DE334979C - High-voltage long-distance line with built-in inductors to compensate for the capacitive charging current - Google Patents
High-voltage long-distance line with built-in inductors to compensate for the capacitive charging currentInfo
- Publication number
- DE334979C DE334979C DE1919334979D DE334979DD DE334979C DE 334979 C DE334979 C DE 334979C DE 1919334979 D DE1919334979 D DE 1919334979D DE 334979D D DE334979D D DE 334979DD DE 334979 C DE334979 C DE 334979C
- Authority
- DE
- Germany
- Prior art keywords
- inductors
- voltage
- charging current
- built
- choke coil
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
-
- 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
- Y02E40/30—Reactive power compensation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Description
Hochspannungs-Fernleitung mit zur Kompensation des kapazitiven Ladestromes eingebauten Drösselspulen. Hochspannungs-Fernleitungen besitzen einen voreilenden Ladestrom, da die Leitungen gegeneinander und gegen Erde einen Kondensator darstellen. Dieser voreilende Strom verursacht in den Maschinen und in der Leitung eine Spannungserhöhung, die bei sehr großen Leitungslängen einen unzulässigen Wert annehmen kann. Er läßt sich dadurch beseitigen, daß an geeigneten Stellen der Leitung Drosselspulen eingebaut werden, die ganz oder teilweise dem Laststromkreis parallel liegen. Der von diesen Drosselspulen aufgenommene nacheilende Strom kompensiert alsdann den voreilenden Ladestrom. . Wird nun die Leitung an irgendeinem Punkte belastet, so erzeugt der Laststrom, der in fast allen Fällen ebenfalls nacheilend sein wird, einen Spannungsabfall. Würde man also Drosselspulen in der angegebenen Weise einbauen, so hätte man zwar bei Leerlauf die Spannungserhöhung vermieden, dafür aber bei Belastung einen erhöhten Spannungsabfall mit in Kauf zu nehmen. Außerdem würde die bei Belastung sehr erwünschte Wirkung des Ladestromes, nämlich die Verbesserung des Phasenverschiebungswinkels, aufgehoben sein. Um diese nachteiligeWirkung desLaststromes,oder dochwenigstens der nacheilenden Komponente des Laststromes, etwas auszugleichen, soll daher erfindungsgemäß der induktive Äompensationsstrom mit wachsender Last herabgesetzt werden.High-voltage long-distance line to compensate for the capacitive charging current built-in throttle coils. High-voltage transmission lines have a leading one Charging current, since the lines against each other and against earth represent a capacitor. This leading current causes a voltage increase in the machines and in the line, which can assume an impermissible value with very long cable lengths. He let eliminate themselves by installing inductors at suitable points on the line that are wholly or partially parallel to the load circuit. The one of these The lagging current picked up by inductors then compensates for the leading one Charging current. . If the line is now loaded at any point, the generated Load current, which will also be lagging in almost all cases, a voltage drop. If you were to install inductors in the manner indicated, you would have The voltage increase avoided when idling, but an increased one when under load Accept a voltage drop. In addition, the one would be very desirable under stress Effect of the charging current, namely the improvement of the phase shift angle, be lifted. About this adverse effect of the load current, or at least the lagging component of the load current to compensate somewhat, is therefore according to the invention the inductive compensation current can be reduced as the load increases.
Die Zeichnung veranschaulicht einige für diesen Zweck verwendbare Schaltungen. Dabei ist durchweg vorausgesetzt, daß es sich um den besonderen in Betracht kommenden Fall einer Drehstrom-Fernleitung handelt. Selbstver- i ständlich lassen sich entsprechende Schaltungen aber auch für andere Fälle, also beispielsweise für - Einphäsenwechselstrom, treffen.The drawing illustrates some that can be used for this purpose Circuits. It is always assumed that it is the special in The case under consideration is a three-phase power transmission line. Of course however, corresponding circuits can also be used for other cases, for example for - single phase alternating current, meet.
Nach Fig. z zunächst ist die Drosselspule Dr mit Anzapfungen versehen, an denen der Laststromkreis abgezweigt ist, so daß ein Teil der Drosselspule mit dem Laststromkreis in Reihe, der andere parallel dazu liegt. Die Drosselspule wird infolgedessen teilweise von dem Laststrom durchflossen und die wattlose Komponente des Laststromes stellt einen Teil der notwendigen Erreger-Amperewindungen der Drosselspule, so daß die außerdem noch von der Drosselspule benötigten nacheilenden Erreger-Amperewindungen vermindert werden.According to Fig. Z, first of all, the choke coil Dr is provided with taps, where the load circuit is branched, so that part of the inductor with the load circuit in series, the other in parallel. The reactor will As a result, the load current partially flows through it and the wattless component of the load current represents part of the necessary excitation ampere-turns of the inductor, so that the trailing exciter ampere turns also required by the choke coil be reduced.
Fig.2 zeigt insofern eine etwas andere Schaltung, als dort getrennte Drosselspulen Drl und Dy, verwendet werden, die hintereinander geschaltet sind und zwischen denen die Abzweigung des Laststromes stattfindet. An der Wirkung wird dadurch gegenüber der Fig. z nichts Grundsätzliches geändert, jedoch ergibt die Trennung der Drosselspulen außer wickeltechnischen Vorteilen die Möglichkeit, die Charakteristiken der beiden Drosselspulen, z. B. durch Änderung ihrer Sättigung, im Normalfelde gegeneinander verschieden zu machen.2 shows a somewhat different circuit, as there are separate ones Choke coils Drl and Dy are used, which are connected in series and between which the branching of the load current takes place. The effect is thereby compared to FIG. Z nothing fundamentally changed, but results in the separation the choke coils apart from the technical advantages of winding the possibility of the characteristics of the two inductors, e.g. B. by changing their saturation, in normal fields against each other to make different.
In der Fig. 3 wird die Last unmittelbar im Netz abgenommen und die ganze Drosselspule liegt also dem Laststromkreis parallel. Die Herabsetzung des induktiven Kompensationsstromes erfolgt dabei durch eine besondere Regelvorrichtung R, die von Hand oder selbsttätig in der Art verstellt wird, daß sie die nacheilenden Amperewindungen der Drosselspule bei Belastung verringert, bei Leerlauf dagegen erhöht.In Fig. 3, the load is removed directly in the network and the The entire choke coil is therefore parallel to the load circuit. The degradation of the inductive compensation current is carried out by a special control device R, which is adjusted by hand or automatically in such a way that it is the lagging Ampere turns of the inductor reduced under load, at idle on the other hand increased.
Die Sternpunkte der Drosselspulen sind in allen drei Fällen geerdet. Das ist aus betriebstechnischen Gründen zweckmäßig, jedoch kein unbedingtes Erfordernis.The neutral points of the reactors are earthed in all three cases. This is useful for operational reasons, but not an absolute requirement.
Bei einer Schaltung nach Fig. 3 läßt sich die Drosselspule Dy gleichzeitig verwenden, um beim Zusammenschalten zweier Netzpunkte mit großem Spannungsabfall und starker Phasenverschiebung die Stromstöße auf die Erzeugermaschinen zu vermindern.In a circuit according to FIG. 3, the choke coil Dy can be simultaneously use when connecting two network points with a large voltage drop and strong phase shift to reduce the power surges on the generating machines.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE334979T | 1919-08-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE334979C true DE334979C (en) | 1921-03-26 |
Family
ID=6218813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1919334979D Expired DE334979C (en) | 1919-08-03 | 1919-08-03 | High-voltage long-distance line with built-in inductors to compensate for the capacitive charging current |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE334979C (en) |
-
1919
- 1919-08-03 DE DE1919334979D patent/DE334979C/en not_active Expired
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