JPH03123869A - Method and device for measuring higher harmonics in distribution line - Google Patents
Method and device for measuring higher harmonics in distribution lineInfo
- Publication number
- JPH03123869A JPH03123869A JP1262758A JP26275889A JPH03123869A JP H03123869 A JPH03123869 A JP H03123869A JP 1262758 A JP1262758 A JP 1262758A JP 26275889 A JP26275889 A JP 26275889A JP H03123869 A JPH03123869 A JP H03123869A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- distribution line
- voltage
- secondary side
- impedance
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 9
- 238000005259 measurement Methods 0.000 claims description 10
- 238000004804 winding Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Description
【発明の詳細な説明】
（ａ）産業上の利用分野
この発明は、電力の高圧配電系統の高調波成分（電圧歪
率）を配電線の中間端または末端に設番Ｊられている柱
上変圧器の２次側から測定する方法および装置に関する
。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial field of application This invention is a method for measuring harmonic components (voltage distortion factor) of a high-voltage power distribution system on a pole installed at the middle or end of a distribution line. The present invention relates to a method and apparatus for measuring from the secondary side of a transformer.
（ｂ）従来の技術
配電系統における高調波負荷の適正管理のための高調波
測定は、高圧需要家の取引計器および変電所二次側フィ
ーダーをおもな測定点としている力する手段と、前記変
圧器の既知の２次側換算イ （Ｃ）発明が解決しよ
うとする課題〉ビーダンス（Ｒ＋ｊＮＸ）を入力する手
段と、これ しかしながら、この測定点は事前に関
係部門とらの人力手段から入力された値を下記の式に代
入 時間帯、場所を調査して決定する必要がある。と
ころが、高圧需要家での測定は運転状況、測定環境等に
より測定時間帯、場所に制限を受ける場合がかなりある
。また、高調波障害発生時の原因調査等では広範囲な測
定が必要となり、事前調整に時間を要する場合がある。(b) Conventional technology Harmonic measurements for proper management of harmonic loads in power distribution systems are carried out using means for measuring high-voltage consumers' transaction meters and substation secondary feeders as the main measurement points; Known secondary side conversion of transformer Substitute the value into the formula below. It is necessary to determine the time and location by investigating. However, measurements at high-voltage consumers are often subject to restrictions on measurement time and location due to operating conditions, measurement environment, etc. Further, when investigating the cause of harmonic disturbances, extensive measurements are required, and preliminary adjustments may take time.
また、今までの測定方法であると配電線全域にわたる高
調波の分布の測定では一部盲点を生じていた。In addition, conventional measurement methods have caused some blind spots when measuring the distribution of harmonics over the entire distribution line.
そこで、この発明の目的は柱上変圧器の二次側の電圧、
電流を測定することによって上記のような問題を生じる
ことがない高調波測定方法および装置を堤供することに
ある。Therefore, the purpose of this invention is to reduce the voltage on the secondary side of a pole transformer.
The object of the present invention is to provide a harmonic measuring method and device that does not cause the above-mentioned problems by measuring current.
（ｄ１課題を解決するための手段
この発明は、配電線の中間端または末端に配設される打
上変圧器の２次側の電圧（Ｖｚ＋、 ＶｔＮ）および
電流（Ｉｚ＋、 １２．ｌ）を測定し、この測定値と
前記変圧器に対する既知の２次側換算インピーダンス（
Ｒ＋ｊＮＸ）とを下記の式に代入して配電線の電圧歪率
を測定することを特徴とする。(d1 Means for Solving the Problems) This invention measures the voltage (Vz+, VtN) and current (Iz+, 12.l) on the secondary side of a launching transformer installed at the intermediate or terminal end of a distribution line. Then, this measured value and the known secondary side converted impedance (
The method is characterized in that the voltage distortion rate of the distribution line is measured by substituting R+jNX) into the following equation.
また、この発明は、上記の電圧、電流の入力手段、変圧
器の既知の２次側換算インピーダンス人力手段、および
、これらの入力手段から入力された値に基づいて上記の
式を演算する演算手段を備えたことを特徴とする。The present invention also provides the above voltage and current input means, known secondary side converted impedance manual means of the transformer, and calculation means for calculating the above equation based on the values input from these input means. It is characterized by having the following.
（８１作用
この発明に係る測定方法では、予め測定ポイントに設置
されている柱上トランスの既知のインピーダンス分を求
めておく。そして、その地点の柱上トランスの二次側の
電圧および電流を基本渡分、高調波分に分けてそれぞれ
測定する。これらの測定値と上記の既知のインピーダン
スとから上記の式によって配電線の高調波を測定する。(81 Effect) In the measurement method according to the present invention, the known impedance of the pole transformer installed at the measurement point is determined in advance.Then, the voltage and current on the secondary side of the pole transformer at that point are basically calculated. The voltage distribution and harmonic components are measured separately. From these measured values and the above-mentioned known impedance, the harmonics of the distribution line are measured using the above formula.
なお、上記の式で得られるＶＩＮ／Ｖｌｌはトランス−
次側のＮ次高調波電圧歪率である。Note that VIN/Vll obtained from the above formula is trans-
This is the Nth harmonic voltage distortion factor on the next side.
また、この発明の測定装置では上記の測定方法に使用す
るものであり、測定高調波電圧、測定高調波電流および
変圧器インピーダンスを人力することにより、直ちに１
次側の電圧歪率を求めることが出来る。In addition, the measuring device of the present invention is used in the above-mentioned measuring method, and can immediately measure the measured harmonic voltage, measured harmonic current, and transformer impedance by hand.
The voltage distortion factor on the next side can be determined.
（ｆ）実施例
図は配電線の中間端または末端に配設されている柱上ト
ランスの二次側を一次側に換算した簡易等価回路を示し
ている。(f) Example The diagram shows a simplified equivalent circuit in which the secondary side of a pole transformer installed at the intermediate or terminal end of the distribution line is converted into the primary side.
同図において、ｒ１／ａ２＋ｒｚ＝Ｒ，Ｘ＋／ａ２＋Ｘ
ｔ＝Ｘとすると、−次電圧Ｖ、／ａは（１１式で表すこ
とができる。In the same figure, r1/a2+rz=R,X+/a2+X
When t=X, the negative voltage V, /a can be expressed by equation (11).
Ｖ＋／ａ ＝Ｖｚ／Ｉｚ （Ｒ＋ｊＸ ）
・１１今、−次側の第Ｎ次調波の電圧をＶ １Ｈ／
ａ 、基を１２＋とすれば、−次側のＮ次高調波電圧歪
率は（２）弐で表すことができる。V+/a = Vz/Iz (R+jX)
・11 Now, the voltage of the Nth harmonic on the negative side is V 1H/
If the base a is 12+, the Nth harmonic voltage distortion factor on the negative side can be expressed as (2)2.
ただし、ＮＸは二次側換算−次側巻線リアクトルと二次
側巻線リアクトルのＮ次における合成インピーダンスで
ある。However, NX is the combined impedance of the secondary-side converted secondary-side winding reactor and the secondary-side winding reactor at the Nth order.
上記（２）式において、トランスの巻線インピーダンス
（式中のＩ？＋ｊＸおよびＲ＋ｊＮＸ）は既知のもので
あるので、二次側の電圧、電流の基本波、高調波分を測
定することにより一次側の電圧歪率を求めることができ
る。In equation (2) above, the winding impedance of the transformer (I?+jX and R+jNX in the equation) is known, so by measuring the fundamental wave and harmonic components of the voltage and current on the secondary side, the primary The voltage distortion factor on the side can be determined.
次に、以上のようにして電圧歪率を求める高調波分析器
について第２図を参照して説明する。Next, a harmonic analyzer for determining the voltage distortion factor as described above will be explained with reference to FIG. 2.
同図において、ＰＴ、ＣＴは柱上変圧器の２次側電圧、
電流をＡ／Ｄ変換し、その値をＣＰＵで公知のＦＦＴ法
により基本波成分と高調波成分とに分けられる。一方、
変圧器の既知の２次側換算インピーダンス（Ｒ，ｊＮＸ
）データは操作パネル等により入力され、予めＲＡＭ内
に記憶されている。ＣＰＵはこのインピーダンスデータ
および上記の測定データの基本波成分と高調波成分とか
ら、上記に示した演算を実行し、その結果（電圧歪率）
を操作パネル内の表示器に表示したり印字したりする。In the figure, PT and CT are the secondary voltages of the pole transformer,
The current is A/D converted, and its value is divided into fundamental wave components and harmonic components by a CPU using a known FFT method. on the other hand,
The known converted secondary impedance of the transformer (R, jNX
) The data is input through an operation panel or the like and is stored in advance in the RAM. The CPU executes the calculation shown above from this impedance data and the fundamental wave component and harmonic component of the above measurement data, and calculates the result (voltage distortion rate).
Display or print on the display in the operation panel.
なお、演算式は予めＲＯＭに記憶されている。Note that the arithmetic expression is stored in the ROM in advance.
ｔｇ）発明の効果
ごの発明によれば、通常、柱上変圧器の二次側の電圧、
電流測定は容易に行えるので、ＰＴ等がな（ても任意の
時に高圧配電系統の基本波成分に対する高調波成分の含
有率、すなわち電圧歪率を測定することが可能になる。tg) Effects of the Invention According to the invention, the voltage on the secondary side of a pole transformer,
Since current measurement can be easily carried out, it becomes possible to measure the content ratio of harmonic components to the fundamental wave component of the high voltage distribution system, that is, the voltage distortion rate, at any time even without the need for PT.
第１図は柱上トランスの一次側を二次側に換算した時の
簡易等価回路図である。第２図は高調波分析器のブロッ
ク図である。FIG. 1 is a simplified equivalent circuit diagram when converting the primary side of a pole transformer into the secondary side. FIG. 2 is a block diagram of the harmonic analyzer.
Claims (2)
器の２次側の電圧（■＿２＿１、■＿２＿Ｎ）および電
流（■＿２＿１、■＿２＿Ｎ）を測定し、この測定値と
前記変圧器に対する既知の２次側換算インピーダンス（
Ｒ＋ｊＮＸ）とを下記の式に代入し、インピーダンス電
圧降下を算出して配電線の電圧歪率を測定することを特
徴とする、配電線の高調波測定方法。 ▲数式、化学式、表等があります▼(1) Measure the voltage (■_2_1, ■_2_N) and current (■_2_1, ■_2_N) on the secondary side of the pole transformer installed at the middle or end of the distribution line, and combine this measurement value with the Known secondary-side equivalent impedance to the transformer (
A method for measuring harmonics of a power distribution line, the method comprising: substituting R+jNX) into the following equation, calculating an impedance voltage drop, and measuring a voltage distortion rate of the power distribution line. ▲Contains mathematical formulas, chemical formulas, tables, etc.▼
器の位置で測定した該変圧器の２次側の電圧（■＿２＿
１、■＿２＿Ｎ）および電流（■＿２＿１、■＿２＿Ｎ
）を入力する手段と、前記変圧器の既知の２次側換算イ
ンピーダンス（Ｒ＋ｊＮＸ）を入力する手段と、これら
の入力手段から入力された値を下記の式に代入して前記
変圧器の１次側の電圧歪率を算出する演算手段と、を備
えてなる、配電線の高調波測定装置。 ▲数式、化学式、表等があります▼(2) Voltage on the secondary side of the pole transformer installed at the intermediate or terminal end of the distribution line (■_2_
1, ■_2_N) and current (■_2_1, ■_2_N
), means for inputting the known converted secondary impedance (R+jNX) of the transformer, and substituting the values input from these input means into the following formula to calculate the primary impedance of the transformer A harmonic measuring device for a power distribution line, comprising: arithmetic means for calculating a side voltage distortion factor. ▲Contains mathematical formulas, chemical formulas, tables, etc.▼
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1262758A JPH03123869A (en) | 1989-10-06 | 1989-10-06 | Method and device for measuring higher harmonics in distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1262758A JPH03123869A (en) | 1989-10-06 | 1989-10-06 | Method and device for measuring higher harmonics in distribution line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03123869A true JPH03123869A (en) | 1991-05-27 |
Family
ID=17380182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1262758A Pending JPH03123869A (en) | 1989-10-06 | 1989-10-06 | Method and device for measuring higher harmonics in distribution line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03123869A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012182990A (en) * | 2009-01-14 | 2012-09-20 | Accenture Global Services Ltd | Method for determination of distribution transformer voltage based on metered load |
-
1989
- 1989-10-06 JP JP1262758A patent/JPH03123869A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012182990A (en) * | 2009-01-14 | 2012-09-20 | Accenture Global Services Ltd | Method for determination of distribution transformer voltage based on metered load |
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