JPS6347055B2 - - Google Patents
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- Publication number
- JPS6347055B2 JPS6347055B2 JP7411781A JP7411781A JPS6347055B2 JP S6347055 B2 JPS6347055 B2 JP S6347055B2 JP 7411781 A JP7411781 A JP 7411781A JP 7411781 A JP7411781 A JP 7411781A JP S6347055 B2 JPS6347055 B2 JP S6347055B2
- Authority
- JP
- Japan
- Prior art keywords
- tap
- arc
- voltage
- breaker
- extinguishing reactor
- 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.)
- Expired
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- Control Of Electrical Variables (AREA)
Description
【発明の詳細な説明】
本発明は消弧リアクトルのタツプを電力系統の
構成の変更に応じて自動的に調整する制御方式に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system for automatically adjusting the tap of an arc-extinguishing reactor in response to changes in the configuration of an electric power system.
消弧リアクトルは主変圧器の中性点と大地間に
接続され、送電線事故時の接地電流の大部分を占
める容量分をリアクタンスにより打消すものであ
る。そのため、消弧リアクトルのインダクタンス
が系統の対地静電容量と共振するように設定され
る。対地静電容量は系統構成にて変更が生じると
変化するため、消弧リアクトルにはタツプを設け
て系統構成の変更毎に最適のタツプに調整するよ
うになつている。 The arc-extinguishing reactor is connected between the neutral point of the main transformer and the ground, and uses reactance to cancel out the capacitance that accounts for most of the ground current in the event of a transmission line fault. Therefore, the inductance of the arc-extinguishing reactor is set to resonate with the ground capacitance of the system. Since the ground capacitance changes when there is a change in the system configuration, a tap is provided on the arc-extinguishing reactor so that it can be adjusted to the optimum tap each time the system configuration changes.
このタツプ調整は、従来は、各タツプごとに残
留電圧を測定するためタツプの切換ごとにしや断
器の開閉操作をくり返して共振カーブを作成し、
この共振カーブから最適のタツプを判断するとい
う方法によつていた。そのため、タツプ調整に人
手を要すること、作業が煩雑で多くの時間を要す
ること、また測定中に過電圧が発生して保護リレ
ーを動作させる可能性があること、等の不具合が
ある。この従来のタツプ調整を第１図、第２図を
参照して説明する。第１図において、１は主変圧
器、２は送電線、３は中性点接地抵抗器、４は消
弧リアクトル、５は電圧計、６〜１０はタツプ、
１１〜１３は系統の対地静電容量、２１と２２は
しや断器である。送電線２は一般に多数分岐して
いるが、図では簡略化してある。中性点接地低抗
器３は常時系統に接続されていて事故時のみ切離
される常時併用方式と、常時切離されていて事故
時にのみ接続される常時切離方式とがあるが、常
時併用方式の場合について説明する。まず、系統
構成に変更が生じるとしや断器２２を開放して中
性点接地抵抗器３を系統から切離し、消弧リアク
トル４に印加されている残留電圧を電圧計５によ
つて測定する。次に、しや断器２２を投入して中
性点接地抵抗器３を再び系統に接続し、この状態
でしや断器２１を開放して消弧リアクトル４のタ
ツプを無電圧で１タツプ切換える。しや断器２１
の投入に続いてしや断器２２を開放し、新たなタ
ツプでの残留電圧を再び電圧計５で測定する。こ
のような、測定・操作を繰返してタツプ毎の残留
電圧から第２図に示す如き共振カーブを作り、こ
の共振カーブからあらかじめ定められた幅だけ過
補償タツプ位置の最適タツプ（第２図では７番の
タツプ）を判断し、この最適タツプに切換えて調
整を終える。 Conventionally, this tap adjustment involves creating a resonance curve by repeatedly opening and closing the breaker each time the tap is switched in order to measure the residual voltage for each tap.
The method used was to determine the optimal tap from this resonance curve. Therefore, there are problems such as requiring manual labor to adjust the taps, making the work complicated and taking a lot of time, and overvoltage occurring during measurement, which may cause the protection relay to operate. This conventional tap adjustment will be explained with reference to FIGS. 1 and 2. In Figure 1, 1 is the main transformer, 2 is the transmission line, 3 is the neutral point grounding resistor, 4 is the arc extinguishing reactor, 5 is the voltmeter, 6 to 10 are taps,
11 to 13 are the ground capacitances of the system, and 21 and 22 are bridges and disconnectors. Although the power transmission line 2 generally has many branches, it is simplified in the figure. There are two types of neutral point grounding low resistor 3: one is always connected to the grid and disconnected only in the event of an accident, and the other is the always disconnected type, which is always disconnected and connected only in the event of an accident. The case of this method will be explained. First, when a change occurs in the system configuration, the shield breaker 22 is opened to disconnect the neutral point grounding resistor 3 from the system, and the residual voltage applied to the arc-extinguishing reactor 4 is measured with the voltmeter 5. Next, turn on the shield breaker 22, connect the neutral point grounding resistor 3 to the grid again, open the shield breaker 21 in this state, and press one tap on the arc extinguishing reactor 4 without voltage. Switch. Shiya disconnector 21
Subsequently, the breaker 22 is opened, and the residual voltage at the new tap is measured again with the voltmeter 5. By repeating these measurements and operations, a resonance curve as shown in Fig. 2 is created from the residual voltage of each tap, and from this resonance curve, the optimal tap position of the overcompensated tap is selected by a predetermined width (7 in Fig. 2). the number of taps) and switch to this optimal tap to complete the adjustment.
本発明は上述した従来技術の不具合に鑑み、消
弧リアクトルのタツプ調整を自動的に行うことが
できる消弧リアクトルの自動制御方式を提供する
ことを目的とするものである。 SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, it is an object of the present invention to provide an automatic control system for an arc-extinguishing reactor that can automatically adjust the tap of the arc-extinguishing reactor.
かかる目的を達成するため本発明としては、主
変圧器の中性点に、しや断器を介して消弧リアク
トル接地を施すとともにこれと並列な中性点接地
抵抗を施すものにおいて、上記消弧リアクトルの
タツプ調整時に系統周波数より高い周波数の電力
を補助電源から系統に入力し、この補助電源によ
る電圧と電流を測定し、制御装置にて上記電流と
電圧とに基づき系統の対地静電容量を演算して上
記タツプのインダクタンス調整量を求め、ついで
上記しや断器を開放して上記調整量に基づき上記
タツプを切換え上記しや断器を投入することを特
徴とする。 In order to achieve such an object, the present invention provides an arc-extinguishing reactor grounding to the neutral point of the main transformer via a shield breaker, and a neutral point grounding resistor in parallel. When adjusting the arc reactor tap, power with a frequency higher than the system frequency is input from the auxiliary power source to the system, the voltage and current from this auxiliary power source are measured, and the control device calculates the ground capacitance of the system based on the above current and voltage. The present invention is characterized in that the inductance adjustment amount of the tap is determined by calculating the amount of inductance adjustment of the tap, and then the shield disconnector is opened, the tap is switched based on the adjustment amount, and the shield disconnector is turned on.
ここで、第３図以下を参照して実施例を説明す
る。第３図は本発明の消弧リアクトルの接地系に
ついての等価回路である。第３図中、Ｒは中性点
接地抵抗器の抵抗値、Ｌは消弧リアクトルのリア
クタンス、ｒは消弧リアクトルの抵抗値、Ｃは系
統の静電容量、V〓は後述する補助電源の電圧、I〓
はV〓によつて系統に流入する電流を示す。なお、
Trは主変圧器で、そのリアクタンスは消弧リア
クトルのリアクタンスＬに対し無視できるので表
示だけにとどめる。この等価回路において電圧V〓
と電流I〓を測定して回路のインピーダンスV〓／I〓に
つき計算する。 Here, an embodiment will be described with reference to FIG. 3 and subsequent figures. FIG. 3 is an equivalent circuit for the grounding system of the arc-extinguishing reactor of the present invention. In Figure 3, R is the resistance value of the neutral point grounding resistor, L is the reactance of the arc-extinguishing reactor, r is the resistance value of the arc-extinguishing reactor, C is the capacitance of the system, and V〓 is the auxiliary power supply described later. Voltage, I〓
represents the current flowing into the system due to V〓. In addition,
Tr is the main transformer, and its reactance can be ignored compared to the reactance L of the arc-extinguishing reactor, so it is only shown here. In this equivalent circuit, the voltage V〓
Measure the current I〓 and calculate the circuit impedance V〓/I〓.
Ｖ、Ｉを測定して(1)式より静電容量が求まる。 Measure V and I and find the capacitance from equation (1).
Ｃ＝１−ｒ／ωL×Ｂ／Ａ−Ｒ／ω2L＋r2／Ｌ…
…(2)
(2)式から共振点となる消弧リアクトルのインダ
クタンスは(3)式となる。 C=1-r/ωL×B/A-R/ ω2L + r2 /L...
...(2) From equation (2), the inductance of the arc-extinguishing reactor, which is the resonance point, is given by equation (3).
LD＝１／ω0 2C （ω0は系統の角周波数） ……(3)
第４図は上述のＶ、Ｉ測定とインダクタンス
LDを求める演算・制御を実施するための回路構
成である。第４図において、第１図と同一部分に
は同一符号を付す。主変圧器１の中性点にはしや
断器２１を介して消弧リアクトル４が接地されて
いるとともに、このしや断器２１および消弧リア
クトル４と並列して、しや断器２２、中性点接地
抵抗器３、変流器１４、および補助トランス１５
の二次巻線が直列に接続され接地している。ま
た、変流器１４と補助トランス１５の二次巻線を
バイパスして短絡スイツチ１６が挿入されてい
る。変流器１４の二次側は制御装置１７に接続さ
れている。補助トランス１５の一次巻線は保護装
置１８と補助電源１９との並列回路に接続されて
いる。制御装置１７の出力は消弧リアクトル４の
タツプ切換装置４ａに接続されている。L D = 1/ω 0 2 C (ω 0 is the angular frequency of the system) ...(3) Figure 4 shows the above-mentioned V and I measurements and inductance.
This is a circuit configuration for performing calculations and control to obtain LD . In FIG. 4, the same parts as in FIG. 1 are given the same reference numerals. An arc-extinguishing reactor 4 is grounded to the neutral point of the main transformer 1 via a shield breaker 21, and a shield breaker 22 is connected in parallel with the shield breaker 21 and the arc-extinguishing reactor 4. , neutral point grounding resistor 3, current transformer 14, and auxiliary transformer 15
The secondary windings of are connected in series and grounded. Further, a short circuit switch 16 is inserted to bypass the secondary windings of the current transformer 14 and the auxiliary transformer 15. The secondary side of current transformer 14 is connected to control device 17 . The primary winding of the auxiliary transformer 15 is connected to a parallel circuit of a protection device 18 and an auxiliary power source 19. The output of the control device 17 is connected to the tap switching device 4a of the arc extinguishing reactor 4.
補助電源１９の発生電力は系統の残留電圧の干
渉をさけ調整すべき消弧リアクトル４のインダク
タンスLDを求めるため系統周波数とは異なる
（高い）周波数を有する。また、保護装置１８は
対地静電容量の測定中すなわち補助電源１９が投
入されて制御装置１７で電圧、電流を測定中、送
電線２に地絡事故が生じたとき系統周波数の電
圧・電流およびサージ電圧が補助電源１９に侵入
するのを防止するためのものである。したがつ
て、保護装置１８は補助電源１９からの電圧では
作動せず、それ以上の電圧の印加にて短絡するよ
うに構成される。短絡スイツチ１６は消弧リアク
トル４のタツプ調整作業以外の時に常に中性点接
地抵抗器３を直接に接地するためのものであり、
また調整作業時開放されていても主回路の地絡事
故により直ちに投入されるようになつている。 The power generated by the auxiliary power source 19 has a frequency different (higher) than the system frequency in order to obtain the inductance L D of the arc-extinguishing reactor 4, which should be adjusted to avoid interference of residual voltage in the system. The protective device 18 also protects the system frequency voltage and current when a ground fault occurs in the power transmission line 2 while the ground capacitance is being measured, that is, when the auxiliary power supply 19 is turned on and the control device 17 is measuring the voltage and current. This is to prevent surge voltage from entering the auxiliary power supply 19. Therefore, the protection device 18 is configured such that it does not operate under the voltage from the auxiliary power source 19, and is short-circuited when a higher voltage is applied. The short-circuit switch 16 is used to directly ground the neutral point grounding resistor 3 at all times other than when adjusting the tap of the arc-extinguishing reactor 4.
Furthermore, even if it is opened during adjustment work, it is immediately turned on in the event of a ground fault in the main circuit.
つぎに、制御装置１７の構成を第５図にて説明
する。短絡スイツチ１６の開放により補助電源１
９が投入され、補助トランス１５の巻線間に補助
電源１９による電圧が生じる。この電圧は制御装
置１７に入力されると共に変流器１４を介して電
流が制御装置１７に入力される。制御装置１７で
はこの電圧、電流に対してそれぞれレベル変換部
１７ａ，１７ｐ、系統周波数と測定周波数とを選
別するフイルタ１７ｂ，１７ｑ、後段のマイクロ
プロセツサからのタイミングに係るサンプルホー
ルド回路１７ｃ，１７ｒ、が存在し、ついでサン
プルホールドされた電圧・電流を個別にＡ／Ｄ変
換器１７Ｙに出力するマルチプレクサ１７Ｘ、
Ａ／Ｄ変換された電圧、電流値を演算処理するマ
イクロプロセツサ１７Ｚを有する。そして、この
マイクロプロセツサ１７Ｚは操作部１７Ｍにより
自動または手動で操作され、前述した(3)式のLD
を求める演算とともに第６図に示す制御を実行す
る。 Next, the configuration of the control device 17 will be explained with reference to FIG. The auxiliary power supply 1 is disconnected by opening the short-circuit switch 16.
9 is turned on, and a voltage is generated between the windings of the auxiliary transformer 15 by the auxiliary power supply 19. This voltage is input to the control device 17, and a current is input to the control device 17 via the current transformer 14. The control device 17 includes level converters 17a and 17p for the voltage and current, filters 17b and 17q for selecting the system frequency and measurement frequency, sample and hold circuits 17c and 17r for timing from the subsequent microprocessor, and a multiplexer 17X, which then outputs the sampled and held voltages and currents individually to the A/D converter 17Y;
It has a microprocessor 17Z that performs arithmetic processing on A/D converted voltage and current values. This microprocessor 17Z is automatically or manually operated by the operation section 17M, and the L D of the above-mentioned equation (3) is
The control shown in FIG. 6 is executed together with the calculation to obtain the following.
第６図においては、マイクロプロセツサ１７Ｚ
による制御のフローチヤートを示しており、操作
部１７Ｍからの手動指令により又は系統切替えに
よる自動指令によりプログラムが実行される。ま
ず、短絡スイツチ１６が開放されると補助電源１
９が作動される。この投入により第５図の制御装
置１７に補助電源１９の電圧Ｖ、電流Ｉが取込ま
れ前述のインダクタンスLDが求められる。この
結果、消弧リアクトル４のタツプ切替が必要な場
合、しや断器２１が開放されてタツプ切替装置４
ａ内で自動タツプ切替が行なわれる。ついで、切
替完了後しや断器２１が投入され、適正タツプの
切替にて補助電源１９の作動が停止される。そし
て、短絡スイツチ１６の投入により切替作業が終
了する。 In FIG. 6, the microprocessor 17Z
The program is executed by a manual command from the operation unit 17M or by an automatic command by system switching. First, when the short circuit switch 16 is opened, the auxiliary power supply 1
9 is activated. By this turning on, the voltage V and current I of the auxiliary power supply 19 are taken into the control device 17 shown in FIG. 5, and the above-mentioned inductance L D is determined. As a result, when tap switching of the arc extinguishing reactor 4 is required, the arc breaker 21 is opened and the tap switching device 4 is opened.
Automatic tap switching takes place within a. Then, after the switching is completed, the breaker 21 is turned on, and the operation of the auxiliary power source 19 is stopped by switching the appropriate tap. Then, the switching operation is completed by turning on the short circuit switch 16.
以上実施例にて説明したように本発明によれ
ば、消弧リアクトルのタツプ切替に際してタツプ
切替を自動化することができるので従来のように
タツプ調整に人手を要せず簡単な作業で短時間に
調整が可能となり、しや断器の操作回数が少ない
ので保守点検作業の省力化が可能となり、また従
来のように測定に際して中性点接地抵抗器を開放
する必要がないため消弧リアクトル特有の過電圧
の発生がない。また、測定中の地絡事故に対して
はバイパス回路が形成されるため安全であるなど
多大な効果を奏する。 As explained above in the embodiments, according to the present invention, tap switching can be automated when switching the taps of the arc extinguishing reactor, so the tap adjustment can be done easily and in a short time without requiring manual labor as in the past. Adjustment is possible, and the number of operations of the breaker is reduced, making it possible to save labor in maintenance and inspection work.In addition, there is no need to open the neutral point earthing resistor when making measurements, which is unique to arc-extinguishing reactors. No overvoltage occurs. Furthermore, since a bypass circuit is formed in case of a ground fault during measurement, it is safe and has great effects.
第１図および第２図は従来の消弧リアクトルの
タツプ調整を説明するためのもので、第１図は回
路図、第２図は測定時の残留電圧とタツプとの関
係を示すグラフ、第３図ないし第６図は本発明に
よる消弧リアクトルの自動制御方式の実施例で、
第３図はインダクタンス算出のための等価回路
図、第４図は自動制御系全体の簡略回路図、第５
図は制御装置の一例のブロツク図、第６図はタツ
プ調整の手順を示すフローチヤートである。
図面中、１は主変圧器、３は中性点接地抵抗
器、４は消弧リアクトル、１７は制御装置、１９
は補助電源である。
Figures 1 and 2 are for explaining the tap adjustment of a conventional arc-extinguishing reactor. Figure 1 is a circuit diagram, Figure 2 is a graph showing the relationship between residual voltage and tap during measurement, and Figures 3 to 6 show embodiments of the automatic control system for arc-extinguishing reactors according to the present invention.
Figure 3 is an equivalent circuit diagram for calculating inductance, Figure 4 is a simplified circuit diagram of the entire automatic control system, and Figure 5 is a simplified circuit diagram of the entire automatic control system.
The figure is a block diagram of an example of the control device, and FIG. 6 is a flowchart showing the tap adjustment procedure. In the drawing, 1 is a main transformer, 3 is a neutral point grounding resistor, 4 is an arc extinguishing reactor, 17 is a control device, 19
is an auxiliary power source.
Claims (1)
リアクトル接地を施すとともにこれと並列な中性
点接地抵抗を施すものにおいて、上記消弧リアク
トルのタツプ調整時に系統周波数より高い周波数
の電力を補助電源から系統に入力し、この補助電
源による電圧と電流を測定し、制御装置にて上記
電流と電圧とに基づき系統の対地静電容量を演算
して上記タツプのインダクタンス調整量を求め、
ついで上記しや断器を開放して上記調整量に基づ
き上記タツプを切換え上記しや断器を投入するこ
とを特徴とする消弧リアクトルの自動制御方式。1 In the case where the neutral point of the main transformer is grounded to the arc extinguishing reactor via a breaker, and a neutral point grounding resistor is applied in parallel with this, when the tap of the arc extinguishing reactor is adjusted, the frequency is higher than the system frequency. Input frequency power into the system from the auxiliary power supply, measure the voltage and current from this auxiliary power supply, and use the control device to calculate the ground capacitance of the system based on the above current and voltage, and adjust the inductance adjustment amount of the above tap. seek,
An automatic control system for an arc-extinguishing reactor, characterized in that the above-mentioned capacitance breaker is then opened, the tap is switched based on the above-mentioned adjustment amount, and the capacitor breaker is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7411781A JPS57189518A (en) | 1981-05-19 | 1981-05-19 | Automatic control system for arc extinguishing reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7411781A JPS57189518A (en) | 1981-05-19 | 1981-05-19 | Automatic control system for arc extinguishing reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57189518A JPS57189518A (en) | 1982-11-20 |
| JPS6347055B2 true JPS6347055B2 (en) | 1988-09-20 |
Family
ID=13537936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7411781A Granted JPS57189518A (en) | 1981-05-19 | 1981-05-19 | Automatic control system for arc extinguishing reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57189518A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4892914B2 (en) * | 2005-09-30 | 2012-03-07 | 東京電力株式会社 | Charging current measuring method and charging current measuring program |
| JP5419079B2 (en) * | 2009-06-30 | 2014-02-19 | 一般財団法人電力中央研究所 | Tap setting method of arc extinguishing reactor, tap setting device thereof, and tap setting program thereof |
| CN105702418A (en) * | 2015-12-09 | 2016-06-22 | 国家电网公司 | Magnetic flux control-based adjustable reactor |
-
1981
- 1981-05-19 JP JP7411781A patent/JPS57189518A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57189518A (en) | 1982-11-20 |
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