최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0076887 (2016-03-22) |
등록번호 | US-9935458 (2018-04-03) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 0 인용 특허 : 606 |
A direct current (DC) power combiner operable to interconnect multiple interconnected photovoltaic strings is disclosed. The DC power combiner may include a device adapted for disconnecting at least one photovoltaic string from the multiple interconnected photovoltaic strings, each photovoltaic stri
A direct current (DC) power combiner operable to interconnect multiple interconnected photovoltaic strings is disclosed. The DC power combiner may include a device adapted for disconnecting at least one photovoltaic string from the multiple interconnected photovoltaic strings, each photovoltaic string connectible by a first and second DC power line. The device may include a differential current sensor adapted to measure differential current by comparing respective currents in the first and second DC power lines. A first switch is connected in series with the first DC power line. A control module is operatively attached to the differential current sensor and the first switch. The control module may be operable to open the first switch when the differential current sensor measures the differential current to be greater than a maximum allowed current differential, thereby disconnecting the photovoltaic string from the interconnected photovoltaic strings.
1. An apparatus comprising: a differential current sensor configured to measure differential current of at least one photovoltaic string of a plurality of photovoltaic strings, the differential current measured by comparing respective currents in a first direct current (DC) power line and a second D
1. An apparatus comprising: a differential current sensor configured to measure differential current of at least one photovoltaic string of a plurality of photovoltaic strings, the differential current measured by comparing respective currents in a first direct current (DC) power line and a second DC power line that interconnect the at least one photovoltaic string to the plurality of photovoltaic strings;a first switch connected in series with the first DC power line;a second switch connected in series with the first DC power line and in parallel with the first switch, wherein the first switch is configured to allow more of a current to flow than the second switch; anda controller circuit configured to operate the first switch or the second switch in response to a measurement of the differential current from the differential current sensor. 2. The apparatus of claim 1, wherein the measurement indicates the differential current at a different level than a predetermined current differential. 3. The apparatus of claim 2, wherein the controller circuit is configured to, in response to the differential current sensor measuring the differential current at a greater level than the predetermined current differential, open the first switch and subsequently open the second switch. 4. The apparatus of claim 3, further comprising: a third switch connected in series with the second DC power line; anda fourth switch connected in series with the second DC power line and connected in parallel with the third switch,wherein the controller circuit is configured to, in response to the differential current sensor measuring the differential current at the greater level than the predetermined current differential, open the third switch and subsequently open the fourth switch. 5. The apparatus of claim 4, wherein the controller circuit is configured to operate the first switch and the third switch simultaneously and operate the second switch and the fourth switch simultaneously. 6. The apparatus of claim 1, wherein the first switch is an electro-mechanical switch and the second switch is a semiconductor. 7. The apparatus of claim 1, wherein the controller circuit is configured to, in response to the at least one photovoltaic string beginning to produce power, close the second switch and subsequently close the first switch. 8. The apparatus of claim 7, wherein the controller circuit is configured to, in response to the at least one photovoltaic string beginning to produce power, close a fourth switch and subsequently close a third switch, wherein the third switch is connected in series with the second DC power line and the fourth switch is connected in series with the second DC power line and connected in parallel to the third switch. 9. The apparatus of claim 1, wherein the second switch comprises one or more of an insulated gate bipolar transistor (IGBT), an integral diode, a solid state switch, a metal oxide semiconductor field effect transistor (MOSFET), or a field effect transistor (FET). 10. The apparatus of claim 1, wherein the first switch comprises one or more of a relay or a circuit breaker. 11. A method comprising: measuring a differential current by comparing current in a first DC power line to current in a second DC power line, the first DC power line and the second DC power line connecting at least one photovoltaic string to a plurality of photovoltaic strings; andswitching, in response to the measuring, one or more of a first switch or a second switch, the first switch connected in series with the first DC power line and the second switch connected in series with the first DC power line and connected in parallel with the first switch, wherein the first switch is configured to allow more of a current to flow than the second switch. 12. The method of claim 11, wherein the measuring indicates that the differential current is at a level different than a predetermined current differential. 13. The method of claim 12, further comprising: opening, in response to the differential current being at a greater level than the predetermined current differential, a third switch and subsequently opening a fourth switch, the third switch connected in series with the second DC power line and the fourth switch connected in series with the second DC power line and connected in parallel to the third switch. 14. The method of claim 13, wherein the first switch and the third switch are operated simultaneously and the second switch and the fourth switch are operated simultaneously. 15. The method of claim 13, further comprising: sending a notification in response to at least one of the first switch, the second switch, the third switch, or the fourth switch being closed. 16. The method of claim 11, further comprising: closing, in response to the at least one photovoltaic string beginning to produce power, the second switch and subsequently closing the first switch. 17. The method of claim 16, further comprising: closing, in response to the at least one photovoltaic string beginning to produce power, a fourth switch and subsequently closing a third switch, wherein the third switch is connected in series with the second DC power line and the fourth switch is connected in series with the second DC power line and connected in parallel to the third switch. 18. The method of claim 11, wherein the differential current is indicative of current between the first DC power line and ground. 19. The method of claim 11, further comprising: initiating a test, wherein the test comprises injecting current into one or more of the first DC power line or the second DC power line prior to and during measuring the first DC power line and the second DC power line to determine the differential current. 20. The method of claim 11, wherein the first switch comprises one or more of a relay or a circuit breaker.
Copyright KISTI. All Rights Reserved.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.