CN101931215B - Wind, light and electricity integrated system and over-voltage protection method of rectifier thereof - Google Patents
Wind, light and electricity integrated system and over-voltage protection method of rectifier thereof Download PDFInfo
- Publication number
- CN101931215B CN101931215B CN 201010147981 CN201010147981A CN101931215B CN 101931215 B CN101931215 B CN 101931215B CN 201010147981 CN201010147981 CN 201010147981 CN 201010147981 A CN201010147981 A CN 201010147981A CN 101931215 B CN101931215 B CN 101931215B
- Authority
- CN
- China
- Prior art keywords
- rectifier
- voltage
- wind
- over
- threshold value
- 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.)
- Active
Links
Images
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The invention relates to a wind, light and electricity integrated system, comprising a wind energy and solar energy inputting system, an AC power distribution unit, a system monitoring unit, a rectifier and a DC bus line; a controlled element connected with the system monitoring unit is installed between the rectifier and the DC bus line; the system monitoring unit samples the voltage of the DC bus line; the controlled element is disconnected when the voltage is lifted to the preset motion threshold of over-voltage separation of the rectifier; and the controlled element is connected when the voltage drops to the preset returning threshold of over-voltage separation of the rectifier. The invention further correspondingly provides an over-voltage protection method of a rectifier of the wind, light and electricity integrated system. The invention avoids the condition that the rectifier can not return after locked due to over-voltage protection, thereby effectively increasing the reliability of constant DC power supply of the system.
Description
Technical field
The present invention relates to Wind, light and electricity integrated system, relate in particular to the improvement of the rectifier DC over-voltage protecting function of Wind, light and electricity integrated system.
Background technology
See also Fig. 1, be the schematic diagram of the integrated DC power system of a kind of wind-light-electricity.As shown in Figure 1, at present Wind, light and electricity integrated system mainly comprises for receiving and converting wind energy and luminous energy and export wind energy and the solar energy input system 1 of dc bus 3 to, also comprise the Alternating Current Unit 4 that is connected to dc bus 3 by rectifier 5, this system also comprises the system monitoring unit 2 for monitoring rectifier 5 and wind energy and solar energy input system 1.In the integrated DC power system of this wind-light-electricity, for the fault that prevents rectifier 5 causes too high voltages from dc bus 3 supply loads, rectifier 5 self is with the DC over-voltage protection function.But the DC over-voltage protection function that carries of rectifier 5 only can be closed rectifier 5 when rectifier 5 is sensed overtension, and can not automatically start rectifier 5 work when circuit recovers.If in circuit, slight fluctuation occurs in voltage, make voltage higher than the action threshold value of rectifier self DC over-voltage protection, rectifier 5 cuts out because of overvoltage protection.Therefore; if this moment, voltage recovered normally, and rectifier 5 can not restart, and the namely misoperation of this DC over-voltage protection causes rectifier 5 by locked and do not export; cause the interchange input of system also to deactivate, the power supply reliability of system is descended.
Summary of the invention
The technical problem to be solved in the present invention is; for after above-mentioned rectifier self overvoltage protection of the integrated DC power system of existing wind-light-electricity by locked and non-return defective, a kind of Wind, light and electricity integrated system and over-voltage protection method of rectifier thereof with rectifier over-voltage breaking function is provided.
The technical solution adopted for the present invention to solve the technical problems is: but the Wind, light and electricity integrated system of the rectifier over-voltage breaking of a kind of auto-returned of structure; when the DC over-voltage protection of rectifier not yet moves, rectifier and the scene input that easily produces too high voltages are disconnected, avoid the DC over-voltage protection of rectifier self.
First aspect of the present invention, a kind of Wind, light and electricity integrated system is provided, comprise wind energy and solar energy input system, Alternating Current Unit, system monitoring unit and rectifier and dc bus, described wind energy is connected with described dc bus with the output of solar energy input system, described Alternating Current Unit is connected to described dc bus by rectifier, and described system monitoring unit is connected with the solar energy input system with wind energy with described rectifier;
Be provided with the controlled member that is connected to described system monitoring unit between described rectifier and described dc bus, described system monitoring unit is connected to the magnitude of voltage of described dc bus and the described dc bus of sampling;
Described system monitoring unit is used for when the voltage of described dc bus rises to the deliberate action threshold value of rectifier over-voltage breaking, controls described controlled member and disconnects; Perhaps, when the voltage drop of described dc bus returns to threshold value to rectifier over-voltage breaking default, control described controlled member closed, describedly defaultly return to threshold value lower than the deliberate action threshold value.
In Wind, light and electricity integrated system of the present invention, the deliberate action threshold value of the rectifier over-voltage breaking of described system monitoring unit is lower than the action threshold value of rectifier self DC over-voltage protection.
In Wind, light and electricity integrated system of the present invention, described wind energy and solar energy input system comprise the wind energy input power supply unit that receives the wind energy input, the photovoltaic input power supply unit that receives the photovoltaic input, and the wind energy that is connected with both outputs and solar energy Input Control Element, described wind energy and solar energy Input Control Element are connected to described system monitoring unit and the information of wind energy and solar energy input system is sent to described system monitoring unit realizes that the integral body of system controls.
In Wind, light and electricity integrated system of the present invention, described system also comprises the temperature conditioning unit for the control system temperature, and described temperature conditioning unit is connected with described system monitoring unit and by described system monitoring unit controls.
In Wind, light and electricity integrated system of the present invention, described controlled member is contactor.
In Wind, light and electricity integrated system of the present invention, described controlled member is switching tube, and described switching tube comprises IGBT pipe or metal-oxide-semiconductor.
Second aspect of the present invention provides a kind of over-voltage protection method of rectifier of Wind, light and electricity integrated system, comprises the following steps:
A, the action threshold value of setting the rectifier over-voltage breaking and rectifier over-voltage breaking return to threshold value, and defaultly return to threshold value lower than the deliberate action threshold value;
B, obtain and judge the voltage of Wind, light and electricity integrated system dc bus, when the voltage of described dc bus rises to the deliberate action threshold value of described rectifier over-voltage breaking, disconnect being connected between dc bus and rectifier; Or DC bus-bar voltage drop to described rectifier over-voltage breaking default when returning to threshold value, recover being connected between dc bus and rectifier.
In over-voltage protection method of rectifier of the present invention, the deliberate action threshold value of the rectifier over-voltage breaking of setting in described steps A is lower than the action threshold value of rectifier self DC over-voltage protection.
Implement Wind, light and electricity integrated system of the present invention and over-voltage protection method of rectifier thereof, have following beneficial effect: the present invention is by arranging controlled member between rectifier and dc bus, and by unified control the in system monitoring unit, can make rectifier first break away from the overvoltage source before rectifier self DC over-voltage protection, and when the direct voltage of rectifier is relatively low and system be connected; Avoided thus after rectifier self overvoltage protection effectively having been improved the reliability of system by locked and non-return situation.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in accompanying drawing:
Fig. 1 is the schematic diagram of the integrated DC power system of existing a kind of wind-light-electricity;
Fig. 2 is the schematic diagram of Wind, light and electricity integrated system in the preferred embodiment of the present invention;
Fig. 3 is the over-voltage protection method of rectifier flow chart of Wind, light and electricity integrated system in the preferred embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.
See also Fig. 2, be the schematic diagram of Wind, light and electricity integrated system in the preferred embodiment of the present invention.As shown in Figure 2, Wind, light and electricity integrated system provided by the invention mainly comprises wind energy and solar energy input system 10, system monitoring unit 20, dc bus 30, Alternating Current Unit 40 and rectifier 50.Wherein, wind energy and solar energy input system 10 are used for receiving and converting wind energy and luminous energy, and export it to dc bus 30.Alternating Current Unit 40 receives and exchanges input and by rectifier 50, interchange be converted to direct current, and exports dc bus 30 to.And system monitoring unit 20 is connected with solar energy input system 10 and rectifier 50 with wind energy, be used for monitoring both to carry out basic power-supply system operation.
The present invention is in order to realize the overvoltage protection to rectifier 50, is provided with the controlled member 60 that is connected to system monitoring unit 20 between rectifier 50 and dc bus 30.Simultaneously, system monitoring unit 20 is connected with dc bus 30, and the magnitude of voltage of sampling dc bus 30 compares judgement with default threshold value.In the present invention, mainly be provided with two important threshold values, be the deliberate action threshold value of rectifier over-voltage breaking and the default threshold value of returning of rectifier over-voltage breaking, represent respectively rectifier need to break away from dc bus 30 action magnitude of voltage be connected after the magnitude of voltage that again recover to connect.Default return to threshold value should be lower than the action threshold value.Therefore, system monitoring unit 20 is used for rising to the deliberate action threshold value of rectifier over-voltage breaking at the voltage that monitors dc bus 30, and (the present embodiment is take the DC power system of 48Vdc as example, its action threshold value default setting is 58.0V) time, control controlled member 60 disconnections, thereby realize the disengaging between rectifier 50 and dc bus 30.When dc bus 30 voltage drops to rectifier 50 over-voltage breakings default returned to threshold value (take the DC power system of 48Vdc as example, it returns to the threshold value default setting is 56.4V equally), this controlled member 60 recovered to connect.
It should be noted that the deliberate action threshold value of the rectifier over-voltage breaking of setting in the present invention should be starkly lower than the action threshold value of rectifier self DC over-voltage protection.When like this, system can not yet move at the DC over-voltage protection of rectifier 50 self, rectifier 50 and the scene input that easily produces too high voltages are disconnected.Therefore; although honourable input can cause system's dc bus 30 overvoltage in short-term; but rectifier 50 this moment over-voltage breaking; the DC over-voltage protection of rectifier 50 self can not occur, and controlled member 60 disconnects the input that has reduced system and also can shorten system's dc bus 30 superpotential time in short-term.
In addition, in embodiment provided by the invention, wind energy and solar energy input system 10 further can comprise wind energy input power supply unit 11, photovoltaic input power supply unit 12 and wind energy and solar energy Input Control Element 13.This wind energy and solar energy Input Control Element 13 are connected to system monitoring unit 20, and the information of wind energy and solar energy input system 10 is sent to described system monitoring unit 20, realize that the integral body of system controls thereby be convenient to system monitoring unit 20, as effectively controlling the output of wind energy and solar energy Input Control Element 13.Wherein, wind energy is inputted power supply unit 11 and is used for receiving the wind energy input, through arriving dc bus 30 after wind energy and solar energy Input Control Element 13.Equally, photovoltaic is inputted power supply unit 12 and is used for receiving the photovoltaic input, through arriving dc bus 30 after wind energy and solar energy Input Control Element 13.In this Wind, light and electricity integrated system, can also comprise temperature conditioning unit 70, this temperature conditioning unit 70 is connected with system monitoring unit 20, and by system monitoring unit 20 control the regulating system temperature.
Controlled member 60 in the present invention can adopt contactor to realize, this contactor also can be called as ROVD (Rectifier Over-Voltage Disconnect, rectifier over-voltage breaking) contactor.This ROVD contactor can be selected the various types of contactors such as any NO well known to those skilled in the art, NC, bistable state.In addition, also can adopt the function that realizes controlled member 60 as alternative ROVD contactors of gate-controlled switch class device such as IGBT pipe or metal-oxide-semiconductors.
See also Fig. 3, be the over-voltage protection method of rectifier flow chart of Wind, light and electricity integrated system in the preferred embodiment of the present invention.The over-voltage protection method of rectifier of Wind, light and electricity integrated system provided by the invention as shown in Figure 3, it is mainly realized by following steps.
At first execution in step A namely sets the threshold value of returning of the action threshold value of rectifier over-voltage breaking and rectifier over-voltage breaking in S1 shown in Figure 3, and default returns to threshold value lower than the action threshold value.In present invention further optimization embodiment, the deliberate action threshold value of the rectifier over-voltage breaking of this setting should be lower than the action threshold value of rectifier self DC over-voltage protection.
Execution in step B subsequently namely obtains and judges the voltage of Wind, light and electricity integrated system dc bus in S2 shown in Figure 3.Then according to the result of judgement, distinguish execution in step S3 and step S4 when meeting the following conditions.
In step S3 shown in Figure 3, when the voltage of described dc bus rises to the deliberate action threshold value of described rectifier over-voltage breaking, disconnect being connected between dc bus and rectifier.
In step S4 shown in Figure 3, DC bus-bar voltage drop to described rectifier over-voltage breaking default when returning to threshold value, recover being connected between dc bus and rectifier.
In sum, the present invention is by arranging controlled member between rectifier and dc bus, and control by the system monitoring unit is unified, can make rectifier first break away from the overvoltage source before rectifier self DC over-voltage protection, and when the direct voltage of rectifier is relatively low and system be connected; Avoided thus after rectifier self overvoltage protection effectively having been improved the reliability of system by locked and non-return situation.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the scope of the invention, can carry out various variations and be equal to replacement.In addition, for adapting to specific occasion or the material of the technology of the present invention, can carry out many modifications and not break away from its protection range the present invention.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises that all drop into the embodiment of claim protection range.
Claims (6)
1. Wind, light and electricity integrated system, comprise wind energy and solar energy input system, Alternating Current Unit, system monitoring unit and rectifier and dc bus, described wind energy is connected with described dc bus with the output of solar energy input system, described Alternating Current Unit is connected to described dc bus by rectifier, and described system monitoring unit is connected with the solar energy input system with wind energy with described rectifier; It is characterized in that,
Be provided with the controlled member that is connected to described system monitoring unit between described rectifier and described dc bus, described system monitoring unit is connected to the magnitude of voltage of described dc bus and the described dc bus of sampling;
Described system monitoring unit is used for when the voltage of described dc bus rises to the deliberate action threshold value of rectifier over-voltage breaking, controls described controlled member and disconnects; And; when the voltage drop of described dc bus returns to threshold value to rectifier over-voltage breaking default; control described controlled member closed; describedly default return to threshold value lower than the deliberate action threshold value, and the deliberate action threshold value of the rectifier over-voltage breaking of described system monitoring unit is lower than the action threshold value of rectifier self DC over-voltage protection.
2. Wind, light and electricity integrated system according to claim 1, it is characterized in that, described wind energy and solar energy input system comprise the wind energy input power supply unit that receives the wind energy input, the photovoltaic input power supply unit that receives the photovoltaic input, and the wind energy that is connected with both outputs and solar energy Input Control Element, described wind energy and solar energy Input Control Element are connected to described system monitoring unit and the information of wind energy and solar energy input system is sent to described system monitoring unit realizes that the integral body of system controls.
3. Wind, light and electricity integrated system according to claim 1, is characterized in that, described system also comprises the temperature conditioning unit for the control system temperature, and described temperature conditioning unit is connected with described system monitoring unit and by described system monitoring unit controls.
4. Wind, light and electricity integrated system according to claim 1, is characterized in that, described controlled member is contactor.
5. Wind, light and electricity integrated system according to claim 1, is characterized in that, described controlled member is switching tube, and described switching tube comprises IGBT pipe or metal-oxide-semiconductor.
6. the over-voltage protection method of rectifier of a Wind, light and electricity integrated system, is characterized in that, comprises the following steps:
A, the deliberate action threshold value of setting the rectifier over-voltage breaking and the default threshold value of returning of rectifier over-voltage breaking, and preset and return to threshold value lower than the deliberate action threshold value, the deliberate action threshold value of the rectifier over-voltage breaking of setting is lower than the action threshold value of rectifier self DC over-voltage protection;
B, obtain and judge the voltage of Wind, light and electricity integrated system dc bus, when the voltage of described dc bus rises to the deliberate action threshold value of described rectifier over-voltage breaking, disconnect being connected between dc bus and rectifier; And DC bus-bar voltage drop to described rectifier over-voltage breaking default when returning to threshold value, recover being connected between dc bus and rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010147981 CN101931215B (en) | 2010-04-16 | 2010-04-16 | Wind, light and electricity integrated system and over-voltage protection method of rectifier thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010147981 CN101931215B (en) | 2010-04-16 | 2010-04-16 | Wind, light and electricity integrated system and over-voltage protection method of rectifier thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101931215A CN101931215A (en) | 2010-12-29 |
| CN101931215B true CN101931215B (en) | 2013-06-05 |
Family
ID=43370228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010147981 Active CN101931215B (en) | 2010-04-16 | 2010-04-16 | Wind, light and electricity integrated system and over-voltage protection method of rectifier thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101931215B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450058B (en) | 2014-06-20 | 2018-03-16 | 华为技术有限公司 | A kind of inverter and its control device, control method and inverter system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2328122Y (en) * | 1998-05-29 | 1999-07-07 | 王渊 | Special converter for wind and solar power generation |
| CN101309017A (en) * | 2008-07-11 | 2008-11-19 | 中国科学院电工研究所 | Wind power and photovoltaic power complementary power supply system based on mixed energy accumulation of super capacitor accumulator |
| CN101685986A (en) * | 2009-05-21 | 2010-03-31 | 复旦大学 | Wind and light complementary power generation system using super capacitor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006002698A1 (en) * | 2006-01-19 | 2007-08-02 | Conergy Ag | Inverter circuit for mains supply and for mains-independent operation |
-
2010
- 2010-04-16 CN CN 201010147981 patent/CN101931215B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2328122Y (en) * | 1998-05-29 | 1999-07-07 | 王渊 | Special converter for wind and solar power generation |
| CN101309017A (en) * | 2008-07-11 | 2008-11-19 | 中国科学院电工研究所 | Wind power and photovoltaic power complementary power supply system based on mixed energy accumulation of super capacitor accumulator |
| CN101685986A (en) * | 2009-05-21 | 2010-03-31 | 复旦大学 | Wind and light complementary power generation system using super capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101931215A (en) | 2010-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109066798B (en) | Shutoff device of photovoltaic module | |
| CN203056953U (en) | Driver and bus capacitor discharge circuit thereof | |
| CN104868586B (en) | Automatic switching power supply circuit for double-way power supply | |
| CN202888791U (en) | Load controller based on zero-cross starting overvoltage protection | |
| CN101237137A (en) | Over voltage and under-voltage device | |
| CN103166168A (en) | High-voltage direct current solid state power controller | |
| CN103545911A (en) | Uninterrupted power system capable of conducting double-input intelligent power supply | |
| CN104426236B (en) | Power supply supply converting system and control method thereof | |
| US10523012B2 (en) | Safety device for photovoltaic installations | |
| CN208874344U (en) | Main power source and backup power source switching circuit and switching device | |
| CN103390879A (en) | Alternating current power supply input high voltage protection device | |
| CN113964863A (en) | Series photovoltaic system capable of automatically achieving module level turn-off | |
| CN101752840A (en) | Numerical control power supply overvoltage protection circuit | |
| CN201994717U (en) | Control device for supplying power to breaker control units | |
| CN102148529A (en) | Control device and control method thereof for intelligently supplying power to circuit breaker control unit | |
| CN107959279B (en) | A kind of solar battery array soft-start control system and its control method | |
| CN101931215B (en) | Wind, light and electricity integrated system and over-voltage protection method of rectifier thereof | |
| CN106300462A (en) | Electricity circuit under battery | |
| CN2523098Y (en) | Power source module | |
| CN112072741A (en) | One-key starting system and method for household energy storage system | |
| CN203406776U (en) | DC power supply | |
| CN103986137B (en) | Novel self fault recovery system of multifunctional current limiter and control method of novel self fault recovery system | |
| CN203326551U (en) | Magnetic latching non-stick over-voltage and under-voltage protector | |
| CN102832798B (en) | One powers on buffer control circuit and control method thereof | |
| CN103259422A (en) | Power supply device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park B2 building 1-4 floor, building 6-10 Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191202 Address after: 056900 Fangtou Village, Yangqiao Town, Daming County, Handan City, Hebei Province Patentee after: Jia Xiaoli Address before: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park B2 building 1-4 floor, building 6-10 Patentee before: Vitamin Technology Co., Ltd. |