CN106952547B - Grid-connected photovoltaic power generation teaching experimental device - Google Patents
Grid-connected photovoltaic power generation teaching experimental device Download PDFInfo
- Publication number
- CN106952547B CN106952547B CN201710362371.8A CN201710362371A CN106952547B CN 106952547 B CN106952547 B CN 106952547B CN 201710362371 A CN201710362371 A CN 201710362371A CN 106952547 B CN106952547 B CN 106952547B
- Authority
- CN
- China
- Prior art keywords
- grid
- voltage
- mcu
- power generation
- drive circuit
- 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
- 238000010248 power generation Methods 0.000 title claims abstract description 39
- 238000002474 experimental method Methods 0.000 claims abstract description 11
- 238000004088 simulation Methods 0.000 claims abstract description 8
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 6
- 238000012549 training Methods 0.000 abstract description 5
- 230000005284 excitation Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Computational Mathematics (AREA)
- Algebra (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Power Engineering (AREA)
- Pure & Applied Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Description
技术领域Technical field
发明涉及光伏发电并网技术，特别涉及并网光伏发电教学实验装置。The invention relates to photovoltaic power generation grid-connected technology, and in particular to a grid-connected photovoltaic power generation teaching experimental device.
背景技术Background technique
并网光伏发电是新能源开发利用的重要途径之一。并网光伏发电系统包括光伏阵列和并网逆变器，其中并网逆变器是光伏发电系统的核心装置。由于光伏阵列输出的电流、电压具有强烈的非线性，又由于光伏阵列所处环境的光强和环境温度等条件的不断变化，并网逆变器不仅具有将不断变化的直流电转化为稳定的交流电，还必须具有复杂的功率最大点跟踪算法（MPPT）和同步并网算法。为了便于科研院所对并网逆变器的复杂控制算法的开发，以及高校对并网光伏发电系统原理的教学实验研究需求和推广，有些公司推出各种光伏发电系统的实验和实训平台，但是该平台的缺点是：价格非常贵且输出电压为220V或380V，对于非电气类高校和非电类专业学生来说，根本无法承受昂贵的经济负担和非电类学生实验安全要求。Grid-connected photovoltaic power generation is one of the important ways to develop and utilize new energy. The grid-connected photovoltaic power generation system includes a photovoltaic array and a grid-connected inverter, of which the grid-connected inverter is the core device of the photovoltaic power generation system. Since the current and voltage output by the photovoltaic array are highly nonlinear, and due to the constant changes in the light intensity and ambient temperature of the environment in which the photovoltaic array is located, the grid-connected inverter not only has the ability to convert the changing direct current into stable alternating current. , it must also have complex maximum power point tracking algorithm (MPPT) and synchronous grid connection algorithm. In order to facilitate the development of complex control algorithms for grid-connected inverters by scientific research institutes, as well as the needs and promotion of teaching and experimental research on the principles of grid-connected photovoltaic power generation systems in universities, some companies have launched various experimental and practical training platforms for photovoltaic power generation systems. However, the disadvantages of this platform are that it is very expensive and the output voltage is 220V or 380V. For non-electrical colleges and non-electrical major students, it is simply unable to bear the expensive financial burden and experimental safety requirements of non-electrical students.
发明内容Contents of the invention
本发明的目的在于提供一种经济安全的并网光伏发电系统教学实验装置，克服目前用于光伏发电系统的教学实验的各种实训平台结构复杂、价格高和安全性差、无法在实际教学实验和科研中得到广泛推广的缺点。The purpose of the present invention is to provide an economical and safe grid-connected photovoltaic power generation system teaching experiment device, to overcome the complex structure, high price and poor safety of various training platforms currently used for teaching experiments on photovoltaic power generation systems, which cannot be used in actual teaching experiments. and shortcomings that are widely promoted in scientific research.
本发明采用以下技术方案实现上述目的。并网光伏发电系统教学实验装置，包括并网光伏发电系统和交流电网模拟系统，并网光伏发电系统包括小功率光伏阵列和并网光伏逆变器，且小功率光伏阵列通过DC BUS（直流母线）与并网光伏逆变器连接；交流电网模拟系统由变频调速器、GCU（励磁调节器）、汽车发电机和交流负载装置组成，汽车发电机连接有变频调速器和GCU，汽车发电机通过AC BUS（交流母线）分别与并网光伏逆变器和交流负载装置连接。The present invention adopts the following technical solutions to achieve the above objects. The grid-connected photovoltaic power generation system teaching experimental device includes a grid-connected photovoltaic power generation system and an AC power grid simulation system. The grid-connected photovoltaic power generation system includes a small-power photovoltaic array and a grid-connected photovoltaic inverter, and the small-power photovoltaic array passes through the DC BUS (DC bus). ) is connected to the grid-connected photovoltaic inverter; the AC grid simulation system consists of a frequency converter, GCU (excitation regulator), automobile generator and AC load device. The automobile generator is connected to the frequency converter and GCU, and the automobile generates electricity The machine is connected to the grid-connected photovoltaic inverter and AC load device through AC BUS (AC bus).
进一步，所述并网光伏逆变器包括直流升压DCDC、解耦电容、三相逆变桥、交流滤波器、DCPWM驱动电路、AC/DCPWM驱动电路和MCU（中央控制器）；小功率光伏阵列11分别通过输入端的电压传感器和电流传感器依次连接直流升压DCDC、解耦电容、三相逆变桥和交流滤波器；交流滤波器与输出端的电压传感器和电流传感器连接；输入端的电压传感器和电流传感器通过输入电压电流检测装置连接MCU，输出端的电压传感器和电流传感器通过输出电压电流检测装置连接MCU；MCU中的PWM口Ⅰ通过DCPWM驱动电路连接直流升压DCDC；MCU中的PWM口Ⅱ通过AC/DCPWM驱动电路连接三相逆变桥；IPC通过RS485口连接MCU。Further, the grid-connected photovoltaic inverter includes DC boost DCDC, decoupling capacitor, three-phase inverter bridge, AC filter, DCPWM drive circuit, AC/DCPWM drive circuit and MCU (central controller); low-power photovoltaic Array 11 is connected to the DC boost DCDC, decoupling capacitor, three-phase inverter bridge and AC filter in sequence through the voltage sensor and current sensor at the input end; the AC filter is connected to the voltage sensor and current sensor at the output end; the voltage sensor at the input end and The current sensor is connected to the MCU through the input voltage and current detection device, and the voltage sensor and current sensor at the output end are connected to the MCU through the output voltage and current detection device; the PWM port I in the MCU is connected to the DC boost DCDC through the DCPWM drive circuit; the PWM port II in the MCU is connected through The AC/DCPWM drive circuit is connected to the three-phase inverter bridge; the IPC is connected to the MCU through the RS485 port.
变频调速器是驱动和控制发电机的速度，让发电机发出50Hz的交流电以模拟实际电网的频率；GCU主要是控制汽车发电机的励磁，目的是控制汽车发电机输出的三相电的电压幅值，汽车发电机在变频调速器的驱动和GCU的共同控制下发出相电压为22V，频率为50Hz的三相交流电，以模拟实际相电压220V，频率为50Hz的三相交流电网。The frequency converter drives and controls the speed of the generator, allowing the generator to emit 50Hz alternating current to simulate the frequency of the actual power grid; the GCU mainly controls the excitation of the car generator, with the purpose of controlling the voltage of the three-phase electricity output by the car generator. Amplitude, the car generator emits a three-phase AC power with a phase voltage of 22V and a frequency of 50Hz under the drive of the frequency converter and the joint control of the GCU to simulate the actual three-phase AC power grid with a phase voltage of 220V and a frequency of 50Hz.
本发明解决了传统并网光伏发电系统教学实验平台和实训平台结构复杂、价格昂贵、安全性差等难题，利用高精度低成本的TMS320LF2407芯片作为中央控制器，可以完成复杂的MPPT控制算法、正弦脉宽调制脉冲生成算法以及同步并网控制算法等，可完全模拟并网光伏发电系统在不同运行条件下的发电控制算法验证和测试性能要求。通过还原和模拟并网光伏发电系统在不同环境条件下运行状态和控制算法验证和测试，从而为光伏发电系统优化控制、MPPT的跟踪和可靠性分析教学实验研究提供平台和依据。而且本发明的并网光伏发电教学实验装置，投资最多也仅为传统并网光伏实验平台和实训平台研发费用的十五分之一左右，运行费用低且安全可靠，满足了高校和科研院所对并网光伏发电教学实验的经济性和安全性要求。The invention solves the problems of the traditional grid-connected photovoltaic power generation system teaching experiment platform and training platform with complex structure, high price, and poor safety. It uses the high-precision and low-cost TMS320LF2407 chip as the central controller to complete complex MPPT control algorithms, sine The pulse width modulation pulse generation algorithm and the synchronous grid-connected control algorithm can completely simulate the power generation control algorithm verification and test performance requirements of the grid-connected photovoltaic power generation system under different operating conditions. By restoring and simulating the operating status and control algorithm verification and testing of grid-connected photovoltaic power generation systems under different environmental conditions, it provides a platform and basis for teaching and experimental research on photovoltaic power generation system optimization control, MPPT tracking and reliability analysis. Moreover, the investment for the grid-connected photovoltaic power generation teaching experimental device of the present invention is only about one-fifteenth of the R&D cost of the traditional grid-connected photovoltaic experimental platform and practical training platform at most. The operating cost is low and it is safe and reliable, which satisfies the requirements of universities and scientific research institutes. Economic and safety requirements for grid-connected photovoltaic power generation teaching experiments.
附图说明Description of drawings
图1是本发明的整体结构示意图；Figure 1 is a schematic diagram of the overall structure of the present invention;
图2是本发明中并网光伏逆变器12的系统示意图。Figure 2 is a system schematic diagram of the grid-connected photovoltaic inverter 12 in the present invention.
具体实施方式Detailed ways
以下结合附图和具体实施例对本发明作进一步说明。参见图1和图2，并网光伏发电系统教学实验装置，包括并网光伏发电系统1和交流电网模拟系统2，其特征在于：并网光伏发电系统1包括小功率光伏阵列（太阳能电池板）11和并网光伏逆变器12，且小功率光伏阵列（太阳能电池板）11通过DC BUS（直流母线）与并网光伏逆变器12连接，并网光伏逆变器12将光伏阵列输出的0-34V直流电压在MCU 111的控制下，经过直流升压DCDC102、解耦电容103、三相逆变桥104以及交流滤波器105后输出22V的三相交流电，其实现光伏发电的逆变功能；交流电网模拟系统2由变频调速器21、GCU（励磁调节器）23、汽车发电机22和交流负载装置24组成，汽车发电机22连接有变频调速器21和GCU 23，汽车发电机22通过AC BUS（交流母线）分别与并网光伏逆变器12和交流负载装置24连接；变频调速器21是驱动和控制发电机的速度，让发电机发出50Hz的交流电以模拟实际电网的频率；GCU 23主要是控制汽车发电机的励磁，目的是控制汽车发电机输出的三相电的电压幅值，汽车发电机22在变频调速器21的驱动和GCU 23的共同控制下发出相电压为22V，频率为50Hz的三相交流电，以模拟实际相电压220V，频率为50Hz的三相交流电网；The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Referring to Figures 1 and 2, the grid-connected photovoltaic power generation system teaching experimental device includes a grid-connected photovoltaic power generation system 1 and an AC power grid simulation system 2. It is characterized in that: the grid-connected photovoltaic power generation system 1 includes a small-power photovoltaic array (solar panel) 11 and the grid-connected photovoltaic inverter 12, and the small-power photovoltaic array (solar panel) 11 is connected to the grid-connected photovoltaic inverter 12 through DC BUS (DC bus), and the grid-connected photovoltaic inverter 12 converts the photovoltaic array output Under the control of MCU 111, the 0-34V DC voltage outputs 22V three-phase AC power after passing through DC boost DCDC102, decoupling capacitor 103, three-phase inverter bridge 104 and AC filter 105, which realizes the inverter function of photovoltaic power generation. ; The AC power grid simulation system 2 is composed of a frequency converter 21, a GCU (excitation regulator) 23, a car generator 22 and an AC load device 24. The car generator 22 is connected to the frequency converter 21 and the GCU 23. The car generator 22 is connected to the grid-connected photovoltaic inverter 12 and AC load device 24 respectively through AC BUS (AC bus); the variable frequency speed regulator 21 drives and controls the speed of the generator, allowing the generator to emit 50Hz AC power to simulate the actual power grid. frequency; GCU 23 mainly controls the excitation of the automobile generator, with the purpose of controlling the voltage amplitude of the three-phase electricity output by the automobile generator. The automobile generator 22 emits phase voltage under the drive of the frequency converter 21 and the joint control of the GCU 23 A three-phase AC power grid with a voltage of 22V and a frequency of 50Hz is used to simulate a three-phase AC power grid with an actual phase voltage of 220V and a frequency of 50Hz;
（如图2所示）所述并网光伏逆变器12包括直流升压DCDC102、解耦电容103、三相逆变桥104、交流滤波器105、DCPWM驱动电路108、AC/DCPWM驱动电路109和MCU（TMS320LF2407中央控制器）111；小功率光伏阵列（太阳能电池板）11分别通过输入端的电压传感器101和电流传感器100依次连接直流升压DCDC102、解耦电容103、三相逆变桥104和交流滤波器105；交流滤波器105与输出端的电压传感器101和电流传感器100连接；输入端的电压传感器101和电流传感器100通过输入电压电流检测装置106连接MCU 111，输出端的电压传感器101和电流传感器100通过输出电压电流检测装置107连接MCU 111；MCU 111中的PWM口Ⅰ通过DCPWM驱动电路108连接直流升压DCDC102；MCU 111中的PWM口Ⅱ通过AC/DCPWM驱动电路109连接三相逆变桥104；IPC 110（后台监控计算机）通过RS485口连接MCU 111。后台监控计算机IPC 110安装有VB6.0开发的并网光伏发电系统监控软件V2.1，该软件负责显示由MCU111通过RS485口传来的光伏发电系统实时运行参数，如：并网电流、电压、频率、有功功率、无功功率等各种运行参数。(As shown in Figure 2) The grid-connected photovoltaic inverter 12 includes DC boost DCDC102, decoupling capacitor 103, three-phase inverter bridge 104, AC filter 105, DCPWM drive circuit 108, AC/DCPWM drive circuit 109 and MCU (TMS320LF2407 central controller) 111; the low-power photovoltaic array (solar panel) 11 is connected to the DC boost DCDC 102, decoupling capacitor 103, three-phase inverter bridge 104 and AC filter 105; AC filter 105 is connected to the voltage sensor 101 and current sensor 100 at the output end; the voltage sensor 101 and current sensor 100 at the input end are connected to the MCU 111 through the input voltage and current detection device 106, and the voltage sensor 101 and current sensor 100 at the output end are connected The MCU 111 is connected through the output voltage and current detection device 107; the PWM port I in the MCU 111 is connected to the DC boost DCDC 102 through the DCPWM drive circuit 108; the PWM port II in the MCU 111 is connected to the three-phase inverter bridge 104 through the AC/DCPWM drive circuit 109 ;IPC 110 (backend monitoring computer) is connected to MCU 111 through RS485 port. The background monitoring computer IPC 110 is installed with the grid-connected photovoltaic power generation system monitoring software V2.1 developed by VB6.0. This software is responsible for displaying the real-time operating parameters of the photovoltaic power generation system transmitted by the MCU111 through the RS485 port, such as: grid-connected current, voltage, frequency , active power, reactive power and other operating parameters.
所述直流升压DCDC102将小功率光伏阵列11输出的0-34V变化的直流电压升压并稳定为36V直流电压；所述解耦电容103是实现直流和交流电压的解耦，便于交直流控制；所述三相逆变桥104是将直流电压逆变为所需要的三相交流电；所述交流滤波器105实现交流滤波功能，将三相逆变桥104输出的工频以外的交流电滤除；所述输入、输出电压传感器101和输入、直流升压DCDC102分别采样输入交流电压电流和输出直流电压电流的参数，并送至MCU（TMS320LF2407中央控制器）111实现实时控制；DCPWM驱动电路108、DC/ACPWM驱动电路109实现对MCU 111输出信号的放大然后分别控制直流升压DCDC102和三相逆变桥104；MCU111实现高性能复杂控制算法。具体电路连接为：小功率光伏阵列11输出的0-34V变化的直流电压作为并网逆变器的DC（直流）输入电压,其直接和直流升压DCDC102连接，同时其也与电压传感器101和直流升压DCDC102相连，目的是测量输入直流电压和电流大小；直流升压DCDC102也同时和DCPWM驱动电路108和解耦电容103相连，直流升压DCDC102在DCPWM驱动电路108的控制下输出直流电压约为36V，该电压经过解耦电容103稳压后再连接到三相逆变桥104，三相逆变桥104也同时和DC/ACPWM驱动电路109相连，在DC/ACPWM驱动电路109的控制下三相逆变桥104输出较稳定三相交流电压，三相逆变桥104输出连接到交流滤波器105，经过其滤波之后输出标准50Hz的稳定三相正弦波电压，后台监控计算机IPC110通过RS485口和MCU（TMS320LF2407）111中央控制器相连，实现实时通讯，记录和显示各种控制参数。The DC boost DCDC 102 boosts and stabilizes the DC voltage varying from 0-34V output by the low-power photovoltaic array 11 to 36V DC voltage; the decoupling capacitor 103 realizes the decoupling of DC and AC voltages to facilitate AC and DC control. ; The three-phase inverter bridge 104 inverts the DC voltage into the required three-phase alternating current; the AC filter 105 implements an AC filtering function and filters out the AC power other than the power frequency output by the three-phase inverter bridge 104 ; The input and output voltage sensors 101 and the input and DC boost DCDC 102 respectively sample the parameters of the input AC voltage and current and the output DC voltage and current, and send them to the MCU (TMS320LF2407 central controller) 111 for real-time control; DCPWM drive circuit 108, The DC/ACPWM drive circuit 109 amplifies the output signal of the MCU 111 and then controls the DC boost DCDC 102 and the three-phase inverter bridge 104 respectively; the MCU 111 implements a high-performance complex control algorithm. The specific circuit connection is: the 0-34V varying DC voltage output by the low-power photovoltaic array 11 is used as the DC (direct current) input voltage of the grid-connected inverter, which is directly connected to the DC boost DCDC102, and is also connected to the voltage sensor 101 and The DC boost DCDC102 is connected to measure the input DC voltage and current; the DC boost DCDC102 is also connected to the DCPWM drive circuit 108 and the decoupling capacitor 103. The DC boost DCDC102 outputs a DC voltage of about is 36V. This voltage is stabilized by the decoupling capacitor 103 and then connected to the three-phase inverter bridge 104. The three-phase inverter bridge 104 is also connected to the DC/ACPWM drive circuit 109. Under the control of the DC/ACPWM drive circuit 109 The three-phase inverter bridge 104 outputs a relatively stable three-phase AC voltage. The output of the three-phase inverter bridge 104 is connected to the AC filter 105. After filtering, it outputs a standard 50Hz stable three-phase sine wave voltage. The background monitoring computer IPC110 passes the RS485 port. Connected to the MCU (TMS320LF2407) 111 central controller to achieve real-time communication, record and display various control parameters.
为了有效地实现并网光伏发电系统的经济性、可靠性和安全性，本装置采用低成本的小功率光伏阵列11作为输入，直流升压DCDC102和三相逆变桥104均采用低功耗、低价格的高频MOS管，MCU（TMS320LF2407）111中央处理器采用低成本的TI公司的TMS320LF2407芯片；交流电网模拟系统2模拟电网采用由低成本的汽车发电机改造而成三相21V交流电网，频率50Hz。本发明的教学实验装置不仅有较高的静态精度，还要有良好的动态特性，能够完全实现光伏发电系统的智能控制各种控制算法和原理，同时也考虑学生实验的人身安全性和设备的安全性，为教学实验研究和开发高性能的光伏发电优化控制算法提供必要的测试手段和相应的低成本硬件实验装置。In order to effectively realize the economy, reliability and safety of the grid-connected photovoltaic power generation system, this device uses a low-cost low-power photovoltaic array 11 as the input, and the DC boost DCDC102 and the three-phase inverter bridge 104 adopt low-power, Low-priced high-frequency MOS tube, MCU (TMS320LF2407) 111 central processor adopts low-cost TI company's TMS320LF2407 chip; AC power grid simulation system 2 simulates the power grid using a three-phase 21V AC power grid transformed from a low-cost automobile generator. Frequency 50Hz. The teaching experiment device of the present invention not only has high static accuracy, but also has good dynamic characteristics, can fully realize various control algorithms and principles of intelligent control of the photovoltaic power generation system, and also considers the personal safety of students in experiments and the safety of equipment. Safety, providing necessary testing methods and corresponding low-cost hardware experimental devices for teaching experimental research and development of high-performance photovoltaic power generation optimization control algorithms.
小功率光伏阵列（太阳能电池板）11作为光伏发电系统的直流电源，其输出电压和电流随着光强和环境温度的变化而变化，其输出的电压范围为0-34V；并网光伏逆变器12由直流升压DCDC102、解耦电容103、三相逆变桥104和交流滤波器105组成，直流升压DCDC102在由集成在TMS320LF2407中的PID控制算法产生的频率为10KHz的脉宽调制信号的控制下，将小功率光伏阵列11输出的0-34V的变化直流电压升压到稳定的36V直流电，再通过解耦电容后供给交流滤波器105逆变，本级同时实现最大功率点跟踪（MPPT）；交流滤波器105的功能是实现将稳定的36V直流电转化为相电压为22V的三相正弦交流电，具体实现过程是中央处理器TMS320LF2407实时跟踪直流母线电压大小和电网频率，再根据建立在TMS320LF2407中的正弦脉宽调制控制算法，产生相应占空比的六路脉宽调制信号，经过脉冲DC/ACPWM驱动电路109后驱动交流滤波器105，三相逆变桥104输出经过交流滤波器105后，使三相逆变桥104输出与模拟电网同步的三相正弦电流。从小功率光伏阵列11产生的0-34VDC作为输入到最后相对稳定的三相交流电输出，整个功率转换电路以及控制电路的硬件架构简单、经济和可靠。The low-power photovoltaic array (solar panel) 11 serves as the DC power supply of the photovoltaic power generation system. Its output voltage and current change with changes in light intensity and ambient temperature. Its output voltage range is 0-34V; grid-connected photovoltaic inverter The device 12 is composed of a DC boost DCDC102, a decoupling capacitor 103, a three-phase inverter bridge 104 and an AC filter 105. The DC boost DCDC102 generates a pulse width modulation signal with a frequency of 10KHz generated by the PID control algorithm integrated in TMS320LF2407. Under the control of the low-power photovoltaic array 11, the varying DC voltage of 0-34V output by the low-power photovoltaic array 11 is boosted to a stable 36V DC, and then supplied to the AC filter 105 for inversion through the decoupling capacitor. This stage simultaneously achieves maximum power point tracking ( MPPT); the function of the AC filter 105 is to convert stable 36V DC power into a three-phase sinusoidal AC power with a phase voltage of 22V. The specific implementation process is that the central processor TMS320LF2407 tracks the DC bus voltage and grid frequency in real time, and then based on the established The sinusoidal pulse width modulation control algorithm in TMS320LF2407 generates six pulse width modulation signals with corresponding duty cycles, which drive the AC filter 105 after passing through the pulse DC/ACPWM drive circuit 109. The output of the three-phase inverter bridge 104 passes through the AC filter 105. , causing the three-phase inverter bridge 104 to output a three-phase sinusoidal current synchronized with the simulated power grid. From the 0-34VDC generated by the small-power photovoltaic array 11 as input to the final relatively stable three-phase AC output, the hardware structure of the entire power conversion circuit and control circuit is simple, economical and reliable.
实验装置中的MCU（TMS320LF2407）111中央控制器完成对输出交流电压、电流、输入直流电压的检测和转换，实时检测和计算小功率光伏阵列11输入功率和并网的输出功率，根据在MCU（TMS320LF2407）111中央控制器内部建立的最大功率点算法（MPPT）模型和正弦脉宽调制算法模型，再通过模糊PID控制算法对误差和误差变化率进行智能模糊运算，实时计算出PWM的占空比，将输出的带有相应占空比的控制信号经过DCPWM驱动电路108,DC/ACPWM驱动电路109放大后分别驱动直流升压DCDC102和三相逆变桥104，使三相逆变桥104输出高质量的三相正弦波电流，同时实现最大功率点跟踪，具体电路结构实现如图2。The MCU (TMS320LF2407) 111 central controller in the experimental device completes the detection and conversion of the output AC voltage, current, and input DC voltage, and detects and calculates the input power of the small-power photovoltaic array 11 and the grid-connected output power in real time. According to the MCU ( TMS320LF2407) 111 central controller establishes the maximum power point algorithm (MPPT) model and sinusoidal pulse width modulation algorithm model, and then uses the fuzzy PID control algorithm to perform intelligent fuzzy operations on the error and error change rate to calculate the PWM duty cycle in real time , the output control signal with the corresponding duty cycle is amplified by the DCPWM drive circuit 108 and the DC/ACPWM drive circuit 109 and then drives the DC boost DCDC 102 and the three-phase inverter bridge 104 respectively, so that the three-phase inverter bridge 104 outputs high Quality three-phase sine wave current, while achieving maximum power point tracking, the specific circuit structure is shown in Figure 2.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362371.8A CN106952547B (en) | 2017-05-22 | 2017-05-22 | Grid-connected photovoltaic power generation teaching experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362371.8A CN106952547B (en) | 2017-05-22 | 2017-05-22 | Grid-connected photovoltaic power generation teaching experimental device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106952547A CN106952547A (en) | 2017-07-14 |
| CN106952547B true CN106952547B (en) | 2023-11-03 |
Family
ID=59479915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710362371.8A Active CN106952547B (en) | 2017-05-22 | 2017-05-22 | Grid-connected photovoltaic power generation teaching experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106952547B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887930B (en) * | 2017-12-22 | 2024-07-02 | 蒙城县梦蝶建筑工程有限公司 | Grid-connected inverter circuit for generating power under weak light condition of photovoltaic inverter |
| CN109949672A (en) * | 2019-04-29 | 2019-06-28 | 南昌航空大学 | Photovoltaic array simulator teaching experimental device |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185508A (en) * | 2011-05-23 | 2011-09-14 | 南昌航空大学 | Pulse-width modulation (PWM) inverted power supply system and algorithm based on fuzzy predictive control technology |
| CN102185513A (en) * | 2011-05-18 | 2011-09-14 | 华北电力大学（保定） | Parallel structure and control method for photovoltaic power generation grid-connected inverter |
| CN102403920A (en) * | 2011-11-16 | 2012-04-04 | 广东易事特电源股份有限公司 | Three-level half-bridge photovoltaic grid connected inverter |
| CN102522773A (en) * | 2011-12-14 | 2012-06-27 | 上海信元瑞电气有限公司 | Generating set control system used for power system dynamic simulation experiment |
| CN102610146A (en) * | 2012-03-06 | 2012-07-25 | 江苏大学 | Teaching experiment platform of multifunctional photovoltaic power generation system |
| CN202650411U (en) * | 2012-07-03 | 2013-01-02 | 浙江天煌科技实业有限公司 | Wind and light complementary generation training system used for teaching |
| EP2568594A1 (en) * | 2011-09-12 | 2013-03-13 | Green Power Technologies, S.L. | DC time-multiplexed power converter and its modulation technique |
| KR101248593B1 (en) * | 2013-01-24 | 2013-04-03 | 주식회사 광명전기 | Photoelectric cell system with compensating wattless power and operating method of it |
| CN103312140A (en) * | 2013-06-07 | 2013-09-18 | 南京航空航天大学 | Starting method of multi-branch two-stage three-phase photovoltaic grid-connected inverter |
| CN203218892U (en) * | 2013-04-21 | 2013-09-25 | 胥明军 | A controller for photovoltaic auxiliary grid-connected power generation and a power generation system using it |
| CN203466578U (en) * | 2013-09-13 | 2014-03-05 | 湖南大学 | 10kW wind-solar complementary experiment system |
| CN104348181A (en) * | 2013-07-26 | 2015-02-11 | 国电新能源技术研究院 | Highly efficient photovoltaic distributed power generation system |
| CN105245126A (en) * | 2015-10-22 | 2016-01-13 | 江苏绿扬电子仪器集团有限公司 | Teaching inverter system module |
| CN205753448U (en) * | 2016-06-29 | 2016-11-30 | 国网山东省电力公司阳谷县供电公司 | A photovoltaic grid-connected power generation system |
| CN207425183U (en) * | 2017-05-22 | 2018-05-29 | 南昌航空大学 | Grid-connected photovoltaic power generation experiment device for teaching |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7479774B2 (en) * | 2006-04-07 | 2009-01-20 | Yuan Ze University | High-performance solar photovoltaic (PV) energy conversion system |
| US10122178B2 (en) * | 2011-04-15 | 2018-11-06 | Deka Products Limited Partnership | Modular power conversion system |
-
2017
- 2017-05-22 CN CN201710362371.8A patent/CN106952547B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185513A (en) * | 2011-05-18 | 2011-09-14 | 华北电力大学（保定） | Parallel structure and control method for photovoltaic power generation grid-connected inverter |
| CN102185508A (en) * | 2011-05-23 | 2011-09-14 | 南昌航空大学 | Pulse-width modulation (PWM) inverted power supply system and algorithm based on fuzzy predictive control technology |
| EP2568594A1 (en) * | 2011-09-12 | 2013-03-13 | Green Power Technologies, S.L. | DC time-multiplexed power converter and its modulation technique |
| CN102403920A (en) * | 2011-11-16 | 2012-04-04 | 广东易事特电源股份有限公司 | Three-level half-bridge photovoltaic grid connected inverter |
| CN102522773A (en) * | 2011-12-14 | 2012-06-27 | 上海信元瑞电气有限公司 | Generating set control system used for power system dynamic simulation experiment |
| CN102610146A (en) * | 2012-03-06 | 2012-07-25 | 江苏大学 | Teaching experiment platform of multifunctional photovoltaic power generation system |
| CN202650411U (en) * | 2012-07-03 | 2013-01-02 | 浙江天煌科技实业有限公司 | Wind and light complementary generation training system used for teaching |
| KR101248593B1 (en) * | 2013-01-24 | 2013-04-03 | 주식회사 광명전기 | Photoelectric cell system with compensating wattless power and operating method of it |
| CN203218892U (en) * | 2013-04-21 | 2013-09-25 | 胥明军 | A controller for photovoltaic auxiliary grid-connected power generation and a power generation system using it |
| CN103312140A (en) * | 2013-06-07 | 2013-09-18 | 南京航空航天大学 | Starting method of multi-branch two-stage three-phase photovoltaic grid-connected inverter |
| CN104348181A (en) * | 2013-07-26 | 2015-02-11 | 国电新能源技术研究院 | Highly efficient photovoltaic distributed power generation system |
| CN203466578U (en) * | 2013-09-13 | 2014-03-05 | 湖南大学 | 10kW wind-solar complementary experiment system |
| CN105245126A (en) * | 2015-10-22 | 2016-01-13 | 江苏绿扬电子仪器集团有限公司 | Teaching inverter system module |
| CN205753448U (en) * | 2016-06-29 | 2016-11-30 | 国网山东省电力公司阳谷县供电公司 | A photovoltaic grid-connected power generation system |
| CN207425183U (en) * | 2017-05-22 | 2018-05-29 | 南昌航空大学 | Grid-connected photovoltaic power generation experiment device for teaching |
Non-Patent Citations (5)
| Title |
|---|
| 《3kW家用单相光伏并网逆变系统设计》;荆红莉等;《国外电子测量技术》;20161231;全文 * |
| 《Parameter Identification of Distributed Photovoltaic Power Generation System》;Fu Bing-bin等;《Proceedings of the CSU-EPSA》;20131231;全文 * |
| 《基于双DSP+FPGA的三相逆变器的设计与实现》;程若发等;《工业控制计算机》;20151231;全文 * |
| Real-time Simulation of Photovoltaic Generation System Based on dSPACE;Xiaobo YANG;《International Power, Electronics and Materials Engineering Conference》;第741-752页，图1-3 * |
| 基于Boost隔离升压拓扑的光伏直流并网变流器的设计与实现;鞠昌斌 等;《太阳能学报》;第37卷(第3期);第752-758页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106952547A (en) | 2017-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107230983B (en) | A power spring application system based on power control and its control method | |
| CN207021912U (en) | Multiple-channel output random waveform voltage source system | |
| CN104834791A (en) | Parallel real-time simulation method for photovoltaic power generation system | |
| CN101388637A (en) | Dual feed-back wind power generator robust controlling method having feed-forward compensation | |
| CN106503371A (en) | A kind of power hardware that improves is in ring hybrid real-time simulation stability of a system method | |
| CN106950512B (en) | Energy storage converter grid-connected and grid-disconnected characteristic integrated detection system and method | |
| CN104836464A (en) | Neutral-point-potential balance control device and method for direct current side of VIENNA rectifier | |
| CN102005762B (en) | Direct current voltage on-line identification method for active filter | |
| CN105182791A (en) | RTDS-based digital-physical hybrid simulation system of photovoltaic power generation system | |
| CN106952547B (en) | Grid-connected photovoltaic power generation teaching experimental device | |
| CN104166063A (en) | Feedback type alternating-current electronic load used for frequency converter aging test | |
| CN107565702B (en) | A static simulation method of dynamic wireless power supply based on the equivalent open-circuit voltage of the receiver | |
| CN103337208A (en) | Wind power generator set simulation system based on electric power electronic technology, and simulation method | |
| CN201188128Y (en) | Automatization system for debugging and checking electronic type electric energy meter | |
| CN103996338B (en) | Intelligent open type multifunctional Power Electronic Experimentation device | |
| CN103391073A (en) | Signal generator based on SPMW (sinusoidal pulse width modulation) | |
| CN104852616A (en) | Power grid simulator with line impedance simulation function, and control method | |
| CN207425183U (en) | Grid-connected photovoltaic power generation experiment device for teaching | |
| CN201141903Y (en) | Substation three-phase flow simulation load tester | |
| CN102842919A (en) | Flexible control method for photovoltaic grid-connected power generating system | |
| CN104764958A (en) | Testing system of power quality control equipment | |
| CN210574569U (en) | Teaching experiment device for photovoltaic array simulator | |
| CN110632532B (en) | Test system and method for meeting parallel operation of multiple groups of serial photovoltaic inverters | |
| CN203387198U (en) | SOPC based photovoltaic grid-connected device | |
| CN202818132U (en) | Solar battery simulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |