CN202522679U - Single-phase photovoltaic inverter relay failure detecting device - Google Patents
Single-phase photovoltaic inverter relay failure detecting device Download PDFInfo
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- CN202522679U CN202522679U CN2012201809024U CN201220180902U CN202522679U CN 202522679 U CN202522679 U CN 202522679U CN 2012201809024 U CN2012201809024 U CN 2012201809024U CN 201220180902 U CN201220180902 U CN 201220180902U CN 202522679 U CN202522679 U CN 202522679U
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- relay
- live wire
- collecting module
- photovoltaic inverter
- voltage
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- 238000001514 detection method Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Photovoltaic Devices (AREA)
- Inverter Devices (AREA)
Abstract
The utility model discloses a single-phase photovoltaic inverter relay failure detecting device, which is characterized by comprising a first voltage collecting module (4) and a second voltage collecting module (5), the first voltage collecting module (4) is arranged between a live wire and a zero wire which are arranged between a relay group (2) and a photovoltaic inverter inverse output end (1), the second voltage collecting module (5) is arranged between the live wire and the zero wire which are arranged between, and the first voltage collecting module (4) and the second voltage collecting module (5) are connected with a processing unit (6). The single-phase photovoltaic inverter relay failure detecting device has the advantages that the relay failure detection can be realized through the wiring voltage detection on the live wire and the zero wire outside the relay group, the detection is more convenient, and the failure judgment can be more precise.
Description
Technical field
The utility model relates to a kind of relay failure detector, particularly single-phase photovoltaic DC-to-AC converter relay failure detector.
Background technology
Relay is a very important part in the photovoltaic combining inverter, and it places between inversion output and the electrical network, and purpose is when fault takes place, and effectively breaks off being connected of inverter system and electrical network, improves the security and the reliability of system.Relay has adopted the mode of 2 one group series redundancy, even that is: a relay has been broken, the another one relay also can make inverter effectively cut off electrical network.
Reliability (effectively closed and disconnected) in order to guarantee relay can effectively cut off electrical network to guarantee inverter, and the detection of relay is particularly important.
The utility model content
The purpose of the utility model is, a kind of single-phase photovoltaic DC-to-AC converter relay failure detector is provided.It can adopt the means of external detection to realize the purpose of photovoltaic DC-to-AC converter relay fault detect under broken situation of changing inverter structure, and detects more conveniently, and the result is more accurate.
The technical scheme of the utility model:
A kind of single-phase photovoltaic DC-to-AC converter relay failure detector; Be included in first voltage acquisition module of cross-over connection between live wire and the zero line between relay group and the photovoltaic DC-to-AC converter inverting output terminal; And second voltage acquisition module of cross-over connection between live wire between relay group and the electrical network and zero line, first voltage acquisition module and second voltage acquisition module) link to each other with processing unit.
Compared with prior art, the utility model only needs on the outside live wire of relay group and zero line, to carry out wiring detection voltage can realize the detection to the relay fault, detects more conveniently, can make fault judgement more accurate.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the relay status synoptic diagram of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described, but not as the foundation to the utility model restriction.
Embodiment.
A kind of single-phase photovoltaic DC-to-AC converter relay failure detector; As shown in Figure 1; Be included in first voltage acquisition module 4 of cross-over connection between live wire and the zero line between relay group 2 and the photovoltaic DC-to-AC converter inverting output terminal 1; And second voltage acquisition module, 5, the first voltage acquisition modules 4 of cross-over connection link to each other with processing unit 6 with second voltage acquisition module 5 between live wire between relay group 2 and the electrical network 3 and zero line.
Principle of work: when each relay continuously changes open and-shut mode in the relay group between photovoltaic DC-to-AC converter inverting output terminal and electrical network; Voltage between live wire between the relay group of sampling respectively and the photovoltaic DC-to-AC converter inverting output terminal and zero line; And voltage between live wire between relay group and the electrical network and zero line, judged whether that through the voltage that relatively collects relay breaks down.The relay group comprises that upward relay S1 and S3, the zero line (N) of serial connection are gone up relay S2 and the S4 that is connected in series to live wire (L); Voltage U 2 between live wire between detection relay group and the photovoltaic DC-to-AC converter inverting output terminal and zero line; And voltage U 1 between live wire between relay group and the electrical network and zero line, whether the voltage U 1 under each state of comparator relay group draws with U2 has relay to break down.Said each state of relay group is divided into a, b, c, d, e, f, g, h and nine continuous variable condition of i; State a is that relay S1, S2, S3 and S4 all break off; State b closes for 3 relays wherein, and state c, d, e, f, g and h are the state that on the basis of preceding state, only changes one of them relay, and state i all closes for all relays; As shown in Figure 2, each state is driven by PWM.
Under state b, d, f and h:
is during greater than a threshold value; And under state i; Only at
during less than a threshold value, the relay group is the non-fault relay; N is the voltage sample quantity in every 20ms.
Claims (1)
1. single-phase photovoltaic DC-to-AC converter relay failure detector; It is characterized in that: first voltage acquisition module (4) that is included in cross-over connection between live wire and the zero line between relay group (2) and the photovoltaic DC-to-AC converter inverting output terminal (1); And second voltage acquisition module (5) of cross-over connection between live wire between relay group (2) and the electrical network (3) and zero line, first voltage acquisition module (4) links to each other with processing unit (6) with second voltage acquisition module (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201809024U CN202522679U (en) | 2012-04-24 | 2012-04-24 | Single-phase photovoltaic inverter relay failure detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201809024U CN202522679U (en) | 2012-04-24 | 2012-04-24 | Single-phase photovoltaic inverter relay failure detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202522679U true CN202522679U (en) | 2012-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201809024U Expired - Lifetime CN202522679U (en) | 2012-04-24 | 2012-04-24 | Single-phase photovoltaic inverter relay failure detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202522679U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628925A (en) * | 2012-04-24 | 2012-08-08 | 杭州浙大桑尼能源科技有限公司 | Method and device for detecting faults of relays of photovoltaic inverter |
| CN112433149A (en) * | 2020-11-25 | 2021-03-02 | 浙江艾罗网络能源技术股份有限公司 | Single-phase photovoltaic grid-connected inverter relay failure detection device and method |
-
2012
- 2012-04-24 CN CN2012201809024U patent/CN202522679U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628925A (en) * | 2012-04-24 | 2012-08-08 | 杭州浙大桑尼能源科技有限公司 | Method and device for detecting faults of relays of photovoltaic inverter |
| CN112433149A (en) * | 2020-11-25 | 2021-03-02 | 浙江艾罗网络能源技术股份有限公司 | Single-phase photovoltaic grid-connected inverter relay failure detection device and method |
| CN112433149B (en) * | 2020-11-25 | 2023-08-15 | 浙江艾罗网络能源技术股份有限公司 | Relay failure detection device and method for single-phase photovoltaic grid-connected inverter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU SUNNY ENERGY SCIENCE AND TECHNOLOGY CO., Free format text: FORMER NAME: HANGZHOU ZHEDA SANGNI ENERGY TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Hangzhou City, Zhejiang province 310000 Tonglu County Economic Development Zone Tonglu Shi Chu Road No. 288 Patentee after: HANGZHOU SUNNY ENERGY SCIENCE AND TECHNOLOGY CO., LTD. Address before: 310000, room 4, building 368, six and 4167, Binjiang District, Zhejiang, Hangzhou Patentee before: Zhejiang University Energy Science and Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU SUNNYGAIWEIFUZHURENNENGYUANJUJUZHANG-126. Free format text: FORMER NAME: HANGZHOU SUNNY ENERGY SCIENCE AND TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Tonglu County, Hangzhou Economic Development Zone, Zhejiang province 311500 City Chu Road No. 288 Patentee after: Hangzhou Sani's energy science and technology limited company Address before: Hangzhou City, Zhejiang province 310000 Tonglu County Economic Development Zone Tonglu Shi Chu Road No. 288 Patentee before: HANGZHOU SUNNY ENERGY SCIENCE AND TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181227 Address after: 311500 No. 288 Shizhu Road, Tonglu Economic Development Zone, Hangzhou City, Zhejiang Province Patentee after: Zhejiang elong network energy technology Co. Ltd Address before: 311500 No. 288 Shizhu Road, Tonglu County Economic Development Zone, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Sani's energy science and technology limited company |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 311500 No. 288 Shizhu Road, Tonglu County Economic Development Zone, Hangzhou City, Zhejiang Province Patentee after: Zhejiang arrow network energy technology Co.,Ltd. Address before: 311500 No. 288 Shizhu Road, Tonglu Economic Development Zone, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG SOLAX NETWORK ENERGY TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |