JPH02105076A - Fault point locating type traveling wave relay device - Google Patents
Fault point locating type traveling wave relay deviceInfo
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- JPH02105076A JPH02105076A JP63259849A JP25984988A JPH02105076A JP H02105076 A JPH02105076 A JP H02105076A JP 63259849 A JP63259849 A JP 63259849A JP 25984988 A JP25984988 A JP 25984988A JP H02105076 A JPH02105076 A JP H02105076A
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- 230000006698 induction Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、送電線故障時に発生する電流サージ波（進行
波）の分波現象を利用し、区間内故障ならびに区間外故
障を高速で検出し、故障点までの距離を標定して表示で
きるようにするとともに遮断器にトリップ、または抑制
信号を与える故障点標定方式進行波リレー装置に関する
ものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention utilizes the splitting phenomenon of current surge waves (traveling waves) that occur when power transmission line faults occur, and detects faults within the section and faults outside the section at high speed. The present invention relates to a fault point locating traveling wave relay device that locates and displays the distance to a fault point and provides a trip or suppression signal to a circuit breaker.
［従来技術］
さきに、特願昭６１−１８８２８９号（特開昭Ｈ−４４
１８５号）で、「送電線故障点標定方式」を提案した。[Prior art] Firstly, Japanese Patent Application No. 188289/1989 (Japanese Patent Application No.
No. 185), we proposed a ``transmission line fault location method''.
この方式は、送電線の一端において進行波検出手段によ
って、故障によって生じた進行波Ｔｔｉ流を検出し、前
記進行波電流に含まれる線間渡分のピークに対する対地
液分のピークの時間遅れを検出し、この遅れ時間に基い
て故障点を標定するものである。In this method, a traveling wave Tti current caused by a fault is detected by a traveling wave detection means at one end of the transmission line, and the time delay of the peak of the ground liquid component with respect to the peak of the line distribution included in the traveling wave current is detected. The fault point is located based on this delay time.
この方式によれば、進行波電圧を検出する方式と相違し
て、故障が発生したときに生じる進行波電流を捉らえて
標定を行っているので、標定の信頼性を改善することが
できる。According to this method, unlike the method of detecting traveling wave voltage, since the location is performed by capturing the traveling wave current that occurs when a failure occurs, the reliability of location can be improved.
一方、従来の送電線リレーで、その多くは商用周波の電
圧、電流の関係から線路の故障判定を行っている。この
ため１サイクルで判定したとしても、１／ＧＯ〜５０＝
１７−２０ Ｃｍｓ ］の時間を必要とする。On the other hand, most conventional power transmission line relays determine line failure based on the relationship between commercial frequency voltage and current. Therefore, even if the judgment is made in one cycle, 1/GO ~ 50 =
17-20 Cms].
［発明の目的、構成コ
すでに若干触れたが、故障点より線路上のある一点に達
する線間波電流と対地波電流には伝搬時間差があり、線
間波の１に■当りの伝播時間は３．３［μｓ／ｋｍコ、
対地波のそれは３．３／α［μｓ／ｋｓ］（但し、αは
０．８程度）であって、数１０に＋＋の送電線でも数１
００μｓを越えることなく故障点の検出が可能で、これ
を前述の商用周波１サイクル、つまり１７〜２Ｇ ［：
ｍｓ ］で判定するリレ一方式のものよりはるかに高
速で検出ができることになる。[Purpose of the invention and configuration As already mentioned, there is a propagation time difference between the line wave current and the ground wave current that reach a certain point on the line from the fault point, and the propagation time per line wave is 3.3 [μs/km,
That of ground waves is 3.3/α [μs/ks] (however, α is about 0.8), and even for power transmission lines of several 10 to ++, it is several 1
It is possible to detect the failure point without exceeding 00 μs, and this can be done at one cycle of the commercial frequency mentioned above, that is, 17 to 2G [:
This means that detection can be performed much faster than the one-relay type, which makes judgments based on [ms].
本発明はこのような観点から、上記提案の標定方式に則
り、故障時、故障が区間内で生じたものか、区間外で生
じたものか判別し、遮断器にトリップ、または抑制信号
を与えるとともに故障点までの距離を表示する故障点標
定式進行波リレー装置を提供するものである。From this point of view, the present invention is based on the above-proposed location method, and when a failure occurs, it is determined whether the failure occurred within the section or outside the section, and a trip or suppression signal is given to the circuit breaker. The present invention also provides a fault point locating type traveling wave relay device that displays the distance to the fault point.
以下、第１図に示す実施例および第２図（イ）、（すに
示す各部動作波形図により本発明を説明する。The present invention will be explained below with reference to the embodiment shown in FIG. 1 and the operation waveform diagrams of each part shown in FIGS.
第１図において示すように、本装置はサージ電流検出部
と光信号伝送部、事故区間判定及び故障点標定部からな
っている。As shown in FIG. 1, this device consists of a surge current detection section, an optical signal transmission section, and a fault section determination and failure point locating section.
サージ電流検出部は線路１に結合された高周波ＣＴ２
、電気−光変換器３で構成し、光ファイバ４による光信
号伝送部を具え、事故区間判定及び故障点標定部は光−
電気変換器５．増幅回路６、受信した信号の極性を揃え
る全波整回路７、加算回路８．波形整形回路９．ゲート
パルス発生回路１０゜アンド回路１１．さらに距離計数
パルス発生回路１２と演算回路により構成している。な
お、本構成は１回線送電ａ装置の構成を示している。The surge current detection section is a high frequency CT2 coupled to the line 1.
, an electric-to-optical converter 3, an optical signal transmission section using an optical fiber 4, and an optical
Electrical converter5. An amplifier circuit 6, a full-wave rectifying circuit 7 for aligning the polarity of received signals, and an adder circuit 8. Waveform shaping circuit 9. Gate pulse generation circuit 10° AND circuit 11. Furthermore, it is composed of a distance counting pulse generation circuit 12 and an arithmetic circuit. Note that this configuration shows the configuration of a single-line power transmission device a.
送電線１のＡ 、Ｂ 、Ｃ相において、故障相Ａの進行
波７ｒｉ流をＩＡ 、Ｍ導相Ｂ、ＣのそれをＩｎ、Ｉｃ
とすると、−船釣に、平衡線路において次の関係が成立
つ。In the A, B, and C phases of the transmission line 1, the traveling wave 7ri current of the faulty phase A is IA, and that of the M conducting phases B and C is In and Ic.
Then, for - boat fishing, the following relationship holds true on the balanced line.
但し、Ｉｅは対地波成分Ｎ Ｉｔは線間波成分である。However, Ie is the ground wave component N, and It is the line wave component.
第２Ｎａ）に示すようにｓ ＩＡ、Ｉｎ＋Ｉｃが高周
波ＣＴ２に到達したとき、実測でも、例えばマイナスの
ＩＡの線間波成分ＩＬに対して、Ｉｎ、ＩｃのＩＬはほ
ぼプラス１７２の値を示し、遅れて到達するマイナスの
ＩＡの対地波成分のマイナスのＩｅに対してＩｎ、＋Ｉ
ｃのＩｅはほぼ同様にマイナスＩｅを示す。As shown in 2nd Na), when s IA, In + Ic reaches the high frequency CT2, the IL of In, Ic shows a value of approximately plus 172, for example, compared to the line wave component IL of negative IA, even in actual measurements. In, +I for the negative Ie of the ground wave component of the negative IA that arrives late.
Ie of c shows minus Ie in almost the same way.
Ａ 、Ｂ 、Ｃ相に設置した高周波ＣＴ２により検出さ
れたサージ電流を電気−光変換器３で光信号に変損し、
光ファイバ４により伝送し、光−電気変換１ｉ５により
電気信号に変換する。この信号を増幅器のＡｌ−Ａ３を
介して全波整流回路７のＤ１〜Ｄ３に加え極性を揃えた
のち、加算器８のＡＤＤ−１に入力する。ここではサー
ジｔ４２１ｔの線間波の極性が揃えられているため、打
消されることなく加算？れ、（！）式より２Ｉｔ ＋
３１ｅの大きな出方が得られ、波形整形回路９の５Ｈ−
１により線間波成分Ｉｔ、の到着を知る起動信号が得ら
れる。The surge current detected by the high frequency CT 2 installed in the A, B, and C phases is converted into an optical signal by the electro-optic converter 3,
The signal is transmitted through the optical fiber 4 and converted into an electrical signal by the optical-to-electrical converter 1i5. This signal is applied to D1 to D3 of the full-wave rectifier circuit 7 via the amplifier Al-A3 to make the polarities uniform, and then input to ADD-1 of the adder 8. Here, the polarities of the line waves of the surge t421t are aligned, so it is not canceled but added? From the formula (!), 2It +
A large output of 31e is obtained, and the waveform shaping circuit 9's 5H-
1 provides a starting signal that indicates the arrival of the line wave component It.
一方、加算器８のＡＤＤ−２では逆極性関係にある故障
相Ａと誂導相Ｂ、Ｃの線間波成分が打消され、同一極性
の関係にある対地波成分−３Ｉｅのみが（１）式よりｊ
Ｏられ、全波整流回路７のＤ４と波形整形回路９の５Ｈ
−２を介して対地波成分の到着を知る起動信号を得る。On the other hand, in ADD-2 of the adder 8, the line wave components of the faulty phase A and the guided phases B and C, which have an opposite polarity relationship, are canceled, and only the ground wave component -3Ie, which has the same polarity relationship, becomes (1). From the formula j
D4 of the full-wave rectifier circuit 7 and 5H of the waveform shaping circuit 9
-2, an activation signal is obtained that indicates the arrival of the ground wave component.
前記ＳＨ−１よりの起動信号はゲートパルス発生回路１
０ＧＰ−１とＧＰ−３に入力し、ＧＰ−１の出力側はＧ
Ｐ−２の入力側と接続され、ＧＰ−１と５Ｈ−２との出
力側はアンド回路ＨのＡｎｄ−１の入力側と接続され、
ＧＰ−２と５Ｈ−２の出力側はＡｎｄ−２の入力側と接
続され、ＧＰ−３，距離計数パルス発振回路Ｉ２の出力
側はＡｎｄ−３の入力側に接続され、その出力側は演算
回路■３に接続される。The activation signal from the SH-1 is sent to the gate pulse generation circuit 1.
Input to 0GP-1 and GP-3, output side of GP-1 is G
It is connected to the input side of P-2, and the output sides of GP-1 and 5H-2 are connected to the input side of And-1 of AND circuit H.
The output sides of GP-2 and 5H-2 are connected to the input side of And-2, and the output side of GP-3 and distance counting pulse oscillation circuit I2 is connected to the input side of And-3. Connected to circuit ■3.
ここで、 ５Ｈ−１より線間波成分の到着を知る起動信
号が発生すると第２図（イ）のＧＰ−１、ＧＰ−３の波
形で示すようにそれぞれ、区間内故障判定基準信号、故
障点距離計数器動作信号を発生し、ＧＰ−２の波形で示
すように、 ＧＰ−２では、ＧＰ−１の区間内故障判定
基準信号の消滅とともに区間外故障判定基準信号を発生
する。Here, when a start signal indicating the arrival of the line wave component is generated from 5H-1, as shown by the waveforms of GP-1 and GP-3 in Fig. 2 (a), the intra-section fault judgment reference signal and the fault As shown by the waveform of GP-2, GP-2 generates an out-of-section failure determination reference signal when the within-section failure determination reference signal of GP-1 disappears.
ここで、ゲートパルス発生回路ＧＰ−１による区間内故
障判定基準信号幅Ｔｃは線路亘長Ｌ ［ｋｍ ］の場合
、線間波と対地波のずれ時間、Ｋ ＝＝ ０．８３ ［
μＳ／に膿］とすると、
Ｔｃ＝ＫＸＬ＝０．８３Ｌ［μＳコでなければならない
。Here, the intra-section failure determination reference signal width Tc generated by the gate pulse generation circuit GP-1 is the deviation time between the line wave and the ground wave, K == 0.83 [when the line spanning length is L [km]].
μS/μS], then Tc=KXL=0.83L[μS].
さらに、故障点標定を行うために、 ＧＰ−３よりの故
障点距離計数器動作信号によりＡｎｄ−３において距離
計数パルス発振回路１２よりの計数パルスを演算回路１
３に送り込む。Furthermore, in order to locate the fault point, the counting pulse from the distance counting pulse oscillation circuit 12 is sent to the calculation circuit 1 in And-3 by the fault point distance counter operation signal from GP-3.
Send it to 3.
ゲートパルス発生回路ＩＯのＧＰ−１に接続されたＡｎ
ｄ−１には、上述のように基準信号幅Ｔｃのパルスが入
力されるが、この基準信号幅Ｔｃのパルスが消滅しない
ように、遅れて到達する対地波到達の信号が入力すれば
、 Ａｎｄ−１は出力する。つまりこの場合、基準信号
幅Ｔｃにより亘長Ｌｋ■の送電線において、前記サージ
電流検出部が区間の一端に配設されると、この区間内の
どの点に故障点があってもこれを区間内にあるものと確
実に判別するものである。故障点が区間内の他端にある
場合でも、これを区間内にあるものと確実に判別する。An connected to GP-1 of gate pulse generation circuit IO
As described above, a pulse with the reference signal width Tc is input to d-1, but if a signal arriving at the ground wave that arrives late is input so that the pulse with the reference signal width Tc does not disappear, then -1 is output. In other words, in this case, if the surge current detection section is installed at one end of a section of a power transmission line with a length Lk due to the reference signal width Tc, no matter where there is a fault point within this section, it will be detected as a section. It is something that can be reliably identified as being inside. To reliably determine that a failure point is within an interval even if it is at the other end of the interval.
ＧＰ−２は前記ＧＰ−１のパルスが消滅と同時に出力す
る。このＧＰ−２によるパルスはＡｎｄ−２に入力し、
第２図（ロ）に示すように、 ５Ｈ−２よりの対地波到
達の信号を待ち、その到達によりＡｎｄ−２より信号を
出力する。この出力信号は故障が区間外であることを判
別するものである。GP-2 is output at the same time as the pulse of GP-1 disappears. This pulse from GP-2 is input to And-2,
As shown in FIG. 2 (b), it waits for the arrival of the ground wave signal from 5H-2, and upon its arrival, outputs the signal from And-2. This output signal is used to determine that the failure is outside the section.
前述のように、線間波の到着により発生したＧＰ−３の
計数回路動作信号によりゲートを開き、距離計数パルス
発生回路１２の出力を演算中に対地波が到達したときは
５Ｈ−２の出力でＧＰ−３の計数回路動作信号を停止し
Ｎ Ａｎｄ−３を閉じて計数を停止する。このとき演算
回路１３の指示値より故障点距離を対地波の１に１当り
に要する伝搬時間により演算処理し、標定を行い距離表
示をする。As mentioned above, the gate is opened by the counting circuit operation signal of GP-3 generated by the arrival of the line wave, and when the ground wave arrives while calculating the output of the distance counting pulse generation circuit 12, the output of 5H-2 is opened. At this point, the GP-3 counting circuit operation signal is stopped, N And-3 is closed, and counting is stopped. At this time, the distance to the fault point is calculated based on the instruction value of the calculation circuit 13 based on the propagation time required for every 1 part of the ground wave, and the position is determined and the distance is displayed.
第３図は、送電線における本装置の配置を概略的に示す
。電源Ｇに接続される送電線１に対して遮断Ａ ＣＢ＋
、ＣＢ２によって分岐部が形成され、更に遮断器ＣＢ
３ 、ＣＢ４によって分岐部が形成され、更にＣＢｓ
、ＣＢｅによって分岐部が順に形成され、この分岐部よ
りそれぞれ送電線、配電線が接続される。FIG. 3 schematically shows the arrangement of the device on a power transmission line. Cutoff A CB+ for power transmission line 1 connected to power supply G
, CB2 form a branch, and further a circuit breaker CB
3, a branch is formed by CB4, and further CBs
, CBe sequentially form branch parts, and power transmission lines and distribution lines are connected to these branch parts, respectively.
図において、例えばＣＢ２とＣＢ３．ＣＢ４とＣＢ５は
それぞれ、一つの送電線区間である。In the figure, for example, CB2 and CB3. CB4 and CB5 are each one power transmission line section.
例えばＣＢ２とＣＢ３による区間において、その−端に
本発明の故障点標定式進行法リレー装置Ｒ１を設置した
場合、本装置は、線路上において発生するサージ電流発
生位置を知ることができるが、この装置部ではその故障
発生位置が上流側、あるいは下流側で生じたものか、区
間が多段にわたる場合、−船釣にはその方向まで識別で
きない場合を生じるから、図示のように区間の両端に木
製ｆ２ＺＲ＋、Ｒ２を設置し、サージ電流の到達時間差
（プラス、又はマイナス）を検出すれば、上流側、下流
側そのいずれかに故障点のあることを判別することがで
きる。For example, in the section between CB2 and CB3, if the failure point locating progress method relay device R1 of the present invention is installed at the negative end of the section, this device can know the position of surge current occurring on the track. In the equipment section, if the failure occurs on the upstream or downstream side, or if the section spans multiple stages, it may not be possible to identify the direction in boat fishing. By installing f2ZR+ and R2 and detecting the arrival time difference (positive or negative) of the surge current, it is possible to determine that there is a failure point on either the upstream side or the downstream side.
［発明の効果］
（１）本発明によれば、区間内故障か、区間外故障かの
判定が超高速でできる。[Effects of the Invention] (1) According to the present invention, it is possible to determine whether a fault is within a section or a fault outside of a section at an extremely high speed.
現状で一番動作速度の早い継電器に用いる故障ｉｌＩｌ
装定、例えば５００ ｋＶ系の距離継電器によるもので
１．５サイクル（５０サイクルベースで３０［ｍｓ］）
で、これに比べ本発明の装置によれば、通常は数１０［
μＳ］で判定できる。Failures used in relays with the fastest operating speed currently available
For example, 1.5 cycles (30 [ms] based on 50 cycles) using a 500 kV distance relay.
In contrast, according to the device of the present invention, the number of
μS].
（２）上記に従って遮断器の超高速遮断が可能となる。(2) According to the above, ultra-high-speed breaking of the circuit breaker is possible.
（３）故障点の標定は電流標定によっており、電圧標定
方式によるもののように、誘導型によって誤標定を避け
ることができ、極めて正確な標定を行うことができる。(3) The fault point is located by current location, and the induction method, like the voltage location method, can avoid erroneous location and provide extremely accurate location.
（４）従来は、継電器と故障点標定装置は別々に構成さ
れていたが、本発明では正確な故障点標定と超高速遮断
の信号を、殆んど装置の構成大部分を共用して構成する
ことができる、等の効果がある。(4) Conventionally, relays and fault point locating devices were configured separately, but in the present invention, accurate fault point locating and ultra-high-speed shutoff signals are achieved by sharing most of the device components. There are effects such as being able to.
第１図は本発明の実施例をブロック図で示す。
第２図は、第１図実施例の各部動作波形図で、（イ）は
区間内故障波形図、（→は区間外故障波形図を示す。
第３図は、送電線における本発明装置の設置図である。
１・・・線路、２・・・高周波ＣＴ、３・・・電気−光
変換器、４・・・光ファイバ、５・・・光−電気変換器
、６・・・増幅回路、７・・・全波整流回路、８・・・
加算回路、９・・・波形整形回路、ＩＯ・・・ゲートパ
ルス発生回路、■・・・アンド回路、 １２・・・距離
計数パルス発振回路、１３・・・演算回路。FIG. 1 shows in block diagram form an embodiment of the invention. FIG. 2 is a waveform diagram showing the operation of each part of the embodiment shown in FIG. It is an installation diagram. 1... Line, 2... High frequency CT, 3... Electrical-optical converter, 4... Optical fiber, 5... Optical-electrical converter, 6... Amplification Circuit, 7...Full wave rectifier circuit, 8...
Addition circuit, 9... Waveform shaping circuit, IO... Gate pulse generation circuit, ■... AND circuit, 12... Distance counting pulse oscillation circuit, 13... Arithmetic circuit.
Claims (4)
差が設定時間内にあるか、否かにより区間内故障か、区
間外故障かを判定させることを特徴とする故障判定装置
。(1) A failure determination device that determines whether a fault is within a section or a fault outside a section, depending on whether or not a current arrival time difference between a line wave current of a traveling wave and a ground wave current is within a set time.
をトリップさせることを特徴とする進行波リレー装置。(2) A traveling wave relay device according to claim (1), wherein a circuit breaker is tripped in the event of an intra-section fault.
到達時間差を距離に変換し、前記線間波電流、対地波電
流検出点から故障点までの距離を標定することを特徴と
する故障点標定装置。(3) Using claim (1), the difference in arrival time between the line wave current and ground wave current is converted into a distance, and the distance from the line wave current and ground wave current detection point to the fault point is located. Characteristic failure point locating device.
る故障点進行波リレー装置。(4) A fault point traveling wave relay device characterized by comprising claims (1) and (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63259849A JPH02105076A (en) | 1988-10-14 | 1988-10-14 | Fault point locating type traveling wave relay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63259849A JPH02105076A (en) | 1988-10-14 | 1988-10-14 | Fault point locating type traveling wave relay device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02105076A true JPH02105076A (en) | 1990-04-17 |
Family
ID=17339832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63259849A Pending JPH02105076A (en) | 1988-10-14 | 1988-10-14 | Fault point locating type traveling wave relay device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02105076A (en) |
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|---|---|---|---|---|
| CN103116112A (en) * | 2013-01-06 | 2013-05-22 | 广东电网公司电力科学研究院 | Double-circuit on same tower double-circuit line fault distance measurement method |
| CN105116294A (en) * | 2015-09-18 | 2015-12-02 | 国家电网公司 | Traveling wave polarity measure based power distribution network cable fault monitoring method |
| CN105158637A (en) * | 2015-08-18 | 2015-12-16 | 广东电网有限责任公司电力科学研究院 | Fault traveling wave location method of multiple branch lines of power distribution network |
| CN105301441A (en) * | 2015-10-12 | 2016-02-03 | 深圳供电局有限公司 | Method and system for positioning tower fault in time-frequency domain combination |
| CN105445614A (en) * | 2015-11-06 | 2016-03-30 | 深圳供电局有限公司 | Double-end traveling wave fault positioning method and system based on wavelet analysis |
| CN105929307A (en) * | 2016-07-05 | 2016-09-07 | 哈尔滨工业大学 | Current gatherer adaptive to traveling wave range finding demands |
| CN110161377A (en) * | 2019-06-26 | 2019-08-23 | 武汉三相电力科技有限公司 | A kind of cable fault independent positioning method and equipment |
| CN111880045A (en) * | 2020-07-21 | 2020-11-03 | 长沙理工大学 | High-resistance grounding fault detection method based on traveling wave full waveform |
| CN112505472A (en) * | 2020-10-19 | 2021-03-16 | 国网辽宁省电力有限公司电力科学研究院 | Three-phase hybrid power supply network fault location method based on traveling wave |
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-
1988
- 1988-10-14 JP JP63259849A patent/JPH02105076A/en active Pending
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|---|---|---|---|---|
| CN103116112B (en) * | 2013-01-06 | 2015-06-10 | 广东电网公司电力科学研究院 | Double-circuit on same tower double-circuit line fault distance measurement method |
| CN103116112A (en) * | 2013-01-06 | 2013-05-22 | 广东电网公司电力科学研究院 | Double-circuit on same tower double-circuit line fault distance measurement method |
| CN105158637A (en) * | 2015-08-18 | 2015-12-16 | 广东电网有限责任公司电力科学研究院 | Fault traveling wave location method of multiple branch lines of power distribution network |
| CN105116294A (en) * | 2015-09-18 | 2015-12-02 | 国家电网公司 | Traveling wave polarity measure based power distribution network cable fault monitoring method |
| CN105301441A (en) * | 2015-10-12 | 2016-02-03 | 深圳供电局有限公司 | Method and system for positioning tower fault in time-frequency domain combination |
| CN105445614B (en) * | 2015-11-06 | 2018-06-22 | 深圳供电局有限公司 | Double-end traveling wave fault positioning method and system based on wavelet analysis |
| CN105445614A (en) * | 2015-11-06 | 2016-03-30 | 深圳供电局有限公司 | Double-end traveling wave fault positioning method and system based on wavelet analysis |
| CN105929307A (en) * | 2016-07-05 | 2016-09-07 | 哈尔滨工业大学 | Current gatherer adaptive to traveling wave range finding demands |
| CN110161377A (en) * | 2019-06-26 | 2019-08-23 | 武汉三相电力科技有限公司 | A kind of cable fault independent positioning method and equipment |
| CN111880045A (en) * | 2020-07-21 | 2020-11-03 | 长沙理工大学 | High-resistance grounding fault detection method based on traveling wave full waveform |
| CN111880045B (en) * | 2020-07-21 | 2022-08-05 | 长沙理工大学 | High-resistance grounding fault detection method based on traveling wave full waveform |
| CN112505472A (en) * | 2020-10-19 | 2021-03-16 | 国网辽宁省电力有限公司电力科学研究院 | Three-phase hybrid power supply network fault location method based on traveling wave |
| CN112505472B (en) * | 2020-10-19 | 2023-01-24 | 国网辽宁省电力有限公司电力科学研究院 | Three-phase hybrid power supply network fault location method based on traveling wave |
| CN112649700A (en) * | 2020-12-09 | 2021-04-13 | 长沙理工大学 | Traveling wave network positioning method based on dynamic virtual fault |
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