CN117202646A - Micro-grid inversion control device and control method - Google Patents
Micro-grid inversion control device and control method Download PDFInfo
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Abstract
Description
技术领域Technical field
本发明涉及微电网技术领域，具体涉及一种微电网逆变控制装置以及控制方法。The invention relates to the technical field of microgrid, and in particular to a microgrid inverter control device and a control method.
背景技术Background technique
微电网也译为微网，是指由分布式电源、储能装置、能量转换装置、负荷、监控和保护装置等组成的小型发配电系统，微电网的提出旨在实现分布式电源的灵活、高效应用，解决数量庞大、形式多样的分布式电源并网问题，开发和延伸微电网能够充分促进分布式电源与可再生能源的大规模接入，实现对负荷多种能源形式的高可靠供给，是实现主动式配电网的一种有效方式，使传统电网向智能电网过渡。Microgrid, also translated as microgrid, refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc. The microgrid is proposed to achieve the flexibility of distributed power sources. , Efficient application to solve the problem of connecting a large number of distributed power sources with various forms to the grid. The development and extension of microgrids can fully promote the large-scale access of distributed power sources and renewable energy and achieve highly reliable supply of multiple energy forms to the load. , is an effective way to realize active distribution network and make the transition from traditional power grid to smart grid.
现有对于微电网光伏领域进型使用时，需要使用到逆变控制器进行转化电能进行储存使用，但现有的逆变控制器通常安装在室外，外接蚊虫容易从散热孔隙处进入内部，容易导致腐蚀损坏，且逆变控制器在运行时自身会不断产生热量，因此当天气炎热时逆变控制器受外接温度影响不容易进行散热，从而导致内部温度过高。When using existing microgrids in the photovoltaic field, an inverter controller is needed to convert electrical energy for storage and use. However, existing inverter controllers are usually installed outdoors, and external mosquitoes can easily enter the interior through the heat dissipation holes. Causes corrosion damage, and the inverter controller itself will continuously generate heat when running. Therefore, when the weather is hot, the inverter controller is affected by the external temperature and cannot easily dissipate heat, causing the internal temperature to be too high.
发明内容Contents of the invention
本发明要解决的技术问题是，安装在室外的逆变控制器蚊虫容易从散热孔隙处进入内部，天气炎热时逆变控制器受外接温度影响不容易进行散热，从而导致内部温度过高，故提供一种微电网逆变控制装置以及控制方法，使其解决以上问题。The technical problem to be solved by this invention is that mosquitoes can easily enter the interior of the inverter controller installed outdoors through the heat dissipation holes. When the weather is hot, the inverter controller is affected by the external temperature and cannot easily dissipate heat, resulting in excessive internal temperature. A microgrid inverter control device and control method are provided to solve the above problems.
本发明解决技术问题采用的技术方案是：一种微电网逆变控制装置以及控制方法，其包括：逆变控制器主体，所述逆变控制器主体上端两侧对称设置有挡板，所述挡板与逆变控制器主体之间设置有进风口，所述进风口内部设置有第一灭虫电网，所述进风口内部位于第一灭虫电网上端一侧设置有第一防尘网，所述逆变控制器主体位于进风口一侧开设有豁口，所述逆变控制器主体内部设置有循环盘管，所述循环盘管一端设置有进水口，所述循环盘管另一端设置有回水口。The technical solution adopted by the present invention to solve the technical problem is: a microgrid inverter control device and a control method, which include: an inverter controller main body, the upper end of the inverter controller main body is symmetrically provided with baffles on both sides, and the An air inlet is provided between the baffle and the main body of the inverter controller. A first insect-killing grid is provided inside the air inlet. A first dust-proof net is provided inside the air inlet at the upper end of the first insect-killing grid. The main body of the inverter controller is provided with a gap on one side of the air inlet. A circulation coil is provided inside the main body of the inverter controller. One end of the circulation coil is provided with a water inlet, and the other end of the circulation coil is provided with a water inlet. Return water outlet.
进一步地，所述逆变控制器主体底端一侧设置有排风扇，所述排风扇底端一侧设置有第二防尘网。Further, an exhaust fan is provided on one side of the bottom of the main body of the inverter controller, and a second dust-proof net is provided on one side of the bottom of the exhaust fan.
进一步地，所述逆变控制器主体位于第二防尘网下端一侧设置有第二灭虫电网。Further, a second insect-killing power grid is provided on the side of the lower end of the second dust-proof net on the main body of the inverter controller.
进一步地，所述逆变控制器主体内部设置有接线组件，所述接线组件连接有导线。Further, a wiring assembly is provided inside the main body of the inverter controller, and the wiring assembly is connected with wires.
进一步地，所述逆变控制器主体内部设置有温度传感器，所述温度传感器型号为Pt。Further, a temperature sensor is provided inside the main body of the inverter controller, and the temperature sensor model is Pt.
进一步地，所述温度传感器电性连接控制器，所述控制器电性连接制冷器，所述制冷器输出端管道连接进水口，所述制冷器回水端管道连接回水口。Further, the temperature sensor is electrically connected to the controller, the controller is electrically connected to the refrigerator, the output pipe of the refrigerator is connected to the water inlet, and the return pipe of the refrigerator is connected to the water return port.
进一步地，所述逆变控制器主体通过导线连接有蓄电池储能，所述蓄电池储能电性连接制冷器，逆变控制器主体一侧设置有显示屏。Further, the main body of the inverter controller is connected to a battery for energy storage through wires, the battery for energy storage is electrically connected to the refrigerator, and a display screen is provided on one side of the main body of the inverter controller.
一种微电网逆变控制装置的控制方法，包括以下步骤：A control method for a microgrid inverter control device, including the following steps:
S1：逆变控制器主体内部通过PQ控制，使DG的输出功率等于规定值；S1: The main body of the inverter controller is controlled by PQ to make the output power of DG equal to the specified value;
S2：在PQ控制机制下，通过充足的光照时间和光照强度，能够快速且准确地对最大功率点实现跟踪；S2: Under the PQ control mechanism, through sufficient light time and light intensity, the maximum power point can be tracked quickly and accurately;
S3：通过恒压恒频控制在保持DG的输出电压和频率不变的条件下完成系统控制，使其不受DG输出功率的影响；S3: Through constant voltage and constant frequency control, the system control is completed while keeping the output voltage and frequency of DG unchanged, so that it is not affected by the output power of DG;
S4：通过下垂控制来使得DG电压幅值与频率值维持平稳；S4: Maintain stable DG voltage amplitude and frequency values through droop control;
S5：通过逆变控制器主体转变的电能储备在蓄电池储能中，当温度传感器检测逆变控制器主体内部温度过高时，则将对应信号传递给控制器，通过控制器接通蓄电池储能与制冷器之间的电路，使得制冷器中制冷后的水从进水口进入循环盘管中，再从回水口处回到制冷器中，通过循环盘管中的流通的冷水进行对逆变控制器主体1进行降温。S5: The electric energy converted by the main body of the inverter controller is stored in the battery energy storage. When the temperature sensor detects that the internal temperature of the inverter controller main body is too high, the corresponding signal is transmitted to the controller, and the battery energy storage is connected through the controller. The circuit between the refrigerator and the refrigerator allows the cooled water in the refrigerator to enter the circulation coil from the water inlet, and then return to the refrigerator from the water return port. The inverter is controlled by the cold water circulating in the circulation coil. The main body 1 of the device is cooled down.
进一步地，所述逆变控制器主体1的有功和无功输出功率用数学模型为： Further, the mathematical model of the active and reactive output power of the inverter controller body 1 is:
式中，E、Ei分别表示逆变电源并网运行模式下的电压和分布式逆变电源的输出电压；Z表示分布式逆变电源输出阻抗；θzi表示E与Ei的夹角。In the formula, E and E i respectively represent the voltage of the inverter power supply in grid-connected operation mode and the output voltage of the distributed inverter power supply; Z represents the output impedance of the distributed inverter power supply; θ zi represents the angle between E and E i .
进一步地，所述DG为分布式电源，所述PQ为恒功率。Further, the DG is a distributed power supply, and the PQ is a constant power.
本发明具有以下优点：本逆变控制器主体可恒压恒频进行输出供电，且通过逆变控制器主体内部的循环盘管配合温度传感器和排风扇，可根据逆变控制器内部温度，自动切换，温度过高时则自动切换制冷器向循环盘管内部充入冷却水进行降温，且通过第一灭虫电网和第二灭虫电网可有效消灭接近进风口和排风扇处的蚊虫。The invention has the following advantages: the main body of the inverter controller can output power at constant voltage and constant frequency, and through the circulation coil inside the main body of the inverter controller and the temperature sensor and exhaust fan, it can automatically switch according to the internal temperature of the inverter controller. , when the temperature is too high, the refrigerator will be automatically switched to fill the cooling water inside the circulation coil to cool down, and the first insect-killing grid and the second insect-killing grid can effectively eliminate mosquitoes near the air inlet and exhaust fan.
附图说明Description of the drawings
图1是本发明优选实施例的逆变控制器主体结构示意图；Figure 1 is a schematic diagram of the main structure of the inverter controller according to the preferred embodiment of the present invention;
图2是本发明优选实施例的逆变控制器主体剖视结构示意图；Figure 2 is a schematic cross-sectional structural diagram of the main body of the inverter controller according to the preferred embodiment of the present invention;
图3是本发明优选实施例的循环盘管结构示意图；Figure 3 is a schematic structural diagram of a circulating coil according to a preferred embodiment of the present invention;
图4是本发明优选实施例的图2结构A放大示意图；Figure 4 is an enlarged schematic diagram of structure A of Figure 2 according to a preferred embodiment of the present invention;
图5是本发明优选实施例的排风扇与第二防尘网拆分结构示意图；Figure 5 is a schematic diagram of the structure of the exhaust fan and the second dust-proof net in the preferred embodiment of the present invention;
图6是本发明优选实施例的逆变控制器主体散热运行原理示意图；Figure 6 is a schematic diagram of the heat dissipation operation principle of the main body of the inverter controller according to the preferred embodiment of the present invention;
图7是本发明优选实施例的恒功率控制原理示意图；Figure 7 is a schematic diagram of the constant power control principle of the preferred embodiment of the present invention;
图8是本发明优选实施例的恒压恒频控制原理示意图；Figure 8 is a schematic diagram of the constant voltage and constant frequency control principle of the preferred embodiment of the present invention;
图9是本发明优选实施例的P/f下垂控制曲线特性示意图；Figure 9 is a schematic diagram of the P/f droop control curve characteristics of the preferred embodiment of the present invention;
图10是本发明优选实施例的Q/u下垂控制曲线特性示意图。Figure 10 is a schematic diagram of the Q/u droop control curve characteristics of the preferred embodiment of the present invention.
附图标记说明：1、逆变控制器主体；2、挡板；201、进风口；202、第一灭虫电网；203、第一防尘网；204、豁口；3、循环盘管；301、进水口；302、回水口；4、排风扇；5、第二防尘网；6、第二灭虫电网；7、接线组件；8、导线；9、温度传感器。Explanation of reference signs: 1. Main body of the inverter controller; 2. Baffle; 201. Air inlet; 202. First insect-killing grid; 203. First dust-proof net; 204. Gap; 3. Circulation coil; 301 , water inlet; 302, water return port; 4, exhaust fan; 5, second dust-proof net; 6, second pest control grid; 7, wiring components; 8, wires; 9, temperature sensor.
具体实施方式Detailed ways
下面对本发明实施例中的技术方案进行清楚、完整地描述。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围，在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。The technical solutions in the embodiments of the present invention are described clearly and completely below. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Many specific details are set forth in the following description to fully facilitate It is understood that the present invention can also be implemented in other ways than those described here. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
请结合参阅图1-图10，本发明一种微电网逆变控制装置以及控制方法，包括：逆变控制器主体1，逆变控制器主体1上端两侧对称设置有挡板2，挡板2与逆变控制器主体1之间设置有进风口201，进风口201内部设置有第一灭虫电网202，进风口201内部位于第一灭虫电网202上端一侧设置有第一防尘网203，逆变控制器主体1位于进风口201一侧开设有豁口204，逆变控制器主体1内部设置有循环盘管3，循环盘管3一端设置有进水口301，循环盘管3另一端设置有回水口302。Please refer to Figures 1 to 10 in conjunction with the present invention. A microgrid inverter control device and a control method include: an inverter controller body 1. The upper end of the inverter controller body 1 is symmetrically provided with baffles 2 on both sides. There is an air inlet 201 between 2 and the main body 1 of the inverter controller. A first insect-killing grid 202 is arranged inside the air inlet 201. A first dust-proof net is arranged inside the air inlet 201 at the upper end of the first insect-killing grid 202. 203. The main body 1 of the inverter controller is provided with a gap 204 on one side of the air inlet 201. The main body 1 of the inverter controller is provided with a circulation coil 3. One end of the circulation coil 3 is provided with a water inlet 301, and the other end of the circulation coil 3 is A water return port 302 is provided.
结合图2和图5所示，其中逆变控制器主体1底端一侧设置有排风扇4，通过蓄电池储能给排风扇4供电，且排风扇4电性连接控制器，运行排风扇4时，则外接的空气从进风口201处进入逆变控制器主体1内部，同时逆变控制器主体1内部的热量从排风扇4处排出，通过蓄电池春储能可对第一灭虫电网202和第二灭虫电网6进行供电，因此可有效保证逆变控制器主体1内部不会进入虫子，排风扇4底端一侧设置有第二防尘网5，逆变控制器主体1位于第二防尘网5下端一侧设置有第二灭虫电网6，逆变控制器主体1内部设置有接线组件7，接线组件7连接有导线8，逆变控制器主体1内部设置有温度传感器9，温度传感器9型号为Pt100。As shown in Figure 2 and Figure 5, an exhaust fan 4 is provided at the bottom side of the inverter controller body 1. The exhaust fan 4 is powered by battery energy storage, and the exhaust fan 4 is electrically connected to the controller. When the exhaust fan 4 is running, an external The air enters the interior of the inverter controller body 1 from the air inlet 201, and at the same time, the heat inside the inverter controller body 1 is discharged from the exhaust fan 4. The first pest control grid 202 and the second pest control grid 202 can be controlled through battery energy storage. The power grid 6 provides power, so it can effectively ensure that insects will not enter the inside of the inverter controller body 1. A second dust-proof net 5 is provided at the bottom side of the exhaust fan 4, and the inverter controller main body 1 is located at the lower end of the second dust-proof net 5 A second pest-killing grid 6 is provided on one side. A wiring assembly 7 is provided inside the inverter controller body 1. The wiring assembly 7 is connected to a wire 8. A temperature sensor 9 is provided inside the inverter controller body 1. The model of the temperature sensor 9 is Pt100.
温度传感器9电性连接控制器，控制器电性连接制冷器，通过温度传感器9当检测逆变控制器主体1内部温度过高时，则将信号传递给控制器，通过控制器运行制冷器，同时关闭排风扇4，以此便于保证逆变控制器主体1内部降温后的空气不会流出，制冷器输出端管道连接进水口301，制冷器回水端管道连接回水口302，逆变控制器主体1通过导线8连接有蓄电池储能，蓄电池储能电性连接制冷器，逆变控制器主体1一侧设置有显示屏10。The temperature sensor 9 is electrically connected to the controller, and the controller is electrically connected to the refrigerator. When the internal temperature of the inverter controller body 1 is detected to be too high through the temperature sensor 9, the signal is transmitted to the controller, and the refrigerator is operated through the controller. At the same time, the exhaust fan 4 is closed to ensure that the cooled air inside the inverter controller body 1 will not flow out. The output pipe of the refrigerator is connected to the water inlet 301, the return pipe of the refrigerator is connected to the return port 302, and the main body of the inverter controller 1. The battery energy storage is connected through the wire 8. The battery energy storage is electrically connected to the refrigerator. A display screen 10 is provided on one side of the inverter controller body 1.
一种微电网逆变控制装置的控制方法，包括以下步骤：A control method for a microgrid inverter control device, including the following steps:
S1：逆变控制器主体1内部通过PQ控制，使DG的输出功率等于规定值；结合图7所示P/Q分别表示等效额定有功/无功功率，id和iq分别表示d轴方向和q轴方向上的等效实际电流。S1: The inverter controller body 1 is internally controlled by PQ to make the output power of DG equal to the specified value; combined with the P/Q shown in Figure 7, respectively represent the equivalent rated active/reactive power, i d and i q represent the d axis respectively. direction and the equivalent actual current in the q-axis direction.
S2：在PQ控制机制下，通过充足的光照时间和光照强度，能够快速且准确地对最大功率点实现跟踪；S2: Under the PQ control mechanism, through sufficient light time and light intensity, the maximum power point can be tracked quickly and accurately;
S3：通过恒压恒频控制在保持DG的输出电压和频率不变的条件下完成系统控制，使其不受DG输出功率的影响；结合图8所示，ud-ref、uq-ref分别表示给定参考电压在d轴和q的分量；id-ref、iq-ref表示电路的实际电流值在d轴和q的分量。S3: Through constant voltage and constant frequency control, the system control is completed while keeping the output voltage and frequency of DG unchanged, so that it is not affected by the output power of DG; as shown in Figure 8, u d-ref and u q-ref represent the components of the given reference voltage on the d-axis and q respectively; i d-ref and i q-ref represent the components of the actual current value of the circuit on the d-axis and q.
S4：通过下垂控制来使得DG电压幅值与频率值维持平稳；S4: Maintain stable DG voltage amplitude and frequency values through droop control;
S5：通过逆变控制器主体1转变的电能储备在蓄电池储能中，当温度传感器9检测逆变控制器主体1内部温度过高时，则将对应信号传递给控制器，通过控制器接通蓄电池储能与制冷器之间的电路，使得制冷器中制冷后的水从进水口301进入循环盘管3中，再从回水口302处回到制冷器中，通过循环盘管3中的流通的冷水进行对逆变控制器主体1进行降温。S5: The electric energy converted by the inverter controller body 1 is stored in the battery energy storage. When the temperature sensor 9 detects that the internal temperature of the inverter controller body 1 is too high, the corresponding signal is transmitted to the controller, and the controller is connected The circuit between the battery energy storage and the refrigerator allows the cooled water in the refrigerator to enter the circulation coil 3 from the water inlet 301, and then return to the refrigerator from the water return port 302, through the circulation in the circulation coil 3 of cold water to cool down the main body 1 of the inverter controller.
逆变控制器主体1的有功和无功输出功率用数学模型为：The mathematical model of the active and reactive output power of the inverter controller body 1 is:
式中，E、Ei分别表示逆变电源并网运行模式下的电压和分布式逆变电源的输出电压；Z表示分布式逆变电源输出阻抗；θzi表示E与Ei的夹角。DG为分布式电源，PQ为恒功率，结合图9和图10所示相位角θi,将影响DG的有功输出功率大小，振幅Ei影响各DG的无功功率大小，微电网系统的输出频率根据逆变器的有功输出进行调节控制。In the formula, E and E i respectively represent the voltage of the inverter power supply in grid-connected operation mode and the output voltage of the distributed inverter power supply; Z represents the output impedance of the distributed inverter power supply; θ zi represents the angle between E and E i . DG is a distributed power supply, and PQ is a constant power. Combined with the phase angle θ i shown in Figure 9 and Figure 10, it will affect the active output power of the DG, and the amplitude E i will affect the reactive power of each DG and the output of the microgrid system. The frequency is regulated and controlled based on the active power output of the inverter.
以上显示和描述了本发明的基本原理和主要特征和本发明的优点,对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments without departing from the spirit or basics of the present invention. In the case of specific features, the present invention can be implemented in other specific forms. Therefore, the embodiments should be regarded as illustrative and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is therefore intended that all claims falling within the claims All changes within the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims shall not be construed as limiting the claim in question.
本发明中其他未详述部分均属于现有技术，故在此不再赘述。Other parts not described in detail in the present invention belong to the prior art, so they will not be described again here.
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention. scope.
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