JP2016119772A5 - - Google Patents
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- JP2016119772A5 JP2016119772A5 JP2014257918A JP2014257918A JP2016119772A5 JP 2016119772 A5 JP2016119772 A5 JP 2016119772A5 JP 2014257918 A JP2014257918 A JP 2014257918A JP 2014257918 A JP2014257918 A JP 2014257918A JP 2016119772 A5 JP2016119772 A5 JP 2016119772A5
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- JP
- Japan
- Prior art keywords
- grid
- power
- inverter device
- output current
- power system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001514 detection method Methods 0.000 claims 7
- 238000012544 monitoring process Methods 0.000 claims 6
- 238000006243 chemical reaction Methods 0.000 claims 4
- 230000007257 malfunction Effects 0.000 claims 4
Claims (7)
複数のスイッチング素子を有し、前記スイッチング素子のＯＮ／ＯＦＦ動作により外部直流電源の直流電力を交流電力に変換して電力系統に出力する電力変換部と、
前記スイッチング素子が出力する出力電流が監視期間内に閾値を超えた回数を用いて、前記電力系統の系統擾乱又は前記系統連系インバータ装置の不具合を判定する制御部と、
を含むことを特徴とする系統連系インバータ装置。 A grid-connected inverter device,
A power converter that has a plurality of switching elements, converts the DC power of the external DC power source into AC power by the ON / OFF operation of the switching elements, and outputs the AC power to the power system;
Using the number of times that the output current output by the switching element exceeds a threshold value within a monitoring period, a control unit that determines a system disturbance of the power system or a malfunction of the grid-connected inverter device;
A grid interconnection inverter device comprising:
前記制御部は、
前記出力電流が前記閾値を超えた場合、前記スイッチング素子をゲートブロックしてから前記ゲートブロックを解除し、
前記監視期間内に前記出力電流が前記閾値を再度超えた場合、前記系統連系インバータ装置の不具合により過電流が発生したと判定し、前記監視期間内に前記出力電流が前記閾値を超えない場合、前記系統擾乱が発生したと判定する、
ことを特徴とする請求項１に記載の系統連系インバータ装置。 The monitoring period is a period after the control unit gate-blocks the switching element and then releases the gate block,
The controller is
When the output current exceeds the threshold, the gate block of the switching element and then the gate block is released,
When the output current exceeds the threshold again within the monitoring period, it is determined that an overcurrent has occurred due to a malfunction of the grid-connected inverter device, and the output current does not exceed the threshold within the monitoring period , Determining that the system disturbance has occurred,
The grid-connected inverter device according to claim 1.
前記ゲートブロックの解除後、前記監視期間の経過前において、前記出力電流が少なくとも一回前記閾値を超えたことにより、前記系統連系インバータ装置の不具合が発生したと判定し、
前記ゲートブロックの解除後、前記監視期間の経過前において、前記出力電流が前記閾値を超えないことにより、前記電力系統の擾乱が発生したと判定する、
ことを特徴とする請求項２に記載の系統連系インバータ装置。 The controller is
After the gate block is released and before the monitoring period elapses, the output current exceeds the threshold at least once to determine that a failure of the grid-connected inverter device has occurred,
After the release of the gate block, before the elapse of the monitoring period, it is determined that the disturbance of the power system has occurred because the output current does not exceed the threshold.
The system interconnection inverter apparatus according to claim 2 , wherein
前記制御部は、
前記電力系統の擾乱が発生したと判定した場合は、前記系統連系インバータ装置の運転を継続させ、
前記不具合により過電流が発生したと判断した場合は、連系開閉器を制御して前記系統連系インバータ装置を前記電力系統から解列する、
ことを特徴とする、請求項１または請求項２に記載の系統連系インバータ装置。 It is installed between the power conversion unit and the power system, and has a connection switch that is controlled by the control unit to switch between connection and disconnection between the power conversion unit and the power system,
The controller is
If it is determined that the power system disturbance has occurred, continue the operation of the grid-connected inverter device ,
If it is determined that an overcurrent has occurred due to the malfunction, the grid-connected inverter device is disconnected from the power grid by controlling the grid switch.
The system interconnection inverter device according to claim 1 or 2, wherein
前記電力系統の電圧を検出し、電圧検出結果を前記制御部に出力する電圧検出部と、を有し、
前記制御部は、
前記電流検出部が検出した前記出力電流が前記閾値を超えると、前記スイッチング素子のゲート端子電圧を制御することにより前記ゲートブロックを実行し、
前記電力系統の擾乱が発生したと判定し、かつ電圧検出部による電圧検出結果が正常範囲内である場合は、前記系統連系インバータ装置の運転を継続させることを特徴とする、請求項２または請求項３に記載の系統連系インバータ装置。 A current detection unit that detects an output current of the power conversion unit and outputs a current detection result to the control unit;
A voltage detection unit that detects a voltage of the power system and outputs a voltage detection result to the control unit ;
The controller is
When the output current detected by the current detection unit exceeds the threshold, the gate block is executed by controlling the gate terminal voltage of the switching element,
Determines that the disturbance of the electric power system occurs, and when the voltage detection result by the voltage detection unit is within the normal range, characterized in that to continue the operation of the system interconnection inverter device according to claim 2 or The grid connection inverter apparatus of Claim 3 .
前記スイッチング素子において発生した短絡による不具合を含むことを特徴とする、請求項１から請求項５のいずれか一項に記載の系統連系インバータ装置。 The problem of generating an overcurrent in the power conversion unit is:
6. The grid-connected inverter device according to claim 1, further comprising a malfunction due to a short circuit that occurs in the switching element. 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014257918A JP6385269B2 (en) | 2014-12-19 | 2014-12-19 | Grid-connected inverter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014257918A JP6385269B2 (en) | 2014-12-19 | 2014-12-19 | Grid-connected inverter device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2016119772A JP2016119772A (en) | 2016-06-30 |
| JP2016119772A5 true JP2016119772A5 (en) | 2017-12-28 |
| JP6385269B2 JP6385269B2 (en) | 2018-09-05 |
Family
ID=56244556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014257918A Expired - Fee Related JP6385269B2 (en) | 2014-12-19 | 2014-12-19 | Grid-connected inverter device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6385269B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732875A (en) * | 2016-08-12 | 2018-02-23 | 通用电气公司 | Solid circuit breaker and motor driven systems |
| JP7159041B2 (en) * | 2018-12-27 | 2022-10-24 | 株式会社東芝 | power converter |
| WO2020213037A1 (en) * | 2019-04-15 | 2020-10-22 | 株式会社東芝 | Power conversion device, power conversion system, and program |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001258264A (en) * | 2000-03-10 | 2001-09-21 | Shibafu Engineering Corp | Controller for voltage type self-excited converter |
| JP5286935B2 (en) * | 2008-05-27 | 2013-09-11 | パナソニック株式会社 | Distributed power supply |
-
2014
- 2014-12-19 JP JP2014257918A patent/JP6385269B2/en not_active Expired - Fee Related
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