CN105429171A - Controller of solar photovoltaic power plant and method - Google Patents
Controller of solar photovoltaic power plant and method Download PDFInfo
- Publication number
- CN105429171A CN105429171A CN201510767490.2A CN201510767490A CN105429171A CN 105429171 A CN105429171 A CN 105429171A CN 201510767490 A CN201510767490 A CN 201510767490A CN 105429171 A CN105429171 A CN 105429171A
- Authority
- CN
- China
- Prior art keywords
- voltage
- module
- controller
- power plant
- photovoltaic power
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 230000000052 comparative effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000013480 data collection Methods 0.000 abstract 2
- 238000012544 monitoring process Methods 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02E40/30—Reactive power compensation
Abstract
The present invention discloses a controller of a solar photovoltaic power plant and a control method. The controller comprises a data collection and monitoring system and a reactive power coordinated controller. The reactive power coordinated controller comprises a detection module, a voltage regulation control module, a trigger module, and a communication module. The detection module comprises a system voltage detection module and a system current sampling module. The system voltage regulation module is used for comparing the measurement value of the detection module and a setting value and outputting a comparison result. The trigger module is used for controlling a photovoltaic power plant interver and a capacitor component. The communication module is used for obtaining an adjustment command and uploading a sampling value to the data collection and monitoring system. The reactive power is controlled from the angle of reactive voltage adjustment, specifically with the voltage of a grid connected point as a basis, the reactive power consumption of the photovoltaic power plant is calculated, thus reasonable reactive power allocation is obtained, and the voltage of the photovoltaic power plant can be maintained to be stable.
Description
Technical field
The present invention relates to the control in photovoltaic field, particularly photovoltaic plant.
Background technology
Along with the develop rapidly of photovoltaic technology, various photovoltaic product comes into huge numbers of families, and effective use of solar energy makes using energy source approach more and environmental friendliness.
Solar energy power generating is a kind of effective way that can utilize solar energy on a large scale, but adds electrical network due to solar power generation, and produce interference to the stability of traditional electrical network, especially the problem of the grid-connected spread of voltage of photovoltaic plant needs solution badly.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of controller and control method of solar photovoltaic power plant, for solving the technical problem of the grid-connected spread of voltage of solar photovoltaic power plant.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A controller for solar photovoltaic power plant, comprises data acquisition and surveillance and idle tuning controller;
Described idle tuning controller comprises detection module, voltage-regulation control module, trigger module and communication module;
Described detection module comprises system voltage detection module and system power sampling module;
Described system voltage adjustment module is used for the measured value of detection module to export comparative result compared with set point;
Described trigger module is for controlling photovoltaic plant inverter and capacitance component;
Described communication module is for obtaining regulating command and sampled value being uploaded to data acquisition and surveillance;
Further, in the present invention, described communication module adopts MMS communication network.
Further, in the present invention, described idle tuning controller accesses electrical network by bus mode.
A control method for solar photovoltaic power plant, comprises the following steps that order performs:
Step one, and current-voltage transformer is installed at site place, measure and the electric current at site place and voltage;
Step 2, the voltage acquisition voltage deviation compared with the voltage at power supply place will recorded in step one, compare voltage deviation and the permission voltage deviation preset, and obtains the impedance between photovoltaic plant and electrical network;
Step 3, Target of Reactive Power value according to the photovoltaic plant of the impedance obtained in step 2;
Step 4, according to the difference between the voltage deviation band allowed when the voltage deviation in the Target of Reactive Power value determining step two in step 3 and default short circuit, if the voltage deviation band that the voltage deviation in step 2 allows when exceeding default short circuit, judge to need to enter reactive voltage cooperation control, otherwise without the need to entering reactive voltage cooperation control.
Beneficial effect:
Due to for photovoltaic generation, usually adopt the mode that is incorporated into the power networks of firm power, therefore do not produce reactive power exchange in theory and between electrical network, but there is reactive loss in running, therefore in reality, photovoltaic plant needs consume reactive power.
The angle control reactive power that the present invention regulates from reactive voltage, specifically with the grid-connected voltage pointed out for according to 93 go out photovoltaic plant reactive power consumption thus obtain rational reactive power distribute, make the voltage of photovoltaic plant can keep stable.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
The controller of a kind of solar photovoltaic power plant as shown in Figure 1, comprises data acquisition and surveillance and idle tuning controller; Described idle tuning controller comprises detection module, voltage-regulation control module, trigger module and MMS communication module, and described idle tuning controller accesses electrical network by bus mode; Described detection module comprises system voltage detection module and system power sampling module; Described system voltage adjustment module is used for the measured value of detection module to export comparative result compared with set point; Described trigger module is for controlling photovoltaic plant inverter and capacitance component; Described communication module is for obtaining regulating command and sampled value being uploaded to data acquisition and surveillance.
Utilize said apparatus, carry out voltage control as follows:
Step one, and current-voltage transformer is installed at site place, measure and the electric current at site place and voltage;
Step 2, the voltage acquisition voltage deviation compared with the voltage at power supply place will recorded in step one, compare voltage deviation and the permission voltage deviation preset, and obtains the impedance between photovoltaic plant and electrical network;
Step 3, Target of Reactive Power value according to the photovoltaic plant of the impedance obtained in step 2;
Step 4, according to the difference between the voltage deviation band allowed when the voltage deviation in the Target of Reactive Power value determining step two in step 3 and default short circuit, if the voltage deviation band that the voltage deviation in step 2 allows when exceeding default short circuit, judge to need to enter reactive voltage cooperation control, otherwise without the need to entering reactive voltage cooperation control.
Claims (4)
1. a controller for solar photovoltaic power plant, is characterized in that: comprise data acquisition and surveillance and idle tuning controller;
Described idle tuning controller comprises detection module, voltage-regulation control module, trigger module and communication module;
Described detection module comprises system voltage detection module and system power sampling module;
Described system voltage adjustment module is used for the measured value of detection module to export comparative result compared with set point;
Described trigger module is for controlling photovoltaic plant inverter and capacitance component;
Described communication module is for obtaining regulating command and sampled value being uploaded to data acquisition and surveillance.
2. the controller of solar photovoltaic power plant according to claim 1, is characterized in that: described communication module adopts MMS communication network.
3. the controller of solar photovoltaic power plant according to claim 1, is characterized in that: described idle tuning controller accesses electrical network by bus mode.
4. a control method for solar photovoltaic power plant, is characterized in that: comprise the following steps that order performs:
Step one, and current-voltage transformer is installed at site place, measure and the electric current at site place and voltage;
Step 2, the voltage acquisition voltage deviation compared with the voltage at power supply place will recorded in step one, compare voltage deviation and the permission voltage deviation preset, and obtains the impedance between photovoltaic plant and electrical network;
Step 3, Target of Reactive Power value according to the photovoltaic plant of the impedance obtained in step 2;
Step 4, according to the difference between the voltage deviation band allowed when the voltage deviation in the Target of Reactive Power value determining step two in step 3 and default short circuit, if the voltage deviation band that the voltage deviation in step 2 allows when exceeding default short circuit, judge to need to enter reactive voltage cooperation control, otherwise without the need to entering reactive voltage cooperation control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510767490.2A CN105429171A (en) | 2015-11-11 | 2015-11-11 | Controller of solar photovoltaic power plant and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510767490.2A CN105429171A (en) | 2015-11-11 | 2015-11-11 | Controller of solar photovoltaic power plant and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105429171A true CN105429171A (en) | 2016-03-23 |
Family
ID=55507188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510767490.2A Pending CN105429171A (en) | 2015-11-11 | 2015-11-11 | Controller of solar photovoltaic power plant and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105429171A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868167A (en) * | 2012-09-11 | 2013-01-09 | 南京中德保护控制系统有限公司 | Reactive voltage control method of photovoltaic power station |
| CN103545931A (en) * | 2013-10-30 | 2014-01-29 | 国家电网公司 | Distributed type photovoltaic power generation grid connection interface device |
| CN103928944A (en) * | 2014-05-07 | 2014-07-16 | 国家电网公司 | Power output joint debugging device of photovoltaic inverter |
| CN103944172A (en) * | 2013-08-22 | 2014-07-23 | 南京南瑞集团公司 | Photovoltaic power station reactive voltage control method |
-
2015
- 2015-11-11 CN CN201510767490.2A patent/CN105429171A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868167A (en) * | 2012-09-11 | 2013-01-09 | 南京中德保护控制系统有限公司 | Reactive voltage control method of photovoltaic power station |
| CN103944172A (en) * | 2013-08-22 | 2014-07-23 | 南京南瑞集团公司 | Photovoltaic power station reactive voltage control method |
| CN103545931A (en) * | 2013-10-30 | 2014-01-29 | 国家电网公司 | Distributed type photovoltaic power generation grid connection interface device |
| CN103928944A (en) * | 2014-05-07 | 2014-07-16 | 国家电网公司 | Power output joint debugging device of photovoltaic inverter |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |
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| RJ01 | Rejection of invention patent application after publication |