CN202103431U - MCR (Magnetically Controlled Reactor)-type static var compensator (SVC) - Google Patents

MCR (Magnetically Controlled Reactor)-type static var compensator (SVC) Download PDF

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CN202103431U
CN202103431U CN2011202054239U CN201120205423U CN202103431U CN 202103431 U CN202103431 U CN 202103431U CN 2011202054239 U CN2011202054239 U CN 2011202054239U CN 201120205423 U CN201120205423 U CN 201120205423U CN 202103431 U CN202103431 U CN 202103431U
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mcr
current transformer
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陈军
廉德忠
赵诗东
尹逊景
陈书利
李敏
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Pingyin Power Supply Co Of State Grid Shandong Electric Power Co
State Grid Shandong Pingyin Power Supply Co
State Grid Corp of China SGCC
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PINGYANG POWER SUPPLY Co
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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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Smart grids as enabling technology in buildings sector
    • 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
    • Y02E40/10Flexible AC transmission systems [FACTS]
    • 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/14Protecting elements, switches, relays or circuit breakers

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Abstract

一种MCR型SVC静止式动态无功补偿装置,其主要由供电系统母线通过补偿出线开关向补偿母线供电,并设置有FC支路和MCR支路,所述FC支路包括电容器和固定电抗器,所述MCR支路包括磁阀式可控电抗器MCR,其特征是,还包括FC支路保护系统、MCR支路控制保护系统、控制电源系统、第一电压互感器、第二电压互感器、第一电流互感器、第二电流互感器、第三电流互感器和第四电流互感器。本实用新型提高了电网的电压稳定能力和功率因数,降低了电网损耗,实现了根据负荷变化情况进行快速、平滑调节使系统无功迅速达到平衡,提高补偿装置快速响应能力。本实用新型不仅结构简单、体积小、制造和维护成本低,而且运行稳定、易于维护。

Figure 201120205423

An MCR type SVC static dynamic reactive power compensation device, which mainly supplies power to the compensation bus from the power supply system bus through the compensation outlet switch, and is provided with an FC branch and an MCR branch. The FC branch includes capacitors and fixed reactors , the MCR branch includes a magnetic valve type controllable reactor MCR, which is characterized in that it also includes an FC branch protection system, an MCR branch control protection system, a control power supply system, a first voltage transformer, and a second voltage transformer , a first current transformer, a second current transformer, a third current transformer and a fourth current transformer. The utility model improves the voltage stability and power factor of the power grid, reduces the loss of the power grid, realizes fast and smooth adjustment according to the load change, makes the reactive power of the system quickly reach balance, and improves the fast response capability of the compensation device. The utility model is not only simple in structure, small in volume, low in manufacturing and maintenance costs, but also stable in operation and easy in maintenance.

Figure 201120205423

Description

MCR型SVC静止式动态无功补偿装置MCR type SVC static dynamic reactive power compensation device

技术领域 technical field

本实用新型涉及一种电网无功调节装置,具体地说是一种基于磁阀式可控电抗器的MCR型SVC静止式动态无功补偿装置。The utility model relates to a reactive power adjustment device for a power grid, in particular to an MCR type SVC static dynamic reactive power compensation device based on a magnetic valve type controllable reactor.

背景技术 Background technique

近年来,随着经济快速发展,许多现代工业中大功率的轧机、电弧炉、电焊机等电器设备用电容量在成倍甚至数十倍的增长。这些大型设备都是冲击性负荷,他们的使用不仅耗电量大,还会对电网造成很大的无功冲击,形成电压闪变和产生谐波污染。这些问题的产生,不但影响了设备自身的正常运行,它们还可以在电网中传播,进而干扰其他设备的正常使用甚至损坏。更为严重的是,谐波的产生会造成电力设备保护误动作、计量不准确、控制系统失灵和通讯系统干扰等后果,形成供电系统的重大安全隐患。In recent years, with the rapid economic development, the electrical capacity of high-power rolling mills, electric arc furnaces, electric welding machines and other electrical equipment in many modern industries has increased exponentially or even dozens of times. These large-scale equipment are impact loads. Their use not only consumes a lot of power, but also causes a large reactive power impact on the power grid, forming voltage flicker and generating harmonic pollution. The occurrence of these problems not only affects the normal operation of the equipment itself, but they can also spread in the power grid, thereby interfering with the normal use of other equipment or even damage it. What's more serious is that the generation of harmonics will cause consequences such as misoperation of power equipment protection, inaccurate measurement, failure of control system and interference of communication system, forming a major safety hazard of the power supply system.

随着我国电力供求量的快速增长,提高电能质量、降低输变电损耗的要求也日益迫切。利用电容器电抗器投切实现无功就地平衡是提高电能质量、降低线损的主要手段,尤其是110kV、35kV变电站作为电网系统中的末端变电站,承担着直接向用户负载提供电压稳定无功平衡的高质量电能的任务,无功补偿装置显得更为重要。目前大多数110kV、35kV变电站的无功自动补偿均不够理想,这种有级电容的补偿设备实现了跟踪负荷变化动态补偿功率,但多数由于不能适应负荷变化快,所以达不到最理想补偿效果,负荷高峰时有的变电站10kV母线功率因数低到0.96以下。With the rapid growth of my country's power supply and demand, the requirements for improving power quality and reducing power transmission and transformation losses are becoming increasingly urgent. Using capacitor reactor switching to achieve reactive power balance is the main means to improve power quality and reduce line loss, especially 110kV and 35kV substations, as the terminal substations in the power grid system, are responsible for directly providing voltage stability and reactive power balance to user loads The task of high-quality electric energy, reactive power compensation device is more important. At present, the reactive power automatic compensation of most 110kV and 35kV substations is not ideal. This kind of compensation equipment with step capacitors can track the dynamic compensation power of load changes, but most of them cannot achieve the best compensation effect because they cannot adapt to the fast load changes. , Some substation 10kV bus power factor is as low as below 0.96 during peak load.

现有两种技术方案:改造现有10kV自动无功补偿装置和晶闸管控制电抗器型(TCR)静止式动态无功补偿装置。第一种方案实现无功自动跟踪补偿就是根据负荷大小投入电容器多少,把总补偿容量的电容器分为多组根据负荷大小变化投切电容器组数,尽可能的达到无功平衡。补偿精度与电容器组数成正比,电容器分的组数越多补偿精度越高,但是设备投资成本越大,占地空间越大,设备的可靠性要求越高。要提高补偿装置的补偿精度,实现分组跟踪补偿,利用这种方案由于投资成本和占地空间限制很难推广使用。第二种方案晶闸管阀组与空心电抗器串联在一起,晶闸管阀组不导通时,没有电流流过电抗器,电抗器不消耗无功功率,晶闸管导通角度越小,流过电抗器的电流越大,电抗器吸收的无功功率越多;晶闸管导通角度越大,流过电抗器的电流越小,电抗器吸收的无功功率越小,通过控制晶闸管的导通角,以实现动态的无功功率调节。TCR虽然具有补偿量连续可调的特点,但是其缺点也是显而易见的,结构复杂,制造成本大,损耗大,运行维护也相对复杂。There are two technical solutions: transforming the existing 10kV automatic reactive power compensation device and thyristor-controlled reactor (TCR) static dynamic reactive power compensation device. The first scheme to realize reactive power automatic tracking compensation is to input capacitors according to the load size, and divide the capacitors with total compensation capacity into multiple groups according to the change of load size, so as to achieve reactive power balance as much as possible. The compensation accuracy is proportional to the number of capacitor groups. The more capacitor groups, the higher the compensation accuracy, but the greater the equipment investment cost, the larger the occupied space, and the higher the reliability requirements of the equipment. To improve the compensation accuracy of the compensation device and realize group tracking compensation, it is difficult to popularize and use this scheme due to the limitation of investment cost and occupied space. In the second scheme, the thyristor valve group is connected in series with the air-core reactor. When the thyristor valve group is not conducting, no current flows through the reactor, and the reactor does not consume reactive power. The larger the current, the more reactive power absorbed by the reactor; the larger the conduction angle of the thyristor, the smaller the current flowing through the reactor, and the smaller the reactive power absorbed by the reactor. By controlling the conduction angle of the thyristor, to achieve Dynamic reactive power regulation. Although TCR has the feature of continuously adjustable compensation, its disadvantages are also obvious, such as complex structure, high manufacturing cost, large loss, and relatively complicated operation and maintenance.

实用新型内容 Utility model content

针对上述不足,本实用新型提供了一种MCR型SVC静止式动态无功补偿装置,其不仅各项性能稳定,而且制造和维护成本低。In view of the above shortcomings, the utility model provides an MCR type SVC static dynamic reactive power compensation device, which not only has stable performance, but also has low manufacturing and maintenance costs.

本实用新型解决其技术问题采取的技术方案是:MCR型SVC静止式动态无功补偿装置,其主要由供电系统母线通过补偿出线开关向补偿母线供电,并设置有FC支路和MCR支路,所述FC支路包括电容器和固定电抗器,所述MCR支路包括磁阀式可控电抗器MCR,其特征是,还包括FC支路保护系统、MCR支路控制保护系统、控制电源系统、第一电压互感器、第二电压互感器、第一电流互感器、第二电流互感器、第三电流互感器和第四电流互感器;The technical solution adopted by the utility model to solve the technical problem is: MCR type SVC static dynamic reactive power compensation device, which is mainly powered by the busbar of the power supply system through the compensation outlet switch to the compensation busbar, and is provided with FC branch and MCR branch. The FC branch includes a capacitor and a fixed reactor, and the MCR branch includes a magnetic valve type controllable reactor MCR, which is characterized in that it also includes a FC branch protection system, an MCR branch control and protection system, a control power supply system, a first voltage transformer, a second voltage transformer, a first current transformer, a second current transformer, a third current transformer, and a fourth current transformer;

所述的FC支路和MCR支路通过各自的隔离开关与补偿母线连接;所述第一电流互感器设置在供电系统母线与补偿母线之间;所述第二电流互感器设置在FC支路与补偿母线之间;所述第三电流互感器设置在MCR支路与补偿母线之间;所述第四电流互感器设置在负载与供电系统母线之间;所述第一电压互感器与供电系统母线连接,所述第二电压互感器与补偿母线连接;The FC branch and the MCR branch are connected to the compensation bus through respective isolation switches; the first current transformer is arranged between the power supply system bus and the compensation bus; the second current transformer is arranged in the FC branch and the compensation bus; the third current transformer is set between the MCR branch and the compensation bus; the fourth current transformer is set between the load and the power supply system bus; the first voltage transformer and the power supply The system bus is connected, and the second voltage transformer is connected to the compensation bus;

所述FC支路保护系统包括数据采集单元、处理器CPU和保护输出单元,所述FC支路保护系统的数据采集单元分别与第一电流互感器、第二电流互感器和FC支路相连;The FC branch protection system includes a data acquisition unit, a processor CPU and a protection output unit, and the data acquisition unit of the FC branch protection system is connected to the first current transformer, the second current transformer and the FC branch respectively;

所述MCR支路控制保护系统包括控制保护模块、监控模块和励磁模块,所述控制保护模块包括处理器CPU和分别与处理器CPU相连接的通讯单元、数据输入单元DI、数据输出单元DO、数据采样单元及光电接口电路;所述监控模块包括上位监控机和分别与上位监控机连接的显示单元和打印机,所述上位监控机与监控保护模块的通讯单元相连接;所述励磁模块包括依次串联的光电接口电路、脉冲电路、驱动放大电路和可控硅;所述的励磁模块和监控保护模块通过光电接口电路相连接;所述MCR支路控制保护系统的控制保护模块的数据采样单元分别与第三电流互感器、第四电流互感器和第一电压互感相连接;所述MCR支路控制保护系统的励磁模块的脉冲电路分别与第二电压互感器和第三电流互感器相连接。The MCR branch control and protection system includes a control and protection module, a monitoring module and an excitation module, and the control and protection module includes a processor CPU and a communication unit connected to the processor CPU, a data input unit DI, a data output unit DO, A data sampling unit and a photoelectric interface circuit; the monitoring module includes an upper monitoring machine and a display unit and a printer connected to the upper monitoring machine respectively, and the upper monitoring machine is connected with the communication unit of the monitoring and protection module; the excitation module includes sequentially A photoelectric interface circuit, a pulse circuit, a drive amplifier circuit and a thyristor connected in series; the excitation module and the monitoring and protection module are connected through the photoelectric interface circuit; the data sampling units of the control protection module of the MCR branch control protection system are respectively It is connected with the third current transformer, the fourth current transformer and the first voltage transformer; the pulse circuit of the excitation module of the MCR branch control protection system is respectively connected with the second voltage transformer and the third current transformer.

其工作原理是:FC支路向供电系统提供固定容性无功,MCR支路则按供电系统负荷变化吸收多余容性无功,使系统感性和容性无功趋于平衡。FC支路与MCR支路可共用一套出线柜,各支路设置的隔离开关检修或停用时与系统隔离。第一电压互感器为系统母线电压互感器,用来检测系统母线电压值;第二电压互感器为补偿母线电压互感器,用来检测补偿母线电压信号,供MCR支路作触发脉冲同步信号使用。各支路均配备过流保护检测用的电流互感器。当FC支路出现保护故障时,FC支路保护系统首先通过保护输出向补偿出线开关发送分闸指令,然后再通过通讯接口向监控部分上传保护、报警信息;当MCR支路控制保护系统检测到MCR支路或负载回路电流超过其一段或二段过流定值时,通过DO接口向各支路的出线开关发出分闸指令,并将保护报警信号上传至监控部分发出报警信息。Its working principle is: the FC branch provides fixed capacitive reactive power to the power supply system, and the MCR branch absorbs excess capacitive reactive power according to the load change of the power supply system, so that the system's inductive and capacitive reactive power tend to balance. The FC branch and the MCR branch can share a set of outlet cabinets, and the isolating switch installed in each branch is isolated from the system when it is overhauled or disabled. The first voltage transformer is a system bus voltage transformer, which is used to detect the system bus voltage value; the second voltage transformer is a compensation bus voltage transformer, which is used to detect the compensation bus voltage signal, which is used as a trigger pulse synchronization signal for the MCR branch . Each branch is equipped with a current transformer for overcurrent protection detection. When a protection fault occurs in the FC branch, the FC branch protection system first sends an opening command to the compensation outlet switch through the protection output, and then uploads protection and alarm information to the monitoring part through the communication interface; when the MCR branch control protection system detects When the MCR branch or load circuit current exceeds its first-stage or second-stage overcurrent setting, the DO interface will send an opening command to the outlet switch of each branch, and upload the protection alarm signal to the monitoring part to issue an alarm message.

本实用新型的有益效果是:该MCR型SVC静止式动态无功补偿装置提高了电网的电压稳定能力和功率因数,降低了电网损耗,实现了根据负荷变化情况进行快速、平滑调节使系统无功迅速达到平衡,提高补偿装置快速响应能力。本实用新型不仅结构简单、体积小、制造和维护成本低,而且运行稳定、易于维护。The beneficial effects of the utility model are: the MCR type SVC static dynamic reactive power compensation device improves the voltage stability and power factor of the power grid, reduces the loss of the power grid, and realizes fast and smooth adjustment according to the load change to make the system reactive Quickly achieve balance and improve the rapid response capability of the compensation device. The utility model is not only simple in structure, small in size, low in manufacturing and maintenance costs, but also stable in operation and easy in maintenance.

附图说明 Description of drawings

图1是本实用新型的原理框图;Fig. 1 is a block diagram of the utility model;

图2是图1所示FC支路保护系统的结构框图;Fig. 2 is a structural block diagram of the FC branch circuit protection system shown in Fig. 1;

图3是图1所示MCR支路控制保护系统的结构框图。Fig. 3 is a structural block diagram of the MCR branch circuit control and protection system shown in Fig. 1 .

具体实施方式 Detailed ways

如图1、图2和图3所示,该MCR型SVC静止式动态无功补偿装置,其主要由供电系统母线通过补偿出线开关向补偿母线供电,并设置有FC支路和MCR支路,所述FC支路包括电容器和固定电抗器,所述MCR支路包括磁阀式可控电抗器MCR,其特征是,还包括FC支路保护系统、MCR支路控制保护系统、控制电源系统、第一电压互感器、第二电压互感器、第一电流互感器、第二电流互感器、第三电流互感器和第四电流互感器。所述的FC支路和MCR支路通过各自的隔离开关与补偿母线连接;所述第一电流互感器设置在供电系统母线与补偿母线之间;所述第二电流互感器设置在FC支路与补偿母线之间;所述第三电流互感器设置在MCR支路与补偿母线之间;所述第四电流互感器设置在负载与供电系统母线之间;所述第一电压互感器与供电系统母线连接,所述第二电压互感器与补偿母线连接。As shown in Figure 1, Figure 2 and Figure 3, the MCR type SVC static dynamic reactive power compensation device mainly supplies power to the compensation bus from the power supply system bus through the compensation outlet switch, and is equipped with FC branch and MCR branch. The FC branch includes a capacitor and a fixed reactor, and the MCR branch includes a magnetic valve type controllable reactor MCR, which is characterized in that it also includes a FC branch protection system, an MCR branch control and protection system, a control power supply system, A first voltage transformer, a second voltage transformer, a first current transformer, a second current transformer, a third current transformer and a fourth current transformer. The FC branch and the MCR branch are connected to the compensation bus through respective isolation switches; the first current transformer is arranged between the power supply system bus and the compensation bus; the second current transformer is arranged in the FC branch and the compensation bus; the third current transformer is set between the MCR branch and the compensation bus; the fourth current transformer is set between the load and the power supply system bus; the first voltage transformer and the power supply The system bus is connected, and the second voltage transformer is connected to the compensation bus.

如图2所示,所述FC支路保护系统包括数据采集单元、处理器CPU和保护输出单元,所述FC支路保护系统的数据采集单元分别与第一电流互感器、第二电流互感器和FC支路相连。FC支路保护系统是一个以80C196芯片为核心的微机保护单元,通过采集FC支路和补偿出线柜电流和FC支路零序电压(也可采集不平衡电流、差压等电容器保护信号),按各种保护算法实现FC支路过流一段、过流二段、补偿出线柜过流一段、过流二段、不平衡电压(零序电压)、不平衡电流等保护功能。出现保护故障时,微机保护单元首先通过保护输出向补偿出线开关发送分闸指令,然后再通过RS232、RS485以及CAN总线等通讯接口向监控部分上传保护、报警信息。As shown in Figure 2, the FC branch protection system includes a data acquisition unit, a processor CPU and a protection output unit, and the data acquisition unit of the FC branch protection system is connected with the first current transformer and the second current transformer respectively Connected to FC branch. FC branch circuit protection system is a microcomputer protection unit with 80C196 chip as the core. By collecting FC branch circuit and compensating outlet cabinet current and FC branch circuit zero-sequence voltage (can also collect capacitor protection signals such as unbalanced current and differential pressure), According to various protection algorithms, the protection functions such as FC branch overcurrent stage one, overcurrent stage two, overcurrent stage one, overcurrent stage two, unbalanced voltage (zero sequence voltage), unbalanced current, etc. are realized. When a protection fault occurs, the microcomputer protection unit first sends an opening command to the compensation outlet switch through the protection output, and then uploads protection and alarm information to the monitoring part through communication interfaces such as RS232, RS485 and CAN bus.

如图3所示,所述MCR支路控制保护系统包括控制保护模块、监控模块和励磁模块,所述控制保护模块包括处理器CPU和分别与处理器CPU相连接的通讯单元、数据输入单元DI、数据输出单元DO、数据采样单元及光电接口电路;所述监控模块包括上位监控机和分别与上位监控机连接的显示单元和打印机,所述上位监控机与监控保护模块的通讯单元相连接;所述励磁模块包括依次串联的光电接口电路、脉冲电路、驱动放大电路和可控硅;所述的励磁模块和监控保护模块通过光电接口电路相连接;所述MCR支路控制保护系统的控制保护模块的数据采样单元分别与第三电流互感器、第四电流互感器和第一电压互感相连接;所述MCR支路控制保护系统的励磁模块的脉冲电路分别与第二电压互感器和第三电流互感器相连接。As shown in Figure 3, the MCR branch control and protection system includes a control and protection module, a monitoring module and an excitation module, and the control and protection module includes a processor CPU, a communication unit connected to the processor CPU, and a data input unit DI , a data output unit DO, a data sampling unit and a photoelectric interface circuit; the monitoring module includes an upper monitoring machine and a display unit and a printer connected to the upper monitoring machine respectively, and the upper monitoring machine is connected with the communication unit of the monitoring protection module; The excitation module includes a photoelectric interface circuit, a pulse circuit, a drive amplifier circuit and a thyristor connected in series in sequence; the excitation module and the monitoring and protection module are connected through a photoelectric interface circuit; the control and protection of the MCR branch control protection system The data sampling unit of the module is respectively connected with the third current transformer, the fourth current transformer and the first voltage transformer; the pulse circuit of the excitation module of the MCR branch control protection system is respectively connected with the second voltage transformer and the third voltage transformer. connected to the current transformer.

MCR支路控制保护系统的控制保护模块是一个基于80C196芯片的多CPU控制器,各组成部分相互之间通过多口RAM实现数据共享;控制算法以及保护逻辑由主控CPU实现,系统参数(电压、电流、有功、无功、功率因数等等)采集、计算由数据采集单元实现;专门负责通讯的通讯单元用来与上位监控机和其他监控系统交换数据,提供了RS232、RS485以及CAN总线等通讯接口,便于实现无人值守和远程控制。系统具有高度的可靠性、稳定性,而且运算速度快,能够实现复杂的控制算法。其大致工作原理是:首先,由数据采集单元采集到系统母线电压、负载电流和MCR支路电流模拟量信号,经A/D转换并计算出系统功率因数、有功和无功功率等实时值,存储于多口RAM中;处理器CPU按程序要求从RAM中读取所需参数;经过控制算法的计算,得出可控硅触发角给定值;再经过电光转换接口转换为光信号,通过光纤传送到MCR现场控制箱内的励磁模块。其次,励磁模块再将触发脉冲和可控硅的工作情况转换为光电信号回传给控制保护模块,用以实现对励磁模块的状态监测。控制保护器的自动运行模式判断和保护输出由数据输入DI和数据输出DO承担。在控制算法上可按不同要求实现分相控制、三相控制、闪变治理、功率因数控制、无功控制、恒电压控制。The control and protection module of the MCR branch control and protection system is a multi-CPU controller based on the 80C196 chip. The components share data with each other through the multi-port RAM; the control algorithm and protection logic are realized by the main control CPU, and the system parameters (voltage , current, active power, reactive power, power factor, etc.) acquisition and calculation are realized by the data acquisition unit; the communication unit specially responsible for communication is used to exchange data with the upper monitoring machine and other monitoring systems, providing RS232, RS485 and CAN bus, etc. Communication interface, easy to realize unattended and remote control. The system has high reliability, stability, and fast calculation speed, and can realize complex control algorithms. Its general working principle is as follows: First, the system bus voltage, load current and MCR branch current analog signals are collected by the data acquisition unit, and the real-time values such as system power factor, active power and reactive power are calculated through A/D conversion. Stored in the multi-port RAM; the processor CPU reads the required parameters from the RAM according to the program requirements; through the calculation of the control algorithm, the given value of the trigger angle of the thyristor is obtained; and then converted into an optical signal through the electro-optical conversion interface, through Fiber optics are sent to the excitation module inside the MCR field control box. Secondly, the excitation module converts the trigger pulse and the working condition of the thyristor into a photoelectric signal and sends it back to the control and protection module to realize the state monitoring of the excitation module. The automatic operation mode judgment and protection output of the control protector are undertaken by data input DI and data output DO. In terms of control algorithm, phase separation control, three-phase control, flicker control, power factor control, reactive power control, and constant voltage control can be realized according to different requirements.

MCR支路控制保护系统的励磁模块由光电接口电路、触发脉冲电路、脉冲放大电路和可控硅组成;光电接口电路接收到光给定信号后,经光电转换生成模拟量给定信号,形成控制可控硅导通角的触发脉冲,再将信号进行整形放大,对可控硅的导通状态进行移相控制,实现动态调节MCR支路感性无功电流的目的。The excitation module of the MCR branch control and protection system is composed of a photoelectric interface circuit, a trigger pulse circuit, a pulse amplifier circuit and a thyristor; after the photoelectric interface circuit receives the optical given signal, it generates an analog given signal through photoelectric conversion to form a control The trigger pulse of the conduction angle of the thyristor, and then the signal is shaped and amplified, and the conduction state of the thyristor is controlled by phase shifting, so as to realize the purpose of dynamically adjusting the inductive reactive current of the MCR branch.

MCR支路控制保护系统的监控模块由上位监控机、人机显示界面和其他相应终端器件构成;上位监控机可选择工控机、工业平板计算机和触摸屏。通过RS232、RS485以及CAN总线等通讯接口,与控制保护器的通讯单元连接,上传或下载在各种数据。上位监控软件运行于Windows XP操作系统,具有良好的人机界面,配置键盘、鼠标、打印机等外设。实现了系统参数设置、运行状态实时监测、运行趋势显示、保护报警信息及处理、历史数据查询和运行报表打印等各种功能。可以对系统的电能质量(包括电压、电流瞬时值,电压、电流有效值,有功功率,无功功率,有功电度,无功电度,功率因数,电流1---41次谐波,电压1---41次谐波,电压闪变,电压、电流不平衡,电压跌落,电压过高,电压丢失等)进行实时、连续的监测。The monitoring module of the MCR branch control and protection system is composed of an upper monitoring machine, a man-machine display interface and other corresponding terminal devices; the upper monitoring machine can choose an industrial computer, an industrial tablet computer and a touch screen. Through communication interfaces such as RS232, RS485 and CAN bus, it is connected with the communication unit of the control protector to upload or download various data. The host monitoring software runs on the Windows XP operating system, has a good man-machine interface, and is equipped with peripherals such as keyboard, mouse, and printer. Various functions such as system parameter setting, real-time monitoring of running status, running trend display, protection alarm information and processing, historical data query and running report printing have been realized. The power quality of the system (including voltage, current instantaneous value, voltage, current effective value, active power, reactive power, active energy, reactive energy, power factor, current 1---41 harmonic, voltage 1---41 harmonics, voltage flicker, voltage and current unbalance, voltage drop, voltage too high, voltage loss, etc.) for real-time and continuous monitoring.

MCR支路的过流保护分为硬保护和软保护两种措施;硬保护由MCR支路控制保护系统的励磁模块的脉冲电路实现,属于强制性过载保护,当MCR支路电流超过设定值时,脉冲电路直接封锁脉冲输出关断可控硅,同时向光电接口电路发送保护报警信号,通知控制保护部分MCR支路出现过流保护。软保护由MCR支路控制保护系统的控制保护模块通过软件实现,当控制保护部分检测到MCR支路或负载回路电流超过其一段或二段过流定值时,通过DO接口向各支路的出线开关发出分闸指令,并将保护报警信号上传至监控部分发出报警信息,其中,过流一段保护为速断保护,过流二段保护为带时限保护。除此以外,系统还提供了其他一些保护和报警功能。The overcurrent protection of the MCR branch is divided into two measures: hard protection and soft protection; the hard protection is realized by the pulse circuit of the excitation module of the MCR branch control protection system, which is a mandatory overload protection. When the MCR branch current exceeds the set value , the pulse circuit directly blocks the pulse output and turns off the thyristor, and at the same time sends a protection alarm signal to the photoelectric interface circuit, notifying the control and protection part of the MCR branch for overcurrent protection. The soft protection is implemented by the control and protection module of the MCR branch control and protection system through software. When the control and protection part detects that the current of the MCR branch or the load circuit exceeds its first-stage or second-stage overcurrent setting value, it will send a message to each branch through the DO interface. The outlet switch sends out an opening command, and uploads the protection alarm signal to the monitoring part to send out an alarm message. Among them, the over-current first-stage protection is quick-break protection, and the over-current second-stage protection is time-limited protection. In addition, the system also provides some other protection and alarm functions.

为了使控制回路正常工作,不但需要提供工作电源,而且,即使控制电源故障,还要保证全部设备受到保护;因此,控制电源系统必须具有掉电保护功能。控制电源系统是一个基于UPS的电源分配网络,在完成为各功能电路提供工作电源的前提下,同时保证电源的不间断供应。用来对控制电源保护动作后,提供整个系统进行相应故障保护的处理时间,保证系统按规定顺序退出运行,保护设备不受到损坏。In order to make the control circuit work normally, it is not only necessary to provide working power, but also to ensure that all equipment is protected even if the control power fails; therefore, the control power system must have a power-down protection function. The control power supply system is a UPS-based power distribution network, which guarantees the uninterrupted supply of power on the premise of providing working power for each functional circuit. It is used to provide processing time for the entire system to carry out corresponding fault protection after the control power supply protection action, to ensure that the system exits operation in the prescribed order, and protects the equipment from damage.

Claims (1)

1.MCR型SVC静止式动态无功补偿装置,其主要由供电系统母线通过补偿出线开关向补偿母线供电,并设置有FC支路和MCR支路,所述FC支路包括电容器和固定电抗器,所述MCR支路包括磁阀式可控电抗器MCR,其特征是,还包括FC支路保护系统、MCR支路控制保护系统、控制电源系统、第一电压互感器、第二电压互感器、第一电流互感器、第二电流互感器、第三电流互感器和第四电流互感器;1. MCR type SVC static dynamic reactive power compensation device, which is mainly powered by the power supply system busbar through the compensation outlet switch to the compensation busbar, and is equipped with FC branch and MCR branch. The FC branch includes capacitors and fixed reactors , the MCR branch includes a magnetic valve type controllable reactor MCR, which is characterized in that it also includes an FC branch protection system, an MCR branch control protection system, a control power supply system, a first voltage transformer, and a second voltage transformer , the first current transformer, the second current transformer, the third current transformer and the fourth current transformer; 所述的FC支路和MCR支路通过各自的隔离开关与补偿母线连接;所述第一电流互感器设置在供电系统母线与补偿母线之间;所述第二电流互感器设置在FC支路与补偿母线之间;所述第三电流互感器设置在MCR支路与补偿母线之间;所述第四电流互感器设置在负载与供电系统母线之间;所述第一电压互感器与供电系统母线连接,所述第二电压互感器与补偿母线连接;The FC branch and the MCR branch are connected to the compensation bus through respective isolation switches; the first current transformer is arranged between the power supply system bus and the compensation bus; the second current transformer is arranged in the FC branch and the compensation bus; the third current transformer is set between the MCR branch and the compensation bus; the fourth current transformer is set between the load and the power supply system bus; the first voltage transformer and the power supply The system bus is connected, and the second voltage transformer is connected to the compensation bus; 所述FC支路保护系统包括数据采集单元、处理器CPU和保护输出单元,所述FC支路保护系统的数据采集单元分别与第一电流互感器、第二电流互感器和FC支路相连;The FC branch protection system includes a data acquisition unit, a processor CPU and a protection output unit, and the data acquisition unit of the FC branch protection system is connected to the first current transformer, the second current transformer and the FC branch respectively; 所述MCR支路控制保护系统包括控制保护模块、监控模块和励磁模块,所述控制保护模块包括处理器CPU和分别与处理器CPU相连接的通讯单元、数据输入单元DI、数据输出单元DO、数据采样单元及光电接口电路;所述监控模块包括上位监控机和分别与上位监控机连接的显示单元和打印机,所述上位监控机与监控保护模块的通讯单元相连接;所述励磁模块包括依次串联的光电接口电路、脉冲电路、驱动放大电路和可控硅;所述的励磁模块和监控保护模块通过光电接口电路相连接;所述MCR支路控制保护系统的控制保护模块的数据采样单元分别与第三电流互感器、第四电流互感器和第一电压互感相连接;所述MCR支路控制保护系统的励磁模块的脉冲电路分别与第二电压互感器和第三电流互感器相连接。The MCR branch control and protection system includes a control and protection module, a monitoring module and an excitation module, and the control and protection module includes a processor CPU and a communication unit connected to the processor CPU, a data input unit DI, a data output unit DO, A data sampling unit and a photoelectric interface circuit; the monitoring module includes an upper monitoring machine and a display unit and a printer connected to the upper monitoring machine respectively, and the upper monitoring machine is connected with the communication unit of the monitoring and protection module; the excitation module includes sequentially A photoelectric interface circuit, a pulse circuit, a drive amplifier circuit and a thyristor connected in series; the excitation module and the monitoring and protection module are connected through the photoelectric interface circuit; the data sampling units of the control protection module of the MCR branch control protection system are respectively It is connected with the third current transformer, the fourth current transformer and the first voltage transformer; the pulse circuit of the excitation module of the MCR branch control protection system is respectively connected with the second voltage transformer and the third current transformer.
CN2011202054239U 2011-06-17 2011-06-17 MCR (Magnetically Controlled Reactor)-type static var compensator (SVC) Expired - Lifetime CN202103431U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103513133A (en) * 2013-09-27 2014-01-15 马钢(集团)控股有限公司 Device and method for measuring MCR type SVC device dynamic response time
CN104459303A (en) * 2014-12-24 2015-03-25 国家电网公司 Double-bus self-adaption sampling line selection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103513133A (en) * 2013-09-27 2014-01-15 马钢(集团)控股有限公司 Device and method for measuring MCR type SVC device dynamic response time
CN103513133B (en) * 2013-09-27 2017-01-04 马钢(集团)控股有限公司 The measurement apparatus of MCR type SVC device dynamic response time and method
CN104459303A (en) * 2014-12-24 2015-03-25 国家电网公司 Double-bus self-adaption sampling line selection device
CN104459303B (en) * 2014-12-24 2016-06-01 国家电网公司 A kind of adaptively sampled line selection apparatus of double-bus

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Patentee before: State Grid Corporation of China

TR01 Transfer of patent right

Effective date of registration: 20160606

Address after: 250400 Pingyin City, Shandong Province Kam Kam Road, East District, Kam Kok and the intersection of the northwest corner of the main street

Patentee after: PINGYIN POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER Co.

Patentee after: State Grid Corporation of China

Address before: 250400 Zhenxing street, Pingyin County, Ji'nan, Shandong

Patentee before: STATE GRID SHANDONG PINGYIN POWER SUPPLY CO.

Patentee before: State Grid Corporation of China

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20120104