JP2007049855A - Power supply system for electrical equipment inside tunnel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply system for electric equipment in a tunnel which can suppress the usage amount of commercial electric power during daytime to supply stable electric power at a lower cost. <P>SOLUTION: The power supply system 1 for electrical equipment 6 in a tunnel covers the electric power used in a tunnel. The system comprises a wind power generator 3, a power-storing secondary battery 4, which charges the electric power received from the electric power generated by the wind power generator 3 and a commercial power supply 7 or discharges the charged electric power to be supplied to the electrical equipment 6 in a tunnel, and a control means which charges the power-storing secondary battery 4 by adjusting the amount of electric power received from the commercial electric power supply 7, within the range of an allowable peak amount of electric power, and discharges the electric power from the power-storing secondary battery 4, when the supply amount of electric power combining the amount of the electric power generated by the wind power generator 3 is less than the amount of the electric power consumed by the electrical equipment 6 in a tunnel, or charges the amount of electric power generated by the wind power generator 3 into the power-storing secondary battery 4, when there is enough margin, with the electric power supplied from the commercial power supply 7 prevented from exceeding the peak amount of electric power. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power supply system for electrical equipment in a tunnel, and is particularly applied when a commercial power source, a power generation device using natural energy, and a secondary battery for power storage are used as a power source.

  There are various electrical facilities such as lighting and ventilation fans in the tunnel, and it is necessary to supply power stably in order to operate them. The illumination in the tunnel has a special power consumption pattern that needs to be brighter in the daytime in order to reduce the difference in illuminance from natural light and is higher than the illuminance at night.

  On the other hand, power generation using natural energy such as a wind power generation device is expected to be widely used as a countermeasure against global environmental problems. However, power generation using natural energy may not be able to obtain stable power due to weather conditions or the like. In order to deal with this problem, for example, Japanese Patent Application Laid-Open No. 11-69893 (Patent Document 1) and Japanese Patent Application Laid-Open No. -72273 (Patent Document 2), Japanese Patent Application Laid-Open No. 6-133472 (Patent Document 3), etc., absorb fluctuations in the output of natural energy-based power generation by using it together with a secondary battery for power storage. Such a power supply system has been proposed.

  Furthermore, in Japanese Patent Application Laid-Open No. 2003-158825 (Patent Document 4), a combination of a natural energy generation power generation device, a secondary battery for power storage, and a commercial power source, and a peak cut position of power consumption in a load are set. There has been proposed a power supply system that supplies cheaper power while supplying stable power by supplying power from a natural energy-use power generation device or a secondary battery for power storage by controlling.

JP 11-69893 A JP-A-9-72273 JP-A-6-133472 JP 2003-158825 A

  As mentioned above, the power consumption of the lighting in the tunnel is a special power consumption pattern because the illuminance is higher in the daytime than at night, and the power consumption is higher in the daytime, and the cheap electricity bill at night There is a problem that it leads directly to an increase in cost because it is not possible to make use of the benefits of. In addition, the contract form with the power supply company has a restriction that power cannot be used beyond the peak of power consumption determined at the time of contract.

  In other words, if the contract is set with a high peak power consumption, the power charge will increase although the power consumption required by the electrical equipment in the tunnel can be covered. Conversely, if the contract is set with a low peak power consumption, Although the charge can be reduced, there is a problem that it cannot cope with the increase in power consumption in the electrical equipment in the tunnel.

  Therefore, it is necessary to pay for the shortage in preparation for the occurrence of power demand exceeding the peak of power consumption in the electrical equipment in the tunnel.

  In the said Unexamined-Japanese-Patent No. 2003-158825 (patent document 4), consideration for supplying electric power according to the characteristic of the power consumption of such an electrical equipment in a tunnel is not made | formed.

  In view of such circumstances, the present invention takes into account the power consumption characteristics of the electrical equipment in the tunnel including lighting and other electrical equipment, and is inexpensive at night from the power generated by the power generator using natural energy and the commercial power supply. It is an object of the present invention to provide a power supply system for electrical equipment in a tunnel that can reduce the amount of commercial power used in the daytime and supply cheaper and more stable power by using power together with a power storage battery.

  A first aspect of the present invention for solving the above-mentioned problem is a power supply system for electrical equipment in a tunnel for covering power used in a tunnel, the power generation means using natural energy, and the power generation means The secondary battery for power storage that charges the generated power and the power received from the commercial power source, or discharges the charged power and supplies the electrical equipment in the tunnel, and within the allowable peak power amount When adjusting the amount of power received from a commercial power source to charge the secondary battery for power storage, and the amount of power supplied by combining the amount of power generated by the power generation means is less than the amount of power consumed by the electrical equipment in the tunnel Discharges the secondary battery for power storage, and when there is a margin, charges the secondary battery for power storage with the amount of power generated by the power generation means, so that the power supplied from the commercial power source is the peak power. Lying in the power supply system of the tunnel in an electrical equipment, characterized in that a control means for so as not to exceed the amount.

  In the first aspect, the combined use of the natural energy utilization power generation device and the secondary battery for power storage consumes more than a predetermined amount of power from the commercial power source and is consumed by the electrical equipment in the tunnel. Can be satisfied.

  According to a second aspect of the present invention, in the first aspect, the control unit determines a peak cut position based on a power consumption characteristic in the electrical equipment in the tunnel and a discharge characteristic of the secondary battery for power storage. The power supply system of the electrical equipment in the tunnel is characterized in that it can be determined.

  In the second aspect, the peak cut position can be set based on the actual power consumption pattern in the electrical equipment in the tunnel and the discharge characteristics of the secondary battery for power storage.

  According to a third aspect of the present invention, in the first or second aspect, the secondary battery for power storage is used as a power source for the uninterruptible power supply when the power supplied by the commercial power source and the power generation unit is insufficient. It is in the power supply system of the electrical equipment in the tunnel characterized by functioning.

  In the third aspect, even if an unexpected situation of power shortage occurs, power can be supplied to the electrical equipment in the tunnel for a certain period.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the electric power in the tunnel is configured to sell a surplus portion of the generated power to the commercial power source side. In the power supply system.

  In the fourth aspect, by supplying the surplus to the commercial power supply side, it becomes possible to sell the power to the power company and obtain the consideration, and the cost for the final power consumption can be reduced.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the power generation means is a wind power generator, and there is an electric power supply system for electrical equipment in a tunnel.

  In the fifth aspect, wind power generation is used as a power supply source, and in combination with a secondary battery for power storage, the instability of power supply when the wind power generator is used alone is eliminated, and as a whole Stable and inexpensive power can be supplied.

  According to the power supply system for electrical equipment in a tunnel of the present invention, the peak cut position can be set based on the power generation status of the power generation device using natural energy and the discharge capacity of the secondary battery for power storage. By controlling not to receive power exceeding the peak cut position from commercial power, even if the contract is made with a reduced peak cut position and power is insufficient, the shortage can be stored in the secondary battery for power storage. Therefore, it is possible to meet the power demand required by the electrical equipment in the tunnel as a whole.

  Moreover, since the electric power stored in the secondary battery for power storage is night electric power with a low electric power charge or electric power using natural energy generation, the cost can be reduced.

  Furthermore, the problem that the natural energy generation power generation facility is unstable due to fluctuations in the amount of generated power due to weather conditions or the like can be solved by using a secondary battery for power storage. Furthermore, since it has the structure which can supply the surplus part of the generated electric energy to an electric power company, electric power sale is also possible.

  As mentioned above, according to the power supply system of the electrical equipment in a tunnel of this invention, it becomes possible to perform cheaper and stable power supply.

  Hereinafter, the best mode for carrying out the present invention will be described. The description of the present embodiment is an exemplification, and the present invention is not limited to the following description.

<Embodiment 1>
FIG. 1 is a system configuration diagram of a power supply system according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the power supply system 1 of the electrical equipment 6 in the tunnel includes at least a commercial power source 7, a power receiving / feeding device 2, a wind power generator 3, a secondary battery 4 for power storage, an electrical equipment 6 in the tunnel, It is comprised from the control apparatus 5.

  The power receiving / power feeding device 2 is connected to the commercial power source 7, receives power from the commercial power source 7 so as not to exceed a predetermined peak cut position and charges the secondary battery 4 for power storage under the control of the control device 5. To do. When there is surplus power in the power supply system 1, power is supplied to the commercial power supply 7 in order to sell power to the power company.

  The electric power generated by the wind power generator 3 is supplied to the electrical equipment 6 in the tunnel when the power consumption of the electrical equipment 6 in the tunnel exceeds the peak cut position under the control of the control device 5, and conversely peaks. When the cutting position is not reached, the secondary battery 4 for power storage is charged.

  The electric power stored in the secondary battery 4 for power storage is transferred to the electrical equipment 6 in the tunnel when the power of the wind power generator 3 cannot cover the power consumption of the electrical equipment 6 in the tunnel under the control of the control device 5. Discharged.

  The electrical equipment 6 in the tunnel refers to electrical equipment such as lighting and ventilation fans installed in the tunnel.

  The control device 5 controls whether the power generation secondary battery 4 is charged into the power storage secondary battery 4 or the electric power in the tunnel 6 is supplied with power, and the power stored in the power storage secondary battery 4 is controlled. Is an apparatus that controls the output according to the power consumed in the electrical equipment 6 in the tunnel and adjusts the amount of power received from the commercial power source 7 according to a predetermined peak cut position.

  FIG. 2 is a flowchart showing the operation of the power supply system 1 according to the first embodiment of the present invention. The control device 5 adjusts the power (S1) received by the power receiving / power feeding device 2 with the commercial power source 7 so that the preset peak cut position is set as the upper limit (S2). When setting the peak cut position, it is set in consideration of the observed values of the discharge capacity (D3) of the secondary battery 4 for power storage and the power consumption pattern (D4) of the load.

  Based on whether it is daytime or nighttime (S5), the control device 5 performs control to charge the secondary battery 4 for power storage with the received commercial power (S6). This is to make efficient use of cheap electricity at night. If it is not nighttime, the secondary battery 4 for power storage is discharged (S7).

  The control device 5 measures the generated power (S8) of the wind power generator 3 (S9) and compares it with the power consumption of the electrical equipment 6 in the tunnel (S10). As a result of the comparison, if the generated power exceeds the power consumption, it is detected whether there is a vacant charge capacity of the secondary battery 4 for power storage (S11). When there is a vacancy, control is performed so that the generated power exceeding the power consumption is charged in the power storage secondary battery 4 (S6). When the charge capacity of the secondary battery 4 for power storage is not free and the generated power exceeds the power consumption in the electrical equipment 6 in the tunnel (S12), it is possible to sell power to the power company (S13).

  In the comparison between the generated power and the consumed power in S10, the control device 5 performs control so that the power stored in the secondary battery 4 for power storage is allocated to the shortage when the generated power falls below the consumed power. At that time, if the sum of the power generated by the wind power generator 3 and the power storage secondary battery 4 is less than the power consumed by the electrical equipment 6 in the tunnel, the power is received from the commercial power source 7 to compensate for the shortage. Control is performed so that the generated power is supplied to the electrical equipment 6 in the tunnel. As a result, power is received within a range not exceeding the peak cut position.

  The power consumption of the wind power generator 3 and the secondary battery 4 for power storage is reduced (S14), the power from the commercial power supply 7 is peak cut (S15), and surplus power is supplied to the power company. Electric charges can be reduced by the consideration (S13) obtained by doing this (S16).

  Eventually, in the electrical equipment 6 in the tunnel, when the power supply system 1 of the electrical equipment 6 in the tunnel has insufficient power generated by the wind power generator 3, the output of the secondary battery 4 for power storage or the commercial power supply 7 Since the electric power from is supplied together, a stable electric power supply can be received.

  FIG.3 and FIG.4 is a figure which shows the example of an operation pattern with the peak cut of the electric power supply system which concerns on Embodiment 1 of this invention.

  Each graph in FIG. 3 and FIG. 4 shows an example of peak cut, where the vertical axis represents power and the horizontal axis represents the time of one day. 3 (a) is the power consumption in the electrical equipment 6 in the tunnel, FIG. 3 (b) is the power generated by the wind power generator 3, FIG. 4 (a) is a combination of FIG. 3 (a) and FIG. The difference between the power consumption and the generated power at each time, FIG. 4 (b) is the charged or discharged power of the secondary battery 4 for power storage, and FIG. 4 (c) is a combination of FIG. 4 (a) and FIG. 4 (b). The amount of power received from the commercial power source 7 or the amount of power sold to the commercial power source 7 at each time is shown.

  In FIG. 4 (a), the portion where the line indicated by 102 is below zero on the vertical axis and is negative covers the power consumed by the electrical equipment 6 in the tunnel with the power generated by the wind power generator 3. Indicates the state. That is, it shows a state where there is a surplus of electric power from wind power generation.

  In principle, this surplus power is charged in the power storage secondary battery 4, but when the power storage secondary battery 4 is fully charged, power is sold to the commercial power source 7. The amount of electric power sold is shown in the portion where the line indicated by 106 is negative below zero on the vertical axis. That is, surplus power of wind power generation cannot be charged because the secondary battery 4 for power storage is fully charged, indicating that the power supply system 1 as a whole has surplus power. The surplus power can be sold to the commercial power source 7 to obtain a price, thereby reducing the cost for supplying power to the electrical equipment 6 in the tunnel.

  In the portion where the line indicated by 103 exceeds the zero on the vertical axis and becomes positive, the power consumption in the electrical equipment 6 in the tunnel exceeds the power generated by the wind power generator 3, and the peak cut position is 40 kW depending on the time. It may indicate that the In other words, there is still a necessary amount of power even when using wind power. Conventionally, it is a state that causes power shortage unless power is obtained from another power supply source.

  The portion where the line indicated by 107 is more positive than zero on the vertical axis represents the amount of power received from the commercial power source 7. The amount of power received is the amount obtained by subtracting the amount of power discharged by the power storage secondary battery 4 indicated by 104 from the required amount of power indicated by 103 described above. In other words, a state where only the power generated by the wind power generation device 3 is insufficient is compensated by discharge from the secondary battery 4 for power storage, and the shortage is received from the commercial power source 7 with the peak cut position 105 as the upper limit. It is shown.

  In the present invention, the power generation means using natural energy is not limited to the wind power generator 3, and a solar power generator can also be used. Because it uses a solar power generation device, it cannot generate electricity at night, but it can be used by supplying power to the electrical equipment 6 in the tunnel or by charging the secondary battery 4 for power storage during the daytime. It is possible to function as a power supply source that supplements the demand exceeding.

  INDUSTRIAL APPLICABILITY The present invention can be used in industrial fields related to supplying power to electrical equipment in a tunnel.

1 is a system configuration diagram illustrating a power supply system according to Embodiment 1 of the present invention. It is a flowchart figure which shows the operation example of the electric power supply system which concerns on Embodiment 1 of this invention. It is a figure which shows the example of an operation pattern with the peak cut of the electric power supply system which concerns on Embodiment 1 of this invention. It is a figure which shows the example of an operation pattern with the peak cut of the electric power supply system which concerns on Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric power supply system 2 Power receiving / feeding device 3 Wind power generator 4 Secondary battery for power storage 5 Controller 6 Electrical equipment in tunnel 7 Commercial power supply 100 Power consumption pattern 101 Generated power pattern 104 Charge / discharge pattern 105 Peak cut position

Claims (5)

A power supply system for electrical equipment in a tunnel to cover power used in the tunnel,
Power generation means using natural energy;
Rechargeable power generated by the power generation means and power received from a commercial power source, or a secondary battery for power storage for discharging the charged power and feeding the electrical equipment in the tunnel;
The power storage secondary battery is charged by adjusting the amount of power received from the commercial power source within the range of the allowable peak power amount, and the supply power amount combined with the power generation amount of the power generation means is within the tunnel. When the amount of power consumed by the electrical equipment is not satisfied, the secondary battery for power storage is discharged, and when there is a margin, the amount of power generated by the power generation means is charged to the secondary battery for power storage. A power supply system for electrical equipment in a tunnel, comprising: control means for preventing power supplied from a power source from exceeding the peak power amount. In claim 1,
The control means is capable of determining a peak cut position based on a power consumption characteristic in the electrical equipment in the tunnel and a discharge characteristic of the secondary battery for power storage. Equipment power supply system. In claim 1 or 2,
The power storage system for electrical equipment in a tunnel, wherein the secondary battery for power storage functions as a power source for an uninterruptible power supply when power supplied from the commercial power source and the power generation means is insufficient. In any one of Claims 1-3,
A power supply system for electrical equipment in a tunnel, wherein a surplus portion of the generated power is sold to a commercial power source. In any one of Claims 1-4,
The power generation system of the electrical equipment in a tunnel, wherein the power generation means is a wind power generator.

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