JP2014103831A5

JP2014103831A5 -

Info

Publication number: JP2014103831A5
Application number: JP2012256291A
Authority: JP
Filing date: 2012-11-22
Publication date: 2015-08-13
Anticipated expiration: 2032-11-22

Description

上記電力貯蔵システムの制御装置において、前記組電池の前記充放電許容範囲は、前記上限維持範囲の下限値に上限維持制御解除設定値を設け、前記充放電制御手段は、各前記二次電池のセル電圧及び前記二次電池の充電率が、前記上限維持制御解除設定値となったことを検出した場合に、充放電制御を解除することが好ましい。 The control apparatus of the power storage system, the charge and discharge allowable range of the assembled battery, the upper maintenance control unset value provided to the lower limit value of the upper maintenance range, the charge and discharge control means, each said secondary battery When it is detected that the cell voltage and the charging rate of the secondary battery have reached the upper limit maintenance control cancellation set value, it is preferable to cancel the charge / discharge control.

上記電力貯蔵システムの制御装置において、前記組電池の前記充放電許容範囲は、前記下限維持範囲の上限値に下限維持制御解除設定値を設け、前記充放電制御手段は、各前記二次電池のセル電圧及び前記二次電池の充電率が、前記下限維持制御解除設定値となったことを検出した場合に、充放電制御を解除することが好ましい。 The control apparatus of the power storage system, the charge and discharge allowable range of the assembled battery, the lower limit maintenance control unset value provided to the upper limit value of the lower limit maintenance range, the charge and discharge control means, each said secondary battery It is preferable to release the charge / discharge control when it is detected that the cell voltage and the charging rate of the secondary battery have reached the lower limit maintenance control release set value.

前記電力貯蔵システムは、各前記組電池に対応付けられた、各前記組電池間の電圧調整を行う複数のコンバータと、各前記組電池に対応付けられた、前記コンバータと前記電力系統側との間に設けられる複数の切替手段とを具備する場合に、前記充放電制御手段は、少なくとも一の前記二次電池の電池容量が、前記上限維持範囲または前記下限維持範囲に到達したことを検出した場合に、一部の前記組電池に対応付けられた前記切替手段を非接続状態にし、前記組電池に対応付けられた前記切替手段が接続状態のままとなっている他の前記組電池を、前記上限維持範囲の下限値に設けられる上限維持制御解除設定値または前記下限維持範囲の上限値に設けられる下限維持制御解除設定値まで充放電制御させることとしてもよい。 The power storage system includes a plurality of converters that perform voltage adjustment between the battery packs that are associated with the battery packs, and a converter that is associated with each battery pack and the power system side. A plurality of switching means provided in between, the charge / discharge control means detects that the battery capacity of at least one of the secondary batteries has reached the upper limit maintenance range or the lower limit maintenance range. In some cases, the switching means associated with some of the assembled batteries is disconnected, and the other switching batteries that are associated with the assembled battery remain connected. it may be a charge and discharge control to the lower limit maintenance control unset value provided to the upper limit value of the upper limit maintenance control unset value or the lower limit maintain the range provided to the lower limit of the upper maintenance range.

このように、一部の組電池を優先的に上限維持制御解除設定値（または下限維持制御解除設定値）まで充放電制御させて復帰させることにより、部分運転にて電力系統側に対して速やかな通常運転の再開を提供する。 In this way, some of the assembled batteries are preferentially charged and discharged to the upper limit maintenance control release set value (or lower limit maintenance control release set value) and returned to the power system side in partial operation. Provides a resumption of normal operation.

Claims

A power storage system control device in which a plurality of assembled batteries having secondary batteries are connected in parallel to one power converter connected to the power system,
The charge / discharge allowable range of the assembled battery indicated by a section between a charge upper limit value that is a battery capacity lower than the fully charged state and a discharge lower limit value that is a battery capacity higher than the discharge end state is provided on the charge / discharge allowable range side. At least one range among an upper limit maintenance range indicating a predetermined range from the charge upper limit value and a lower limit maintenance range indicating a predetermined range from the discharge lower limit value provided on the charge / discharge allowable range side, and the upper limit maintenance range And a normal operation range that is a section other than the lower limit maintenance range,
When it is detected that the battery capacity of at least one of the secondary batteries has reached the upper limit maintenance range or the lower limit maintenance range, all the assembled batteries are charged / discharge controlled in the direction of the normal operation range. A control device for a power storage system comprising a discharge control means.

2. The power storage system according to claim 1, wherein the charge / discharge control unit calculates a battery capacity of the secondary battery based on at least one of a cell voltage of the secondary battery or a charge rate of the secondary battery. Control device.

When the power storage system is connected to the power system,
When the charge / discharge control means detects that the battery capacity of at least one of the secondary batteries has reached the upper limit maintenance range, the charge / discharge control means acquires a charge command from the power system side for each of the assembled batteries. The power storage system control device according to claim 1 or 2, wherein a charge restriction command for restricting charging is output regardless of whether the charge is restricted.

When the power storage system is operating alone,
The charge / discharge control means, when detecting that the battery capacity of at least one of the secondary batteries has reached the upper limit maintenance range, a charge restriction command for restricting charging so as not to charge surplus power The control apparatus of the electric power storage system in any one of Claims 1-3 which outputs.

The charge and discharge allowable range of the assembled battery, the upper maintenance control unset value provided to the lower limit value of the upper maintenance range,
The charge / discharge control means cancels charge / discharge control when detecting that the cell voltage of each secondary battery and the charge rate of the secondary battery have reached the upper limit maintenance control release set value. The control apparatus of the electric power storage system in any one of Claims 2-4.

The charge / discharge control means forcibly causes each of the assembled batteries to be charged with a predetermined value when detecting that the battery capacity of at least one of the secondary batteries has reached the lower limit maintenance range. The power storage system control device according to any one of claims 1 to 5, which outputs a charge command.

The charge and discharge allowable range of the assembled battery, the lower limit maintenance control unset value provided to the upper limit value of the lower limit maintenance range,
The charge / discharge control means cancels charge / discharge control when detecting that the cell voltage of each secondary battery and the charge rate of the secondary battery have reached the lower limit maintenance control release set value. The control apparatus of the electric power storage system in any one of 1-6.

The charge / discharge control means acquires from the predetermined value or the power system side for each assembled battery when detecting that the battery capacity of at least one of the secondary batteries has reached the lower limit maintenance range. The control apparatus of the electric power storage system in any one of Claims 1-7 which makes it charge by either one big charge value among the charged electric power instructions.

The charge / discharge control means detects that the battery capacity of at least one of the secondary batteries has reached the lower limit maintenance range, and determines the amount of charge when a power surplus state of the power system is detected. The power storage system control device according to any one of claims 1 to 8, wherein charge / discharge control is performed by giving a gain to be increased.

10. The charge / discharge control unit according to claim 1, wherein the charge / discharge control unit performs charge / discharge control by providing a gain for suppressing charge / discharge as the battery capacity of the secondary battery approaches the charge upper limit value or the discharge lower limit value. The control apparatus of the electric power storage system in any one.

The power storage system includes:
A plurality of converters, each of which is associated with each of the assembled batteries, performs voltage adjustment between the assembled batteries;
In the case of comprising a plurality of switching means provided between the converter and the power system side associated with each assembled battery,
The charge / discharge control means, when detecting that the battery capacity of at least one of the secondary batteries has reached the upper limit maintenance range or the lower limit maintenance range, is associated with some of the assembled batteries. the switching means in a non-connected state, the other of said battery pack to said switching means associated with said battery pack is stuck in the connected state, the upper limit maintenance control release provided to the lower limit of the upper maintenance range control device for a power storage system according to any one of claims 1 to 10 until setpoint or the lower limit maintenance control unset value provided to the upper limit value of the lower limit maintaining range to charge and discharge control.

When it is detected that the power demand on the power system side is stable,
All the assembled batteries of the assembled battery in which the switching unit is in a disconnected state and the assembled battery in which the switching unit is kept in a connected state are linked to the power system, The power storage system control device according to claim 11, wherein power control is performed by each of the converters, and then normal operation is performed.

The amount of charge that has been set to the other assembled battery by switching the switching means associated with the other assembled battery to the disconnected state, setting the switching means associated with some of the assembled batteries to the connected state The control device for the power storage system according to claim 11, wherein a charge amount common to the battery pack is set as a charge amount set for a part of the assembled batteries, charge / discharge control is performed, and then the power storage system is linked.

The power storage system which comprises the control apparatus of the power storage system in any one of Claims 1-13.

A method for controlling an electric power storage system in which a plurality of assembled batteries having secondary batteries are connected in parallel to one power converter connected to an electric power system,
The charge / discharge allowable range of the assembled battery indicated by a section between a charge upper limit value that is a battery capacity lower than the fully charged state and a discharge lower limit value that is a battery capacity higher than the discharge end state is provided on the charge / discharge allowable range side. At least one range among an upper limit maintenance range indicating a predetermined range from the charge upper limit value and a lower limit maintenance range indicating a predetermined range from the discharge lower limit value provided on the charge / discharge allowable range side, and the upper limit maintenance range And a normal operation range that is a section other than the lower limit maintenance range,
When it is detected that the battery capacity of at least one of the secondary batteries has reached the upper limit maintenance range or the lower limit maintenance range, charge / discharge control is performed on all the assembled batteries in the direction of the normal operation range. A method for controlling a power storage system having a charge / discharge control process.

A control program for a power storage system in which a plurality of assembled batteries having secondary batteries are connected in parallel to one power converter connected to the power system,
The charge / discharge allowable range of the assembled battery indicated by a section between a charge upper limit value that is a battery capacity lower than the fully charged state and a discharge lower limit value that is a battery capacity higher than the discharge end state is provided on the charge / discharge allowable range side. At least one range among an upper limit maintenance range indicating a predetermined range from the charge upper limit value and a lower limit maintenance range indicating a predetermined range from the discharge lower limit value provided on the charge / discharge allowable range side, and the upper limit maintenance range And a normal operation range that is a section other than the lower limit maintenance range,
When it is detected that the battery capacity of at least one secondary battery has reached the upper limit maintenance range or the lower limit maintenance range, charge / discharge control of all the assembled batteries is performed in the direction of the normal operation range. A power storage system control program for causing a computer to execute charge / discharge control processing.