CN101969274B - Bus voltage stabilization control device - Google Patents
Bus voltage stabilization control device Download PDFInfo
- Publication number
- CN101969274B CN101969274B CN 201010288661 CN201010288661A CN101969274B CN 101969274 B CN101969274 B CN 101969274B CN 201010288661 CN201010288661 CN 201010288661 CN 201010288661 A CN201010288661 A CN 201010288661A CN 101969274 B CN101969274 B CN 101969274B
- Authority
- CN
- China
- Prior art keywords
- bus
- voltage
- duty ratio
- value
- pulse width
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a bus voltage stabilization control device. Firstly, high-end bus voltage and low-end bus voltage are respectively sampled by two bus voltage sensors; then, the sampling values are respectively transferred into a high-end bus voltage controller and a low-end bus voltage controller and are compared with the expected values; when the voltage sampling values are less than the expected voltage values of the buses, the duty ratio of pulse width modulation signals is correspondingly reduced so that the output power of a half-bridge inverter circuit is reduced, and the stored energy of a bus capacitor is increased, thus the voltage sampling values are increased until the voltage sampling values are equal to the expected voltage values of the buses; and the reverse is also true. In the invention, by controlling corresponding output current values by the high-end bus voltage controller and the low-end bus voltage controller, the regulation of the bus voltage is realized to enable the bus voltage to be in a stabilized state. Meanwhile, because the expected voltage values (Uref) of the buses in the high-end bus voltage controller and the low-end bus voltage controller are same, the bus voltage is stabilized, and simultaneously, the balance of the high-end voltage and the low-end voltage of the buses is also realized.
Description
Technical field
The invention belongs to photovoltaic inversion grid connection electricity generation system technical field, more specifically say, relate to a kind of bus voltage stabilization control device that the photovoltaic DC-to-AC converter busbar voltage is controlled.
Background technology
The photovoltaic contravariant generating system is paid close attention to by the many countries in the whole world at present, and photovoltaic DC-to-AC converter has also obtained very large development as the key component of photovoltaic inversion grid connection electricity generation system.Generally, as shown in Figure 1, photovoltaic inversion grid connection electricity generation system all is comprised of solar panel array 1, photovoltaic DC-to-AC converter 2.Wherein, photovoltaic DC-to-AC converter 2 comprises MPPT maximum power point tracking (MPPT) module 201, bus circuit 202, inverter bridge circuit 203 and control circuit 204 parts, and function converts solar energy into electrical energy exactly and Energy transfer is arrived electrical network 3.
Fig. 1 is the basic block diagram of photovoltaic inversion grid connection electricity generation system.The function of solar panel array 1 converts solar energy into electrical energy exactly, MPPT maximum power point tracking (MPPT) module 201 directly links to each other with solar panel array 1, to regulate the operating state of solar panel, solar panel is operated on the maximum power point.Bus circuit 202 links to each other with solar panel array 1 by the booster circuit on the MPPT maximum power point tracking module 201, system begins to carry out Energy Transfer when its busbar voltage is elevated to the value of appointment, and the power delivery that solar panel is transformed is to inverter bridge circuit 203.Inverter bridge circuit 203 is responsible for the direct current that bus circuit 202 transmits is converted to alternating current (normally 50Hz civil power).Control circuit 204 is keys of whole photovoltaic inversion grid connection electricity generation system steady operation, and the realization of maximal power tracing, the balance of busbar voltage are controlled quietly, the tracking of inverter bridge circuital current control all will rely on control circuit 204 to carry out computing and scheduling.Photovoltaic DC-to-AC converter 2 uses half-bridge circuit as the inversion main body usually, therefore usually exists busbar voltage unstable, the unbalanced problem of height terminal voltage.Traditional photovoltaic DC-to-AC converter has also proposed the control method of multiple realization midpoint potential balance, the method that realizes the midpoint potential balance for three-phase inverter mainly contains: midpoint potential Passive Control method, ACTIVE CONTROL method and the ring control method etc. that stagnates, but because the restriction of condition, these control methods are also inapplicable on single-phase photovoltaic DC-to-AC converter.
Be generally used at present the control method of single-phase photovoltaic DC-to-AC converter midpoint potential balance, as described in " a kind of novel half-bridge inverter capacitor voltage equalizing control strategy " of the announcement of electrotechnics journal the 7th phase of the 21st volume in July, 2006, the control of voltage and current double closed-loop instantaneous value, but the control of traditional electric current and voltage dicyclo is not controlled for the electric capacity bias voltage, without any the correction effect, be unfavorable for the operation of system's long-term stability for initial voltage deviation on the dividing potential drop electric capacity; In addition, because the system voltage loop has adopted PI control, therefore be subject to the inhibition of system at the capacitance voltage difference signal of electric current loop input, can not have produced good control effect.
In addition, can the deviation of capacitance voltage be reduced by increasing the dividing potential drop capacitance, also can on dividing potential drop electric capacity, reduce dividing potential drop capacitance voltage deviation by larger power resistor in parallel, but these methods can not thoroughly be eliminated the electric capacity bias voltage, and are all increasing in varying degrees circuit complexity or reducing the efficient of system.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, propose a kind of bus voltage stabilization control device, can make busbar voltage automatically reach stable, eliminate simultaneously the electric capacity bias voltage of bus capacitor.
For achieving the above object, bus voltage stabilization control device of the present invention is characterized in that, comprising:
Two busbar voltage transducers are sampled to the high-end capacitor C 1 of bus of series connection, the voltage at bus low side capacitor C 2 two ends respectively, obtain the high low side capacitance voltage of bus sampled value
Wherein, sample frequency is 100Hz/N, and N is the integer more than or equal to 1;
One high-end busbar voltage controller, it is input as the high-end capacitance voltage sampled value of bus
Be output as the pulse width modulating signal of positive half period power switch pipe switch in the control half-bridge inversion circuit
One low side busbar voltage controller, it is input as bus low side capacitance voltage sampled value
Be output as the pulse width modulating signal of negative half-cycle power switch pipe switch in the control half-bridge inversion circuit
The pulse width modulating signal of high-end busbar voltage controller output
With low side busbar voltage controller output pulse width modulation signal
High-low level opposite, duty ratio K
1With duty ratio K
2Sum equals 1;
At positive half period, duty ratio K
1Greater than duty ratio K
2, at this moment, the inverter output current is mainly provided by the high-end capacitor C 1 of bus; When the high-end capacitance voltage sampled value of bus
Be lower than the bus desired voltage values
Then reduce the pulse width modulating signal of high-end busbar voltage controller output
Duty ratio K
1On the contrary, if the high-end capacitance voltage sampled value of bus
Be higher than bus desired voltage values U
Ref, then increase the duty ratio K of the pulse width modulating signal of high-end busbar voltage controller output
1
At negative half-cycle, duty ratio K
1Less than duty ratio K
2, at this moment, the inverter output current is mainly provided by bus low side capacitor C 2; When bus low side capacitance voltage sampled value
Be lower than bus desired voltage values U
Ref, then reduce the duty ratio K of the pulse width modulating signal of low side busbar voltage controller output
2On the contrary, if the high-end capacitance voltage sampled value of bus
Be higher than bus desired voltage values U
Ref, then increase the pulse width modulating signal that low side busbar voltage controller is exported
Duty ratio K
2
Goal of the invention of the present invention is achieved in that
Bus voltage stabilization control device of the present invention is at first sampled to high and low end busbar voltage respectively by two busbar voltage transducers; Then send into respectively in the high low side busbar voltage controller, compare with desired value, when the voltage sample value is lower than the bus desired voltage values, then reduce the duty ratio of pulse width modulating signal, like this, the half-bridge inversion circuit power output reduces, and the energy storage of bus capacitor will increase, thereby its voltage sample value is raise, until with the bus desired voltage values; On the contrary, if the voltage sample value is higher than the bus desired voltage values, then increase the duty ratio of its pulse width modulating signal, like this, the half-bridge inversion circuit power output increases, and the energy storage of bus capacitor will reduce, thereby its voltage sample value is reduced, until with the bus desired voltage values.In the present invention, by high low side busbar voltage controller the output current value of correspondence is controlled, realized the adjusting to busbar voltage, make it reach stable state.Simultaneously, owing to adopt because the bus desired voltage values U in the high low side busbar voltage controller
RefIdentical, therefore, reach busbar voltage stable in, also realized the balance of bus height terminal voltage.
Beneficial effect of the present invention is: used a kind of novel bus voltage stabilization control device, reduced the voltage ripple of power network impact, improved control efficiency, when appearring in busbar voltage, fluctuation can automatically adjust rapidly, make the high-end and low terminal voltage of bus reach stable and balance, guarantee that accordingly power output equals input power, and then realize stable photovoltaic inversion control.
Description of drawings
The basic block diagram of Fig. 1 photovoltaic inversion grid connection electricity generation system;
Fig. 2 is the theory diagram of a kind of embodiment of bus voltage stabilization control device of the present invention;
Fig. 3 is the schematic diagram of bus circuit shown in Figure 2 and busbar voltage transducer;
Fig. 4 is the control principle drawing of high-end busbar voltage controller shown in Figure 2;
Fig. 5 is bus circuit shown in Figure 2 and half-bridge inversion circuit schematic diagram;
Fig. 6 is half-bridge inversion circuit output voltage waveform shown in Figure 5;
Fig. 7 is half-bridge inversion circuit power output oscillogram shown in Figure 5.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.What need to point out especially is that in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these were described in here and will be left in the basket.
Embodiment
Fig. 2 is bus voltage stabilization control device theory diagram of the present invention.
In the present embodiment, as shown in Figure 2, bus voltage stabilization control device 2041 is arranged in control circuit 204, comprises two busbar voltage transducer S
1, S
2And high low side busbar voltage controller CK
1, CK
2
Two busbar voltage transducer S
1, S
2Sample frequency with 100Hz/N is sampled, and N is the integer more than or equal to 1, obtains the high low side capacitance voltage of bus sampled value
Then export to respectively high low side busbar voltage controller CK
1, CK
2
High low side busbar voltage controller CK
1, CK
2Input be respectively the high low side capacitance voltage of bus sampled value
Be output as the pulse width modulating signal of positive and negative half period power switch pipe switch in the control half-bridge inversion circuit 203
When the high-end capacitance voltage sampled value of bus
Or bus low side capacitance voltage sampled value
Be lower than bus desired voltage values U
Ref, then reduce corresponding pulse width modulating signal
Duty ratio K
1, K
2On the contrary, then increase the duty ratio K of corresponding pulse width modulating signal
1, K
2Like this, half-bridge inversion circuit 203 power outputs increase or reduce, and the energy storage of bus capacitor will reduce or increase, thereby its voltage sample value is reduced or increase, until with the bus desired voltage values, it is reached stablizes and poised state.
Fig. 3 is the schematic diagram of bus circuit shown in Figure 2 and busbar voltage transducer.
In this enforcement, as shown in Figure 2, bus circuit 202 inputs link to each other with MPPT maximum power point tracking module 201, and output directly links to each other with half-bridge inversion circuit 203.Bus circuit 202 is key components of whole system Energy transfer, and its input is direct voltage and the electric current of solar panel array 1 output, and output changes into into and the alternating current of line voltage with the frequency homophase through half-bridge inversion circuit 203.In the ideal case: when busbar voltage reached desired value, photovoltaic inversion grid connection electricity generation system was just started working.
As shown in Figure 3, bus circuit 202 is by the high-end capacitor C of bus that is connected in series on the bus
1, bus low side capacitor C
2Form.U
dBe the global voltage value of bus, when busbar voltage is stablized, bus high-end and the low side balance of voltage, i.e. U
C1=U
C2=U
Ref, power output equals input power.But in the practical work process of half-bridge inversion circuit 203, because capacitor C
1, C
2Not exclusively symmetrical, its leakage current is different, and the impact of the factors such as voltage ripple of power network and input and output Incomplete matching can cause busbar voltage uneven, unsettled phenomenon to occur.
In this enforcement, as shown in Figure 3, two busbar voltage transducer S
1, S
2Sample frequency with 100Hz/N is sampled, and N is the integer more than or equal to 1, obtains the high low side capacitance voltage of bus sampled value
Then export to respectively high low side busbar voltage controller CK
1, CK
2Because busbar voltage is the frequency with 100Hz to fluctuate, and samples the high low side capacitance voltage of bus sampled value with the sample frequency of 100Hz/N
Can adopt on the same phase point, thereby guarantee the accuracy of controlling.
Fig. 4 is the control principle drawing of high-end busbar voltage controller shown in Figure 2.
In this enforcement, as shown in Figure 4, its control principle as shown in Figure 3.U among the figure
RefExpression bus desired voltage values, U
Err1Be bus desired voltage values and actual voltage value, i.e. the high low side capacitance voltage of bus sampled value
Difference, I
Ref1Desired value for grid-connected current.
As shown in Figure 4, high-end busbar voltage controller CK
1Comprise subtracter, PID controller and half-bridge control algolithm device G (S).Its subtracter is with the high-end capacitance voltage sampled value of bus
With bus desired voltage values U
RefCompare, obtain bus desired voltage values U
RefWith high-end capacitance voltage sampled value
Difference U
Err1, then, with difference U
Err1Send in the PID controller, convert the desired value I of grid-connected current to
Ref1, the desired value I of grid-connected current
Ref1Send in the half-bridge control algolithm device and convert pulse width modulating signal to
The switch of the positive half period power switch pipe in the control half-bridge inversion circuit.When the high-end capacitance voltage sampled value of the bus that detects
Be lower than bus desired voltage values U
Ref, the difference U that obtains
Err1For just, like this, the desired value I of the grid-connected current of in the PID controller, exporting
Ref1To reduce, convert pulse width modulating signal in the half-bridge control algolithm device
Duty ratio K
1Also reduce accordingly, the bus circuit power output reduces, the high-end capacitor C of bus
1Energy storage will increase, thereby make its voltage sample value
Raise, until with bus desired voltage values U
RefIn like manner, when the high-end capacitance voltage sampled value of the bus that detects
Be higher than bus desired voltage values U
RefThe time, the difference U that obtains
Err1For negative, like this, the desired value I of the grid-connected current of in the PID controller, exporting
Ref1To increase, convert pulse width modulating signal in the half-bridge control algolithm device
Duty ratio K
1Also increase accordingly, the bus circuit power output increases, the high-end capacitor C of bus
1Energy storage will reduce, thereby make its voltage sample value
Reduce, until with bus desired voltage values U
Ref
In the present embodiment, duty ratio is K
1Pulse width modulating signal
The switch ratio that is used for the positive half period power switch pipe of control half-bridge inversion circuit is to regulate the power output of bus circuit.As shown in Figure 4, G
K(s) be the circuit model of positive half period power switch pipe, IL
1Be actual current value, F () expression grid-connected current is to the transfer function of busbar voltage.
In the present embodiment, adopt the control of electric current and voltage dicyclo, interior ring is exactly G among the figure (S), G
K(s) the grid-connected current feedback control loop of module composition, among the half-bridge control algolithm device G (S), the grid-connected current desired value I of input
Ref1With actual value IL
1Differ, half-bridge control algolithm device G (S) is by the regulating impulse bandwidth modulation signals
Duty ratio is K
1, regulate grid-connected current actual value IL
1Size, make the desired value I with its grid-connected current
Ref1Equate.If the grid-connected current actual value IL of output
1Desired value I less than grid-connected current
Ref1, then half-bridge control algolithm device G (S) increases pulse width modulating signal
Duty ratio is K
1, strengthen positive half period power switch pipe G
K(s) switch ratio increases grid-connected current actual value IL
1, make it reach the desired value I of grid-connected current
Ref1As the same on the contrary.
Outer shroud is the Voltage Feedback control ring, and input is bus desired voltage values U
RefWith the high-end capacitance voltage sampled value of bus
Difference is through PID controller and the actual busbar voltage of current loop control output.Outer shroud, i.e. the course of work of Voltage Feedback control ring and principle, the front is described in detail, does not repeat them here.
Fig. 5 is bus circuit shown in Figure 2 and half-bridge inversion circuit schematic diagram.
L1 is the inductance that is incorporated into the power networks among the figure; C3 is the electric capacity that is incorporated into the power networks; Bus is comprised of with low side capacitor C 1, C2 high-end, and the high low side electric capacity of bus works alone, and when positive half period power switch pipe Q1 was closed, the high-end capacitor C 1 of bus formed the loop with electrical network, the energy that is incorporated into the power networks is provided by capacitor C 1, and the voltage waveform that is incorporated into the power networks is shown in Fig. 6 positive half period; When negative half-cycle power switch pipe Q2 was closed, bus low side capacitor C 2 formed the loop with electrical network, and the energy that is incorporated into the power networks is provided by capacitor C 2, is incorporated into the power networks waveform shown in Fig. 6 negative half-cycle.
The control bus balance of voltage of the present invention stable detailed process be: among the half-bridge control algolithm device G (S), convert pulse width modulating signal to
Duty ratio K
1Also increase accordingly.When high-end capacitor C 1 work of bus, line voltage and grid-connected current homophase and all for just, power output is shown in the left half period of Fig. 7, the output energy of this moment is provided by capacitor C 1, be lower than expectation voltage if sample the high terminal voltage of bus, high-end busbar voltage controller CK
1Control circuit output pulse width modulation signal
Duty ratio K
1Will reduce, shorten the closing time of positive half period power switch pipe Q1 to reduce the discharge time of bus capacitor, power output is reduced, the energy storage of bus capacitor C1 will increase like this, thereby its voltage is raise until equate with desired value; Be higher than expectation voltage if sample the voltage of capacitor C 1, high-end busbar voltage controller CK
1Will prolong the closing time of shortening positive half period power switch pipe Q1 to increase the discharge time of bus capacitor, power output is increased, the energy storage of electric capacity will reduce like this, thereby make its lower voltage until equate with desired value, repetitive control has just reached and has controlled the stable purpose of high-end capacitance voltage like this.When the work of bus low side electric capacity, line voltage and grid-connected current all are negative, power output is shown in the right half period of Fig. 7, and the output energy of this moment is mainly provided by bus low side capacitor C 2, adopts the method identical with high-end voltage control can reach stable by control bus low side capacitance voltage equally.
The present invention is when controlling capacitance voltage, the value that equates is got in the high-end and low terminal voltage expectation of bus, although bus height terminal voltage is separately control like this, when the high low side capacitance voltage of control bus was stabilized in desired value, bus is high-end also to be equated with the low side capacitance voltage simultaneously.So use bus voltage stabilization control device of the present invention not only can make the busbar voltage fast and stable, can also reach the effect of bus height terminal voltage balance simultaneously.
Although the above is described the illustrative embodiment of the present invention; so that the technical staff of present technique neck understands the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various variations appended claim limit and the spirit and scope of the present invention determined in, these variations are apparent, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (3)
1. a bus voltage stabilization control device is characterized in that, comprising:
Two busbar voltage transducers are sampled to the high-end capacitor C 1 of bus of series connection, the voltage at bus low side capacitor C 2 two ends respectively, obtain the high low side capacitance voltage of bus sampled value
Wherein, sample frequency is 100Hz/N, and N is the integer more than or equal to 1;
One high-end busbar voltage controller, it is input as the high-end capacitance voltage sampled value of bus
Be output as the pulse width modulating signal of positive half period power switch pipe switch in the control half-bridge inversion circuit
One low side busbar voltage controller, it is input as bus low side capacitance voltage sampled value
Be output as the pulse width modulating signal of negative half-cycle power switch pipe switch in the control half-bridge inversion circuit
The pulse width modulating signal of high-end busbar voltage controller output
With low side busbar voltage controller output pulse width modulation signal
High-low level opposite, duty ratio K
1With duty ratio K
2Sum equals 1;
At positive half period, duty ratio K
1Greater than duty ratio K
2, when the high-end capacitance voltage sampled value of bus
Be lower than bus desired voltage values U
Ref, then reduce the pulse width modulating signal that high-end busbar voltage controller is exported
Duty ratio K
1On the contrary, if the high-end capacitance voltage sampled value of bus
Be higher than bus desired voltage values U
Ref, then increase the duty ratio K of the pulse width modulating signal of high-end busbar voltage controller output
1
At negative half-cycle, duty ratio K
1Less than duty ratio K
2, when bus low side capacitance voltage sampled value
Be lower than bus desired voltage values U
Ref, then reduce the duty ratio K of the pulse width modulating signal of low side busbar voltage controller output
2On the contrary, if bus low side capacitance voltage sampled value
Be higher than bus desired voltage values U
Ref, then increase the pulse width modulating signal that low side busbar voltage controller is exported
Duty ratio K
2
2. bus voltage stabilization control device according to claim 1 is characterized in that, described high-end busbar voltage controller comprises subtracter, PID controller and half-bridge control algolithm device G (S);
Subtracter is with the high-end capacitance voltage sampled value of bus
With bus desired voltage values U
RefCompare, obtain bus desired voltage values U
RefWith high-end capacitance voltage sampled value
Difference U
Err1, then, with difference U
Err1Send in the PID controller, convert the desired value I of grid-connected current to
Ref1, the desired value I of grid-connected current
Ref1Send in the half-bridge control algolithm device and convert pulse width modulating signal to
The switch of the positive half period power switch pipe in the control half-bridge inversion circuit;
When the high-end capacitance voltage sampled value of the bus that detects
Be lower than bus desired voltage values U
Ref, the difference U that obtains
Err1For just, like this, the desired value I of the grid-connected current of in the PID controller, exporting
Ref1To reduce, convert pulse width modulating signal in the half-bridge control algolithm device
Duty ratio K
1Also reduce accordingly, the bus circuit power output reduces, the high-end capacitor C of bus
1Energy storage will increase, thereby make its voltage sample value
Raise, until with bus desired voltage values U
RefEquate; In like manner, when the high-end capacitance voltage sampled value of the bus that detects
Be higher than bus desired voltage values U
RefThe time, the difference U that obtains
Err1For negative, like this, the desired value I of the grid-connected current of in the PID controller, exporting
Ref1To increase, convert pulse width modulating signal in the half-bridge control algolithm device
Duty ratio K
1Also increase accordingly, the bus circuit power output increases, the high-end capacitor C of bus
1Energy storage will reduce, thereby make its voltage sample value
Reduce, until with bus desired voltage values U
RefEquate.
3. bus voltage stabilization control device according to claim 2 is characterized in that, among the described half-bridge control algolithm device G (S), and the grid-connected current desired value I of input
Ref1With actual value IL
1Differ, half-bridge control algolithm device G (S) is by the regulating impulse bandwidth modulation signals
Duty ratio K
1, regulate grid-connected current actual value IL
1Size, make the desired value I with its grid-connected current
Ref1Equate; If the grid-connected current actual value IL of output
1Desired value I less than grid-connected current
Ref1, then half-bridge control algolithm device G (S) increases pulse width modulating signal
Duty ratio is K
1, strengthen positive half period power switch pipe G
K(s) switch ratio increases grid-connected current actual value IL
1, make it reach the desired value I of grid-connected current
Ref1As the same on the contrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010288661 CN101969274B (en) | 2010-09-21 | 2010-09-21 | Bus voltage stabilization control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010288661 CN101969274B (en) | 2010-09-21 | 2010-09-21 | Bus voltage stabilization control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101969274A CN101969274A (en) | 2011-02-09 |
| CN101969274B true CN101969274B (en) | 2013-04-17 |
Family
ID=43548385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010288661 Expired - Fee Related CN101969274B (en) | 2010-09-21 | 2010-09-21 | Bus voltage stabilization control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101969274B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI442668B (en) * | 2011-09-13 | 2014-06-21 | Motech Ind Inc | Alternating current line emulator |
| KR101462750B1 (en) * | 2013-01-16 | 2014-11-17 | 삼성전기주식회사 | Multi level inverter |
| WO2016168999A1 (en) * | 2015-04-22 | 2016-10-27 | 阳光电源股份有限公司 | Miniature photovoltaic inverter and control method therefor |
| CN105356445B (en) * | 2015-12-21 | 2017-12-12 | 常熟开关制造有限公司(原常熟开关厂） | PID effects restraining device and photovoltaic generating system for photovoltaic generating system |
| CN107425546B (en) * | 2017-08-25 | 2020-09-29 | 上海蓝瑞电气有限公司 | Method for accurately adjusting bus voltage of inverter so as to improve grid-connected efficiency |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1787717A (en) * | 2005-11-18 | 2006-06-14 | 清华大学 | Solar energy high voltage sodium lamp controller based on single stage inverter |
| WO2007096994A1 (en) * | 2006-02-24 | 2007-08-30 | Mitsubishi Denki Kabushiki Kaisha | System-cooperative inverter |
| JP4244025B2 (en) * | 2004-07-06 | 2009-03-25 | 株式会社荏原電産 | Distributed power supply device and method for detecting DC ground fault thereof |
| CN201234142Y (en) * | 2008-06-06 | 2009-05-06 | 江苏津恒能源科技有限公司 | Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3216969B2 (en) * | 1995-06-07 | 2001-10-09 | 日本電信電話株式会社 | Uninterruptible solar power generation system |
-
2010
- 2010-09-21 CN CN 201010288661 patent/CN101969274B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4244025B2 (en) * | 2004-07-06 | 2009-03-25 | 株式会社荏原電産 | Distributed power supply device and method for detecting DC ground fault thereof |
| CN1787717A (en) * | 2005-11-18 | 2006-06-14 | 清华大学 | Solar energy high voltage sodium lamp controller based on single stage inverter |
| WO2007096994A1 (en) * | 2006-02-24 | 2007-08-30 | Mitsubishi Denki Kabushiki Kaisha | System-cooperative inverter |
| CN201234142Y (en) * | 2008-06-06 | 2009-05-06 | 江苏津恒能源科技有限公司 | Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101969274A (en) | 2011-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101582592B (en) | Transformer-less photovoltaic merging and inverting device and control method thereof | |
| CN104810857B (en) | Single-phase grid-connected photovoltaic power generation system output power smooth control device and control method | |
| Liang et al. | Predictive control of a series-interleaved multicell three-level boost power-factor-correction converter | |
| CN101777775A (en) | High-frequency isolation single-phase photovoltaic grid-connected system and control method thereof | |
| CN101969274B (en) | Bus voltage stabilization control device | |
| CN113193755B (en) | Multi-port converter based on topology integration, control method and system | |
| CN104578856A (en) | Single-stage non-isolated non-electrolytic-capacitor double-Zeta inverter | |
| CN109889036A (en) | A kind of IPOS DC charging power supply for tracking best efficiency point | |
| Ansari et al. | A new control method for an interleaved flyback inverter to achieve high efficiency and low output current THD | |
| CN112865550A (en) | Double-active-bridge converter with input connected in parallel and output connected in series and control method thereof | |
| Chuang et al. | Research on photovoltaic grid-connected control of Z source inverter based on active disturbance rejection technology | |
| Diab et al. | Modified modulation scheme for photovoltaic fed grid-connected three-phase boost inverter | |
| Shanthi et al. | Power electronic interface for grid-connected PV array using boost converter and line-commutated inverter with MPPT | |
| CN109274281B (en) | Suppression system and suppression method for low-frequency input pulsating current of photovoltaic grid-connected inverter | |
| CN203278685U (en) | Inverter | |
| CN112003319B (en) | Double-current feedback control method applied to bidirectional grid-connected converter | |
| CN112242699B (en) | Improved self-adaptive active damping control method for isolated direct-current micro-grid | |
| Sun et al. | A PV generation system based on centralized-distributed structure and cascaded power balancing mechanism for DC microgrids | |
| Elamathy et al. | Multiport DC-DC interleaved boost converter supplemented by hybrid system of different capacities PV and battery power system | |
| Simiyu et al. | Modelling and Control of Multi-terminal MVDC Distribution Network | |
| CN103631309B (en) | The MPPT control method of single-stage photovoltaic inverter | |
| Choi et al. | Photovoltaic module integrated converter system minimizing input ripple current for inverter load | |
| CN105429502A (en) | Single-stage non-isolated double-Cuk type inverter without electrolytic capacitor | |
| CN103219747B (en) | Method for realizing high efficiency and high reliability of photovoltaic grid-connected micro inverter | |
| Fan et al. | Simplified model and control of dual active bridge Series resonant converter |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20150921 |
|
| EXPY | Termination of patent right or utility model |