CN112615381B - A distributed low-voltage distribution network terminal low-voltage control device - Google Patents
A distributed low-voltage distribution network terminal low-voltage control device Download PDFInfo
- Publication number
- CN112615381B CN112615381B CN202011452634.2A CN202011452634A CN112615381B CN 112615381 B CN112615381 B CN 112615381B CN 202011452634 A CN202011452634 A CN 202011452634A CN 112615381 B CN112615381 B CN 112615381B
- Authority
- CN
- China
- Prior art keywords
- relay
- output
- module
- bypass
- input
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims description 27
- 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 18
- 102100031786 Adiponectin Human genes 0.000 claims description 17
- 101000775469 Homo sapiens Adiponectin Proteins 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 2
- 230000002452 interceptive effect Effects 0.000 claims 1
- 230000009466 transformation Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/12—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/36—Arrangements for transfer of electric power between AC networks via a high-tension DC link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Description
技术领域technical field
本发明涉及低压配电网电压治理技术领域，尤其涉及一种分布式低压配电网末端低电压治理装置。The invention relates to the technical field of voltage control of low-voltage distribution networks, in particular to a terminal low-voltage control device of a distributed low-voltage distribution network.
背景技术Background technique
随着居民生活水平的提高，家用电器的种类和数量不断增加，对配电网电压质量的要求也成为供电企业的重要考验。《电能质量供电电压偏差》(GB/T 12325-2008)国家标准中规定，220V单相供电电压偏差为标称电压的+7％和-10％以内。但在一些较为偏远的山区和农村，配电网末端的低电压问题普遍存在，供电能力与用电需求之间的矛盾非常突出，总体呈现明显的位置性、时段性等特点。这些地区配电网的建设受负荷分布、地理环境以及经济水平等因素的影响，对低电压的治理手段非常有限。对于普通居民而言，低电压导致无法正常使用大功率电器，用电效率降低，一些电机类设备甚至存在由于低电压而导致堵转损坏的风险。对于电网而言，当传输功率一定时，低电压会导致线路传输的电流增大，变压器损耗和线路损耗增加，输电效率降低，严重时可能会造成线路跳闸。With the improvement of residents' living standards, the types and quantities of household appliances continue to increase, and the requirements for the voltage quality of distribution networks have become an important test for power supply companies. The national standard "Power Quality Supply Voltage Deviation" (GB/T 12325-2008) stipulates that the 220V single-phase power supply voltage deviation is within +7% and -10% of the nominal voltage. However, in some relatively remote mountainous areas and rural areas, the problem of low voltage at the end of the distribution network is common, and the contradiction between power supply capacity and electricity demand is very prominent, and the overall characteristics are obvious location and time period. The construction of distribution networks in these areas is affected by factors such as load distribution, geographical environment, and economic level, and the means of controlling low voltage are very limited. For ordinary residents, low voltage makes it impossible to use high-power electrical appliances normally, and the efficiency of power consumption is reduced. Some motor equipment even has the risk of stalling and damage due to low voltage. For the power grid, when the transmission power is constant, the low voltage will lead to an increase in the current transmitted by the line, the loss of the transformer and the line will increase, and the transmission efficiency will decrease. In severe cases, the line may trip.
低电压问题形成的重要原因之一是配电末端单相交流电供电线路半径长、供电线缆直径小，除线路自身存在电阻外，交流信号的传输也会在线路上产生一定的阻抗。针对上述低电压问题，目前常用的治理措施是优化改造配电线路，增加配电变压器容量。但这种方法存在施工周期长、施工成本高以及投资回报率低等问题，尤其在交通不便的山区、丘陵地带，施工难度大也是不容忽视的因素。此外，随着用电环境的提升，居民家中大功率负载的增多，改造完成的线路也可能由于用电负荷的持续增加而再次出现低电压问题。One of the important reasons for the low voltage problem is that the single-phase AC power supply line at the power distribution terminal has a long radius and a small diameter of the power supply cable. In addition to the resistance of the line itself, the transmission of the AC signal will also generate a certain impedance on the line. In view of the above-mentioned low-voltage problems, the current common treatment measures are to optimize and transform distribution lines and increase the capacity of distribution transformers. However, this method has problems such as long construction period, high construction cost and low return on investment, especially in mountainous and hilly areas with inconvenient transportation, and the difficulty of construction is also a factor that cannot be ignored. In addition, with the improvement of the power consumption environment and the increase of high-power loads in residents' homes, the reconstructed lines may also have low voltage problems again due to the continuous increase of power loads.
发明内容Contents of the invention
本发明针对现有技术存在的不足和缺陷，提供了一种分布式低压配电网末端低电压治理装置，基于现有配电网，通过电力电子变流技术，将传统的交流配电升压为直流配电，解决交流低压长距离传输的末端低电压问题，提升末端电压质量；采用升压直流配电，线路阻抗和流经电流均减小，降低线路损耗；充分利用现有配电线路，设备安装和施工方便，降低综合改造成本。Aiming at the deficiencies and defects of the existing technology, the present invention provides a distributed low-voltage distribution network terminal low-voltage control device, based on the existing distribution network, through the power electronic conversion technology, the traditional AC power distribution is boosted For DC power distribution, solve the problem of low voltage at the end of AC low-voltage long-distance transmission, and improve the quality of terminal voltage; adopt boosted DC power distribution, reduce line impedance and current, and reduce line loss; make full use of existing power distribution lines , Equipment installation and construction are convenient, reducing the cost of comprehensive transformation.
为实现上述目的，本发明提出了一种分布式低压配电网末端低电压治理装置，包括整流装置和逆变装置，其中：In order to achieve the above purpose, the present invention proposes a low-voltage control device at the end of a distributed low-voltage distribution network, including a rectifier device and an inverter device, wherein:
整流装置，用于将三相交流电升压整流成为直流电，并根据系统状态，自动在直流配电模式和旁路模式之间切换；The rectifier is used to boost and rectify the three-phase AC power into DC power, and automatically switch between the DC power distribution mode and the bypass mode according to the system status;
逆变装置，用于将直流电逆变成为单相交流电，并根据系统状态，自动在直流配电模式和旁路模式之间切换；The inverter device is used to invert the direct current into a single-phase alternating current, and automatically switch between the direct current distribution mode and the bypass mode according to the system status;
其中，整流装置的输入侧与配电网变压器输出侧三相交流电连接，输出侧与逆变装置的输入侧连接；逆变装置输入侧与整流装置的输出侧连接，输出侧与用户连接，整流装置与逆变装置通过载波通信和无线通信方式交互指令与状态信息，两种通信方式相互冗余备份。。Among them, the input side of the rectifier is connected to the three-phase AC power at the output side of the distribution network transformer, and the output side is connected to the input side of the inverter device; the input side of the inverter device is connected to the output side of the rectifier device, and the output side is connected to the user. The device and the inverter device exchange instructions and status information through carrier communication and wireless communication, and the two communication methods are mutually redundant. .
进一步地，整流装置包括三相断路器、输入载波模块、ACDC变流模块、直流继电器、旁路继电器、输出载波模块、无线通讯模块以及主控模块，其中：Further, the rectification device includes a three-phase circuit breaker, an input carrier module, an ACDC converter module, a DC relay, a bypass relay, an output carrier module, a wireless communication module and a main control module, wherein:
三相断路器，控制整流装置输入电能的通断；The three-phase circuit breaker controls the on-off of the input electric energy of the rectification device;
输入载波模块，与上行设备通信，交互信息；Input the carrier module, communicate with the uplink device, and exchange information;
ACDC变流模块，承担交流-直流电能变换功能；ACDC converter module, which undertakes the function of AC-DC power conversion;
直流继电器，控制ACDC变流模块输出直流电的通断；DC relay, which controls the on-off of the output DC of the ACDC converter module;
旁路继电器，控制旁路单相交流电的通断；The bypass relay controls the on-off of the bypass single-phase AC;
输出载波模块，与逆变装置通信，交互信息；Output the carrier module, communicate with the inverter device, and exchange information;
无线通讯模块，与逆变装置和其他远程设备通信，交互信息；The wireless communication module communicates with the inverter device and other remote equipment and exchanges information;
主控模块，作为整流装置的控制核心，实现各种模式切换控制；The main control module, as the control core of the rectification device, realizes the switching control of various modes;
其连接关系为，三相断路器的输入侧与装置三相交流电输入接口连接，输出侧与ACDC变流模块的输入侧连接，ACDC变流模块的输出侧经过直流继电器后与装置输出接口连接，三相交流电中的一相火线和零线通过旁路继电器直接与装置输出接口连接，主控模块与输入载波模块、输出载波模块以及无线通讯模块连接。The connection relationship is that the input side of the three-phase circuit breaker is connected to the three-phase AC input interface of the device, the output side is connected to the input side of the ACDC converter module, and the output side of the ACDC converter module is connected to the output interface of the device after passing through the DC relay. One-phase live wire and neutral wire in the three-phase alternating current are directly connected to the output interface of the device through a bypass relay, and the main control module is connected to the input carrier module, the output carrier module and the wireless communication module.
进一步地，逆变装置包括输入断路器、输入载波模块、直流继电器、DCDC变流模块，DCAC变流模块、交流继电器、输出载波模块、输出断路器、无线通讯模块、主控模块以及旁路继电器，其中：Further, the inverter device includes an input circuit breaker, an input carrier module, a DC relay, a DCDC converter module, a DCAC converter module, an AC relay, an output carrier module, an output circuit breaker, a wireless communication module, a main control module and a bypass relay ,in:
输入断路器，控制逆变装置输入电能的通断；The input circuit breaker controls the on-off of the input electric energy of the inverter device;
输入载波模块，与整流装置通信，交互信息；Input the carrier module, communicate with the rectifier device, and exchange information;
直流继电器，控制DCDC变流模块输入直流电的通断；DC relay, which controls the on-off of the input DC power of the DCDC converter module;
DCDC变流模块，承担直流-直流电能变换功能；DCDC converter module, responsible for DC-DC power conversion function;
DCAC变流模块，承担直流-交流电能变换功能；DCAC converter module, which undertakes the function of DC-AC power conversion;
交流继电器，控制DCAC变流模块输出交流电的通断；AC relay, to control the on-off of the output AC of the DCAC converter module;
输出载波模块，与下行设备通信，交互信息；Output the carrier module, communicate with the downlink equipment, and exchange information;
输出断路器，控制逆变装置输出电能的通断；The output circuit breaker controls the on-off of the output electric energy of the inverter device;
无线通讯模块，与整流装置和其他远程设备通信，交互信息；The wireless communication module communicates with the rectification device and other remote equipment to exchange information;
主控模块，作为逆变装置的控制核心，实现各种模式切换控制；The main control module, as the control core of the inverter device, realizes the switching control of various modes;
旁路继电器，控制旁路单相交流电的通断；The bypass relay controls the on-off of the bypass single-phase AC;
其连接关系为，输入断路器的输入侧与装置输入接口连接，输出侧经过直流继电器后与DCDC变流模块的输入侧连接，DCDC变流模块的输出侧与DCAC变流模块的输入侧连接，DCAC变流模块的输出侧经过交流继电器后与输出断路器的输入侧连接，输出断路器的输出侧与装置输出接口连接，输入断路器的输出侧通过旁路继电器与输出断路器的输入侧连接，主控模块与输入载波模块、输出载波模块以及无线通讯模块连接。The connection relationship is that the input side of the input circuit breaker is connected to the input interface of the device, the output side is connected to the input side of the DCDC converter module after passing through the DC relay, and the output side of the DCDC converter module is connected to the input side of the DCAC converter module. The output side of the DCAC converter module is connected to the input side of the output circuit breaker after passing through the AC relay, the output side of the output circuit breaker is connected to the output interface of the device, and the output side of the input circuit breaker is connected to the input side of the output circuit breaker through a bypass relay , the main control module is connected with the input carrier module, the output carrier module and the wireless communication module.
进一步地，整流装置与逆变装置之间可以通过载波通信和无线通信方式交互指令与状态信息，两种通信方式相互冗余备份。Further, the rectifying device and the inverter device can exchange instructions and status information through carrier communication and wireless communication, and the two communication methods are mutually redundant.
进一步地，整流装置与逆变装置可以根据系统状态，自动在直流配电模式和旁路模式之间切换。Further, the rectifying device and the inverter device can automatically switch between the DC power distribution mode and the bypass mode according to the system status.
进一步地，整流装置与逆变装置工作在直流配电模式时，整流装置通过电子电子变流技术将交流电升压整流为直流电，并传输至逆变装置，逆变装置通过电子电力逆变技术将直流电逆变成交流电。Furthermore, when the rectifying device and the inverter device work in the DC power distribution mode, the rectifying device boosts and rectifies the AC power into DC power through electronic electronic conversion technology, and transmits it to the inverter device, and the inverter device converts the DC power through the electronic power inverter technology. Direct current is converted into alternating current.
进一步地，整流装置与逆变装置工作在旁路模式时，通过整流装置与逆变装置的旁路继电器，直接将整流装置的输入侧与逆变装置的输出侧连接，将整流装置的输入交流电输送至用户。Further, when the rectifier and inverter work in bypass mode, the input side of the rectifier and the output side of the inverter are directly connected through the bypass relays of the rectifier and inverter, and the input AC of the rectifier sent to the user.
本发明的有益技术效果：通过分布式低压配电网末端低电压治理装置，可充分利用现有配电线路，无需重新铺设线缆，通过交流-直流-交流变换技术，可以显著缩短单相交流配电线路长度，减小线路压降，提升末端电压质量；将低压交流配电升压为直流配电后，线路阻抗降低，线路流经电流减小，可以显著降低线路损耗；装置安装方便，可充分利用现有配电线路，无需重新铺设线缆，节省综合改造成本。Beneficial technical effects of the present invention: through the low-voltage management device at the end of the distributed low-voltage distribution network, the existing distribution lines can be fully utilized without re-laying cables, and the single-phase AC can be significantly shortened through the AC-DC-AC conversion technology. The length of the distribution line reduces the voltage drop of the line and improves the quality of the terminal voltage; after the low-voltage AC power distribution is boosted to DC power distribution, the line impedance is reduced, and the current flowing through the line is reduced, which can significantly reduce the line loss; the device is easy to install, It can make full use of the existing power distribution lines without re-laying cables, saving the cost of comprehensive transformation.
附图说明Description of drawings
图1是本发明分布式低压配电网末端低电压治理装置的整体连接示意图。Fig. 1 is a schematic diagram of the overall connection of the terminal low-voltage control device of the distributed low-voltage distribution network of the present invention.
图2是本发明分布式低压配电网末端低电压治理装置的整流装置内部结构示意图。Fig. 2 is a schematic diagram of the internal structure of the rectification device of the low-voltage control device at the end of the distributed low-voltage distribution network of the present invention.
图3是本发明分布式低压配电网末端低电压治理装置的逆变装置内部结构示意图。Fig. 3 is a schematic diagram of the internal structure of the inverter device of the terminal low-voltage control device of the distributed low-voltage distribution network of the present invention.
图4是本发明分布式低压配电网末端低电压治理装置的正常启动流程图。Fig. 4 is a flow chart of the normal start-up of the terminal low-voltage control device of the distributed low-voltage distribution network of the present invention.
图5是本发明分布式低压配电网末端低电压治理装置的整流装置异常处理流程图。Fig. 5 is a flow chart of the abnormality handling of the rectifier device of the terminal low-voltage control device of the distributed low-voltage distribution network of the present invention.
图6是本发明分布式低压配电网末端低电压治理装置的逆变装置异常处理流程图。Fig. 6 is a flow chart of the abnormal processing of the inverter device of the terminal low-voltage control device of the distributed low-voltage distribution network of the present invention.
图7是本发明分布式低压配电网末端低电压治理装置的异常恢复流程图。Fig. 7 is a flowchart of abnormal recovery of the terminal low-voltage control device of the distributed low-voltage distribution network of the present invention.
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不限定本发明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
本发明的一种分布式低压配电网末端低电压治理装置，如图1所示，包括整流装置和逆变装置，整流装置位置靠近变压器侧，逆变装置位置靠近用户侧，当工作于直流配电模式时，整流装置将变压器输出的三相交流电升压整流成为直流电，通过既有配电线路，传送至逆变装置侧，逆变装置将直流电逆变成为单相交流电，通过既有配电线路，传送至用户。A low-voltage control device at the end of a distributed low-voltage distribution network of the present invention, as shown in Figure 1, includes a rectifier device and an inverter device, the rectifier device is located close to the transformer side, and the inverter device is located close to the user side. In power distribution mode, the rectifier device boosts and rectifies the three-phase AC power output by the transformer into DC power, and transmits it to the inverter side through the existing power distribution line. wires to the user.
整流装置内部结构如图2所示，包括三相断路器、输入载波模块、ACDC变流模块、直流继电器、旁路继电器、输出载波模块、无线通讯模块以及主控模块。The internal structure of the rectifier device is shown in Figure 2, including three-phase circuit breaker, input carrier module, ACDC converter module, DC relay, bypass relay, output carrier module, wireless communication module and main control module.
三相断路器控制整流装置输入电能的通断。The three-phase circuit breaker controls the on-off of the input electric energy of the rectification device.
主控模块作为整流装置的控制核心，通过输入载波模块与上行其他设备通讯，通过输出载波模块和无线通讯模块与逆变装置通讯，交互控制指令以及状态信息。As the control core of the rectifier device, the main control module communicates with other upstream equipment through the input carrier module, communicates with the inverter device through the output carrier module and wireless communication module, and exchanges control commands and status information.
主控模块根据系统工作状态控制直流继电器和旁路继电器的开通和关断。The main control module controls the opening and closing of the DC relay and the bypass relay according to the working state of the system.
ACDC变流模块承担交流-直流电能变换功能，将输入三相交流电升压整流成直流电。The ACDC converter module undertakes the function of AC-DC power conversion, and boosts and rectifies the input three-phase AC power into DC power.
逆变装置内部结构如图3所示，包括输入断路器、输入载波模块、直流继电器、DCDC变流模块，DCAC变流模块、交流继电器、输出载波模块、输出断路器、无线通讯模块、主控模块以及旁路继电器。The internal structure of the inverter device is shown in Figure 3, including input circuit breaker, input carrier module, DC relay, DCDC converter module, DCAC converter module, AC relay, output carrier module, output circuit breaker, wireless communication module, main control module and bypass relay.
输入断路器控制逆变装置输入电能的通断，输出断路器控制逆变装置输出电能的通断。The input circuit breaker controls the on-off of the input electric energy of the inverter device, and the output circuit breaker controls the on-off of the output electric energy of the inverter device.
主控模块作为逆变装置的控制核心，可以通过输入载波模块和无线通讯模块与整流装置通讯，交互控制指令以及状态信息，通过输出载波模块与用户电表通讯，完成抄表功能。As the control core of the inverter device, the main control module can communicate with the rectifier device through the input carrier module and wireless communication module, exchange control commands and status information, and communicate with the user's meter through the output carrier module to complete the meter reading function.
DCDC变流模块承担直流-直流电能变换功能，将DCDC变流模块的输入直流电变换成DCAC变流模块需要的输入直流电。The DCDC converter module undertakes the DC-DC power conversion function, and converts the input DC power of the DCDC converter module into the input DC power required by the DCAC converter module.
DCAC变流模块承担直流-交流电能变换功能，将输入直流电逆变成用户需要的单相交流电。The DCAC converter module undertakes the function of DC-AC power conversion, and inverts the input DC power into the single-phase AC power required by users.
分布式低压配电网末端低电压治理装置的正常启动流程如图4所示：The normal start-up process of the low-voltage control device at the end of the distributed low-voltage distribution network is shown in Figure 4:
当闭合逆变装置的输入断路器和输出断路器以及整流装置的三相断路器后，整流装置上电自检，判断ACDC变流模块状态正常以及所有继电器均处于断开状态后，闭合旁路继电器。After closing the input circuit breaker and output circuit breaker of the inverter device and the three-phase circuit breaker of the rectifier device, the rectifier device is powered on and self-inspected, and after judging that the ACDC converter module is in normal state and all relays are off, close the bypass relay.
逆变装置上电自检，并与整流装置交互状态。The inverter device self-checks when it is powered on, and interacts with the rectifier device.
整流装置确认可以切换至直流供电模式后，断开旁路继电器，逆变装置断电，然后整流装置闭合直流继电器，并控制ACDC变流模块输出直流电。After the rectifier device confirms that it can switch to the DC power supply mode, the bypass relay is disconnected, the inverter device is powered off, and then the rectifier device closes the DC relay and controls the ACDC converter module to output DC power.
逆变装置重新上电自检，并与整流装置交互状态，确认进入直流配电模式后，闭合直流继电器。The inverter device re-energizes and self-checks, and interacts with the rectifier device. After confirming that it has entered the DC power distribution mode, close the DC relay.
逆变装置控制DCDC变流模块输出直流电，待输出电压稳定后，控制DCAC变流模块输出单相交流电，待启动完成且稳定输出后，闭合交流继电器，系统进入直流配电模式。The inverter device controls the DCDC converter module to output direct current. After the output voltage is stable, it controls the DCAC converter module to output single-phase alternating current. After the startup is completed and the output is stable, the AC relay is closed, and the system enters the DC power distribution mode.
当分布式低压配电网末端低电压治理装置处于直流配电运行模式时，如果整流装置检测到自身故障，分布式低压配电网末端低电压治理装置可以由直流配电模式进入旁路模式，如图5所示：When the low-voltage control device at the end of the distributed low-voltage distribution network is in the DC distribution operation mode, if the rectifier detects its own fault, the low-voltage control device at the end of the distributed low-voltage distribution network can enter the bypass mode from the DC distribution mode, As shown in Figure 5:
整流装置断开直流继电器，逆变装置断电，然后整流装置闭合旁路继电器。The rectifier disconnects the DC relay, the inverter de-energizes, and then the rectifier closes the bypass relay.
逆变装置上电自检，并与整流装置交互状态。当逆变装置确认进入旁路模式后，闭合旁路继电器，系统完成模式切换，进入旁路模式。The inverter device self-checks when it is powered on, and interacts with the rectifier device. When the inverter device confirms to enter the bypass mode, it closes the bypass relay, and the system completes the mode switching and enters the bypass mode.
当分布式低压配电网末端低电压治理装置处于直流配电运行模式时，如果逆变装置检测到自身故障，分布式低压配电网末端低电压治理装置可以由直流配电模式进入旁路模式，如图6所示：When the low-voltage control device at the end of the distributed low-voltage distribution network is in the DC distribution operation mode, if the inverter device detects its own fault, the low-voltage control device at the end of the distributed low-voltage distribution network can enter the bypass mode from the DC distribution mode ,As shown in Figure 6:
逆变装置断开交流继电器和直流继电器。The inverter device disconnects the AC relay and the DC relay.
整流装置与逆变装置交互状态，并确认进入旁路模式后，整流装置断开直流继电器，逆变装置断电，然后整流装置闭合旁路继电器。After the rectifier and the inverter interact with each other and confirm that they are in bypass mode, the rectifier disconnects the DC relay, the inverter is powered off, and then the rectifier closes the bypass relay.
逆变装置上电自检，并与整流装置交互状态。当逆变装置确认进入旁路模式后，闭合旁路继电器，系统完成模式切换，进入旁路模式。The inverter device self-checks when it is powered on, and interacts with the rectifier device. When the inverter device confirms to enter the bypass mode, it closes the bypass relay, and the system completes the mode switching and enters the bypass mode.
当分布式低压配电网末端低电压治理装置处于旁路运行模式时，如果整流装置和逆变装置故障均恢复，分布式低压配电网末端低电压治理装置可以由旁路模式进入直流配电模式，如图7所示。When the low-voltage control device at the end of the distributed low-voltage distribution network is in the bypass operation mode, if the faults of the rectifier device and the inverter device are recovered, the low-voltage control device at the end of the distributed low-voltage distribution network can enter the DC power distribution from the bypass mode mode, as shown in Figure 7.
逆变装置断开旁路继电器，整流装置断开旁路继电器，逆变装置断电。The inverter device disconnects the bypass relay, the rectifier device disconnects the bypass relay, and the inverter device is powered off.
整流装置闭合直流继电器，控制ACDC变流模块输出直流电。The rectifier device closes the DC relay to control the ACDC converter module to output DC power.
逆变装置上电自检，并与整流装置交互状态，确认进入直流配电模式后，闭合直流继电器。The inverter device self-checks when it is powered on, and interacts with the rectifier device. After confirming that it has entered the DC power distribution mode, close the DC relay.
逆变装置控制DCDC变流模块输出直流电，待输出电压稳定后，控制DCAC变流模块输出单相交流电，待启动完成且稳定输出后，闭合交流继电器，系统完成模式切换，进入直流配电模式。The inverter device controls the DCDC converter module to output direct current. After the output voltage is stable, it controls the DCAC converter module to output single-phase alternating current. After the startup is completed and the output is stable, the AC relay is closed, and the system completes the mode switching and enters the DC power distribution mode.
上述实施例是对本发明的具体实施方式的说明，而非对本发明的限制，有关技术领域的技术人员在不脱离本发明的精神和范围的情况下，还可做出各种变换和变化以得到相对应的等同的技术方案，因此所有等同的技术方案均应归入本发明的专利保护范围。The foregoing embodiments are descriptions of specific implementations of the present invention, rather than limitations of the present invention. Those skilled in the art may also make various transformations and changes without departing from the spirit and scope of the present invention to obtain Corresponding equivalent technical solutions, therefore all equivalent technical solutions should fall into the patent protection scope of the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011452634.2A CN112615381B (en) | 2020-12-12 | 2020-12-12 | A distributed low-voltage distribution network terminal low-voltage control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011452634.2A CN112615381B (en) | 2020-12-12 | 2020-12-12 | A distributed low-voltage distribution network terminal low-voltage control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112615381A CN112615381A (en) | 2021-04-06 |
| CN112615381B true CN112615381B (en) | 2023-08-15 |
Family
ID=75233659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011452634.2A Active CN112615381B (en) | 2020-12-12 | 2020-12-12 | A distributed low-voltage distribution network terminal low-voltage control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112615381B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595087A (en) * | 2021-07-08 | 2021-11-02 | 国网西藏电力有限公司 | Be applied to terminal voltage that plateau area has trend control and administers device |
| CN113595088A (en) * | 2021-07-08 | 2021-11-02 | 国网西藏电力有限公司 | Be applied to terminal low-voltage of dilatation of plateau area and administer device |
| CN113659721A (en) * | 2021-08-18 | 2021-11-16 | 国网湖南省电力有限公司 | Module Synchronization Method Applied to Symmetric Bridge Voltage Regulator |
| CN113507221A (en) * | 2021-08-20 | 2021-10-15 | 青岛鼎信通讯股份有限公司 | Be applied to rectification contravariant equipment that low voltage administered |
| CN113489349B (en) * | 2021-08-20 | 2023-10-24 | 青岛鼎信通讯股份有限公司 | Control method of voltage equalizing circuit of low-voltage treatment device at tail end of low-voltage distribution network |
| CN113675829B (en) * | 2021-09-01 | 2024-01-12 | 青岛鼎信通讯股份有限公司 | A DC short-circuit fault current limiting circuit for low voltage management device and its control method |
| CN113644661B (en) * | 2021-09-01 | 2024-01-12 | 青岛鼎信通讯股份有限公司 | Low-voltage control parallel compensation device at tail end of low-voltage distribution network |
| CN114844046A (en) * | 2022-05-10 | 2022-08-02 | 青岛鼎信通讯股份有限公司 | A multi-machine parallel carrier synchronization control method for a terminal low-voltage management device |
| CN115021306B (en) * | 2022-06-06 | 2024-05-14 | 国网福建省电力有限公司 | A flexible DC voltage regulation output device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020054029A (en) * | 2000-12-27 | 2002-07-06 | 신현준 | Instantaneous Voltage Dip Compensator Using Bypass Switch |
| RU2337450C1 (en) * | 2007-11-09 | 2008-10-27 | Федеральное государственное учреждение 16 Центральный научно-исследовательский испытательный институт Министерства обороны Российской Федерации имени маршала войск связи А.И. Белова | Method of power supply of low voltage loads of dc power, which are remote from power supply sources |
| CN102313856A (en) * | 2010-06-30 | 2012-01-11 | 北京泰优美科技有限责任公司 | Intelligent 10kV power line state sensor |
| CN204012741U (en) * | 2014-06-04 | 2014-12-10 | 四川合创科技发展有限公司 | A kind of power transmission system |
| CN208986607U (en) * | 2018-11-16 | 2019-06-14 | 国网山西省电力公司临汾供电公司 | A low-voltage control system for three-phase lines of low-voltage distribution network |
| CN209233475U (en) * | 2019-01-25 | 2019-08-09 | 陕西金源自动化科技有限公司 | A low voltage line voltage regulator |
| WO2019170040A1 (en) * | 2018-03-05 | 2019-09-12 | 南京南瑞继保电气有限公司 | Control method and device for multi-terminal direct current power transmission system during inter-station communication fault |
| CN110739701A (en) * | 2019-10-25 | 2020-01-31 | 贵州电网有限责任公司 | A low-voltage distribution network line low-voltage governance system and governance method |
| CN111404175A (en) * | 2020-05-07 | 2020-07-10 | 国网湖南省电力有限公司 | Comprehensive treatment device and control method for low-voltage power quality of power distribution station area |
| CN111541228A (en) * | 2020-05-07 | 2020-08-14 | 国网湖南省电力有限公司 | Device and method for modulating electric energy parameters of low-voltage line tail end of power distribution station area |
-
2020
- 2020-12-12 CN CN202011452634.2A patent/CN112615381B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020054029A (en) * | 2000-12-27 | 2002-07-06 | 신현준 | Instantaneous Voltage Dip Compensator Using Bypass Switch |
| RU2337450C1 (en) * | 2007-11-09 | 2008-10-27 | Федеральное государственное учреждение 16 Центральный научно-исследовательский испытательный институт Министерства обороны Российской Федерации имени маршала войск связи А.И. Белова | Method of power supply of low voltage loads of dc power, which are remote from power supply sources |
| CN102313856A (en) * | 2010-06-30 | 2012-01-11 | 北京泰优美科技有限责任公司 | Intelligent 10kV power line state sensor |
| CN204012741U (en) * | 2014-06-04 | 2014-12-10 | 四川合创科技发展有限公司 | A kind of power transmission system |
| WO2019170040A1 (en) * | 2018-03-05 | 2019-09-12 | 南京南瑞继保电气有限公司 | Control method and device for multi-terminal direct current power transmission system during inter-station communication fault |
| CN208986607U (en) * | 2018-11-16 | 2019-06-14 | 国网山西省电力公司临汾供电公司 | A low-voltage control system for three-phase lines of low-voltage distribution network |
| CN209233475U (en) * | 2019-01-25 | 2019-08-09 | 陕西金源自动化科技有限公司 | A low voltage line voltage regulator |
| CN110739701A (en) * | 2019-10-25 | 2020-01-31 | 贵州电网有限责任公司 | A low-voltage distribution network line low-voltage governance system and governance method |
| CN111404175A (en) * | 2020-05-07 | 2020-07-10 | 国网湖南省电力有限公司 | Comprehensive treatment device and control method for low-voltage power quality of power distribution station area |
| CN111541228A (en) * | 2020-05-07 | 2020-08-14 | 国网湖南省电力有限公司 | Device and method for modulating electric energy parameters of low-voltage line tail end of power distribution station area |
Non-Patent Citations (1)
| Title |
|---|
| 龚全超.杨城子农村配电网低电压治理方法研究.中国优秀硕士学位论文全文数据库 (工程科技Ⅱ辑).2018,第2018年卷(第12月期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112615381A (en) | 2021-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112615381B (en) | A distributed low-voltage distribution network terminal low-voltage control device | |
| CN107681672A (en) | The interactive approach of charging pile interactive terminal and charging pile access power network | |
| CN110137936B (en) | A building low voltage direct current power supply system | |
| CN113644661B (en) | Low-voltage control parallel compensation device at tail end of low-voltage distribution network | |
| CN106786594A (en) | A kind of alternating current-direct current mixing distribution system containing important load | |
| CN209233475U (en) | A low voltage line voltage regulator | |
| CN206149148U (en) | A railway traction power supply system based on photovoltaic power generation | |
| CN106411148B (en) | A kind of Traction Substation of Electric Railway hands over straight friendship type power supply system structure from electricity consumption | |
| Kester et al. | A smart MV/LV-station that improves power quality, reliability and substation load profile | |
| CN203301215U (en) | Movable-type comprehensive compensation system for low-voltage line | |
| CN112885581A (en) | Flexible traction transformer structure | |
| CN111769568A (en) | A system and method for realizing power supply radius extension suitable for areas with sparse loads | |
| CN215417812U (en) | Flexible traction transformer structure | |
| CN113595088A (en) | Be applied to terminal low-voltage of dilatation of plateau area and administer device | |
| CN101478165A (en) | Three phase power compensator for electrical railway | |
| CN209823504U (en) | Automatic switching system for control power supply of low-voltage contact cabinet | |
| CN208782738U (en) | It is a kind of based on magnetic switch control distributed electrical source device, charging pile, charger, protection circuit device | |
| CN107769211A (en) | A kind of twin voltage grade alternating current-direct current mixes distribution system | |
| CN220190471U (en) | A low-voltage control device at the end of low-voltage distribution network | |
| CN114336718A (en) | Three-pole low-voltage direct-current power distribution system | |
| CN112510741A (en) | Power grid side energy storage equipment | |
| CN207910471U (en) | A kind of hybrid AC/DC power transmission systems containing specific load | |
| CN207705784U (en) | A kind of energy saver for transformer in solar power plant | |
| CN114285035B (en) | Device and method for preventing power supply of station service system of power plant from being connected in series | |
| CN218456323U (en) | Voltage source for converting single-phase electricity into three-phase electricity |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20241127 Address after: No. 858, Huaguan Road, high tech Zone, Qingdao, Shandong Province 266000 Patentee after: QINGDAO TOPSCOMM COMMUNICATION Co.,Ltd. Country or region after: China Patentee after: QINGDAO DINGJUN ELECTRIC Co.,Ltd. Address before: 266000 12th floor, 4b building, 858 Huaguan Road, high tech Zone, Qingdao City, Shandong Province Patentee before: QINGDAO TOPSCOMM COMMUNICATION Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 858, Huaguan Road, high tech Zone, Qingdao, Shandong Province 266000 Patentee after: QINGDAO TOPSCOMM COMMUNICATION Co.,Ltd. Country or region after: China Patentee after: Qingdao Zhidian New Energy Technology Co.,Ltd. Patentee after: QINGDAO DINGJUN ELECTRIC Co.,Ltd. Address before: No. 858, Huaguan Road, high tech Zone, Qingdao, Shandong Province 266000 Patentee before: QINGDAO TOPSCOMM COMMUNICATION Co.,Ltd. Country or region before: China Patentee before: QINGDAO DINGJUN ELECTRIC Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 858, Huaguan Road, high tech Zone, Qingdao, Shandong Province 266000 Patentee after: QINGDAO TOPSCOMM COMMUNICATION Co.,Ltd. Country or region after: China Patentee after: Qingdao Zhidian New Energy Technology Co.,Ltd. Patentee after: Qingdao Tuowei Technology Co.,Ltd. Address before: No. 858, Huaguan Road, high tech Zone, Qingdao, Shandong Province 266000 Patentee before: QINGDAO TOPSCOMM COMMUNICATION Co.,Ltd. Country or region before: China Patentee before: Qingdao Zhidian New Energy Technology Co.,Ltd. Patentee before: QINGDAO DINGJUN ELECTRIC Co.,Ltd. |