CN201260079Y - Synthetic apparatus for power distribution monitoring and intelligent passive optimization - Google Patents

Synthetic apparatus for power distribution monitoring and intelligent passive optimization Download PDF

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CN201260079Y
CN201260079Y CNU2008201848821U CN200820184882U CN201260079Y CN 201260079 Y CN201260079 Y CN 201260079Y CN U2008201848821 U CNU2008201848821 U CN U2008201848821U CN 200820184882 U CN200820184882 U CN 200820184882U CN 201260079 Y CN201260079 Y CN 201260079Y
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controller
ttu
reactive power
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张俊生
林航
黄前华
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ANHUI JIYUAN POWER SYSTEM TECHNOLOGY Co Ltd
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ANHUI JIYUAN POWER SYSTEM TECHNOLOGY Co Ltd
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Abstract

配电监测及智能无功优化综合装置,其特征是装置的构成包括一断路器QF,串接在装置与系统三相线A、B、C之间,断路器QF闭合使控制器TTU投入工作;一控制器TTU,通过检测系统三相电压和三相电流的幅值和相位差,计算得到系统无功功率,并于设定的投入门限和切除门限相比较,通过复合开关FK控制补偿电容器C的投入或退出;一补偿电容器组C,在控制器TTU的控制下,分组分相投入或退出系统。本实用新型采用就地平衡的工作方式,可以有效减少电损、提高电压合格率、提高设备运行的可靠性。

Figure 200820184882

The integrated device for power distribution monitoring and intelligent reactive power optimization is characterized in that the composition of the device includes a circuit breaker QF, which is connected in series between the device and the three-phase lines A, B, and C of the system, and the circuit breaker QF is closed to make the controller TTU work ; A controller TTU, by detecting the amplitude and phase difference of the three-phase voltage and three-phase current of the system, calculates the reactive power of the system, and compares it with the set input threshold and cut-off threshold, and controls the compensation capacitor through the compound switch FK Input or exit of C; a compensation capacitor bank C, under the control of the controller TTU, enters or exits the system in groups and phases. The utility model adopts an on-site balanced working mode, which can effectively reduce power loss, increase the qualified rate of voltage, and improve the reliability of equipment operation.

Figure 200820184882

Description

配电监测及智能无功优化综合装置 Power distribution monitoring and intelligent reactive power optimization integrated device

技术领域 technical field

本实用新型涉及应用于箱式变、户外配变、低压成套等设备中的配电监测及无功优化综合装置。The utility model relates to a power distribution monitoring and reactive power optimization comprehensive device used in equipment such as box-type transformers, outdoor distribution transformers, and low-voltage complete sets.

背景技术 Background technique

由于电网容量的不断增加,对电网无功要求也与日俱增。无功功率同有功功率一样,是保证电能质量不可分割的一部分。在电力系统中应保持无功功率的平衡,否则有可能将会引起电压降低、设备损坏、功率因数下降,严重时会使系统的电压崩溃,造成大面积停电事故。Due to the continuous increase of the grid capacity, the reactive power requirements of the grid are also increasing day by day. Like active power, reactive power is an integral part of ensuring power quality. In the power system, the balance of reactive power should be maintained, otherwise it may cause voltage drop, equipment damage, power factor drop, and in severe cases, the voltage of the system will collapse, causing large-scale power outages.

国内厂家和用户在解决电网无功优化、降低网损问题时除采用恒压变压器外最多的是采用静态无功补偿,这种补偿方式,存在以下问题:Domestic manufacturers and users mostly use static reactive power compensation in addition to constant voltage transformers when solving the problem of reactive power optimization and network loss reduction in the power grid. This compensation method has the following problems:

1、电容器投入运行后,常出现过补情况,向电网倒送无功,电网电压升高,危害电网和设备的安全运行,增加网损,电压合格率降低。1. After the capacitor is put into operation, overcompensation often occurs, reactive power is sent back to the power grid, and the voltage of the power grid rises, which endangers the safe operation of the power grid and equipment, increases network loss, and reduces the voltage qualification rate.

2、电容器投入运行后,出现欠补偿情况,不能充分补偿电网无功,功率因数低,电网电压低,危害电网和设备安全运行,增加网损,电压合格率降低。2. After the capacitor is put into operation, under-compensation occurs, the reactive power of the grid cannot be fully compensated, the power factor is low, and the grid voltage is low, which endangers the safe operation of the grid and equipment, increases network loss, and reduces the voltage qualification rate.

3、少数采用动态无功补偿的产品由于无法全面“理解”用户和电网,仅仅是“一缺就补”,“缺多少补多少”,易对电网造成冲击或频繁操作影响设备寿命。3. A small number of products using dynamic reactive power compensation cannot fully "understand" users and the power grid, and only "make up for any shortage" and "make up for as much as there is a shortage", which is likely to cause impact on the power grid or affect the life of equipment due to frequent operation.

实用新型内容 Utility model content

本实用新型是为避免上述现有技术所存在的不足之处,提供一种配电监测及智能无功优化综合装置,以实现电网无功功率的就地平衡,减少电损,提高电压合格率,提高设备运行的可靠性的发明目的。The utility model is to avoid the shortcomings of the above-mentioned prior art, and provides a comprehensive device for power distribution monitoring and intelligent reactive power optimization, so as to realize the local balance of reactive power in the power grid, reduce power loss, and improve the voltage qualification rate , The purpose of the invention to improve the reliability of equipment operation.

本实用新型解决技术问题采用如下技术方案:The utility model solves the technical problem and adopts the following technical solutions:

配电监测及智能无功优化综合装置,其结构特点是装置的构成包括:The integrated device for power distribution monitoring and intelligent reactive power optimization has a structural feature that the composition of the device includes:

一断路器QF,串接在装置与系统三相线A、B、C之间,断路器QF闭合使控制器TTU投入工作;A circuit breaker QF, connected in series between the device and the three-phase lines A, B, and C of the system, the circuit breaker QF is closed to make the controller TTU work;

一控制器TTU,通过检测系统三相电压和三相电流的幅值和相位差,计算得到系统无功功率,并于设定的投入门限和切除门限相比较,通过复合开关FK控制补偿电容器C的投入或退出;A controller TTU, by detecting the amplitude and phase difference of the three-phase voltage and three-phase current of the system, calculates the reactive power of the system, and compares it with the set input threshold and cut-off threshold, and controls the compensation capacitor C through the composite switch FK input or withdrawal;

一补偿电容器组C,在控制器TTU的控制下,通过复合开关FK分组分相投入或退出系统。A compensation capacitor bank C, under the control of the controller TTU, enters or exits the system in groups and phases through the composite switch FK.

本实用新型的结构特点也在于:Structural features of the present utility model also are:

所述控制器TTU采用DSP数字信号处理芯片,以模拟量经AD转换输入及直接以开关量输入,以开关量输出;配置RS485/232通讯串口及GPRS通讯模块,远程传输配变信息及电容器投入和切除信息。The TTU of the controller adopts DSP digital signal processing chip, and the analog quantity is input through AD conversion, and the switch quantity is directly input, and the switch quantity is output; RS485/232 communication serial port and GPRS communication module are configured to remotely transmit distribution information and capacitor input and resection information.

与已有技术相比,本实用新型的有益效果体现在:Compared with the prior art, the beneficial effects of the utility model are reflected in:

1、本实用新型设置TTU控制器,当无功功率缺额值增大到设定值时,控制器对指定的复合开关输出过零触发脉冲使之导通将电容器投入运行,直到功率缺额逼近设定值,当无功功率缺额值下降到低于设定值时,控制器停发触发脉冲信号而将电容器退出,以免电压过高。这种就地平衡的工作方式,可以有效减少电损、提高电压合格率、提高设备运行的可靠性。1. The utility model is equipped with a TTU controller. When the reactive power deficit value increases to the set value, the controller outputs a zero-crossing trigger pulse to the specified composite switch to conduct it and put the capacitor into operation until the power deficit approaches the set value. Fixed value, when the reactive power deficit value drops below the set value, the controller stops sending the trigger pulse signal and withdraws the capacitor to prevent the voltage from being too high. This in-situ balanced working method can effectively reduce power loss, increase the voltage qualification rate, and improve the reliability of equipment operation.

2、本实用新型TTU控制器采用DSP数字信号处理技术,实现了配电监测与无功优化控制的一体化。2. The TTU controller of this utility model adopts DSP digital signal processing technology to realize the integration of power distribution monitoring and reactive power optimization control.

3、本实用新型通过设置优化无功补偿策略模型,可自动循环分组分相投切电容器,防止过补,可适应电网中不同的负荷特性。3. By setting and optimizing the reactive power compensation strategy model, the utility model can automatically cycle grouping, phase-separate switching capacitors, prevent overcompensation, and adapt to different load characteristics in the power grid.

4、本实用新型具有GPRS等多种通讯接口,易于组网。4. The utility model has various communication interfaces such as GPRS, and is easy to form a network.

5、本实用新型实现了补偿装置与计量箱的组合,组合装置有利于降低成本,减少占用空间,减少维护工作量。5. The utility model realizes the combination of the compensation device and the metering box. The combination device is beneficial to reduce the cost, reduce the occupied space and reduce the maintenance workload.

附图说明 Description of drawings

图1为本实用新型系统构成示意图。Fig. 1 is a schematic diagram of the structure of the utility model system.

图1中标号:QF断路器、BL避雷器、FU熔断器、FU1熔断器、FK复合开关、TTU控制器、C电容器组、LK投切指示灯。Labels in Figure 1: QF circuit breaker, BL arrester, FU fuse, FU1 fuse, FK composite switch, TTU controller, C capacitor bank, LK switching indicator light.

图2为本实用新型控制器构成示意图:Fig. 2 is a schematic diagram of the composition of the utility model controller:

具体实施方式 Detailed ways

参见图1,本实施例中的设置包括:Referring to Figure 1, the settings in this embodiment include:

一断路器QF,串接在装置与系统三相线A、B、C之间,断路器QF闭合使控制器TTU投入工作;A circuit breaker QF, connected in series between the device and the three-phase lines A, B, and C of the system, the circuit breaker QF is closed to make the controller TTU work;

一控制器TTU,通过检测系统三相电压和三相电流的幅值和相位差,计算得到系统无功功率,并于设定的投入门限和切除门限相比较,通过复合开关FK控制补偿电容器C的投入或退出;A controller TTU, by detecting the amplitude and phase difference of the three-phase voltage and three-phase current of the system, calculates the reactive power of the system, and compares it with the set input threshold and cut-off threshold, and controls the compensation capacitor C through the composite switch FK input or withdrawal;

一补偿电容器组C,在控制器TTU的控制下,通过复合开关FK分组分相投入或退出系统。A compensation capacitor bank C, under the control of the controller TTU, enters or exits the system in groups and phases through the composite switch FK.

图2所示,控制器由9个功能模块组成,即模拟量输入及A/D转换电路、开关量输入电路、开关量输出电路、工作电源电路、信号处理单元电路、通讯电路、看门狗及系统复位电路、系统日历时钟电路、分析数据储存电路。As shown in Figure 2, the controller is composed of 9 functional modules, namely analog input and A/D conversion circuit, digital input circuit, digital output circuit, working power circuit, signal processing unit circuit, communication circuit, watchdog And system reset circuit, system calendar clock circuit, analysis data storage circuit.

本实施例中,控制器TTU采用DSP数字信号处理芯片,以模拟量经AD转换输入及直接以开关量输入,以开关量输出;配置RS485/232通讯串口及GPRS通讯模块,远程传输配变信息及电容器投入和切除信息,实现远程监控。In this embodiment, the controller TTU adopts a DSP digital signal processing chip, and the analog quantity is input through AD conversion, and the switch quantity is directly input, and the switch quantity is output; RS485/232 communication serial port and GPRS communication module are configured to transmit distribution information remotely And capacitor input and removal information, to achieve remote monitoring.

以控制器TTU采集电网中的三相电压和电流,并计算出实际的各相无功功率大小和功率因数,当某相的无功功率的缺额增大到设定值时,即满足电容器投入条件时,控制器对指定的复合开关FK输出投入命令,复合开关KF即在电压过零时刻导通,使对应相的电容器C投入运行,直到功率缺额逼近设定值;同样,当无功功率缺额值下降到低于设定值时,控制器TTU对指定的复合开关撤除投入命令,复合开关FK即在电流过零时刻断开,使对应相的电容器C撤除,直到满足事先设定要求。当某一相的电容器C投入运行时,对应相的投切指示灯灯LK点亮。Use the controller TTU to collect the three-phase voltage and current in the power grid, and calculate the actual reactive power and power factor of each phase. When the reactive power deficit of a certain phase increases to the set value, it meets the requirements of the capacitor input. condition, the controller outputs an input command to the specified composite switch FK, and the composite switch KF is turned on at the moment when the voltage crosses zero, so that the capacitor C of the corresponding phase is put into operation until the power deficit approaches the set value; similarly, when the reactive power When the shortfall value drops below the set value, the controller TTU cancels the input command to the designated composite switch, and the composite switch FK is disconnected at the moment when the current crosses zero, so that the capacitor C of the corresponding phase is removed until the preset requirements are met. When the capacitor C of a certain phase is put into operation, the switching indicator lamp LK of the corresponding phase is lit.

具体实施中,设定电容器C的投入和切除的门限值,使无功功率维持在要求的范围内,可以设置电压的闭锁值,最大电流闭锁值,综合谐波闭锁值,电容器投入或切除延迟时间等。In the specific implementation, set the threshold value of input and removal of capacitor C, so that the reactive power is maintained within the required range, and the blocking value of voltage, maximum current blocking value, comprehensive harmonic blocking value, capacitor input or removal can be set delay time etc.

此外,可以采用双向反并联的晶闸管与磁保持开关组成的智能复合开关FK进行电力电容器C的投切,这种结构形式的复合开关FK具有可控硅过零投切的特点,而在正常接通期间又具有磁保持开关零功耗的优点,防止投切时电弧冲击造成烧坏设备,提高了设备运行的可靠性。In addition, the intelligent composite switch FK composed of bidirectional anti-parallel thyristor and magnetic latching switch can be used to switch the power capacitor C. It also has the advantage of zero power consumption of the magnetic latching switch during the on-off period, which prevents the equipment from being burned due to arc impact during switching, and improves the reliability of the equipment operation.

本实用新型适用于380V低压配电网络,可于户内或户外安装使用。The utility model is suitable for a 380V low-voltage power distribution network and can be installed and used indoors or outdoors.

补偿方式:三相补偿和分相补偿相结合,共补和分补相结合的混合补偿方式,其中共补容量根据配电变压器容量来配置一组,分补可以分相配置三组,也可根据用户要求进行配。投切方式:自动循环投切,即先接通的先分断,后分断的后接通,电容器组轮流工作。Compensation method: a combination of three-phase compensation and phase-separated compensation, and a hybrid compensation method that combines common compensation and sub-compensation. The co-compensation capacity is configured in one group according to the capacity of the distribution transformer. Configure according to user requirements. Switching mode: automatic cycle switching, that is, the first switch is broken first, the last switch is switched on, and the capacitor bank works in turn.

Claims (2)

1、配电监测及智能无功优化综合装置,其特征是装置的构成包括:1. The comprehensive device for power distribution monitoring and intelligent reactive power optimization is characterized in that the composition of the device includes: 一断路器QF,串接在装置与系统三相线A、B、C之间,断路器QF闭合使控制器TTU投入工作;A circuit breaker QF, connected in series between the device and the three-phase lines A, B, and C of the system, the circuit breaker QF is closed to make the controller TTU work; 一控制器TTU,通过检测系统三相电压和三相电流的幅值和相位差,计算得到系统无功功率,并于设定的投入门限和切除门限相比较,通过复合开关FK控制补偿电容器C的投入或退出;A controller TTU, by detecting the amplitude and phase difference of the three-phase voltage and three-phase current of the system, calculates the reactive power of the system, and compares it with the set input threshold and cut-off threshold, and controls the compensation capacitor C through the composite switch FK input or withdrawal; 一补偿电容器组C,在控制器TTU的控制下,通过复合开关FK分组分相投入或退出系统。A compensation capacitor bank C, under the control of the controller TTU, enters or exits the system in groups and phases through the composite switch FK. 2、根据权利要求1所述的配电监测及智能无功优化综合装置,其特征是所述控制器TTU采用DSP数字信号处理芯片,以模拟量经AD转换输入以及直接以开关量输入,以开关量输出;配置RS485/232通讯串口及GPRS通讯模块,远程传输配变信息及电容器投入和切除信息。2. The comprehensive device for power distribution monitoring and intelligent reactive power optimization according to claim 1, characterized in that the controller TTU adopts a DSP digital signal processing chip, and the analog quantity is input through AD conversion and directly with the switch quantity, so as to Switch output; equipped with RS485/232 communication serial port and GPRS communication module, remote transmission of distribution transformer information and capacitor input and removal information.
CNU2008201848821U 2008-08-29 2008-08-29 Synthetic apparatus for power distribution monitoring and intelligent passive optimization Expired - Fee Related CN201260079Y (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105552925A (en) * 2015-12-30 2016-05-04 国网浙江余姚市供电公司 Novel graded reactive power compensation device
CN105576669A (en) * 2015-12-30 2016-05-11 国网浙江余姚市供电公司 Method for preventing reactive power from being released to power network
CN112134295A (en) * 2020-09-08 2020-12-25 广东电网有限责任公司广州供电局 Special reactive compensation control method and system for low-voltage grid-connected distributed power supply

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105552925A (en) * 2015-12-30 2016-05-04 国网浙江余姚市供电公司 Novel graded reactive power compensation device
CN105576669A (en) * 2015-12-30 2016-05-11 国网浙江余姚市供电公司 Method for preventing reactive power from being released to power network
CN112134295A (en) * 2020-09-08 2020-12-25 广东电网有限责任公司广州供电局 Special reactive compensation control method and system for low-voltage grid-connected distributed power supply

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