JPH0496605A - Substation transition controller for linear motor railroad - Google Patents

Abstract

PURPOSE:To suppress fluctuation of train speed by feeding the thrust coil of a train, which makes transition on the feeder section from upstream substation to downstream substation, with power in parallel from substations on the opposite sides thereby increasing the feeder current on the downstream side by an amount corresponding to the decrease on the upstream side. CONSTITUTION:Power is fed from feeders 4, 3 of an upstream substation 1 and a downstream substation 2 to the thrust coil of a train 8 traveling in the direction of an arrow, respectively, through a plurality of sections 7. When a train sensor 21 and a position sensor 22, disposed along a rail, detect that the train 8 has entered into a transit section 7n, a transition control section 105 provides a control switching command to the speed control sections 102, 2O2 in the substations 1, 2 Furthermore, a current restriction command is fed to the current distribution control section 103 in the substation 1 and, at the same time, a coil section switch 6 is closed to restrict the feeder current IA to be fed from the substation 1 thus feeding a restricted current IB from the substation 2. According to the constitution, substation transition control is carried out easily and the border of feeder can be set arbitrarily.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a substation crossing control device for a linear motor railway, and more particularly, to a substation crossing control device for a linear motor railway, in which a propulsion coil of a linear motor is divided into a number of sections. are arranged along the trajectory in the form of
The present invention relates to a substation crossing control device for a linear motor railway in which substations that supply power to propulsion coils are arranged at a plurality of locations along a track at intervals longer than the intervals between sections.

(Prior art) Conventional substation crossing control in ground-to-next linear synchronous motor-driven railways divides feeders at substation boundary points, and supplies current to that point when the train crosses this boundary point. The value of the current being supplied is transmitted from the upstream substation that was previously supplying power to the downstream substation that is newly supplying power, and the downstream substation continues to supply power to trains based on this value. This allows the train to run continuously.

This will be explained in more detail with reference to FIG.

There is a boundary point 5 between the upstream substation 1 and the downstream substation 2.
Feeders (feeding lines) 3 and 4 are arranged along a track (not shown). The upstream substation 1 and the feeder 3 are connected via a substation sending switch 9, and similarly the downstream substation 2 and the feeder 4 are connected via a substation sending switch 10. Further, at the boundary point 5, both feeders 3 and 4 are connected via a feeder classification switch 11. The feeder classification switch 11 is provided as a means for electrically connecting the feeder 3 and the feeder 4, that is, as an extension, and is normally left open. On the other hand, sections 7 in which the armature of the linear motor is divided into appropriate lengths are arranged along the track, and each section 7 is connected to the nearest point of the feeder 3 or 4 via a coil division switch 6. has been done. A field magnet, which together with an armature consisting of section 7 constitutes a linear motor, is mounted on train 8.

The train 8 currently running from the upstream substation 1 side to the downstream substation 2 side is moving to the section 7 closest to the boundary point 5 among the sections connected to the feeder 3.
Next section 7゜+ connected to feeder 4 from
1, when viewed from the substation side, it means crossing from upstream substation 1 to downstream substation 2. Therefore, this will be referred to as "substation crossing." In this substation crossing, current is initially supplied to the section 7 from the upstream substation 1 via the substation sending switch 9, the feeder 3, and the coil division switch 6.

On the other hand, among the sections connected to feeder 4,
The section 7n+1 closest to the boundary point 5 will be supplied with current from the downstream substation 2 via the substation output switch IO, the feeder 4 and the coil division switch 6°+1.

(Problem to be Solved by the Invention) In the above case, if the supply current IA from the upstream substation 1 and the supply current IA from the downstream substation 2 are different, the armature section 7 will be A large acceleration/deceleration current flows, causing rapid speed fluctuations in the train 8, making the ride uncomfortable for passengers.

Therefore, in order to match the values of current I and current IB as much as possible, the value of current IA is transmitted as information from upstream substation 1 to downstream substation 2, and immediately after passing to downstream substation 2, It is also conceivable to control so that I B - I A. However, the value of this current IA is constantly fluctuating because the train, ie the motor, is controlling the speed, so it is difficult to determine the specific value of the current ＾. It is quite difficult to match the values of current IA and current 18.

Furthermore, in the above transfer method, when transferring between substations, a highly accurate current setting value is transferred from the upstream substation 1 to the downstream substation in order to match the output currents II8'B before and after the transfer of both substations 1 and 2. 2, an inter-substation transmission device capable of high-speed transmission is required, and a control means is also required to match the flow values of both types. Furthermore, there is a restriction that the location for crossing between substations must be a location where the feeders of both substations can be electrically separated.

The present invention provides a substation crossing control device for linear motor railways that does not require high speed signal transmission between substations when crossing substations, and can arbitrarily set the location of the crossing between substations. The purpose is to provide.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, in the crossing control device of the present invention, the propulsion coil of the train crossing from the upstream substation to the adjacent downstream substation is connected to the substations on both sides. connection means for parallel feeding from the upstream substation, and a connection means for attenuating the supply current from the upstream substation and attenuating the supply current from the downstream substation when the current of the propulsion coil passes from one substation to the other substation. A control means for controlling the current to a value corresponding to the current combined with the supply current from the upstream substation or a current command corresponding to the speed command; The present invention is characterized by comprising means for opening the connection means for parallel feeding.

(Function) The drive power source of the ground-next linear synchronous motor is controlled so that a sine wave current synchronized with the back electromotive force of the linear synchronous motor flows through the armature. Therefore, the thrust of the linear synchronous motor is proportional to the product of its back electromotive force and armature current (output current of the drive power source).

In that case, a variable voltage/variable frequency output (VVVF) power converter is used as the drive power source.

Train speed control is the control that determines this thrust, and commands the output current of the power converter as the output.

Therefore, the power converter acts as a current source and is controlled so that the output current matches the commanded current value.

Therefore, as shown in Fig. 2, each section 7 receives current I
By transiently superimposing current 1 and current 8 and instructing them to flow, the total current I flowing in section 7 can be set to lo-IA+IB. Here, fA' RfB is the resistance value of feeders 3 and 4 from each substation to section 7, and LrA' Lf
Similarly, B indicates inductance. Also, section 7
is shown isometrically consisting of a resistance R, an inductance, and a back emf e.

Therefore, as shown in Fig. 3, when the current IA from the upstream substation 1 is decreased in section 7n, the current IB from the downstream substation 2 is simultaneously increased, so that IA + IB - IO is always constant. If the current IB can be controlled so that the train 8 can run with the same thrust, it is possible to prevent sudden speed fluctuations during crossing.

Therefore, before reducing the current IA at the upstream substation 1, the output current IB is set to IB-0 to stand by while the current IB is allowed to flow from the downstream substation 2.

When the train 8 reaches section 7, the current IA is reduced at the upstream substation 1, and at the same time the speed control system is switched from the upstream substation 1 to the downstream substation 2. The system raises the current IB to compensate for the reduction in thrust due to the decrease in the current IA so as not to worsen the riding comfort. By doing so, even when a new substation is installed, changes in thrust force, that is, sudden speed fluctuations, can be avoided, and deterioration of riding comfort can be prevented.

(Example) Hereinafter, the present invention will be explained in detail with reference to FIG.

The running speed pattern issued from the running speed command control unit 101 of the upstream substation 1 is transmitted to the speed control unit 102 of its own system and downstream in the form of a speed command for position or a speed command for time regarding speed control of the train 8. It is sent to the traveling speed command control unit 201 of the side substation 2 system.

This command speed is sufficient for transmission with a relatively long cycle time on the order of several seconds, and there is no need for very high-speed transmission.

In the upstream substation 1, the speed control unit 102 sends a current command to the current distribution control unit 1 in accordance with the received traveling speed pattern so as not to adversely affect riding comfort, thrust fluctuations, etc.
Send on 03. The current distribution control unit 103 transmits the current command from the speed control unit 102 as is to the power converter 104 unless there is a reduction request from another system. Power converter 1
04 according to the current command from the current distribution control section 103,
Controls the current supplied to section 7.

On the other hand, the control device on the downstream substation 2 side is basically configured similarly to the control device on the upstream substation 1 side, and includes a traveling speed command control section 201, a speed control section 202, and a current distribution control section 203. and a power converter 204.

The running position of the train 8 is detected by a train sensor 21 and a position detection device 22 that are appropriately arranged along the track, and the detection signal is transmitted to the crossing control section 105 of the control devices on both sides. The transfer control unit 105 sends a speed switching command to the speed control units 102 and 202 on both sides to control substation crossing, and also sends a current throttling command to the current distribution control unit 103 of the upstream substation 1. put out.

The control device of each substation confirms the train position detected by the position sensor 21 and the position detection device 22, and then sets the substation crossing control location so that the train can cross the section 7.
Before entering the downstream substation 2, turn on the substation sending switch 10 and request the power converter 204 of the downstream substation 2 to prepare for passage, and after entering the crossing section 7, the upstream entrance substation A request is made to the current distribution control unit at station 1 to switch speed control from upstream substation 1 to downstream substation 2. As a result, in the corresponding crossing section 7, as shown in Figure 3, when the train approaches, the current I from the upstream substation 1 is
From the state where A is the full current, that is, I o-1^, on the other hand, the current IA is turned off and attenuated, and the condition of ■o-IA+■B, that is, IB''
“I.

While controlling so that the condition IA is satisfied, the current IB from the downstream substation 2 is maintained at the time the train 8 leaves section 7, or the full current. -・I
Commutate the current so that it becomes B.

Therefore, if the substation sending switch 9 on the upstream substation 1 side is opened by the crossing control after the train 8 enters the next section 7n+1, the substation crossing control is completed.

In the device shown in FIG. 1, only one train can enter between the upstream substation 1 and the downstream substation 2 if the train density is high. For example, as shown in FIG. 4, there are third and fourth substations 2a and 2b downstream of the downstream substation 2.
four trains 8a, 8b, 8
o, 8. For example, when the second substation 2
It will no longer be possible for two trains to enter between the substation and the third substation 2. Therefore, a feeder division switch 11.11a, 11. between each adjacent feeder, respectively. If the third train 8 completes the crossing from the second substation 2 to the third substation 2, then the feeder By leaving the division switch 11 1 open, the train 85 can be run from the second substation 2 to the point of the division switch 11 2 .

In this way, by providing a feeder division switch between adjacent feeders and configuring both feeders to be able to be freely connected to and separated from each other, more effective substation crossing can be realized.

〔Effect of the invention〕

According to the present invention, substation crossing control can be performed using a simple timing signal without installing a high-speed numerical data transmission device between substations, and furthermore, since substation crossing can be performed at any point, Substation boundaries can be set arbitrarily, making it possible to achieve more stable substation crossings and more efficient use of travel routes.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an equivalent circuit diagram during parallel feeder power supply, and Fig. 3 is a time chart showing the commutation state between both substations when crossing substations. , FIG. 4 is a connection diagram showing an example in which a feeder division switch is provided between adjacent feeders, and FIG. 5 is a diagram for explaining a conventional substation crossing. 1... Upstream substation, 2... Downstream substation, 3, 4
...Feeder, 5...Boundary, 6...Coil classification switch, 7...Section, 8...Train, 9,10
...Substation sending switch, 11.1-, 11b-
Feeder classification switch, 21... Train sensor, 22...
...Position detection device, 101, 201...Traveling speed command control section, 102, 202...Speed control section, 103
, 203...Current distribution control unit, 104°204...
- Power converter, 105...transition control section. Applicant's agent: Sato - Yurai Hiroshi

Claims (1)

[Claims] A propulsion coil of a linear motor is arranged along a track in a form divided into a large number of sections, and a substation that supplies power to the propulsion coil is arranged at intervals longer than the intervals between the sections. In the substation crossing control device for linear motor railways, which is installed at multiple locations along the track, the propulsion coil of the train passing from the upstream substation to the adjacent downstream substation is connected to the substations on both sides. connection means for parallel feeding; when the current of the propulsion coil passes from one substation to the other substation, it attenuates the supplied current from the upstream substation and attenuates the current supplied from the downstream substation; The supply current of
a control means for controlling the current combined with the current supplied from the upstream substation to a value corresponding to a current command commensurate with the speed command; 1. A substation crossing control device for a linear motor railway, comprising means for opening a connection means for parallel feeding.