JPH0515085A - Checking method for life of battery of uninterruptible power source of bidirectional catv system - Google Patents

Abstract

PURPOSE:To provide a method for simply checking a life of a battery contained in an uninterruptible power source supplying device in a center. CONSTITUTION:In an uninterruptible power source supplying device for supplying power to a repeating amplifier for a CATV provided in a CATV transmission line, supply of a commercial power source is forcibly interrupted by a command from a center 1, an uninterruptible power source supplying device 3 is operated at the time of power interruption to supply power from the battery in the device 3 to the amplifier through an inverter and to monitor a battery voltage in the center. When the battery voltage becomes a reference value or less, an elimination command is output from the center to eliminate the power interruption state, a time until the battery voltage becomes a reference voltage value Vo or lower is measured in the center 1 to check the life of the battery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for checking the life of a battery in an uninterruptible power supply which supplies a commercial power supply to a relay amplifier of a CATV transmission line during normal operation and a battery voltage during a power failure.

[0002]

2. Description of the Related Art Uninterruptible power supply units 3 for supplying power to relay amplifiers 2 are scattered on a CATV transmission line. This uninterruptible power supply 3 has a built-in battery 5 for supplying power only during a power failure in order to compensate for power supply during a power failure, so that the voltage of the battery 5 can be DC / AC converted by an inverter 6 to supply power for a certain period of time. I am doing it. A large number of relay amplifiers 2 are provided on the CATV transmission line, and a large number of uninterruptible power supply devices 3 are also provided correspondingly. Therefore, the daily maintenance work of the battery built in the power supply 3 is extremely difficult. In order to simplify this maintenance work, a battery for free maintenance has been conventionally used in the uninterruptible power supply 3. However, in that case, the life of the battery 5 is relatively short, and the variations in the life are large. Therefore, when a power failure occurs, the battery may deteriorate and the power failure compensation function may not be fully fulfilled. To solve this problem, it is enough to be able to reliably check the battery life, but currently there is no effective means for that. Therefore, in the past, the reality is to go to a place where an uninterruptible power supply is installed, actually operate the inverter to supply power to the load, and measure the compensation time. It was the check method of.

[0003]

In the conventional battery check method, it is a great work to judge the deterioration and the life of the batteries of all the uninterruptible power supply units 3 actually installed, which is a great task. There was a problem that it required time and labor.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for easily checking the life of a battery built in an uninterruptible power supply in a center of a CATV system.

[0005]

Bidirectional CATV of the present invention.
The battery life check method in the uninterruptible power supply of the system is provided in the CATV transmission line, and commercial power is supplied during normal operation, and battery voltage is supplied through the inverter during power failure.
In the uninterruptible power supply for supplying to the ATV relay amplifier, the uninterruptible power supply 3 forcibly sets the commercial power supply to a power failure state by a command from the center 1 of the CATV system and supplies power to the relay amplifier 2 at the time of the power failure. Is operated to supply power from the battery 5 in the power supply 3 to the load via the inverter, and the battery voltage is monitored. When the battery voltage falls below the reference value, the center issues a cancel command to confirm the power failure state. The battery life is checked by releasing the battery and measuring the time until the battery voltage falls below the reference value at the center.

[0006]

To check the battery life by the battery life checking method in the uninterruptible power supply of the present invention, the CA
As shown in FIG. 1, each uninterruptible power supply 3 in the TV transmission line is provided with a data transmission device 7 capable of performing remote monitoring control with the center 1 by a polling selecting method. Then, the central supervisory control device 4 installed in the center 1 issues a command of forcible power failure (disconnecting commercial power) to the data transmission device 7 in each uninterruptible power supply 3, and the relay is activated by the command signal. Operate and disconnect commercial power. As a result, the battery 5 built in the uninterruptible power supply 3
Power is converted into DC-AC by the inverter and supplied to the relay amplifier provided in the CATV transmission path. At this time, the output voltage of the battery 5 is measured by the measuring circuit provided in each uninterruptible power supply 3, the analog output voltage of the measuring circuit is converted into a digital signal, and the data (battery voltage information) is converted into the data. The data is sent from the transmission device 7 to the center 1 via the bidirectional transmission line 9 of the CATV system, and stored in the central supervisory control device 4 in the center 1. The central supervisory control device 4 monitors the transmitted data and, when the voltage of the battery 5 drops below a preset reference value, issues a cancellation command to the uninterruptible power supply 3 to supply commercial power. To return. At the same time, the time from the start of power supply from the battery 5 until the battery voltage drops below the reference voltage value is measured, the capacity of the battery 5 is measured from that time, and the life of the battery 5 is measured by the center 1. Judgment in. FIG. 3 shows a curve of discharge characteristics from the start of power supply from the battery 5 until the battery voltage drops below the reference voltage value Vo. 3A is a discharge characteristic curve of a normal battery, and B is a discharge characteristic curve of a deteriorated battery. Vo is a preset reference value of the output voltage of the battery, Ta is the time until the battery of A reaches Vo, and Tb is the time until the battery of B reaches Vo. By measuring the time T from when the battery starts the power failure compensation output to when it reaches Vo, it is possible to know the deterioration state of the battery and determine the life.

[0007]

FIG. 2 shows an embodiment of a method for checking the battery life of an uninterruptible power supply according to the present invention. In FIG.
When the AC100V commercial power is applied when all of 1, SW2 and SW3 are ON, the relay RY1 is actuated, the contact ry1-1 falls to the side a, and the relay RY1-1 is connected to the secondary side of the transformer T1.
C30V or 60V is output. During this time, the charging circuit 1
The battery 5 is charged through 0. When a power failure occurs naturally in this state, the relay RY1 does not operate, its contact point ry1-1 is switched to the b side, and ry1-2 is switched to the b side,
The output of the battery 5 is applied to the inverter circuit 6 to be converted from direct current to alternating current (DC-AC conversion), and 30 V AC or 60 V AC is used as a compensation power supply during a power failure via the transformer T2.
It is supplied to the relay amplifier of the TV system. This power failure is detected at the contacts ry1-3 of the relay RY1 and the fact that the power failure has occurred is transmitted to the center 1.

In order to check the battery voltage in the uninterruptible power supply 3 in the circuit of FIG. 2, the host computer of the center 1 is provided with the number of the uninterruptible power supply 3 to cause a power failure to 11 (FIG. 1), The forced power failure command is input, and the information is input to the uninterruptible power supply 3 of the number specified by the central monitoring and control unit 4.
The data is transmitted to the data transmission device 7 inside and the relay RY2 is operated. When the relay RY2 operates, its contact ry2-1 is switched to the contact a side, and the relay RY1 is turned off to bring about a power failure state. As a result, the voltage of the battery 5 is changed to the inverter 6
DC-AC conversion is performed at
It is supplied to the relay amplifier of the V system. Battery 5 at this time
Is connected to the analog input section of the data transmission device 7, is converted into a digital signal by the A / D conversion circuit in the data transmission device 7, is modulated into a high frequency signal through the RF modem, and is transmitted to both CATV. It is sent to and stored in the host computer 11 of the central supervisory control device 4 in the center 1 via the transmission line. The battery voltage is monitored and measured at regular time intervals, and is sent to the center 1 each time and is stored in the host computer 11 of the central monitoring and control device 4.

The host computer 11 in the central supervisory control unit 4 in the center 1 cancels the forced power failure when the output voltage of the battery 5 drops below a preset reference value Vo (FIG. 3). To send the command to the uninterruptible power supply 3 of the previously designated number to cancel the forced power failure and restore the commercial power. At the same time, the host computer 11 measures the time from the time of the forced power failure to the cancellation of the power failure, displays the value on the CRT 12, and also displays the judgment as to whether or not it has reached the end of life. If necessary, the printer 13 also outputs the data. In addition, graph the change in battery voltage from the time of forced power failure to cancellation of power failure,
The discharge characteristics of are output to the CRT and the printer.

When the data transmission device 7 is not provided with an A / D conversion circuit, the reference voltage value Vo or less is set between the data transmission device 7 and the battery 5 as shown by the alternate long and short dash line in FIG. Judgment circuit 8 with built-in comparator circuit so that output is output when
Is provided, the information is sent to the center 1 only when the reference voltage value Vo is reached, thereby issuing a command for canceling the forced power failure from the center 1 and the time from the forced power failure until the commercial power is restored to the center 1. The host computer 11 may measure and output to the CRT 12 and the printer 13.

[0011]

According to the method of checking the battery life of the uninterruptible power supply of the present invention, the life of the built-in battery of the uninterruptible power supply actually installed can be controlled and monitored by the center. Therefore, the labor and labor of the work can be saved, which leads to the cost reduction.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a battery life check method in an uninterruptible power supply according to the present invention.

FIG. 2 is a circuit diagram showing an internal configuration of the uninterruptible power supply in FIG.

FIG. 3 is an explanatory diagram showing discharge characteristics of a battery.

[Explanation of symbols]

 1 center 2 relay amplifier 3 uninterruptible power supply 5 battery

Claims (1)

Claim: What is claimed is: 1. A CATV system center in a uninterruptible power supply device which is provided in a CATV transmission line and supplies a commercial power supply during normal operation and a battery voltage through an inverter to a CATV relay amplifier during a power failure. In response to a command from 1, the commercial power supply is forcibly put into a power failure state, and the uninterruptible power supply 3 that supplies power to the relay amplifier 2 is activated at the time of the power failure to operate the battery 5 in the power supply 3 via the inverter. The power is supplied to the load and the battery voltage is monitored. When the battery voltage falls below the reference value, the center 1 issues a release command to release the power outage and the time until the battery voltage falls below the reference value A method for checking battery life in an uninterruptible power supply of a two-way CATV system, which is characterized by measuring the battery life by measuring with.