CN204243785U - A distributed photovoltaic power generation microgrid system - Google Patents
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Abstract
Description
技术领域technical field
本实用新型涉及光伏发电技术，具体是涉及一种分布式光伏发电微网系统。The utility model relates to photovoltaic power generation technology, in particular to a distributed photovoltaic power generation micro-grid system.
背景技术Background technique
化石能源(石油、天然气、煤炭等)是目前全球消耗的最主要能源，但随着人类的不断开采，化石能源的储量不断减少，并且，大部分化石能源在本世纪将被开采殆尽。另外，由于化石能源的使用过程中会新增大量温室气体CO2，同时可能产能一些有污染的烟气，威胁全球生态环境。因而，开发更清洁的可再生能源(水电、风电、太阳能、生物能、潮汐能等)是今后能源开采利用的发展方向。Fossil energy (oil, natural gas, coal, etc.) is currently the most important energy consumed in the world, but with the continuous exploitation of human beings, the reserves of fossil energy continue to decrease, and most of the fossil energy will be exhausted in this century. In addition, due to the use of fossil energy, a large amount of greenhouse gas CO2 will be added, and some polluting flue gas may be produced at the same time, threatening the global ecological environment. Therefore, the development of cleaner renewable energy sources (hydropower, wind power, solar energy, biomass energy, tidal energy, etc.) is the development direction of energy exploitation and utilization in the future.
太阳能是一种利用太阳光辐射能量的可再生能源，分布式光伏发电特指采用光伏组件，将太阳能直接转换为电能的分布式发电系统。它是一种新型的、具有广阔发展前景的发电和能源综合利用方式。Solar energy is a renewable energy that utilizes sunlight radiation energy. Distributed photovoltaic power generation specifically refers to a distributed power generation system that uses photovoltaic modules to directly convert solar energy into electrical energy. It is a new type of power generation and comprehensive utilization of energy with broad development prospects.
基于上述分布式光伏发电的分布式光伏发电微网是一种由负载和微电源及储能单元共同组成的有机系统。分布式光伏发电微网主要通过电力电子技术实现能量的转换及控制。相对于电力系统(主电网),分布式光伏发电微网是系统中的一个可控单元，它可以在短时间内作出响应以满足外部主电网的需要；而对于用户，分布式光伏发电微网可以满足本地负载的特定电能质量要求，并可提高供电可靠性、降低线损等。The distributed photovoltaic power generation microgrid based on the above distributed photovoltaic power generation is an organic system composed of loads, micro power sources and energy storage units. The distributed photovoltaic power generation microgrid mainly realizes energy conversion and control through power electronic technology. Compared with the power system (main grid), the distributed photovoltaic power generation microgrid is a controllable unit in the system, which can respond in a short time to meet the needs of the external main grid; and for users, the distributed photovoltaic power generation microgrid It can meet the specific power quality requirements of local loads, improve power supply reliability, reduce line loss, etc.
分布式光伏发电微网有两种基本的运行方式，即并网运行和独立运行。在分布式光伏发电微网与主电网并网运行时，负载可以从分布式光伏发电微网或者公共电网得到电力供应。当日照充沛，光伏发电电力足够时尽可能使用光伏发电，此时电网为辅；当日照弱时就以使用主电网为主。当主电网发生各种故障、扰动或电能质量不满足负载要求时，分布式光伏发电微网将快速与主电网断开并且平滑过渡到独立运行，由分布式光伏发电微网自身向负载独立供电以确保负载不受影响。Distributed photovoltaic power generation microgrid has two basic operation modes, namely grid-connected operation and independent operation. When the distributed photovoltaic power generation microgrid is connected to the main grid, the load can be supplied with electricity from the distributed photovoltaic power generation microgrid or the public grid. When the sunshine is abundant and the photovoltaic power generation is sufficient, photovoltaic power generation is used as much as possible, and the power grid is supplemented at this time; when the sunshine is weak, the main power grid is mainly used. When various faults, disturbances or power quality do not meet the load requirements on the main grid, the distributed photovoltaic power generation microgrid will quickly disconnect from the main grid and smoothly transition to independent operation, and the distributed photovoltaic power generation microgrid itself will supply power to the load independently Make sure the load is not affected.
由于目前常见的分布式光伏发电微网一般都设置在户外，对于如海岛、荒漠、草原、高山等较偏远及地质条件较差的地域，分布式光伏发电微网系统限于环境约束，使得光伏发电站和负载的相距相对较远，这就需要延长传输电缆，但是，增加传输电缆会带来较大的线路损耗，电能传输效率低，因此难以满足负载的用电需求。Since the current common distributed photovoltaic power generation microgrids are generally set up outdoors, for remote and poor geological conditions such as islands, deserts, grasslands, and mountains, the distributed photovoltaic power generation microgrid system is limited by environmental constraints, making photovoltaic power generation The distance between the station and the load is relatively far, which requires extending the transmission cable. However, increasing the transmission cable will bring large line loss and low power transmission efficiency, so it is difficult to meet the power demand of the load.
实用新型内容Utility model content
为了解决上述问题，本实用新型的目的在于提供一种分布式光伏发电微网系统。In order to solve the above problems, the purpose of this utility model is to provide a distributed photovoltaic power generation micro-grid system.
为了达到上述目的，本实用新型采用了以下技术方案：In order to achieve the above object, the utility model adopts the following technical solutions:
一种分布式光伏发电微网系统，具有这样的特征，包括：光伏电池组件方阵，用于将接收的太阳能转换为电能并以直流电方式输出；和控制装置，将光伏电池组件方阵输出的直流电转换为交流电后输送至外部负载或公共电网；其中，光伏电池组件方阵包含若干个并联的光伏电池子方阵；控制装置包含：若干个与光伏电池子方阵相一一对应的直流防雷汇流柜，与每个直流防雷汇流柜输出端相连接的光伏控制器，与光伏控制器相连接用于储存电能的蓄电池组，与光伏控制器输出端连接的光伏逆变器，以及与光伏逆变器输出端连接的交流配电计量柜；每个光伏电池子方阵与每个直流防雷汇流柜之间均由直流电缆连接，交流配电计量柜与外部负载或公共电网之间由交流电缆连接。A distributed photovoltaic power generation micro-grid system has such features, including: a square array of photovoltaic cell components, which is used to convert received solar energy into electrical energy and output it in the form of direct current; and a control device for outputting the square array of photovoltaic cell components The direct current is converted into alternating current and then sent to the external load or the public grid; wherein, the photovoltaic cell module array includes several parallel photovoltaic cell sub-arrays; the control device includes: several DC anti-corrosion A lightning combiner cabinet, a photovoltaic controller connected to the output end of each DC lightning protection combiner cabinet, a battery pack connected to the photovoltaic controller for storing electric energy, a photovoltaic inverter connected to the output end of the photovoltaic controller, and a photovoltaic controller connected to the output end of the photovoltaic controller The AC power distribution metering cabinet connected to the output end of the photovoltaic inverter; each photovoltaic cell sub-array and each DC lightning protection confluence cabinet are connected by DC cables, and the AC power distribution metering cabinet and the external load or the public grid Connected by AC cable.
进一步地，在本实用新型提供的分布式光伏发电微网系统中，还可以具有这样的特征，控制装置还包括：与光伏控制器连接的通讯及环境控制柜，检测控制装置内、外部环境参数的环境监测单元，以及调节控制装置内部温度的温度调节单元。Further, in the distributed photovoltaic power generation micro-grid system provided by the utility model, it can also have such a feature that the control device also includes: a communication and environmental control cabinet connected to the photovoltaic controller, and detects the internal and external environmental parameters of the control device An environmental monitoring unit, and a thermoregulation unit that regulates the temperature inside the control unit.
进一步地，在本实用新型提供的分布式光伏发电微网系统中，还可以具有这样的特征，环境监测单元集成有：环境检测仪，摄像头，以及智能光电感烟探测器。Furthermore, in the distributed photovoltaic power generation micro-grid system provided by the present invention, it may also have such a feature that the environmental monitoring unit is integrated with: an environmental detector, a camera, and an intelligent photoelectric smoke detector.
进一步地，在本实用新型提供的分布式光伏发电微网系统中，还可以具有这样的特征，温度调节单元包含：若干个加热板和若干个散热风机。Furthermore, in the distributed photovoltaic power generation micro-grid system provided by the utility model, it may also have such a feature that the temperature adjustment unit includes: several heating plates and several cooling fans.
进一步地，在本实用新型提供的分布式光伏发电微网系统中，还可以具有这样的特征，直流防雷汇流柜集成有：直流熔断器，直流断路器，运行状态实时监测模块，以及防雷模块。Furthermore, in the distributed photovoltaic power generation micro-grid system provided by the utility model, it can also have such a feature that the DC lightning protection confluence cabinet is integrated with: DC fuses, DC circuit breakers, real-time monitoring modules for operating status, and lightning protection module.
本实用新型在上述基础上具有的积极效果是：The positive effect that the utility model has on the above-mentioned basis is:
本实用新型提供的分布式光伏发电微网系统具有一体化结构，采用直流电缆就近连接光伏电池组件方阵和控制装置，并且，由交流电缆将控制装置就近连接到负载或公共电网，便于在较偏远或地质条件较差的地域就近设置，以减少电力传输距离，从而降低线路损耗，提高电能传输效率，满足负载的用电需求。The distributed photovoltaic power generation micro-grid system provided by the utility model has an integrated structure, and a DC cable is used to connect the photovoltaic cell module square array and the control device nearby, and the control device is connected to the load or the public power grid nearby by the AC cable, which is convenient in a relatively short time. Remote or poor geological conditions are set nearby to reduce the power transmission distance, thereby reducing line loss, improving power transmission efficiency, and meeting the power demand of the load.
附图说明Description of drawings
图1为本实用新型的实施例中分布式光伏发电微网系统的结构示意图。Fig. 1 is a schematic structural diagram of a distributed photovoltaic power generation microgrid system in an embodiment of the present invention.
具体实施方式detailed description
为了使本实用新型实现的技术手段、创作特征、达成目的与功效易于明白了解，以下实施例结合附图对本实用新型提供的分布式光伏发电微网系统作具体阐述。In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the following embodiments will specifically explain the distributed photovoltaic power generation micro-grid system provided by the utility model in conjunction with the accompanying drawings.
如图1所示，本实施例提供的分布式光伏发电微网系统包括光伏电池组件方阵1和控制装置2，光伏电池组件方阵1用于将接收的太阳能转换为电能并以直流电方式输出。控制装置2用于将光伏电池组件方阵1输出的直流电转换为交流电后输送至外部负载或公共电网。As shown in Figure 1, the distributed photovoltaic power generation micro-grid system provided by this embodiment includes a photovoltaic cell module array 1 and a control device 2, and the photovoltaic cell module array 1 is used to convert received solar energy into electrical energy and output it in the form of direct current . The control device 2 is used to convert the direct current outputted by the photovoltaic cell assembly square array 1 into an alternating current and then deliver it to an external load or a public power grid.
光伏电池组件方阵1包含若干个并联的光伏电池子方阵11，并且，每个光伏电池子方阵11均由若干个光伏电池面板串联组成。The photovoltaic cell component array 1 includes several parallel photovoltaic cell sub-arrays 11, and each photovoltaic cell sub-array 11 is composed of several photovoltaic cell panels connected in series.
控制装置2包含：若干个直流防雷汇流柜21，光伏控制器22，蓄电池组25，光伏逆变器23，交流配电计量柜24，通讯及环境控制柜26，环境监测单元27，以及温度调节单元28。The control device 2 includes: several DC lightning protection confluence cabinets 21, photovoltaic controller 22, battery pack 25, photovoltaic inverter 23, AC power distribution metering cabinet 24, communication and environmental control cabinet 26, environmental monitoring unit 27, and temperature Adjustment unit 28.
每个直流防雷汇流柜21分别与每个光伏电池子方阵相一一对应，具体的，每个光伏电池子方阵与每个直流防雷汇流柜21之间均由直流电缆连接。并且，若干个直流防雷汇流柜21的输出端采用并联的方式连接到光伏控制器22的输入端。Each DC lightning protection combiner cabinet 21 is in one-to-one correspondence with each photovoltaic cell sub-array. Specifically, each photovoltaic cell sub-array is connected to each DC lightning protection combiner cabinet 21 by a DC cable. Moreover, the output ends of several DC lightning protection combiner cabinets 21 are connected to the input ends of the photovoltaic controller 22 in parallel.
用于储存电能的蓄电池组25与光伏控制器22相连接，蓄电池组25储存有经直流防雷汇流柜21汇集的直流电能，在光照不足或无光照的状态下由蓄电池组25为负载提供或补充电能。The battery pack 25 used to store electric energy is connected to the photovoltaic controller 22, and the battery pack 25 stores the DC electric energy gathered by the DC lightning protection confluence cabinet 21, and the battery pack 25 provides or Supplementary power.
光伏控制器22的输出端连接光伏逆变器23，光伏逆变器23是一种由半导体器件组成的电力调整装置，用于将由光伏控制器22输出的直流电转换为交流电。本实施例中的光伏逆变器23由升压回路和逆变桥式回路构成。具体的，升压回路把光伏控制器22输出的直流电压升压到光伏逆变器23输出控制所需的直流电压；再由逆变桥式回路则把升压后的直流电压高效地转换成负载常用频率的交流电压。The output end of the photovoltaic controller 22 is connected to a photovoltaic inverter 23, which is a power adjustment device composed of semiconductor devices, and is used to convert the direct current output by the photovoltaic controller 22 into alternating current. The photovoltaic inverter 23 in this embodiment is composed of a boost circuit and an inverter bridge circuit. Specifically, the boost circuit boosts the DC voltage output by the photovoltaic controller 22 to the DC voltage required for the output control of the photovoltaic inverter 23; then the inverter bridge circuit efficiently converts the boosted DC voltage into AC voltage at the frequency normally used by the load.
交流配电计量柜24与光伏逆变器23输出端连接，并且，交流配电计量柜24的输出端与外部负载或公共电网之间由交流电缆连接。交流配电计量柜24将光伏逆变器23输出的交流电输送至外部负载或电网，并实现交流电能的动力、计量，以及各电气设备的电能转换、分配及控制。The AC power distribution metering cabinet 24 is connected to the output end of the photovoltaic inverter 23, and the output end of the AC power distribution metering cabinet 24 is connected to an external load or a public grid by an AC cable. The AC power distribution metering cabinet 24 transmits the AC power output by the photovoltaic inverter 23 to the external load or the power grid, and realizes the power and measurement of AC power, as well as the power conversion, distribution and control of various electrical equipment.
通讯及环境控制柜26与光伏控制器22相连接，并由光伏控制器22提供工作电源。并且，通讯及环境控制的信号输入端分别连接光伏控制器22的信号输出端、光伏逆变器23的信号输出端、交流配电计量柜24的信号输出端、以及环境监测单元27的信号输出端。通讯及环境控制将采集直流防雷汇流柜21、光伏控制器22、光伏逆变器23、交流配电计量柜24、环境监测单元27等电气设备的电气参数及数据，实现分布式光伏发电控制系统的统一运行监控，数据的集中管理，并通过远程通讯系统实现后台集中监控。同时，通讯及环境控制柜26按照收集的数据自动控制温度调节单元28的运行。The communication and environment control cabinet 26 is connected with the photovoltaic controller 22, and the photovoltaic controller 22 provides working power. Moreover, the signal input terminals of communication and environmental control are respectively connected to the signal output terminal of the photovoltaic controller 22, the signal output terminal of the photovoltaic inverter 23, the signal output terminal of the AC power distribution metering cabinet 24, and the signal output terminal of the environmental monitoring unit 27 end. Communication and environmental control will collect electrical parameters and data of electrical equipment such as DC lightning protection confluence cabinet 21, photovoltaic controller 22, photovoltaic inverter 23, AC power distribution metering cabinet 24, and environmental monitoring unit 27 to realize distributed photovoltaic power generation control The unified operation monitoring of the system, the centralized management of data, and the centralized monitoring of the background are realized through the remote communication system. At the same time, the communication and environment control cabinet 26 automatically controls the operation of the temperature adjustment unit 28 according to the collected data.
环境监测单元27用于检测控制装置2内、外部环境，具体的，在本实施例中，环境监测单元27集成有：实时采集控制装置2所处环境的日照强度、风速、风向、以及温湿度信息的环境检测仪，对控制装置2内的电气设备进行视频监视的摄像头，以及设置在控制装置2顶部内侧的智能光电感烟探测器，通过摄像头和智能光电感烟探测器的结合，可实现火灾自动报警功能。The environmental monitoring unit 27 is used to detect the internal and external environment of the control device 2. Specifically, in this embodiment, the environmental monitoring unit 27 is integrated with: real-time collection of the sunshine intensity, wind speed, wind direction, and temperature and humidity of the environment where the control device 2 is located. The environment detector for information, the camera for video monitoring the electrical equipment in the control device 2, and the intelligent photoelectric smoke detector installed on the inside of the top of the control device 2, through the combination of the camera and the intelligent photoelectric smoke detector, can realize Automatic fire alarm function.
并且，本实施例中的环境监测单元27的监测数据信息可传输至通讯及环境控制柜26，从而可将监测数据信息经通讯及环境控制柜26传送到后台监控系统集中控制。Moreover, the monitoring data information of the environmental monitoring unit 27 in this embodiment can be transmitted to the communication and environmental control cabinet 26, so that the monitoring data information can be transmitted to the background monitoring system through the communication and environmental control cabinet 26 for centralized control.
为了能够适应高寒或高温的恶劣气候环境，使得分布式光伏发电系统能够正常运作，本实施例提供的一体化控制装置2还设置有用于调节控制装置2内部温度的温度调节单元28，具体的，温度调节单元28包含：若干个在低温状态下对控制装置2内进行加热升温的加热板，和若干个在高温状态下对对控制装置2内进行排风降温的散热风机。In order to be able to adapt to the harsh climate environment of high cold or high temperature, so that the distributed photovoltaic power generation system can operate normally, the integrated control device 2 provided in this embodiment is also provided with a temperature adjustment unit 28 for adjusting the internal temperature of the control device 2, specifically, The temperature adjustment unit 28 includes: several heating plates for heating and heating the inside of the control device 2 at low temperature, and several cooling fans for exhausting and cooling the inside of the control device 2 at high temperature.
在本实施例中，直流防雷汇流柜21内集成有：防止短路或过电流的直流熔断器，正常状态下用于控制光伏电池组件与光伏控制器22之间通断的直流断路器，监测模块用于对运行状态进行实时检测，以及防止因雷击或过电压导致光伏电池组件损坏的防雷模块。In this embodiment, the DC lightning protection combiner cabinet 21 is integrated with: a DC fuse to prevent short circuit or overcurrent, a DC circuit breaker used to control the on-off between the photovoltaic cell module and the photovoltaic controller 22 under normal conditions, and monitor The module is used for real-time detection of the operating status, as well as a lightning protection module to prevent damage to photovoltaic cell components due to lightning strikes or overvoltage.
本实施例提供的分布式光伏发电微网系统具有一体化结构，采用直流电缆就近连接光伏电池组件方阵和控制装置，并且，由交流电缆将控制装置就近连接到负载或公共电网，便于在较偏远或地质条件较差的地域就近设置，以减少电力传输距离，从而降低线路损耗，提高电能传输效率，满足负载的用电需求。另外，通过在控制装置上设置环境监测单元和温度调节单元，使得控制装置在较恶劣的自然环境状态下也能够正常工作。The distributed photovoltaic power generation micro-grid system provided in this embodiment has an integrated structure, and a DC cable is used to connect the photovoltaic cell module array and the control device nearby, and the control device is connected to the load or the public power grid nearby by the AC cable, which is convenient in relatively short distances. Remote or poor geological conditions are set nearby to reduce the power transmission distance, thereby reducing line loss, improving power transmission efficiency, and meeting the power demand of the load. In addition, by setting an environment monitoring unit and a temperature adjustment unit on the control device, the control device can also work normally in a relatively harsh natural environment.
当然本实用新型所涉及的分布式光伏发电微网系统并不仅仅限定于本实施例中的结构，任何对本实用新型进行的等同修改和替代也都在本实用新型的范畴内。Of course, the distributed photovoltaic power generation micro-grid system involved in the utility model is not limited to the structure in this embodiment, and any equivalent modification and replacement of the utility model are also within the scope of the utility model.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356890A (en) * | 2016-10-07 | 2017-01-25 | 国网青海省电力公司海东供电公司 | Distributed photovoltaic power generation-based power supply system for township power supply station |
| CN108134386A (en) * | 2018-01-04 | 2018-06-08 | 江苏绿国新能源科技有限公司 | A kind of distributed energy sale of electricity control device |
| CN113852118A (en) * | 2021-08-11 | 2021-12-28 | 华翔翔能科技股份有限公司 | Photovoltaic phase-sequence-free power generation system |
| CN114024324A (en) * | 2021-11-03 | 2022-02-08 | 福建网能科技开发有限责任公司 | A high-voltage reactive power compensation system for solar photovoltaic power generation |
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2014
- 2014-12-19 CN CN201420815350.9U patent/CN204243785U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356890A (en) * | 2016-10-07 | 2017-01-25 | 国网青海省电力公司海东供电公司 | Distributed photovoltaic power generation-based power supply system for township power supply station |
| CN108134386A (en) * | 2018-01-04 | 2018-06-08 | 江苏绿国新能源科技有限公司 | A kind of distributed energy sale of electricity control device |
| CN113852118A (en) * | 2021-08-11 | 2021-12-28 | 华翔翔能科技股份有限公司 | Photovoltaic phase-sequence-free power generation system |
| CN114024324A (en) * | 2021-11-03 | 2022-02-08 | 福建网能科技开发有限责任公司 | A high-voltage reactive power compensation system for solar photovoltaic power generation |
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