JP2002359087A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system capable of materializing charge at the bottom of an electric power and a sufficient peak-cut operation while enhancing load leveling effect and lessening battery capacity. SOLUTION: This lighting system is provided with a commercial power supply 2, a battery power supply 5 charged by the commercial power supply 2, an inverter circuit 7 connected to the commercial power supply 2 and the battery power supply 5 through a changeover switch 4, a lamp 8 connected to the inverter circuit 7, and a control device 9 to control the changeover switch 4 so as to charge the battery power supply 5 in a time zone except a peak power demand and to light the lamp 8 with the battery power supply 5 in a time zone of peak power demand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for charging a storage power supply during off-peak hours of power demand and for lighting a lamp by the storage power supply during peak power demand times, and more particularly for improving load leveling. Lighting device.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing a configuration of a conventional lighting device disclosed in, for example, Japanese Patent No. 30112222 (Japanese Patent Laid-Open No. 11-219793), and FIG. 7 is an operation in the lighting device shown in FIG. 8 is a time chart, and FIG. 8 is a diagram showing a state of a charge / discharge control voltage level in the lighting device shown in FIG. In FIG. 6, a lighting device 100 includes a switch 101, a storage power source 102, a lighting switch 103,
The inverter circuit 104 includes an inverter circuit 104 for controlling the illumination, a lighting device 105 including, for example, a 40 W DC fluorescent lamp, the illumination of which is controlled by the inverter circuit 104, and a control device 106 for controlling the switch 101 and the inverter circuit 104.

The switch 101 has an input terminal 101a connected to the commercial power supply 111 side and three output terminals 101b, 1
01c and 101d. Output terminal 101b
Connects the commercial power supply 111 and the lighting switch 103, the output terminal 101c connects the commercial power supply 111 and the storage power supply 102, and the output terminal 101d connects the storage power supply 102 and the lighting switch 103.

The storage power supply 102 has a switch 101 on the output side.
The lighting switch 103 is connected through an output terminal d of the lighting device, and a direct current discharge voltage is output through the lighting switch 103. The storage power source 102 is, for example, a plurality of four lithium ion secondary batteries connected in series, and outputs a discharge voltage of approximately 24 V DC at the beginning of discharging.

The lighting switch 103 is provided with a switch 1 on the input side.
01 is connected to the storage terminal 102b,
The inverter circuit 104 is connected to the output side. The inverter circuit 104 has a lighting switch 103 connected to the input side and a lighting device 105 connected to the output side. The inverter circuit 104 inputs a DC voltage of approximately DC 20 V or more, and performs output control of the lighting fixture 105 according to an illuminance control signal from the control device 106.

Next, the operation will be described with reference to FIGS.
At 3:00 am, the control unit 106 issues a charge start signal T1
, The output terminal 101b of the switch 101 is switched to the output terminal 101c. At this time, the output terminal 101b of the switch 101 is connected to the commercial power supply 111 and the lighting switch 103.
And the output terminal 101c of the switch 101 is
Connecting the commercial power supply 111 and the storage power supply 102 to the storage power supply 1
02 is started.

The control unit 106 changes the output terminal 101c of the switch 101 to the output terminal 101 based on the charging end signal D1 when the charging voltage of the storage power source 102 becomes DC24V, for example.
Switch to b. At this time, the output terminal 1 of the switch 101
01c, the connection between the commercial power supply 111 and the storage power supply 102 is released to terminate charging, and the output terminal 101b of the switch 101
Connects the commercial power supply 111 and the lighting switch 103.

Next, at 8:00 am, the commercial power supply 11
When the lighting switch 103 is turned on in a state where the lighting switch 103 is connected to the lighting switch 103, the inverter circuit 104 turns on the lighting device 105 with a DC voltage obtained by rectifying commercial power supplied from the commercial power supply 111.

Next, at 1:00 pm, which is a peak time zone of commercial power demand, based on a peak start signal T2,
The output terminal 101b of the switch 101 is switched to the output terminal 101d. The output terminal 101b of the switch 101 disconnects the connection between the commercial power supply 111 and the lighting switch 103 to terminate the AC lighting in the lighting device 105. The output terminal 101d of the switch 101 is connected to the storage switch 102 and the lighting switch in the ON state. 103 is connected. As a result, the inverter circuit 104 causes the lighting device 105 to perform DC lighting with the discharge voltage supplied from the power storage power supply 102.

[0010] Next, at 4:00 pm, which is the end time of the peak time zone of the commercial power demand, and after the peak end signal T3 is inputted, the voltage level of the power storage power supply 102 drops to reach the discharge stop voltage level, and DC lighting is performed. When the end signal D2 is input, the switch 101 switches the output terminal 101d to the output terminal 101b.

The output terminal 101d of the switch 101 is connected to the power supply 102 and the lighting switch 103 to open the DC terminal.
When the lighting is finished, the commercial power supply 111 and the lighting switch 103 are connected to the output terminal 101b of the switch 101, and an AC lighting operation is started. Then, at 8:00 pm, the lighting switch 103 is turned off, and the AC lighting operation ends.

As shown in FIG. 8, the storage power supply 102 has four lithium-ion batteries connected in series. The discharge voltage at the initial stage of discharge is reduced from 24 V to a lower voltage level. In response to this, while increasing the depth of discharge by the depth of discharge setting unit of the control device 106, the discharge stop voltage level is set to, for example, the discharge stop voltage 21V (discharge depth 75
%). This discharge stop voltage is, for example, 2 of the protection level discharge voltage of the storage battery 102.
It is set slightly higher than 0 V (100% depth of discharge).
The protection level discharge voltage is 20 V because of the performance of the lithium ion battery, the self-protection circuit for forcibly stopping the discharge when the discharge voltage becomes, for example, 5 V DC which is the protection voltage of the secondary battery alone. Becomes

[0013] In this conventional lighting device, the electric power storage unit 102 is provided for charging during a time period outside the peak period of the commercial power demand and discharging during the peak time period of the commercial power demand. It is possible to suppress a sharpened commercial power demand curve during a time period. In addition, in this conventional lighting device, since the discharge stop voltage level at which the discharge is stopped by the power storage power supply 102 is adjusted, rapid deterioration of the power storage power supply 102 can be suppressed.

[0014]

However, in the above-mentioned conventional lighting device, a fixed charging / discharging time zone is provided, and a charging upper limit voltage and a discharging stop voltage are set to perform charging / discharging control. ing. Although the start time is determined for both charging and discharging, it is uncertain whether the end time is uncertain, so that it is uncertain whether it is possible to cover the bottom of power at about 6:00 in charging and about 14:00 of peak power in discharging. Therefore, the purpose of load leveling was not sufficiently satisfied.

Therefore, the present invention has been made to solve the above-mentioned problems, and it is possible to improve the load leveling effect, to reduce the battery capacity, and to achieve charging at the bottom of power and sufficient peak cut. An object of the present invention is to provide a lighting device capable of realizing driving.

[0016]

A lighting device according to the present invention includes a commercial power supply, a storage power supply charged by the commercial power supply, and a lighting circuit connected to the commercial power supply and the storage power supply via a switch. And, a lamp connected to the lighting circuit, and charging the power storage power supply during off-peak hours of power demand,
A control device for performing switching control of the switching device so that the lamp is turned on by the power storage power supply during a power demand peak time zone, wherein the control device is the earliest time of the bottom time zone of power demand. At this time, the required charging time is calculated from the battery charge amount of the power storage power supply at this time, and the charging start time is determined by calculating backward from the time when the power demand is at the bottom, and at the earliest time of the peak time zone of the power demand. When this happens, the dischargeable time is calculated from the remaining battery power of the power storage power source at this time, and the discharge start time is determined so that the time at which the power demand peaks is included in the dischargeable time.

A commercial power supply, a storage power supply charged by the commercial power supply, a lighting circuit connected to the commercial power supply and the storage power supply via a switch, and a lamp connected to the lighting circuit. A dimming device that outputs a dimming signal for adjusting the brightness of the lamp; a dimming signal control unit that controls the lighting circuit based on the dimming signal from the dimming device; A control device that controls the switching of the switching device so as to charge the storage power supply in a zone and to turn on the lamp by the storage power supply during a peak power demand time period. When the earliest time of the time zone is reached, the required charging time is calculated from the battery charge amount of the power storage power at this time, and the charging start time is determined by calculating backward from the time when the power demand becomes the bottom, and When the earliest time of the required peak time zone is reached, the dischargeable time is calculated based on the remaining battery power of the power storage power and the required power obtained from the dimming signal from the dimmer at this time. The discharge start time is determined so that the time at which the power demand peaks is included in the dischargeable time.

Further, the discharge start time is set so that the time when the power demand peaks becomes the center of the dischargeable time.

A commercial power source, a storage power source charged by the commercial power source, a lighting circuit connected to the commercial power source and the storage power source via a switch, and a lamp connected to the lighting circuit. A dimming device that outputs a dimming signal based on the brightness of the lamp; a dimming signal control unit that controls the lighting circuit based on the dimming signal from the dimming device; A control device that controls the switching of the switching device so as to charge the storage power supply in a zone and to turn on the lamp by the storage power supply during a peak power demand time period. When the earliest time of the time zone is reached, the required charging time is calculated from the battery charge amount of the power storage power at this time, and the charging start time is determined by calculating backward from the time when the power demand becomes the bottom, and When the earliest time of the required peak time zone is reached, based on the remaining battery power of the storage power supply at this time, the maximum time at which the lamp can continue to be lit during a predetermined power demand peak time zone Brightness is set and the upper limit of the brightness is set so that the lamp is turned on during the power demand peak time period.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram showing a configuration of a lighting device according to Embodiment 1 of the present invention, and FIG. 2 is an operation time chart of the lighting device shown in FIG. In FIG. 1, the lighting device 1 includes a contact 4
a switch 4 composed of a, 4b and 4c, a storage power source 5, a lighting switch 6, an inverter circuit 7 as a lighting circuit for lighting the lamp 8, a control device 9 for controlling the switch 4, and the brightness of the normal lamp 8 For example, a dimming device 10 that outputs a dimming signal for detecting and controlling the brightness of a lamp in an office,
It comprises a dimming signal control unit 12 that controls the lighting circuit based on a dimming signal from the dimming device 10.

At the earliest time of the bottom time zone of the power demand, the control device 9 determines the charging time for calculating the charging time of the storage power source 5, the reference time of the power demand bottom, and the peak time of the power demand. At the earliest time, a discharge determination time for calculating a dischargeable time, a charge / discharge-related time setting unit 9a for setting a discharge reference time at which power demand peaks, and a charge upper limit voltage setting for setting a charge upper limit voltage of the storage battery 5 Part 9
b, a discharge stop voltage setting unit 9c for setting a discharge stop voltage,
A discharge lower limit voltage setting unit 9d for setting a discharge stop lower limit voltage,
A battery voltage detector 9e for detecting the voltage of the storage power supply 5; a voltage controller 9 for comparing the voltage of the storage power supply 5 with a charge upper limit voltage, a discharge stop voltage and a discharge stop lower limit voltage and outputting a control signal
f, a switching control unit 9g that controls the switching unit 4 based on the output signal of the charge / discharge-related time setting unit 9a and the voltage control unit 9f.

Next, the operation will be described with reference to FIGS. First, the initial setting will be described. The charging determination time T2, which is the time at which the charging time is calculated, is determined based on the transition of the average daily power demand statistics shown in FIG. 2 (i) so that a sufficient charging time can be obtained. Early time 1
It was time. Also, the charging reference time T1 as the charging end target
From FIG. 2 (i), it can be seen from FIG. 2 (i) that the change near the bottom of the power demand starts at 5:00 to 6:00 and then rises sharply, so that the bottom region to be filled is from 5:00 to 6:00. And are distributed earlier. Therefore, even if the charging time is short, the "bottom"
It was set at 6:00 to set the charging time zone so as to fill the time zone. Then, the charge determination time T2 and the charge reference time T1 were set in the charge / discharge-related time setting unit 9a.

Next, the discharge determination time T5 for calculating the discharge time is set to 13:00, which is the earliest time in the power peak time zone, so that a sufficient discharge time can be obtained from FIG. 2 (i).
As for the discharge reference time T4, from FIG.
Since the power peak time zone is from 13:00 to 14:00, it was set to 14:00. Then, the discharge determination time T5 and the discharge reference time T4 were set in the charge / discharge-related time setting unit 9a.

The upper-limit charging voltage V1 of the storage power source 5 is set by the upper-limit charging voltage setting unit 9b (FIG. 2 (f)). The discharge stop voltage V2 is a voltage for stopping the discharge, and is set by the discharge stop voltage setting unit 9c. For example, the depth is set to 70% (FIG. 2G). The discharge stop lower limit voltage V3 is set to a level slightly higher than the protection voltage by the self-protection circuit of the storage battery 5 by the discharge lower limit voltage setting unit 9d (FIG. 2 (h)).
Note that the discharge stop voltage setting unit 9c sets the discharge stop voltage level to V while increasing the depth of discharge in response to the voltage level decreasing as the storage power supply 5 discharges.
Adjustment is made so as to gradually decrease from 2 to the discharge stop lower limit voltage V3.

Next, the operation is started, and when the charging determination time T2 is 1:00 am (FIG. 2A), the switching control unit 9g detects the current battery of the storage power source 5 detected by the battery voltage detecting unit 9e. The difference between the voltage V4 and the charging upper limit voltage V1 (see FIG.
The time required for charging is calculated from (f)), and the charging start time T3 is determined. For example, assuming that the battery capacity at the charging upper limit voltage V1 is 430 Wh, the battery capacity of the current battery voltage V4 is 215 Wh, and the charging capacity is 100 W, the required charging time = (430-215) ２．１100 = 2.15h,
Since the charging reference time T1 was set to 6:00, the charging start time T3 was calculated in reverse, and the charging start time T3 = 6-2.15 =
It will be 3.45 (3:27).

At 3:27 am, the switching controller 9g outputs a contact control signal C1 to the switch 4,
The contact 4a is closed (FIG. 2E). At this time, the contact 4a
Connects the commercial power supply 2 and the storage power supply 5 and starts charging the storage power supply 5.

At 6:00 am, the switching control unit 9g outputs a contact control signal C1 to the switching unit 4 when the signal of the charging reference time T1, which is the charging end signal, is applied from the charging / discharging related time setting unit 9a. Then, the contact 4a is opened (FIG. 2
(E)). At this time, the output contact 4a of the switch 4 disconnects the connection between the commercial power supply 2 and the power storage power supply 5 and ends the charging.

Next, at 8:00 am, the lighting switch 6
Is turned on and the lighting signal Son is input (FIG. 2).
(B)), the switching control device 9g outputs the contact control signal C3 to activate and close the AC lighting contact 4b (FIG. 2).
(C)). At this time, the contact 4b connects the commercial power supply 2 and the inverter circuit 7. The inverter circuit 7 turns on the lamp 8 with the commercial power supplied from the commercial power supply 2. At this time, the output d from the dimming signal control unit 12 is input to the inverter circuit 7 based on the dimming signal H1 of the dimming device 10, and the brightness of the lamp 8 is controlled by the dimming signal control unit 12. Illuminate at a brightness corresponding to the output d of.

Next, at 13:00 of the discharge determination time T5 (FIG. 2 (a)), the switching controller 9g detects the current battery voltage V of the storage battery 5 detected by the battery voltage detector 9a.
5 (FIG. 2 (f)) and the discharge stop voltage V2 set in advance to a discharge depth of 70%, the discharge lighting time is calculated, and the discharge start time T6 is set to include the discharge reference time T4.
To determine. For example, the battery capacity at the current battery voltage V5 is 387 Wh, the battery capacity at the discharge stop voltage V2 is 129 Wh, and 100% of the inverter of the negative lighting load.
Assuming that the power at the time of lighting is 97 W, the dischargeable lighting time = (387-129) ÷ 97 = 2.6.
6h (2 hours 40 minutes) Discharge start time T6 = 14-2.66 = 11.34 (11
However, since 11:20 has already passed, and even if the vehicle is operated immediately, it is possible to cover 14:00 of the discharge reference time T4, so that the operation shifts to the immediate discharge operation. In this case, the discharge start time T6
And the discharge determination time T5 are the same time.

At this time, the switching control unit 9g outputs the contact control signal C3 to the switch 4, opens the contact 4b, outputs the contact control signal C2 to the switch 4, and connects the DC lighting contact 4c. Close (FIG. 2 (d)).

Then, the contact 4b releases the connection between the commercial power supply 2 and the inverter circuit 7, and terminates the AC lighting operation. The contact 4c connects the storage power supply 5 to the inverter circuit 7, and connects the storage power supply 5 to the inverter circuit 7. The discharging operation is started. Thereby, the inverter circuit 7 lights the lamp 8 by the discharge voltage supplied from the power storage power supply 5. Then 2 hours 4
After the discharge operation for 0 minutes (15:40), when the battery voltage detection unit 9e detects the discharge stop voltage V2, the voltage control unit 9f outputs the contact control signal G1. When the contact control signal G1 is input, the switching control device 9g outputs the contact control signal C2, opens the DC lighting contact 4c (FIG. 2D), terminates the DC lighting, and sets the contact. The control signal C3 is output to close the AC lighting contact 4b (FIG. 2 (c)).

At this time, the contact 4c opens the connection between the storage power source 5 and the inverter circuit 7, and terminates the discharging operation of the storage power source 5, and the contact 4b connects the commercial power source 2 and the inverter circuit 7, The AC lighting operation is started.

Next, at 8:00 pm, the lighting switch 6
Is turned off, and a turn-off signal Soff is input (FIG. 2).
(B)), the switching control unit 9g inputs the contact control signal C3 and opens the AC lighting contact 4b (FIG. 2).
(C)). At this time, the contact 4b releases the connection between the commercial power supply 2 and the inverter circuit 7, and terminates the AC lighting operation.

As described above, charging is performed at the bottom of the power load and discharging is performed at the peak irrespective of the remaining battery level, so that the load leveling effect can be enhanced.

Embodiment 2 In the first embodiment, the dischargeable time is calculated from the remaining amount of the battery of the power storage power source, and the discharge start time is determined so that the discharge reference time at which the power demand peaks is included in the dischargeable time. The discharge possible time is calculated in consideration of the required power obtained based on the light control signal from the light control device. Since the configuration and charging are the same as those in the first embodiment, the description will be omitted, and the operation at the time of discharging will be described. FIG. 3 is an operation time chart of the lighting device according to the second embodiment.

After the lamp 8 is turned on by the AC, the discharge determination time T5
At 13:00 (FIG. 3A), the switching control unit 9g calculates the current battery voltage V5 of the storage battery 5 (FIG. 3F) and the discharge stop voltage V2 detected by the battery voltage detection unit 9a. The remaining battery level is obtained, and the discharge lighting time is calculated based on the remaining battery level and the required power obtained from the dimming signal H1 from the dimmer 10, and the discharge start time is set to include the discharge reference time T4. Determine T6. Thus, the lighting load capacity is determined from the input power at that time. For example,
The power when the inverter 7 of the lighting load is turned on 100% is 97
In the example of the change of the dimming signal in one day shown in FIG. 3 (j), it is assumed that daylight is used by the dimmer 10, and the illumination output is reduced by the amount of daylight incident during the day. About 50
% Power, the illumination power is 97W × 0.5 = 4
8.5W.

The battery capacity of the storage battery 5 is assumed to be 1/3 that of the battery of the first embodiment, the battery capacity at the upper limit charging voltage V1 is 140 Wh, and the battery capacity at the current battery voltage V5 is used. Assuming that the capacity is 126 Wh and the battery capacity at the discharge stop voltage V2 is 42 Wh, the dischargeable lighting time = (126−42) ÷ 48.5 = 1.
7h (1 hour 42 minutes) Discharge start time T6 = 14-1.7 = 12.3h (12:18), but since 12:18 has already passed, immediately
Since the operation can cover 14 o'clock of the discharge reference time T4, the operation shifts to the immediate discharge operation. In this case, the discharge start time T6 and the discharge determination time T5 are the same time.

The switching control section 9g outputs the contact control signal C3 to the switch 4, opens the contact 4b, outputs the contact control signal C2 to the switch 4, and closes the DC lighting contact 4c. (FIG. 3 (d)).

At this time, the contact 4b releases the connection between the commercial power supply 2 and the inverter circuit 7 to terminate the AC lighting operation, and the contact 4c connects the storage power supply 5 to the inverter circuit 7 and connects the storage power supply 5 Is started. Thereby, the inverter circuit 7 lights the lamp 8 by the discharge voltage supplied from the power storage power supply 5. Then one hour 4
After the discharge operation for 2 minutes (14:42), the discharge stop voltage V
2, the power demand peak end time at 4:00 pm is reached, and the switching control device 9g outputs the contact control signal C2
To open the contact 4c for DC lighting (FIG. 3).
Along with (d)), a contact control signal C3 is output to close the AC lighting contact 4b (FIG. 3 (c)).

At this time, the contact 4c opens the connection between the power storage power supply 5 and the inverter circuit 7, and terminates the discharging operation of the power storage power supply 5, and the contact 4b connects the commercial power supply 2 and the inverter circuit 7, The AC lighting operation is started.

As described above, the dischargeable time is calculated based on the remaining amount of the battery of the power storage power source 5 and the required power obtained by the light control signal from the light control device 10, and the time when the power demand peaks is determined. Since the discharge start time is determined so as to be included in the possible time, a sufficient peak cut operation can be performed while reducing the battery capacity.

Third Embodiment In the second embodiment, the dischargeable time is calculated based on the remaining amount of the battery of the power storage power source and the required power obtained from the dimming signal from the dimmer, and the power demand peaks. Although the discharge start time is determined so that the time is included in the dischargeable time, in the present embodiment, the discharge start time is set such that the discharge reference time is at the center of the dischargeable time. Since the configuration and charging are the same as those in Embodiment 1, the description is omitted,
The operation at the time of discharging will be described. FIG. 4 is an operation time chart of the lighting device according to the third embodiment.

After the lamp 8 is turned on by the AC, the discharge determination time T5
At 13:00 (FIG. 4 (a)), the switching controller 9g calculates the current battery voltage V5 (FIG. 4 (f)) of the storage battery 5 detected by the battery voltage detector 9a and the discharge stop voltage V2. The remaining battery level is calculated, and the discharge lighting time is calculated based on the remaining battery level and the required power obtained from the dimming signal H1 from the light control device 10, and the discharge reference time T4 becomes the center of the dischargeable time. Thus, the discharge start time T6 is determined.
Thus, the lighting load capacity is determined from the input power at that time. For example, 100 of the inverter 7 of the lighting load
%, The power at the time of lighting is 97 W, and in the example of the change of the dimming signal of the day shown in FIG. 4 (j), the use of daylight by the dimmer 10 is assumed. Since the lighting output is reduced and the power is set to about 50%, the lighting power is 97W × 0.5 = 48.5W.

The battery capacity of the storage battery 5 is assumed to be 1/3 that of the battery of the first embodiment. The battery capacity at the upper limit charging voltage V1 is 140 Wh, and the battery capacity at the current battery voltage V5 is used. Assuming that the capacity is 126 Wh and the battery capacity at the discharge stop voltage V2 is 42 Wh, the dischargeable lighting time = (126−42) ÷ 48.5 = 1.
7h (1 hour 42 minutes) Discharge start time T6 = 14− (1.7 / 2) = 13.5
(13: 9).

At 13:09, the switching control section 9g outputs a contact control signal C3 to the switch 4 and
b is opened and the contact control signal C2 is
And closes the DC lighting contact 4c (FIG. 4).
(D)).

At this time, the contact 4b releases the connection between the commercial power supply 2 and the inverter circuit 7 and terminates the Ac lighting operation, and the contact 4c connects the power storage power supply 5 and the inverter circuit 7 and connects the power storage power supply 5 Is started. Thereby, the inverter circuit 7 lights the lamp 8 by the discharge voltage supplied from the power storage power supply 5. Then one hour 4
After the discharge operation for 2 minutes (14:51), the discharge stop voltage V
2, the switching control device 9g outputs the contact control signal C2 to open the DC lighting contact 4c (FIG. 3D), and outputs the contact control signal C3 to output the AC lighting. Is closed (FIG. 3C).

At this time, the contact 4c opens the connection between the power storage power supply 5 and the inverter circuit 7, and terminates the discharging operation of the power storage power supply 5, and the contact 4b connects the commercial power supply 2 and the inverter circuit 7, The AC lighting operation is started.

As described above, since the discharge start time is set so that the peak of the power demand (discharge reference time) is at the center of the dischargeable time, the discharge is performed at the power load peak regardless of the remaining battery power. Therefore, the load leveling effect can be further enhanced.

Embodiment 4 In the second embodiment, the dischargeable time is calculated based on the remaining amount of the battery of the storage power supply and the required power obtained by the light control signal from the light control device, and the time at which the power demand peaks is included in the dischargeable time. The discharge start time is determined so that the maximum brightness at which the lamp can continue to be lit during the peak power demand time period is set based on the remaining battery power. The lamp is lit on the belt. Since the configuration and charging are the same as those in the first embodiment, the description will be omitted, and the operation at the time of discharging will be described. FIG. 5 is an operation time chart of the lighting device according to the fourth embodiment.

After the lamp 8 is turned on by the AC, the discharge determination time T5
At 13:00 (FIG. 5A), first, the switching control unit 9
In g, the discharge lighting time is calculated from the current battery voltage V5 (FIG. 5 (f)) of the power storage power supply 5 detected by the battery voltage detection unit 9a and the discharge stop voltage V2. During this time, when the lamp 8 cannot be turned on until the discharge end time T7 in the power demand peak time zone, the maximum brightness that can be continued to be turned on during the power demand peak time zone is set. (J) and discharge operation is performed.

For example, the battery capacity at the current battery voltage V5 is 387 Wh, the battery capacity at the discharge stop voltage V2 is 129 Wh, and 100% of the inverter of the negative lighting load.
Assuming that the power at the time of lighting is 97 W, the dischargeable lighting time = (387-129) ÷ 97 = 2.6.
6 hours (2 hours and 40 minutes). As described above, in the case of 100% lighting, even if the discharge operation is performed immediately, the lighting of the lamp 8 by the discharge can be performed until 3:40 pm. However, at 16:00 of the discharge end time T7 set as the end of the power peak time zone. It turns out that lighting cannot be performed until 3 hours.

Therefore, in order to cover three hours until the discharge end time T7, the upper limit of the lighting power is calculated. The upper limit of the lighting power = (387-129) ÷ 3 = 86W. 5 (j)) Immediately, discharge operation is started. In this case, the discharge start time T6 and the discharge determination time T5
Is the same time. At this time, the switching control unit 9g outputs the contact control signal C3 to the switch 4, opens the contact 4b, outputs the contact control signal C2 to the switch 4, and
The lighting contact 4c is closed (FIG. 5D).

The contact 4b releases the connection between the commercial power supply 2 and the inverter circuit 7 and terminates the Ac lighting operation. The contact 4c connects the storage power supply 5 to the inverter circuit 7 and connects the storage power supply 5 to the inverter circuit 7. The discharging operation is started. Thereby, the inverter circuit 7 lights the lamp 8 by the discharge voltage supplied from the power storage power supply 5. Next, after reaching the discharge stop voltage V2 after the discharge operation for 3 hours,
Alternatively, upon reaching the discharge end time T7, the switching control device 9g outputs the contact control signal C2 to open the DC lighting contact 4c (FIG. 5D), and outputs the contact control signal C3. Then, the contact 4b for AC lighting is closed (FIG. 5C).

At this time, the contact 4c opens the connection between the storage power source 5 and the inverter circuit 7, and terminates the discharging operation of the storage power source 5, and the contact 4b connects the commercial power source 2 and the inverter circuit 7, The AC lighting operation is started.

As described above, the maximum brightness at which the lamp can continue to be lit during the peak power demand period is set, and the lamp is lit during the peak power demand period. Sufficient peak cut operation can be performed with a small amount.

[0056]

As described above, according to the present invention, a commercial power supply, a storage power supply charged by the commercial power supply, and a lighting circuit connected to the commercial power supply and the storage power supply via a switch are provided. And controlling the switching of the switching device so that the lamp connected to the lighting circuit and the storage power supply are charged during a time period outside the peak power demand period, and the lamp is lit by the storage power supply during the peak power demand time period. When the earliest time of the bottom time zone of the power demand is reached, the control device calculates the required charging time from the battery charge amount of the power storage power at this time, and the power demand is the bottom. The charging start time is determined by calculating backward from the current time, and when the earliest time of the peak time zone of the power demand is reached, the dischargeable time is calculated from the remaining battery power of the power storage power at this time, and the power demand is calculated. Since the time that the peak is determined the firing time to be included in the dischargeable time, it is possible to increase the load leveling effect.

Also, a commercial power supply, a storage power supply charged by the commercial power supply, a lighting circuit connected to the commercial power supply and the storage power supply via a switch, a lamp connected to the lighting circuit, A dimming device that outputs a dimming signal for adjusting the brightness of the lamp; a dimming signal control unit that controls the lighting circuit based on the dimming signal from the dimming device; A control device that controls the switching of the switching device so as to charge the storage power supply in a zone and to turn on the lamp by the storage power supply during a peak power demand time period. When the earliest time of the time zone is reached, the required charging time is calculated from the battery charge amount of the power storage power at this time, and the charging start time is determined by calculating backward from the time when the power demand becomes the bottom, and When the earliest time of the required peak time zone is reached, the dischargeable time is calculated based on the remaining battery power of the power storage power and the required power obtained from the dimming signal from the dimmer at this time. Since the discharge start time is determined so that the time at which the power demand peaks is included in the dischargeable time, a sufficient peak cut operation can be performed while reducing the battery capacity.

Further, since the discharge start time is set so that the time when the power demand peaks becomes the center of the dischargeable time, the load leveling effect can be further enhanced.

A commercial power supply, a storage power supply charged by the commercial power supply, a lighting circuit connected to the commercial power supply and the storage power supply via a switch, and a lamp connected to the lighting circuit. A dimming device that outputs a dimming signal for adjusting the brightness of the lamp; a dimming signal control unit that controls the lighting circuit based on the dimming signal from the dimming device; A control device that controls the switching of the switching device so as to charge the storage power supply in a zone and to turn on the lamp by the storage power supply during a peak power demand time period. When the earliest time of the time zone is reached, the required charging time is calculated from the battery charge amount of the power storage power at this time, and the charging start time is determined by calculating backward from the time when the power demand becomes the bottom, and When the earliest time of the required peak time zone is reached, based on the remaining battery power of the storage power supply at this time, the maximum time at which the lamp can continue to be lit during a predetermined power demand peak time zone Since the brightness is set and the brightness is set as the upper limit of the brightness, the lamp is turned on during the power demand peak time zone. Therefore, a sufficient peak cut operation can be performed while reducing the battery capacity.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a lighting device having an emergency light function according to a first embodiment of the present invention.

FIG. 2 is an operation time chart of the illuminating device having an emergency light function according to the first embodiment of the present invention.

FIG. 3 is an operation time chart of the illumination device having an emergency light function according to the second embodiment of the present invention.

FIG. 4 is an operation time chart of a lighting device having an emergency light function according to a third embodiment of the present invention.

FIG. 5 is an operation time chart of a lighting device having an emergency light function according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a conventional lighting device.

FIG. 7 is an operation time chart of a conventional lighting device.

FIG. 8 is a diagram showing a discharge voltage level in a conventional lighting device.

[Explanation of symbols]

1 lighting device, 2 commercial power supply, 4 switcher, 5 storage power supply, 6 lighting switch, 8 lamp, 7 inverter circuit, 9 controller, 10 dimmer, 12 dimmer signal controller.

Continued on the front page (71) Applicant 000213297 Chubu Electric Power Co., Inc. 1 Higashi-ku, Higashi-ku, Nagoya-shi, Aichi (71) Applicant 000242644 Hokuriku Electric Power Co., Inc. 15-1, Ushijima-cho, Toyama-shi, Toyama (71) Applicant 000156938 Kansai Electric Power Co., Ltd. 3-2-2, Nakanoshima, Kita-ku, Osaka-shi, Osaka (71) Applicant 000211307 Chugoku Electric Power Co., Inc. 4-33, Komachi, Naka-ku, Hiroshima-shi, Hiroshima (71) Applicant 000180368 Shikoku Electric Power Co., Inc. Takamatsu, Kagawa Ichi Marunouchi 2-5 (71) Applicant 591085835 Okinawa Electric Power Co., Inc. 5-2-1 Makiko, Urasoe-shi, Okinawa (72) Inventor Kazuo Ban 2--14-40 Ofuna, Kamakura-shi, Kanagawa Prefecture Mitsubishi Electric Lighting Stock Inside the company (72) Inventor Sakae Takagi 7-2-1, Nakayama, Aoba-ku, Sendai, Miyagi Prefecture Inside the R & D Center of Tohoku Electric Power Co., Inc. (72) Inventor Kazuhiro Sasaki Kita-Seki, Otaka-cho, Midori-ku, Nagoya-shi 20-1 Chubu Electric Power Co., Inc. Electricity Research Institute (72) Inventor Sakai Katsu 15-15 Ushijimacho, Toyama City, Toyama Prefecture (72) Inventor Tadashi Masuda 3-3-22 Nakanoshima, Kita-ku, Osaka City Kansai Electric Power Co., Inc. (72) Inventor Tsuneo Takagi Hiroshima Prefecture 4-33 Komachi, Naka-ku, Hiroshima-shi Chugoku Electric Power Co., Inc. Chome No.2-1 Okinawa Electric Power Company F-term (reference) 3K073 AA16 AA41 AA83 BA13 CG22 CL00 CL10 5G003 AA01 BA01 CA11 CB07 DA07 GB06 5G066 CA07 CA08 HB09 JA03 JB03 KA01 KA12

Claims (4)

[Claims] 1. A commercial power supply, a storage power supply charged by the commercial power supply, a lighting circuit connected to the commercial power supply and the storage power supply via a switch, a lamp connected to the lighting circuit, A control device for charging the storage power supply in a time zone outside the peak power demand and performing switching control of the switch so as to turn on the lamp by the storage power supply in the peak power demand time zone, the control device comprising: When the earliest time of the bottom time zone of the power demand is reached, the required charging time is calculated from the battery charge amount of the power storage power at this time, and the charging start time is determined by calculating backward from the time when the power demand becomes the bottom. When the earliest time of the peak time zone of the power demand is reached, the dischargeable time is calculated from the remaining battery power of the power storage power at this time, and the time at which the power demand peaks is the discharge enabled time. Lighting apparatus characterized by determining the firing time to be included in the time. 2. A commercial power supply, a storage power supply charged by the commercial power supply, a lighting circuit connected to the commercial power supply and the storage power supply via a switch, a lamp connected to the lighting circuit, A dimming device that outputs a dimming signal for adjusting the brightness of the lamp; a dimming signal control unit that controls the lighting circuit based on the dimming signal from the dimming device; And a control device that controls the switching of the switch so that the lamp is turned on by the power storage power supply during a peak power demand time period, the control device comprising: When the earliest time of the time zone is reached, the required charging time is calculated from the battery charge amount of the power storage power at this time, the charging start time is determined by calculating backward from the time when the power demand becomes the bottom, and the power demand is determined. When the earliest time of the required peak time zone is reached, the dischargeable time is calculated based on the remaining battery power of the power storage power and the required power obtained from the dimming signal from the dimmer at this time. A lighting start time is determined such that a time at which a power demand peaks is included in the dischargeable time. 3. The lighting device according to claim 1, wherein the discharge start time is set such that the time when the power demand peaks is at the center of the dischargeable time. 4. A commercial power source, a storage power source charged by the commercial power source, a lighting circuit connected to the commercial power source and the storage power source via a switch, a lamp connected to the lighting circuit, A light control device that outputs a light control signal based on the brightness of the lamp; a light control signal control unit that controls the lighting circuit based on the light control signal from the light control device; And a control device that controls the switching of the switch so that the lamp is turned on by the power storage power supply during a peak power demand time period, the control device comprising: When the earliest time of the time zone is reached, the required charging time is calculated from the battery charge amount of the power storage power at this time, and the charging start time is determined by calculating backward from the time when the power demand becomes the bottom, and When the earliest time of the required peak time zone is reached, based on the remaining battery power of the storage power supply at this time, the maximum time at which the lamp can continue to be lit during a predetermined power demand peak time zone The lighting device according to any one of claims 1 to 3, wherein brightness is set, and the brightness is set as an upper limit, and the lamp is turned on during the power demand peak time zone.