JP4651316B2 - Battery management system for slave station of remote monitoring system for distribution line - Google Patents

Description

  The present invention relates to a battery management method for a slave station of a distribution line remote monitoring control system that can manage the battery life of the slave station used in the distribution line remote monitoring control system from a distance.

  Distribution line remote monitoring and control system is provided with slave stations corresponding to the remote control switches provided at various locations of the distribution lines between the substations, and these slave stations are monitored by the master station provided at the sales office, I can control it.

  An example of the current distribution line remote monitoring and control system will be described with reference to FIG.

  In the sales office, there is a master station 1 corresponding to each remote control system of the distribution lines, and monitoring control from the master station 1 is performed from the console 2 of each master station 1 to each slave station 8a, 8b, 8c, 8d. Is done by controlling.

  A large number of slave stations 8a, 8b, 8c, and 8d are provided on the communication line 3 from the master station 1 provided in a sales office or the like, and a remote control station group is formed. Distance control switches 7a, 7b, 7c, 7d are provided at locations of the distribution line 6 between the substations 4a, 4b corresponding to the slave stations 8a, 8b, 8c, 8d. The distance control switches 7a, 7b, 7c, and 7d obtain transmission power from the distribution line 6 and are sequentially closed when the distribution line breakers 5a and 5b are turned on, and can transmit power from the substations 4a and 4b.

  The slave station 8 a includes a monitoring control circuit unit 13, a slave station logic unit 16, and a slave station transmission unit 17. The monitoring control circuit unit 13 includes a microcomputer for controlling the opening / closing of the distance control switch 7a and the opening / closing state of the distance control switch 7a. The slave station 8a supplies a backup voltage to the monitoring control circuit unit 13 in the event of a power failure when power transmission from the other distribution line 6 stops, and supplies a charging voltage to the battery 12 by stepping down and rectifying the voltage from the distribution line 6. Is switched by the power supply unit 10 that performs charging, the battery charge / discharge management circuit unit 11 that manages the charging / discharging of the battery, and the slave station logic unit 16, and supplies the voltage from the distribution line 6 or the battery 12 to the monitoring control circuit unit 13. The power switching circuit unit 15 is included.

  The remote control switches 7a, 7b, 7c, and 7d are opened / closed by the monitoring control circuit unit 13 of the slave station, information is determined by the slave station logic unit 16, and the slave station transmission unit 17 is connected via the communication line 3. The control station 2 connected to the master station 1 is monitored and controlled to monitor the state of the distribution line 6 between the substations 4a and 4b.

  In a normal state in which power is transmitted from the substations 4a and 4b, the power supply switching circuit unit 15 is switched by the operation of the slave station logic unit 16, and the power supplied to the distribution line 6 is transferred to the slave station via the transformer 9a. The operating state is maintained.

  On the other hand, the power supplied to the distribution line 6 is rectified and stepped down by the power supply unit 10 and supplied to the battery 12 through the battery charge / discharge management circuit unit 11 and is always charged.

When a ground fault occurs in the distribution line 6 due to lightning or the like, power transmission is stopped by the accident handling function of the substation 4a, and the distance control switches 7a, 7b, 7c, and 7d are opened. When the distance control switches 7a, 7b, 7c, 7d are opened, a power failure occurs. The supervisory control circuit unit 13 monitors this to operate the slave station logic unit 16 and switches the power supply switching circuit unit 15 to supply backup power from the battery 12 to the slave station logic unit 16 and the slave station transmission unit 17. Holds the operating status of the slave station.
JP 2002-10531 A

  As described above, when a ground fault occurs and the transmission power from the distribution line is cut off, the backup operation is performed with the battery built in the slave station. Conventionally, as the battery, a lead battery is used because it can be repeatedly charged and discharged and can obtain a large amount of power at a relatively low cost. However, the lead battery cannot be backed up for a sufficient time when it deteriorates with time, and it will not be useful in an emergency. Therefore, the battery was changed regularly based on the number of years of installation.

  However, since battery deterioration varies depending on the installation environment of the slave station, if it is replaced with the same number of years of installation, the battery will deteriorate before replacement, and sufficient backup operation will not be possible when an accident occurs, or it can still be used fully It is uneconomical to replace the battery.

  In the present invention, the life of a battery used as backup power for a distribution line remote monitoring and control system operated by transmission power supplied from a distribution line is determined at a slave station, and the result is understood by a master station at a remote location. It is a thing.

  The present invention is operated by transmission power supplied from a distribution line, and is supplied from a distribution station remote monitoring control system slave station having a supervisory control circuit unit, a slave station logic unit, and a slave station transmission unit, and the distribution line A battery for supplying a backup voltage to a slave station of the distribution line remote monitoring and control system when the supply of the transmission power from the distribution line is stopped, and a battery for determining the life of the battery There is provided a battery management system for a slave station of a distribution line remote monitoring control system comprising a life determination circuit and a communication system that transmits the life determination data obtained by the battery life determination circuit to a remote master station.

  The present invention provides a battery management system for a slave station of a distribution line remote monitoring control system in which the battery life determination circuit determines the internal impedance value.

  The present invention is a plurality of distance control switches provided in the distribution lines between the substations, a monitoring control circuit that is operated by the transmission power from the distribution lines in a normal state and performs monitoring control of the distance control switches, A battery that is charged with transmission power supplied from a distribution line and supplies backup power to the monitoring control circuit when supply of transmission power from the distribution line is stopped, and a battery life determination circuit that determines the battery life A slave station of a distribution line remote monitoring control system comprising: a slave station having a master station that monitors and controls the slave station; and a communication system that transmits the life determination data obtained by the battery life determination circuit to the master station Provide management method.

  The battery life determination circuit includes an internal impedance measurement step in which the internal impedance value is measured, an internal impedance value determination step in which it is determined whether the internal impedance value is less than or equal to a predetermined internal impedance value, and the internal impedance As a result of the value determination, an open terminal voltage measuring step for measuring an open terminal voltage of the battery determined to be an internal impedance value equal to or greater than a predetermined value, and a battery determined to be equal to or lower than a predetermined open terminal voltage as a result of the open terminal voltage measurement A charging step for charging the battery for a predetermined time, an internal impedance value measuring step for measuring an internal impedance value of the charged battery, and an internal impedance value for determining whether the internal impedance value is equal to or less than a predetermined internal impedance value as a result of the internal impedance value measurement Distribution line distance consisting of judgment process Providing battery management system of the slave station of the monitoring and control system.

  The battery management system of the slave station of the distribution line remote monitoring and control system of the present invention comprises a slave station comprising a supervisory control circuit unit, a slave station logic unit, and a slave station transmission unit, and the life of a battery used as a backup of the monitor control circuit Can be constantly monitored by the master station from the slave station transmission unit, so that it is possible to accurately determine when to replace the battery of each slave station. Therefore, compared with the conventional case where the batteries of the slave stations are exchanged all at once, the batteries can be exchanged more efficiently, and the battery can be reliably used as a backup in the event of a power failure.

  An embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a system diagram of the battery management system of the distribution line remote control system of the present invention. The same parts as those in FIG.

  The master station 1 is provided at a sales office or the like, and has a console 2. The master station 1 is provided with a large number of slave stations 8 a, 8 b, 8 c, and 8 d via the communication line 3 to form a group of remote control stations. Distance control switches 7a, 7b, 7c, 7d are provided in places of the distribution line 6 between the substations 4a, 4b, and the above-mentioned slave stations correspond to the distance control switches 7a, 7b, 7c, 7d. 8a, 8b, 8c and 8d are provided. The distance control switches 7a, 7b, 7c, 7d obtain the transmission power from the distribution line 6 by closing the distribution line circuit breakers 5a, 5b in the substations 4a, 4b, and are sequentially blocked. The electric power from 4b is transmitted.

  The slave station 8 a includes a monitoring control circuit unit 13, a slave station logic unit 16, and a slave station transmission unit 17 that communicates with the master station 1. The monitoring control circuit unit 13 includes a microcomputer for controlling the opening / closing of the distance control switch 7a and the opening / closing state of the distance control switch 7a. The slave station 8a supplies a backup voltage to the monitoring control circuit unit 13 in the event of a power failure when power transmission from the other distribution line 6 stops, and supplies a charging voltage to the battery 12 by stepping down and rectifying the voltage from the distribution line 6. Power supply unit 10, battery charge / discharge management circuit unit 11 that manages charge / discharge of the battery, battery life determination circuit unit 14 that determines the life of the battery 12, and monitoring control circuit unit controlled by the slave station logic unit 16 13 includes a power supply switching circuit unit 15 that switches and supplies the voltage from the distribution line 6 or the battery 12 to the power supply unit 13.

  The other slave stations 8b, 8c, 8d have the same configuration as the slave station 8a.

  Next, the operation will be described. When the distribution circuit breakers 5a and 5b in the substations 4a and 4b are closed, the distance control switches 7a, 7b, 7c and 7d are closed, and from the substations 4a and 4b. Electric power is transmitted to various places through the distribution line 6.

  Open / close of the distance control switches 7a, 7b, 7c, 7d is monitored by the monitoring control circuit unit 13 and determined by the slave station logic unit 16, and the slave station transmission unit 17 communicates with the master station 1 via the communication line 3. The communication is monitored and controlled by the console 2 connected to the master station 1, and the state of the distribution line 6 between the substations 4a and 4b is monitored.

  In a normal state in which power is transmitted from the substations 4a and 4b, the power source switching circuit unit 15 is switched by the operation of the slave station logic unit 16, and the power supplied to the distribution line 6 is monitored and controlled via the transformer 9a. It is supplied to the circuit unit 13 and holds the operating state of the monitoring control circuit unit 13.

  On the other hand, the power supplied to the distribution line 6 is rectified and stepped down by the power supply unit 10 and supplied to the battery 12 through the battery charge / discharge management circuit unit 11 and is always charged.

  When a ground fault occurs in the distribution line 6 between the distance control switches 7a and 7b due to lightning or the like, the distribution line breaker 5a in the substation 4a detects the occurrence of the ground fault, and the distribution line breaker 5a cuts off. . Since the distribution line 6 in the power transmission range of the substation 4a has a power failure, the switch control unit of the distance control switches 7a and 7b is not powered, and therefore the distance control switches 7a and 7b are opened and a power failure occurs.

  A predetermined time after the distance control switch 7a is shut off, the distribution line circuit breaker 5a of the substation 4a is turned on to transmit power to the distance control switch 7a. The distance control switch 7a is blocked after a predetermined time since the power source of the distance control switch 7a is charged. Since the distance control switch 7a is closed, power is transmitted to the section where the ground fault occurs. Therefore, the distribution line breaker 5a in the substation 4a detects the occurrence of the ground fault again, and the distribution line breaker 5a in the substation 4a is blocked. .

  Since the power source of the distribution line circuit breaker 5a is lost, the distance control switch 7a is opened. When the distance control switch 7a is opened within a predetermined time after being turned on, the power supply side again locks the turning on when the charging power supply side is charged. After a certain period of time after the distribution line breaker 5a is cut off, the distribution line breaker 5a of the substation 4a is turned on to transmit power to the distance control switch 7a.

  On the other hand, the remote control switch 7b is disconnected from the master station 1 by remote control, and automatic charging by one-side charging is locked. The distance control switch 7c is turned on and the power is transmitted from the substation 4b to the distance control switch 7b. Accordingly, power can be transmitted except for the distance between the distance control switch 7a and the distance control switch 7b where the distribution line 6 has a ground fault, and the number of power outages due to the ground fault is reduced as much as possible. In this case, the control from the master station 1 is to be performed during a power failure due to an accident, and the slave station operates with a battery backup, and communicates to the master station 1 that the remote control switch 7a has been opened during a power failure. Since the accident cause section is separated and power is transmitted to the healthy section, the automatic introduction function of the distance control switch 7a in contact with the accident cause section can be locked by the distance control.

  By the way, since the battery 12 prepared for backup is a secondary battery that can be repeatedly charged and discharged, a relatively large amount of electric power can be taken and the lead battery is used. In a normal state in which power is transmitted from the substations 4a and 4b to the distribution line 6, the battery 12 is supplied with power from the distribution line 8 via the battery charge / discharge management circuit unit 11 and is charged. Electric power can be sufficiently supplied to the monitoring control circuit unit 13 and the like.

  Since the battery 12 deteriorates with aging and may not be used during a power failure, it must be replaced before it deteriorates. However, the secular change is greatly different depending on the usage environment of the battery 12. If the battery was replaced uniformly in an early stage with a margin, the battery 12 that can still be used would be replaced, resulting in increased waste. On the other hand, if the battery replacement time is delayed, the slave station cannot fully function in the event of a power failure as described above.

  Therefore, in the present invention, the life of the battery 12 is determined, and the result of the life determination is sent to the master station 1 so that the master station 1 can periodically understand it. The battery life determination circuit unit 14 in the slave stations 8a, 8b, 8c, and 8d periodically determines the life of the battery 12. The battery life determination circuit unit 14 measures the internal impedance of the battery 12 and the open terminal voltage to determine the life of the battery 12.

  The slave station measures the internal impedance of the battery during the operation sequence. Upon completion of the normal charging process sequence, a battery life determination start signal is applied to the battery life determination circuit unit 14.

  As shown in the flowchart of FIG. 2, when a battery life determination start signal is added to the battery life determination circuit unit 14, the internal impedance value is first measured in the internal impedance value measurement step 20 of the battery 12. The measurement result of the internal impedance value is determined in the internal impedance value determination step 21.

  FIG. 3 is a table showing pass / fail criteria, and management values are stored so that they can be individually handled, although they differ depending on the specifications of the battery used by the slave station. Judgment is based on 120% of the optimum initial value. This value has no critical meaning and is considered to be most appropriate in terms of economy and effective use of resources. As an example, a battery for an integrated slave station of 12 V, 2.5 Ah specification is judged as good if the internal impedance value is 72 mΩ or less, and a battery for a conventional slave station of 12 V, 5 Ah specification has an internal impedance value of 36 mΩ. If it is below, it is determined to be non-defective.

  The battery 12 determined as good in the internal impedance value determination step 21 is added from the battery life determination circuit unit 14 to the slave station logic unit 16 and is notified to the master station 1 from the slave station transmission unit 17 via the communication line 3 and used as it is. The The battery 12 determined to be negative in the internal impedance value determination 21 is measured for the open terminal voltage in the open terminal voltage measurement step 22.

  The open terminal voltage of the battery 12 measured in the open terminal voltage measuring step 22 determines whether or not it is a predetermined value, for example, 12.6 V or more, in an open terminal voltage determining step 23. The battery 12 determined to be No at 12.6 V or higher is determined as a defective product. Since this is notified to the master station 1 via the communication line 3, the operator who manages the master station 1 actually replaces the battery of the slave station determined to be defective by visiting the site.

  The battery 12 determined to be 12.6 V or higher in the open terminal voltage determination step 23 receives the charging voltage from the power supply unit 10 and performs the charging step 24 for 15 hours or more. After charging for 15 hours or longer, the internal impedance value is measured in the internal impedance value measuring step 25. The measurement result of the internal impedance value is determined by the internal impedance value determination unit 26.

  Even when normal charging is completed, if the battery is overdischarged, the battery may not be fully charged and the internal impedance may increase. For this reason, if the voltage is higher than the rated voltage, the internal impedance is measured again after recharging and ensuring that the battery is fully charged.

  The battery 12 determined to be equal to or less than the predetermined internal impedance value described above in the internal impedance value determining step 26 is added to the slave station logic unit 16 from the battery life determination circuit 14 and from the slave station transmission unit 17 via the communication line 3. The battery life determination result is notified to the master station 1 and used as it is.

  In the internal impedance value determination step 26, the battery 12 that is equal to or higher than the predetermined internal impedance value is determined as a defective product. Since this is notified to the master station 1 via the communication line 3, the operator who manages the master station 1 actually replaces the battery of the slave station determined to be defective by visiting the site.

  In the above description, the life determination data of the battery 12 obtained by the battery life determination circuit unit 14 is transmitted to the master station 1 using the communication line 3, but the battery 12 obtained by the battery life determination circuit 14 using PHS or the like is transmitted. The life determination information may be transmitted to the master station 1 wirelessly.

  As described above, the battery management system of the remote control system of the distribution line according to the present invention is the remote control switch 7a provided in the distribution line 6 in the distribution system in which the power from the substation is transmitted to the factory or the general household by the distribution line. , 7b, 7c, 7d were used in a distribution line remote monitoring and control system having a slave station for monitoring and controlling. However, it can also be used for battery management of a system having many power failure compensation functions such as an emergency lighting device that normally illuminates with power transmitted from a distribution line and illuminates with a battery voltage in the event of a power failure.

It is a systematic diagram of the battery management system of the slave station of the distribution line remote control system of the present invention. It is a flowchart of the battery life determination circuit used for the battery management system of the slave station of the distribution line remote control system of the present invention. It is a table | surface which shows the quality criterion of the battery used for the battery management system of the slave station of the distribution line remote control system of this invention. It is a systematic diagram of the conventional distribution line remote control system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Master station 2 Console 3 Communication line 4a, 4b Substation 5a, 5b Distribution line breaker 6 Distribution line 7a, 7b, 7c, 4d Distance control switch 8a, 8b, 8c, 8d Slave station 9a, 9b, 9c 9d dual power supply TR
DESCRIPTION OF SYMBOLS 10 Power supply part 11 Battery charge / discharge management circuit part 12 Battery 13 Monitoring control circuit part 14 Battery life determination circuit part 15 Power supply switching circuit part 16 Slave station logic part 17 Slave station transmission part

Claims (1)

A plurality of distance control switches provided in the wiring between the substations;
In a normal state, a monitoring control circuit that operates with the transmission power supplied from the distribution line and performs monitoring control of the distance control switch, and is charged with the transmission power supplied from the distribution line, and the transmission voltage from the distribution line A plurality of slave stations having a battery for supplying a backup voltage to the supervisory control circuit and a battery life determination circuit for periodically determining the battery life of each slave unit in accordance with an operation sequence when the supply of
A master station that performs monitoring and remote control of the plurality of slave stations;
It consists of a communication system that transmits life determination data obtained by the battery life determination circuit to the master station,
The battery life determination circuit first measures an internal impedance value for measuring an internal impedance value;
An internal impedance value determination step of determining whether the internal impedance value measurement is equal to or less than a predetermined internal impedance value; and
As a result of the internal impedance value measurement, when it is determined that the internal impedance value is equal to or less than a predetermined value, the step of notifying the master station that the battery is a good product and ending the measurement,
As a result of the internal impedance value measurement, the open terminal voltage of only the battery determined to be an internal impedance value equal to or greater than a predetermined value is measured, and when the open terminal voltage is equal to or greater than the predetermined voltage, the master station is informed that the battery is defective. Open terminal voltage measurement process to notify and end measurement;
As a result of the open terminal voltage measurement, a charging step of charging a battery determined to be an open terminal voltage below a predetermined value for a predetermined time;
An internal impedance value measuring step for measuring again the internal impedance value of the charged battery;
An internal impedance value determining step for determining whether the internal impedance value is measured again or less as a result of the internal impedance value measurement again, or
As a result of the internal impedance value measurement again, when it is determined that the internal impedance value is equal to or less than a predetermined value, the battery is a non-defective product, and when the internal impedance value is determined to be equal to or greater than the predetermined value, the battery is defective. It consists of the process of notifying the master station and ending the measurement,
When the battery life judgment of one slave unit is completed, a battery life judgment start signal is added to the battery life judgment circuit of the other slave unit according to the operation sequence, and the battery life judgment of a plurality of slave units is sequentially performed. Battery management system for the slave station of the distribution line remote monitoring system.

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