CN103701090A - Software control method of defending load end short circuit of photovoltaic energy storage inverse control all-in-one machine - Google Patents
Software control method of defending load end short circuit of photovoltaic energy storage inverse control all-in-one machine Download PDFInfo
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- CN103701090A CN103701090A CN201410009001.2A CN201410009001A CN103701090A CN 103701090 A CN103701090 A CN 103701090A CN 201410009001 A CN201410009001 A CN 201410009001A CN 103701090 A CN103701090 A CN 103701090A
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Abstract
The invention discloses a software control method of defending a load end short circuit of a photovoltaic energy storage inverse control all-in-one machine. The method comprises the following steps that the machine is manually started; open loop low voltage output is performed; a software control unit controls the machine to output an alternating current voltage with an effective value of 16 V-36 V in an open loop form; a short circuit state is judged; after the alternating current voltage is output, if a target voltage cannot be obtained, and output current is very large, the machine is stopped immediately; if a certain voltage is obtained, larger current appears within 5 seconds, the short circuit state is judged, or else, the software control unit controls the photovoltaic energy storage inverse control all-in-one machine to output an alternating current voltage with an effective value of 220 V in a closed loop form. As the software control method of defending the load end short circuit of the photovoltaic energy storage inverse control all-in-one machine is adopted, after the machine is manually started, the short circuit detection is performed in the open loop low voltage output mode; under the premise of no impact current, whether the output is in the short circuit state can be detected, an inverter is stopped, a caution is provided, and thus the service life of equipment can be prolonged.
Description
Technical field
The present invention relates to a kind of control of photovoltaic DC-to-AC converter, specifically a kind of software control method of protecting the short circuit of the contrary control of photovoltaic energy storage all-in-one load end.
Background technology
It is CN202872349U that State Intellectual Property Office discloses publication number on April 10th, 2013, and patent name is the utility model patent that utilizes the Circuits System of IGBT temperature control inverter power output derate.
The function of the contrary control of photovoltaic energy storage all-in-one: the one, by being converted to compared with low dc voltage of solar panel output, energy-storage units is charged; The 2nd, by the power conversion of energy-storage units, be the AC signal of normal voltage, frequency, in order to various electric equipments are powered.
Traditional from net inverter after output short-circuit protection, before fault is not got rid of, still according to normal mode, start trial, rely on the hardware protection of impact electric current to go to stop inversion output and warning; So repeatedly, will cause great impact to switching device, reduce the useful life of inverter, even damage our inverter.
But in practice process, electric equipment occurs that the situation of short circuit is difficult to avoid, and how, the in the situation that of equipment short circuit, neither damages power supply unit, again can be in time and user interactions and then discharge fault, be the problem that must solve from the contrary control of net type photovoltaic energy storage all-in-one.
Summary of the invention
The object of the invention is to solve above-mentioned technical deficiency part, a kind of contrary software control method of controlling the short circuit of all-in-one load end of protection photovoltaic energy storage is provided.
For achieving the above object, the technical solution adopted in the present invention is:
The software control method of the contrary control of protection photovoltaic energy storage all-in-one load end short circuit, comprises the following steps:
A, manually start: after shutdown, the contrary control of manually opened photovoltaic energy storage all-in-one;
B, open loop low pressure output: the contrary control of photovoltaic energy storage all-in-one powers on first, and the output of open loop low pressure is carried out in software control unit, i.e. the contrary control of software control unit controls photovoltaic energy storage all-in-one be take the alternating voltage that open loop formal output effective value is 16V ~ 36V;
C, short circuit judge: after alternating voltage output, if cannot obtain target voltage, and output current is while being greater than the current threshold of setting, and software control unit is judged to be short-circuit condition, and hard stop is also warned user and needed unshorting fault; If obtain certain voltage, start timer;
D, short circuit time delay judge: if timer has larger electric current to occur within the time of setting, when output current is greater than the current threshold of setting, software control unit is judged to be short-circuit condition, and hard stop is also warned user and needed unshorting fault; Timer all occurs without larger electric current within the time of setting, and thinks that output is abnormal without short circuit, and software control unit controls photovoltaic energy storage is contrary to be controlled all-in-one and take closed loop and export the alternating voltage that effective value is 220V.
In described step B, the contrary control of photovoltaic energy storage all-in-one be take the alternating voltage that open loop formal output effective value is 30V.
In described step C and step D, the current threshold of setting is 10A.
In described step D, the time of described setting is 5 seconds.
Beneficial effect of the present invention: owing to adopting the software control method of the contrary control of above-mentioned protection photovoltaic energy storage all-in-one load end short circuit, with after hand starting, first by the mode of open loop low pressure output, carry out short-circuit detecting, can be under the prerequisite of non-impact current, whether output detected in short-circuit condition, and then stop inverter warning, thereby extended the useful life of equipment.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Fig. 1 is the flow chart of the software control method of the contrary control of protection photovoltaic energy storage all-in-one load end short circuit.
Embodiment
As shown in Figure 1, the software control method of the contrary control of protection photovoltaic energy storage all-in-one load end short circuit, comprises the following steps:
A, manually start: after shutdown, the contrary control of manually opened photovoltaic energy storage all-in-one;
B, open loop low pressure output: the contrary control of photovoltaic energy storage all-in-one powers on first, and the output of open loop low pressure is carried out in software control unit, i.e. the contrary control of software control unit controls photovoltaic energy storage all-in-one be take the alternating voltage that open loop formal output effective value is 30V;
C, short circuit judge: after alternating voltage output, if cannot obtain target voltage, and output current is while being greater than 10A, and software control unit is judged to be short-circuit condition, and hard stop is also warned user and needed unshorting fault; If obtain certain voltage, start timer;
D, short circuit time delay judge: if timer had larger electric current to occur in 5 seconds, when output current is greater than 10A, software control unit is judged to be short-circuit condition, and hard stop is also warned user and needed unshorting fault; Timer all occurred without larger electric current in 5 seconds, thought that output is abnormal without short circuit, and the contrary control of software control unit controls photovoltaic energy storage all-in-one be take the alternating voltage that closed loop output effective value is 220V.
The above is the preferred embodiment of the present invention; certainly can not limit with this interest field of the present invention; should be understood that; for those skilled in the art; technical scheme of the present invention is modified or is equal to replacement, do not depart from the protection range of technical solution of the present invention.
Claims (4)
1. a software control method of protecting the short circuit of the contrary control of photovoltaic energy storage all-in-one load end, is characterized in that: comprise the following steps:
A, manually start: after shutdown, the contrary control of manually opened photovoltaic energy storage all-in-one; B, open loop low pressure output: the contrary control of photovoltaic energy storage all-in-one powers on first, and the output of open loop low pressure is carried out in software control unit, i.e. the contrary control of software control unit controls photovoltaic energy storage all-in-one be take the alternating voltage that open loop formal output effective value is 16V ~ 36V; C, short circuit judge: after alternating voltage output, if cannot obtain target voltage, and output current is while being greater than the current threshold of setting, and software control unit is judged to be short-circuit condition, and hard stop is also warned user and needed unshorting fault; If obtain certain voltage, start timer; D, short circuit time delay judge: if timer has larger electric current to occur within the time of setting, when output current is greater than the current threshold of setting, software control unit is judged to be short-circuit condition, and hard stop is also warned user and needed unshorting fault; Timer all occurs without larger electric current within the time of setting, and thinks that output is abnormal without short circuit, and software control unit controls photovoltaic energy storage is contrary to be controlled all-in-one and take closed loop and export the alternating voltage that effective value is 220V.
2. the software control method of the contrary control of protection photovoltaic energy storage according to claim 1 all-in-one load end short circuit, is characterized in that: in described step B, the contrary control of photovoltaic energy storage all-in-one be take the alternating voltage that open loop formal output effective value is 30V.
3. the software control method of the contrary control of protection photovoltaic energy storage according to claim 2 all-in-one load end short circuit, is characterized in that: in described step C and step D, the current threshold of setting is 10A.
4. the software control method of the contrary control of protection photovoltaic energy storage according to claim 1 all-in-one load end short circuit, is characterized in that: in described step D, the time of described setting is 5 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009001.2A CN103701090B (en) | 2014-01-09 | 2014-01-09 | The software control method of protection photovoltaic energy storage inverse control all-in-one machine load end short circuit |
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| CN201410009001.2A CN103701090B (en) | 2014-01-09 | 2014-01-09 | The software control method of protection photovoltaic energy storage inverse control all-in-one machine load end short circuit |
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| CN103701090A true CN103701090A (en) | 2014-04-02 |
| CN103701090B CN103701090B (en) | 2016-09-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6031736A (en) * | 1995-07-26 | 2000-02-29 | Canon Kabushiki Kaisha | Control apparatus of inverter and power generation system using such control apparatus |
| CN201194335Y (en) * | 2008-03-28 | 2009-02-11 | 张海波 | Solar photovoltaic power generation controller |
| CN201690268U (en) * | 2010-06-07 | 2010-12-29 | 哈尔滨卓尔科技有限公司 | Wind-light complementary control inverter for cool house |
| CN102395894A (en) * | 2009-04-17 | 2012-03-28 | 原子能及能源替代委员会 | Method of diagnosing the failure of a photovoltaiic generator |
| CN202872349U (en) * | 2012-09-27 | 2013-04-10 | 北京京仪绿能电力系统工程有限公司 | Circuit system using IGBT temperature to control derating of output power of inverter |
-
2014
- 2014-01-09 CN CN201410009001.2A patent/CN103701090B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6031736A (en) * | 1995-07-26 | 2000-02-29 | Canon Kabushiki Kaisha | Control apparatus of inverter and power generation system using such control apparatus |
| CN201194335Y (en) * | 2008-03-28 | 2009-02-11 | 张海波 | Solar photovoltaic power generation controller |
| CN102395894A (en) * | 2009-04-17 | 2012-03-28 | 原子能及能源替代委员会 | Method of diagnosing the failure of a photovoltaiic generator |
| CN201690268U (en) * | 2010-06-07 | 2010-12-29 | 哈尔滨卓尔科技有限公司 | Wind-light complementary control inverter for cool house |
| CN202872349U (en) * | 2012-09-27 | 2013-04-10 | 北京京仪绿能电力系统工程有限公司 | Circuit system using IGBT temperature to control derating of output power of inverter |
Non-Patent Citations (1)
| Title |
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| 任贤等: "基于DSP的大功率三相逆变电源设计与实现", 《装备制造技术》 * |
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Effective date of registration: 20150521 Address after: 516005 Dongjiang Industrial Zone, Shuikou subdistrict, Huicheng District, Guangdong, Huizhou Applicant after: HUIZHOU TEN SOURCES SOLAR ELECTRICITY LIMITED Address before: 516005 Dongjiang Industrial Zone, Shuikou subdistrict, Huicheng District, Guangdong, Huizhou Applicant before: HUIZHOU TEN SOURCES SOLAR ELECTRICITY LIMITED Applicant before: Ten Pao Electronics (Huizhou) Co., Ltd. |
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