WO2014117616A1 - Power transmission line single phase ground fault full component voltage protection method - Google Patents
Power transmission line single phase ground fault full component voltage protection method Download PDFInfo
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- WO2014117616A1 WO2014117616A1 PCT/CN2013/090857 CN2013090857W WO2014117616A1 WO 2014117616 A1 WO2014117616 A1 WO 2014117616A1 CN 2013090857 W CN2013090857 W CN 2013090857W WO 2014117616 A1 WO2014117616 A1 WO 2014117616A1
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- Prior art keywords
- protection
- fault
- transmission line
- phase
- ground fault
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 abstract description 5
- 230000007704 transition Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
Definitions
- the invention relates to the technical field of power system relay protection, in particular to a full-phase voltage protection method for single-phase ground fault of a transmission line. Background technique
- Transmission line distance protection can be divided into line distance protection based on sudden change and line distance protection based on full component according to different electrical quantities.
- Line distance protection based on sudden change is affected by system operation mode and strong resistance to transition resistance. This type of protection action has high reliability.
- the line distance protection based on the sudden change For a line fault after two cycles, it cannot provide relay protection, and it cannot be applied to the protection of the entire fault process of the line.
- the full-component line distance protection can be applied to the protection of the entire fault process of the line, the self-protection algorithm is seriously affected by the transition resistance. In the case of high-resistance ground fault, protection against jeopardy or misoperation is easy, and the protection reliability is not high. .
- the object of the present invention is to overcome the deficiencies of the prior art and provide a full-component voltage protection method for a single-phase ground fault of a transmission line.
- a full-phase voltage protection method for single-phase ground fault of transmission line the steps are as follows:
- ⁇ is the fault phase current; is the fault phase negative sequence current; / ⁇ zero sequence current; ⁇ B, C phase; is the phase angle of the fault phase negative sequence current; They are the positive sequence and zero sequence impedance of the transmission line per unit length.
- the present invention has the following advantages over the prior art:
- the voltage drop amplitude along the line from the protection line protection installation to the single-phase ground fault point is smaller than the voltage drop amplitude from the protection installation to the protection setting range;
- the voltage drop amplitude along the line from the protection line installation to the single-phase ground fault point is greater than the voltage drop amplitude from the protection installation to the protection setting range, to achieve full-phase voltage protection of the single-phase ground fault of the transmission line, and the performance It is not affected by the system operation mode and load current, and eliminates the influence of the transition resistance on the protection action performance. It is suitable for the protection of the entire fault process of the single-phase ground fault of the transmission line.
- FIG. 1 is a schematic diagram of a line transmission system to which the present invention is applied. detailed description
- ⁇ - ⁇ is z o ⁇ The real part of z i L f .
- Distribution characteristics of voltage drop along the transmission line after single-phase ground fault When the fault occurs in the protection zone, the voltage drop amplitude along the line from the protection line installation point to the single-phase ground fault point is less than the voltage drop range from the protection installation to the protection setting range. Value; When the protection outside the protection zone occurs, the voltage drop amplitude along the line from the protection line installation to the single-phase ground fault point is greater than the voltage drop amplitude from the protection installation to the protection setting range. Therefore, the method of the invention is guaranteed If ⁇ ( ⁇ )] 2 + [ ⁇ )] 2 ⁇
- 0 is the protection setting range; , Z. They are the positive sequence and zero sequence impedance of the transmission line per unit length.
- the method of the invention utilizes the voltage drop distribution characteristic along the line (ie, the voltage drop amplitude along the line from the transmission line protection installation to the single-phase ground fault point is smaller than the voltage drop amplitude from the protection installation to the protection setting range when the fault occurs in the protection zone; In the case of an out-of-zone fault, the amplitude of the voltage drop along the transmission line protection installation to the single-phase ground fault point is greater than the voltage drop amplitude from the protection installation to the protection setting range.)
- the full-voltage protection of the single-phase ground fault of the transmission line is realized. The performance is not affected by the system operation mode and load current, and the effect of the transition resistance on the protection action performance is eliminated. It is suitable for the protection of the entire fault process of the single-phase ground fault of the transmission line.
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Disclosed is a power transmission line single phase ground fault full component voltage protection method. The method of the present invention utilizes the characteristic of voltage drops along a line (that is, when a fault is found in a protected area, the magnitude of voltage drops along the line from where a power transmission line protection is installed to a single phase fault point is less than the magnitude of voltage drops from where the protection is installed to a protection tuning range; when a fault is found outside of the protected area, the magnitude of voltage drops along the line from where the power transmission line protection is installed to the single phase ground fault point is greater than the magnitude of voltage drops from where the protection is installed to the protection tuning range) to implement power transmission line single phase ground fault full component voltage protection, allows for action performance not only to be unaffected by a system operation scheme and a load current, but also to eliminate an impact of a transition resistance on a protection action performance, and is applicable in protection of a power transmission line single phase ground fault for an entire fault process.
Description
一种输电线路单相接地故障全分量电压保护方法 技术领域 Single-phase ground fault full-component voltage protection method for transmission line
本发明涉及电力***继电保护技术领域， 特别是一种输电线路单相接地故障全分量电压保护方法。 背景技术 The invention relates to the technical field of power system relay protection, in particular to a full-phase voltage protection method for single-phase ground fault of a transmission line. Background technique
输电线路距离保护根据采用电气量不同可分为基于突变量的线路距离保护和基于全分量的线路距离 保护两类。 基于突变量的线路距离保护受***运行方式影响小和抗过渡电阻能力强， 此类保护动作性能可 靠性高， 但由于电气突变量只在故障后两周波内存在， 基于突变量的线路距离保护对于两周波后的线路故 障无法起到继电保护作用， 无法适用于线路整个故障过程的保护。 基于全分量的线路距离保护虽可适用于 线路整个故障过程的保护， 但由于自身保护算法受过渡电阻的影响严重， 在高阻接地故障时容易发生保护 拒动或误动， 保护可靠性不高。 Transmission line distance protection can be divided into line distance protection based on sudden change and line distance protection based on full component according to different electrical quantities. Line distance protection based on sudden change is affected by system operation mode and strong resistance to transition resistance. This type of protection action has high reliability. However, since the electrical sudden change is only present after two cycles of failure, the line distance protection based on the sudden change For a line fault after two cycles, it cannot provide relay protection, and it cannot be applied to the protection of the entire fault process of the line. Although the full-component line distance protection can be applied to the protection of the entire fault process of the line, the self-protection algorithm is seriously affected by the transition resistance. In the case of high-resistance ground fault, protection against jeopardy or misoperation is easy, and the protection reliability is not high. .
发明内容 Summary of the invention
本发明的目的在于克服已有技术存在的不足， 提供一种输电线路单相接地故障全分量电压保护方法。 一种输电线路单相接地故障全分量电压保护方法， 其步骤如下： The object of the present invention is to overcome the deficiencies of the prior art and provide a full-component voltage protection method for a single-phase ground fault of a transmission line. A full-phase voltage protection method for single-phase ground fault of transmission line, the steps are as follows:
( 1 )测量输电线路保护安装处的故障相电压 ύφ、故障相电流 ϊψ、故障相负序电流 ϊφι和零序电流 i0 其中， 0 =A、 B、 C相。 (1) Measure the fault phase voltage ύ φ , fault phase current ϊψ, fault phase negative sequence current ϊ φ ι and zero sequence current i 0 of the transmission line protection installation, where 0 = A, B, C phase.
(2 ) 计算输电线路保护安装处到单相接地故障点的电压降 Δί^的实部 Re(At^)和虚部 Im(At^) ： (2) Calculate the real voltage Re(At^) and imaginary part Im(At^) of the voltage drop Δί^ of the transmission line protection installation to the single-phase ground fault point:
(3 ) 比较保护判据 < \xsetzjset\是否成立， 若成立， 则保护动作； 其中，
/ Xiei为保护整定范围 (3) The comparison protection criterion < \x set zj set \ is established, if it is established, the protection action; / X iei to protect the tuning range
+ +
综上所述， 本发明相比现有技术具有如下优点： In summary, the present invention has the following advantages over the prior art:
z z
o o
本发明方法利用沿线电压降落分布特性即保护区内故障时， 输电线路保护安装处到单相接地故障点的 沿线电压降落幅值小于保护安装处到保护整定范围处的电压降落幅值； 保护区外故障时， 输电线路保护安 装处到单相接地故障点的沿线电压降落幅值大于保护安装处到保护整定范围处的电压降落幅值， 实现输电 线路单相接地故障全分量电压保护， 动作性能既不受***运行方式和负荷电流的影响， 又消除了过渡电阻 对保护动作性能的影响， 适用于输电线路单相接地故障的整个故障过程的保护。 附图说明 When the method of the invention utilizes the voltage drop distribution characteristic along the line, that is, the fault in the protection zone, the voltage drop amplitude along the line from the protection line protection installation to the single-phase ground fault point is smaller than the voltage drop amplitude from the protection installation to the protection setting range; In the case of external fault, the voltage drop amplitude along the line from the protection line installation to the single-phase ground fault point is greater than the voltage drop amplitude from the protection installation to the protection setting range, to achieve full-phase voltage protection of the single-phase ground fault of the transmission line, and the performance It is not affected by the system operation mode and load current, and eliminates the influence of the transition resistance on the protection action performance. It is suitable for the protection of the entire fault process of the single-phase ground fault of the transmission line. DRAWINGS
图 1为应用本发明的线路输电***示意图。 具体实施方式 1 is a schematic diagram of a line transmission system to which the present invention is applied. detailed description
下面结合说明书附图对本发明的技术方案做进一步详细表述。 The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.
保护装置测量输电线路保护安装处的故障相电压 ύφ、 故障相电流 ϊφ、 故障相负序电流 ϊφ1和零序电 流 /θ ; 其中， φ = 、 B、 C相。 计算输电线路保护安装处到单相接地故障点的电压降 At^的实部 Re(At^) The protection device measures the fault phase voltage ύ φ , the fault phase current ϊ φ , the fault phase negative sequence current ϊ φ1 and the zero sequence current / θ of the transmission line protection installation; wherein, φ = , B, C phase. Calculate the real part Re(At^) of the voltage drop At^ of the transmission line protection installation to the single-phase ground fault point
ζι -Ό 为
zo― zi L f 的实部。 输电线路发生单相接地故障后沿线电压降落分布特点： 保护区内故障时， 输电线路保护安装处到单相 接地故障点的沿线电压降落幅值小于保护安装处到保护整定范围处的电压降落幅值； 保护区外故障时， 输 电线路保护安装处到单相接地故障点的沿线电压降落幅值大于保护安装处到保护整定范围处的电压降落 幅值。 因此， 得到本发明方法的保
若 ^^(Δ^)]2 + [ Δ^)]2 < |xieiZl/iei |成立， 则保护动作。其中， ϊίβΓϊφ ζ1— z0 j Ζι -Ό is z o― The real part of z i L f . Distribution characteristics of voltage drop along the transmission line after single-phase ground fault: When the fault occurs in the protection zone, the voltage drop amplitude along the line from the protection line installation point to the single-phase ground fault point is less than the voltage drop range from the protection installation to the protection setting range. Value; When the protection outside the protection zone occurs, the voltage drop amplitude along the line from the protection line installation to the single-phase ground fault point is greater than the voltage drop amplitude from the protection installation to the protection setting range. Therefore, the method of the invention is guaranteed If ^^(Δ^)] 2 + [ Δ^)] 2 < |x ieiZl / iei | is established, the action is protected. Where ϊ ίβΓ ϊ φ ζ 1— z 0 j
0 为 保护整定范围； 、 Z。分别为单位长度输电线路正序、 零序阻抗。 本发明方法利用沿线电压降落分布特性（即保护区内故障时， 输电线路保护安装处到单相接地故障点 的沿线电压降落幅值小于保护安装处到保护整定范围处的电压降落幅值； 保护区外故障时， 输电线路保护 安装处到单相接地故障点的沿线电压降落幅值大于保护安装处到保护整定范围处的电压降落幅值）实现了 输电线路单相接地故障全分量电压保护， 动作性能既不受***运行方式和负荷电流的影响， 又消除了过渡 电阻对保护动作性能的影响， 适用于输电线路单相接地故障的整个故障过程的保护。 0 is the protection setting range; , Z. They are the positive sequence and zero sequence impedance of the transmission line per unit length. The method of the invention utilizes the voltage drop distribution characteristic along the line (ie, the voltage drop amplitude along the line from the transmission line protection installation to the single-phase ground fault point is smaller than the voltage drop amplitude from the protection installation to the protection setting range when the fault occurs in the protection zone; In the case of an out-of-zone fault, the amplitude of the voltage drop along the transmission line protection installation to the single-phase ground fault point is greater than the voltage drop amplitude from the protection installation to the protection setting range.) The full-voltage protection of the single-phase ground fault of the transmission line is realized. The performance is not affected by the system operation mode and load current, and the effect of the transition resistance on the protection action performance is eliminated. It is suitable for the protection of the entire fault process of the single-phase ground fault of the transmission line.
以上所述仅为本发明的较佳具体实施例， 但本发明的保护范围并不局限于此， 任何熟悉本技术领域的 技术人员在本发明揭露的技术范围内， 可轻易想到的变化或替换， 都应涵盖在本发明的保护范围之内。
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any change or replacement that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention can be easily made. All should be covered by the scope of the present invention.
Claims
1、 一 +种输电线路单相接地故障全分量电压保护方法， 其步骤如下： 1. A full-component voltage protection method for single-phase ground fault in transmission lines. The steps are as follows:
Z1 Z1
( 1 )测量输电线路保护安装处的故障相电压 ύφ、故障相电流 ϊψ、故障相负序电流 ϊφι和零序电流 i0 (1) Measure the fault phase voltage ύ φ , fault phase current ϊψ, fault phase negative sequence current ϊ φ ι and zero sequence current i 0 at the transmission line protection installation location
Z Z
o o
其中， φ = 、 B、 C相， Among them, φ = , B, C phase,
(2 ) 计算输电线路保护安装处到单相接地故障点的电压降 Δί^的实部 Re(At^)和虚部 Im(At^) ： (2) Calculate the real part Re(At^) and the imaginary part Im(At^) of the voltage drop Δί^ from the transmission line protection installation to the single-phase ground fault point:
(3 ) 比较保护判据 < \xsetzjset \是否成立， 若成立， 则保护动作； 其中(3) Compare whether the protection criterion < \x set zj set \ is established. If it is established, the protection action will be taken; where
10 为保护整定范围 1 0 is the protection setting range
Z
Z
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310042967.1A CN103151764B (en) | 2013-01-31 | 2013-01-31 | Electric transmission line one-phase grounding fault full-component voltage protection method |
| CN201310042967.1 | 2013-01-31 |
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| CN103151764B (en) * | 2013-01-31 | 2014-12-31 | 福建省电力有限公司 | Electric transmission line one-phase grounding fault full-component voltage protection method |
| CN104852365B (en) * | 2015-05-15 | 2018-11-06 | 国家电网公司 | Based on single-end electrical quantity ultrahigh voltage alternating current transmission lines three phase short circuit fault method of discrimination |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5773980A (en) * | 1997-01-30 | 1998-06-30 | Abb Power T&D Company, Inc. | One-terminal fault location system that corrects for fault resistance effects |
| CN101291056A (en) * | 2007-04-17 | 2008-10-22 | 上海申瑞电力科技股份有限公司 | Faulty phase selection method based on long wire model |
| CN101325330A (en) * | 2008-07-30 | 2008-12-17 | 北京四方继保自动化股份有限公司 | Method for implementing earthing distance measurement element |
| CN102023275A (en) * | 2010-09-27 | 2011-04-20 | 华北电力大学 | Circuit single-end ranging method based on phase aberration characteristic of positioning function |
| CN102175952A (en) * | 2011-01-28 | 2011-09-07 | 华北电力大学 | Circuit single-phase ground distance measurement method |
| CN103151764A (en) * | 2013-01-31 | 2013-06-12 | 福建省电力有限公司 | Electric transmission line one-phase grounding fault full-component voltage protection method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1858953A (en) * | 2006-06-02 | 2006-11-08 | 北京四方继保自动化股份有限公司 | Protective method for zero sequence power direction based on local zero sequence compensation |
| ATE513223T1 (en) * | 2006-12-29 | 2011-07-15 | Abb Technology Ag | SYSTEM AND METHOD FOR LOCATION OF A SINGLE-POLE EARTH FAULT |
| US7599161B2 (en) * | 2006-12-29 | 2009-10-06 | General Electric Company | Relay device and corresponding method |
| EP2000811B1 (en) * | 2007-05-18 | 2017-12-13 | ABB Schweiz AG | Method for determining location of phase-to-earth fault |
-
2013
- 2013-01-31 CN CN201310042967.1A patent/CN103151764B/en active Active
- 2013-12-30 WO PCT/CN2013/090857 patent/WO2014117616A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5773980A (en) * | 1997-01-30 | 1998-06-30 | Abb Power T&D Company, Inc. | One-terminal fault location system that corrects for fault resistance effects |
| CN101291056A (en) * | 2007-04-17 | 2008-10-22 | 上海申瑞电力科技股份有限公司 | Faulty phase selection method based on long wire model |
| CN101325330A (en) * | 2008-07-30 | 2008-12-17 | 北京四方继保自动化股份有限公司 | Method for implementing earthing distance measurement element |
| CN102023275A (en) * | 2010-09-27 | 2011-04-20 | 华北电力大学 | Circuit single-end ranging method based on phase aberration characteristic of positioning function |
| CN102175952A (en) * | 2011-01-28 | 2011-09-07 | 华北电力大学 | Circuit single-phase ground distance measurement method |
| CN103151764A (en) * | 2013-01-31 | 2013-06-12 | 福建省电力有限公司 | Electric transmission line one-phase grounding fault full-component voltage protection method |
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| CN103151764B (en) | 2014-12-31 |
| CN103151764A (en) | 2013-06-12 |
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