CN207518272U - A kind of low-voltage intelligent idle compensating control - Google Patents
A kind of low-voltage intelligent idle compensating control Download PDFInfo
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Abstract
本实用新型涉及一种低压智能无功补偿控制器包括：交流采集电路、主控制器、隔离RS485通信芯片、RS485接口板、无功补偿装置、电压匹配电路、GPRS通信电路。交流采集电路与主控制器相连；交流采集电路包括第一AD采集芯片和第二AD采集芯片；第二AD采集芯片通过电流互感器与无功补偿电路相连采集无功补偿电路的补偿电流；第一AD采集芯片通过电压电流互感器与AC/DC电源相连采集配电网的电压电流；隔离RS485通信芯片与主控制器相连通过隔离RS485通信芯片和RS485芯片接收来自主控制器的信号；电压匹配电路包括与配电网三相电相连的AC/DC电源模块，AC/DC电源与主控制器相连；GPRS通信电路与主控制器相连。本实用新型集成了补偿柜补偿电流的采集与显示，减少了补偿柜仪表的投入。
The utility model relates to a low-voltage intelligent reactive power compensation controller, which comprises: an AC acquisition circuit, a main controller, an isolated RS485 communication chip, an RS485 interface board, a reactive power compensation device, a voltage matching circuit and a GPRS communication circuit. The AC acquisition circuit is connected to the main controller; the AC acquisition circuit includes a first AD acquisition chip and a second AD acquisition chip; the second AD acquisition chip is connected to the reactive power compensation circuit through a current transformer to collect the compensation current of the reactive power compensation circuit; An AD acquisition chip is connected to the AC/DC power supply through a voltage and current transformer to collect the voltage and current of the distribution network; the isolated RS485 communication chip is connected to the main controller to receive the signal from the main controller through the isolated RS485 communication chip and the RS485 chip; voltage matching The circuit includes an AC/DC power supply module connected with the three-phase power distribution network, the AC/DC power supply is connected with the main controller; the GPRS communication circuit is connected with the main controller. The utility model integrates the acquisition and display of the compensation current of the compensation cabinet, and reduces the investment of the compensation cabinet instrument.
Description
技术领域technical field
本实用新型涉及无功补偿技术领域，尤其涉及一种低压智能无功补偿控制器。The utility model relates to the technical field of reactive power compensation, in particular to a low-voltage intelligent reactive power compensation controller.
背景技术Background technique
随着国家的发展，企业的用电需求也在不断的增加，高负荷用电的同时也带来了大量的无功消耗，无功补偿装置已是企业用电中的必要设备。目前市场上多为本地型低压无功补偿控制器，通过交流采集电路，计算出电压、电流、功率因数、2-13次谐波数据，通过总线通信电路与补偿装置连接，从而控制低压无功补偿装置的投切。这样传统的无功补偿控制器无法实时获取到用电现场的数据，无法实时获取到现场控制器及补偿装置的运行状态，用户无法知道现场设备是由于哪种问题造成的不工作，是设备本身损坏还是达到了使用设备，无法实时知道是否需要增加、更换补偿装置。另外补偿柜需另行安装电流表才能了解补偿电流值，无形中增加了成本投入。With the development of the country, the power demand of enterprises is also increasing. The high-load power consumption also brings a lot of reactive power consumption. The reactive power compensation device has become a necessary equipment in the power consumption of enterprises. At present, most of the local low-voltage reactive power compensation controllers on the market calculate the voltage, current, power factor, and 2-13th harmonic data through the AC acquisition circuit, and connect with the compensation device through the bus communication circuit to control the low-voltage reactive power. Switching of the compensation device. In this way, the traditional reactive power compensation controller cannot obtain the data of the power consumption site in real time, and cannot obtain the operating status of the site controller and compensation device in real time. The user cannot know what kind of problem the site equipment is causing. The damage still reaches the equipment in use, and it is impossible to know in real time whether it is necessary to add or replace the compensation device. In addition, the compensation cabinet needs to install an ammeter separately to know the compensation current value, which virtually increases the cost input.
现有技术申请号 201610826686.9发明名称为：一种远程监控无功补偿控制器，公布了一种无功补偿控制器：包括：交流采集电路、微控制器、无功补偿装置、电平匹配电路、远程无线通信电路和后台服务器；微控制器，将采集的数据分析处理后，进行无功补偿控制；远程无线通信电路，将微控制器分析处理的数据以及无功补偿装置的工作状态上传至后台服器。本发明将无线通信技术与硬件设备结合，应用到无功补偿控制器中，再依靠后台服务器把用户的用电环境、无功补偿装置的工作状态实时展现给用户和电力部门，用户和电力部门可以根据后台服务器分析出现场采集的无功缺失的实际情况，来确定现在已工作的设备是否需要增加、更换。但是本发明还是存在体积大，需要另行安装电流表才能了解补偿的电流值的问题。The existing technology application number 201610826686.9 is called: a remote monitoring reactive power compensation controller, and a reactive power compensation controller is announced: including: AC acquisition circuit, microcontroller, reactive power compensation device, level matching circuit, Remote wireless communication circuit and background server; microcontroller, after analyzing and processing the collected data, perform reactive power compensation control; remote wireless communication circuit, upload the data analyzed and processed by microcontroller and the working status of reactive power compensation device to the background server. The present invention combines wireless communication technology with hardware equipment, applies it to the reactive power compensation controller, and then relies on the background server to display the user's power consumption environment and the working status of the reactive power compensation device to the user and the power department in real time, and the user and the power department It can be determined whether the currently working equipment needs to be added or replaced according to the actual situation of the lack of reactive power collected on-site analyzed by the background server. However, the present invention still has the problem that the volume is large, and an ammeter needs to be installed separately to know the compensated current value.
发明内容Contents of the invention
1、所要解决的技术问题：1. Technical problems to be solved:
针对现有技术存在的问题，本实用新型提供一种低压智能无功补偿控制器来控制智能电容器补偿，避免过补和投切震荡，提高整套无功补偿系统的使用寿命。该控制器采用GPRS远程通讯，解决上述管理人员无法及时了解无功补偿系统的工作情况；采用两路进行分别采集补偿电路的信息与配电网电路的信息，减少能耗；采用具有计量功能的采集芯片从而集成补偿柜补偿电流采集及显示，减少补偿柜相应表头投入。Aiming at the problems existing in the prior art, the utility model provides a low-voltage intelligent reactive power compensation controller to control intelligent capacitor compensation, avoid overcompensation and switching oscillation, and improve the service life of the entire reactive power compensation system. The controller uses GPRS remote communication to solve the problem that the above-mentioned managers cannot know the working conditions of the reactive power compensation system in time; it uses two channels to separately collect the information of the compensation circuit and the information of the distribution network circuit to reduce energy consumption; The acquisition chip integrates the compensation current collection and display of the compensation cabinet, reducing the input of the corresponding meter head of the compensation cabinet.
2、技术方案：2. Technical solution:
一种低压智能无功补偿控制器，包括：交流采集电路、主控制器、隔离RS485通信芯片、RS485接口板、无功补偿装置、电压匹配电路、GPRS通信电路；其特征在于：A low-voltage intelligent reactive power compensation controller, comprising: an AC acquisition circuit, a main controller, an isolated RS485 communication chip, an RS485 interface board, a reactive power compensation device, a voltage matching circuit, and a GPRS communication circuit; it is characterized in that:
所述电压匹配电路包括AC/DC电源模块，所述AC/DC电源与配电网三相电相连，所述AC/DC电源与主控制器相连。The voltage matching circuit includes an AC/DC power supply module, the AC/DC power supply is connected to the three-phase power distribution network, and the AC/DC power supply is connected to the main controller.
所述交流采集电路与主控制器相连；所述交流采集电路包括第一AD采集芯片和第二AD采集芯片；所述第二AD采集芯片的输入端通过电流互感器与无功补偿电路相连从而实现采集无功补偿电路的补偿电流信息；所述第一AD采集芯片的输入端通过电压电流互感器与AC/DC电源相连从而实现采集配电网的电压电流信息。The AC acquisition circuit is connected with the main controller; the AC acquisition circuit includes a first AD acquisition chip and a second AD acquisition chip; the input end of the second AD acquisition chip is connected with a reactive power compensation circuit through a current transformer so that Realize the collection of compensation current information of the reactive power compensation circuit; the input terminal of the first AD collection chip is connected to the AC/DC power supply through a voltage and current transformer so as to realize the collection of voltage and current information of the distribution network.
所述隔离RS485通信芯片与主控制器相连；隔离RS485通信芯片与RS485接口板相连；所述无功补偿装置通过隔离RS485通信芯片和RS485芯片接收来自主控制器的信号。The isolated RS485 communication chip is connected to the main controller; the isolated RS485 communication chip is connected to the RS485 interface board; the reactive power compensation device receives signals from the main controller through the isolated RS485 communication chip and the RS485 chip.
所述GPRS通信电路与主控制器相连。The GPRS communication circuit is connected with the main controller.
本装置对电路信号的采集分为两路，其中一路是采集配电网的电路信息；另一路为采集无功补偿电路的电路信息，并且在本装置的输出装置中显示出来，从而在补偿柜不需安装电流表。The collection of circuit signals by this device is divided into two ways, one of which is to collect circuit information of the distribution network; There is no need to install an ammeter.
进一步地，还包括LCD液晶显示模块和按键输入模块；所述LCD液晶显示模块和按键输入模块均与主控制器相连。本控制器按键与128*64的LCD进行人机交互，可查询配电网络的相关信息，查询网络上电容器的信息与状态和参数的查询与设置，所有参数都存放于存储模块中。Further, it also includes an LCD liquid crystal display module and a key input module; the LCD liquid crystal display module and the key input module are both connected to the main controller. The buttons of the controller interact with the 128*64 LCD for human-computer interaction, and can query the relevant information of the power distribution network, query the information and status of capacitors on the network, and query and set parameters. All parameters are stored in the storage module.
进一步地，还包括与主控制器相连的存储模块；所述存储模块为24LC08的EEPROM。Further, it also includes a storage module connected to the main controller; the storage module is 24LC08 EEPROM.
进一步地，所述AC/DC电源模块产生4V的供电电源，直接供给GPRS通信模块；同时所述AC/DC电源模块产生3.3V的电压供给系统其他模块。Further, the AC/DC power supply module generates a 4V power supply, which is directly supplied to the GPRS communication module; at the same time, the AC/DC power supply module generates a 3.3V voltage to supply other modules of the system.
进一步地，所述第一AD采集芯片和第二AD采集芯片为ATT7022EU芯片。本控制器采用2片三相的电能计量芯片ATT7022EU来采集配电信息，该集成电路采用SPI接口进行通信，其中一片用于采集三相电压、三相电流、三相有功功率、合相有功功率、三相无功功率、合相无功功率、三相视在功率、合相视在功率、三相功率因数和合相功率因数，且读取集成电路的采集的电压电流ADC，通过傅里叶计算书三相的电压3~17次谐波及其总畸变率和三相的电流3~17次谐波及其总畸变率；另一片则用于采集补偿柜的补偿电流。Further, the first AD acquisition chip and the second AD acquisition chip are ATT7022EU chips. This controller uses two three-phase electric energy metering chips ATT7022EU to collect power distribution information. The integrated circuit uses SPI interface for communication, one of which is used to collect three-phase voltage, three-phase current, three-phase active power, and combined phase active power. , Three-phase reactive power, combined-phase reactive power, three-phase apparent power, combined-phase apparent power, three-phase power factor and combined-phase power factor, and read the voltage and current ADC collected by the integrated circuit, through Fourier Calculate the 3rd to 17th harmonic of the three-phase voltage and its total distortion rate and the 3rd to 17th harmonic of the three-phase current and its total distortion rate; the other piece is used to collect the compensation current of the compensation cabinet.
3、有益效果：3. Beneficial effects:
（1）该控制器采用GPRS远程通讯，解决上述管理人员无法及时了解无功补偿系统的工作情况。(1) The controller adopts GPRS remote communication to solve the problem that the above-mentioned management personnel cannot keep abreast of the working conditions of the reactive power compensation system.
（2）本控制器采用2片三相的电能计量芯片ATT7022EU来采集配电信息，从而集成了补偿柜补偿电流的采集与显示，减少了补偿柜仪表的投入。(2) This controller uses two three-phase electric energy metering chips ATT7022EU to collect power distribution information, thus integrating the collection and display of compensation current in the compensation cabinet, reducing the investment in the compensation cabinet instrument.
附图说明Description of drawings
图1本实用新型的结构示意图。Fig. 1 is the structural representation of the utility model.
具体实施方式Detailed ways
下面结合附图对本实用新型进行说明。Below in conjunction with accompanying drawing, the utility model is described.
如附图1所示1.一种低压智能无功补偿控制器，包括：交流采集电路、主控制器、隔离RS485通信芯片、RS485接口板、无功补偿装置、电压匹配电路、GPRS通信电路。 所述电压匹配电路包括AC/DC电源模块，所述AC/DC电源与配电网三相电相连，所述AC/DC电源与主控制器相连。所述交流采集电路与主控制器相连；所述交流采集电路包括第一AD采集芯片和第二AD采集芯片；所述第二AD采集芯片的输入端通过电流互感器与无功补偿电路相连从而实现采集无功补偿电路的补偿电流信息；所述第一AD采集芯片的输入端通过电压电流互感器与AC/DC电源相连从而实现采集配电网的电压电流信息。所述隔离RS485通信芯片与主控制器相连；隔离RS485通信芯片与RS485接口板相连；所述无功补偿装置通过隔离RS485通信芯片和RS485芯片接收来自主控制器的信号。所述GPRS通信电路与主控制器相连。As shown in Figure 1 1. A low-voltage intelligent reactive power compensation controller, including: AC acquisition circuit, main controller, isolated RS485 communication chip, RS485 interface board, reactive power compensation device, voltage matching circuit, GPRS communication circuit. The voltage matching circuit includes an AC/DC power supply module, the AC/DC power supply is connected to the three-phase power distribution network, and the AC/DC power supply is connected to the main controller. The AC acquisition circuit is connected with the main controller; the AC acquisition circuit includes a first AD acquisition chip and a second AD acquisition chip; the input end of the second AD acquisition chip is connected with a reactive power compensation circuit through a current transformer so that Realize the collection of compensation current information of the reactive power compensation circuit; the input terminal of the first AD collection chip is connected to the AC/DC power supply through a voltage and current transformer so as to realize the collection of voltage and current information of the distribution network. The isolated RS485 communication chip is connected to the main controller; the isolated RS485 communication chip is connected to the RS485 interface board; the reactive power compensation device receives signals from the main controller through the isolated RS485 communication chip and the RS485 chip. The GPRS communication circuit is connected with the main controller.
本实用新型的工作原理是： MCU主控单元通过第一AD采集芯片采集的配电网三相电信息和电压电流的ADC值，来获取配电网功率因数、电压、电流、有功和无功等数据，其中ADC值用来计算电压和电流谐波为过谐波保护提供依据；通过电网的功率因数与控制所设置的目标功率因数区间来计算当前电网环境是需要投入或者切除电容器，在网络组找符合相应动作的电容器，通过RS485发送动作指完相应动作。MCU主控单元通过读取第二AD采集芯片采集的三相电流信息，获取补偿柜的补偿电流信息。MCU主控单元通过LCD和GPRS数据传输，将配电网信息、补偿电流信息、电容器运行状态等信息呈现给用户。The working principle of the utility model is: the MCU main control unit obtains the power factor, voltage, current, active power and reactive power of the distribution network through the three-phase electrical information of the distribution network collected by the first AD acquisition chip and the ADC value of voltage and current And other data, in which the ADC value is used to calculate the voltage and current harmonics to provide a basis for over-harmonic protection; to calculate the current grid environment through the power factor of the grid and the target power factor range set by the control, it is necessary to invest or remove the capacitor, in the network The group finds the capacitor that meets the corresponding action, and sends the action through RS485 to indicate the corresponding action. The MCU main control unit obtains the compensation current information of the compensation cabinet by reading the three-phase current information collected by the second AD acquisition chip. The MCU main control unit presents information such as distribution network information, compensation current information, and capacitor operating status to users through LCD and GPRS data transmission.
虽然本发明已以较佳实施例公开如上，但它们并不是用来限定本发明的，任何熟习此技艺者，在不脱离本发明之精神和范围内，自当可作各种变化或润饰，因此本发明的保护范围应当以本申请的权利要求保护范围所界定的为准。Although the present invention has been disclosed as above with preferred embodiments, they are not intended to limit the present invention. Any skilled person can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the protection scope of the claims of the present application.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524885A (en) * | 2019-01-23 | 2019-03-26 | 贵州电网有限责任公司 | A kind of intelligent low-pressure comprehensive distribution box based on Internet of Things chip wireless communication module |
| CN111063584A (en) * | 2019-12-26 | 2020-04-24 | 光一科技股份有限公司 | Electronic molded case circuit breaker |
| CN115347581A (en) * | 2022-10-17 | 2022-11-15 | 石家庄科林物联网科技有限公司 | Hierarchical stepping reactive compensation regulation and control method and system for power distribution area |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524885A (en) * | 2019-01-23 | 2019-03-26 | 贵州电网有限责任公司 | A kind of intelligent low-pressure comprehensive distribution box based on Internet of Things chip wireless communication module |
| CN111063584A (en) * | 2019-12-26 | 2020-04-24 | 光一科技股份有限公司 | Electronic molded case circuit breaker |
| CN115347581A (en) * | 2022-10-17 | 2022-11-15 | 石家庄科林物联网科技有限公司 | Hierarchical stepping reactive compensation regulation and control method and system for power distribution area |
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