JPS59194643A - Energy accumulation controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention stores energy in the flywheel when there is surplus power on the overhead contact line, and uses the energy S to release the stored energy when there is a power shortage. An example of this type of conventional device relating to @-control side 1 installation will be explained with reference to FIG. In the figure, 1 is a direct current @ open circuit such as a contact line, 2 is a grounding wire, 3 is a switch, 4 is a power converter in which a gate turn-off thyristor is used as a switching element, and 5' is a , 41, 6 is the flywheel.

Next, the 1rh work will be explained. When there is a surplus of regenerative energy from a vehicle running roundworms, or when there are few accidents in the vehicle and there is plenty of power available, the surplus DC power of this product is used as direct current. It is supplied from 1 to Kankitsu Kairaku 4, converted to alternating current energy, and given to Kai 4 and 5.
This becomes stored energy for the induction machine 5 and flywheel 6. At this time, it operates as an electric motor.

On the other hand, when there are many moving vehicles and a large amount of power is required, such as during rush hours, the auxiliary energy stored in these is discharged, and the induction reform 5 is used as a single power generation unit for power conversion. Wrestling I
It is converted to DC power through the Pl line 4 to compensate for the voltage drop in the overhead line.

Figure 2 is a diagram explaining the @ construction of the induction machine 5 and conversion circuit 4.
(a) is a diagram showing the operating point of the electric motor when energy is stored when the induction machine 5 operates as an electric motor.

In this case, the conversion circuit 4 is operated at a higher frequency than the frequency of the electric motor, and the electric motor is operated with slip SA and accelerated with a torque corresponding to operating point A.

FIG. 2(b) is a diagram showing the operating point of the generator when the induction machine 5 is operated as a generator and releases energy, and the Kameriki Henimi circuit 4 is operated at a frequency lower than the frequency of the generator. is,
@Tun → Tsui is operated with slip SB, and is decelerated by l with the torque corresponding to @1 point B.

FIG. 3 is an example showing the operation mode of the induction machine 5 and the flywheel 6. Now, if the total GD of the induction machine 5 and flywheel 6 is 11.280 (Kq+a), the rotational speed will vary from 2,300 (rpm) to 3.300 (rpm).
) The energy that can be stored until reaching ) is 86 (MJ)
=24 (kwh). This energy is 3.000
(kw) of energy supplied for a total of 30 seconds. If the number of poles of the induction machine 5 is chosen to be 2, the frequency of the variable ring loop 4 (ri 2.300 Cγp m ) is @38.3 (
Hz), 3.300 (rpm), it is 55 (Hz).

When the DC voltage of the DC generator 1 is 1.500 (V), the AC heart pressure of the induction machine 5 is 0.78 x 1.5 Q
0CV)=1.170CV].

When the induction machine 5 operates as a turtle machine when storing energy, the electric motor is accelerated from O rotation, but at this time the mineral power conversion circuit 4 is controlled by high frequency modulation control, and its output '
The voltage changes almost in proportion to the rotation speed of the city moving rock. The rotation speed of Kame@machine is from 2.300 (rpm) to 3.300 (rpm)
Energy is stored during the acceleration to m, ), but at this time the voltage of the induction machine is kept almost constant. That is, it is operated at constant output. On the other hand, the period during which the rotational speed is decelerated from 3.300Crpm to 2.300Crpm is used as an energy release region, and the voltage of the induction machine is kept almost constant at this time as well. The rotation speed is from 1300[:γp m) to 3.
In the region of 300 (rpm), the output waveform of the conversion equipment 4 becomes a rectangular wave voltage of a 6-pulse pressure inverter.

In this manner, in the conventional device, energy is stored and released using the same amount of energy. Further, the conversion circuit 4 is 3.
000 [kw) 30 Caecl rating is required, and there is a drawback that a switching element such as a gate turn-off thyristor forming the power conversion circuit 4 must have a large capacity.

The present invention eliminates the drawbacks of the conventional devices described above, and aims to reduce the capacitance of switching elements such as gate turn-off circuits conveniently used in power conversion circuits. The storage energy standard value setting means, the energy conversion force standard value setting means which is a reference plane larger than the reference plane, and the energy conversion force standard value setting means, which are set respectively, are set so that the first shift of the energy conversion force becomes the conversion force. The present invention is characterized in that it has means for controlling the half-body switching element of the force change circuit.

Hereinafter, a pair of embodiments of the present invention will be explained with reference to FIG. According to the figure, 1 to 6. It has the same components as Figure d Hawk 1. 11
is a reactor, 12v and a capacitor convert energy; Raku 4
Configure the output filter for Reference numerals 13 to 18 are gate turn-off thyristors (hereinafter referred to as GTO), and 19 to 24 are diodes, which constitute a tortoise force conversion circuit 4. 25 is a DC current detector, 26 is a DC IT pressure detector, 27 is a multiplier,
Its output corresponds to the transformation power of the transformation device 4. Reference numeral 2B denotes an energy storage central force standard 1 direct setting means, and 29 denotes an energy release central force 4 quasi-directly installed means, in which the stock energy concentration reference value is set to be smaller than the released power reference value. For example, the barge force is 1.000 (scw) compared to 3.000 (scw).
kw] or less. 30 is a switch to set the energy storage power standard 1 to energy storage 'stop/gin', 31 is a switch to set the kai threat power base 1 shift at energy I dusk, and 32 is the output from the H'Mt controller. corresponds to the required slip frequency Δf of the induction machine 5. 33 is speed if
The detector outputs the luck of induction 1, 5, 1, 1, and 1, and the result is fo.
This and the required frequency △f are calculated by h, f o + Δ
f=fs is output from the controller. A generator 35 generates a frequency of fs corresponding to the output of the frequency controller 34, and a gate pulse generator 36 generates a gate pulse according to this frequency.
13 to 183 are activated.

Next, the movement I/¥: of the present invention will be explained with reference to FIG. 5.6.

Figure 5 (1: Operation waveform diagram during energy storage operation)
The phase voltage (a) given to the induction machine 5, which is the electric motor, is the 6-pulse inverter rectangular voltage from the power conversion 1!2I Raku 4 (a), and the current (b) is the phase voltage (,
) later than. At this time, most of the current flows through GT013-18 (C), and a small amount of current flows through diodes 19-24.

45+(B) is a diagram of the resistance produced during an energy attack, and the generator current lags behind the generated voltage (, ) of the induction machine 5 by a phase angle φ, but this φ is 90°. (b), which is larger than 1800 and is close to 1800.

For this reason, most of the starting point 4 Ichi flow is the diodes 19 to 2.
The flow to 4 (d), and the flow to 1 flowing to GTO13-1B is small (c).

Now, if the induction machine flow is Io and the induction machine power factor is Minoh, then
The current IF1 flowing through GT013-1 and the current IR flowing through diodes 19-24 are respectively expressed by the following equations.

Figure 6 shows GT for the power factor of induction machine 5, 013-1B.
FIG. 3 is a diagram showing the relationship between the current sharing of the currents IF and IR of the diodes 19 to 24; Assuming that the power factor of the V motor during energy storage is 90 degrees, 95% of the dynamic current flows through the GTOs 13 to 18, and the remaining 5 electric currents flow through the GTOs 19 to 24.

On the other hand, if the force 4 generated during energy attack is 90%, 95% of the generator current flows through diodes 19 to 24.
The remaining five generator currents flow through GTOs 13-18.

The present invention focuses on this relationship, and when storing energy, the GTO
By significantly suppressing the current flowing through the
This reduces the capacity of TO.

Now, when energy is released, 1000 (kW) (1
, 500[:V)), 2.000(A)) 4) Assuming that energy is required and the generator power factor at the time of energy release is 90ch, the effective value of the fundamental wave current of the generator current is: 1,3 5 X O,9. The current ■2 flowing through the GTO is: 1, 6 4 6 X 0.4 5 X O,05=
3 7 CA) The current flowing through the diode ■□ is 1.6.46 x 0.45 x 0.95 = 704 [A]
becomes. In this way, the current rating required for GTO is 3
7 [A] would be fine. However, if 3.000 [kw] of energy is stored at the time of energy storage, the GTO must bear +tj tit k of 704(A). Therefore, when energy is stored, it is 1.0
If the energy of 00 Ckw) is stored, the current flowing through the GTO will be 1/3, 234 [A], and the current rating of the GTO will be reduced accordingly.

Therefore, in the present invention, as shown in Figure @4, energy storage power standard 1ii28, energy release power standard value 29
and set those standard values as the stored power standard; direct 28 is 1
．． 000 (kw), energy standard 1] Ren 29 is 3. OO
OCkw: Set to l. Then, when storing energy, close the switch 30 and open the 1.000 [kW] standard).
Output of multiplier 27 (actual conversion force of d force commutative circuit 4)
The power controller 32 calculates the required slip force Δf of the induction machine 5 from . This value Δf and the actual operating frequency fo of the induction machine 5 are added by the frequency controller 34, and the GTO of the force conversion circuit 4 is controlled according to the added frequency fs. ,
1.000 (kw) of energy is stored from the DC feeding circuit 1.

On the other hand, when energy is released, the swing 31 is closed; 3.
000 (kw) power standard: direct is set, this signal and multiplied by 4? The required slip frequency of the induction machine 5 is calculated from the output of S27 (force change: q rank 4 longevity 1 festival change +% power)
f is operated by the power controller 32. Thereafter, as in the case of energy release, the operating frequency fs is determined via the frequency controller, and the GTO of the power conversion circuit 4 is controlled. The kinetic energy stored in the flywheel 6 rotates the generator (induction machine 5), is converted into DC power by the power conversion circuit 4, and is output to the DC feeding circuit 1. Therefore, when the energy is high, the conversion force in the power conversion circuit is small compared to when the power is released, so the current flowing through the semiconductor switching element 1 of the conversion conversion circuit becomes small. As a result, a small-sized semiconductor switching element can be used.

The converted power during energy storage is smaller than when attacking. In order to store the same amount of energy as the released energy, the storage time will be longer than the released energy, and the operating time of the power conversion circuit will also be longer, but this will not impair the energy storage effect. .

As explained above, the present invention controls the semiconductor switching element of the power conversion circuit so that the energy storage vehicle force becomes smaller than the released power, or the current flowing through the semiconductor switching element during energy storage becomes smaller. This has the effect that a semiconductor switching element with a smaller capacitance can be used for switching purposes, and the rating of its gate drive circuit can also be reduced.

[Brief explanation of the drawings] Fig. 1 shows a conventional energy 4=4 device;
Figure 2.3 (d is an explanatory diagram of the operation of Figure 1, Figure 4 is a circuit diagram of one implementation of the present invention!+11, and Figure 45.6 is an explanatory diagram of the operation of the present invention. 1... DC power conversion circuit, 4...Lt, force conversion circuit, 5...induction machine, 6...flywheel,
25-...DC current detector, 26...DC voltage,
1. broiler, 28... energy storage release force reference setting means, 291.・Energy ivy power standard setting means,
34...-/71] calculator, 36... gate pulse generator. In the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 IAI (13) 1. Indication of incident ¥f Gansho 58-68559ぢ2
0 Name of invention Enerya Energy Storage II: Susenl Device 1
・3.For those making amendments 5.Detailed explanation of the invention in the specification subject to amendment (■1) 6.Contents of amendment (2) On page 10, lines 7 to 8, "1 power exchange circuit" is corrected to "power conversion circuit."

Claims (1)

[Claims] An inductive T &
In the energy storage equipment connected to the energy storage device, the energy storage 4-5 force standard 1 direct setting means, the energy release power standard/direct setting means whose reference value is larger than the base value, and the mental force standard set at the valley. An energy storage control value/vagator having means for controlling a semiconductor switching element of the power change circuit so that the first shift becomes a power change force.