CN204030630U - A kind of mixed type micro-grid system - Google Patents
A kind of mixed type micro-grid system Download PDFInfo
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Abstract
本实用新型公开了一种混合型微电网系统，包括柴油机发电系统、VF源储能装置、静态转换开关、输配电线路、PQ源储能装置、可再生能源发电系统以及交流负载，其中：柴油机发电系统与VF源储能装置分别连接到静态转换开关的两个输入端，静态转换开关的输出端连接到输配电线路上，PQ源储能装置、可再生能源发电系统以及交流负载分别连接在输配电线路上。实施本实用新型的有益效果是，通过静态转换开关实现VF源储能装置供电和柴油机发电系统供电之间的完全无缝切换，在可再生能源发电和电池储能足够时切换到VF源储能装置供电，不足时切换到柴油机发电系统供电，保证了微电网的连续供电。
The utility model discloses a hybrid micro-grid system, which includes a diesel engine power generation system, a VF source energy storage device, a static transfer switch, power transmission and distribution lines, a PQ source energy storage device, a renewable energy power generation system and an AC load, wherein: The diesel engine power generation system and the VF source energy storage device are respectively connected to the two input ends of the static transfer switch, the output end of the static transfer switch is connected to the transmission and distribution line, and the PQ source energy storage device, the renewable energy power generation system and the AC load are respectively connected on transmission and distribution lines. The beneficial effect of implementing the utility model is that the completely seamless switching between the power supply of the VF source energy storage device and the power supply of the diesel engine power generation system is realized through the static transfer switch, and when the renewable energy power generation and the battery energy storage are sufficient, switch to the VF source energy storage The power supply of the device is switched to the diesel generator system for power supply when it is insufficient, which ensures the continuous power supply of the microgrid.
Description
技术领域technical field
本实用新型涉及微电网技术领域，更具体地说，涉及一种混合型微电网系统。The utility model relates to the technical field of micro-grids, in particular to a hybrid micro-grid system.
背景技术Background technique
目前，国家能源局为了解决西北地区和近海海岛的用电问题，通常采用柴油机供电。然而采用柴油机供电对环境污染大，供电质量差，能效利用低，且对于偏远地区和海岛区域柴油运输不方便，经常受天气影响，柴油供应不及时，经常出现断电的情况。At present, in order to solve the problem of electricity consumption in Northwest China and offshore islands, the National Energy Administration usually uses diesel engines for power supply. However, the use of diesel engines for power supply has serious environmental pollution, poor power supply quality, low energy efficiency utilization, and inconvenient diesel transportation in remote areas and island areas. It is often affected by the weather, diesel supply is not timely, and power outages often occur.
随着国家“十二五”规划进一步实施，光伏发电作为一种主要新能源，正被广泛使用，但对于以光伏发电为代表的新能源接入柴油机电网，会导致电网运行非常不稳定，且控制复杂。With the further implementation of the national "Twelfth Five-Year Plan", photovoltaic power generation, as a major new energy source, is being widely used, but for new energy represented by photovoltaic power generation to be connected to the diesel engine grid, the operation of the grid will be very unstable, and Control is complex.
实用新型内容Utility model content
本实用新型要解决的技术问题在于，针对现有技术的上述缺陷，提供一种混合型微电网系统。The technical problem to be solved by the utility model is to provide a hybrid micro-grid system for the above-mentioned defects of the prior art.
本实用新型解决其技术问题所采用的技术方案是：构造一种混合型微电网系统，包括柴油机发电系统、VF源储能装置、静态转换开关、输配电线路、PQ源储能装置、可再生能源发电系统以及交流负载，其中：所述柴油机发电系统与所述VF源储能装置分别连接到所述静态转换开关的两个输入端，所述静态转换开关的输出端连接到所述输配电线路上，所述PQ源储能装置、可再生能源发电系统以及所述交流负载分别连接在所述输配电线路上。The technical solution adopted by the utility model to solve its technical problems is: to construct a hybrid micro-grid system, including a diesel engine power generation system, a VF source energy storage device, a static transfer switch, power transmission and distribution lines, a PQ source energy storage device, and A renewable energy power generation system and an AC load, wherein: the diesel engine power generation system and the VF source energy storage device are respectively connected to the two input ends of the static transfer switch, and the output end of the static transfer switch is connected to the output On the power distribution line, the PQ source energy storage device, the renewable energy generation system and the AC load are respectively connected to the transmission and distribution line.
在上述混合型微电网系统中，所述VF源储能装置包括VF源储能变流器及第一电池单元，其中：所述VF源储能变流器的直流端连接所述第一电池单元，所述VF源储能变流器的交流端连接到所述输配电线路上。In the above hybrid microgrid system, the VF source energy storage device includes a VF source energy storage converter and a first battery unit, wherein: the DC end of the VF source energy storage converter is connected to the first battery unit, and the AC end of the VF source energy storage converter is connected to the transmission and distribution line.
在上述混合型微电网系统中，所述PQ源储能装置包括PQ源储能变流器及第二电池单元，其中：所述PQ源储能变流器的直流端连接所述第二电池单元，所述PQ源储能变流器的交流端连接到所述输配电线路上。In the above hybrid microgrid system, the PQ source energy storage device includes a PQ source energy storage converter and a second battery unit, wherein: the DC end of the PQ source energy storage converter is connected to the second battery unit, and the AC end of the PQ source energy storage converter is connected to the transmission and distribution line.
在上述混合型微电网系统中，所述可再生能源发电系统包括可再生能源发电模块及逆变器，其中：所述可再生能源发电系统发出的直流电经所述逆变器逆变成交流电后输送到所述输配电线路上。In the above hybrid micro-grid system, the renewable energy power generation system includes a renewable energy power generation module and an inverter, wherein: the direct current generated by the renewable energy power generation system is converted into alternating current by the inverter sent to the transmission and distribution lines.
在上述混合型微电网系统中，所述可再生能源发电模块包括光伏发电/风力发电。In the above hybrid micro-grid system, the renewable energy generation module includes photovoltaic power generation/wind power generation.
实施本实用新型的混合型微电网系统，具有以下有益效果：通过静态转换开关实现VF源储能装置供电和柴油机发电系统供电之间的完全无缝切换，在光伏或者风力发电和电池储能足够时切换到VF源储能装置供电，关停柴油机发电系统，降低了系统运营成本，以及在光伏或风力发电和电池储能不足时切换到柴油机发电系统供电，保证了微电网的连续供电。Implementing the hybrid micro-grid system of the utility model has the following beneficial effects: the completely seamless switch between the power supply of the VF source energy storage device and the power supply of the diesel engine power generation system is realized through the static transfer switch, and the photovoltaic or wind power generation and the battery energy storage are sufficient Switching to the VF source energy storage device for power supply, shutting down the diesel engine power generation system, reducing system operating costs, and switching to the diesel engine power generation system for power supply when photovoltaic or wind power generation and battery energy storage are insufficient, ensuring continuous power supply of the microgrid.
附图说明Description of drawings
下面将结合附图及实施例对本实用新型作进一步说明，附图中：The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:
图1是本实用新型一种混合型微电网系统实施例的示意图。Fig. 1 is a schematic diagram of an embodiment of a hybrid microgrid system of the present invention.
具体实施方式Detailed ways
为了对本实用新型的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本实用新型的具体实施方式。In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is described in detail with reference to the accompanying drawings.
如图1所示，为本实用新型混合型微电网系统实施例的示意图，该混合型微电网系统包括柴油机发电系统10、VF源储能装置20、静态转换开关30、输配电线路40、PQ源储能装置50、可再生能源发电系统60以及交流负载70，其中：柴油机发电系统10和VF源储能装置20分别连接到静态转换开关30的两个输入端，静态转换开关30的输出端连接到输配电线路40上，PQ源储能装置50、可再生能源发电系统60以及交流负载70分别连接到输配电线路40上。As shown in Figure 1, it is a schematic diagram of an embodiment of the hybrid microgrid system of the present invention. The hybrid microgrid system includes a diesel engine power generation system 10, a VF source energy storage device 20, a static transfer switch 30, a power transmission and distribution line 40, The PQ source energy storage device 50, the renewable energy power generation system 60 and the AC load 70, wherein: the diesel engine power generation system 10 and the VF source energy storage device 20 are respectively connected to the two input ends of the static transfer switch 30, and the output of the static transfer switch 30 The terminal is connected to the power transmission and distribution line 40, and the PQ source energy storage device 50, the renewable energy generation system 60 and the AC load 70 are respectively connected to the power transmission and distribution line 40.
上述静态转换开关30主要用于依据整个电站的储能能量(在本实施例中为VF源储能装置20和PQ源储能装置50中存储的电量)实现VF源储能装置与柴油机发电系统间的无缝切换，即从VF源储能装置供电无缝切换到柴油机发电系统供电，或者从柴油机发电系统供电无缝切换到VF源储能装置供电。具体地，本实用新型混合型微电网系统主要通过可再生能源发电系统60提供电能，供给交流负载70或其它设备使用，多余的能量存储在VF源储能装置20和PQ源储能装置50中，当该混合型微电网系统中VF源储能装置20和PQ源储能装置50中存储的电量不够交流负载70使用，并且可再生能源发电系统60提供的能量也不够时，启动柴油机发电系统10工作正常后，柴油机发电系统10和VF源储能装置20同时供电，之后静态转换开关30切断VF源储能装置20供电，即实现从VF源储能装置20供电无缝切换到柴油机发电系统10供电。此外，当可再生能源发电系统60或者PQ源储能装置50中存储的电量能够满足交流负载70供电时，启动VF源储能装置20，柴油机发电系统10和VF源储能装置20同时供电，通过静态转换开关30实现从柴油机发电系统10供电无缝切换到VF源储能装置20供电，关停柴油机发电系统10。The above-mentioned static transfer switch 30 is mainly used to realize the VF source energy storage device and the diesel engine power generation system according to the energy storage energy of the entire power station (in this embodiment, the electricity stored in the VF source energy storage device 20 and the PQ source energy storage device 50). The seamless switching between, that is, the seamless switching from the power supply of the VF source energy storage device to the power supply of the diesel generator system, or the seamless switching from the power supply of the diesel generator system to the power supply of the VF source energy storage device. Specifically, the hybrid micro-grid system of the present invention mainly provides electric energy through the renewable energy generation system 60 to supply the AC load 70 or other equipment, and the excess energy is stored in the VF source energy storage device 20 and the PQ source energy storage device 50 , when the power stored in the VF source energy storage device 20 and the PQ source energy storage device 50 in the hybrid microgrid system is not enough for the AC load 70, and the energy provided by the renewable energy generation system 60 is not enough, start the diesel engine power generation system 10 After working normally, the diesel engine power generation system 10 and the VF source energy storage device 20 supply power at the same time, and then the static transfer switch 30 cuts off the power supply of the VF source energy storage device 20, that is, seamlessly switches the power supply from the VF source energy storage device 20 to the diesel engine power generation system 10 power supply. In addition, when the electricity stored in the renewable energy power generation system 60 or the PQ source energy storage device 50 can satisfy the power supply of the AC load 70, the VF source energy storage device 20 is started, and the diesel engine power generation system 10 and the VF source energy storage device 20 supply power at the same time. The static transfer switch 30 realizes seamless switching from the power supply of the diesel engine power generation system 10 to the power supply of the VF source energy storage device 20 , and shuts down the diesel engine power generation system 10 .
上述VF源储能装置20包括VF源储能变流器201和第一电池单元202，其中：VF源储能变流器201的直流端与第一电池单元202连接，VF源储能变流器201的交流端连接到输配电线路40上，该VF源储能变流器201因工作在VF源模式，主要用于构建输配电线路。上述PQ源储能装置50包括PQ源储能变流器501和第二电池单元502，其中：PQ源储能变流器501的直流端与第二电池单元502连接，PQ源储能变流器501的交流端连接到输配电线路40上，该PQ源储能变流器501因工作在PQ源模式，主要用于承担储能及系统功率调节功能。The above-mentioned VF source energy storage device 20 includes a VF source energy storage converter 201 and a first battery unit 202, wherein: the DC terminal of the VF source energy storage converter 201 is connected to the first battery unit 202, and the VF source energy storage converter 202 The AC end of the converter 201 is connected to the power transmission and distribution line 40, and the VF source energy storage converter 201 is mainly used to construct the power transmission and distribution line because it works in the VF source mode. The PQ source energy storage device 50 includes a PQ source energy storage converter 501 and a second battery unit 502, wherein: the DC terminal of the PQ source energy storage converter 501 is connected to the second battery unit 502, and the PQ source energy storage converter 502 The AC end of the converter 501 is connected to the power transmission and distribution line 40. The PQ source energy storage converter 501 is mainly used for energy storage and system power regulation functions because it works in the PQ source mode.
上述可再生能源发电系统60包括可再生能源发电模块601及逆变器602，其中：可再生能源发电模块601在本实施例中优选为光伏发电/风力发电，其发出的直流电经逆变器602逆变成交流电后输送到输配电线路40上。The above-mentioned renewable energy power generation system 60 includes a renewable energy power generation module 601 and an inverter 602, wherein: the renewable energy power generation module 601 is preferably photovoltaic power generation/wind power generation in this embodiment, and the direct current generated by it is passed through the inverter 602 After being converted into alternating current, it is sent to the power transmission and distribution line 40 .
因此在本实用新型中，柴油机发电系统10和VF源储能变流器201用于构建离网型基础电网，两者之间通过静态转换开关30实现在线无缝切换。PQ源储能变流器501配合储能，光伏、风力发电等提供新型能源。Therefore, in the present utility model, the diesel generator system 10 and the VF source energy storage converter 201 are used to build an off-grid basic grid, and the static transfer switch 30 realizes online seamless switching between the two. PQ source energy storage converter 501 cooperates with energy storage, photovoltaic and wind power generation to provide new energy.
具体地，静态转换开关30实现VF源储能装置20和柴油机发电系统10之间的无缝切换具体过程如下：上述混合型微电网系统还包括一控制中心(图中未示出)，其主要用于控制静态转换开关30的切换状态。在该混合型微电网系统中，通过光伏、风力发电等可再生能源提供电能，供交流负载使用，多余的电能则通过VF源储能变流器201和PQ源储能变流器501分别储存在第一电池单元202和第二电池单元502中，而第一电池单元202和第二电池单元502均包括一电池管理系统(图未示)，控制中心则可以通过相应的电池管理系统获取第一电池单元202和第二电池单元502的当前电量，当获得的第一电池单元202和第二电池单元502中存储的电量不够时，此时光伏、风力发电等可再生能源也因天气、时间段等不能提供足够的能量供负载使用时，启动柴油机发电系统10，VF源储能装置20和柴油机发电系统10两者同时供电。在系统进入稳定状态时，控制中心也即后台控制该静态转换开关30切断VF源储能装置20供电，柴油机发电系统10发出的交流电直接输送到输配电线路40上，以供交流负载70使用。Specifically, the static transfer switch 30 realizes the seamless switching between the VF source energy storage device 20 and the diesel generator system 10. It is used to control the switching state of the static transfer switch 30 . In this hybrid microgrid system, renewable energy such as photovoltaics and wind power is used to provide electric energy for AC loads, and the excess electric energy is stored by the VF source energy storage converter 201 and the PQ source energy storage converter 501 respectively. In the first battery unit 202 and the second battery unit 502, and both the first battery unit 202 and the second battery unit 502 include a battery management system (not shown), the control center can obtain the second The current electric quantity of the first battery unit 202 and the second battery unit 502, when the obtained electric quantity stored in the first battery unit 202 and the second battery unit 502 is not enough, the renewable energy sources such as photovoltaic and wind power generation are also affected by the weather and time. When the section and the like cannot provide enough energy for the load to use, start the diesel generator system 10, and the VF source energy storage device 20 and the diesel generator system 10 will supply power at the same time. When the system enters a stable state, the control center, that is, the background controls the static transfer switch 30 to cut off the power supply of the VF source energy storage device 20, and the AC power generated by the diesel generator system 10 is directly sent to the power transmission and distribution line 40 for use by the AC load 70 .
当光伏发电或风力发电功率能够满足交流负载70的供电要求时，此时启动VF源储能装置20，VF源储能装置20与柴油机发电系统10两者同时供电。在系统进入稳定状态时，控制中心再控制静态转换开关30切断柴油机发电系统10供电，VF源储能装置20直接连接到输配电线路40上。因此静态转换开关30能够在当微电网系统中电池存储的电池能量不够、光伏等可再生能源提供的能量也不够时，实现从VF储能装置供电无缝切换到柴油机发电系统供电，以及当光伏等发电功率满足负载供电时，实现从柴油机发电系统供电无缝切换到VF源储能装置供电。When the power of photovoltaic power generation or wind power generation can meet the power supply requirements of the AC load 70, the VF source energy storage device 20 is started at this time, and the VF source energy storage device 20 and the diesel generator system 10 supply power simultaneously. When the system enters a stable state, the control center then controls the static transfer switch 30 to cut off the power supply of the diesel generator system 10 , and the VF source energy storage device 20 is directly connected to the power transmission and distribution line 40 . Therefore, the static transfer switch 30 can seamlessly switch from the power supply of the VF energy storage device to the power supply of the diesel engine power generation system when the battery energy stored in the battery in the microgrid system is not enough, and the energy provided by renewable energy such as photovoltaics is not enough. When the generated power meets the load power supply, seamlessly switch from the power supply of the diesel engine power generation system to the power supply of the VF source energy storage device.
此外，当柴油机发电系统供电时，VF源储能装置还用于检测柴油机发电系统的供电电压，当其供电电压不满足供电要求(例如达到额定供电电压20％以下时)，即出现供电故障时，通过该静态转换开关自动切换到VF源储能装置供电，并给出告警。In addition, when the diesel generator system supplies power, the VF source energy storage device is also used to detect the power supply voltage of the diesel generator system. , automatically switch to the VF source energy storage device for power supply through the static transfer switch, and give an alarm.
因此，实施本实用新型混合型微电网系统，通过静态转换开关实现VF源储能装置供电和柴油机发电系统供电之间的完全无缝切换，在光伏或者风力发电和电池储能足够时切换到VF源储能装置供电，关停柴油机发电系统，降低了系统运营成本，以及在光伏或风力发电和电池储能不足时切换到柴油机发电系统供电，保证了微电网的连续供电。Therefore, implementing the hybrid micro-grid system of the present utility model realizes completely seamless switching between the power supply of the VF source energy storage device and the power supply of the diesel generator system through the static transfer switch, and switches to VF when the photovoltaic or wind power generation and battery energy storage are sufficient. The source energy storage device supplies power, shuts down the diesel engine power generation system, reduces the operating cost of the system, and switches to the diesel engine power generation system for power supply when photovoltaic or wind power generation and battery energy storage are insufficient, ensuring the continuous power supply of the microgrid.
上面结合附图对本实用新型的实施例进行了描述，但是本实用新型并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本实用新型的启示下，在不脱离本实用新型宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本实用新型的保护之内。Embodiments of the present utility model have been described above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative, rather than restrictive. Under the enlightenment of the utility model, personnel can also make many forms without departing from the scope of protection of the purpose of the utility model and claims, and these all belong to the protection of the utility model.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110805A (en) * | 2018-01-26 | 2018-06-01 | 国网辽宁省电力有限公司 | A kind of system and method that New-energy power system is controlled to be run in Abnormal regulation domain |
| CN108599201A (en) * | 2018-06-07 | 2018-09-28 | 南京南瑞继保电气有限公司 | A kind of large capacity off-network type micro-capacitance sensor mixing frequency modulation method |
| CN111293777A (en) * | 2019-11-15 | 2020-06-16 | 国网浙江省电力有限公司嘉兴供电公司 | Uninterrupted power supply system and method for multi-station fusion in power operation |
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2014
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110805A (en) * | 2018-01-26 | 2018-06-01 | 国网辽宁省电力有限公司 | A kind of system and method that New-energy power system is controlled to be run in Abnormal regulation domain |
| CN108110805B (en) * | 2018-01-26 | 2022-08-09 | 国网辽宁省电力有限公司 | System and method for controlling new energy power system to operate in abnormal regulation and control domain |
| CN108599201A (en) * | 2018-06-07 | 2018-09-28 | 南京南瑞继保电气有限公司 | A kind of large capacity off-network type micro-capacitance sensor mixing frequency modulation method |
| CN111293777A (en) * | 2019-11-15 | 2020-06-16 | 国网浙江省电力有限公司嘉兴供电公司 | Uninterrupted power supply system and method for multi-station fusion in power operation |
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