CN103606957A - Design for multifunctional photovoltaic grid-connected control method - Google Patents
Design for multifunctional photovoltaic grid-connected control method Download PDFInfo
- Publication number
- CN103606957A CN103606957A CN201310647546.1A CN201310647546A CN103606957A CN 103606957 A CN103606957 A CN 103606957A CN 201310647546 A CN201310647546 A CN 201310647546A CN 103606957 A CN103606957 A CN 103606957A
- Authority
- CN
- China
- Prior art keywords
- grid
- photovoltaic
- voltage
- power
- loop
- 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 15
- 238000010248 power generation Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000011217 control strategy Methods 0.000 abstract description 8
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000021384 green leafy vegetables Nutrition 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Control Of Electrical Variables (AREA)
- Photovoltaic Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
本发明是一种多功能光伏并网控制方法设计。包括有：光伏发电模型，蓄电池模型，DC／DC控制器，DC／AC控制器，耦合电感器，断路器，工业负荷模型，功率测量装置以及相应的控制结构模型等。主要针对在配电网络的末端，特别是远离电网的边远地区，负载的无功波动将会对电网供电电压产生较大的影响，进而影响到该节点上的其他负荷。如果能够利用光伏发电系统调节并网节点的交流电压，将会对光伏发电系统的应用产生积极的影响，具有十分重要的意义。针对上述问题，本发明是一种基于最大功率点跟踪(MPPT)与电压控制相结合的三相光伏并网控制策略，使光伏系统在实现最大功率点跟踪的同时，还能够控制并网接入点处系统侧的交流电压，维持系统的电压恒定，以此节省相应设备的投资，提升光伏并网发电系统的应用前景。
The invention is a design of a multifunctional photovoltaic grid-connected control method. Including: photovoltaic power generation model, storage battery model, DC/DC controller, DC/AC controller, coupled inductor, circuit breaker, industrial load model, power measurement device and corresponding control structure model, etc. It is mainly aimed at the end of the power distribution network, especially in remote areas far away from the power grid. The reactive power fluctuation of the load will have a greater impact on the power supply voltage of the power grid, and then affect other loads on the node. If the photovoltaic power generation system can be used to adjust the AC voltage of grid-connected nodes, it will have a positive impact on the application of photovoltaic power generation systems, which is of great significance. In view of the above problems, the present invention is a three-phase photovoltaic grid-connected control strategy based on the combination of maximum power point tracking (MPPT) and voltage control, so that the photovoltaic system can also control grid-connected access while realizing maximum power point tracking The AC voltage on the system side at the point is maintained to keep the voltage of the system constant, so as to save the investment of corresponding equipment and improve the application prospect of photovoltaic grid-connected power generation system.
Description
Technical field
Requirement based on the energy, environment and economy sustainable development, designs the replacement to traditional electrical network, developing intellectual resource type, makes full use of the direction that renewable energy power generation is 21 century electric network reconstruction.Distributed photovoltaic power generation is owing to having adopted the clean solar energy of a large amount of greens and can become the important component part of power network development from now on for user provides reliable, high-quality electric energy.Up to now, being incorporated into the power networks in developing stage of distributed photovoltaic power generation, is very important so increase the research and design of the grid-connected control of distributed photovoltaic power generation.
The present invention---a kind of multifunctional photovoltaic parallel control method design, mainly for the end at distribution network, particularly, away from the outlying district of electrical network, the reactive power fluctuation of load will produce larger impact to mains supply voltage, and then has influence on other loads on this node.If can utilize photovoltaic generating system to regulate the alternating voltage of grid-connected node, will produce active influence to the application of photovoltaic generating system, tool is of great significance.
For the problems referred to above, the present invention is a kind of three-phase photovoltaic grid-connected control strategy combining with voltage control based on MPPT maximum power point tracking (MPPT), make photovoltaic system when realizing MPPT maximum power point tracking, can also control the alternating voltage of grid integration point place system side, maintain the voltage constant of system, with this, save the investment of relevant device, promote the application prospect of grid-connected photovoltaic system.The invention enables that distributed photovoltaic power generation is grid-connected provides frequency support to become possibility, for advancing the development of China's intelligent grid, played positive effect.
Background technology
Distributed photovoltaic power generation is electric network reconstruction, developing intellectual resource type, make full use of a Typical Representative of the generating of regenerative resource, yet in the grid-connected function of distributed photovoltaic power generation, the example of the method that neither one is clear and definite, therefore by photovoltaic generation and storage battery, coordinate for electrical network provides the method design that frequency supports and be necessary, this,, when advancing development of new techniques, has reached again significant effect.
Summary of the invention
Technical problem to be solved by this invention is, proposes the method for designing of the grid-connected control of a kind of effective photovoltaic generating system, for electrical network provides more electric energy, promotes the development of photovoltaic industry.
The present invention includes: photovoltaic generation model, battery model, control structure model, DC/DC controller, DC/AC controller, coupling inductor, circuit breaker, industrial load model, power-measuring device.
Photovoltaic generation model is the photovoltaic generation power stage in different illumination conditions, varying environment temperature for realistic simulation.
Battery model is the charge status of the different state-of-charges of main imitated storage battery from DC/DC controller.
DC/AC controller is that simulation control distributed power source is grid-connected, and coupling inductor is that simulation guarantees that line impedance presents perception.
Power detection device is for detection of the real-time active power of electrical network and reactive power.
MPPT-voltage controller is for DC/AC controller being produced to the control of specific function.
Accompanying drawing explanation
Fig. 1 is the whole principle assumption diagram of photovoltaic storage battery electricity generation system networking operation;
Fig. 2 is MPPT-voltage control strategy figure;
Embodiment
Below in conjunction with example and accompanying drawing, the present invention-a kind of multifunctional photovoltaic parallel control method design is elaborated.
As shown in Figure 1, photovoltaic cells does not adopt DC/DC controller, photovoltaic generation unit is connected on same DC bus with the storage battery through DC/DC controller, DC bus connects two-way DC/AC controller, by circuit breaker S1, connect industrial load model, butt coupling inductor again, this coupling inductor can, by circuit breaker S3 bypass, be connected with main electrical network finally by crossing circuit breaker S2.In Fig. 1, control system is divided into 3 parts: phase-locked loop module, MPPT-voltage controller module and impulse wave modulation module (PWM ripple).Phase-locked loop module is used for guaranteeing that photovoltaic system grid-connected current (Iabc) synchronizes with system voltage (Us), and output Sin_cos signal is to MPPT-voltage controller.MPPT-voltage controller receives measured value (Urms) and the reference value (Uref) of direct voltage (Udc), direct current (Idc), grid-connected current, alternating voltage, after MPPT-voltage control strategy is controlled, produce modulating wave (uabc), deliver to impulse wave modulation module, control photovoltaic generation from DC converting to the process exchanging.
As shown in Figure 2, a kind of three-phase photovoltaic grid-connected control strategy combining with voltage control based on MPPT maximum power point tracking (MPPT), its design philosophy is as follows:
In actual grid-connected photovoltaic system, its DC terminal is parallel with electric capacity of voltage regulation C, therefore, can utilize this electric capacity, controls the idle component of its output grid-connected current, with this, maintains the constant of grid-connected system side alternating voltage.The real component of simultaneously controlling grid-connected current by MPPT completes the control to meritorious output.By the control strategy of MPPT-voltage, control respectively the meritorious and idle component of grid-connected current, realize grid-connected maximum power point output and maintain node voltage constant.
As shown in Figure 2, what this control strategy was taked is two closed loop controlling structures, and its outer shroud is Voltage loop, and interior ring is grid-connected current ring.By abc/dq0, converting, is real component and idle component 2 parts by grid-connected current decoupling zero.
For real component, using the output valve of MPPT maximum power point tracking module (MPPT) (Um) as reference value, the real work voltage (Udc) of this value and photovoltaic array is compared, its deviation after proportional integral (PI) regulates resulting value (Idref) as the active component of current reference value of grid-connected current ring.
For idle component, the alternating voltage reference value (Uref) of setting and the virtual voltage (Urms) of AC system are compared, its deviation after PI regulates resulting value (Iqref) as the reactive component of current reference value of grid-connected current ring.
The real component of grid-connected current (Id) and idle component (Iq) be the difference after relatively with reference quantity Idref, Iqref respectively, through proportional component PI, regulate, and after dq0/abc inverse transformation, output modulating wave (uabc), realizes grid-connected direct current to the inversion exchanging with this.
Therefore, this control strategy system not only can realize three-phase photovoltaic grid-connected MPPT maximum power point tracking, can also control the alternating voltage of photovoltaic generating system access point, has further promoted the effect of grid-connected photovoltaic system.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310647546.1A CN103606957A (en) | 2013-12-02 | 2013-12-02 | Design for multifunctional photovoltaic grid-connected control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310647546.1A CN103606957A (en) | 2013-12-02 | 2013-12-02 | Design for multifunctional photovoltaic grid-connected control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103606957A true CN103606957A (en) | 2014-02-26 |
Family
ID=50125162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310647546.1A Pending CN103606957A (en) | 2013-12-02 | 2013-12-02 | Design for multifunctional photovoltaic grid-connected control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103606957A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986191A (en) * | 2014-05-27 | 2014-08-13 | 东北电力大学 | Operation feasible zone evaluation method for high-capacity photovoltaic inverter system connected to power grid |
| CN104079002A (en) * | 2014-07-16 | 2014-10-01 | 安徽启光能源科技研究院有限公司 | Double-closed-loop control method of photovoltaic energy storage system in grid-connection mode |
| CN104810858A (en) * | 2015-05-27 | 2015-07-29 | 广西大学 | Control method for grid-connected power generation system of optical storage microgrid |
| CN105552961A (en) * | 2016-01-07 | 2016-05-04 | 重庆交通大学 | Grid-connection control method for distributed photovoltaic power generation module |
| CN105870953A (en) * | 2016-04-01 | 2016-08-17 | 国家电网公司 | Light storage combined grid-connected system and control method thereof |
| CN106374517A (en) * | 2016-11-15 | 2017-02-01 | 湖南省德沃普储能有限公司 | Battery energy storage system for alleviating problem of photovoltaic power generation abandoning and limiting and control method therefor |
| CN107104458A (en) * | 2017-04-21 | 2017-08-29 | 句容市宝启电子科技有限公司 | A kind of parallel network reverse distributed generation system of solar energy |
| CN109412156A (en) * | 2018-11-16 | 2019-03-01 | 东莞市凯登能源科技有限公司 | A kind of electric power orientation transport control system |
| CN109449989A (en) * | 2018-12-17 | 2019-03-08 | 江苏固德威电源科技股份有限公司 | A kind of inverter input side control method and the inverter using it |
| CN110095654A (en) * | 2019-05-09 | 2019-08-06 | 东北电力大学 | A kind of power grid inductance detection method |
| CN114512978A (en) * | 2022-03-03 | 2022-05-17 | 山东大学 | Control method for series networking type wind power full-direct-current sending system |
-
2013
- 2013-12-02 CN CN201310647546.1A patent/CN103606957A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986191B (en) * | 2014-05-27 | 2016-03-30 | 东北电力大学 | Large Copacity photovoltaic inverting system access operation of power networks feasible zone evaluation method |
| CN103986191A (en) * | 2014-05-27 | 2014-08-13 | 东北电力大学 | Operation feasible zone evaluation method for high-capacity photovoltaic inverter system connected to power grid |
| CN104079002B (en) * | 2014-07-16 | 2016-09-28 | 安徽启光能源科技研究院有限公司 | Double-closed-loop control method under photovoltaic energy storage system grid connection pattern |
| CN104079002A (en) * | 2014-07-16 | 2014-10-01 | 安徽启光能源科技研究院有限公司 | Double-closed-loop control method of photovoltaic energy storage system in grid-connection mode |
| CN104810858A (en) * | 2015-05-27 | 2015-07-29 | 广西大学 | Control method for grid-connected power generation system of optical storage microgrid |
| CN104810858B (en) * | 2015-05-27 | 2017-03-29 | 广西大学 | A kind of light stores up the control method of micro-grid connection electricity generation system |
| CN105552961A (en) * | 2016-01-07 | 2016-05-04 | 重庆交通大学 | Grid-connection control method for distributed photovoltaic power generation module |
| CN105552961B (en) * | 2016-01-07 | 2018-04-03 | 重庆交通大学 | Distributed photovoltaic power generation module grid-connected control method |
| CN105870953A (en) * | 2016-04-01 | 2016-08-17 | 国家电网公司 | Light storage combined grid-connected system and control method thereof |
| CN105870953B (en) * | 2016-04-01 | 2018-06-05 | 国家电网公司 | A kind of light storage joint grid-connected system and its control method |
| CN106374517A (en) * | 2016-11-15 | 2017-02-01 | 湖南省德沃普储能有限公司 | Battery energy storage system for alleviating problem of photovoltaic power generation abandoning and limiting and control method therefor |
| CN106374517B (en) * | 2016-11-15 | 2019-02-26 | 湖南德沃普新能源有限公司 | A kind of battery energy storage system control method for reducing photovoltaic plant abandoning light and rationing the power supply |
| CN107104458A (en) * | 2017-04-21 | 2017-08-29 | 句容市宝启电子科技有限公司 | A kind of parallel network reverse distributed generation system of solar energy |
| CN109412156A (en) * | 2018-11-16 | 2019-03-01 | 东莞市凯登能源科技有限公司 | A kind of electric power orientation transport control system |
| CN109412156B (en) * | 2018-11-16 | 2021-10-08 | 东莞市凯登能源科技有限公司 | Electric power directional transmission control system |
| CN109449989A (en) * | 2018-12-17 | 2019-03-08 | 江苏固德威电源科技股份有限公司 | A kind of inverter input side control method and the inverter using it |
| CN109449989B (en) * | 2018-12-17 | 2021-10-12 | 江苏固德威电源科技股份有限公司 | Inverter input side control method and inverter applying same |
| CN110095654A (en) * | 2019-05-09 | 2019-08-06 | 东北电力大学 | A kind of power grid inductance detection method |
| CN114512978A (en) * | 2022-03-03 | 2022-05-17 | 山东大学 | Control method for series networking type wind power full-direct-current sending system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103606957A (en) | Design for multifunctional photovoltaic grid-connected control method | |
| CN104638645B (en) | A kind of energy the Internet and its multi-level control system and control method | |
| CN104852406B (en) | Mixed micro-grid system based on power electronic transformer and power control method of system | |
| Ganesan et al. | Control scheme for a bidirectional converter in a self-sustaining low-voltage DC nanogrid | |
| CN103683517B (en) | A kind of mixed energy storage system being applied to micro-capacitance sensor | |
| CN103762610B (en) | Based on the distributed energy storage system of principal and subordinate's droop control | |
| CN110086200B (en) | Coordination control method for hybrid series-parallel micro-grid in island mode | |
| CN106803672A (en) | The energy source router and control strategy of family type energy LAN | |
| CN104600719B (en) | A kind of photovoltaic generating system grid integration Comprehensive Reactive Power Compensation control system and method | |
| CN107579514B (en) | A wind-solar storage DC power system and control method for offshore platforms | |
| CN105356505A (en) | Multi-source distributed power generation system suitable for micro electrical network and control method | |
| CN103956778A (en) | Micro-grid system and networking method based on phase angle droop control | |
| CN107612025B (en) | Improved control method of current-controlled inverter in microgrid | |
| CN107910889A (en) | A kind of grid-connected control method of photovoltaic micro | |
| CN106786745A (en) | A kind of circuit topology of the multiport electric power energy collector of DC-isolation type | |
| CN118300184A (en) | Network construction control system and method for new energy and energy storage station | |
| CN110460056A (en) | Coordinated control method of series compensation link and AC-DC bus interface converter | |
| CN109921466A (en) | Load shedding operation control method for two-level photovoltaic power generation system based on ramp power | |
| Zhou et al. | Analysis of primary frequency regulation characteristics of PV power plant considering communication delay | |
| CN107910888A (en) | A kind of MPPT grid-connected control methods for photovoltaic series connection micro-capacitance sensor | |
| CN103427437A (en) | Central controller device | |
| CN106877411A (en) | A kind of alternating current-direct current mixing microgrid cooperative control method | |
| CN107069820B (en) | Distributed renewable energy power generation grid-connected power fluctuation control system and control method | |
| Wu et al. | Frequency control in microgrids using electric springs | |
| CN203747438U (en) | An integrated device for a microgrid simulation platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Tianjin Polytechnic University Document name: Notification that Application Deemed to be Withdrawn |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140226 |