CN205509499U - A control system for suppressing photovoltaic water pump busbar voltage disturbance - Google Patents
A control system for suppressing photovoltaic water pump busbar voltage disturbance Download PDFInfo
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- CN205509499U CN205509499U CN201620114492.1U CN201620114492U CN205509499U CN 205509499 U CN205509499 U CN 205509499U CN 201620114492 U CN201620114492 U CN 201620114492U CN 205509499 U CN205509499 U CN 205509499U
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- Prior art keywords
- water pump
- photovoltaic
- controller
- busbar voltage
- control system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a control system for suppressing photovoltaic water pump busbar voltage disturbance, including photovoltaic array, photovoltaic array has connected gradually converter, water pump, photovoltaic array's output voltage vdc signal and output current ipv signal connection controller, and photovoltaic array's output voltage vdc signal connection simulates differentiating circuit, and the simulation differentiating circuit be connected with the controller, and the controller is connected with the converter. The utility model relates to a control system for suppressing photovoltaic water pump busbar voltage disturbance, the control mode who adopts the digifax to combine realize the undulant technique of handling to busbar voltage, and wherein analog circuit adopts essential differential limiting circuit, and low cost when effectively realizing virtual capacitive reactance, has saved the controller cost to the stability that virtual capacitive reactance realized has been improved.
Description
Technical field
This utility model belongs to the control system technical field of photovoltaic water pump system, be specifically related to a kind of for
The control system of suppression photovoltaic water pump busbar voltage disturbance.
Background technology
Photovoltaic water pump system utilizes photovoltaic battery array to convert light energy into electric energy, and turns through inverter etc.
Electric energy is transmitted and drives water pump even load by changing device, thus serves carrying in the case of accessing without electrical network
Water, irrigation, with the specific requirement in terms of the life requirements such as water and environmental protection and energy saving.Photovoltaic water pump system
Occur that the remote districts to not accessing electrical network bring huge benefit, particularly to agricultural irrigation, life
Live and water for industrial use creates certain positive impact.
For the efficiency of acquisition photovoltaic water pump system luminous energy as much as possible conversion, it is necessary for carrying out maximum work
Rate point is followed the tracks of.Along with the change of the conditions such as illumination temperature, photovoltaic array work maximum power point changes therewith,
Also the operating point making water pump load running changes.When MPPT maximum power point tracking makes pump working exist
Certain frequency band, particularly during low-frequency range, owing to self mechanical property and working environment characteristic make it hold
It is easily formed resonance.The resonance of water pump can cause the fluctuation of output, and then has influence on photovoltaic array to inverse
Becoming the busbar voltage that device directly provides, the stable operation of inverter can be caused by the fluctuation of this busbar voltage
Adverse effect, busbar voltage can be collapsed near resonant frequency, makes inverter to work.
Disposal way has usually: one is quickly to cross this frequency band, or just keeps away when selected equipment
Exempt to make pump working at this frequency band.Two is to realize respective algorithms on software, extracts the micro-of busbar voltage
Sub-signal and then suppression busbar voltage fluctuation.
But, for quickly cross resonant frequency section or avoid make pump working this frequency band method also
Being not suitable for load is the water pump that circulating pump etc. needs low frequency operation.For the general photovoltaic that cost requirement is higher
Water pump system, the process realizing respective algorithms on software makes system have the highest to the process performance of chip
Requirement, this substantially increases the cost of system and device.
Utility model content
The purpose of this utility model is to provide a kind of control for suppressing photovoltaic water pump busbar voltage disturbance
System, solves the problem that prior art median generatrix voltage disturbance causes invertor operation instability.
This utility model be employed technical scheme comprise that, one is used for suppressing photovoltaic water pump busbar voltage disturbance
Control system, including photovoltaic array, photovoltaic array is connected with converter, water pump, photovoltaic array in turn
Output voltage vdcSignal and output electric current ipvSignal access controller, the output voltage v of photovoltaic arraydc
Signal accesses analog differentiation circuit, and analog differentiation circuit is connected with controller, and controller is connected with converter.
Feature of the present utility model also resides in,
The control chip of controller uses XE162 or the XE164 series monolithic of Infineon.
The beneficial effects of the utility model are: this utility model one is used for suppressing photovoltaic water pump busbar voltage
The control system of disturbance, the control mode using digital-to-analogue to combine realizes the skill processing busbar voltage fluctuation
Art, wherein analog circuit uses basic differential limiting circuit, with low cost, is effectively realizing virtual appearance
While Kang, save controller cost, and improve the degree of stability that virtual capacitive reactance realizes.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model control system；
Fig. 2 is that in this utility model, MPPT combines with analog differentiation circuit system block diagram；
Fig. 3 is analog differentiation electrical block diagram in this utility model；
Fig. 4 is this utility model and traditional PID control comparison diagram.
In figure, 1. photovoltaic array, 2. converter, 3. water pump, 4. controller, 5. analog differentiation circuit.
Detailed description of the invention
With detailed description of the invention, this utility model is described in detail below in conjunction with the accompanying drawings.
This utility model is a kind of for suppressing the control system of photovoltaic water pump busbar voltage disturbance, such as Fig. 1 institute
Showing, including photovoltaic array 1, photovoltaic array 1 is connected with converter 2, water pump 3, photovoltaic array 1 in turn
Output voltage vdcSignal and output electric current ipvSignal access controller 4, the control chip of controller 4
The series monolithics such as XE162 or XE164 of employing Infineon, the output voltage v of photovoltaic array 1dc
Signal accesses analog differentiation circuit 5, and analog differentiation circuit 5 is connected with controller 4, controller 4 and change
Frequently device 2 connects.
The MPPT method of photovoltaic water pump combines schematic diagram as shown in Figure 2 with analog differentiation circuit.
In Fig. 2, MPPT maximum power point tracking in controller 4 (MPPT) part, sampling obtains photovoltaic
The output voltage v of arraydcWith output electric current idc, it is calculated busbar voltage reference value through MPPT algorithm
vdc_ref；Conventional MPPT method has determines voltage method, disturbance observational method and conductance increment method etc..PI
Actuator part, busbar voltage reference value v that will obtaindc_refWith virtual voltage vdcMake poor error to e,
Using this error e as the input of pi regulator.
Analog differentiation circuit 5 part, in Fig. 2, its realization of analog differentiation circuit expressions formula is as shown in Figure 3.
In expression formula, τ is expressed as derivative time constant τ=RC, τ1For in analog differentiation circuit inertial element time
Between constant, τ1=rC.Z1、Z2For Zener diode.Bus voltage signal is after analog differentiation circuit 5
Obtain differential signal.
As shown in Figure 4, traditional PID controls input for set-point urefWith value of feedback ykDifference e,
And PI controller 4 of the present utility model input is set-point urefWith value of feedback ykDifference e, simulate micro-
Parallel circuit 5 input is feedback signal yk.One advantage of this way is the direct place to feedback signal information
Reason, and traditional PID controls that high-frequency signal response is easily produced overshoot and even vibrates.Analog differentiation electricity
The introducing on road 5 directly filters corresponding high-frequency signal, and is easy to realize direct current female with relatively low cost
The extraction of line voltage derivative signal.
This utility model is difficult to the principle of sudden change according to the voltage at dc-link capacitance two ends, and application simulation is micro-
Parallel circuit 5 is acted on by control and regulation so that bus two ends are similar has accessed electric capacity, thus suppresses bus
The fluctuation of voltage.
The method that this utility model is combined with analog differentiation circuit 5 by MPPT maximum power point tracking, it is achieved
Maximum power point is tracked simultaneously, and analog differentiation circuit 5 obtains busbar voltage differential signal, further
Realize the fluctuation of suppression busbar voltage.Make water pump 3 in photovoltaic water pump system can be in wider frequency
MPPT maximum power point tracking is carried out in band.
The while that this utility model promoting the efficiency that luminous energy is changed to electric energy, improve photovoltaic water pump system stable
Property, this utility model simple analog differentiation circuit 5 also achieves the reduction of system hardware cost simultaneously.
Claims (2)
1. the control system being used for suppressing photovoltaic water pump busbar voltage disturbance, it is characterised in that include
Photovoltaic array (1), photovoltaic array (1) is connected with converter (2), water pump (3), photovoltaic battle array in turn
The output voltage v of row (1)dcSignal and output electric current ipvSignal access controller (4), photovoltaic array (1)
Output voltage vdcSignal accesses analog differentiation circuit (5), analog differentiation circuit (5) and controller (4)
Connecting, controller (4) is connected with converter (2).
The most according to claim 1 a kind of for suppressing the control system of photovoltaic water pump busbar voltage disturbance
System, it is characterised in that the control chip of described controller (4) use Infineon XE162 or
XE164 series monolithic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620114492.1U CN205509499U (en) | 2016-02-04 | 2016-02-04 | A control system for suppressing photovoltaic water pump busbar voltage disturbance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620114492.1U CN205509499U (en) | 2016-02-04 | 2016-02-04 | A control system for suppressing photovoltaic water pump busbar voltage disturbance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205509499U true CN205509499U (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620114492.1U Expired - Fee Related CN205509499U (en) | 2016-02-04 | 2016-02-04 | A control system for suppressing photovoltaic water pump busbar voltage disturbance |
Country Status (1)
| Country | Link |
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| CN (1) | CN205509499U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538458A (en) * | 2019-01-10 | 2019-03-29 | 东莞市深鹏电子有限公司 | A kind of solar water pump regulating device and its control method |
-
2016
- 2016-02-04 CN CN201620114492.1U patent/CN205509499U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538458A (en) * | 2019-01-10 | 2019-03-29 | 东莞市深鹏电子有限公司 | A kind of solar water pump regulating device and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20190204 |