JP5378885B2 - CATV transmission line power supply monitoring system, method, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To continuously monitor the states of distributed power supply devices from the head-end sides, and to accurately predict and notify the battery compensation time of each power supply device when a trouble such as a power failure occurs. <P>SOLUTION: The power supply device 36 supplies a conversion AC power from a commercial AC power source 38 to a CATV transmission line 24 in normal operation, and supplies power from a battery at power failure of the commercial AC power source 38, and converts a DC power into an AC power for power supply to the CATV transmission line. When a status monitoring section 42 detects that power is supplied to the power supply device 36 from the battery, a static prediction portion 46 predicts a static prediction time until the voltage is decreased to a predetermined shut-off voltage for stopping the battery power supply based on a battery voltage at a predicted start point after switching. A dynamic prediction section 48 predicts a dynamic prediction time until the battery voltage is decreased to the shut-off voltage based on battery voltage change under battery power supply. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a power supply monitoring system, method, and program for a CATV transmission line that remotely monitors the state of a power supply device that supplies AC power to an active device such as an amplifier arranged in the CATV transmission line, from the head end side. The present invention relates to a power supply monitoring system, method, program, and recording medium for a CATV transmission line that predicts and distributes a compensation time until shutoff when switching to battery power supply due to a power failure of a commercial AC power supply.

  Conventionally, in order to operate an active element such as an optical element, a high frequency amplifying element, and a control element mounted in a device constituting a CATV transmission line, the conductivity of a coaxial cable is used to transmit a high frequency signal from a power supply device. Power is supplied to each active element by superimposing power on a certain coaxial cable.

  Since the power supply device is connected between the head end of the CATV transmission line and the node by a non-conductive optical fiber, the CATV transmission line after the node is grouped, and the power supply devices are distributed in groups.

  The power supply unit distributed on the CATV transmission line converts the AC voltage of commercial AC power (100VAC in Japan, 115VAC in the United States) into 30VAC to 90VAC, which is lower than the commercial power supply considering the safety of construction work, using an AC-AC converter. The power is supplied to the coaxial cable.

  In addition, a battery is provided in the power supply unit in order to cope with a power failure of the commercial AC power source. When a power failure occurs in the commercial AC power source, it is switched to power supply from the battery, and the DC power from the battery is converted to AC power by a DC-AC inverter. The high-reliability CATV transmission line is constructed by supplying power to the coaxial cable.

In particular, in recent years, the provision of high-reliability services using the CATV transmission line, starting with the primary telephone service, is becoming full-fledged. As in “Compensation”, a highly reliable network equivalent to that of a conventional communication carrier can be realized by a CATV transmission line.

JP 2000-152484 A

  In a conventional CATV transmission line in which power supply devices having a battery mechanism are dispersedly arranged, when a power failure occurs, a battery provided in each power supply device is determined based on the current load in the target area, the configuration of the power supply device, and the capacity of the battery. Ascertaining the compensation time until shut-off, and determining the priority of correspondence in ascending order of compensation time, various response measures such as rushing to the place where the power supply is installed and temporarily supplying compensation from the generator are required. become.

  For example, in the case of a CATV transmission line with 300,000 subscribers, approximately 2800 power supply units are distributed and arranged by grouping. On the other hand, about 100 generators are prepared to cope with power failure. For this reason, when a power failure occurs, the power supply that has been switched to battery power supply is identified, the battery compensation time for each power supply is ascertained, the priority is determined in order of the shortest compensation time until shut-off, and the power supply installation location Therefore, it is necessary to take measures to temporarily supply compensation power from the generator.

  However, the battery compensation time of a conventional power supply device uses a compensation time that is uniquely calculated from the battery capacity given as a rating and the grouped load power. Therefore, it is difficult to grasp the actual compensation time of each power supply unit, and it is difficult to establish an efficient and rational countermeasure in the event of a power failure. The battery may shut off before service is stopped.

The present invention continuously monitors the state of distributed power supply devices from the head end side, and monitors the power supply of a CATV transmission line that accurately predicts and notifies the battery compensation time of each power supply device when a failure such as a power failure occurs. It is an object to provide a system, a method, a program, and a recording medium.

(system)
The present invention is a power supply monitoring system for a CATV transmission line,
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power supply from the battery is switched to convert the DC power to AC power and supplied to the CATV transmission line. Equipment,
A state monitoring unit that detects and monitors the state of the power supply device including the battery voltage from the head end side at predetermined intervals;
In a normal time, a remote test processing unit that detects a prediction start point from a predetermined change in the battery voltage when the power supply device is switched to power supply from the battery and measures the prediction start voltage,
When the status monitoring unit detects a switch to battery power supply due to a power failure of the commercial AC power supply of the power supply device, it detects the arrival of the predicted start point from a predetermined change in the battery voltage after the switch is detected, and performs remote test processing A static prediction unit for predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on a prediction start voltage measured by the unit, and
Each time the battery voltage is detected by the state monitoring unit after a predetermined time has elapsed from the prediction start point, until the battery voltage drops to the shut-off voltage based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween A dynamic prediction unit for predicting the dynamic compensation time of
A failure information distribution unit that generates and distributes failure information including the compensation time predicted by the static prediction unit and the dynamic prediction unit;
It is provided with.

  The state monitoring unit, the static prediction unit, the dynamic prediction unit, and the failure information distribution unit are provided in a server machine arranged on the head end side.

  The remote test processing unit detects the prediction start point by switching to battery power supply on condition that the battery is in a fully charged state.

  The remote test processing unit and the static prediction unit reach a minimum point where the battery voltage after switching to battery power supply stops decreasing after decreasing from the voltage at the time of switching, and then continuously decrease after recovering from this minimum point. A measurement point immediately before starting is detected as a prediction start point.

  Furthermore, when the state monitoring unit detects the switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, the static prediction unit considers the battery voltage at the time of switching as the prediction start voltage and supplies the battery power. The static compensation time until the voltage drops to a predetermined shut-off voltage to stop is roughly estimated.

  The static prediction unit is based on the prediction start voltage measured in advance, the AC output voltage and AC output current measured at the prediction start point by the state monitoring unit, and a predetermined constant of the predetermined power supply device, The power generation capacity and load power of the power supply device are calculated, and the static compensation time is calculated by dividing the power generation capacity by the load power.

  The dynamic prediction unit calculates a dynamic compensation time until the battery voltage decreases to the shut-off voltage based on the multi-order polynomial.

  Each time the dynamic voltage is measured by the state monitoring unit, the dynamic prediction unit 3 based on the measurement battery voltage at the measurement start point, the current measurement battery voltage, and the measurement battery voltage at the midpoint between the prediction start point and the current point. The constant of each term of the second-order polynomial is obtained, the current measured battery voltage is substituted for the variable of each term, and the dynamic compensation time until the battery voltage drops to the shut-off voltage is calculated.

  When the state monitoring unit detects the switching of the power supply from the AC power supply to the battery, the fault information distribution unit switches from the AC power supply to the battery power supply and the approximate static value calculated by the static prediction unit. Fault information including compensation time (roughly remaining time until shut-off) is generated and distributed.

  The failure information distribution unit generates failure information including the static compensation time (remaining time until shut-off) calculated by the static prediction unit when the static prediction unit detects arrival at the prediction start point. And deliver.

  The failure information distribution unit generates and distributes failure information including the calculated dynamic compensation time every time the dynamic prediction unit calculates the dynamic compensation time (remaining time until shut-off).

The failure information distribution department
When the state monitoring unit detects battery shut-off, it generates and distributes fault information including the shut-off time and a serious failure occurrence message,
After that, when recovery of the AC power supply is detected by the state monitoring unit, fault information including a recovery time and a recovery message is generated and distributed.

(Method)
The present invention relates to a power feeding monitoring method for a CATV transmission line,
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power supply from the battery is switched to convert the DC power to AC power and supplied to the CATV transmission line. A state monitoring step of detecting and monitoring the state including the battery voltage of the device at predetermined intervals from the head end side;
Remote test processing step of measuring the predicted start voltage by switching the power supply device to power supply from the battery and detecting the predicted start point from a predetermined change in the battery voltage at normal times,
When the switch to battery power supply due to a power failure of the commercial AC power supply of the power supply device is detected in the status monitoring step, the arrival of the prediction start point is detected from the predetermined change in the battery voltage after the switch is detected, and remote test processing A static prediction step for predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the predicted start voltage measured in the step;
After a predetermined time has elapsed from the prediction start point, each time the battery voltage is detected by the state monitoring step, until the battery voltage drops to the shutoff voltage based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween A dynamic prediction step for predicting a dynamic compensation time of
A failure information distribution step for generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
It is provided with.

(program)
The present invention is a power supply monitoring program for a CATV transmission path,
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power supply from the battery is switched to convert the DC power to AC power and supplied to the CATV transmission line. A state monitoring step of detecting and monitoring the state including the battery voltage of the device at predetermined intervals from the head end side;
Remote test processing step of measuring the predicted start voltage by switching the power supply device to power supply from the battery and detecting the predicted start point from a predetermined change in the battery voltage at normal times,
When the switch to battery power supply due to a power failure of the commercial AC power supply of the power supply device is detected in the status monitoring step, the arrival of the prediction start point is detected from the predetermined change in the battery voltage after the switch is detected, and remote test processing A static prediction step for predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the predicted start voltage measured in the step;
After a predetermined time has elapsed from the prediction start point, each time the battery voltage is detected by the state monitoring step, until the battery voltage drops to the shutoff voltage based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween A dynamic prediction step for predicting a dynamic compensation time of
A failure information distribution step for generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
Is executed.

(recoding media)
The present invention is a computer-readable recording medium that stores a power supply monitoring program for a CATV transmission line.
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power supply from the battery is switched to convert the DC power to AC power and supplied to the CATV transmission line. A state monitoring step of detecting and monitoring the state including the battery voltage of the device at predetermined intervals from the head end side;
Remote test processing step of measuring the predicted start voltage by switching the power supply device to power supply from the battery and detecting the predicted start point from a predetermined change in the battery voltage at normal times,
When the switch to battery power supply due to a power failure of the commercial AC power supply of the power supply device is detected in the status monitoring step, the arrival of the prediction start point is detected from the predetermined change in the battery voltage after the switch is detected, and remote test processing A static prediction step for predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the predicted start voltage measured in the step;
After a predetermined time has elapsed from the prediction start point, each time the battery voltage is detected by the state monitoring step, until the battery voltage drops to the shutoff voltage based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween A dynamic prediction step for predicting a dynamic compensation time of
A failure information distribution step for generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
The power supply monitoring program for the CATV transmission path for executing the above is stored.

  According to the present invention, in the event of a power failure, from the constant determined by the battery voltage at the prediction start point that starts to decrease continuously after switching to battery power supply and the configuration of the power supply device, the battery specific to each power supply device is shut off. By calculating and distributing the static compensation time, the more accurate compensation time is calculated according to the battery configuration, load, and other conditions. It is possible to appropriately and quickly take measures to rush to the place and temporarily supply compensation power from the generator.

In addition, during compensation feeding after switching to the battery, the battery voltage is measured at predetermined intervals, and the dynamic compensation time until shut-off is calculated and monitored based on the change in the battery voltage. A more accurate compensation time can be calculated by dynamically calculating the compensation time based on changes in actual load power and battery voltage that cannot be obtained by calculating the compensation time. It is possible to quickly perform compensation power supply by a generator by rushing to the place where the power supply device is installed before shutting down.

The block diagram which showed the electric power feeding monitoring system of the CATV transmission line by this invention Explanatory drawing which showed embodiment of the power supply apparatus provided in the server provided in the head end side of FIG. 1, and a CATV transmission line Time chart showing the change in battery voltage when the power supply device is switched by battery power supply using the output current as a parameter FIG. 2 is a time chart showing detection of a prediction start point and dynamic prediction processing for a change in battery voltage by the monitoring server of FIG. The block diagram which showed the hardware constitutions of the computer which implement | achieves the server of FIG. Time chart showing status monitoring processing by the monitoring server of FIG. The flowchart which showed the monitoring process with prediction of the battery compensation time by the monitoring server of FIG. The flowchart which showed the detail of the remote test process in step S12 of FIG. Time chart showing failure message delivery processing by the management server of FIG.

  FIG. 1 is a block diagram showing a power feeding monitoring system for a CATV transmission line according to the present invention, showing a head end side and a part of the transmission line side following this.

  In FIG. 1, a monitoring server 10, a management server 12, a client 14, and a modem communication unit 18 are connected to the head end 20 side via a network 16 such as a LAN. An optical fiber 21 is drawn from the head end 20 and connected to the optical node 22. A coaxial cable 25-1 is drawn from the optical node 22, and the coaxial cable 25-1 is branched hierarchically toward the subscriber terminal side, and, for example, amplifiers 28, 30, 32, and 34 are arranged as active elements. . An amplifier 26 is connected to the coaxial cable 25-2 drawn from the optical node 22, and is branched hierarchically into another cable system.

  The CATV transmission lines 24 are grouped for each predetermined power supply unit. For example, in FIG. 1, the power supply group G1 is configured by the optical node 22 and the amplifier 26, the power supply device 36-1 is connected to the optical node 22, and AC power from the commercial AC power supply 38-1 is supplied to the predetermined AC. It is converted into AC power to be a voltage and supplied to the optical node 22 and the amplifier 26 of the group G1.

  The amplifiers 28, 30, 32, and 34 constitute another power supply group G2. For the power supply group G2, the power supply device 36-2 is connected to the power supply inserter 40 inserted in the coaxial cable between the amplifiers 28 and 30, and the AC power from the commercial AC power supply 38-2 is converted into a predetermined AC voltage. Thus, power is supplied to the active elements included in the power feeding group G2.

  Specific groupings of the power feeding groups G1 and G2 are as follows. Regarding the power supply group G1, since the optical fiber 21 is provided between the head end 20 and the optical node 22, the power supply from the power supply device 36-1 is not transmitted during this period. On the other hand, power is supplied from the power supply device 36-1 to the amplifier 26 using the coaxial cable 25-1 connected to the branch terminal of the optical node 22 as a conductor. In order for the amplifier 26 to cut power supply to the downstream side, a circuit for bypassing the AC power supply may not be provided between the upstream input / output terminal and the downstream input / output terminal of the amplifier 26. By not providing this AC bypass circuit in the amplifier 26, the power supply from the power supply device 36-1 to the downstream side of the amplifier 26 can be cut off.

  For the power feeding group G2, a power supply bypass circuit for bypassing the power supply is provided between the upstream input / output terminal and the downstream input / output terminal for the amplifier 36. However, the amplifier 28 located at the upstream and downstream boundaries of the group G2. , 32, and 34 are not provided with a power supply bypass circuit, so that the power supply to the upstream side and the downstream side of the group G2 is cut off.

  The monitoring server 10 provided on the head end 20 side remotely monitors the state of the power supply devices 36-1 and 36-2 provided on the CATV transmission line 24 side, and commercial AC power supplies 38-1 and 38-2. When it is detected that the power supply devices 36-1 and 36-2 are switched to battery power supply due to a power failure, the compensation server calculates the compensation time until the battery voltage drops to a predetermined shutoff voltage and the battery power supply stops. 12, and the status of compensation time until the power supply devices 36-1 and 36-2 are shut off is notified from the management server 12 by e-mail or the like.

  The modem communication unit 18 provided on the upper side of the head end 20 performs IP communication with the modem communication unit incorporated in the power supply devices 36-1 and 36-2 and will be clarified in the following description. The monitoring server 10 can monitor the state of the power supply devices 36-1 and 36-2 and measure the voltage and current. SNMP (Simple Network Management Protocol) is used as the IP communication by the modem communication unit 18.

  FIG. 2 is an explanatory diagram showing an embodiment of a server provided on the head end side of FIG. 1 and a power supply device provided on a CATV transmission line.

  In FIG. 2, first, the power supply device 36 provided on the CATV transmission line 24 side includes an AC-AC converter 58, a changeover switch 60, an AC-DC inverter 62, batteries 64-1 to 64-3, a DC-AC inverter 66, A modem communication unit 68, a state measurement unit 70, and a controller 72 are provided.

  When the commercial AC power supply 38 is normal, the AC-AC converter 58 converts AC power from the commercial AC power supply 38 into an AC power supply having a predetermined AC voltage, and supplies power corresponding to the CATV transmission line 24 via the changeover switch 60. Power is supplied to the group. The commercial AC power supply 38 is, for example, 100 AC in Japan and 115 VAC in the United States. The output voltage converted by the AC-AC converter 58 is commercial for safety reasons in construction work on the CATV transmission line 24. 30 VAC to 90 VAC, which is lower than the power supply voltage, is used, and 60 VAC is most popular at present.

  The AC-AC converter 58 includes a circuit for reshaping and stabilizing a waveform, an overcurrent prevention circuit, a hypertrophy circuit, and the like in addition to the function of converting an AC voltage.

  The AC-DC inverter 62 periodically charges the batteries 64-1 to 64-3. That is, when the controller 72 determines that the battery voltage of the batteries 64-1 to 64-3 is equal to or lower than a predetermined reference voltage, the AC-DC inverter 62 is activated to convert the AC power supply of the commercial AC power supply 38 into DC power. Then, the batteries 64-1 to 64-3 are charged to restore the battery voltage so that a predetermined battery voltage can be maintained at all times.

  The DC-AC inverter 66 is activated when the controller 72 detects that the AC-AC converter 58 has stopped due to a power failure of the commercial power supply 38, converts the battery power of the batteries 64-1 to 64-3 into AC power, At this time, compensation power from the batteries 64-1 to 64-3 is supplied to the CATV transmission path 24 via the changeover switch 60 that is switched to the DC-AC inverter 66 side.

  If the discharge amount of the batteries 64-1 to 64-3 exceeds the limit in the state where the DC-AC inverter 66 is switched to the battery power supply operating, the battery is seriously damaged and cannot be recharged. In order to protect the batteries 64-1 to 64-3 from damage caused by such overdischarge, the controller 72 monitors the battery voltage and shuts down the DC-AC inverter 66 when the battery voltage drops to a predetermined voltage. It is turned off and battery power supply is stopped.

  The voltage at which the battery power supply is stopped is called a shut-off voltage, and the time from when the DC-AC inverter 66 is activated until the shunt is turned off is called a battery compensation time or simply a compensation time.

  A state measurement unit 70 provided in the power supply device 36 detects a state change due to switching from the AC-AC converter 58 to the DC-AC inverter 66 due to a power failure of the commercial AC power supply 38, and by IP communication of the modem communication unit 68, The state notification is performed to the monitoring server 10 on the head end side. When the modem communication unit 68 receives a state value measurement request from the monitoring server 10, the state measurement unit 70 outputs the battery voltage output from the batteries 64-1 to 64-3 and the CATV via the changeover switch 60. Each of the AC output voltage and the AC output current supplied to the transmission line 24 is measured and transmitted as a state measurement value in response to the monitoring server 10.

  Further, the controller 70 stops the AC-AC converter 58 and starts the DC-AC converter 66 according to an external remote test command received by the modem communication unit 68, and uses the battery power of the batteries 64-1 to 64-3. It is possible to switch to the battery power supply supplied from the batteries 64-1 to 64-3 to the CATV transmission line 24 via the changeover switch 60 which is converted into AC power and switched to the DC-AC inverter 66 side.

  On the other hand, the management server 44 provided on the head end side includes a state monitoring unit 42 and a battery compensation time prediction unit 44 as functions realized by execution of a program by a computer. The battery compensation time prediction unit 44 includes a remote test unit 45, a static prediction unit 46, and a dynamic prediction unit 48.

  The management server 12 provided above the monitoring server 10 is provided with a main database 50, a log database 52, an information management unit 54, and a mail processing unit 56. In the present embodiment, the server machine is provided separately for the monitoring server 10 and the management server 12, but each function may be provided in one server machine.

  Here, prediction of the battery compensation time in the present embodiment will be described. FIG. 3 is a time chart of measurement results showing the time variation of the battery voltage when the power supply device 36 is switched to battery power feeding, using the output current as a parameter.

  Assume that the AC power supply by the AC-AC converter 57 is switched to the battery power supply by the DC-DC converter 66 at the measurement characteristic time t0 in FIG. The voltage at the switching point 82 to the battery power supply reaches a minimum point 84 that stops decreasing after the battery power supply is stopped, and thereafter, after the voltage recovers, the voltage starts to decrease continuously and immediately before the continuous decrease starts. These measurement points are used as the prediction start point 86. Thereafter, when the voltage decreases and reaches a shut-off voltage of a discharge end point (EOD: End of Battery Discharge) 88, the DC-DC converter 66 is shut off.

  Here, the characteristics 76, 78, 80, and 82 are measurement results when the negative overcurrent is reduced with respect to the characteristic 74, but for any of the characteristics, the switching point 82 for starting battery power feeding, the minimum point 84, The measurement points 86 are substantially coincident with each other, and the change in the decrease rate corresponding to the load current occurs after the measurement point 86.

  FIG. 4 shows static prediction and dynamic prediction of the battery compensation time according to the present embodiment for the measurement characteristic 74 of FIG.

  In the prediction of the battery compensation time according to the present embodiment, the battery voltage decreases from the switching point 82 and recovers after reaching the minimum point 84, and then the measurement point immediately before starting to decrease continuously is the prediction start point. It is defined as

  When the prediction start point 86 is detected from the change in the battery voltage, the static prediction unit 46 of the monitoring server 44 in FIG. 2 performs static prediction of the battery compensation time Tp. When the state monitoring unit 42 detects that the power supply device 36 has switched to battery power supply due to a power failure of the commercial AC power supply, the static prediction unit 46 changes from the change in the battery voltage after the switching detection to the prediction start point 88. The static compensation time Tp, which is the remaining time until the discharge end point 88 where the battery power supply is stopped, is reduced based on the predicted start voltage measured in advance by the remote test unit 45 is detected. To do.

  That is, the state monitoring unit 42 provided in the monitoring server 10 performs polling for collecting state information at high speed according to SNMP from a plurality of power supply devices arranged in the CATV transmission path 24, and the power supply device 36 illustrated in FIG. When a power failure occurs in the commercial AC power supply 38 and the switching from the AC-AC converter 58 to the battery power supply by the DC-AC inverter 66 is recognized, the battery compensation time prediction unit 44 is activated to execute the battery compensation time prediction process. .

  Prior to this, the remote test unit 45 provided in the battery compensation time prediction unit 44 performs a remote test when the commercial AC power supply 38 is normally obtained, for example, once a day when a predetermined set time is reached. A command is transmitted, the power supply device 36 is switched to the power supply from the batteries 64-1 to 64-3, and a remote test process is performed to detect the prediction start point from a predetermined change in the battery voltage and measure the prediction start voltage. ing.

  The detection of the measurement start point by the remote test unit 45 is the same as the detection of the measurement start point by the static prediction unit 46, and as shown in FIG. 4, the minimum point 84 that stops decreasing after decreasing from the voltage at the switching point 82. The measurement point immediately before starting the continuous decrease after recovering from the minimum point 84 is detected as the prediction start point 86.

  In addition, the execution of the remote test by the remote test unit 45 is conditional on the battery being in a fully charged state. When the remote test is executed when the battery is not fully charged, the battery voltage is detected at a low level, and the predicted start point cannot be accurately detected. Whether or not the battery is fully charged is determined by checking the discharge history due to a power failure of the AC commercial power supply, for example, for 20 hours before the remote test is performed. Determine and cancel the remote test.

The static prediction unit 46 has a prediction start voltage Es measured in advance by the remote test unit 45, an AC output voltage E _AC and an AC output current I _AC measured at the prediction start point 86 by the state monitoring unit 42, and a predetermined value. Based on the predetermined constant of the power supply device 36, the power generation capacity Q and the load power P of the power supply device 36 are calculated, and the static compensation time Tp is calculated by dividing the power generation capacity Q by the load power P.

That is, the static battery compensation time Tp based on the predicted start voltage Es that is the battery voltage at the predicted start point is given by the following equation.
Tp = 60Q / P (min) (1)
However,
Q: Power generation capacity (Wh) of the power supply from the start of inverter operation to shut-off
P: Total load (W)

Further, the power generation capacity Q of the equation (1) is given by the following equation.
Q = {0.5 (Es + En) / Ea} · m · n · Qb (2)
However,
m: Number of strings per power supply (book)
n: Number of batteries per string
Es: Battery voltage at the start of prediction (V)
Ep: Battery voltage (V) during shut-off operation
Qb: Battery power generation capacity Note that the number of strings refers to the number of series connected systems of batteries.

  The power generation capacity given by equation (2) varies depending on the environmental temperature. The environmental temperature of the battery is approximately 0 to 50 ° C., and based on the power generation capacity of 25 ° C., the power generation capacity increases at higher temperatures, and the power generation capacity decreases at lower temperatures. The fluctuation of the power generation capacity at the environmental temperature of 0 to 50 ° C. is about 10%, and the rate of change of the power generation capacity with respect to the temperature change is obtained in advance.

  In the present embodiment, the environmental temperature is measured and stored by polling the power supply device 36 by the state monitoring unit 42.

The total load Q in the equation (1) is a load of the power supply device 36 including the power consumption of the inverter and the modem communication unit, and is given by the following equation.
P = E _AC · ΣI _AC (pf / ef) + Ph + Pi (3)
However,
E _AC : AC output voltage (V)
I _AC : AC output current (A)
pf: power factor ef: inverter efficiency Ph: power consumption of modem communication unit (W)
Pi: Power consumption of inverter (W)

Further, the battery power generation capacity Qb of the equation (2) is given by the following equation.
Qb = Qc + β · Ia ^γ (4)
Qc: Battery power generation capacity (rated value) (Wh)
β: correction coefficient for battery power generation capacity change due to current γ: correction coefficient for battery characteristics

  In the equations (1) to (4), except for the battery voltage Es at the start of battery power supply, the constants are fixedly determined by the configuration of the power supply device 36 and the batteries 46-1 to 46-3 used. By preparing these constants for each power supply device in advance and storing them in the main database 50, the battery voltage Es at the start of the inverter operation can be measured to calculate the static battery compensation time Tp.

Here, constants other than the battery voltage Es, the AC output voltage E _AC , and the AC output current I _AC as measured values used in the equations (1) to (4) are supplied to the main database 50 of the management server 12. Each of the devices 36 is stored in advance, and the setting of the constant for each power supply device 36 in the main database 50 is performed at the time of system construction using the client 14.

  If the static prediction unit 46 cannot detect a change in the battery voltage that reaches the prediction start point 86 through the local minimum point 84 shown in FIG. If the upward trend is not observed even after the first polling, the static compensation time is calculated by regarding that point as the prediction start point. If no change from the minimum point 84 to the prediction start point 86 is observed even after the predetermined observation period has elapsed, the static compensation time is set by regarding the time after the observation period as the prediction start point. calculate. This process is the same for the remote test.

  Furthermore, the static prediction unit 46 of the present embodiment detects the battery voltage at the switching point 82 when the state monitoring unit 45 detects the switching point 82 for switching to battery power supply due to a power failure of the commercial AC power supply in the power supply device 36. Considering Ei as the predicted start voltage Es at the measurement start point 86, the power generation capacity Q of the equation (2) is obtained, and the static compensation until the voltage is reduced to a predetermined shut-off voltage for stopping the battery power supply from the equation (1). The time Tp is roughly predicted.

  There is a time lag of about 30 minutes at the maximum from when the commercial AC power supply is switched to battery power supply due to a power failure, until the on-site troubleshooting service is started and the predicted start point is detected. Therefore, in the meantime, prioritization of the power supply apparatus that has failed and planning and notification such as work order allocation to the work personnel based on this are performed. At this time, the static prediction unit 46 predicts the approximate static compensation time Tp, so that the basis for prioritizing the failed power supply apparatus is given, and the failure response plan can be more smoothly planned. Is possible.

When the static prediction unit 46 calculates and outputs the static compensation time Tp at the measurement start point 86, after storing the static compensation time Tp in the memory, the polling cycle is assumed to be ΔT for each polling by the state monitoring unit 42. The static compensation time Tp is updated by the following equation.
Dp = Dp−ΔT (5)
As a result, the static compensation time Tp decreases sequentially with time.

The dynamic prediction unit 48 obtains and monitors a calculation waiting time Tc from the static compensation time Tp to the start of calculation of the dynamic compensation time. The calculation waiting time Tc is, for example, 30% of the static compensation time, that is, Tc = 0.3 Tp
Set as The ratio of the static compensation time that determines the calculation waiting time Tc can be arbitrarily determined.

  When the arrival of the calculation start point 90 at the time t2 when the calculation waiting time Tc has elapsed from the prediction start point 86 at the time t1 is detected for the characteristic 74 in FIG. 4, the dynamic compensation unit 48 predicts the dynamic compensation time Tp. Is called. The dynamic prediction unit 48 calculates a dynamic compensation time Tp until the battery voltage Es decreases to the shut-off voltage Ep based on a multi-order polynomial.

When the characteristic curve from the measurement start point 82 to the discharge end point 88 is approximated by a parabola, the approximate expression is
y = a ₁ x ^m + a ₂ x ^m−1 +... + a _m x + a _{m + 1}
Is given by a multi-degree polynomial.

In the characteristic 74 of FIG. 4, the voltage drops rapidly in the vicinity of the discharge end point 88, and it is difficult to reproduce this drop by approximation with a quadratic function. On the other hand, the complexity is high enough to apply a function of the fourth or higher order. Since it is not seen, in the present embodiment, it is desirable to use an approximate expression of the following cubic function.
y = a ₁ x ³ + a ₂ x ² + a ₃ x + a ₄
Since y = Tp and x = Es, the approximate expression is Tp = a ₁ Es ³ + a ₂ Es ² + a ₃ Es + a ₄ (6)
It becomes.

  The prediction calculation at the calculation start point 90 is performed based on the three voltages of the measurement start voltage Es1 at the measurement start point 86, the voltage Es3 at the calculation start point, and the voltage Es2 at Tc / 2 that is half the calculation waiting time Tc. The compensation time Tp is calculated by obtaining the constants a1, a2, a3, a4 in the equation (6) by multiplication.

  Here, although the measurement start voltage Es1 at the measurement start point 86 is fixed, the voltage Es3 at the calculation start point and the voltage Es2 at the intermediate point change every time the polling is performed, so that the dynamic prediction unit 48 calculates the calculation start point 90. Thereafter, every time the battery voltage Es of the power supply device 36 is measured by polling of the state monitoring unit 42, the constants a1, a2, a3, a4 of the equation (6) are obtained from the three points of voltage by the least square method and measured. The compensation time Tp is calculated by substituting the voltage Es.

  Next, failure distribution processing by the management server 12 will be described. The mail processing unit 56 of the management server 12 functions as a failure information distribution unit, and generates and distributes failure information including the battery compensation time Tp predicted by the static prediction unit 46 and the dynamic prediction unit 48 of the monitoring server 10. .

This distribution process is as follows.
(1) When the state monitoring unit 42 detects power supply switching from the AC power supply of the power supply device 36 to the battery, the switching to the battery power supply and the approximate static compensation time calculated by the static prediction unit 46 ( Fault information including the approximate remaining time until shut-off) is generated and mailed.
(2) When arrival at the prediction start point is detected, fault information including the static compensation time (remaining time until shut-off) calculated by the static prediction unit 46 is generated and delivered by mail.
(3) Each time the dynamic prediction unit 48 calculates the dynamic compensation time (remaining time until shut-off), fault information including the calculated dynamic compensation time is generated and delivered by mail.
(4) When a battery shut-off is detected by the state monitoring unit 42, fault information including a shut-off time and a serious fault occurrence message is generated and mailed.
(5) When the state monitoring unit 42 detects the recovery of the commercial AC power supply, it generates failure information including a recovery time and a recovery message and distributes the mail.

  Of course, in addition to mail delivery, failure information may be transmitted and displayed on the client 14 at each timing.

  FIG. 5 is a block diagram showing a hardware environment of a computer used for the monitoring server 10 and the management server 12 of FIG.

  In the computer of FIG. 5, a RAM 104, a ROM 106, a hard disk drive 108, a keyboard 112, a mouse 114, a device interface 110 for connecting a display 116, and a network adapter 118 are connected to the bus 102 of the CPU 100.

  The hard disk drive 108 is loaded with a state monitoring program and a battery compensation time prediction program according to this embodiment from a CD-ROM or the like which is a computer-readable recording medium. When the computer is started, the ROM 106 is booted up by BIOS. The OS is read and arranged in the RAM 104, and then the state monitoring program and the battery compensation time prediction program of this embodiment are read from the hard disk drive 108 from the hard disk drive 108 by the execution of the OS, arranged in the RAM 52, and executed by the CPU 100. The The hardware configuration is the same for the management server 12 and the client 14.

  In addition, since input / output between the monitoring server 10 and the management server 12 and the user is performed by the client 14, the computer operating as the monitoring server 10 and the management server 12 includes a keyboard 112, a mouse 114, a display 116, and a device interface. 110 may not be provided.

  The present invention also provides a recording medium storing a program executed on a server machine realized by a computer as shown in FIG. Here, the recording medium is a portable storage medium such as a CD-ROM, floppy disk (R), DVD disk, magneto-optical disk, IC card, or a hard disk drive (HDD) provided inside or outside the computer system. In addition to the apparatus, it includes a database that holds a program via a line, or another computer system and its database.

  FIG. 6 is a flowchart showing the state monitoring process of the power supply device 36 by the state monitoring unit 42 provided in the monitoring server 10 of FIG. In FIG. 6, in the state monitoring process, first, address A is initialized, for example, A = 1, for the addresses set in advance in the plurality of power supply devices 36 provided in the CATV transmission line network 24 in step S1. Thereafter, the state of the battery voltage, the AC output voltage, the AC output current, the temperature, the status, etc. is acquired by polling the power supply device at address A = 1 in step S2.

  The various state information acquired in step S2 is stored in the log database 52 of the management server 12 in step S3, and at the same time, necessary information such as status is output to the battery compensation time prediction unit 44.

  Subsequently, in step S4, it is determined whether or not it is the final address. If it is not the final address, the address is incremented by 1 in step S5, and the process of acquiring the state by polling the next address is repeated in step S2. When the final address is determined in step S4, the process returns to step S1 to initialize the address, and then polling from step S2 is repeated.

  In this embodiment, the polling cycle for acquiring the status information by the status monitoring process is acquired in a cycle of about 1 minute for one power supply device 36 and stored in the log database 52, for example. Has been.

  FIG. 7 is a flowchart showing a monitoring process involving a prediction process by the battery compensation time prediction unit 44 of the monitoring server 10 of FIG. In FIG. 7, the monitoring server 10 determines whether or not it is a remote test timing predetermined in step S <b> 11.

  The timing of the remote test is determined by reaching a predetermined time once a day for a plurality of power supply devices that are monitored by the monitoring server 10. When the timing of the remote test is determined in step S11, the process proceeds to step S12 and the remote test is executed.

  FIG. 8 is a flowchart showing details of the remote test in step S12 of FIG. In FIG. 8, the remote test checks in step S31 whether or not the power supply device to be tested is in a fully charged state. Whether or not the battery is fully charged is determined based on whether or not inverter switching due to a power failure of the commercial AC power supply has occurred within the past, for example, 20 hours. If the battery is not fully charged, the remote test is not performed.

  If the battery power supply by switching the inverter has not been performed within the past 20 hours, it is determined that the battery is in a fully charged state, and the process proceeds to step S30. Based on the remote command received by the modem communication unit 68 by the controller 72, the DC The operation is switched to the operation of the AC converter 66, and the changeover switch 60 is switched to the DC-AC converter 66 side to start power feeding from the batteries 64-1 to 64-3.

  In this state of switching to battery power supply, the battery voltage is acquired for each polling period by polling by the state monitoring process shown in FIG. 6, and in step S33, the battery power supply as shown in FIG. The battery voltage drops from the switching point 82, and then the detection of the minimum point 84 when it stops and recovers is monitored. When the minimum point 84 is detected, the process proceeds to step S34, and the battery voltage passes the minimum point 84. After the recovery, recovery of the prediction start point 86 immediately before starting to decrease continuously is determined.

  When the detection of the prediction start point is determined in step S34, it is stored as the prediction start voltage Es in step S35, and the process for calculating the static compensation time when switching to battery power supply due to a power failure of the actual commercial AC power supply The prediction start voltage Es acquired in the test is used.

  Referring to FIG. 7 again, if the remote test is completed in step S12, it is determined in step S13 whether or not there is switching to the DC-AC inverter 66, that is, whether or not switching to battery power supply due to a power failure of the commercial AC power supply is determined. ing.

  When the switching of the DC-AC converter 66 is determined, the process proceeds to step S14, where the static prediction unit 46 roughly calculates and outputs the battery compensation time Tp. The rough calculation of the battery compensation time Tp is performed by regarding the battery voltage Ei acquired at the battery power supply switching point 82 shown in FIG. 4 as the predicted start voltage Es at the predicted start point 86, and the above formulas (1) to (4). To calculate and output the approximate compensation time Tp until battery shut-off.

  By outputting this rough battery compensation time Tp, the priority of the power supply apparatus that has caused the failure can be determined based on the rough battery compensation time Tp immediately after the start of battery power supply due to a power failure of the commercial AC power supply. Therefore, it is possible to smoothly notify the plan notification of the barcode that determines the assignment of the work order based on this.

  Subsequently, in step S15, it is determined whether or not a prediction start point is detected. Whether or not the prediction start point is detected is the same as the detection of the prediction start point in the remote test shown in FIG. 8. First, the detection of the minimum point immediately after switching is determined, and then the battery voltage is recovered. If there is a change that starts to decrease continuously after that, the immediately preceding point is detected as the prediction start point.

  When the detection of the prediction start point is determined in step S15, the process proceeds to step S16, and the static battery compensation time Tp is calculated from the equations (1) to (4) and output. In calculating the static battery compensation time Tp, the temperature of the power generation capacity Q is corrected based on the temperature data for 24 hours acquired in the state monitoring process of FIG. 6 to obtain a more accurate static battery compensation time Tp. I am trying to calculate.

  Subsequently, in step S17, the presence or absence of polling is checked. If polling is determined, the process proceeds to step S18, and the compensation time Tp calculated in step S16 is updated by equation (5) and output. That is, the time obtained by subtracting the polling period ΔT from the current compensation time Tp is updated and output as a new compensation time Tp.

  Subsequently, at step S19, it is determined whether or not the calculation waiting time Tc set as, for example, 30% of the static battery compensation time Tp calculated at step S16 has elapsed, and until the calculation waiting time Tc has been determined. The updating of the polling response compensation time in steps S17 and S18 is repeated.

  When it is determined in step S19 that the calculation waiting time Tc has elapsed, the process proceeds to step S20, where the dynamic prediction unit 48 calculates and outputs the battery compensation time Tp. As shown in FIG. 4, the calculation of the dynamic battery compensation time Tp is performed by detecting the prediction start voltage at the prediction start point 86 and the calculation start point 90 when the calculation waiting time Tc that becomes the calculation start point 90 has elapsed. By calculating the constants a1 to a4 from the equation (6) by the least square method based on the voltage and the voltage at the intermediate point 92 between them, and substituting the detection voltage Es at the calculation start point 90 into this. Then, the battery compensation time Tp until the discharge end point 88 at which shutoff is performed is calculated and output.

  Subsequently, in step S21, it is determined whether or not polling is performed. If polling is determined, it is determined whether or not shutdown is acquired as status information in step S22. If not shut down, the process returns to step S20. The process of calculating and outputting the compensation time Tp is repeated.

  When the shutdown is determined in step S22, the process proceeds to step S23, where it is determined whether or not the AC line is restored. When the AC line is restored, the process returns to step S11, and the remote test processing in the normal state is performed. Will repeat.

  FIG. 9 is a flowchart showing failure message distribution processing by the management server 12 of FIG. In FIG. 9, in the failure message output process, it is determined whether or not the DC-AC inverter is switched in step S41. When switching to the DC-AC inverter 66 is determined due to a power failure of the commercial AC power supply, the process proceeds to step S42. Go ahead and create an e-mail containing the approximate battery compensation time calculated at the time of AC line power failure and battery power switching, and the person in charge of the management department managing the CATV transmission line, or the generator when a failure occurs An e-mail is transmitted to a personal computer or a portable terminal owned by an operator who performs the work of installing the device.

  As an e-mail to be sent in step S42, for example, “At 14:00, the AC line of the power supply-ABC goes down and the inverter is switched. Shutdown is about 4 hours after the battery is fully charged. Yes, a more accurate prediction is made "is sent.

  The person in charge who received the mail delivery with the contents of the approximate battery compensation time sent at the start of battery power supply will prioritize the power supply device that has caused the failure and work based on it It is possible to smoothly proceed with notification of creation of a rank allocation plan.

  Subsequently, in step S43, it is determined whether or not the prediction start point is detected after the battery power supply is started. If it is determined that the prediction start point is detected, the process proceeds to step S44, and the shutoff calculated by the detection of the prediction start point is determined. Create an email containing the estimated static battery time and deliver it to the terminal device of the person in charge. As the mail delivered in this step S44, for example, a mail with the content that “the power supply device-ABC shutoff process is approximately 3 hours and 45 minutes later” is transmitted.

  Subsequently, it is determined whether or not the predicted time has reached the alert timing set in advance in step S45, for example, the remaining time of 2 hours until shut-off, and when the predicted time reaches 2 hours which is the alert timing, the process proceeds to step S46. Proceed and notify that the compensation time until shutoff is 2 hours. Specifically, in step S46, an e-mail with the content “The power supply device-ABC shutoff process will start two hours from now” is transmitted.

  Subsequently, in step S47, it is determined whether or not the dynamic battery compensation time is calculated. When the dynamic battery compensation time is calculated and the compensation time is output, the process until the shut-off is performed in step S48. Notify the person in charge of remaining time by email. In the mail in step S48, for example, a mail with the content “Power supply device-ABC shuts off at 16:32 and investigate affected customers” is transmitted.

  The notification of the calculation result of the dynamic battery compensation time in steps S47 and S48 is repeated until the shut-off is determined in step S49, and the remaining contents until the shut-off in 1 minute units from the mail contents transmitted every polling cycle. The time is notified sequentially, and the shut-off can be known when the remaining time is zero. Note that shutoff may be determined from status information acquired by polling because there is a slight shift in the predicted compensation time.

  If shut-off is determined in step S49, the process proceeds to step S50 to determine whether or not the AC line is restored. If it is determined that the AC line is restored, the process proceeds to step S51, and an e-mail notifying the AC line restoration is transmitted. For example, an e-mail with the content “AC line restarts at 16:35” is transmitted. Of course, the content of the mail in the failure message output processing in steps S41 to S51 can be determined as appropriate.

  In the management server 12 in the present embodiment, the state of the power supply device 36 with respect to the main database 50 and the battery compensation time together with the notification of the battery compensation time by mail transmission by the failure message output processing shown in FIG. Through the storage of data, the status of many power supply devices that supply battery power and the estimated compensation time until shut-off, etc. are displayed to the client 14 in a list format, etc., and the handling process for the occurrence of failure is appropriately managed and operated. Can be displayed.

The present invention includes appropriate modifications that do not impair the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

Here, the gist of the present invention is enumerated as follows.
(Summary)

(Summary 1) (System)
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power is switched from the battery to convert the DC power into AC power and supplied to the CATV transmission path. A power supply device;
A state monitoring unit that detects and monitors the state of the power supply device including the battery voltage at predetermined intervals from the head end side;
During a normal time, the power supply device is switched to power supply from a battery, a remote test processing unit that detects a prediction start point from a predetermined change in the battery voltage and measures a prediction start voltage;
When the state monitoring unit detects switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, it detects the arrival at the prediction start point from a predetermined change in the battery voltage after switching detection, A static prediction unit that predicts a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the prediction start voltage measured by the remote test processing unit;
Each time the battery voltage is detected by the state monitoring unit after a predetermined time has elapsed from the prediction start point, the battery voltage is calculated based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween. A dynamic prediction unit for predicting a dynamic compensation time until the time of
A failure information distribution unit that generates and distributes failure information including the compensation time predicted by the static prediction unit and the dynamic prediction unit;
A power supply monitoring system for a CATV transmission line.

(Summary 2) (Server function)
In the CATV transmission line power supply monitoring system according to the first aspect, the state monitoring unit, the static prediction unit, the dynamic prediction unit, and the failure information distribution unit are provided in a server machine arranged on the head end side. A power supply monitoring system for a CATV transmission line.

(Summary 3) (Remote test with full charge)
In the CATV transmission line power supply monitoring system according to summary 1, the remote test unit switches to battery power supply on the condition that the battery is in a fully charged state and detects a prediction start point. Transmission line power supply monitoring system.

(Summary 4) (Detection of prediction start point)
In the power supply monitoring system for the CATV transmission line according to the first aspect, the remote test unit and the static prediction unit have a minimum point where the battery voltage after switching to battery power supply stops decreasing after decreasing from the voltage at the time of switching. A power supply monitoring system for a CATV transmission line, wherein a measurement point immediately before starting a continuous decrease after reaching and recovering from the minimum point is detected as a prediction start point.

(Summary 5) (Rough static prediction)
In the CATV transmission line power supply monitoring system according to the first aspect, the static prediction unit further detects when the state monitoring unit detects switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device. A static compensation time until the battery voltage at the time of switching is reduced to a predetermined shut-off voltage at which the battery power supply is stopped is presumed as the predicted start voltage, and a CATV transmission line characterized in that Power supply monitoring system.

(Summary 6) (Details of static prediction)
In the CATV transmission line power supply monitoring system according to the first aspect or the fifth aspect, the static prediction unit includes the prediction start voltage measured in advance and the AC output voltage measured at the prediction start point by the state monitoring unit. And the AC output current, and a predetermined constant of the power supply device determined in advance, calculate the power generation capacity and load power of the power supply device, and divide the power generation capacity by the load power to calculate the static compensation A power supply monitoring system for a CATV transmission line, characterized in that time is calculated.

(Summary 7) (Dynamic time prediction using multi-order polynomial)
In the CATV transmission line power supply monitoring system according to the first aspect, the dynamic prediction unit calculates a dynamic compensation time until the battery voltage decreases to the shut-off voltage based on a multi-order polynomial. CATV transmission line power supply monitoring system.

(Summary 8) (Dynamic time prediction using cubic polynomial)
In the CATV transmission line power supply monitoring system according to summary 7, each time the dynamic prediction unit measures the battery voltage by the state monitoring unit, the measurement battery voltage at the measurement start point, the current measurement battery voltage, and Based on the measured battery voltage at the midpoint between the prediction start point and the current point, find the constant of each term of the cubic polynomial, substitute the current measured battery voltage for the variable of each term, and the battery voltage is shut off. A power supply monitoring system for a CATV transmission line, which calculates a dynamic compensation time until the voltage drops.

(Summary 9) (Distribution information when switching batteries)
6. The power supply monitoring system for a CATV transmission line according to claim 5, wherein the fault information distribution unit detects the switching of the power supply from the AC power supply to the battery by the state monitoring unit when the AC power supply is switched to the battery. A power supply monitoring system for a CATV transmission line, which generates and distributes fault information including a schematic static compensation time until switching to a power source and shut-off calculated by the static prediction unit.

(Summary 10) (Distribution information when the prediction start point is detected)
In the power supply monitoring system for the CATV transmission line according to summary 1, the failure information distribution unit is calculated by the static prediction unit when the static prediction unit detects arrival at the prediction start point. A power supply monitoring system for a CATV transmission line, which generates and distributes fault information including static compensation time until shut-off.

(Summary 11) (Distribution of remaining time by dynamic prediction)
In the power supply monitoring system for a CATV transmission line according to summary 1, the fault information distribution unit includes a fault including the dynamic compensation time every time the dynamic prediction unit calculates the dynamic compensation time until shut-off. A power supply monitoring system for a CATV transmission line, characterized in that information is generated and distributed.

(Summary 12) (Information distribution from shut-off to recovery)
In the CATV transmission line power supply monitoring system according to the first aspect, the failure information distribution unit includes:
When the state monitoring unit detects a battery shut-off, it generates and distributes fault information including a shut-off time and a serious fault occurrence message,
Thereafter, when recovery of the AC power supply is detected by the state monitoring unit, fault information including a recovery time and a recovery message is generated and distributed, and the CATV transmission line power supply monitoring system is characterized.

(Summary 13) (Method)
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power is switched from the battery to convert the DC power into AC power and supplied to the CATV transmission path. A state monitoring step of detecting and monitoring the state including the battery voltage of the power supply device from the head end side at predetermined intervals;
Remote test processing step of measuring the prediction start voltage by detecting the prediction start point from a predetermined change of the battery voltage by switching the power supply device to power supply from the battery at normal time,
When detecting in the state monitoring step when switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, the arrival at the prediction start point is detected from a predetermined change in the battery voltage after switching detection, A static prediction step of predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the prediction start voltage measured in the remote test processing step;
Each time the battery voltage is detected by the state monitoring step after a predetermined time has elapsed from the prediction start point, the battery voltage is calculated based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween. A dynamic prediction step for predicting a dynamic compensation time until
A failure information distribution step of generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
A power supply monitoring method for a CATV transmission line, comprising:

(Summary 14) (Detection of prediction start point)
14. The power supply monitoring method for a CATV transmission line according to claim 13, wherein the remote test processing step and the static prediction step are minimum points at which the battery voltage after switching to battery power supply stops decreasing after the voltage at the time of switching decreases. A method for monitoring the power supply of a CATV transmission line, wherein a measurement point immediately before starting a continuous decrease after recovering from the minimum point and detecting a continuous decrease is detected as a prediction start point.

(Summary 15) (Details of static prediction)
In the power supply monitoring method for a CATV transmission line according to summary 13, the static prediction step includes the prediction start voltage measured in advance, the AC output voltage measured at the prediction start point by the state monitoring unit, and the AC Based on the output current and a predetermined constant of the power supply device determined in advance, the power generation capacity and load power of the power supply device are calculated, and the static compensation time is calculated by dividing the power generation capacity by the load power. A power supply monitoring method for a CATV transmission line, characterized by:

(Summary 16) (Dynamic time prediction using multi-order polynomial)
14. The power supply monitoring method for a CATV transmission line according to claim 13, wherein the dynamic prediction step includes a measurement battery voltage at a measurement start point, a current measurement battery voltage, and a current measurement battery voltage each time a battery voltage is measured in the state monitoring step. Based on the measured battery voltage at the midpoint between the prediction start point and the current point, find the constant of each term of the cubic polynomial, substitute the current measured battery voltage for the variable of each term, and the battery voltage is shut off. A power supply monitoring method for a CATV transmission line, comprising: calculating a dynamic compensation time until the battery voltage drops to the shut-off voltage based on a multi-order polynomial for calculating a dynamic compensation time until the voltage drops. .

(Summary 17) (Program)
On the computer,
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power is switched from the battery to convert the DC power into AC power and supplied to the CATV transmission path. A state monitoring step of detecting and monitoring the state including the battery voltage of the power supply device from the head end side at predetermined intervals;
Remote test processing step of measuring the prediction start voltage by detecting the prediction start point from a predetermined change of the battery voltage by switching the power supply device to power supply from the battery at normal time,
When detecting in the state monitoring step when switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, the arrival at the prediction start point is detected from a predetermined change in the battery voltage after switching detection, A static prediction step of predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the prediction start voltage measured in the remote test processing step;
Each time the battery voltage is detected by the state monitoring step after a predetermined time has elapsed from the prediction start point, the battery voltage is calculated based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween. A dynamic prediction step for predicting a dynamic compensation time until
A failure information distribution step of generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
A CATV transmission line power supply monitoring program characterized in that

(Summary 18) (Detection of prediction start point)
In the power supply monitoring program for the CATV transmission line according to summary 17, the remote test processing step and the static prediction step are the minimum points where the battery voltage after switching to battery power feeding stops decreasing after the voltage at the time of switching decreases. A CATV transmission line power supply monitoring program that detects a measurement point immediately before starting a continuous decrease after recovery from the minimum point as a prediction start point.

(Summary 19) (Details of static prediction)
In the CATV transmission line power supply monitoring program according to summary 17, the static prediction step includes the prediction start voltage measured in advance, the AC output voltage measured at the prediction start point from the state monitoring step, and the AC Based on the output current and a predetermined constant of the power supply device determined in advance, the power generation capacity and load power of the power supply device are calculated, and the static compensation time is calculated by dividing the power generation capacity by the load power. A power monitoring program for a CATV transmission line, characterized by calculating.

(Summary 20) (Dynamic time prediction by multi-order polynomial)
In the power supply monitoring program for a CATV transmission line according to summary 17, the dynamic prediction step measures the measurement battery voltage at the measurement start point, the current measurement battery voltage, and the measurement voltage every time the state monitoring step measures the battery voltage. Based on the measured battery voltage at the midpoint between the prediction start point and the current point, find the constant of each term of the cubic polynomial, substitute the current measured battery voltage for the variable of each term, and the battery voltage is shut off. A power supply monitoring program for a CATV transmission line, which calculates a dynamic compensation time until the battery voltage drops to the shut-off voltage based on a multi-order polynomial for calculating a dynamic compensation time until the voltage drops. .

(Summary 21) (Recording medium)
On the computer,
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power is switched from the battery to convert the DC power into AC power and supplied to the CATV transmission path. A state monitoring step of detecting and monitoring the state including the battery voltage of the power supply device from the head end side at predetermined intervals;
Remote test processing step of measuring the prediction start voltage by detecting the prediction start point from a predetermined change of the battery voltage by switching the power supply device to power supply from the battery at normal time,
When detecting in the state monitoring step when switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, the arrival at the prediction start point is detected from a predetermined change in the battery voltage after switching detection, A static prediction step of predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the prediction start voltage measured in the remote test processing step;
Each time the battery voltage is detected by the state monitoring step after a predetermined time has elapsed from the prediction start point, the battery voltage is calculated based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween. A dynamic prediction step for predicting a dynamic compensation time until
A failure information distribution step of generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
A computer-readable recording medium storing a power supply monitoring program for a CATV transmission line for executing the above.

10: monitoring server 12: management server 14: client 16: network 18, 68: modem communication unit 20: head end 21: optical fiber 22: optical node 24: CATV transmission path 25: coaxial cables 26, 28, 30, 32, 34 : Amplifiers 36, 36-1, 36-2: Power supply devices 38, 38-1, 38-2: Commercial AC power supply 40: Power supply inserter 42: Status monitoring unit 44: Battery compensation time prediction unit 45: Remote test unit 46 : Static prediction unit 48: Dynamic prediction unit 50: Main database 52: Log database 54: Information management unit 56: Mail processing unit 58: AC-AC inverter 60: Changeover switch 62: AC-DC inverters 64-1 to 64 -3: battery 66: DC-AC inverter 70: state measuring unit 72: controller

Claims (15)

In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power is switched from the battery to convert the DC power into AC power and supplied to the CATV transmission path. A power supply device;
A state monitoring unit that detects and monitors the state of the power supply device including the battery voltage at predetermined intervals from the head end side;
During a normal time, the power supply device is switched to power supply from a battery, a remote test processing unit that detects a prediction start point from a predetermined change in the battery voltage and measures a prediction start voltage;
When the state monitoring unit detects switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, it detects the arrival at the prediction start point from a predetermined change in the battery voltage after switching detection, A static prediction unit that predicts a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the prediction start voltage measured by the remote test processing unit;
Each time the battery voltage is detected by the state monitoring unit after a predetermined time has elapsed from the prediction start point, the battery voltage is calculated based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween. A dynamic prediction unit for predicting a dynamic compensation time until the time of
A failure information distribution unit that generates and distributes failure information including the compensation time predicted by the static prediction unit and the dynamic prediction unit;
A power supply monitoring system for a CATV transmission line.
2. The CATV transmission line power supply monitoring system according to claim 1, wherein the state monitoring unit, the static prediction unit, the dynamic prediction unit, and the failure information distribution unit are provided in a server machine arranged on a head end side. A power supply monitoring system for a CATV transmission line.
2. The power supply monitoring system for a CATV transmission line according to claim 1, wherein the remote test unit detects a prediction start point by switching to battery power supply on condition that the battery is in a fully charged state. CATV transmission line power supply monitoring system.
2. The power supply monitoring system for a CATV transmission line according to claim 1, wherein the remote test unit and the static prediction unit are minimum points where the battery voltage after switching to battery power supply stops decreasing after the voltage at the time of switching decreases. The CATV transmission line power supply monitoring system is characterized in that a measurement point immediately before starting a continuous decrease after recovering from the minimum point is detected as a prediction start point.
2. The CATV transmission line power supply monitoring system according to claim 1, wherein the static prediction unit further detects the switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device by the state monitoring unit. A CATV transmission line characterized in that a static compensation time until the voltage drops to a predetermined shut-off voltage for stopping battery power supply is roughly estimated considering the battery voltage at the time of switching as the predicted start voltage. Power supply monitoring system.
6. The CATV transmission line power supply monitoring system according to claim 1 or 5, wherein the static prediction unit includes the pre-measured prediction start voltage and the AC output measured at the prediction start point by the state monitoring unit. Based on the voltage, the AC output current, and a predetermined constant of the power supply device determined in advance, the power generation capacity and load power of the power supply device are calculated, the power generation capacity is divided by the load power and the static A power supply monitoring system for a CATV transmission line, which calculates a compensation time.
2. The power supply monitoring system for a CATV transmission line according to claim 1, wherein the dynamic prediction unit calculates a dynamic compensation time until the battery voltage drops to the shut-off voltage based on a multi-order polynomial. A power supply monitoring system for a CATV transmission line.
8. The power supply monitoring system for a CATV transmission line according to claim 7, wherein the dynamic prediction unit measures the measurement battery voltage at the measurement start point and the current measurement battery voltage every time the state monitoring unit measures the battery voltage. Then, based on the measured battery voltage at the midpoint between the prediction start point and the current point, the constant of each term of the cubic polynomial is obtained, and the current measured battery voltage is substituted for the variable of each term, so that the battery voltage is A power supply monitoring system for a CATV transmission line, which calculates a dynamic compensation time until the voltage drops to an off voltage.
6. The power supply monitoring system for a CATV transmission line according to claim 5, wherein the fault information distribution unit detects the switching of the power supply from the AC power supply to the battery of the power supply device from the AC power supply when the state monitoring unit detects the power supply switching. A power supply monitoring system for a CATV transmission line, which generates and distributes fault information including a schematic static compensation time until switching to a battery power supply and shutoff calculated by the static prediction unit.
2. The CATV transmission line power supply monitoring system according to claim 1, wherein the failure information distribution unit is calculated by the static prediction unit when the static prediction unit detects arrival at the prediction start point. A CATV transmission line power supply monitoring system that generates and distributes fault information including static compensation time until shut-off.
2. The power supply monitoring system for a CATV transmission line according to claim 1, wherein the failure information distribution unit includes the dynamic compensation time every time the dynamic prediction unit calculates the dynamic compensation time until shut-off. A power supply monitoring system for a CATV transmission line, which generates and distributes fault information.
In the CATV transmission line power supply monitoring system according to claim 1, the failure information distribution unit includes:
When the state monitoring unit detects a battery shut-off, it generates and distributes fault information including a shut-off time and a serious fault occurrence message,
Thereafter, when recovery of the AC power supply is detected by the state monitoring unit, fault information including a recovery time and a recovery message is generated and distributed, and the CATV transmission line power supply monitoring system is characterized.
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power is switched from the battery to convert the DC power into AC power and supplied to the CATV transmission path. A state monitoring step of detecting and monitoring the state including the battery voltage of the power supply device from the head end side at predetermined intervals;
Remote test processing step of measuring the prediction start voltage by detecting the prediction start point from a predetermined change of the battery voltage by switching the power supply device to power supply from the battery at normal time,
When detecting in the state monitoring step when switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, the arrival at the prediction start point is detected from a predetermined change in the battery voltage after switching detection, A static prediction step of predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the prediction start voltage measured in the remote test processing step;
Each time the battery voltage is detected by the state monitoring step after a predetermined time has elapsed from the prediction start point, the battery voltage is calculated based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween. A dynamic prediction step for predicting a dynamic compensation time until
A failure information distribution step of generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
A power supply monitoring method for a CATV transmission line, comprising:
On the computer,
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power is switched from the battery to convert the DC power into AC power and supplied to the CATV transmission path. A state monitoring step of detecting and monitoring the state including the battery voltage of the power supply device from the head end side at predetermined intervals;
Remote test processing step of measuring the prediction start voltage by detecting the prediction start point from a predetermined change of the battery voltage by switching the power supply device to power supply from the battery at normal time,
When detecting in the state monitoring step when switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, the arrival at the prediction start point is detected from a predetermined change in the battery voltage after switching detection, A static prediction step of predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the prediction start voltage measured in the remote test processing step;
Each time the battery voltage is detected by the state monitoring step after a predetermined time has elapsed from the prediction start point, the battery voltage is calculated based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween. A dynamic prediction step for predicting a dynamic compensation time until
A failure information distribution step of generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
A CATV transmission line power supply monitoring program characterized in that
On the computer,
In normal times, the converted AC power from the commercial AC power supply is supplied to the CATV transmission line, and when the commercial AC power supply fails, the power is switched from the battery to convert the DC power into AC power and supplied to the CATV transmission path. A state monitoring step of detecting and monitoring the state including the battery voltage of the power supply device from the head end side at predetermined intervals;
Remote test processing step of measuring the prediction start voltage by detecting the prediction start point from a predetermined change of the battery voltage by switching the power supply device to power supply from the battery at normal time,
When detecting in the state monitoring step when switching to battery power supply due to a power failure of the commercial AC power supply of the power supply device, the arrival at the prediction start point is detected from a predetermined change in the battery voltage after switching detection, A static prediction step of predicting a static compensation time until the battery power supply is reduced to a predetermined shut-off voltage based on the prediction start voltage measured in the remote test processing step;
Each time the battery voltage is detected by the state monitoring step after a predetermined time has elapsed from the prediction start point, the battery voltage is calculated based on the prediction start voltage, the current detection voltage, and the detection voltage therebetween. A dynamic prediction step for predicting a dynamic compensation time until
A failure information distribution step of generating and distributing failure information including the compensation time predicted in the static prediction step and the dynamic prediction step;
A computer-readable recording medium storing a power supply monitoring program for a CATV transmission line for executing the above.

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