JPS62155149A - Control device for output voltage from substation for electric railway - Google Patents

Abstract

PURPOSE:To minimize a power loss, by providing an arithmetic means, which calculates mean voltage of pantograph collecting points by all the electric motor vehicles, and setting output voltage of a self substation on the basis of an output from said arithmetic means. CONSTITUTION:A voltage controller 101, which fetches output voltage and current signals from substations 100A-100C, calculates an optimum output voltage value to be fed to the substation 100B as a voltage setting signal. Then the substation 100B outputs voltage, corresponding to the setting signal from the voltage controller 101B, to each electric overhead line 50A, 50B of up and down electric motor vehicles, and each electric line 50A, 50B is controlled so that it always generates proper voltage for a change of an electric load. Accordingly, a voltage drop by the electric overhead line can be minimized by applying 100% voltage to the electric motor vehicle positioned just below the self substation 100B while preventing a load from being applied to the electric motor vehicles positioned just below the neighboring substations 100A, 100C.

Description

[Detailed Description of the Invention] [Field of the Invention] The present invention relates to an output voltage control device for an electric railway substation,
In particular, an output voltage control device for an electric railway substation that is suitable for making the output voltage of a DC substation variable and setting the optimal output voltage according to the load of the electric car without fully drawing out the performance of the electric car. Regarding.

(Technical background of the invention and its problems) Recent DC electric cars have become non-resistor, and energy saving is being achieved by adopting inverter-controlled 1111m or chopper-controlled cars for the purpose of power regeneration. However, since the substation does not perform voltage control to maintain the appropriate puncture point voltage according to the electrical width load,
For example, there is a problem that the puncture point voltage increases in light-load electric vehicles near the substation, and regenerative braking does not work sufficiently. When there is an electric vehicle running under power, the drop in the puncture point voltage due to the increase in load current leads to a problem in that the motor characteristics deteriorate, that is, the speed of the electric vehicle does not increase. In other words, unless the substation takes measures according to the load, it will not be possible to fully extract the performance of the electric vehicle on its own, so some kind of countermeasure has been required.

[Purpose of the invention]

Therefore, an object of the present invention is to solve the problems of the prior art, and to constantly monitor the pantograph point voltage and control the output voltage so that the pantograph point voltage is appropriate regardless of the load on the electric vehicle. To provide an output voltage control device for an electric railway substation, which makes it possible to fully draw out the ability of an electric car whether the car is in motion or under regenerative braking.

(Summary of the Invention) In order to achieve the above object, the present invention provides for the self-substation and each adjacent substation for at least one electric vehicle load existing on the track in the section between the self-substation and each adjacent substation on both sides. A first calculation means that takes in the output voltage and output current information of the track seed stone and calculates the pantograph point voltage of each electric car, the distance between each adjacent substation and the electric car, and the distance between the own substation and each adjacent substation. , and a second calculation means for calculating the average pantograph voltage of the all-electric vehicle based on the output of the first calculation means;
The present invention provides an output voltage control device for an electric railway utility substation, which includes means for setting the output voltage of the own substation based on the output of the calculation means.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of an output voltage control device for an electric railway substation according to an embodiment of the present invention. As shown in the figure, there are substations 1 adjacent to both sides of the own substation 100B.
00A and 100C are arranged. Each substation 100A,
100B and 100G are up train lines 50A and down trains? 2
50B, and are connected in parallel to the up track 51A and the down track 51B. Inbound electric cars 10A and 10B are inbound electric train line 5
Upward track 51 that acts as a return line while collecting current from 0A
Run on A. On the other hand, the downhill electric car 10C210D runs on the downhill track 51B, which acts as a return line, while collecting current from the downhill electricity 150B. Each substation 100Δ, 100B
, 100C respectively correspond to r? 'tf pressure controller 10
1A, 1018.10 ICs are installed and their respective output voltages are controlled.

In order to take in the voltage and current of each substation 100A, 1008.1000, the voltage control unit 101B of the own substation 100B is sent @1102Δ, 102B.

102C is connected. An output signal line 103B from a voltage controller 101B is connected to the own substation 100B, and its output voltage is set.

Incidentally, although the configuration in FIG. 1 mainly shows the configuration of the own substation 100B, the completely similar configuration is applied to the other substations 100A and 100C, although not shown.

Now, in this configuration, the voltage controller 101B receives output voltage and current signals from the substations 100A to 100C at a one-second period via the signal lines 102A to 102C,
The optimum output voltage value is calculated and sent as a voltage setting signal to the substation 100B via the output signal line 103B. The substation 100B outputs a voltage corresponding to the setting signal from the voltage controller 101B to each of the overhead contact lines 50A.

50B to control each overhead contact line 50A, 50B so that it always has an appropriate voltage in response to fluctuations in electrical load.

FIG. 2 is a dimensional block diagram of the controller 101B shown in FIG. 1. In the figure, a clock generator 20 generates a clock signal with a period of 1 second and sends a sampling signal to a voltage/current input circuit 21.

The voltage and current input circuit 21 receives voltage and current values from the substations 100△, 100B, and 100C at the time of inputting the sampling signal to the lines 102△ and 102B.

102C and hold them until the next sampling signal is input, and send the held signal to the pantograph voltage calculation circuit 22. Panta point voltage calculation circuit 22 is installed at each substation 100A, 100B, 100C.
From each voltage and current in each direction, calculate the pantograph voltage at a total of 4 locations on the substation 100A side, substation 100C side, and up and down lines, and send the result to the substation output voltage calculation circuit 23. Send. The substation output voltage calculation circuit 23 calculates the average voltage using a predetermined calculation formula based on the respective pantograph point voltages outputted by the pantotal voltage h10 circuit 22, and calculates the average voltage using a predetermined calculation formula. Send on 24th. The substation output voltage setting circuit 24 determines whether the average value of the pantograph point voltage is within a certain permissible voltage value, and if this is within the permissible voltage value, maintains the current set voltage. If such a setting signal is outside the allowable voltage value, a setting signal that corrects this is generated and sent to the substation 1.0OB via the temporary delay circuit 25.

Next, the operation of the puncture point voltage calculation circuit 22 will be explained with reference to the circuit diagram of FIG.

In FIG. 3, [2 indicates the output voltage of the own substation 100B, [, E3 indicates the respective output voltages of the substations 100Δ and 100C on both sides. Assume that J3 and electric cars 10A to 10D are located between substations 100Δ and 100C. In this case, P4 is 10A to 10D1 in the upper air.
:J5 point voltage, substation 100Δ, 100
The distance 1 between B and X indicates the distance between the substation 100B and the electric car 1013, and 1.12 indicates the n charge current given to the electric car 10B from the substations 100A and 100B, respectively.

As is clear from FIG. 3, for example, the pantograph point voltage EP,
can be determined from equations (1) and (2).

E E2 = 11 (L x) r + l2Xr...
...(1) EPl = E2-I2 x r ---(
2) Here, r [yo train P250△ or 50 B J
It shows the resistance of the overhead contact line per unit length including N and the track 51Δ or 51B acting as a return line. If X is determined from equation (1) and substituted into equation (2), EPl becomes equation (3).

In the same way (EP2 to EP4 are found, even if you do not know the electric cars 10△ and 100 and the distance N1 from the substation 100B, you can calculate the voltage of the substation and the current for each track pole, that is, for the up line, down line, and left/right direction. If you know the current, you can find the puncture point voltage.

On the other hand, the substation output voltage calculation circuit 23 calculates the puncture point voltage i
t l'2 Pantograph point voltage determined by circuit 22 [1) 1 to E
When P4 is given, 100% voltage is applied to the electric car located directly under the own substation 100B, and 100% voltage is applied to the electric car located directly under the own substation 100B.
Electric cars located directly below 0A or 100C have a voltage of O.
Introducing a common phrase that reduces the output voltage as the so-called electric car moves away from the substation 100B, the output voltage E2 of the substation 100B is expressed as /l), (5), (6) to (find).

First, as an example, the distance 111ix from the substation 100B of the electric car 10B and the distance m+- between the substations 100Δ and 100B.
The weight 9 is set to 1 using equation (4)! ? Ru.

Equation (5) can be added to this equation (4) as X, that is, the weight gl of the point voltage EP1.

......(5) In the same way, the market of pantograph point voltages EP2 to EP4 is 92 to
Since g4 can be obtained, the output voltage E2 of the variable market 100B can be calculated from equation (6) to equation (9) using the average value method.

In this way, it is possible to calculate the optimum variable voltage for the load of the electric vehicle.

Next, the substation output voltage setting circuit 24 sets the optimal substation setting voltage determined by the substation output voltage calculation circuit 23 to obtain sufficient power and regenerative braking performance of the electric vehicle. A permissible range is set, and the set voltage E2 is constantly monitored to see if it is outside the permissible range.If the set voltage E2 is outside the permissible range, corrections are made to bring it within the permissible range. put on.

Incidentally, the maximum allowable voltage EPIIlax set in the substation output voltage setting circuit 24 is the allowable voltage for preventing the regenerative braking ability from becoming cold for the electric vehicle during regenerative braking, while the minimum allowable voltage EP II is an allowable voltage that prevents the running time of a running electric car from increasing due to a decrease in motor voltage-speed characteristics.

In addition, the output voltage setting for the own substation 100B is (
7) Given based on the conditions of Equations 2 to (9), respectively.

EPmin≦EPmax −= (7)
If so, set E2, EP ku E2 ・・・・・・(8)a
If x, then E2-ΔE can be set, and if EP,>E2...(9>1n), then E clove ΔE can be set.

〔Effect of the invention〕

As described above, according to the output voltage control device for an electric railway substation of the present invention, the pantograph voltage of each electric car existing on the track between itself and the substations adjacent on both sides is calculated, Considering the minimization of the output energy of the own substation, the electric cars directly under the own substation are loaded with 100% of the load, and the electric cars directly under the farthest adjacent substation are not loaded, thereby reducing the voltage caused by the contact line. Power loss due to descent can be minimized. In addition, by knowing the substation output voltage and current value for each direction, such as up and down line breaks, there is no need to calculate the positions of electric cars or the number of trains existing on the tracks of the own substation and adjacent substations. It also has the effect of making it easier. Furthermore, since the substation output voltage and current values are input in a relatively short time period, for example, in a one-second period, it is possible to set the optimal substation output voltage according to changes in the electric vehicle.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an output voltage control device for an electric railway substation according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of the voltage controller shown in FIG. 1. FIG. 3 is a circuit diagram for explaining the operation of the configuration shown in FIG. 2. 10A, IOB, 10C, 100...Electric car, 100
A, 1008.100C・'117H place, 101A, l
0IB, 101G...Voltage controller, 50A. 50B...Electrical 1liFA, 51△, 51B...Trajectory, 20...Clock generator, 21...Voltage and current input circuit, 23...Panta point voltage calculation circuit, 23...Substation output Voltage calculation circuit, 24... substation output voltage setting circuit. Applicant's agent Sato-Yuman 1 Figure 10 old

Claims (1)

[Claims] 1. Output voltage of the own substation and each adjacent substation and output for each track type with respect to at least one electric vehicle load existing on the track in the section between the own substation and each adjacent substation on both sides A first calculation means that takes in current information and calculates the pantograph voltage of each electric car, the distance between each adjacent substation and the electric car, the distance between its own substation and each adjacent substation, and the output of the first calculation means. for electric railways, characterized by comprising a second calculation means for calculating the average pantograph voltage of all electric cars based on the above, and a means for setting the output voltage of the own substation based on the output of the second calculation means. Substation output voltage control device. 2. The output voltage of the electric railway substation according to claim 1, wherein the second calculation means calculates the average pantograph voltage for all electric cars based on weighting according to distance. Control device. 3. Claims characterized in that the setting means includes correction means for determining whether or not the output of the second calculation means is within a preset tolerance range, and correcting the output if it is outside the tolerance range. The output voltage control device for an electric railway substation according to item 2.