CN203690744U - Intelligent low-voltage integration distribution box - Google Patents
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Abstract
Description
技术领域 technical field
本实用新型涉及配电箱,具体的说是一种智能型低压综合配电箱。 The utility model relates to a distribution box, in particular to an intelligent low-voltage comprehensive distribution box.
背景技术 Background technique
随着农村经济的快速发展,传统的低压综合配电箱在技术功能上已经不能满足一些用户的需求,具体有:1.保护不完善、不可靠;传统配电箱的低压负荷故障往往导致越级跳闸引起整条10kV线路大面积停电,甚至导致配变烧毁。2.农村电网地域广,配电箱的使用管理难度大、自动化程度低,遇到故障时检修时间长;3.经济运行效果差;无功补偿配置不合理;通常使用自身损耗大的交流接触器投切低压电容器,分级不够精细或者只有三相共补偿甚至固定补偿。4. 无远程“四遥”功能;5.非法偷盗变压器及电能情况严重,白白浪费国家的能源。 With the rapid development of the rural economy, the traditional low-voltage integrated distribution box can no longer meet the needs of some users in terms of technical functions, specifically: 1. The protection is not perfect and unreliable; the low-voltage load failure of the traditional distribution box often leads to leapfrog The trip caused a large-scale power outage on the entire 10kV line, and even caused the distribution transformer to burn out. 2. The rural power grid has a wide area, the use and management of distribution boxes is difficult, the degree of automation is low, and the maintenance time is long when a fault is encountered; 3. The economical operation effect is poor; the configuration of reactive power compensation is unreasonable; usually use AC contacts with large losses Switching low-voltage capacitors, the classification is not fine enough or there is only three-phase common compensation or even fixed compensation. 4. No remote "four remote" functions; 5. Illegal theft of transformers and electric energy is serious, wasting the country's energy in vain.
实用新型内容 Utility model content
本实用新型所要解决的技术问题是克服现有技术中的智能低压综合配电箱,作为台区电能的分配、保护、控制、计量、测量、防窃电及防盗器身、无功补偿及负荷不平衡调整之用的综合低压开关成套设备;具有结构合理、防护等级高、负荷及防窃盗保护功能安全可靠、无功补偿效果好、实用性强、节电效果明显等优点,能有效地保障农村台区的变配电系统经济、安全运行。 The technical problem to be solved by the utility model is to overcome the intelligent low-voltage integrated power distribution box in the prior art, which can be used as distribution, protection, control, metering, measurement, anti-theft and anti-theft device body, reactive power compensation and load distribution of electric energy in the station area. The comprehensive low-voltage switch complete set of equipment for unbalance adjustment; it has the advantages of reasonable structure, high protection level, safe and reliable load and anti-theft protection function, good reactive power compensation effect, strong practicability, and obvious power-saving effect, etc., which can effectively protect The power transformation and distribution system in rural areas operates economically and safely.
本实用新型为解决上述问题所采用的技术方案为:一种智能型低压综合配电箱,包括三相四线制的低压母线、低压配电管理终端、断路器、互感器和电容器,低压母线的线路上设有总断路器和剩余电流互感器,以及分别用于对线路的三相电流和三相电压进行实时取样的电流测量信号采集器和三相低压信号采集器,三相四线计量表对电流测量信号采集器和三相低压信号采集器输出电能量计量,剩余电流互感器Ⅰ的输出端、电流测量信号采集器的输出端和三相低压信号采集器的输出端与低压配电管理终端连接,所述的电容器包括多组呈三角形接线的低压三相电容器组和多组呈星形接线的单相电容器组,每组低压三相电容器组和多组呈星形接线的单相电容器组均通过相应的微型断路器和复合投切开关连接至低压母线的三个相线;零序电流互感器和其相应的配电出线开关连接至低压母线的四线上控制配电柜出线电流; The technical scheme adopted by the utility model to solve the above problems is: an intelligent low-voltage integrated distribution box, including a three-phase four-wire low-voltage busbar, a low-voltage power distribution management terminal, a circuit breaker, a transformer and a capacitor, and a low-voltage busbar The line is equipped with a main circuit breaker and a residual current transformer, as well as a current measurement signal collector and a three-phase low-voltage signal collector for real-time sampling of the three-phase current and three-phase voltage of the line respectively, three-phase four-wire metering The meter measures the output electric energy of the current measurement signal collector and the three-phase low-voltage signal collector, the output terminal of the residual current transformer I, the output terminal of the current measurement signal collector and the output terminal of the three-phase low-voltage signal collector Manage terminal connections, said capacitors include multiple sets of low-voltage three-phase capacitor banks connected in delta and multiple sets of single-phase capacitor banks connected in star shape, each set of low-voltage three-phase capacitor banks and multiple sets of single-phase capacitor banks connected in star shape The capacitor banks are all connected to the three phase lines of the low-voltage bus through corresponding miniature circuit breakers and composite switching switches; the zero-sequence current transformers and their corresponding power distribution outlet switches are connected to the four-wire control distribution cabinet outlets of the low-voltage bus current;
所述的低压配电管理终端还连接有用于发送电路状态信号和接收控制信号的双模无线通讯模块,低压配电管理终端的控制信号输出端与复合投切开关和配电出线开关连接。 The low-voltage power distribution management terminal is also connected with a dual-mode wireless communication module for sending circuit status signals and receiving control signals, and the control signal output terminal of the low-voltage power distribution management terminal is connected to the composite switching switch and the distribution outlet switch.
所述的低压配电管理终端通过RS485总线控制复合投切开关和配电出线开关的通断。 The low-voltage power distribution management terminal controls the on-off of the composite switching switch and the distribution outlet switch through the RS485 bus.
所述的低压配电管理终端上还设有备用通讯接口。 The low-voltage power distribution management terminal is also provided with a spare communication interface.
所述低压母线的线路上还设有避雷器。 A lightning arrester is also provided on the line of the low-voltage bus.
所述的低压配电管理终端的输入端上还连接有门控开关、水银倾斜开关,其输出端上连接有报警器。 The input end of the low-voltage power distribution management terminal is also connected with a door control switch and a mercury tilt switch, and an alarm is connected with an output end thereof.
有益效果:(1)、该装置在使用时,系统优先投入共补偿的低压三相电容器,然后投入分补偿的单相电容器,如果系统需求无功值仍欠缺且欠缺值小于单只低压三相电容器值时,继续投入单相电容器,如果投入的单相电容器容值之和是单只低压三相电容器容值整数倍时,则切除相对应投入的单相电容器,再投入一个三相电容器,若同等规格的电容器组中的其中几个达到预定的使用时间后,则可通过投切开关循环投切替换。 Beneficial effects: (1) When the device is in use, the system first invests in low-voltage three-phase capacitors for co-compensation, and then invests in single-phase capacitors for sub-compensation. If the capacitance value of the single-phase capacitor is lower than the value of the capacitor, continue to invest in single-phase capacitors. If the sum of the capacitance values of the single-phase capacitors is an integer multiple of the capacitance of a single low-voltage three-phase capacitor, cut off the corresponding input single-phase capacitor, and then invest in a three-phase capacitor. If several of the capacitor banks of the same specification reach the predetermined service time, they can be switched and replaced by switching switches.
(2)采用三相共补偿与多组小容量单相分补偿的编码及循环混合投切模式,根据无功负荷及功率因数自动投切电容器组,可实现在负荷峰谷期快速跟踪无功补偿需求,达到无功的粗调与微调基本无级差补偿的目的,还可使无功功率得到无间隙连续补偿,节能效果较好,保证补偿效果的同时还可延长其使用寿命。 (2) It adopts the encoding and cycle mixed switching mode of three-phase common compensation and multi-group small-capacity single-phase separate compensation, and automatically switches capacitor banks according to reactive load and power factor, which can realize fast tracking of reactive power during peak and valley load periods Compensation requirements, to achieve the purpose of basically stepless compensation of reactive power coarse adjustment and fine adjustment, and also to make reactive power be continuously compensated without gaps, the energy saving effect is better, and the service life can be extended while ensuring the compensation effect.
(2)、该装置运行安全可靠,该装置的核心元件复合投切开关和同步投切开关都具备过零投切功能,稳定性较高;另外,单相电容器组的自身运行电流低至1.44A,故障率较小。 (2) The operation of the device is safe and reliable. The core components of the device, the composite switching switch and the synchronous switching switch, have the function of zero-crossing switching, and the stability is high; in addition, the operating current of the single-phase capacitor bank is as low as 1.44 A, the failure rate is small.
(3)低压配电管理终端监测三相电压、三相电流、三相有功功率、三相无功功率、功率因数、进线及配电出线的剩余电流值、重合闸、电容器补偿信息、谐波信息、变压器防盗、变压器计量防窃电信息等;保护有进线及配电出线的剩余电流保护、过欠压保护、过流保护、速断保护、变压器防盗保护、防窃电保护、谐波超标保护、三相负荷不平衡保护;远程停送电,修改电压、电流、漏电保护、预付费、三相有功不平衡、动作时间等参数值,还可实施错峰用电等管理针对谐波电压及电流超标情况、电压合格率情况进行监测,根据不通负荷性质的设置进行分析、调控、计算及保护。 (3) The low-voltage power distribution management terminal monitors three-phase voltage, three-phase current, three-phase active power, three-phase reactive power, power factor, residual current value of incoming line and distribution outgoing line, reclosing, capacitor compensation information, harmonic Wave information, transformer anti-theft, transformer metering anti-theft information, etc.; protection has residual current protection for incoming and distribution outgoing lines, over-undervoltage protection, over-current protection, quick-break protection, transformer anti-theft protection, anti-theft protection, harmonic Over-standard protection, three-phase load unbalance protection; remote power stop, modify voltage, current, leakage protection, prepayment, three-phase active power unbalance, action time and other parameter values, and can also implement management such as staggered peak power consumption for harmonics The voltage and current exceeding the standard and the voltage qualification rate are monitored, and the analysis, regulation, calculation and protection are carried out according to the setting of the nature of the unreasonable load.
附图说明 Description of drawings
图1为本实用新型的电气控制方框图; Fig. 1 is the electrical control block diagram of the present utility model;
图2为本实用新型的接线原理图; Fig. 2 is the wiring diagram of the utility model;
附图标记:1、低压母线,2、总断路器,3、剩余电流互感器,4、低压三相电容器组,5、配电出线开关,6、单相电容器组,7、电流测量信号采集器,8、三相低压信号采集器,9、微型断路器,10、低压配电管理终端,11、备用通讯接口,12、双模无线通讯模块,13、RS485总线,14、零序电流互感器,15、避雷器,16、三相四线计量表,17、门控开关,18、水银倾斜开关,19、报警器。
Reference signs: 1. Low-voltage busbar, 2. Main circuit breaker, 3. Residual current transformer, 4. Low-voltage three-phase capacitor bank, 5. Power distribution outlet switch, 6. Single-phase capacitor bank, 7. Current
具体实施方式 Detailed ways
如图1和图2所示,一种智能型低压综合配电箱,包括三相四线制的低压母线1、低压配电管理终端10、断路器、互感器和电容器,低压母线1的线路上设有总断路器2和剩余电流互感器13,以及分别用于对线路的三相电流和三相电压进行实时取样的电流测量信号采集器7和三相低压信号采集器8,三相四线计量表16对电流测量信号采集器7和三相低压信号采集器8输出电能量计量,剩余电流互感器Ⅰ13的输出端、电流测量信号采集器7的输出端和三相低压信号采集器8的输出端与低压配电管理终端10连接,所述的电容器包括多组呈三角形接线的低压三相电容器组4和多组呈星形接线的单相电容器组6,每组低压三相电容器组4和多组呈星形接线的单相电容器组6均通过相应的微型断路器9和复合投切开关3连接至低压母线1的三个相线;零序电流互感器14和其相应的配电出线开关5连接至低压母线1的四线上控制配电柜出线电流;
As shown in Figures 1 and 2, an intelligent low-voltage integrated distribution box includes a three-phase four-wire low-voltage bus 1, a low-voltage power
所述的低压配电管理终端10还连接有用于发送电路状态信号和接收控制信号的双模无线通讯模块12,低压配电管理终端10的控制信号输出端与复合投切开关3和配电出线开关5连接。
The low-voltage power
所述的低压配电管理终端10通过RS485总线13控制复合投切开关3和配电出线开关5的通断。
The low-voltage power
所述的低压配电管理终端10上还设有备用通讯接口11。
The low-voltage power
所述低压母线1的线路上还设有避雷器15。 A lightning arrester 15 is also provided on the line of the low-voltage bus 1 .
所述的低压配电管理终端10的输入端上还连接有门控开关17、水银倾斜开关18,其输出端上连接有报警器19。
The input end of the low-voltage power
低压母线采用低压负荷控制单元(0.4kV永磁真空断路器),可实现总负荷就地(手动、电动)和远程控制、漏电保护、过流保护、过压保护等多种保护功能; The low-voltage bus adopts a low-voltage load control unit (0.4kV permanent magnet vacuum circuit breaker), which can realize various protection functions such as local (manual, electric) and remote control of the total load, leakage protection, over-current protection, and over-voltage protection;
低压配变管理终端及双模无线通讯模块可对配电变压器运行信息进行采集,实现配变监测与保护、用电负荷管理、电能质量管理、台区经济运行管理等“四遥”功能;其中配变监测与保护有:监测三相电压、三相电流、三相有功功率、三相无功功率、功率因数、进线及配电出线的剩余电流值、重合闸、电容器补偿信息、谐波信息、变压器防盗、变压器计量防窃电信息等;保护有进线及配电出线的剩余电流保护、过欠压保护、过流保护、速断保护、变压器防盗保护、防窃电保护、谐波超标保护、三相负荷不平衡保护; The low-voltage distribution transformer management terminal and dual-mode wireless communication module can collect distribution transformer operation information to realize the "four remote" functions of distribution transformer monitoring and protection, power load management, power quality management, and economic operation management of the station area; among them Distribution transformer monitoring and protection include: monitoring three-phase voltage, three-phase current, three-phase active power, three-phase reactive power, power factor, residual current value of incoming line and distribution outgoing line, reclosing, capacitor compensation information, harmonics Information, transformer anti-theft, transformer metering anti-theft information, etc.; protection includes residual current protection for incoming and distribution outgoing lines, over-undervoltage protection, over-current protection, quick-break protection, transformer anti-theft protection, anti-theft protection, and harmonic excess Protection, three-phase load imbalance protection;
用电负荷管理:远程停送电,修改电压、电流、漏电保护、预付费、三相有功不平衡、动作时间等参数值,还可实施错峰用电等管理。 Electricity load management: Remotely stop and send electricity, modify parameter values such as voltage, current, leakage protection, prepayment, three-phase active power imbalance, and action time, and implement peak-shift electricity consumption management.
电能质量管理:针对谐波电压及电流超标情况、电压合格率情况进行监测,根据不通负荷性质的设置进行分析、调控、计算及保护。 Power quality management: monitor the harmonic voltage and current exceeding the standard and the voltage pass rate, and analyze, regulate, calculate and protect according to the setting of the nature of the unreasonable load.
台区经济运行管理:根据线路功率因数、无功功率、电压情况综合判断对配电箱内装设的三相共补+单相分补电容器进行投切补偿、使台区变压器运行在一个良好的经济状态。 Economic operation management of the station area: According to the comprehensive judgment of the line power factor, reactive power and voltage, the three-phase common compensation + single-phase separate compensation capacitor installed in the distribution box is switched and compensated, so that the transformer in the station area operates in a good condition. economic status.
物理上低压母线直接进入计量室,计量室与其他线路实通过隔板隔离以防窃电,电气上实现非法开门即可就地、远程报警。 Physically, the low-voltage busbar directly enters the metering room, and the metering room is separated from other lines by partitions to prevent electricity theft. Electrically, the local and remote alarm can be realized by illegally opening the door.
防偷盗器身措施是变压器只要非授权的移动倾斜(10度以上)就会触动就地、远程报警。 The anti-theft device body measure is that as long as the transformer is tilted (more than 10 degrees) without authorization, it will trigger local and remote alarms.
三相四线多功能计量表对配变输出电能量进行计量,配合远程抄表仪可实现远程预付费售电管理; The three-phase four-wire multi-function meter measures the output power of the distribution transformer, and cooperates with the remote meter reading instrument to realize remote prepaid electricity sales management;
计量互感器即三相低压信号采集器选配精度不低于0.5S级的计量电流互感器即电流测量信号采集器进行计量取样; The metering transformer, that is, the three-phase low-voltage signal collector, is equipped with a metering current transformer with a precision not lower than 0.5S, that is, the current measurement signal collector for metering and sampling;
配电出线单元包含塑料外壳式断路器(配电出线开关)、剩余电流互感器,配电单元出线可安装两至多路,每个出线回路具备过流、速断保护、漏电保护功能,局部发生故障时减少停电面积; The power distribution outlet unit includes a plastic case circuit breaker (distribution outlet switch) and residual current transformer. Two or more outlets can be installed in the power distribution unit. Each outlet circuit has the functions of over-current, quick-break protection, and leakage protection. reduce the blackout area;
1、无功补偿 1. Reactive power compensation
以无功功率、电压、功率因数、响应时间等条件综合判定来自动投切(共补偿+分补偿)电容器组,无投切振荡,无补偿呆区;补偿精细分至4级以上,在负荷峰谷期均可快速跟踪无功补偿需求,补偿节能降损效果明显提升; Automatic switching (total compensation + sub-compensation) capacitor bank based on comprehensive judgment of reactive power, voltage, power factor, response time and other conditions, no switching oscillation, no compensation dead zone; finely divided compensation to more than 4 levels, under load The demand for reactive power compensation can be quickly tracked during peak and valley periods, and the effect of compensation for energy saving and loss reduction has been significantly improved;
2、三相负荷不平衡调整 2. Three-phase load unbalance adjustment
使用相见跨接电容器的方式最大限度地调整三相有功的不平衡,有效增加变压器的出力,延长配电变压器的寿命; Use the method of cross-connecting capacitors to adjust the imbalance of three-phase active power to the greatest extent, effectively increase the output of the transformer, and prolong the life of the distribution transformer;
3、完善的保护功能 3. Perfect protection function
无功补偿单元具备过流、过压、谐波报警与保护功能,电容器组在额定电压切除后,能满足3分钟之内应将留存残压控制在50V以下,确保装置运行安全可靠; The reactive power compensation unit has over-current, over-voltage, harmonic alarm and protection functions. After the rated voltage of the capacitor bank is cut off, the residual voltage should be controlled below 50V within 3 minutes to ensure safe and reliable operation of the device;
4、过零投切的复合开关 4. Composite switch for zero-crossing switching
电容器复合投切开关集成过零投切功能,自身实现了电压过零投入,电流过零关断,既具有可控硅投切无冲击、跟踪速度快的优点,又彻底避免了可控硅因散热问题烧毁,节能环保。 The capacitor compound switching switch integrates the zero-crossing switching function, which realizes the voltage zero-crossing input and the current zero-crossing shutdown. Heat dissipation problem burns out, energy saving and environmental protection.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105406373A (en) * | 2015-12-18 | 2016-03-16 | 浙江麦浪电气有限公司 | Intelligent terminal distribution box |
CN105429009A (en) * | 2015-12-14 | 2016-03-23 | 上海基胜能源科技有限公司 | Precision power distribution cabinet |
CN105954581A (en) * | 2016-06-28 | 2016-09-21 | 国网江苏省电力公司检修分公司 | Load control electric energy meter having direct load control function, and control method thereof |
CN112490897A (en) * | 2020-12-08 | 2021-03-12 | 广东正诚电气科技有限公司 | Intelligent low-voltage distribution transformer comprehensive distribution box |
CN114204593A (en) * | 2021-11-18 | 2022-03-18 | 王振洁 | Three-phase four-wire system annular power supply system |
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2014
- 2014-02-19 CN CN201420071216.2U patent/CN203690744U/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105429009A (en) * | 2015-12-14 | 2016-03-23 | 上海基胜能源科技有限公司 | Precision power distribution cabinet |
CN105406373A (en) * | 2015-12-18 | 2016-03-16 | 浙江麦浪电气有限公司 | Intelligent terminal distribution box |
CN105954581A (en) * | 2016-06-28 | 2016-09-21 | 国网江苏省电力公司检修分公司 | Load control electric energy meter having direct load control function, and control method thereof |
CN112490897A (en) * | 2020-12-08 | 2021-03-12 | 广东正诚电气科技有限公司 | Intelligent low-voltage distribution transformer comprehensive distribution box |
CN114204593A (en) * | 2021-11-18 | 2022-03-18 | 王振洁 | Three-phase four-wire system annular power supply system |
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