WO2011085517A1 - 全自励源电子式电流互感器 - Google Patents
全自励源电子式电流互感器 Download PDFInfo
- Publication number
- WO2011085517A1 WO2011085517A1 PCT/CN2010/000061 CN2010000061W WO2011085517A1 WO 2011085517 A1 WO2011085517 A1 WO 2011085517A1 CN 2010000061 W CN2010000061 W CN 2010000061W WO 2011085517 A1 WO2011085517 A1 WO 2011085517A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- energy
- circuit
- output
- resistor
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
Definitions
- the invention belongs to the field of electric power measurement, and particularly relates to an electronic current transformer. ⁇ Background technique ⁇
- the disadvantages are: 1 The life cycle of the laser source is short, only 8000-10000 hours; 2 expensive, about 12,000 ⁇ , accounting for more than half of the cost of the 1 1 Okv transformer; 3 laser requires high environmental conditions, so on-site operation and maintenance High difficulty. For this reason, the developer hopes to obtain energy directly from the high-voltage busbar magnetic field to be tested by means of electromagnetic induction, as a high-voltage side power source.
- the object of the present invention is to overcome the shortcomings of the existing self-excited source technology, and to provide a fully self-excited electronic current transformer that does not require an external power source at any time, and can replace laser or other types of external energy transmission methods.
- the product is to overcome the shortcomings of the existing self-excited source technology, and to provide a fully self-excited electronic current transformer that does not require an external power source at any time, and can replace laser or other types of external energy transmission methods.
- a self-excited source electronic current transformer comprising a power-carrying winding, a fast voltage-stabilizing circuit and an A/D conversion circuit, the output of the energy-carrying winding is connected to an input of a voltage-stabilizing circuit, and the output of the voltage-stabilizing circuit is used as an A/D conversion
- the working power supply is characterized in that: the energy-carrying winding is composed of two energy-taking branches, wherein the output wave of one energy-receiving branch is 60-90° ahead of the output wave of one energy-receiving branch.
- the output waves of the two energy-receiving branches are combined and input to the voltage stabilizing circuit, and the second-order nonlinear filtering technology is adopted.
- the filtering and energy storage can be quickly obtained, and the regulated output can be quickly obtained.
- the full self-excited source electronic current transformer provided by the invention uses two branches to take energy, respectively, directly obtains energy from the magnetic field of the busbar to be tested, and synthesizes two output waveforms to fill the valleys and reduce DC ripple.
- the valley voltage of the composite wave is higher than the required DC voltage regulation value, and directly meets the input requirement of the voltage regulator module in the voltage regulator circuit.
- the nonlinear filter energy storage circuit overcomes the shortcoming of the general linear filter voltage rise, so that it can be quickly started.
- FIG. 1 is a circuit schematic diagram of a fully self-excited source electronic current transformer according to an embodiment
- FIG. 2 is an output waveform of the energizing coil Q1 and an output waveform diagram of the split phase rectification
- 3 is an output waveform of the energizing coil Q2 and a rectified output waveform thereof
- FIG. 4 is a waveform diagram of the output waveforms of the first and second energizing branches.
- the fully self-excited source electronic current transformer provided in this embodiment includes: a power take-off winding 1, a voltage stabilizing circuit 2 and an A/D conversion circuit 3, and an output connection voltage stabilizing circuit 2 of the power take-off winding 1
- the input of the voltage stabilizing circuit 2 is connected to the control terminal of the A/D converter circuit 3.
- the energy-carrying winding 1 includes a first energy-receiving branch and a second energy-receiving branch, and the first energy-receiving branch includes a power-carrying line ⁇ Q1, a choke coil L1, a diode D1, a diode D2, a capacitor Cl, and a bridge rectifier circuit. D3- 6;
- the energizing coil Q1 obtains energy from the alternating magnetic field of the power line, and the bridge rectifier circuit D3-6 rectifies the energy obtained by the energizing coil Q1 from the alternating magnetic field of the power line, and the capacitor C1 is connected in series with the energizing line ⁇ Q1.
- the diodes D1 and D2 are opposite to each other and are connected in parallel with the capacitor C1.
- the choke line 1L1 is connected in series to the output end of the energizing coil Q1 and before the bridge rectifier circuit D3-6.
- the second energy-receiving branch includes an energy-carrying line ⁇ Q2, a turbulent line ⁇ L2, and a bridge rectifier circuit D7-10; the energy-carrying coil Q2 obtains energy from the alternating magnetic field of the power line, and the bridge rectifier circuit D7-10 takes the energy-carrying coil Q2 is the energy rectified output drawn from the alternating magnetic field of the power line, and the choke coil L2 is connected in series to the output end of the energizing coil Q2 and before the bridge rectifier circuit D7-10.
- the energizing wires ⁇ Ql and Q2 are all made of iron-based microcrystalline core ring. Specifically, the inner diameter of 60mm, the outer diameter of 80mm, the thickness of 20mm, and the ⁇ 0,5mm enameled wire are evenly wound around the magnetic core ring. When the coil is energized, the power line passes through the center of the ring during installation. If more than one turns back and forth, the energy-receiving effect is proportional to the number of passes.
- the choke coils L1 and L2 are made of ordinary cold-rolled silicon steel sheets with a ring around the ring as the core.
- Capacitor C1 uses a 20uf/50V capacitor.
- the energizing coils Q1 and Q2 are respectively used to obtain energy from the alternating magnetic field of the power line; the bridge rectifier circuit D3-6 and the bridge rectifier circuit D3-6 respectively alternate the energizing coils Q1 and Q2 from the power line.
- the energy obtained by the magnetic field is rectified, and then the output is combined; the diodes D1 and D2 connected in parallel with the capacitor C1 are used for bypassing overvoltage; the capacitor C1 provided in the first energy-receiving branch is used for the forward phase shift, thereby making the first energy-capacity branch
- the path forms a split-phase rectified output, while the second energy-receiving branch uses a positive-phase rectified output.
- the output waveform of the first energy-receiving branch is advanced by 90 compared with the phase of the output waveform of the second energy-receiving branch.
- the voltage stabilizing circuit 2 includes a nonlinear filter energy storage unit a (barrel unit a), a nonlinear filter energy storage unit b (abbreviated as unit b), a voltage stabilizing module M1, a capacitor C4, and a capacitor C5.
- the unit a & includes a resistor R1, a Zener diode W1, a resistor R2, a transistor T1, a transistor ⁇ 2, a diode D11 and a capacitor C2.
- the resistor R1 is connected to the input end of the voltage stabilizing circuit 2, and the other end is connected to the negative terminal of the Zener diode W1.
- the Zener diode W1 is connected to the resistor R2, the other end of the resistor R2 is grounded, the transistor T1 and the transistor 2 constitute the Darlington switch, the base of the transistor T1 is connected to the node of the Zener diode W1 and the resistor R2, and the collector of the transistor T1 and the transistor 2 is connected.
- the other end of the capacitor C2 is connected to the input end of the voltage stabilizing circuit 2, the positive pole of the diode D11 is connected to the emitter of the triode ⁇ 2, and the cathode of the negative pole is connected to the collector of the triode ⁇ 2.
- the unit b includes a resistor R3, a Zener diode W2, a resistor R4, a transistor T3, a transistor 4, a diode D12 and a capacitor C3.
- the resistor R3 is connected to the input terminal of the voltage regulator circuit 2, and the other end is connected to the cathode of the Zener diode W2.
- the positive electrode of the voltage diode W2 is connected to the resistor R4, the other end of the resistor R4 is grounded, the triode ⁇ 3 and the triode ⁇ 4 form a Darlington switch, the triode ⁇ 3 base is connected to the node of the Zener diode W2 and the resistor R4, and the collector capacitor of the triode ⁇ 3 and the triode ⁇ 4 C3-end, the other end of the capacitor C3 is connected to the input end of the voltage stabilizing circuit 2, the positive pole of the diode D12 is connected to the emitter of the triode ⁇ 4, and the cathode of the negative pole is connected to the collector of the triode ⁇ 4.
- the input terminal of the voltage regulator module M1 is connected to the input end of the voltage stabilizing circuit 2, and the output end is connected to the control end of the A/D conversion circuit 3.
- the output end of the voltage stabilizing module M1 is grounded through a capacitor C4 and a capacitor C5, respectively.
- the Zener diode W1 selects a 3.8V Zener diode
- the Zener diode W2 selects a 5.2V Zener diode
- the voltage regulator module Ml selects the low dropout voltage regulator module, for example, the input voltage is 5-40 V, and the output voltage is 5V.
- C2 takes 47uF
- C3 takes 0.47F
- C4 takes 10uf
- C5 takes 0.1uf.
- Transistors Tl, T2 and T3, T4 use C8050 triode.
- the A/D conversion circuit 3 includes a current sensor M2 and an A/D conversion module M3, which is responsible for continuously converting the current value on the primary conductor into a digital signal, and its control terminal is connected to the output terminal of the voltage regulation module M1.
- the current sensor M2 can be selected from Rogowski coil or LPCT (low power core coil current sensor), S l, S2 output 0 2.5Vac voltage value,
- a / D conversion module M3 uses 16-bit A / D chip and microprocessor chip , A/D conversion and communication programming according to the protocol specified in the IEC60044-8-2002 standard.
- the starting and working process of the whole self-excited electronic current transformer is: After one closing, the magnetic field energy of the primary current is obtained by the energizing winding 1; the voltage is stabilized by the voltage stabilizing circuit 2 and the stable voltage is output; The A/D conversion circuit 3 is powered on immediately after receiving the power supply, continuously performs A/D conversion of the current value under the control of the microprocessor, and directly outputs the digital signal through the Do port, or outputs the optical fiber number through the E/0 conversion. signal.
- the full self-excited source electronic current transformer provided by the above embodiment adopts double coil energizing, which can compensate for the delay drawback of the single coil energizing.
- the single coil Since the single coil is rectified and outputted as a pulsating waveform whose trough voltage is lower than the minimum regulated value required by the working circuit (see Figures 2 and 3), it must generally be obtained by capacitive filtering. Regulated output, capacitor filtering will produce a large output waveform delay, which will lead to extended wake-up time of the transformer.
- the application of this measure can shorten the wake-up time of the transformer from 50-100mS to 2-5mS, which meets the grid relay protection. Claim.
- the main idea of the present invention is to superimpose the output waves by mutually forming the two energy-receiving branches of the phase difference to reduce the DC pulsation, so that the valley voltage of the composite wave is higher than the required DC.
- the regulation value directly meets the input requirements of the voltage regulator module in the voltage regulator circuit, so that the A/D conversion circuit can be quickly started. Therefore, the phase difference is not limited to the first energy-receiving branch leading the second energy-receiving branch by 90°, and within a certain range, it can be verified, 60-90.
- the phase difference has a significant effect.
- the nonlinear filter energy storage unit a and the nonlinear filter energy storage unit b can implement other structures under the premise of realizing the same function, and the thresholds K1 and ⁇ 2 can be used therein. It varies depending on the occasion.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dc-Dc Converters (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
- Rectifiers (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10842801A EP2525472A1 (en) | 2010-01-13 | 2010-01-13 | Electronic current transformer based on complete self-excitation power supply |
JP2012529087A JP5529278B2 (ja) | 2010-01-13 | 2010-01-13 | 全自励式電源の電子式変流器 |
US13/391,822 US8587971B2 (en) | 2010-01-13 | 2010-01-13 | Electronic current transformer based on complete self-excitation power supply |
PCT/CN2010/000061 WO2011085517A1 (zh) | 2010-01-13 | 2010-01-13 | 全自励源电子式电流互感器 |
CA2770372A CA2770372C (en) | 2010-01-13 | 2010-01-13 | An electronic current transformer based on complete self-excitation power supply |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2010/000061 WO2011085517A1 (zh) | 2010-01-13 | 2010-01-13 | 全自励源电子式电流互感器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011085517A1 true WO2011085517A1 (zh) | 2011-07-21 |
Family
ID=44303784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2010/000061 WO2011085517A1 (zh) | 2010-01-13 | 2010-01-13 | 全自励源电子式电流互感器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8587971B2 (zh) |
EP (1) | EP2525472A1 (zh) |
JP (1) | JP5529278B2 (zh) |
CA (1) | CA2770372C (zh) |
WO (1) | WO2011085517A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106530916A (zh) * | 2016-11-16 | 2017-03-22 | 商洛学院 | 一种磁电转换装置 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104237687B (zh) * | 2014-09-12 | 2016-10-05 | 华中科技大学 | 有源电子式互感器的供能激光器老化寿命在线监测方法 |
CN106707008A (zh) * | 2016-12-27 | 2017-05-24 | 成都信息工程大学 | 一种电子式电流互感器及其工作方法 |
US10732206B2 (en) * | 2018-04-02 | 2020-08-04 | Abb Schweiz Ag | Current sensor and method of assembly |
CN109302071B (zh) * | 2018-10-18 | 2021-01-12 | 南京航空航天大学 | 一种全波有源整流型llc谐振变换器及其控制策略 |
CN110212594B (zh) * | 2019-06-19 | 2024-05-03 | 国网安徽省电力有限公司芜湖供电公司 | 一种线路ct能量采集和储能电源 |
CN111884188A (zh) * | 2020-08-28 | 2020-11-03 | 北京同时开关技术有限公司 | 开关驱动电路和开关设备 |
CN114189164B (zh) * | 2021-12-08 | 2023-10-27 | 浙江华章科技有限公司 | 一种流浆箱阀门清洗控制系统 |
CN116027144A (zh) * | 2022-11-15 | 2023-04-28 | 云南电网有限责任公司电力科学研究院 | 一种自取能电力监测装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4156176A (en) * | 1977-06-30 | 1979-05-22 | Electric Power Research Institute, Inc. | Voltage regulator utilizing a static var generator |
JPS55128157A (en) * | 1979-03-27 | 1980-10-03 | Tohoku Electric Power Co Inc | Portable current-voltage transformer |
CN2450672Y (zh) * | 2000-10-12 | 2001-09-26 | 大连现代高技术发展有限公司 | 测功率装置 |
CN2612042Y (zh) * | 2003-03-11 | 2004-04-14 | 广州市伟钰光电科技有限公司 | 有源光电电流互感器 |
CN100362727C (zh) * | 2005-08-05 | 2008-01-16 | 西安华伟光电技术有限公司 | 从电力线磁场获取能量的自励电源装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3921069A (en) * | 1974-11-06 | 1975-11-18 | Gen Electric | Variable gain electronic current transformer |
JPS58182476A (ja) * | 1982-04-15 | 1983-10-25 | Matsushita Electric Works Ltd | 整流装置 |
US4879661A (en) * | 1987-10-02 | 1989-11-07 | International Business Machines Corporation | Bi-directional circuit to interface between a low current device and high current tester |
JP3594049B2 (ja) * | 1995-11-13 | 2004-11-24 | 株式会社安川電機 | 整流回路 |
JP4258119B2 (ja) * | 2000-10-27 | 2009-04-30 | 富士電機システムズ株式会社 | 電流計測装置 |
KR20030081476A (ko) * | 2001-03-05 | 2003-10-17 | 소니 가부시끼 가이샤 | 스위칭 소자에 의해 구동주파수를 가변제어한 스위칭전원회로 |
JP3627708B2 (ja) * | 2002-01-25 | 2005-03-09 | 株式会社村田製作所 | スイッチング電源装置 |
JP3733440B2 (ja) * | 2003-03-25 | 2006-01-11 | オリオン電機株式会社 | スイッチング電源 |
JP4238871B2 (ja) * | 2004-01-30 | 2009-03-18 | 株式会社村田製作所 | スイッチング電源装置 |
TW200820829A (en) * | 2006-10-16 | 2008-05-01 | Delta Electronics Inc | Self-excitation system |
JP2008172985A (ja) * | 2007-01-06 | 2008-07-24 | Suezo Kudo | 低リップル整流回路 |
US7499294B2 (en) * | 2007-02-12 | 2009-03-03 | Spi Electronic Co., Ltd. | Self-excitation synchronous rectification driver |
JP4492651B2 (ja) * | 2007-07-26 | 2010-06-30 | ブラザー工業株式会社 | フィードバック制御装置 |
-
2010
- 2010-01-13 JP JP2012529087A patent/JP5529278B2/ja not_active Expired - Fee Related
- 2010-01-13 CA CA2770372A patent/CA2770372C/en not_active Expired - Fee Related
- 2010-01-13 EP EP10842801A patent/EP2525472A1/en not_active Withdrawn
- 2010-01-13 WO PCT/CN2010/000061 patent/WO2011085517A1/zh active Application Filing
- 2010-01-13 US US13/391,822 patent/US8587971B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4156176A (en) * | 1977-06-30 | 1979-05-22 | Electric Power Research Institute, Inc. | Voltage regulator utilizing a static var generator |
JPS55128157A (en) * | 1979-03-27 | 1980-10-03 | Tohoku Electric Power Co Inc | Portable current-voltage transformer |
CN2450672Y (zh) * | 2000-10-12 | 2001-09-26 | 大连现代高技术发展有限公司 | 测功率装置 |
CN2612042Y (zh) * | 2003-03-11 | 2004-04-14 | 广州市伟钰光电科技有限公司 | 有源光电电流互感器 |
CN100362727C (zh) * | 2005-08-05 | 2008-01-16 | 西安华伟光电技术有限公司 | 从电力线磁场获取能量的自励电源装置 |
Non-Patent Citations (1)
Title |
---|
LIU, ZHONGZHAN ET AL.: "The key technology ofECT with self-excitation power supply", AUTOMATION OF ELECTRIC POWER SYSTEMS, vol. 33, no. 6, 25 March 2009 (2009-03-25), pages 67 - 69, XP008150574 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106530916A (zh) * | 2016-11-16 | 2017-03-22 | 商洛学院 | 一种磁电转换装置 |
CN106530916B (zh) * | 2016-11-16 | 2023-10-20 | 商洛学院 | 一种磁电转换装置 |
Also Published As
Publication number | Publication date |
---|---|
JP5529278B2 (ja) | 2014-06-25 |
US8587971B2 (en) | 2013-11-19 |
JP2013505689A (ja) | 2013-02-14 |
EP2525472A1 (en) | 2012-11-21 |
CA2770372A1 (en) | 2011-07-21 |
US20120153931A1 (en) | 2012-06-21 |
CA2770372C (en) | 2015-02-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2011085517A1 (zh) | 全自励源电子式电流互感器 | |
CN105680694B (zh) | 用于开关模式电源的系统和方法 | |
CN102904449B (zh) | 提供功率转换器缆线补偿的调整电路 | |
CN103477233B (zh) | 一种电流检测电路及其控制电路和电源转换电路 | |
CN203562832U (zh) | 多供电模块无缝切换的电源 | |
CN104578790A (zh) | 一种应用于原边反馈反激变换器的数字信号采样电路及其控制方法 | |
CN103840670A (zh) | 一种节能型高频开关电源 | |
CN102957324A (zh) | 电源检测电路 | |
US7522437B2 (en) | Inverter circuit and control circuit thereof | |
CN106451793A (zh) | 基于数字电压信号的智能变电站断路器选相控制方法 | |
CN205319941U (zh) | 双路电压转换控制芯片、双路电压转换器和电子式电能表 | |
CN102122891A (zh) | 变压器漏感能量的吸收回馈电路 | |
CN102386780A (zh) | 一种dc/dc部分的推挽电路 | |
CN204008785U (zh) | 计量回路故障监测系统 | |
CN104601015A (zh) | 反激式ac-dc转换器 | |
CN202931197U (zh) | 一种基于变压器变换的反激式变换器 | |
CN209046532U (zh) | 一种单脉宽调制器多路隔离输出电路 | |
US10367408B2 (en) | Electromagnetic compatibility filter with an integrated power line communication interface | |
CN102231573B (zh) | 一种适应于小电流在线取电供能电源 | |
CN202018474U (zh) | 一种电流采样电路及具有该电路的电源 | |
KR20090102948A (ko) | 다중출력 직류/직류 컨버터 | |
CN204481696U (zh) | 一种电力采集系统的供电电路 | |
CN209375470U (zh) | 一种平衡调制开关稳压电源 | |
CN105301351A (zh) | 一种用电信息采集系统模组化终端的电源交采模块 | |
CN207720021U (zh) | 一种基于uc3842的开关电源保护电路 |
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: 10842801 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 240/MUMNP/2012 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010842801 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2770372 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13391822 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012529087 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |