WO2012037770A1 - 一种新型直流换流阀晶闸管电流断续保护实现方法 - Google Patents

一种新型直流换流阀晶闸管电流断续保护实现方法 Download PDF

Info

Publication number
WO2012037770A1
WO2012037770A1 PCT/CN2011/001003 CN2011001003W WO2012037770A1 WO 2012037770 A1 WO2012037770 A1 WO 2012037770A1 CN 2011001003 W CN2011001003 W CN 2011001003W WO 2012037770 A1 WO2012037770 A1 WO 2012037770A1
Authority
WO
WIPO (PCT)
Prior art keywords
thyristor
voltage
current
trigger
trigger interval
Prior art date
Application number
PCT/CN2011/001003
Other languages
English (en)
French (fr)
Inventor
魏晓光
王华锋
陈龙龙
Original Assignee
中国电力科学研究院
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 中国电力科学研究院 filed Critical 中国电力科学研究院
Priority to US13/255,500 priority Critical patent/US20120194957A1/en
Publication of WO2012037770A1 publication Critical patent/WO2012037770A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection

Definitions

  • the invention relates to the field of power system devices, in particular to a method for realizing current interrupt protection of a novel DC converter valve thyristor. Background technique
  • the converter valve is the most important primary device for DC transmission.
  • the thyristor current is intermittent, the thyristor will naturally turn off at the zero crossing point of the current, which is determined by the characteristics of the thyristor. If a positive overvoltage occurs after the thyristor is turned off, TE will not send a trigger pulse at this time, and the thyristor may be damaged.
  • the TE design automatically re-trigger function.
  • the forward voltage of the thyristor reaches +100V, and the thyristor is automatically re-triggered, thus ensuring the safety of the thyristor and the system. Reliable operation.
  • the converter valve is purchased from foreign equipment, and TE is also a foreign device. Therefore, the current interrupted re-trigger technology of the thyristor has not been deeply studied and discussed.
  • the present invention In-depth study of the basic principle of thyristor intermittent repeated triggering, through TE open detection window, detection of forward voltage level re-trigger thyristor, has a high degree of innovation and feasibility.
  • invention patent application CN200720173252 DC converter valve low voltage parameter operation test device mentioned that the low voltage and high current circuit is cut off, and the back-to-back high voltage and small current loop is adjusted to current interruption, and the current interruption test can be completed.
  • the invention provides a test method for current interrupting of a converter valve, and does not provide a method for realizing current interrupt protection of the converter valve. At present, there is no similar technical invention at home and abroad.
  • the invention designs a method for realizing current interrupt protection, which is highly innovative, simple and convenient to implement. Summary of the invention
  • the thyristor During normal operation of the DC transmission converter valve, when the voltage of the thyristor anode and cathode is positive, and the thyristor electronics (TE) sends a start pulse, the thyristor is normally triggered. If the current across the thyristor is suddenly interrupted, and the current crosses zero, the thyristor will be turned off. If the forward voltage appears after the thyristor section, the forward voltage is too large, and the thyristor is not triggered in time, the thyristor may be damaged.
  • TE thyristor electronics
  • the object of the present invention is to provide a novel DC converter valve thyristor current interrupt protection realization method, the method includes: In order to ensure the normal operation of the converter valve under the current interruption of the DC transmission system, the TE design automatically re-trigger function, In the trigger interval, the thyristor forward voltage reaches + 100V, and the thyristor is automatically re-triggered, thus ensuring the safe and reliable operation of the thyristor and the system.
  • the invention relates to a novel DC commutated wide thyristor current interrupt protection method, characterized in that: in order to ensure the normal operation of the converter valve under the current interruption condition of the direct current transmission system, the thyristor electronic board TE is designed to automatically re-trigger function, in the trigger interval Inside, the thyristor forward voltage reaches 100V or more, and the thyristor is automatically re-triggered, thus ensuring safe and reliable operation of the thyristor and the system. Since the current interrupting process occurs during the operation of the converter valve, the thyristor will be turned off due to the current zero crossing. At this time, the thyristor is not in the trigger interval. To protect the thyristor from overvoltage damage, a trigger interval of the thyristor voltage is established. When the peak value of the detection voltage in the trigger interval is greater than the set current interrupt protection value, the thyristor is re-triggered.
  • the thyristor electronic board TE realizes an automatic re-triggering function by using an electronic circuit, wherein the thyristor voltage Uth is connected to a 99k resistor and a lk resistor through a 1:100 voltage dividing circuit, and the comparison threshold voltage in the circuit is The voltage dividing circuit 4k resistor and the lk resistor are divided in series, and the threshold is IV.
  • the comparison circuit When the thyristor voltage Uth is greater than 100V, the comparison circuit outputs a high level, and then performs a logical operation with the trigger interval, when in the trigger interval, and is greater than When the thyristor voltage Uth is greater than 100V, a re-trigger pulse is output, thereby triggering the thyristor to achieve the purpose of protecting the thyristor.
  • the establishment of the re-trigger interval is a trigger interval for establishing a thyristor voltage according to a trigger enable signal of the upper-layer valve-based electronic device VBE, and the base electronic device VBE sends a double-single pulse to the TE, and the width of the trigger interval is a double-single pulse Between the time, the width of the trigger interval is established based on the second pulse of the double pulse, ending at the single pulse.
  • the current interrupt protection value can be set according to the actual operation engineering and the thyristor condition, and only the resistance voltage division ratio needs to be changed in the detection circuit, that is, the threshold value of the comparison circuit can be changed, thereby changing the current interruption. Protection value.
  • the invention has the beneficial effects that: on the basis of in-depth study of the characteristics of the thyristor, the method for realizing the current interrupt protection designed by the invention has novel design method, simple implementation and high feasibility. Breaking the monopoly of technology by foreign companies, the independent research and development process of the reverse recovery protection circuit for thyristors was launched. BRIEF DESCRIPTION OF THE DRAWINGS:
  • Figure 1 shows the thyristor re-trigger schematic.
  • Figure 2 shows the re-trigger interval and voltage and current waveforms. detailed description:
  • the invention proposes a novel thyristor current intermittent re-trigger implementation method. Since the current interrupting process occurs during the operation of the converter valve, the thyristor will be turned off due to the current zero crossing, and the thyristor is no longer touched. In the transmission interval, in order to protect the thyristor from overvoltage damage, the trigger interval of the thyristor voltage is established, and the peak value of the voltage is detected in the trigger interval. If the current interrupt protection value is exceeded, the thyristor is re-triggered, thereby achieving the purpose of protecting the thyristor.
  • the principle is shown in Figure 1. In the figure, the 99k resistor and the lk resistor are connected in series to form a thyristor voltage divider circuit.
  • the lk resistor is connected in parallel with a 10nF capacitor to eliminate interference.
  • the voltage dividing signal is drawn from the lk resistor, and the voltage dividing ratio is 100: 1, that is, 100V voltage, which will generate the voltage signal of IV.
  • the 4k resistor and the lk resistor are connected in series to form a threshold comparison loop, and the threshold voltage is IV.
  • the voltage threshold comparison circuit generates a voltage comparison threshold of IV.
  • the voltage input to the opposite end of the comparison circuit can be obtained by the resistor-capacitor voltage dividing circuit, and the comparison circuit is The output is high, and the Uth can be detected by the comparison circuit.
  • the re-trigger interval is generated.
  • the re-trigger interval starts from the rising edge of the second pulse of the double pulse, ends at the falling edge of the single pulse, and is re-triggered.
  • the pulse width of the interval is the interval interval between the double pulse and the single pulse.
  • the voltage and current waveform of the re-trigger is as shown in FIG. 2, and when the voltage is greater than 100V in the re-trigger interval, The thyristor is triggered immediately, the voltage drop is zero, and the thyristor loop generates current.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Static Devices (AREA)
  • Power Conversion In General (AREA)
  • Dc-Dc Converters (AREA)

Description

一种新型直流换流阀晶闸管电流断续保护实现方法 技术领域
本发明涉及电力系统器件领域， 尤其涉及一种新型直流换流阀晶闸管电流断续保护 实现方法。 背景技术
目前国内外还没有类似的技术发明。 换流阀是直流输电的最重要的一次设备， 由于 当晶闸管电流出现断续状态时， 在电流的过零点， 晶闸管会自然关断， 这是由晶闸管的 自身特性决定的。若晶闸管关断后，又出现正向的过电压， TE此时亦不会发送触发脉冲， 晶闸管可能会因此而损坏。 为了能保证直流输电系统电流断续情况下换流阀正常工作， TE设计自动重触发功能， 在触发区间内， 晶闸管正向电压达到 + 100V, 自动重触发晶闸 管， 从而保证了晶闸管及系统的安全可靠运行。 传统的直流工程中， 换流阀都是采购国 外的设备， TE也是国外的设备， 因而对于晶闸管的电流断续重触发技术均未有较深入的 研究和探讨， 本发明在这样的背景下， 深入研究晶闸管断续重复触发的基本原理， 通过 TE开设检测窗的方式，检测正向电压的水平重触发晶闸管，具有很高的创新性和可行性。
发明专利申请 CN200720173252直流换流阀低电压参数运行试验装置中提到将低电 压大电流回路切除， 将背靠背的高压小电流回路调节至电流断续， 可以完成电流断续试 验。 该发明提供了一种换流阀电流断续的试验方法， 并没有提供换流阀的电流断续保护 的实现方法， 目前国内外还未有类似的技术发明。 本发明设计了电流断续保护的实现方 法， 具有很强的创新性， 简单方便易于实现。 发明内容
直流输电换流阀在正常运行过程中， 当晶闸管阳极和阴极的电压为正， 且晶闸管电 子设备 （TE) 发送出发脉冲时， 晶闸管正常触发。 如果晶闸管两端的电流突然断续， 出 现电流过零， 则晶闸管会关断， 如果晶闸管管段后又出现正向电压， 此正向电压过大， 不及时触发晶闸管， 则晶闸管可能会因此损坏。 本发明的目的在于， 提供一种新型直流 换流阀晶闸管电流断续保护实现方法， 该方法包括： 为了能保证直流输电系统电流断续 情况下换流阀正常工作， TE设计自动重触发功能， 在触发区间内， 晶闸管正向电压达到 + 100V, 自动重触发晶闸管， 从而保证了晶闸管及系统的安全可靠运行。 本发明的一种新型直流换流阔晶闸管电流断续保护方法， 其特征在于： 为保证直流 输电系统电流断续情况下换流阀正常工作， 晶闸管电子板 TE设计自动重触发功能， 在 触发区间内， 晶闸管正向电压达到 100V 以上， 自动重触发晶闸管， 从而保证晶闸管及 系统的安全可靠运行， 由于换流阀在运行过程中， 如果出现电流断续过程， 晶闸管会因 为电流过零而关断， 此时晶闸管己经不在触发区间内， 为保护晶闸管免受过电压损坏， 建立晶闸管电压的触发区间，在触发区间内检测电压的峰值大于所设置的电流断续保护 值， 则重触发晶闸管。
其中， 晶闸管电子板 TE是利用电子电路实现自动重触发功能， 所述电子电路为晶 闸管电压 Uth被连接到 99k电阻和 lk电阻经过 1 : 100的分压电路中， 电路中的比较阈 值电压是由分压电路 4k电阻和 lk电阻串联分压， 阈值为 IV， 则当晶闸管电压 Uth大 于 100V时， 比较电路会输出高电平， 再和触发区间进行与逻辑运算， 当在触发区间内， 且大于当晶闸管电压 Uth大于 100V， 则输出重触发脉冲， 从而触发晶闸管， 达到保护 晶闸管的目的。
其中， 所述重触发区间的建立是根据上层阀基电子设备 VBE的触发使能信号建立 晶闸管电压的触发区间，基电子设备 VBE会向 TE发送双单脉冲，触发区间的宽度即是 双单脉冲之间的时间， 触发区间的宽度是根据双脉冲的第二个脉冲建立， 在单脉冲时结 束。
其中， 所述电流断续保护值可以根据实际的运行工程和晶闸管的情况而设定， 只需 要在检测回路中改变电阻分压比， 即可以改变比较电路的阈值， 从而可以改变电流断续 的保护值。
本发明的有益效果是： 在深入研究晶闸管特性的基础上， 该发明所设计的电流断续 保护实现方法， 设计方法新颖， 实现简单易行， 具有很强的可行性。 打破由国外公司技 术垄断的局面， 展开对晶闸管的反向恢复保护电路的自主研发历程。 附图说明：
图 1示出的是晶闸管重触发原理图。
图 2示出的是重触发区间及电压电流波形图。 具体实施方式：
该发明提出了一种新颖的晶闸管电流断续重触发的实现方法， 由于换流阀在运行过 程中， 如果出现电流断续过程， 晶闸管会因为电流过零而关断， 此时晶闸管已经不在触 发区间内， 为了保护晶闸管免受过电压损坏， 建立晶闸管电压的触发区间， 在触发区间 内检测电压的峰值， 如果超出了电流断续保护值， 则重触发晶闸管， 从而达到保护晶闸 管的目的。其原理如附图 1所示，图中 99k电阻和 lk电阻串联构成晶闸管电压分压回路， lk电阻并联有 10nF电容是为了消除干扰。 其中分压信号是从 lk电阻上引出的，分压比 为 100: 1， 即 100V电压， 将产生 IV的电压信号.4k电阻和 lk电阻串联构成阈值比较 回路， 阈值电压为 IV.
首先： 电压阈值比较电路产生 IV的电压比较阈值， 当检测到晶闸管阳极和阴极的 电压 Uth大于 100V时， 经过电阻电容分压电路， 可以得到输入到比较电路反向端的电 压大于 IV， 则比较电路输出高电平， 通过该比较电路即可以实现对 Uth的检测。
其次： 由附图 2可见， 当 TE接收到双脉冲和单脉冲后产生重触发区间， 重触发区 间起始于双脉冲的第二个脉冲的上升沿， 终止于单脉冲的下降沿， 重触发区间的脉冲宽 度为双脉冲和单脉冲的区间间隔。
再次： 由附图 1可见， 当检测 Uth的电压大于 100V时， 比较电路输出为高电平， 且此时位于重触发区间内， 经过二者的与逻辑后， 产生重触发脉冲， 则可以实现在重触 发区间内检测到晶闸管阳极和阴极的电压大于 100V时， 触发晶闸管， 防止晶闸管由于 电压而损坏， 达到保护晶闸管的目的。
由上三者， 可见该发明所设计的晶闸管电流断续保护的方法能够实现应有的作用， 重触发的电压电流波形如附图 2所示， 在重触发区间内， 当电压大于 100V时， 晶闸管 立刻被触发， 电压降为零， 晶闸管回路产生电流。
以上是为了使本领域普通技术人员理解本发明， 而对本发明进行的详细描述， 但可 以想到， 在不脱离本发明的权利要求所涵盖的范围内还可以做出其它的变化和修改， 这 些变化和修改均在本发明的保护范围内。

Claims

权 利 要 求
1、 一种新型直流换流阔晶闸管电流断续保护方法， 其特征在于： 为保证直流输电 系统电流断续情况下换流阀正常工作， 晶闸管电子板 TE设计自动重触发功能， 在触发 区间内， 晶闸管正向电压达到 100V以上， 自动重触发晶闸管， 从而保证晶闸管及系统 的安全可靠运行， 由于换流阀在运行过程中， 如果出现电流断续过程， 晶闸管会因为电 流过零而关断， 此时晶闸管已经不在触发区间内， 为保护晶闸管免受过电压损坏， 建立 晶闸管电压的触发区间， 在触发区间内检测电压的峰值大于所设置的电流断续保护值， 则重触发晶闸管。
2、 如权利要求 1所述的方法， 其特征在于： 晶闸管电子板 TE是利用电子电路实现 自动重触发功能， 所述电子电路为晶闸管电压 Uth被连接到 99k电阻和 lk电阻经过 1 : 100的分压电路中， 电路中的比较阈值电压是由分压电路 4k电阻和 lk电阻串联分压， 阈值为 IV， 则当晶闸管电压 Uth大于 100V时， 比较电路会输出高电平， 再和触发区间 进行与逻辑运算， 当在触发区间内， 且大于当晶闸管电压 Uth大于 100V, 则输出重触 发脉冲， 从而触发晶闸管， 达到保护晶闸管的目的。
3、 如权利要求 1 所述的方法， 其特征在于： 所述重触发区间的建立是根据上层阀 基电子设备 VBE的触发使能信号建立晶闸管电压的触发区间， 阀基电子设备 VBE会向 TE 发送双单脉冲， 触发区间的宽度即是双单脉冲之间的时间， 触发区间的宽度是根据 双脉冲的第二个脉冲建立， 在单脉冲时结束。
4、 如权利要求 1 所述的方法， 其特征在于： 所述电流断续保护值可以根据实际的 运行工程和晶闸管的情况而设定， 只需要在检测回路中改变电阻分压比， 即可以改变比 较电路的阈值， 从而可以改变电流断续的保护值。
PCT/CN2011/001003 2010-09-20 2011-06-16 一种新型直流换流阀晶闸管电流断续保护实现方法 WO2012037770A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/255,500 US20120194957A1 (en) 2010-09-20 2011-06-16 Anovel Protection Method Of Direct Currrent Converter Valve Thyristor In Discontinuous Current Mode

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010288383.9A CN101958638B (zh) 2010-09-20 2010-09-20 一种直流换流阀晶闸管电流断续保护实现方法
CN201010288383.9 2010-09-20

Publications (1)

Publication Number Publication Date
WO2012037770A1 true WO2012037770A1 (zh) 2012-03-29

Family

ID=43485799

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/001003 WO2012037770A1 (zh) 2010-09-20 2011-06-16 一种新型直流换流阀晶闸管电流断续保护实现方法

Country Status (3)

Country Link
US (1) US20120194957A1 (zh)
CN (1) CN101958638B (zh)
WO (1) WO2012037770A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112415354A (zh) * 2020-10-15 2021-02-26 许继集团有限公司 一种交流耗能换流阀晶闸管级单元检测方法
CN115219872A (zh) * 2022-07-18 2022-10-21 中国南方电网有限责任公司超高压输电公司广州局 晶闸管电压检测电路及其方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101958638B (zh) * 2010-09-20 2014-07-02 中国电力科学研究院 一种直流换流阀晶闸管电流断续保护实现方法
KR101813262B1 (ko) 2011-05-17 2018-01-02 삼성전자주식회사 히스테리시스를 사용하여 과전압, 과전류 및 과온도로부터 무선-커플된 전력 장치들을 보호하는 장치 및 방법
CN102594098B (zh) * 2012-03-23 2014-10-08 河海大学常州校区 节能型脉冲触发式晶闸管驱动电路
CN105703481B (zh) * 2016-03-03 2018-03-30 南京南瑞继保电气有限公司 一种换流阀均压状态一致性统计方法
CN109239564B (zh) * 2017-07-10 2021-02-26 南京南瑞继保电气有限公司 一种基于软件逻辑功能配合的晶闸管测试系统
CN109149914A (zh) * 2018-07-09 2019-01-04 南方电网科学研究院有限责任公司 一种阀基电子设备的补发脉冲方法
CN112615356A (zh) * 2020-12-04 2021-04-06 西安西电电力系统有限公司 一种高压直流输电用光控晶闸管反向恢复期保护板卡
CN112713755B (zh) * 2020-12-04 2022-04-19 北京星航机电装备有限公司 一种双向晶闸管快速关断方法及系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115387A (en) * 1990-08-14 1992-05-19 Polyspede Electronics Corporation Circuitry and method of protecting thyristors
US5155673A (en) * 1990-05-14 1992-10-13 Kabushiki Kaisha Toshiba Thyristor converter protection method and apparatus
CN1688107A (zh) * 2005-04-20 2005-10-26 中国电力科学研究院 一种静止型无功功率补偿器的晶闸管阀光电触发板
CN101958638A (zh) * 2010-09-20 2011-01-26 中国电力科学研究院 一种新型直流换流阀晶闸管电流断续保护实现方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2447976Y (zh) * 2000-04-19 2001-09-12 徐晓亮 可控硅并联逆变中频电源的防过压触发电路
CN201349190Y (zh) * 2008-12-10 2009-11-18 哈尔滨九洲电气股份有限公司 一种用于电机软起动器的可控硅触发装置
CN201383762Y (zh) * 2009-04-13 2010-01-13 中国西电电气股份有限公司 一种高压直流输电晶闸管换流阀运行试验用电流源

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5155673A (en) * 1990-05-14 1992-10-13 Kabushiki Kaisha Toshiba Thyristor converter protection method and apparatus
US5115387A (en) * 1990-08-14 1992-05-19 Polyspede Electronics Corporation Circuitry and method of protecting thyristors
CN1688107A (zh) * 2005-04-20 2005-10-26 中国电力科学研究院 一种静止型无功功率补偿器的晶闸管阀光电触发板
CN101958638A (zh) * 2010-09-20 2011-01-26 中国电力科学研究院 一种新型直流换流阀晶闸管电流断续保护实现方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112415354A (zh) * 2020-10-15 2021-02-26 许继集团有限公司 一种交流耗能换流阀晶闸管级单元检测方法
CN112415354B (zh) * 2020-10-15 2023-08-15 许继集团有限公司 一种交流耗能换流阀晶闸管级单元检测方法
CN115219872A (zh) * 2022-07-18 2022-10-21 中国南方电网有限责任公司超高压输电公司广州局 晶闸管电压检测电路及其方法
CN115219872B (zh) * 2022-07-18 2024-04-02 中国南方电网有限责任公司超高压输电公司广州局 晶闸管电压检测电路及其方法

Also Published As

Publication number Publication date
CN101958638A (zh) 2011-01-26
US20120194957A1 (en) 2012-08-02
CN101958638B (zh) 2014-07-02

Similar Documents

Publication Publication Date Title
WO2012037770A1 (zh) 一种新型直流换流阀晶闸管电流断续保护实现方法
TWI472154B (zh) 功率開關串聯電路及其控制方法
CN104052048A (zh) 一种igbt驱动的有源钳位电路
CN103199832B (zh) Igbt驱动保护电路及系统
CN104539141B (zh) 开关电源双脉冲脉宽限制电路及其实现方法
CN102684652B (zh) 防mcu或驱动ic故障的同步脉冲控制电路
CN110568335A (zh) 一种无检测盲区的SiC MOSFET短路检测保护系统和方法
CN102361319B (zh) 基于驱动芯片的igbt短路保护检测电路
CN102097789B (zh) 一种igbt过流或短路状态检测电路
CN107634504B (zh) 功率因数校正pfc电路的保护控制装置、保护控制器
CN104466912A (zh) 一种具有短路保护的线性稳压器
TWI459673B (zh) 功率開關串聯電路及其控制方法以及多電平變換裝置
CN203312794U (zh) 三线制浪涌保护电路
RU2459333C1 (ru) Устройство защиты оборудования от импульсных перенапряжений
CN103915993A (zh) 过压保护触发电路、过压保护装置和机车辅助变流器
CN204068233U (zh) 一种igbt驱动的有源钳位电路
CN110579640B (zh) 一种用于低压电力台区的电流信号发送电路
CN101752831B (zh) 电气开关装置及其漏电保护器
CN209282814U (zh) 可控硅的保护及软启动电路
CN204167902U (zh) 高安全浪涌保护器
CN103326344A (zh) 一种过压限制电路
CN205453654U (zh) 一种开关管过压保护电路
CN214280940U (zh) Pse芯片浪涌防护电路结构
CN205945040U (zh) 一种快速自驱动过压保护电路
CN207490503U (zh) 一种配电终端多路遥信保护电路

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 13255500

Country of ref document: US

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

Ref document number: 11826297

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 27.08.2013)

122 Ep: pct application non-entry in european phase

Ref document number: 11826297

Country of ref document: EP

Kind code of ref document: A1