CN201393070Y - Low-voltage reactive power comprehensive compensation device - Google Patents

Low-voltage reactive power comprehensive compensation device Download PDF

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CN201393070Y
CN201393070Y CN200920032747U CN200920032747U CN201393070Y CN 201393070 Y CN201393070 Y CN 201393070Y CN 200920032747 U CN200920032747 U CN 200920032747U CN 200920032747 U CN200920032747 U CN 200920032747U CN 201393070 Y CN201393070 Y CN 201393070Y
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road
compensation
refills
reactive power
combination switch
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何健
孟国军
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XI'AN QINLI COMPLETE SET ELECTRICAL APPLIANCES CO Ltd
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XI'AN QINLI COMPLETE SET ELECTRICAL APPLIANCES CO Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

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Abstract

The utility model relates to a low-voltage reactive-power comprehensive compensation device, which comprises a primary main circuit and a secondary control loop, wherein the primary main circuit comprises a co-compensation loop; for the co-compensation loop, a three-phase capacitor is connected into the delta shape and then is connected into an outgoing line end of a combination switch FK1; and an ingoing line end of the combination switch FK1 is connected with a three-phase power supply; the primary main circuit also comprises an individual compensation loop; for the individual compensation loop, a three-phase capacitor is connected into the 'Y' shape and then is connected into an outgoing line end of a combination switch FK2; and an ingoing line end of the combination switch FK2 is connected with a three-phase power supply. The device can solve the problem of over compensation or under compensation caused by co-compensation in the prior art, and the device has the advantages that the individual compensation is carried out after the co-compensation by combining the co-compensation and the individual compensation; the energy consumption is lowered; and the requirement is met.

Description

低压无功综合补偿装置 Low-voltage reactive power comprehensive compensation device

技术领域 technical field

本实用新型涉及一种低压无功综合补偿装置。The utility model relates to a low-voltage reactive power comprehensive compensation device.

背景技术 Background technique

由于用电设备本身功率因数、使用等方面因素的影响,造成电网功率因数降低,必须进行无功补偿,改善电网的供电质量。现有的无功补偿绝大多数采用共补的方式,这种补偿方式只要采集到一项需要补偿,三项都要补偿,就会出现过补的现象,电压偏高,达不到提高电网功率因数的要求,而且耗能;或者是只要采集到一项不需要补偿,三项均不补偿,就会出现欠补的现象,功率因数偏低,电压偏低,这样也达不到提高电网功率因数的要求。Due to the influence of factors such as the power factor and use of the electrical equipment itself, the power factor of the power grid is reduced, and reactive power compensation must be carried out to improve the power supply quality of the power grid. Most of the existing reactive power compensation adopts the method of co-complementation. As long as one item needs to be compensated in this compensation method, the three items must be compensated, and the phenomenon of overcompensation will occur. The voltage is too high, which cannot improve the grid Power factor requirements, and energy consumption; or as long as one of the collected items does not need to be compensated, and the three items are not compensated, there will be a phenomenon of undercompensation, the power factor is low, and the voltage is low, which cannot improve the power grid. power factor requirements.

发明内容 Contents of the invention

为克服背景技术中存在的问题,本实用新型的目的是提供一种共补与分补相结合的低压无功综合补偿装置。In order to overcome the problems in the background technology, the purpose of this utility model is to provide a low-voltage reactive power comprehensive compensation device which combines common compensation and separate compensation.

本实用新型的技术解决方案:The technical solution of the utility model:

低压无功综合补偿装置,包括一次主电路和二次控制回路,所述一次主电路包括共补回路,所述共补回路为三相电容接成“△”形接入复合开关FK1的出线端,复合开关FK1的进线端接三相电源;其特殊之处在于:所述一次主电路还包括分补回路,所述分补电路为三相电容接成“Y”形接入复合开关FK2的出线端,复合开关FK2的进线端接三相电源。其中二次控制回路包括电容补偿控制器xyJKFF、复合开关FK及三个采样电流互感器1LHa、1LHb、1LHc,所述电容补偿控制器xyJKFF的信号输出端接复合开关FK的控制节点;所述电容补偿控制器xyJKFF的信号输入端接三个采样电流互感器1LHa、1LHb、1LHc。上述一次主回路的共补回路和分补回路中分别串接有熔断器RD1、熔断器RD2,所述熔断器RD1上端口接三相电源,熔断器RD1的下端口接复合开关FK1进线端,所述熔断器RD2上端口接三相电源,熔断器RD2的下端口接复合开关FK2进线端。The low-voltage reactive power comprehensive compensation device includes a primary main circuit and a secondary control circuit. The primary main circuit includes a common compensation circuit. The common compensation circuit is a three-phase capacitor connected in a "△" shape and connected to the outlet of the compound switch FK1 , the incoming line of the composite switch FK1 is connected to a three-phase power supply; its special feature is that: the primary main circuit also includes a sub-compensation circuit, and the sub-compensation circuit is a three-phase capacitor connected in a "Y" shape to connect to the composite switch FK2 The outgoing line terminal of the composite switch FK2 is connected to the three-phase power supply. Wherein the secondary control loop comprises a capacitance compensation controller xyJKFF, a composite switch FK and three sampling current transformers 1LHa, 1LHb, 1LHc, the signal output terminal of the capacitance compensation controller xyJKFF is connected to the control node of the composite switch FK; The signal input terminal of the compensation controller xyJKFF is connected with three sampling current transformers 1LHa, 1LHb, 1LHc. The common compensation circuit and sub-compensation circuit of the above-mentioned primary main circuit are respectively connected in series with fuse RD1 and fuse RD2. The upper port of the fuse RD1 is connected to the three-phase power supply, and the lower port of the fuse RD1 is connected to the incoming terminal of the compound switch FK1. , the upper port of the fuse RD2 is connected to the three-phase power supply, and the lower port of the fuse RD2 is connected to the incoming terminal of the composite switch FK2.

上述的共补回路以及分补回路均为多个,可随意搭配,The above-mentioned co-complementary circuits and sub-complementary circuits are multiple, which can be freely matched.

例如:共补回路为6个路,分补回路为2个路;共补回路为6个路,分补回路为1个路;共补回路为3个路,分补回路为3个路。For example: there are 6 circuits for the common compensation circuit, and 2 circuits for the divided compensation circuit; 6 circuits for the common compensation circuit, and 1 circuit for the divided compensation circuit; 3 circuits for the common compensation circuit, and 3 routes for the divided compensation circuit.

本实用新型与现有技术相比又具有的优点:Compared with the prior art, the utility model has the following advantages:

1、本实用新型通过测量系统电压和负荷电流,用工业Pc机或单片机进行控制,计算出负荷的无功功率作为控制量,得到晶闸管开关闭合或断开的数据,并控制相应的晶闸管开关,采用共补与分补相结合的补偿方式,投入容量适合的电容器组,先共补之后根据需要进行分补,降低能耗,满足要求,避免了某些相欠补偿的同时,某些相过补偿,适用于民用、建筑、工矿等行业,实用范围更广。1. The utility model measures the system voltage and load current, controls it with an industrial PC or a single-chip microcomputer, calculates the reactive power of the load as the control quantity, obtains the data of the thyristor switch being closed or disconnected, and controls the corresponding thyristor switch, Adopt the compensation method combining common compensation and sub-compensation, put in a capacitor bank with appropriate capacity, first co-compensate and then sub-compensate according to needs, reduce energy consumption, meet the requirements, and avoid some phase undercompensation and some phase overcompensation Compensation, suitable for civil, construction, industrial and mining industries, with a wider range of applications.

2、本实用新型采用复合开关,补偿精度高,自动智能化跟踪检测、控制,具有节能优化管理功能,等压零电流投入,电流过零切断,无操作过电压、涌流小、能耗低;具有电压异常保护,缺相保护等功能。2. The utility model adopts a composite switch with high compensation precision, automatic intelligent tracking detection and control, energy-saving optimization management function, equal-voltage zero-current input, current zero-crossing cut-off, no operating overvoltage, small inrush current, and low energy consumption; With abnormal voltage protection, phase loss protection and other functions.

3、本发明电容器投入时,无冲击电流,使补偿效果快速、准确、安全。本发明装置成本低、可靠性高、相对需要维护工作量小。3. When the capacitor of the present invention is put into use, there is no impact current, so that the compensation effect is fast, accurate and safe. The device of the present invention has low cost, high reliability and relatively small maintenance workload.

附图说明 Description of drawings

图1为本实用新型一次主电路原理图;Fig. 1 is a schematic diagram of the primary main circuit of the utility model;

图2为本实用新型的系统图。Fig. 2 is a system diagram of the utility model.

具体实施方式 Detailed ways

如图1所示,为本实用新型的电路图,低压无功综合补偿装置,包括一次主电路和二次控制回路,所述一次主电路包括共补回路,所述共补回路为三相电容接成“△”形接入复合开关FK1的出线端,复合开关FK1的进线端接三相电源;所述一次主电路还包括分补回路,所述分补电路为三相电容接成“Y”形接入复合开关FK2的出线端,复合开关FK2的进线端接三相电源。所述一次主回路的共补回路和分补回路中分别串接有熔断器RD1、熔断器RD2,所述熔断器RD1上端口接三相电源,熔断器RD1的下端口接复合开关FK1进线端,所述熔断器RD2上端口接三相电源,熔断器RD2的下端口接复合开关FK2进线端。所述二次控制回路包括电容补偿控制器xyJKFF、复合开关FK及三个采样电流互感器1LHa、1LHb、1LHc,所述电容补偿控制器的信号输出端接复合开关FK的控制节点;所述电容补偿控制器xyJKFF的信号输入端接三个采样电流互感器1LHa、1LHb、1LHc。As shown in Figure 1, it is a circuit diagram of the present utility model, the low-voltage reactive power comprehensive compensation device includes a primary main circuit and a secondary control circuit, the primary main circuit includes a common compensation circuit, and the common compensation circuit is a three-phase capacitor connection It is connected to the outlet end of the compound switch FK1 in a "△" shape, and the incoming line terminal of the compound switch FK1 is connected to the three-phase power supply; the primary main circuit also includes a sub-compensation circuit, and the sub-compensation circuit is a three-phase capacitor connected to "Y" ”shape connected to the outgoing terminal of the composite switch FK2, and the incoming terminal of the composite switch FK2 is connected to the three-phase power supply. The common compensation circuit and sub-compensation circuit of the primary main circuit are connected in series with fuse RD1 and fuse RD2 respectively, the upper port of the fuse RD1 is connected to the three-phase power supply, and the lower port of the fuse RD1 is connected to the incoming line of the compound switch FK1 terminal, the upper port of the fuse RD2 is connected to the three-phase power supply, and the lower port of the fuse RD2 is connected to the incoming terminal of the composite switch FK2. The secondary control loop comprises a capacitance compensation controller xyJKFF, a composite switch FK and three sampling current transformers 1LHa, 1LHb, 1LHc, and the signal output terminal of the capacitance compensation controller is connected to the control node of the composite switch FK; The signal input terminal of the compensation controller xyJKFF is connected with three sampling current transformers 1LHa, 1LHb, 1LHc.

所述的共补回路以及分补回路均为多个,可随意组合搭配;The co-complementary circuit and the sub-complementary circuit are multiple, which can be combined and matched at will;

例如共补回路为6个路,分补回路为2个路;共补回路为6个路,所述分补回路为1个路;共补回路为3个路,分补回路为3个路等。For example, there are 6 circuits in the total compensation circuit, and 2 circuits in the sub-compensation circuit; there are 6 circuits in the total compensation circuit, and 1 circuit in the sub-compensation circuit; 3 circuits in the total compensation circuit, and 3 circuits in the distribution circuit wait.

本实用新型的工作过程:Working process of the present utility model:

电容补偿控制器采样互感器上三相电流和主线路上的三相电压信号。电容补偿控制器根据每相无功的变化,以无功功率为控制物理量,将信号传递给复合开关,复合开关根据接收到的信号作出相应的动作,补或者不补,如果补,则复合开关闭合,以用户设定的功率因数为投切参数限量,根据配电装置三相中每一相无功功率的大小,智能选择电容器组合自动及时地补偿无功功率容量,依据“取样补齐”的原则,投入电网,实现电容器的智能投切;如果复合开关收到电容补偿控制器不补的信号,则复合开关执行信息指示,直接切断。The capacitance compensation controller samples the three-phase current on the transformer and the three-phase voltage signal on the main line. According to the change of reactive power of each phase, the capacitor compensation controller takes reactive power as the control physical quantity, and transmits the signal to the compound switch. The compound switch makes corresponding actions according to the received signal, supplementing or not. Closed, with the power factor set by the user as the limit of switching parameters, according to the size of the reactive power of each phase in the three phases of the power distribution device, intelligently select the capacitor combination to automatically and timely compensate the reactive power capacity, according to "sampling to complete" According to the principle, it is put into the power grid to realize the intelligent switching of capacitors; if the composite switch receives the signal that the capacitor compensation controller does not compensate, the composite switch will execute the information instruction and cut off directly.

本实用新型采用三相共补与单相分补相结合的补偿方式,以智能无功控制为策略,采集三相电压、电流信号,跟踪装置中的无功的变化,以无功功率为控制物理量,以用户设定的功率因数为投切参数限量,根据配电装置三相中每一相无功功率的大小,智能选择电容器组合自动及时地补偿无功功率容量,依据“取样补齐”的原则,投入电网,实现电容器的智能投切。The utility model adopts the compensation method combining three-phase co-compensation and single-phase separate compensation, uses intelligent reactive power control as the strategy, collects three-phase voltage and current signals, tracks the change of reactive power in the device, and uses reactive power as the control Physical quantity, with the power factor set by the user as the limit of switching parameters, according to the size of the reactive power of each phase in the three phases of the power distribution device, intelligently select the capacitor combination to automatically and timely compensate the reactive power capacity, according to "sampling to complete" According to the principle, it is put into the power grid to realize the intelligent switching of capacitors.

Claims (7)

1, low-voltage reactive power comprehensive compensating device, comprise main circuit and secondary control loop, a described main circuit comprises and refills the road altogether that the described road that refills altogether is that three phase capacitance is connected into the leading-out terminal that " △ " shape is inserted combination switch FK1, the inlet wire termination three phase mains of combination switch FK1; It is characterized in that: a described main circuit comprises that also branch refills the road, and it is that three phase capacitance is connected into the leading-out terminal that " Y " shape is inserted combination switch FK2, the inlet wire termination three phase mains of combination switch FK2 that described branch is mended circuit.
2, low-voltage reactive power comprehensive compensating device according to claim 1, it is characterized in that: described secondary control loop comprises capacitance compensation controller xyJKFF, combination switch FK and three sample rate current instrument transformer 1LHa, 1LHb, 1LHc, and the signal output part of described capacitance compensation controller xyJKFF connects the Control Node of combination switch FK; The signal input part of described capacitance compensation controller xyJKFF meets three sample rate current instrument transformer 1LHa, 1LHb, 1LHc.
Figure Y2009200327470002C1
, low-voltage reactive power comprehensive compensating device according to claim 1, it is characterized in that: described road and the branch of refilling altogether refills the road and is a plurality of.
Figure Y2009200327470002C2
, low-voltage reactive power comprehensive compensating device according to claim 2, it is characterized in that: the described road that refills altogether is 6 roads, and it is 2 roads that described branch refills the road.
Figure Y2009200327470002C3
Low-voltage reactive power comprehensive compensating device according to claim 2 is characterized in that: the described road that refills altogether is 6 roads, and it is 1 road that described branch refills the road.
Figure Y2009200327470002C4
, low-voltage reactive power comprehensive compensating device according to claim 2, it is characterized in that: the described road that refills altogether is 3 roads, and it is 3 roads that described branch refills the road.
Figure Y2009200327470002C5
, according to claim 1 or 2 or 3 or 4 or 5 described low-voltage reactive power comprehensive compensating devices, it is characterized in that: refill altogether road and the branch of a described major loop refill and are serially connected with fuse RD1, fuse RD2 in the road respectively, described fuse RD1 upper port connects three phase mains, the lower port of fuse RD1 connects combination switch FK1 end of incoming cables, described fuse RD2 upper port connects three phase mains, and the lower port of fuse RD2 connects combination switch FK2 end of incoming cables.
CN200920032747U 2009-04-23 2009-04-23 Low-voltage reactive power comprehensive compensation device Expired - Lifetime CN201393070Y (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102946108A (en) * 2012-11-21 2013-02-27 保定供电公司 Voltage automatic compensation device
CN103138272A (en) * 2011-12-02 2013-06-05 上海连成(集团)有限公司 Total-sub compensation mixed compensation cabinet
CN105305457A (en) * 2015-09-15 2016-02-03 安徽佑赛科技有限公司 Low voltage reactive compensation device and low voltage reactive compensation system
CN109713682A (en) * 2019-01-23 2019-05-03 安徽南瑞继远电网技术有限公司 A kind of mixed compensation method and device based on 124888 codings

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103138272A (en) * 2011-12-02 2013-06-05 上海连成(集团)有限公司 Total-sub compensation mixed compensation cabinet
CN102946108A (en) * 2012-11-21 2013-02-27 保定供电公司 Voltage automatic compensation device
CN105305457A (en) * 2015-09-15 2016-02-03 安徽佑赛科技有限公司 Low voltage reactive compensation device and low voltage reactive compensation system
CN109713682A (en) * 2019-01-23 2019-05-03 安徽南瑞继远电网技术有限公司 A kind of mixed compensation method and device based on 124888 codings

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