JP4969179B2 - Distribution line remote monitoring control system, battery deterioration diagnosis device and method - Google Patents

Description

  The present invention relates to a technique for diagnosing deterioration of a battery of a slave station in a distribution line system that supplies power to a consumer from a substation, for example.

  Conventionally, in a distribution line remote monitoring and control system that supplies power to a consumer from a substation, a slave station is provided on the distribution line corresponding to the switch (distance switch) on the distribution line. The slave station performs switching control between the open state and the closed state of the switch, monitoring of the open / close state of the switch, monitoring of the current / voltage of the distribution line, and the like. And remote monitoring control of a distribution line is performed from a parent station via a slave station by transmitting and receiving monitoring control information between the slave station and a master station provided in a business office of an electric power company.

  In such a distribution line remote monitoring control system, power for operating the slave station is normally supplied from the distribution line, but a battery is provided to supply power (backup power) for operating the slave station in the event of a power failure. ing. As this battery, generally, an inexpensive lead storage battery that can be repeatedly charged and discharged and generates a relatively large amount of power is used. Since such a battery deteriorates with aging, it is necessary to replace the battery before it deteriorates so that sufficient power cannot be supplied to the slave station in the event of a power failure.

  At the time of this replacement, the deterioration of the battery varies depending on the installation environment.For example, if the battery is replaced uniformly according to the age of installation of the battery, depending on the battery, the replacement time is too late to supply sufficient power at the time of power failure, On the other hand, a battery that is still sufficiently usable due to the replacement time being too early is also replaced and is wasted. For this reason, it is necessary to determine the deterioration of the battery and replace the battery at an appropriate time. In addition, it is desirable that the determination of the deterioration of the battery is performed by a simple process so as not to reduce the efficiency of the remote monitoring control system.

Therefore, a battery management system has been proposed in which a slave station of the distribution line remote control monitoring system is provided with a circuit for determining the battery life and the determination result is notified to the master station (Patent Document 1 below). In this battery management system, an internal impedance value is measured by a battery life determination circuit when the battery is fully charged, and if the value is larger than a predetermined value, the battery is determined to be defective (deteriorated). Then, since the non-defective / defective product determination result is notified to the master station, the master station can easily grasp the deterioration of the battery of the slave station and replace the battery at an appropriate time.
JP 2006-6074 A

  However, although the internal impedance of the battery is one of the indexes indicating the performance of the battery, it does not necessarily indicate the deterioration of the battery directly. Therefore, in some cases, the battery life may not be properly determined. . For this reason, the technique which can determine deterioration of a battery more appropriately was desired.

  In view of the above circumstances, an object of the present invention is to provide a distribution line remote monitoring control system, a battery deterioration diagnosis device, and a method capable of easily and accurately determining the deterioration of a battery of a slave station.

The distribution line remote monitoring control system of the present invention includes a slave station that is provided on the distribution line path and that is supplied with power from the distribution line, and a master station that performs remote monitoring control of the distribution line via the slave station, A distribution line remote monitoring control system having a battery for supplying power to the slave station when supply of power from the distribution line is stopped, battery voltage detection means for detecting the voltage of the battery, Battery charging for executing a process of charging the battery with power supplied from the distribution line from when the voltage detected by the battery voltage detecting means becomes equal to or lower than a predetermined value until at least a predetermined period elapses. And data indicating whether or not the process of charging the battery by the battery charging means is being executed in the master station at predetermined intervals, and a time series of the acquired data is obtained. A battery data acquisition means for collecting, on the basis of the time series of the data collected by the battery data acquisition means, and a degradation determiner means deterioration of the battery,
The deterioration determining means continuously processes the data to charge the battery from the time series of the data as a feature value for deterioration determination, continuously indicating that the process of charging the battery is being executed. At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery is not being executed to the time of indicating that the process of charging the battery is being executed next It is calculated within a predetermined determination period, and the deterioration of the battery is determined by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods with a threshold value thereof .

  According to the distribution line remote monitoring control system of the present invention, the battery charging means starts the process of charging the battery with the power supplied from the distribution line when the voltage of the battery becomes a predetermined value or less, and the predetermined period has elapsed. Then, the process which charges a battery is complete | finished. When the charging process is started, the battery voltage is charged and increased, and when the charging process is completed, the battery voltage is decreased by self-discharge. When the voltage of the battery becomes equal to or lower than the predetermined value again, the battery charging means starts the next charging process.

  At this time, in a deteriorated battery, in general, the voltage when the battery is fully charged is lowered and the self-discharge is accelerated. Therefore, the degree of deterioration of the battery is indicated by the length of the period from the end of the battery charging process to the start of the next charging process.

  Data indicating whether or not the process of charging the battery by the battery charging means is being executed is acquired at the master station at predetermined intervals. Such data generally has a small capacity, and since the data can be detected by simple processing, the data can be easily obtained at the master station. The predetermined cycle is a cycle that does not excessively increase the communication load between the master station and the slave station. For example, the predetermined cycle can be set to the same cycle as the monitoring information is acquired when the distribution line is monitored.

The battery data collection unit collects a time series of the data, and the deterioration determination unit is executing a process of charging the battery as a feature value for deterioration determination from the time series of the data. The number of consecutive times that indicates that the battery has been discharged from the time when the data indicates that the process of charging the battery is no longer being performed until the time when the process of charging the battery is next performed , Calculating at least one of the number of times of the discharging period and the number of times of the charging period within a predetermined determination period, and comparing the continuous number of times, the number of discharging periods, the number of times of the discharging period or the number of times of the charging period with their threshold values Thus, the deterioration of the battery is determined.
In other words, as the battery deteriorates, the battery voltage when the battery is fully charged is lowered and the battery self-discharge is accelerated, so the next charging process starts when the battery charging process ends. The period until it is shortened. Then, when the battery is deteriorated and the period from when the battery charging process is completed until the next charging process is started becomes sufficiently shorter than a predetermined cycle for acquiring data at the master station, In the series, the data indicates that the process of charging the battery is being executed. In addition to the above period, the discharge period is shortened, or the number of discharges or the number of charge periods within a predetermined determination period is increased. Therefore, the deterioration determination means can easily and accurately determine the deterioration of the battery by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods with their threshold values .

Next, one aspect of the battery deterioration diagnosis apparatus of the present invention is a slave station that is provided on the distribution line route and is supplied with electric power from the distribution line, and performs remote monitoring control of the distribution line via the slave station. In a remote control system for a distribution line having a master station to perform, a battery deterioration diagnosis device for diagnosing deterioration of a battery that supplies power to a slave station when supply of power from the distribution line is stopped, the battery Battery voltage detecting means for detecting the voltage of the battery, and the electric power supplied from the distribution line from when the voltage detected by the battery voltage detecting means falls below a predetermined value until at least a predetermined period elapses. A battery charging means for executing a process for charging the battery, and data indicating whether or not the process for charging the battery by the battery charging means is being executed is acquired at a master station at a predetermined cycle, A battery data acquisition means for collecting a time series of the acquired data, based on said time-series data collected by the battery data acquisition means and a degradation determiner means deterioration of the battery,
The deterioration determining means continuously processes the data to charge the battery from the time series of the data as a feature value for deterioration determination, continuously indicating that the process of charging the battery is being executed. At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery is no longer being executed to the time of indicating that the process of charging the battery is being executed next It is calculated within a predetermined determination period, and the deterioration of the battery is determined by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods with a threshold value thereof .

According to the battery deterioration diagnosis device, as described regarding the distribution line remote monitoring control system, the data indicating whether or not the process of charging the battery is being executed is easily obtained at the master station. . Then, from the time series of the data, as a feature value for deterioration determination, the number of continuous times continuously indicating that the process of charging the battery is being executed, and the data is being executed of the process of charging the battery At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery has run out to the time of indicating that the process of charging the battery is being executed next is a predetermined determination period The deterioration of the battery is determined by comparing the number of consecutive times, the discharge period, the number of discharge periods, or the number of charge periods with the threshold values. In this way, by determining the deterioration of the battery based on the time series of the data by the deterioration determination means, it is possible to easily and accurately determine the deterioration of the battery that supplies power to the slave station.

According to a second aspect of the battery deterioration diagnosis apparatus of the present invention, there is provided a slave station that is provided on a distribution line route and that is supplied with electric power from the distribution line, and a master that performs remote monitoring control of the distribution line via the slave station. In a remote control system for distribution lines having a station, when a supply of power from the distribution line is stopped, a battery for supplying power to the slave station is repeatedly charged according to the voltage. The battery deterioration diagnosis device for diagnosing the deterioration of the battery, wherein data indicating whether or not the process of charging the battery is being executed is acquired at a predetermined cycle at the master station, and the acquired Battery data collecting means for collecting a time series of data, and deterioration determining means for judging battery deterioration based on the time series of data collected by the battery data collecting means ,
The deterioration determining means continuously processes the data to charge the battery from the time series of the data as a feature value for deterioration determination, continuously indicating that the process of charging the battery is being executed. At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery is no longer being executed to the time of indicating that the process of charging the battery is being executed next It is calculated within a predetermined determination period, and the deterioration of the battery is determined by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods with a threshold value thereof .

  According to the battery deterioration diagnosis device of the second aspect, as described above, the data indicating whether or not the process of charging the battery is being executed is easily obtained at the master station. Since the time period from the end of the battery charging process to the start of the next charging process is known from the time series of the data, the deterioration of the battery is accurately determined. Therefore, according to the present invention, the deterioration determination unit can easily and accurately determine the deterioration of the battery that supplies power to the slave station by determining the deterioration of the battery based on the time series of the data. it can.

In the battery deterioration diagnosis device according to the present invention, the deterioration determination unit continuously uses the time series of the data collected by the battery data collection unit to continuously indicate that the process of charging the battery is being performed. the by calculating, it is possible to determine the deterioration of the battery based on the number of consecutive calculated within at least a predetermined determination period.

  In other words, as the battery deteriorates, the battery voltage when the battery is fully charged is lowered and the battery self-discharge is accelerated, so the next charging process starts when the battery charging process ends. The period until it is shortened. Then, when the battery is deteriorated and the period from when the battery charging process is completed until the next charging process is started becomes sufficiently shorter than a predetermined cycle for acquiring data at the master station, In the series, the data indicates that the process of charging the battery is being executed. Therefore, by determining the deterioration of the battery according to the number of continuous times by the deterioration determining means, it is possible to easily determine the deterioration of the battery with high accuracy.

Alternatively, the deterioration determination means uses the time series of the data collected by the battery data collection means to indicate that the data is no longer being processed to charge the battery, and then time to indicate that a running process of charging, by calculating a discharge period can be based on the discharge period which is calculated at least in a predetermined determination period, to determine the deterioration of the battery .

  That is, as the battery deteriorates, the voltage of the battery when it is fully charged is lowered and the self-discharge of the battery is accelerated, so that the discharge period is shortened. Therefore, by determining the deterioration of the battery according to the discharge period by the deterioration determination means, the deterioration of the battery can be easily and accurately determined.

In addition, the deterioration determining unit uses the time series of the data collected by the battery data collecting unit to indicate that the data is no longer being charged, and then charges the battery. By calculating the number of discharges within a predetermined determination period, with the period until indicating that the process is being executed as one discharge period, at least based on the calculated number of discharges Degradation can be determined.

  That is, as the battery deteriorates, the voltage of the battery when it is charged and fully charged decreases and the battery self-discharges faster, so when the battery deteriorates, it falls within a predetermined determination period. The number of discharges is greater than in the undegraded state. Therefore, by determining the deterioration of the battery according to the number of discharges by the deterioration determination means, it is possible to easily and accurately determine the deterioration of the battery of the slave station.

Next, the battery deterioration diagnosis method of the present invention includes a slave station that is provided on the distribution line and is supplied with power from the distribution line, and a remote station that performs remote monitoring control of the distribution line via the slave station In a remote control system for distribution lines, the battery deterioration diagnosis method for diagnosing deterioration of a battery that supplies power to a slave station when the supply of power from the distribution line is stopped, the voltage of the battery being The battery voltage detection step to detect, and the battery is charged with the power supplied from the distribution line from when the voltage detected in the battery voltage detection step becomes equal to or lower than a predetermined value until at least a predetermined period elapses. A battery charging step for executing processing, and data indicating whether or not the processing for charging the battery in the battery charging step is being executed at the master station at predetermined intervals. Determining the deterioration of the battery based on the data acquisition step to be obtained, the battery data collection step for collecting the time series of the data acquired in the data acquisition step, and the time series of the data collected in the battery data collection step Including a deterioration determination step ,
In the deterioration determination step, a process of charging the battery by the data for a continuous number of times continuously indicating that the process of charging the battery is being executed as a characteristic value for deterioration determination from the time series of the data. At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery is no longer being executed to the time of indicating that the process of charging the battery is being executed next It is calculated within a predetermined determination period, and the deterioration of the battery is determined by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods with a threshold value thereof .

According to the battery deterioration diagnosis method of the present invention, as described with respect to the distribution line remote monitoring control system, the data indicating whether or not the process of charging the battery is being performed is performed by the master station in the data acquisition step. It is easily acquired. Then, from the time series of the data, as a feature value for deterioration determination, the number of continuous times continuously indicating that the process of charging the battery is being executed, and the data is being executed of the process of charging the battery At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery has run out to the time of indicating that the process of charging the battery is being executed next is a predetermined determination period The deterioration of the battery is determined by comparing the number of consecutive times, the discharge period, the number of discharge periods, or the number of charge periods with the threshold values. Thus, in the deterioration determination step, it is possible to easily and accurately determine the deterioration of the battery that supplies power to the slave station by determining the deterioration of the battery based on the time series of the data.

  The distribution line remote monitoring and control system of the embodiment shown in FIGS. 1 and 2 performs slave monitoring and control of the distribution line 6 via the slave stations 8a to 8d provided on the route of the distribution line 6 and these slave stations. And a master station 1 to perform. The distribution line 6 is for connecting the substations 4a and 4b and the consumer and supplying power to the consumer. When the circuit breakers 5a and 5b of the substations 4a and 4b are connected, electric power is supplied to the consumer via the distribution line 6. Moreover, on the path | route of the distribution line 6, the switch (distance switch) 7a-7d which switches the connection state (closed) and interruption | blocking state (open) of the path | route of the distribution line 6 is provided. In the switches 7a to 7d, sensors for measuring the current, voltage and the like of the distribution line 6 are incorporated. Further, the switches 7 a to 7 d are operated by electric power supplied from the distribution line 6.

  The slave stations 8a to 8d are provided corresponding to the switches 7a to 7d, respectively. In addition, the distribution line 6 is branched in order to supply the electric power from the substations 4a and 4b to a plurality of consumers, and the switches 7a to 7d and the slave stations 8a to 8d are, for example, each of the distribution lines 6. It is placed above the branch point and above each consumer.

  In addition, transformers 9a to 9d for supplying power from the distribution line 6 to the slave stations 8a to 8d are provided in the vicinity of the slave stations 8a to 8d. The transformers 9a to 9d are connected to the distribution line 6, step down the voltage of the distribution line 6 to 110V, and supply the power as power for the slave stations 8a to 8d. Further, in the vicinity of the slave stations 8a to 8d, batteries 10a to 10d that supply power to the slave stations 8a to 8d when the supply of power from the distribution line 6 is stopped are provided. For example, lead-acid batteries are used for the batteries 10a to 10d.

  The slave stations 8a to 8d perform switching control of the switching states of the switches 7a to 7d, monitoring of the switching states of the switches 7a to 7d, monitoring of current / voltage information of the distribution line 6, and the like. The slave stations 8a to 8d perform charging of the batteries 10a to 10d, voltage of the batteries 10a to 10d, and the like. Further, the slave stations 8a to 8d transmit / receive monitoring control information to / from the master station 1 provided in the sales office of the electric power company via the transmission path 3. The transmission path 3 is a dedicated communication line owned by an electric power company, and for example, an overhead ground line, a metal communication cable, an optical communication cable, or the like is used.

  The master stations 18a to 8d include a communication management unit 15 that manages communication with the slave stations 8a to 8d, and a system management unit 16 that controls power distribution. The master station 1 is connected to a console 2 for presenting information to an operator at the sales office or for input operation by the operator. The communication management unit 15 always performs monitoring polling, and acquires monitoring information such as the switching states of the switches 7a to 7d and the voltages of the batteries 10a to 10d from the slave stations 8a to 8d. The system management unit 16 performs monitoring control of power distribution during normal operation, recovery from power failure, and the like. Further, the system management unit 16 manages the slave station state database (not shown) in which the monitoring information of the slave stations 8a to 8d acquired by the communication management unit 15 is stored, and the battery 10a according to the transmission request. It has a function (battery data transmission function) for transmitting battery data such as a voltage of 10 to 10d.

  Further, a computer (battery data collection personal computer) 11 for collecting and analyzing battery data is connected to the master station 1 via a serial communication cable 11a. The computer 11 uses a battery data collection unit 17 that makes a transmission request to the system management unit 16 of the master station 1 and collects the time series of the battery data of the slave stations 8a to 8d, and the time series of the collected battery data. A battery deterioration determination unit 18 that determines deterioration of the batteries 10a to 10d is provided.

  Next, one slave station 8a will be described in more detail. The other slave stations 8b to 8d have the same configuration.

  The slave station 8a is an electronic unit composed of a microcomputer or the like, and includes a slave station unit 12, a switch control relay unit 13, and a measurement box unit. The slave station unit 12 includes a host communication unit 19 that transmits and receives monitoring control information to and from the master station 1, a control unit 20, a relay unit 21, and a power supply unit 22 that supplies power to the units 19, 20, and 21. ing.

  The switch control relay unit 13 is connected to the measurement box unit 14, the relay unit 21, the power supply unit 22, the switch 7a, and the transformer 9a. The switch control relay unit 13 is provided with a cam switch 25 for manually switching the open / close state of the switch 10a. The switch control relay unit 13 switches the open / close state of the switch 10 a in accordance with control information output from the relay unit 21 and the operation of the cam switch 25. Moreover, the relay control relay unit 13 acquires the state of the switch 7a such as pallet information and sensor information from the switch 10a. Further, the switch control relay unit 13 uses the AC voltage (100 V) output from the transformer 9 a as the power source of the switch control relay unit 13. Further, the switch control relay unit 13 supplies the AC voltage (100 V) output from the transformer 9 a to the power supply unit 22.

  The measurement box unit 14 is connected to the switch control relay unit 13, acquires sensor information of the switch 10 a via the switch control relay unit 13, and the voltage, current, power, etc. of the distribution line 6. Measure. Moreover, the measurement box unit 14 has a protection function, detects an abnormality, and automatically disconnects from the switch control relay unit 13.

  The control unit 20 outputs a control command to each unit 19, 21, 22 of the slave station unit 12. In addition, the control unit 20 optically communicates with the measurement box unit 14 and acquires measurement data of the distribution line 6. The control unit 20 optically communicates with the switch control relay unit 13 to acquire sensor information of the switch 10a. Further, the control unit 20 outputs the control information of the switch 7 a to the switch control relay unit 13 via the relay unit 21. Further, the control unit 20 acquires the state of the switch control relay unit 13 and the state of the switch 7a via the relay unit 21. In addition, the control unit 20 communicates control information from the parent station 1 and monitoring information to the parent station 1 with the upper communication unit 19.

  The power supply unit 22 is provided with a power failure backup circuit 23 that charges the battery 10a in a normal state and switches the battery 10a to a unit power source during a power failure, a voltage of the battery 10a, a temperature of the battery 10a, and a power supply unit 22. And an internal measurement unit 24 for measuring the temperature of the substrate.

  Next, the power failure backup circuit 23 will be described with reference to FIG. The power failure backup circuit 23 includes an AC / DC converter 26, a charging circuit 27, a contact switch 28 for turning on / off the connection between the AC / DC converter 26 and the charging circuit 27, a battery 10 a and an internal measuring unit 24. Contact switch 29 for turning on / off the connection, contact switch 30 for turning on / off the connection between the battery 10a and each part 19, 20, 21 of the slave station, and rectifying diodes 31, 32, 33 And.

  The input side of the AC / DC converter 26 is connected to the switch control relay unit 13, and the AC voltage output from the transformer 9 a is applied via the switch control relay unit 13. The output side of the AC / DC converter 26 is connected to each part 19, 20, 21 of the slave station unit 12 via a diode 31, and the DC voltage output from the AC / DC converter 26 is connected to each part of the slave station. 19, 20, 21. The output side of the AC / DC converter 26 is connected to one end of the contact switch 28. The other end of the contact switch 28 is connected to the input side of the charging circuit 27. The output side of the charging circuit 27 is connected to the battery 10a via the diode 32.

  The contact switches 28, 29, and 30 are turned on / off by a control command from the control unit 20, respectively. When the contact switch 28 is turned on, a DC voltage is applied from the AC / DC converter 26 and the battery 10 a is charged by the charging circuit 27. When the contact switch 29 is turned on, the battery 10a and the internal measurement unit 24 are connected, and the voltage value of the battery 10a is measured. When the contact switch 30 is turned on, the DC voltage output from the battery 10 a is supplied to each unit 19, 20, 21 of the slave station unit 12 via the diode 33. The contact switch 28 is turned on for a predetermined period from when the voltage value of the battery 10a measured by the internal measurement unit 24 becomes equal to or lower than the predetermined voltage. Further, the contact switch 30 is turned on at the time of a power failure.

  The internal measuring unit 24 corresponds to the battery voltage detecting means of the present invention. The power failure backup circuit 23 corresponds to the battery charging means of the present invention. The battery data collection unit 17 corresponds to the battery data collection means of the present invention. The battery deterioration determination unit 18 corresponds to the deterioration determination means of the present invention.

  Next, the operation of the battery deterioration diagnosis device of this embodiment will be described.

  First, regarding the outline of the overall operation, in the battery deterioration diagnosis device, a battery charging process performed in the slave stations 8a to 8d, a data acquisition process performed in the master station 1, and a battery deterioration determination process performed in the computer 11 are performed. Are repeatedly executed at predetermined intervals.

In the battery charging process, the internal measurement unit 23 measures the battery voltage Vb, the battery temperature Tb, and the substrate temperature Tu. When the battery voltage Vb is equal to or lower than the predetermined voltage _Vth when the process of charging the battery is not executed at the time of a power failure, charging is started. The predetermined voltage V _th is a voltage that is slightly higher than the minimum voltage required to operate the slave stations 8a to 8d for a predetermined period (for example, 1 hour) at the time of a power failure, for example. Further, when a predetermined period T _{th has} elapsed since the start of charging, the charging is stopped. Further, during the predetermined period _Tth , when the battery temperature Tb and the substrate temperature Tu are equal to or higher than the predetermined value, the charging is interrupted and restarted when the battery temperature Tb and the substrate temperature Tu become lower than the predetermined value.

  In the data acquisition process, the communication management unit 15 acquires monitoring information such as the open / close state of the switches 7a to 7d, the current / voltage of the distribution line 6 and the battery data from the slave stations 8a to 8d by constant monitoring polling. The stored data is stored in the slave station state database of the system management unit 16. The battery data includes a battery voltage Vb, a battery temperature Tb, a substrate temperature Tu, a charging monitoring flag, a charging application flag, and an AC disconnection flag.

The charge monitoring flag is a flag indicating whether or not the process of charging the batteries 10a to 10d is started. The charge monitoring flag is set to 1 when the charging process is started, and is set to 0 otherwise. The charging application flag is a flag indicating whether or not charging is actually being performed (a DC voltage output from the AC / DC converter 26 is applied to the charging circuit 27). The charging application flag is set to 1 when charging is actually executed (within a predetermined period _Tth after the charging process is started and when the battery temperature Tb and the substrate temperature Tu are less than the predetermined value). Set, otherwise set to 0. Further, the AC disconnection flag is a flag indicating whether or not it is during a power failure (when power supply from the distribution line 6 is stopped). The AC disconnection flag is set to 1 at the time of a power failure, and is set to 0 otherwise.

  In the battery deterioration determination process, the battery data collection unit 17 collects the time series of the battery data of the slave stations 8a to 8d using the battery data transmission function of the system management unit 16 of the master station 1. Then, the battery deterioration determination unit 18 determines the deterioration of the batteries 10a to 10d based on the time series of the collected battery data. At this time, the battery deterioration determination unit 18 calculates the continuity of the charge state, the discharge period, and the number of discharges using the time series data of the charging monitoring flag, and determines the deterioration of the batteries 10a to 10d.

  Next, a detailed operation of the battery deterioration determination process of the present embodiment will be described.

  FIG. 4 shows the battery charging process. In the battery charging process, steps 1 to 8 are repeatedly executed in a first control period (for example, about 5 minutes). In each of the slave stations 8a to 8d, the battery charging process is executed in the same manner. In the following description, the battery charging process in one slave station 8a will be described.

  First, at STEP1, the internal measurement unit 23 measures the battery voltage Vb of the battery 10a. Specifically, the contact switch 29 is turned on by the voltage measurement permission command from the control unit 20, and the battery voltage Vb is measured. At this time, the internal measurement unit 23 also measures the battery temperature Tb and the substrate temperature Tu of the battery 10a.

  Next, in STEP 2, the control unit 20 confirms whether or not the process of charging the battery 10 a has been started (charging monitoring is in progress). When the charging process is not started (NO in STEP 2), the control unit 20 proceeds to STEP 3 and determines whether or not a power failure is occurring. Specifically, for example, the control unit 20 determines that a power failure is occurring when the DC voltage output from the AC / DC converter 26 is less than a predetermined value. If the determination result in STEP 3 is YES (during a power failure), the battery charging process is terminated as it is.

If the determination result in STEP 3 is NO (no power outage), the process proceeds to STEP 4 and the control unit 20 determines whether or not the battery voltage Vb is equal to or lower than a predetermined voltage V _th (for example, 12.5 V). If the determination result in STEP 4 is NO (Vb> V _th ), the battery charging process is terminated as it is.

When the determination result in STEP 4 is YES (Vb ≦ V _th ), the process for charging the battery 10a is started and the battery charging process is ended. Specifically, the contact switch 28 is turned on by the charging command of the control unit 20, and the battery 10 a is charged by the charging circuit 27.

If the determination result in STEP 2 is YES (charging monitoring is in progress), the process proceeds to STEP 6 and the control unit 20 determines whether or not it is within a predetermined period T _th (for example, 24 hours) after starting the charging process. Judging.

If the determination result in STEP 6 is NO (the predetermined period T _th has elapsed since the charging process was started), the process proceeds to STEP 7, the process for charging the battery 10a is stopped, and the battery charging process is terminated. The Specifically, the contact switch 28 is turned off by the charge stop command from the control unit 20, and the charging circuit 27 is disconnected from the battery 10a.

If the determination result in STEP 6 is YES (within a predetermined period T _th after starting the charging process), the process proceeds to STEP 8, and the control unit 20 responds to the battery temperature Tb and the substrate temperature Tu of the battery 10a. Then, a process of interrupting or resuming charging of the battery 10a is executed. Then, the battery charging process is terminated. Specifically, the control unit 20 determines that the battery temperature Tb is equal to or higher than a predetermined temperature Tb _th (for example, 50 ° C.) or the substrate temperature Tu is a predetermined temperature during charging (the contact switch 28 is in an on state). When the temperature is higher than Tu _th (for example, 50 ° C.), the contact switch 28 is turned off to interrupt charging. If the battery temperature Tb is lower than the predetermined temperature Tb _th and the substrate temperature Tu is lower than the predetermined temperature Tu _th when charging is interrupted, the control unit 20 turns on the contact switch 28. And resume charging. Whether or not the predetermined period T _th has passed in STEP 6 is determined based on the time at which charging is started in STEP 5.

  Next, with reference to FIG. 5, the data acquisition process performed in the master station 1 will be described. In the data acquisition process, the communication management unit 15 sequentially polls each communication line at a predetermined cycle Tp (for example, 3 seconds) (always monitoring polling). In the constant monitoring polling, data is acquired from the slave stations 8a to 8d according to the contents of the constant monitoring polling table. A predetermined number N (for example, 7) tables (table 1 to table 7) are set in advance in the constantly monitoring polling table, and request words for specifying data to be acquired are registered in advance in each table. . The request word includes a request word for acquiring the switching state of the switches 7a to 7d, the current / voltage of the distribution line 6, battery data (battery voltage Vb, battery temperature Tb, substrate temperature Tu, charge monitoring flag , A charging application flag, and an AC disconnection flag) are included.

  First, in the first round of polling, the communication management unit 15 acquires the data specified in Table 1. Specifically, first, the communication management unit 15 transmits the request word of Table 1 to the slave station 8a. In the slave station 8a, the upper communication unit 19 receives the request word of the table 1, and according to the received request word, data is sent from the control unit 20 to the upper communication unit 19, and the upper communication unit 19 manages communication. Data is transmitted to the unit 15. This data is received by the communication management unit 15 within the period Tp, and the received data is stored in the slave station state database. Next, after the period Tp, the communication management unit 15 transmits the request word of the table 1 to the slave station 8b and receives data similarly to the slave station 8a. Similarly, the communication management unit 15 transmits the request word of Table 1 to the slave stations 8c and 8d and receives data.

  When the first round polling is completed, the communication management unit 15 performs the second round polling and acquires the data specified in the table 2. Similarly, the communication management unit 15 performs the third to seventh polling, and acquires the data specified in the tables 3 to 7.

  The above is the details of the data acquisition process. The overall monitoring period (data acquisition period) of the data acquisition process is determined by polling period Tp × total number of slave stations × number of tables. Thereby, the data indicating the state of the batteries 10a to 10d is easily acquired by the master station 1.

  Next, the battery deterioration determination process in the computer 11 will be described.

  As shown in FIG. 6, first, the battery data collection unit 17 sends an activation command for the battery data transmission function to the system management unit 16. This transmission function is realized by the system management unit 16 executing a battery data transmission program installed in advance. This battery data transmission function is normally stopped and is activated by an activation command from the computer. When the battery data transmission function is activated, an activation response is transmitted from the system management unit 16 to the computer 11. Next, the battery data collection unit 16 transmits the battery data collection requests of all the slave stations 8a to 8d to the battery data transmission function.

  In the battery data collection request, a condition of data to be collected (a period and contents of data to be collected) is specified. As a period of data to be collected, for example, a data acquisition start date and time, a data acquisition end date and time, and a data acquisition interval (for example, 15 minutes, 20 minutes, 30 minutes, etc.) are designated. The period of data to be collected (the period from the acquisition start date to the acquisition end date) is, for example, about two weeks. Further, the contents of data to be collected are designated as, for example, the acquisition date and time of each data, battery voltage Vb, battery temperature Tb, substrate temperature Tu, charging monitoring flag, charging application flag, AC disconnection flag, and communication abnormality flag. . The communication abnormality flag is a flag indicating a state in which a communication abnormality has occurred in the slave stations 8a to 8d. The communication abnormality flag is set to 1 when a communication abnormality occurs, and is set to 0 otherwise.

  Next, the battery data transmission function refers to the slave station state database and transmits the data of the slave station 8a to the computer 11 in accordance with the conditions specified in the battery data collection request received from the computer 11. When the battery data collection unit 17 receives the data, the battery data collection unit 17 transmits a reception confirmation response (ACK). When the reception confirmation response is received, the battery data transmission function transmits data of the next slave station 8b to the computer 11. Thereafter, data is similarly transmitted to the slave stations 8c and 8d. When the transmission of all requested data is completed, the battery data transmission function is stopped.

  Next, the battery deterioration determination unit 18 determines the deterioration of the batteries 10a to 10d based on the collected data. In addition, the process which determines deterioration similarly about each battery 10a-10d is performed. Hereinafter, the battery 10a will be described as an example.

First, the battery deterioration determination unit 18 calculates a feature value for deterioration determination from the time-series data of the charging monitoring flag of the battery 10a. Specifically, the battery deterioration determination unit 18 calculates the number of consecutive times Num of data whose charge monitoring flag is 1 among the time series data of the charging monitoring flag. Next, the battery deterioration determination unit 18 determines whether or not the calculated number of consecutive times Num is equal to or greater than a predetermined threshold value Num _th , and determines the deterioration of the battery 10a. When the number of consecutive times Num is equal to or greater than the threshold value Num _th, it is determined that the battery 10a has not deteriorated. When the number of consecutive times Num is less than the threshold value Num _th , it is determined that the battery 10a has deteriorated.

  Here, the determination of the deterioration of the battery 10a will be described.

  FIGS. 7 (a) and 7 (b) illustrate how the battery voltage Vb of the slave station 8a and the charging monitoring flag change with time, respectively, from the upper side. The upper Vmax and Vmax 'in FIGS. 7A and 7B indicate the battery voltage Vb in the fully charged state, respectively. Further, 20 time-series data D1 to D20 and D1 'to D20' are schematically shown in the lower part of Figs. 7 (a) and 7 (b), respectively. 7A shows an example in which the battery 10a has not deteriorated, and the example in FIG. 7B shows an example in which the battery 10a has deteriorated.

First, as shown in FIG. 7A, before the time t1, the charging process of the battery 10a is stopped, and the battery 10a is self-discharged. At time t1, the voltage Vb becomes equal to or lower than _Vth, and the process for charging the battery 10a is started. The charging process is continued from time t1 to t2, and the period _Tth elapses. At time t2, the charging process of the battery 10a is stopped. From time t2 to t3, the battery 10a is self-discharged, and at time t3, the voltage Vb becomes equal to or lower than _Vth, and charging of the battery 10a is started. Thereafter, the charging of the battery 10a is repeated similarly to the times t1 to t3. At this time, among the continuous data D1 to D5 and D11 to D15 in which the voltage monitoring flag is 1, the maximum number of continuous times 5 is set as the voltage monitoring flag continuous number Num.

Next, as shown in FIG. 7B, the process of charging the battery 10a is continued before the time t1 ′. At time t1 ′, the period T _th has elapsed and the charging process of the battery 10a is stopped. From time t1 ′ to t2 ′, the battery 10a is self-discharged, and at time t2 ′, the voltage Vb becomes equal to or lower than _Vth, and charging of the battery 10a is started. At time t2 ′ to t3 ′, the charging process is continued and the period T _th elapses. At time t3 ′, the charging process of the battery 10a is stopped. From time t3 ′ to t4 ′, the battery 10a is self-discharged, and at time t4 ′, the voltage Vb becomes equal to or lower than _Vth, and charging of the battery 10a is started. Thereafter, similarly to the times t2 ′ to t4 ′, the charging of the battery 10a is repeated.

  At this time, the continuous count 20 of the continuous data D1 'to D20' whose voltage monitoring flag is 1 is set as the continuous count Num of the voltage monitoring flag. That is, as shown in FIG. 7B, in the state where the battery 10a is deteriorated, the battery voltage Vmax ′ in the fully charged state is lower than the battery voltage Vmax in the fully charged state in the not deteriorated state, Since the self-discharge speed is high, the discharge period is shortened. Since the discharge time is shorter than the period for acquiring the voltage monitoring flag (data acquisition period), the state where the voltage monitoring flag is 1 continues.

Then, the battery deterioration determination unit 18 determines whether or not the calculated number of consecutive times Num is equal to or greater than a threshold value Num _th (for example, 10 times), and determines the deterioration of the battery 10a. In the example shown in FIG. 7A, since the number of consecutive times Num is equal to or greater than the threshold value Num _th, it is determined that the battery 10a has not deteriorated. Further, in the example shown in FIG. 7B, since the number of consecutive times Num is less than the threshold value Num _th , it is determined that the battery 10a has deteriorated. With the above processing, according to the battery deterioration diagnosis device of the present embodiment, it is possible to easily and accurately determine the deterioration of the battery 10a of the slave station 8a.

  In the present embodiment, the battery deterioration determination unit 18 uses the number of consecutive data whose charge monitoring flag is 1 as the characteristic value for deterioration determination. However, as another embodiment, the characteristic for deterioration determination As the amount, for example, the discharge period may be calculated from the charge monitoring flag. Specifically, in the example of FIG. 7A, the discharge periods are calculated as 1.5 hours and 2 hours for the charging monitoring data D7 to D9 and D17 to D21, respectively. In the example of FIG. 7B, the charging period is calculated as 0 hours. The battery deterioration determination unit 18 determines that the battery 10a has deteriorated, for example, when the maximum value of each discharge period is equal to or less than a predetermined threshold value. That is, when the battery 10a is deteriorated, the discharge period is shortened. Thus, by determining according to the discharge period as described above, it is possible to easily determine the deterioration of the battery 10a with high accuracy.

  Further, the battery deterioration determination unit 18 may calculate and use the number of discharges or the number of charges during the data collection period from, for example, the time series data of the charge monitoring flag as the characteristic amount for deterioration determination. Further, the battery deterioration determination unit 18 may use a combination of the above-described continuous number Num, discharge period, number of discharges, or number of charges as a characteristic value for deterioration determination.

The lineblock diagram of a distribution line remote monitoring control system of an embodiment of the present invention. The block diagram of the sub_station | mobile_unit and a battery in the remote monitoring control system of FIG. FIG. 2 is a circuit diagram of a slave station and a battery in the distribution line remote monitoring and control system of FIG. 1. The flowchart which shows the battery charge process in the distribution line remote monitoring control system of FIG. The sequence diagram of the data acquisition process in the battery deterioration diagnostic apparatus of FIG. The sequence diagram of the battery data collection process in the battery deterioration diagnostic apparatus of FIG. Explanatory drawing regarding the battery deterioration determination process in the battery deterioration diagnostic apparatus of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Master station, 6 ... Distribution line, 8a-8d ... Slave station, 10a-10d ... Battery, 17 ... Battery data collection unit (battery data collection means), 18 ... Battery deterioration determination unit (deterioration determination means) 23 ... Power failure Backup circuit (battery charging means), 24... Internal measuring unit (battery voltage detecting means).

Claims (4)

In a distribution line remote monitoring control system having a slave station that is provided on the distribution line path and that is supplied with electric power from the distribution line, and a master station that performs remote monitoring control of the distribution line via the slave station,
A battery for supplying power to the slave station when supply of power from the distribution line is stopped;
Battery voltage detection means for detecting the voltage of the battery;
Battery charging for executing a process of charging the battery with power supplied from the distribution line from when the voltage detected by the battery voltage detecting means becomes equal to or lower than a predetermined value until at least a predetermined period elapses. Means,
Battery data collecting means for acquiring data indicating whether or not the process of charging the battery by the battery charging means is being executed at the master station at predetermined intervals, and collecting a time series of the acquired data; ,
Deterioration determining means for determining deterioration of the battery based on the time series of the data collected by the battery data collecting means ,
The deterioration determining means continuously processes the data to charge the battery from the time series of the data as a feature value for deterioration determination, continuously indicating that the process of charging the battery is being executed. At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery is no longer being executed to the time of indicating that the process of charging the battery is being executed next Distribution line remote monitoring characterized in that it is calculated within a predetermined determination period and the deterioration of the battery is determined by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods and their thresholds. Control system. In a distribution line remote monitoring and control system, comprising: a slave station provided on a distribution line path to which power is supplied from the distribution line; and a master station that performs remote monitoring control of the distribution line via the slave station. A battery deterioration diagnosis device that diagnoses deterioration of a battery that supplies power to the slave station when supply of power from the distribution line is stopped,
Battery voltage detection means for detecting the voltage of the battery;
Battery charging for executing a process of charging the battery with power supplied from the distribution line from when the voltage detected by the battery voltage detecting means becomes equal to or lower than a predetermined value until at least a predetermined period elapses. Means,
Battery data collecting means for acquiring data indicating whether or not the process of charging the battery by the battery charging means is being executed at the master station at predetermined intervals, and collecting a time series of the acquired data; ,
Deterioration determining means for determining deterioration of the battery based on the time series of the data collected by the battery data collecting means ,
The deterioration determining means continuously processes the data to charge the battery from the time series of the data as a feature value for deterioration determination, continuously indicating that the process of charging the battery is being executed. At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery is not being executed to the time of indicating that the process of charging the battery is being executed next A battery deterioration diagnosis device that calculates within a predetermined determination period and determines the deterioration of the battery by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods with a threshold value thereof. . In a distribution line remote monitoring and control system, comprising: a slave station provided on a distribution line path to which power is supplied from the distribution line; and a master station that performs remote monitoring control of the distribution line via the slave station. Battery deterioration diagnosis for diagnosing deterioration of the battery when the process of charging the battery that supplies power to the slave station according to the voltage is repeatedly executed when the supply of power from the distribution line is stopped A device,
Battery data collection means for acquiring data indicating whether or not the process of charging the battery is being performed at the master station at predetermined intervals, and collecting a time series of the acquired data;
Deterioration determining means for determining deterioration of the battery based on the time series of the data collected by the battery data collecting means ,
The deterioration determining means continuously processes the data to charge the battery from the time series of the data as a feature value for deterioration determination, continuously indicating that the process of charging the battery is being executed. At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery is no longer being executed to the time of indicating that the process of charging the battery is being executed next A battery deterioration diagnosis device that calculates within a predetermined determination period and determines the deterioration of the battery by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods with a threshold value thereof. . In a distribution line remote monitoring and control system, comprising: a slave station provided on a distribution line path to which power is supplied from the distribution line; and a master station that performs remote monitoring control of the distribution line via the slave station. A battery deterioration diagnosis method for diagnosing deterioration of a battery that supplies power to the slave station when supply of power from a distribution line is stopped,
A battery voltage detecting step for detecting a voltage of the battery;
Battery charging for executing a process of charging the battery with power supplied from the distribution line from the time when the voltage detected in the battery voltage detecting step becomes equal to or lower than a predetermined value until at least a predetermined period elapses. Steps,
A data acquisition step of acquiring data indicating whether or not the process of charging the battery in the battery charging step is being performed at the master station at a predetermined cycle;
A battery data collection step for collecting a time series of the data acquired in the data acquisition step;
A deterioration determination step of determining deterioration of the battery based on a time series of the data collected in the battery data collection step ,
In the deterioration determination step, a process of charging the battery by the data for a continuous number of times continuously indicating that the process of charging the battery is being executed as a characteristic value for deterioration determination from the time series of the data. At least one of a discharge period, a number of times of the discharge period, and a number of times of the charge period from the time of indicating that the battery is no longer being executed to the time of indicating that the process of charging the battery is being executed next A battery deterioration diagnosis method comprising: calculating within a predetermined determination period, and determining the deterioration of the battery by comparing the number of continuous times, the discharge period, the number of discharge periods, or the number of charge periods with a threshold value thereof. .

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