JPWO2015008467A1 - System for controlling base station apparatus connected to power system, base station apparatus, base station apparatus control apparatus and charging control method thereof - Google Patents

Abstract

A base station device that is connected to a power system base station device that is supplied with electricity from a power plant and that has a storage battery stops charging the storage battery when the power supply state of the power system is determined to be unstable and the situation. Reduce the speed or further reduce the load on the load equipment to avoid power system outages. In addition, the inter-base station apparatus control apparatus controls a plurality of base station apparatuses connected to the power system, thereby charging the storage battery connected to the base station apparatus that is required to operate more. It is possible to avoid outages while avoiding system power outages.

Description

  The present invention relates to a power storage system connected to an electric power system and a control method thereof.

  In order to perform stable communication at any time using a wireless communication terminal, power must always be supplied to a base station apparatus that communicates with the wireless communication terminal. However, when a power failure occurs, the supply of power to the base station device is interrupted, the communication is cut off, and it may take a considerable time until power transmission is restored. In particular, in countries and regions where power supply is not stable, power is not always supplied from the power system, such as daily power outages and power supply only for a limited time. Therefore, a power source other than the power system is required.

  The power source by the diesel generator is common, but there is a risk of running out of fuel, the necessity of refueling, and adverse effects on the environment. Moreover, since the driving cost may be higher than that of the power system, it is conceivable to use a storage battery that is charged from the power system.

  However, if the storage batteries of a large number of base station devices are charged at once, the power supply of the power system becomes unstable, which may cause a power failure of the power system.

JP 2010-178479 A JP 2008-141815 A JP 2013-005638 A

  The present invention is a storage battery charging control method provided in a base station apparatus in a system for controlling a plurality of base station apparatuses connected to a power system, the power supply information of the power system and the power demand information of the load facility, Storage battery charge control is performed based on storage battery storage information (amount of storage, battery temperature).

The figure which showed the base station apparatus and storage battery which were connected to the electric power system of this invention Block diagram of the base station apparatus of the present invention Block diagram of another base station apparatus of the present invention The figure which showed the base station apparatus electrical storage system of this invention The block diagram of the control apparatus between base station apparatuses of this invention The block diagram of the base station apparatus which communicates with the control apparatus between base station apparatuses of this invention

First embodiment
FIG. 1 is a diagram showing a base station apparatus and a storage battery connected to the power system of the present invention. Power is supplied from the power systems 103 to 108 to the base station apparatus 102 from the power plant 100 via the substation 110.

  FIG. 2 is a diagram showing the base station apparatus 102 of the present invention. The base station apparatus 102 includes a base station apparatus control apparatus 101, a load facility 205, and a power generation facility 208. The base station apparatus control apparatus 101 includes a power state detection unit 202, a control unit 203, and a storage battery 204 (for example, a Li ion battery). The power generation facility 208 is not necessarily provided.

  The power systems 103 to 108 branch toward the end, but the power supply becomes unstable as the end becomes the end, and the power supply becomes unstable as the amount of power used by the equipment connected to each of the power systems 103 to 108 increases. Become. If the power usage exceeds the supply for each of the power systems 103 to 108 separated at the substation, there is a high possibility that a power outage will occur. However, if an excessive load is applied, a power outage to the basic power system 103 may be caused.

  When the power generation facility 208 is provided and the power generation facility 208 is a solar power generation facility, power is supplied from the power generation facility 208 to the load facility 205, and when the power generation amount is sufficient, the storage battery 204 is charged.

  When there is no photovoltaic power generation facility, or even if there is a photovoltaic power generation facility, power cannot be generated due to the weather, power is supplied from any of the power systems 103 to 108 to the load facility 205 that cannot supply power from the photovoltaic power generation facility. Further, when it is determined that the storage battery 204 needs to be charged from the storage information such as the storage amount of the storage battery 204, the storage battery 204 is charged.

  If a power failure occurs, the control unit 203 supplies power from the storage battery 204 to the load facility 205 to continue operation of the load facility 205. However, when the storage amount of the storage battery 204 may be lost during a power failure, the control unit 203 prevents the load facility 205 from stopping by shifting the load facility 205 from the normal operation mode to the low power operation mode.

  Even if there is a power outage and there is no power storage, if the power generation facility 208 is diesel power generation that is not affected by those conditions, the power generation facility 208 can be operated by controlling power generation, and the load facility 205 can continue to operate. It becomes possible. If there is a margin in the amount of power generation, charging from the power generation facility to the storage battery 204 may be started.

  The power generation facility 208 may use both solar power generation and diesel power generation.

  When charging the storage battery 204 from any one of the power systems 103 to 108 connected to the storage battery 204 among the power systems 103 to 108, the control unit 203 normally supplies power from the power systems 103 to 108 to the load facility 205 of the base station apparatus. Control to supply. In addition, the control unit 203 controls the storage battery 204 to be charged from the power systems 103 to 108 when the storage amount of the storage battery decreases. Here, the storage battery 204 has a plurality of charging speeds. In the present embodiment, storage battery 204 has two charging modes (rapid charging and normal charging) with different charging speeds. Rapid charging can be charged in a faster time than normal charging, but uses more electricity. In preparation for a power outage, each base station device performs quick charging as much as possible. However, if rapid charging is performed simultaneously by a plurality of base station devices, the total amount of electricity used becomes enormous, so that the power supply of the power systems 103 to 108 is supplied. As a result, the power system 103 to 108 may be out of power.

  In order to avoid a power failure of the power systems 103 to 108, the base station apparatus control apparatus 101 detects power state information (frequency, voltage, current) of the power systems 103 to 108 by the power state detection unit 202. If it is determined that the power stability is unstable from the power supply state, the charging control is performed to change the charging of the storage battery 204 to normal charging or to stop charging and wait for charging. Here, the power stability is an index indicating the degree of stability of the system power, and varies depending on the amount of power supplied from the substation 110 and the amount of power used by the facilities connected to the power systems 103 to 108. When power stability deteriorates, there is a high possibility of power failure from the terminal power systems 106 to 108. If the power stability is further deteriorated, the power systems 104 and 105 heading toward the base are likely to fail. If the situation further deteriorates, there is a high possibility that the entire power system 103 to 108 will be cut off. If an excessive load is applied, it may cause a power failure to the main power system.

  Specifically, power stability is determined from power state information such as frequency, voltage, and current of the power system by monitoring the frequency, voltage, and current of the system power (power supplied from the power systems 103 to 108). To do. Regarding the frequency, when the overall load of the system power increases, the frequency of the AC signal supplied from the system power decreases. When the frequency is detected by a zero cross counter or the like and becomes lower than a predetermined frequency, it can be determined that the power stability is low. The voltage monitoring detects a decrease in voltage supplied from the grid power. Current monitoring detects a decrease in current supplied from the grid power. Voltage monitoring and current monitoring can detect the power stability of the system power with a simple configuration compared to frequency monitoring. In addition, not only the grid power frequency, voltage, and current values, but also the rapid change in grid power frequency, voltage, and current values can cause unstable power supply (ie, power stability Can also be detected.

  If it is determined that the power supply state has become stable (ie, the power stability has increased) during normal charging or charging standby, in the case of normal charging, the storage battery 204 is returned to rapid charging. When waiting for charging, charge control is performed to resume quick charge or normal charge.

  In the present embodiment, as an example, the charging speed for normal charging is set to about one third of the charging speed for quick charging, but any speed may be used regardless of this. You may make it variable according to an electric power supply state.

  Thus, by performing charge control (control of charge speed) on the storage battery while monitoring the power supply state before the power failure of the power system occurs, the power supply state becomes unstable as shown in FIG. If it judges, a certain base station apparatus will be in charge standby, and the fall of the power stability of an electric power grid | system will be prevented. Thereby, the base station apparatus control apparatus 101 of each base station apparatus can charge a storage battery, avoiding the power failure of an electric power grid | system.

  FIG. 3 is a diagram showing another base station apparatus 132 of the present invention. The base station apparatus control apparatus 101 of FIG. 2 is replaced with the base station apparatus control apparatus 301, and the load facility 305 is further controlled. From the load facility 305, power demand information such as power consumption, communication volume, importance, etc. is sent to the control unit 303. In the case where the power system is not stable enough only by charging control to the storage battery 204, the control unit 303 of the base station apparatus control device 301 shifts the load facility 305 from the normal operation mode to the low power operation mode. Prevent power system outages. In the case of the base station device, for example, by restricting the communication speed and communication area of the load facility 305, the base station device shifts to the low power operation mode and reduces power consumption. The power state detection unit 202 and the storage battery 204 may be the same as or different from those in FIG.

  As a result, in a power infrastructure environment where the grid power is unstable, the dependence on diesel power generation is reduced by avoiding power outages using power status information, power demand information, and power storage information, while maintaining stability to the load facility 305. Power can be supplied.

<< Second Embodiment >>
FIG. 4 is a diagram showing the base station apparatus power storage system of the present invention. Compared with the first embodiment, control between base station apparatuses is performed by a control apparatus 401 between base station apparatuses.

  FIG. 5 is a diagram showing an inter-base station controller 401 according to the present invention. The inter-base station apparatus control apparatus 401 includes a system monitoring unit 502 that uses power supply information such as power load information from the power supply company and planned power transmission information (or power outage information), and a plurality of base station apparatus control apparatuses described later. Receiving section 507 for receiving information from the mobile station and transmitting section 506 for transmitting control information to the base station apparatus control apparatus. Transmission / reception may be wireless, wired, a dedicated line, or a shared line. The control unit 503 generates control information for performing charging control of the storage battery of each base station device from the power load information from the power supply company, the power supply information, and the information from the plurality of base station device control devices.

  FIG. 6 is a diagram showing a base station apparatus 162 communicating with the inter-base station apparatus control apparatus 401 of the present invention. Compared with the base station apparatus control apparatus 301 in FIG. 3, the base station apparatus 162 includes a transmission unit 606 and a reception unit 607. The power state detection unit 202, the storage battery 204, and the load facility 305 may be the same as or different from those in FIG. The power generation facility 208 is not necessarily provided side by side, and transmission / reception signals with the power generation facility 208 are not shown.

  Each load facility 305 connected to the power system is provided with a power state detection unit 202 (for example, a smart meter) that monitors the power usage status (frequency, voltage, current). The power status information may be received from the transmission unit 606 of 162, and the load status of the entire grid power may be determined based on the information.

  The control unit 603 includes power state information such as the frequency, voltage, and current of the power system of the power state detection unit 202, power storage information such as the power storage amount of the storage battery 204, power consumption amount of the load facility 305, communication amount, importance, etc. Is transmitted to the inter-base station controller 401 by the transmitter 606. Based on the control information from the inter-base station controller 401 received by the receiver 607, the controller 603 performs charging control of the storage battery 204.

  When the power state detection unit 202 determines that the power supply becomes unstable and the power stability has deteriorated, the charging of the storage battery 204 is started from the quick charge in preference to the control information from the inter-base station controller 401. Normal charging may be performed or charging may be stopped.

  Alternatively, the power system is prevented from being interrupted by shifting the load facility 305 from the normal operation mode to the low power operation mode. In the case of a base station apparatus, for example, the power consumption is reduced by shifting the load facility 305 to a low power operation mode that limits the communication speed and communication area. As a result, the load on the power system can be quickly reduced, so that a power failure of the power system can be avoided. You may use control of the storage battery 204 and the load installation 305 together.

  The control unit 503 of the inter-base station apparatus control device 401 can charge power to a plurality of base station apparatuses that need to be charged in order to perform charging control of the storage battery of each base station apparatus so that the power system does not fail. If this is not expected, it is necessary to determine which base station storage battery to charge. That is, the charging priority is determined in units of power systems when considering the power supply stability of the entire power network composed of base stations or a plurality of power systems.

  The information for determining the priority includes the following.

  1) Storage amount of storage battery: Give priority to storage batteries with low remaining capacity.

  2) Power consumption of load facilities ・ ・ ・ For example, in the case of a base station apparatus, priority is given to load facilities with large power consumption such as communication volume.

  3) Remaining operating amount (1) The priority is determined from the remaining amount of operating time calculated from (1) the storage amount of the storage battery and (2) the power consumption of the load facility.

  4) Temperature: Li-ion batteries have low charging efficiency at low and high temperatures, so the priority of storage batteries for Li-ion batteries in an inappropriate temperature state is lowered.

  5) State of power generation equipment: When the storage battery is a hybrid system capable of switching between system power and power generation equipment, priority is determined from the power generation information of the power generation equipment. For example, in the case of diesel power generation, priority is given to a storage battery with a small remaining amount of diesel fuel. In the case of solar power generation, the priority is determined based on the amount of power generation and the weather.

  6) System type (Good-Grid, Average-Grid, Poor-Grid, Off-Grid, etc.) ... Priority based on information on stability of power supply for each power system (for example, average power supply time per day) Decide. For example, priority is given to an area where power supply is unstable (Poor-Grid).

  7) Installation location of storage battery ... Do not supply power to adjacent base station devices on the power system at the same time.

  The priority may be determined by combining these pieces of information.

  As described above, the control device between base station devices controls the base station device connected to the power network or the power system, so that it can be connected to the base station device that needs more operation while avoiding the power system power failure. By stopping the storage battery, it is possible to avoid the operation stop.

  The role of the control between the base station apparatus control apparatus and the base station apparatus control apparatus is an example, and is not limited to this. For example, each base station apparatus may not control the content of control at all, and may control only by the signal received from the control apparatus between base station apparatuses.

  Although it can be used for charging control of a base station device connected to the power system, it can also be applied to facilities that are desired to avoid operation stop connected to the power system.

DESCRIPTION OF SYMBOLS 100 Power station 101 Base station apparatus control apparatus 102 Base station apparatus 103,104,105,106,107,108 Power system 110 Substation 202 Electric power state detection part 203 Control part 204 Storage battery 205 Load equipment 208 Power generation equipment 301 Base station apparatus control Device 303 Control unit 305 Load equipment 401 Control device between base station devices 502 System monitoring unit 503 Control unit 506 Transmission unit 507 Reception unit 603 Control unit 606 Transmission unit 607 Reception unit

Claims (58)

A charge control method for a storage battery provided in a base station device in a system for controlling a plurality of base station devices connected to a power system,
The base station device includes a load facility and a base station device control device,
The charge control method characterized by performing charge control of the said storage battery based on the electric power state information of the said electric power grid | system, the power demand information of the said load installation, and the electrical storage information of the said storage battery.     The charge control method according to claim 1, wherein when the power stability of the power system deteriorates, the charge rate is reduced or the charge is temporarily stopped.     The charge control method according to claim 1, wherein a charge priority is determined for each power system based on power supply information of the power system, power demand information of the load facility, and power storage information of the storage battery.     2. The charging control method according to claim 1, wherein a charging priority is determined for each base station apparatus based on power supply information of the power system, power demand information of the base station apparatus, and storage information of the storage battery. .     The charge control method according to claim 1, wherein the load facility is controlled based on the power state information, the power demand information, and the power storage information.     The charge control method according to claim 1, comprising a power generation facility and performing power generation control.     The charge control method according to claim 6, wherein the power generation is controlled based on the power generation information.     The charge control method according to claim 1, wherein the load facility is operated by the storage battery during a power failure.   Furthermore, charge control of the said storage battery is performed based on the power supply information of the said electric power grid | system, The charge control method of Claim 1 characterized by the above-mentioned.     The charge control method according to claim 3, wherein the power supply information is planned power outage information.     The charge control method according to claim 1, wherein the power demand information of the load facility includes any one of power consumption, communication amount, and importance.     The charge control method according to claim 1, wherein the storage information of the storage battery is a storage amount and a battery temperature.     The charge control method according to claim 3, wherein the power supply information is at least one of a frequency, a voltage, and a power supply information current of the power system.     The charge control method according to claim 1, wherein the control of the load facility is at least one of a communication speed limit and a communication area limit.     The charge control method according to claim 7, wherein the power generation information is at least one of power generation amount, fuel, and weather. A system for controlling a plurality of base station devices connected to a power system,
The base station device includes a load facility and a base station device control device, and has a storage battery.
A system for controlling a base station apparatus, wherein charge control of the storage battery is performed based on power state information of the power system, power demand information of the load facility, and storage information of the storage battery.     The system for controlling a base station apparatus according to claim 16, wherein when the power stability of the power system deteriorates, the charging speed is reduced or the charging is temporarily stopped.   The system for controlling a base station apparatus according to claim 16, further comprising charging control of the storage battery based on power supply information of a power system.     The system for controlling a base station apparatus according to claim 18, wherein the power supply information is planned power outage information.     The system for controlling a base station apparatus according to claim 16, wherein the power demand information of the load facility includes any one of power consumption, communication amount, and importance.     The system for controlling a base station apparatus according to claim 16, wherein the power storage information of the storage battery is a power storage amount and a battery temperature.     The system for controlling a base station apparatus according to claim 18, wherein the power supply information is at least one of a frequency, a voltage, and a current of the power system.     The system for controlling a base station apparatus according to claim 16, wherein the control of the load facility is at least one of a communication speed restriction and a communication area restriction.     The system for controlling a base station apparatus according to claim 16, comprising a power generation facility and performing power generation control.     The system for controlling a base station apparatus according to claim 24, wherein power generation is controlled based on power generation information.     The system for controlling a base station apparatus according to claim 25, wherein the power generation information is at least one of a power generation amount, fuel, and weather.     The base station apparatus connected to the system which controls the base station apparatus of Claim 16. A base station apparatus control apparatus connected via a communication line with a control apparatus between base station apparatuses that controls a plurality of base station apparatuses connected to a power system,
The base station device includes a load facility and a base station device control device, and has a storage battery.
A receiving unit that receives control information generated in the inter-base station controller based on the power status information of the power system, the power demand information of the load facility, and the storage information of the storage battery, and received by the receiving unit A base station apparatus control apparatus that performs charging control of the storage battery based on the control information.     The base station apparatus control apparatus according to claim 28, wherein when the power stability of the power system deteriorates, the charging speed is reduced or the charging is temporarily stopped.   29. The base station apparatus control device according to claim 28, further comprising performing charging control of the storage battery based on power supply information of the power system.     29. The base station apparatus control apparatus for controlling a base station apparatus according to claim 28, comprising a power generation facility and performing power generation control.     32. The base station apparatus control apparatus for controlling a base station apparatus according to claim 31, wherein power generation control is performed based on power generation information.     The base station apparatus control apparatus according to claim 28, wherein the power supply information is planned power outage information.     The base station apparatus control apparatus according to claim 28, wherein the power demand information of the load facility includes any one of power consumption, communication volume, and importance.     The base station apparatus control apparatus according to claim 28, wherein the storage information of the storage battery is a storage amount and a battery temperature.     The base station apparatus control apparatus according to claim 32, wherein the power supply information is at least one of a frequency, a voltage, and a current of a power system.     The base station apparatus control apparatus according to claim 28, wherein the control of the load facility is at least one of a communication speed limit and a communication area limit.     The base station apparatus control apparatus according to claim 30, wherein the power generation information is at least one of a power generation amount, fuel, and weather. A charging control method for a storage battery provided in a base station device connected to a power system,
The base station device includes a load facility and a base station device control device, and has a storage battery.
The charge control method characterized by performing charge control of the said storage battery based on the electric power state information of the said electric power grid | system, the power demand information of the said load installation, and the electrical storage information of the said storage battery.     40. The charging control method according to claim 39, wherein when the power stability of the power system deteriorates, the charging speed is reduced or the charging is temporarily stopped.     40. The charging control method according to claim 39, wherein the load facility is controlled based on the power status information, the power demand information, and the power storage information.     40. The charging control method according to claim 39, comprising a power generation facility and performing power generation control.     43. The charge control method according to claim 42, wherein power generation is controlled based on power generation information.     40. The charge control method according to claim 39, wherein the load facility is operated by the storage battery during a power failure.     The charge control method according to claim 39, wherein the power demand information of the load facility includes any one of power consumption, communication amount, and importance.     The charge control method according to claim 39, wherein the storage information of the storage battery is a storage amount and a battery temperature.     The charge control method according to claim 39, wherein the control of the load facility is at least one of a communication speed limit and a communication area limit.     44. The charging control method according to claim 43, wherein the power generation information is at least one of power generation amount, fuel, and weather. A base station device with a storage battery connected to the power system,
The base station device includes a load facility and a base station device control device, and has a storage battery.
A base station apparatus that performs charging control of the storage battery based on power state information of the power system, power demand information of the load facility, and storage information of the storage battery.     50. The base station apparatus according to claim 49, wherein when the power stability of the power system deteriorates, the charging speed is reduced or charging is temporarily stopped.     The base station apparatus according to claim 49, wherein the load facility is controlled based on the power state information, the power demand information, and the power storage information.     50. The base station apparatus according to claim 49, comprising a power generation facility and performing power generation control.     53. The base station apparatus according to claim 52, wherein power generation is controlled based on power generation information.     50. The base station apparatus according to claim 49, wherein the load facility is operated by the storage battery during a power failure.     The base station apparatus according to claim 49, wherein the power demand information of the load facility includes any one of power consumption, communication amount, and importance.     The base station apparatus according to claim 49, wherein the power storage information of the storage battery is a power storage amount and a battery temperature.     The base station apparatus according to claim 49, wherein the control of the load facility is at least one of a communication speed restriction and a communication area restriction.     The base station apparatus according to claim 53, wherein the power generation information is at least one of power generation amount, fuel, and weather.

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