 1 (not shown) is
A three-phase AC voltage gold transformer (not shown) receives the power through two source-main line AC delay devices (not shown), converts it to an appropriate voltage, and converts it into an LQ DC'1 power. Convert to 1. 21st single edge paths 9a, 9b and 3rd. Fourth
*Supplied to JIL circuits 1 na and 10b. Fourth
Train Ganji xobL: The D4 steam train 13 is driven in the direction of the DC'1 power supplied to the above-mentioned =.

Next, when the electric car 13 is in regenerative operation, the roundworm power is supplied from the 41st lane 10t) to the DC bus 3 via the roundworm diode 5d and the self-generating circuit breaker 6. Stiff bus line 3
The regenerated power t'L* supplied to t'L* is regenerated to, for example, the first train edge 9a to ga train # circuit 10a where the ka-row electric car (not shown) is operated, or it is regenerated by reverse force conversion θ2tbr. hand!
He is infected with roundworms by Minamotofufu.

D1 Among the problems to be solved by the invention, in the L-configured f'L9 conventional train shown in FIG. 2, the forward power converter 1 and the reverse power converter 62 are connected to the DC bus 3? Since the reverse power converter 20 is directly connected in parallel through the reverse parallel connection, there is a problem in that when the reverse power converter 20 fails to commutate, a fault current is supplied to the power converter 1 side and the fault is magnified.

+21 In Fig. 2, if the regenerative circuit breaker is installed 6km, the same problem will occur.

(b) If you try to stop the electricity only in the desired section of the train, it will also stop the electricity on the other adjacent section of the train, so it will be necessary to use the It area flow to carry the electric car. If you try to install only the regenerative circuit breaker 6, the circuit breaker t of the regenerative circuit breaker 6 is the straight R where the circuit breaker 4 a - 4 d is inserted,
If there are 4 electric circuits (double-track circuit holder), the length will be at least four times that of a line breaker.

(c) There, the regenerative ar! In order to reduce the capacity of the frequency converter 6, if the capacity is set to a level that can cut off the current of roundworms, the regenerative circuit breaker 6 will not be able to cut off the extended relay current in the event of an accident. Therefore, it is necessary to cut off all the current flowing to the fault point side at the substation side, which complicates the protection sequence in the event of a fault and reduces the reliability of the system.

2) Since the circuit breakers 4a to 4d for the circuits are inserted in each of the four circuits of the 4-way circuit in the above-mentioned construction, the substation becomes very uneconomical.

(Ho)! Friend, as the IT facility becomes larger, the equipment cost for construction will increase enormously.

Means for solving all the vertices between E1 This invention includes a forward power converter that converts all AC power into DC power, a nine power line bus connected to this forward power converter, and a common connection to this power line bus. Cathode side is connected 2
A set of diode bridge circuits and these two sets of diode bridge circuits! Separately provided are two sets of VFR circuits connected between the commonly connected anode side of the bridge circuit and the cathode side of the power running circuit connected to the green;
The cathodes and anodes of the diodes constituting each side of the two sets of diode bridge circuits are connected in common, and are individually connected to the rt north connection point, and are double-wired? N7 separated by a dead section to form? , rAl, 2nd and 5g3.
A common connection between the fourth #Ls terminal and the two sets of diode bridge circuits A7t Anodes are separately connected to the anode side, and the cathodes are commonly connected and connected to the regeneration bus. two sets of stopper diodes,
This 2. A DC disconnector is connected in parallel to each of the stopper diodes, and is normally open and closed when one of the aPItr units fails, and is connected to the regeneration bus. It consists of a reverse power f converter and tL'ft
-It is something.

21 Effect Even when the above-mentioned L sea urchin extended power supply, only one of the two sets of seat disconnectors was disconnected, and only the Harugun section of the whisper was RA! Even if it stops, the other AM device is in a conductive state, so it is possible to continue the extended power supply to that overhead contact line.

Two sets of diode bridge circuits each have an A disconnector connected in parallel to a stopper diode and a direct G disconnector, and nine circuits and a JT are provided. Even if a ground fault occurs, if the bridge circuit of the faulty overhead contact line is disconnected, fault current will not flow from the other bridge circuit side.

Furthermore, a DC new circuit device 2 is connected in parallel to the stopper diode.
Since all four consecutive mutual reserve systems are possible, one a
＠Even if the device breaks down, it can be connected to one vehicle road through the other breaker r.
8. I can chisel. In addition to the above, the extended power supply current in the event of a fault is quickly cut off by the circuit breaker connected to the fault line, so extension #1t'
There is no need to interrupt the flow at the adjacent substation that supplies the flow to the substation.

G. Embodiment FIG. 1 is a circuit diagram showing an embodiment of the present invention, and the same parts as those in FIG. 2 are given the same reference numerals and will be described.

In FIG. 1, 21 and 41 are arranged in the polarity shown, and four diodes 22a to 224 and 42 are connected to each other.
These are first and second diode bridge circuits composed of circuits a to 42d. The diode 22a*2 in the first and second diode bridge circuits 21 and 41
The cathode sides of 2c and 42a*42c are connected to the row busbar 3. 23 and 43 are the first and second thyristors aF! fra (this current breaker may be a DC high speed transformer breaker), the first and second thyristor breaker 23
and 43, the bus bar 3 for the anode side, that is, the diode 22a.

The cathodes of 22c and 42a + 42e are commonly connected and connected to one point 24 and 44. 1st sentence 1st and 2nd
Cathode side rl of thyristor a disconnectors 23 and 43! The anodes 22b, 22d and 42n, 42d are commonly connected to the power points 25 and 45.

Said @l and second diode bridge times W! t21 and 41 diodes 22a and 22b and 42a and 42h common-A connection point 26 and 46ri DC disconnector 8f3. and 8cg through the first and third electric single tracts 96 and 1naK:
Connected. The diodes 22c, 22a and 42 of the first and second diode bridge circuits 21 and 41
Common dust connection points 27 and 47 of C and 42d are 1 disconnector 8o
and 8dk5r and the 2nd and 4th car rope routes 9b and 10
1).

28 and 48 are stopper diodes, and the anodes 11111 of these diodes 28 and 48 are connected to the respective common connection points 25 and 45, and the cathodes thereof are connected together and connected to the mutual spare bus a32.

A regeneration field a29 is connected to this mutual reserve mother and mausoleum 32. The stopper diodes 28 and 48iC are connected in parallel to the DC disconnectors 30 and 31, respectively. (Lt) The DC disconnectors 30 and 31 are normally open, and are closed when the thyristorm disconnectors 23 and 43 fail. A reverse power converter 2 is connected to the regeneration bus 29. Note that the 5ita force transducer 1 is a diode rectifier, but a thyristor rectifier may also be used.

The operation of the above embodiment will be briefly described.

When the thyristor circuit breakers 23 and 43 are normally left open, the current in the forward power converter 1 is
．． 43→diode 22b, 42n→DC disconnector 8a*
8c? Through the 1st. It is supplied to the third train #il paths 9a, 10a and the second train #il via the thyristor circuit breaker 23.43→diode 22d, a24→DC disconnector 8b, 8d1. It is supplied to the fourth Jl lanes 9b and 10b.

In addition, the ninth regenerative current generated in the first calculator wire W&9a is passed through the DC disconnector 8a → diode 22a → thyristor disconnector 23
→Diode 224→DC cut off! ! Vessel 8b? It is supplied to the second electric train line 9b via the diode 22a → the power line 3 → the thyristor circuit breaker 43 → the diode 42f
i or 42d → DC disconnector 8c or 8d and 3rd or 4th
It is supplied to the overhead contact lines 10a, 111b, or the stopper diode 28°48 (or the DC disconnector 30
．． When 31CQ is closed, the DC disconnector 30.31) and the mutual spare bus 32? The valve is supplied to the regeneration master valve 29. In addition, the 2nd, 3rd and! 41! Similarly, the regenerative current generated on the single lines 9b, 1(la and 10b) flows through the first and second diode bridge circuits 21, 41' and is supplied to each electric train line or regenerative bus #29.

To the above-mentioned process / I! r train Iwaoji 9 a *
9b, 10a, 101), the two sets of first and second thyristor AFL disconnectors 23, 43 can be controlled by simply inserting them in the R direction, so the thyristor disconnector with a high one curve can be used as shown in FIG. There is an advantage that 192 sets of items can be omitted. This makes it possible to fabricate two power supply devices at low cost.

Maku, each tram line 9a * 9b and 10a, lO
Also when controlling the regeneration flow generated at 1.n and 7. Second
Thyristor breaker 23.43 and the first. Diodes 22a to 22d and I of the second diode bridge circuit 21.41
J 42 a to 42 d and stopper diode 28.48
(DC disconnector: 30.31 Open #* can be controlled, which has the advantage of eliminating the need for a regenerative gun Wr device.

Furthermore, both the power running '1 current and the regenerative current are the 1st current. Second thyristor 4I! ? If the AVFR device 23.437 is opened, the 8 disconnection of both IJt flow for power running and regeneration will pass through the thyristor A disconnector 23.43.
This can simplify the purulent retention sequence. This construction uses a thyristor circuit breaker that can shut off both sea urchins and roundworms. When the thyristor ridge breaker 23t is opened at 9 o'clock, the flow is iWr. After that, DC disconnector 8a
T open, thyristor, myfr device 23? If the bottom is opened again, even if the regenerative air car 14 is operated at the second electric power unit a 9h, the roundworm current will be the same as the regeneration bus 29 or the 3rd degree 4'@, IiL: JlWt. 10a, 1n
b VC supply nb. Nao, at the time of the above ground fault accident.
The second diode bridge circuit 21.41 is connected via the stopper diode 28.48 (when DC VTRW& 311, 31 is open) and the mutual spare bus 32. Even if the user vomits, the fault current will not flow through the entire diode bridge circuit of the second thyristor breaker 43. Expansion of f'LK construction accidents? It can be prevented.

The above-mentioned No. 1.42 diode bridge circuit 21°41 and the No. 1.42 diode bridge circuit 21°41. 2nd thyristor circuit breaker 23.43? When using a long wire, select the desired rectangle section (1st, 2nd arm@circuit 94,
9b) When stopping the power supply, all that is required is to open the first thyristor 623g. Extended feed can be continued in the 1-electric section on the 4th ta line IQa, 10b side, making it possible to smoothly transport electric cars.

If an accident occurs at the time of the above extended pay 'd1, then the accident time a
Since the thyristor A disconnector 23 or 43 connected to Vc is used, there is no need to perform an analysis at the adjacent f1 location where the extended DC supply is interrupted. Therefore, the protection sequence can be further simplified, the impact of an accident can be kept to a minimum, and the efficiency of electric vehicle transport can be improved.

Said DC disconnection story 30.31 When the meeting is closed, the first and second
Mutual power transfer between diode bridge circuits,
Since it is a mutual pre-oxygenation system, one of the second thyristor interrupters 23 and 43 must be in a state of failure, for example, even if the first thyristor interrupter 23 is ,
1st.・Kyu 2 straight track 9a, 9b aku no kuni ka line 1
Current power can be supplied. Second thyristor! [543 → stopper diode 48 → pressure reserve m@32 → DC) analyzer 30 → diode 22o or 22d circuit! @I can do electricity.

The tt1 regenerative power is also controlled in the same way.

The effects of the H0 invention have been described above, and this invention VC! A similar effect can be obtained.

^, Extended supply voltage Stop only the desired one electric section for one electric line 7?
, even in the 4th station, there is a 1st section on the other side of the train track.
1 can be continued luxuriously, allowing smooth operation of electric vehicles.

b. In the event of an accident at 1 o'clock in extended supply, the extended supply DC is cut off by a circuit breaker connected to the fault circuit, so the point is to cut it off at the adjacent substation that supplies the entire low-length supply current. do not have. Therefore, the protection sequence can be further simplified and the impact of an accident can be kept to a minimum, thereby improving the operating efficiency of the single-carrier.

C. A direct current circuit that enables mutual standby power supply in parallel to the stopper diode? Since one of the disconnectors is connected, one of the disconnectors breaks down, and the straight line connected to the disconnector breaks down, and the other AM disconnector connects to the DC disconnector. I'm sorry.
Is it possible to improve the reliability of the system itself? can be achieved.

d, compared to the conventional example, a disconnector for regeneration and two sets of 8 for
Since no disconnection is required, the equipment t is very advantageous. Also, since there is no need for a cutting device, the protection sequence becomes cumbersome, so 1g focus is the same as above.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a diagram 11g showing a conventional example. 1... Jundo Rikido Kanki, 2... Gyaku'1 Riki f Kanki, 3.
...Power running m, i, 9a, 9b, 106, 10h-=1st to 48th L single track, 21.41...1st. 2nd diode bridge circuit, 23.43...1st. Second thyristor cutoff 5, 28.48... Stopper diode, 29... Regeneration flL1i1.30.31... DC disconnector, 32... Mutual spare bus bar. Figure 2 Procedural Amendment 0. ,6 June 19, 1988

Claims (1)

[Claims] (1) A forward power converter that converts AC power to DC power,
A power running bus connected to this forward power converter, two sets of diode bridge circuits whose cathodes are commonly connected to this power running bus, and two sets of diode bridge circuits each provided separately for these two sets of diode bridge circuits. two sets of circuit breakers connected between the commonly connected anode side of the bridge circuit and the cathode side connected to the power running bus; and cathodes and anodes of diodes forming each side of the two sets of diode bridge circuits. first, second, third, and fourth electric contact lines each separately connected to a common connection point and separated by a dead section forming a double track;
Two sets of stopper diodes each have their anodes separately connected to the commonly connected anode side of the set of diode bridge circuits, and their cathodes are commonly connected to the regeneration bus bar, and these two sets of stopper diodes DC disconnectors that are connected in parallel and are normally open and are closed when one set of the circuit breakers fails;
A DC power supply device comprising: a reverse power converter connected to the regeneration bus.