WO2020057608A1 - 电流互感器及串联型静止同步补偿器 - Google Patents

电流互感器及串联型静止同步补偿器 Download PDF

Info

Publication number
WO2020057608A1
WO2020057608A1 PCT/CN2019/106721 CN2019106721W WO2020057608A1 WO 2020057608 A1 WO2020057608 A1 WO 2020057608A1 CN 2019106721 W CN2019106721 W CN 2019106721W WO 2020057608 A1 WO2020057608 A1 WO 2020057608A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
energy
power
winding circuit
threshold
Prior art date
Application number
PCT/CN2019/106721
Other languages
English (en)
French (fr)
Inventor
邓占锋
徐云飞
赵国亮
李卫国
刘海军
周哲
黄杰
乔光尧
康伟
石秋雨
曾洪涛
苏铁山
陈明庆
李芳义
靳艳娇
马美秀
Original Assignee
全球能源互联网研究院有限公司
国家电网有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 全球能源互联网研究院有限公司, 国家电网有限公司 filed Critical 全球能源互联网研究院有限公司
Publication of WO2020057608A1 publication Critical patent/WO2020057608A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]

Definitions

  • the present application relates to the field of power electronics technology, such as a current transformer and a series-type static synchronous compensator.
  • SSSC Series Static Synchronous Compensator
  • STATCOM Parallel Static Synchronous Compensator
  • SSSC works in current source mode, and its current depends on the line flow.
  • PWM Pulse Width Modulation
  • the SSSC power unit usually adopts the external energy transmission method.
  • the external energy delivery method of the power unit is the traditional way of taking energy from the converter valve. The insulation design of the energy taking transformer is difficult, and the power density of the converter valve body will be greatly reduced.
  • the present application provides a current transformer and a series-type static synchronous compensator using the energy to avoid the situation that the insulation design of the energy-capturing transformer in the series-type static synchronous compensator is difficult and reduces the power density of the converter valve body.
  • An embodiment of the present application provides a current transformer, including: an iron core, a main winding circuit, an energy-taking winding circuit, an auxiliary winding circuit, and a microprocessor; the main winding circuit, the energy-taking winding circuit, and an auxiliary winding circuit, respectively Around the iron core, the main winding circuit, the energy-taking winding circuit and the auxiliary winding circuit are respectively connected to the microprocessor, and the main loop of the series-type static synchronous compensator is connected to the main winding circuit and The power unit of the series-type static synchronization compensator is connected, and the power unit of the series-type static synchronization compensator is connected to the energy-taking winding circuit; and the current generation in accordance with the current in the main circuit of the series-type static synchronization compensator is generated.
  • the microprocessor controls the energy-taking winding circuit to supply power to the power unit of the series-type static synchronous compensator according to the induced current, and controls the auxiliary winding circuit to supply power to the load according to the
  • An embodiment of the present application further provides a series-type static synchronous compensator, including the current transformer according to any one of the foregoing embodiments.
  • FIG. 1 is a schematic structural diagram of a current transformer according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of an energy-taking winding circuit of a current transformer according to an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of an auxiliary winding circuit of a current transformer according to an embodiment of the present application.
  • An embodiment of the present application provides a current transformer, as shown in FIG. 1, including: an iron core 1, a main winding circuit 2, an energy-taking winding circuit 3, an auxiliary winding circuit 4, and a microprocessor 5, the main winding circuit 2, and a
  • the energy winding circuit 3 and the auxiliary winding circuit 4 are respectively wound on the iron core 1, the main winding circuit 2, the energy-taking winding circuit 3 and the auxiliary winding circuit 4 are respectively connected to the microprocessor 5, and the main circuit 6 of the series-type static synchronous compensator It is connected to the main winding circuit 2 and the power unit 7 of the series-type static synchronous compensator respectively.
  • the power unit 7 of the series-type static synchronous compensator is connected to the energy-taking winding circuit 3.
  • the main winding circuit 2 is The current in the loop 6 generates an induced current.
  • the microprocessor 5 controls the energy-taking winding circuit 3 to supply power to the series-type static synchronous compensator power unit 7 according to the induced current, and controls the auxiliary winding circuit 4 to supply power to the load according to the induced current.
  • the current transformer is designed to share one iron core by designing the main winding circuit, the energy-taking winding circuit and the auxiliary winding circuit, and the main winding circuit (primary winding) is used to obtain a series static synchronous compensator (Static Synchonous Series Compensator). , SSSC)
  • the induced current is generated by the current in the main circuit.
  • the power unit in the SSSC is powered by the energy-taking winding circuit (secondary-side winding), and the auxiliary winding circuit (secondary-side winding) is set to consume excess energy in the induced current.
  • the two secondary windings are excited at the same time to ensure that the output voltage of the energy-taking winding circuit is stable, and the magnetic flux of the two windings is reasonably distributed, which improves the winding utilization rate, avoids the difficulty in designing the energy-absorbing transformer in SSSC, and reduces the converter valve body.
  • the power density provides solid technical support for SSSC's engineering applications.
  • the energy-taking winding circuit 3 is connected to the power unit 7 of the series-type static synchronous compensator.
  • the microprocessor 5 obtains the induced current, and judges the magnitude relationship between the induced current and the first threshold and the second threshold. When the current is greater than the first threshold and less than the second threshold, the microprocessor 5 controls the energy-taking winding circuit 3 to supply power to the power unit 7 of the series-type static synchronous compensator; when the induced current is greater than the second threshold, the microprocessing The controller 5 controls the energy-taking winding circuit 3 to supply power to the power unit 7 of the series-type static synchronous compensator. At the same time, the microprocessor 5 controls the auxiliary winding circuit 4 to supply power to the load.
  • the second threshold value is greater than the first threshold value.
  • the microprocessor 5 controls the power-taking winding circuit 3 to be the power of the series static synchronous compensator.
  • the unit 7 supplies power.
  • the microprocessor 5 controls the auxiliary winding circuit 4 to supply power to the load.
  • the two secondary windings consume the induced current at the same time, which can ensure the stability of the output voltage of the energy-taking winding circuit 3 and improve the use of the induced current.
  • the induced current can only provide energy to the energy-taking winding circuit 3.
  • the microprocessor 5 only controls the energy-taking winding
  • the circuit 3 supplies power to the power unit 7 of the series-type static synchronous compensator, and ensures the power supply amount of the power unit 7 of the series-type static synchronous compensator.
  • the energy-capturing winding circuit 3 includes: an energy-capturing winding 31, a rectifier circuit 32, a first load circuit 33, an input capacitor 34, a power module 35, and an output capacitor 36; the rectifier circuit 32 Connected to both ends of the energy-taking winding 31 and configured to convert the AC signal generated by the energy-taking winding 31 according to the induced current into a DC signal and output; a first end of the first load circuit 33, a first end of the input capacitor 34, The first terminal of the power module 35 and the first terminal of the output capacitor 36 are connected to the first terminal of the rectifier circuit 32, the second terminal of the first load circuit 33, the second terminal of the input capacitor 34, the second terminal of the power module 35 and The second end of the output capacitor 36 is the second end of the rectifier circuit 32.
  • the power unit 7 of the series-type static synchronous compensator is connected in parallel to both ends of the power module 35.
  • the direct current signal output by the rectifier circuit 32 is the first load circuit 33,
  • the input capacitor 34 supplies power.
  • the input capacitor 34 supplies power to the power module 35 and the output capacitor 36.
  • the power module 35 supplies power to the power unit 7 of the series-type static synchronous compensator.
  • the energy-taking winding circuit 3 further includes: a first switch 37 and a second switch 38; the first switch 37 is connected between the rectifier circuit 32 and the first load circuit 33, and the second The switch 38 is connected between the rectifier circuit 32 and the input capacitor 34; the microprocessor 5 obtains the electric energy in the input capacitor 34 and judges the magnitude relationship between the electric energy and the third threshold value and the fourth threshold value; when the electric energy in the input capacitor 34 is lower than At the third threshold, the microprocessor 5 controls the first switch 37 to open, the second switch 38 is closed, and the direct current signal supplies power to the input capacitor 34.
  • the microprocessor 5 controls the first The switch 37 is closed, the second switch 38 is opened, the direct current signal supplies power to the first load circuit 33, the input capacitor 34 supplies power to the power module 35 and the output capacitor 36, and the power module 35 supplies power to the power unit 7 of the series static synchronous compensator.
  • the third threshold value is smaller than the fourth threshold value.
  • the The processor 5 controls the first switch 37 to be opened, the second switch 38 to be closed, and the direct current signal to power the input capacitor 34.
  • the power in the input capacitor 34 is high, that is, when the power in the input capacitor 34 is higher than the fourth threshold,
  • the processor 5 controls the first switch 37 to be closed and the second switch 38 to be opened.
  • the direct current signal supplies power to the first load circuit 33.
  • the input capacitor 34 supplies power to the power module 35 and the output capacitor 36.
  • the power module 35 is a serial static compensator.
  • the power unit 7 supplies power.
  • a power supply module 35 and a first load circuit 33 are provided in the energy-taking winding circuit 3.
  • the power module 35 is used to store energy to supply power to the power unit 7 to ensure the stability of power supply.
  • the first load circuit 33 is set to Working under the condition that the electric energy in the input capacitor 34 is higher than the fourth threshold, the utilization rate of the induced current is improved.
  • the auxiliary winding circuit 4 includes an auxiliary winding 41 and a bidirectional solid-state switch 42.
  • the load is a second load circuit 43.
  • the bidirectional solid-state switch 42 is connected to the auxiliary winding 41 and the second load circuit 43.
  • the second load circuit 43 is connected between the auxiliary winding 41 and the bidirectional solid-state switch 42; when the induced current is greater than the first threshold and less than the second threshold, the microprocessor controls 5 the bidirectional solid-state switch 42 is turned on; When the current is greater than the second threshold, the microprocessor-controlled 5-way solid state switch 42 is turned off, and the auxiliary winding 41 generates a current signal according to the induced current to power the second load circuit 43.
  • the main winding circuit 2 is wound on the iron core 1 through the main winding
  • the energy-taking winding circuit 3 is wound on the iron core 1 through the energy-taking winding
  • the auxiliary winding circuit 4 is wound on the iron core 1 through the auxiliary winding 41
  • the number of turns of the main winding, energy-taking winding 31 and auxiliary winding 41 is obtained according to formula (1):
  • N 1 is the number of turns of the main winding
  • N 2 is the number of turns of the energizing winding
  • N 3 is the number of turns of the auxiliary winding
  • I 1 is the induced current in the main winding
  • I 2 is the alternating current in the energy winding
  • I 3 is Alternating current in the auxiliary winding.
  • the AC power in the energy-taking winding 31 and the auxiliary winding 41 are different.
  • the AC power in the energy-taking winding 31 is 5A
  • the AC power in the auxiliary winding 41 is 3A.
  • the number of turns of the main winding is determined according to the maximum value of the main winding current and the maximum magnetic flux density of the CT core (to ensure that the working magnetic density is about 50 to 60% of the saturated magnetic density and the winding loss is guaranteed under the condition of the maximum input current. Low)
  • the magnetic field energy of the auxiliary winding 41 should be greater than the rated capacity.
  • the main winding current is the maximum
  • the current of the auxiliary winding 41 and the energy-taking winding 31 should be less than the rated current. Take the number of turns of the winding 31, where the rated capacity and the rated current are both known quantities.
  • the current in the SSSC main circuit is large and the variation range is wide. Therefore, switches are respectively provided in the energy-taking winding circuit 3 and the auxiliary winding circuit 4.
  • the first A switch and a bidirectional solid-state switch enable the energizing winding circuit 3 and the auxiliary winding circuit 4 to work at the same time.
  • the bidirectional solid-state switch is turned on, so that the auxiliary winding circuit 4 is in an open state, ensuring the output of the energizing winding.
  • the stability of the voltage and the reasonable distribution of the magnetic flux of the two windings improve the winding utilization rate.
  • An embodiment of the present application further provides a series-type static synchronous compensator including the above-mentioned current transformer.
  • the main winding circuit of the current transformer and the main circuit of the series-type static synchronous compensator are connected in series to generate an induced current.
  • the energy-taking winding circuit through the current transformer is a series-type static synchronization.
  • the power unit of the compensator is used to supply power, and the auxiliary winding circuit is used to consume the excess energy in the induced current.
  • the energy-taking winding and the auxiliary winding are excited at the same time to ensure the stable output voltage of the energy-taking winding, and the magnetic flux of the two windings is reasonably distributed, which improves the winding utilization rate. It avoids the difficult design of energy-insulating transformer insulation in SSSC, and reduces the power density of the converter valve body, and provides solid technical support for the engineering application of SSSC.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Ac-Ac Conversion (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

一种电流互感器及使用其取能的串联型静止同步补偿器，该电流互感器包括：铁芯(1)、主绕组电路(2)、取能绕组电路(3)、辅助绕组电路(4)以及微处理器(5)；主绕组电路(2)、取能绕组电路(3)和辅助绕组电路(4)分别绕在铁芯(1)上，主绕组电路(2)、取能绕组电路(3)和辅助绕组电路(4)分别与微处理器(5)连接，串联型静止同步补偿器的主回路(6)分别与主绕组电路(2)和串联型静止同步补偿器的功率单元(7)连接，串联型静止同步补偿器的功率单元(7)与取能绕组电路(3)连接；主绕组电路(2)根据串联型静止同步补偿器主回路(6)中的电流产生感应电流，微处理器(5)根据感应电流控制取能绕组电路(3)为串联型静止同步补偿器的功率单元(7)供电，并根据感应电流控制辅助绕组电路(4)为负载供电。

Description

电流互感器及串联型静止同步补偿器
本申请要求在2018年9月21日提交中国专利局、申请号为201811113177.7的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电力电子技术领域，例如一种电流互感器及串联型静止同步补偿器。
背景技术
串联型静止同步补偿器(Static Synchonous Series Compensator，SSSC)是一种串联于电力线路的潮流调节控制装置。SSSC通过高压串联变压器接入高压输电线路，通过改变串联变压器两端电压实现线路潮流控制。SSSC主回路电流由线路电流、变压器参数共同决定。SSSC不同于并联型静止同步补偿器(Static Synchronous Compensator，STATCOM)，SSSC工作于电流源模式，其电流大小取决于线路潮流。进而，SSSC功率单元直流电压建立需要经过脉宽调制(Pulse Width Modulation，PWM)控制。因此，SSSC功率单元通常采用外送能方式。功率单元的外送能方式为传统换流阀取能方式，取能变压器绝缘设计难度大，且将大幅度降低换流阀体功率密度。
发明内容
本申请提供一种电流互感器及使用其取能的串联型静止同步补偿器，以避免串联型静止同步补偿器中取能变压器绝缘设计难度大且降低换流阀体功率密度的情况。
本申请提供的技术方案如下：
本申请实施例提供一种电流互感器，包括：铁芯、主绕组电路、取能绕组电路、辅助绕组电路和微处理器；所述主绕组电路、所述取能绕组电路和辅助绕组电路分别绕在铁芯上，所述主绕组电路、所述取能绕组电路和所述辅助绕组电路分别与所述微处理器连接，串联型静止同步补偿器的主回路分别与所述主绕组电路和所述串联型静止同步补偿器的功率单元连接，所述串联型静止同 步补偿器的功率单元与所述取能绕组电路连接；所述根据所述串联型静止同步补偿器主回路中的电流产生感应电流，所述微处理器根据所述感应电流控制所述取能绕组电路为所述串联型静止同步补偿器的功率单元供电，并根据所述感应电流控制所述辅助绕组电路为负载供电。
本申请实施例还提供一种串联型静止同步补偿器，包括：上述任意一项实施例所述的电流互感器。
附图说明
图1为本申请一实施例中电流互感器的结构原理图；
图2为本申请一实施例中电流互感器的取能绕组电路的结构原理图；
图3为本申请一实施例中电流互感器的辅助绕组电路的结构原理图。
附图标记说明：
1-铁芯；2-主绕组电路；3-取能绕组电路；4-辅助绕组电路；5-微处理器；6-串联型静止同步补偿器的主回路；7-串联型静止同步补偿器的功率单元；31-取能绕组；32-整流电路；33-第一负载电路；34-输入电容；35-电源模块；36-输出电容；37-第一开关；38-第二开关；41-辅助绕组；42-双向固态开关；43-第二负载电路。
具体实施方式
在本申请的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
此外，下面所描述的本申请不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
本申请实施例提供一种电流互感器，如图1所示，包括：铁芯1、主绕组电路2、取能绕组电路3、辅助绕组电路4和微处理器5，主绕组电路2、取能绕组电路3和辅助绕组电路4分别绕在铁芯1上，主绕组电路2、取能绕组电路3和辅助绕组电路4分别与微处理器5连接，串联型静止同步补偿器的主回路6分别与主绕组电路2和串联型静止同步补偿器的功率单元7连接，串联型静止同步补偿器的功率单元7与取能绕组电路3连接；主绕组电路2根据串联型静止同步补偿器的主回路6中的电流产生感应电流，微处理器5根据感应电流控制取能绕组电路3为串联型静止同步补偿器的功率单元7供电，并根据感应电流控制辅助绕组电路4为负载供电。
本申请实施例中，该电流互感器通过设计主绕组电路、取能绕组电路和辅助绕组电路共用一个铁芯，利用主绕组电路(一次侧绕组)获取串联型静止同步补偿器(Static Synchonous Series Compensator，SSSC)主回路中的电流产生感应电流，利用取能绕组电路(二次侧绕组)为SSSC中的功率单元供电，辅助绕组电路(二次侧绕组)设置为消耗感应电流中多余的能量，两个二次侧绕组同时励磁，保证取能绕组电路输出电压稳定，且合理分配两绕组磁通，提高了绕组利用率，避免了SSSC中取能变压器绝缘设计难度大，且降低换流阀体功率密度的情况，为SSSC的工程应用提供坚实的技术支持。
本申请实施例中，取能绕组电路3连接串联型静止同步补偿器的功率单元7，微处理器5获取感应电流，并分别判断感应电流与第一阈值、第二阈值的大小关系，在感应电流大于第一阈值且小于第二阈值的情况下，微处理器5控制取能绕组电路3为串联型静止同步补偿器的功率单元7供电；在感应电流大于第二阈值的情况下，微处理器5控制取能绕组电路3为串联型静止同步补偿器的功率单元7供电，同时，微处理器5控制辅助绕组电路4为负载供电。
本申请实施例中，第二阈值大于第一阈值，在感应电流足够大，即感应电流大于第二阈值的情况下，微处理器5控制取能绕组电路3为串联型静止同步补偿器的功率单元7供电，同时，微处理器5控制辅助绕组电路4为负载供电，两个二次侧绕组同时消耗感应电流，可以保证取能绕组电路3输出电压的稳定性，并且提高了感应电流的利用率；而在感应电流较小，即感应电流大于第一 阈值且小于第二阈值的情况下，感应电流只能给取能绕组电路3提供能量，此时，微处理器5只控制取能绕组电路3为串联型静止同步补偿器的功率单元7供电，保证了串联型静止同步补偿器的功率单元7的供电量。
在一实施例中，如图2所示，取能绕组电路3包括：取能绕组31、整流电路32、第一负载电路33、输入电容34、电源模块35，以及输出电容36；整流电路32连接于取能绕组31的两端，设置为将取能绕组31根据感应电流产生的交流电信号转变为直流电信号并输出；第一负载电路33的第一端、输入电容34的第一端、电源模块35的第一端和输出电容36的第一端连接整流电路32的第一端，第一负载电路33的第二端、输入电容34的第二端、电源模块35的第二端和输出电容36的第二端所述整流电路32的第二端，串联型静止同步补偿器的功率单元7并联于电源模块35的两端；整流电路32输出的直流电信号为第一负载电路33、输入电容34供电，输入电容34为电源模块35和输出电容36供电，电源模块35为串联型静止同步补偿器的功率单元7供电。
在一实施例中，如图2所示，取能绕组电路3还包括：第一开关37和第二开关38；第一开关37连接于整流电路32和第一负载电路33之间，第二开关38连接于整流电路32和输入电容34之间；微处理器5获取输入电容34中的电能，并分别判断电能与第三阈值、第四阈值的大小关系；当输入电容34中电能低于第三阈值时，微处理器5控制第一开关37打开，第二开关38闭合，直流电信号为输入电容34供电；当输入电容34中电能高于第四阈值时，微处理器5控制第一开关37闭合，第二开关38打开，直流电信号为第一负载电路33供电，输入电容34为电源模块35和输出电容36供电，电源模块35为串联型静止同步补偿器的功率单元7供电。
本申请实施例中，第三阈值小于第四阈值，在输入电容34中电能较低不足以给电源模块35供电的情况下，即在输入电容34中电能低于第三阈值的情况下，微处理器5控制第一开关37打开，第二开关38闭合，直流电信号为输入电容34供电；在输入电容34中电能较高，即当输入电容34中电能高于第四阈值的情况下，微处理器5控制第一开关37闭合，第二开关38打开，直流电信号为第一负载电路33供电，输入电容34为电源模块35和输出电容36供电，电源模块35为串联型静止同步补偿器的功率单元7供电，在取能绕组电路3中设置了电源模块35和第一负载电路33，利用电源模块35储能为功率单元7供 电，保证了供电的稳定性，第一负载电路33设置为在输入电容34中电能高于第四阈值的情况下工作，提高了感应电流的利用率。
在一实施例中，如图3所示，辅助绕组电路4包括：辅助绕组41和双向固态开关42，负载为第二负载电路43，双向固态开关42连接于辅助绕组41和第二负载电路43之间，第二负载电路43连接于辅助绕组41和双向固态开关42之间；在感应电流大于第一阈值且小于第二阈值的情况下，微处理器控制5双向固态开关42打开；在感应电流大于第二阈值的情况下，微处理器控制5双向固态开关42关闭，辅助绕组41根据感应电流产生电流信号为第二负载电路43供电。
本申请实施例中，主绕组电路2通过主绕组绕在铁芯1上，取能绕组电路3通过取能绕组绕31在铁芯1上，辅助绕组电路4通过辅助绕组41绕在铁芯1上，主绕组、取能绕组31和辅助绕组41的匝数根据公式(1)得到：
N 1I 1-N 2I 2-N 3I 3≈0     公式(1)
其中，N 1为主绕组匝数，N 2为取能绕组匝数，N 3为辅助绕组匝数，I 1为主绕组中的感应电流，I 2为取能绕组中的交流电，I 3为辅助绕组中的交流电。
本申请实施例中，SSSC工作系统的电压不同时，取能绕组31和辅助绕组41中的交流电不同，以220kV系统SSSC为例，取能绕组31中交流电为5A，辅助绕组41中交流电为3A，其次，根据主绕组电流最大值以及CT铁芯的最大磁通密度确定主绕组匝数(保证在输入电流最大的情况下，工作磁密为饱和磁密的50～60％左右并保证绕组损耗较低)，根据主绕组电流为最小值时，辅助绕组41磁场能量应大于额定容量，主绕组电流为最大时，辅助绕组41与取能绕组31的电流应小于额定电流，确定辅助绕组41和取能绕组31的匝数，其中额定容量和额定电流均为已知量。
本申请实施例中，SSSC主回路中的电流较大且变化范围较宽，因此在取能绕组电路3和辅助绕组电路4中分别设置开关，当SSSC主回路中电流较大时，分别闭合第一开关和双向固态开关，使得取能绕组电路3和辅助绕组电路4同时工作，当SSSC主回路中电流减小时，打开双向固态开关，使得辅助绕组电路4处于开路状态，保证了取能绕组输出电压的稳定性，且合理分配两绕组磁通，提高了绕组利用率。
本申请实施例还提供一种串联型静止同步补偿器，包括上述电流互感器。
本申请实施例提供的串联型静止同步补偿器，电流互感器的主绕组电路与串联型静止同步补偿器的主回路串联，产生感应电流，通过电流互感器的取能绕组电路为串联型静止同步补偿器的功率单元供电，同时利用辅助绕组电路消耗感应电流中多余的能量，取能绕组和辅助绕组同时励磁，保证取能绕组输出电压稳定，且合理分配两绕组磁通，提高了绕组利用率，避免了SSSC中取能变压器绝缘设计难度大，且降低换流阀体功率密度的情况，为SSSC的工程应用提供坚实的技术支持。

Claims (6)

  1. 一种电流互感器，包括：铁芯、主绕组电路、取能绕组电路、辅助绕组电路以及微处理器；
    所述主绕组电路、所述取能绕组电路和所述辅助绕组电路分别绕在所述铁芯上，所述主绕组电路、所述取能绕组电路和所述辅助绕组电路分别与所述微处理器连接，串联型静止同步补偿器的主回路分别与所述主绕组电路和所述串联型静止同步补偿器的功率单元连接，所述串联型静止同步补偿器的功率单元与所述取能绕组电路连接；
    所述主绕组电路设置为根据所述串联型静止同步补偿器主回路中的电流产生感应电流，所述微处理器设置为根据所述感应电流控制所述取能绕组电路为所述串联型静止同步补偿器的功率单元供电，并根据所述感应电流控制所述辅助绕组电路为负载供电。
  2. 如权利要求1所述的电流互感器，其中，所述取能绕组电路连接所述串联型静止同步补偿器的功率单元，所述微处理器设置为：
    获取所述感应电流，并分别判断所述感应电流与第一阈值和第二阈值的大小关系，其中，所述第二阈值大于第一阈值；
    在所述感应电流大于第一阈值且小于第二阈值的情况下，控制所述取能绕组电路为所述串联型静止同步补偿器的功率单元供电；
    在所述感应电流大于第二阈值的情况下，控制所述取能绕组电路为所述串联型静止同步补偿器的功率单元供电，同时，控制所述辅助绕组电路为负载供电。
  3. 如权利要求2所述的电流互感器，其中，所述取能绕组电路包括：取能绕组、整流电路、第一负载电路、输入电容、电源模块，以及输出电容；
    所述整流电路连接于所述取能绕组的两端，设置为将所述取能绕组根据所述感应电流产生的交流电信号转变为直流电信号并输出；
    所述第一负载电路的第一端、所述输入电容的第一端、所述电源模块的第一端和所述输出电容的第一端连接所述整流电路的第一端，所述第一负载电路的第二端、所述输入电容的第二端、所述电源模块的第二端和所述输出电容的第二端连接所述整流电路的第二端，所述串联型静止同步补偿器的功率单元与所述电源模块并联；
    所述整流电路输出的所述直流电信号为所述第一负载电路、所述输入电容 供电，所述输入电容为所述电源模块和所述输出电容供电，所述电源模块为所述串联型静止同步补偿器的功率单元供电。
  4. 如权利要求3所述的电流互感器，其中，所述取能绕组电路还包括：第一开关和第二开关；
    所述第一开关连接于所述整流电路和所述第一负载电路之间，所述第二开关连接于所述整流电路和所述输入电容之间；
    所述微处理器设置为：
    获取所述输入电容中的电能，并分别判断所述电能与第三阈值、第四阈值的大小关系，其中，所述第四阈值大于第三阈值；
    在所述输入电容中电能低于第三阈值的情况下，控制所述第一开关打开，所述第二开关闭合，使所述直流电信号为所述输入电容供电；
    在所述输入电容中电能高于第四阈值的情况下，控制所述第一开关闭合，所述第二开关打开，使所述直流电信号为所述第一负载电路供电，所述输入电容为所述电源模块和所述输出电容供电，所述电源模块为所述串联型静止同步补偿器的功率单元供电。
  5. 如权利要求2所述的电流互感器，其中，所述辅助绕组电路还包括：辅助绕组和双向固态开关，所述负载为第二负载电路，所述双向固态开关连接于所述辅助绕组和所述第二负载电路之间，所述第二负载电路连接于所述辅助绕组和所述双向固态开关之间；
    所述微处理器设置为：在所述感应电流大于所述第一阈值且小于所述第二阈值的情况下，控制所述双向固态开关打开；
    在所述感应电流大于所述第二阈值的情况下，控制所述双向固态开关关闭，使所述辅助绕组根据所述感应电流产生电流信号为所述第二负载电路供电。
  6. 一种串联型静止同步补偿器，包括：如权利要求1-5中任一项所述的电流互感器。
PCT/CN2019/106721 2018-09-21 2019-09-19 电流互感器及串联型静止同步补偿器 WO2020057608A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811113177.7 2018-09-21
CN201811113177.7A CN109193959B (zh) 2018-09-21 2018-09-21 取能用电流互感器及使用其取能的静止同步串联补偿装置

Publications (1)

Publication Number Publication Date
WO2020057608A1 true WO2020057608A1 (zh) 2020-03-26

Family

ID=64909524

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/106721 WO2020057608A1 (zh) 2018-09-21 2019-09-19 电流互感器及串联型静止同步补偿器

Country Status (2)

Country Link
CN (1) CN109193959B (zh)
WO (1) WO2020057608A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109193959B (zh) * 2018-09-21 2024-09-17 全球能源互联网研究院有限公司 取能用电流互感器及使用其取能的静止同步串联补偿装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102790434A (zh) * 2012-07-27 2012-11-21 国电南瑞科技股份有限公司 一种电流互感器自取能电路
CN104134968A (zh) * 2014-08-05 2014-11-05 南京南瑞继保电气有限公司 一种统一潮流控制器的保护方法及系统
CN104333001A (zh) * 2014-11-26 2015-02-04 国家电网公司 一种分布式串联耦合型潮流控制器
CN105591384A (zh) * 2014-11-14 2016-05-18 国家电网公司 一种分布式同步串联补偿器
US20160197545A1 (en) * 2014-03-10 2016-07-07 Fuji Electric Co., Ltd. Current detector and power conversion device
CN109193959A (zh) * 2018-09-21 2019-01-11 全球能源互联网研究院有限公司 取能用电流互感器及使用其取能的静止同步串联补偿装置
CN209170055U (zh) * 2018-09-21 2019-07-26 全球能源互联网研究院有限公司 取能用电流互感器及使用其取能的静止同步串联补偿装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102790434A (zh) * 2012-07-27 2012-11-21 国电南瑞科技股份有限公司 一种电流互感器自取能电路
US20160197545A1 (en) * 2014-03-10 2016-07-07 Fuji Electric Co., Ltd. Current detector and power conversion device
CN104134968A (zh) * 2014-08-05 2014-11-05 南京南瑞继保电气有限公司 一种统一潮流控制器的保护方法及系统
CN105591384A (zh) * 2014-11-14 2016-05-18 国家电网公司 一种分布式同步串联补偿器
CN104333001A (zh) * 2014-11-26 2015-02-04 国家电网公司 一种分布式串联耦合型潮流控制器
CN109193959A (zh) * 2018-09-21 2019-01-11 全球能源互联网研究院有限公司 取能用电流互感器及使用其取能的静止同步串联补偿装置
CN209170055U (zh) * 2018-09-21 2019-07-26 全球能源互联网研究院有限公司 取能用电流互感器及使用其取能的静止同步串联补偿装置

Also Published As

Publication number Publication date
CN109193959B (zh) 2024-09-17
CN109193959A (zh) 2019-01-11

Similar Documents

Publication Publication Date Title
US9787199B2 (en) Power conversion device to control power distribution of input power to multiple outputs
JPH0586147B2 (zh)
CN102664528B (zh) 一种开关电源
CN104300785B (zh) 功率转换器
EP4016837A1 (en) Electric drive system, power assembly, and electric vehicle
EP3021472B1 (en) Switching element driving power supply circuit
Fang et al. Energy feedback control of light-load voltage regulation for LLC resonant converter
JP6667750B1 (ja) Ｄｃ−ｄｃコンバータ
WO2022127049A1 (zh) 谐振槽电路、宽电压输入输出电源和电子设备
Mazumder et al. A low-device-count single-stage direct-power-conversion solar microinverter for microgrid
CN104901550B (zh) 一种基于可变电感网络的双全桥dc/dc变换器
WO2020057608A1 (zh) 电流互感器及串联型静止同步补偿器
KR20220044996A (ko) 차량-그리드-홈 전력 인터페이스
CN103326650A (zh) 一种发电机的自并励励磁系统
CN108768178B (zh) 一种宽电压输入的llc谐振半桥电路
JP2021019396A (ja) 双方向ｄｃ／ｄｃコンバータ
CN209170055U (zh) 取能用电流互感器及使用其取能的静止同步串联补偿装置
CN210429529U (zh) 一种基于二次侧并联型分数阶电路的无铁芯变压器
CN210429528U (zh) 一种基于二次侧串联型分数阶电路的无铁芯变压器
CN114142749B (zh) 一种基于磁通的宽范围连续可调高压直流电源
JP2021035077A (ja) 無線給電装置
RU117744U1 (ru) Преобразователь
CN205304250U (zh) 一种低压配电节电器
CN203278661U (zh) 一种变压器调压系统
EP4106173A1 (en) Direct-current converter, electronic device and charger

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19861879

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19861879

Country of ref document: EP

Kind code of ref document: A1