DE597309C - Device for regulating reactive power by means of reactive resistors connected in parallel to the AC line - Google Patents
Device for regulating reactive power by means of reactive resistors connected in parallel to the AC lineInfo
- Publication number
- DE597309C DE597309C DEA55029D DEA0055029D DE597309C DE 597309 C DE597309 C DE 597309C DE A55029 D DEA55029 D DE A55029D DE A0055029 D DEA0055029 D DE A0055029D DE 597309 C DE597309 C DE 597309C
- Authority
- DE
- Germany
- Prior art keywords
- reactive power
- parallel
- frequency
- reactive
- regulating
- 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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
-
- 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
-
- 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)
- Supply And Distribution Of Alternating Current (AREA)
Description
DEUTSCHES REICHGERMAN EMPIRE
AUSGEGEBEN AM 22. MAI 1934ISSUED ON May 22, 1934
REICHSPATENTAMTREICH PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
KLASSE 21 d 2 GRUPPE 42CLASS 21 d 2 GROUP 42
Allgemeine Elektricitäts-Gesellschaft in Berlin*)General Electricity Society in Berlin *)
Patentiert im Deutschen Reiche vom 11. August 1928 abPatented in the German Empire on August 11, 1928
In vielen Fällen wird eine regelbare Blindleistung verlangt, z. B. zur Regelung der Spannung
in Wechselstromnetzen. Bekannte Regeleinrichtungen bestehen darin, Blindstrommaschinen
aufzustellen, Drosselspulen oder Kondensatoren zu- und abzuschalten oder beliebige
Kombinationen von Parallel- oder Reihenschaltungen dieser Apparate vorzunehmen.
Es ist auch schon vorgeschlagen worden, die Blindleistung in der Weise zu regem, daß über
Frequenzwandler an das Netz angeschlossene Blindwiderstände mit Wechselstrom veränderlicher
Frequenz betrieben werden. In Abb. 1 ist eine derartige Einrichtung dargestellt.In many cases, controllable reactive power is required, e.g. B. to regulate the voltage in AC networks. Known regulating devices consist in setting up reactive current machines, switching inductors or capacitors on and off or making any combination of parallel or series connections of these devices.
It has also already been proposed to stimulate the reactive power in such a way that reactive resistors connected to the network are operated with alternating current of variable frequency via frequency converters. Such a device is shown in Fig. 1.
ι bedeutet das Wechselstromnetz, dessen Blindleistung geregelt werden soll, 2 ist der Blindwiderstand. Er ist über den Frequenzwandler 3 mit dem Netz verbunden. Der Frequenzwandler 3 liefert eine Spannung veränderlicher Frequenz. Für die Frequenzregelung sind alle bekannten Einrichtungen verwendbar, z. B. Elektronenröhren, deren Frequenz durch Gitter gesteuert wird, mit Gleichoder Wechselstrom erregte Wechselstromumformmaschinen mit regelbarer Drehzahl und Eigen- oder Fremdantrieb.ι means the alternating current network whose reactive power is to be regulated, 2 is the Reactance. It is connected to the network via the frequency converter 3. The frequency converter 3 supplies a voltage of variable frequency. For frequency control all known facilities can be used, e.g. B. Electron tubes, their frequency controlled by grids, AC converting machines excited by direct or alternating current with adjustable speed and internal or external drive.
Will man mit einem bestimmten Frequenzhereich des Frequenzwandlers einen möglichst weitgehenden Regelbereich erhalten, so wird erfindungsgemäß der Blindwiderstand aus Drosseispulen und parallel dazu geschalteten Kondensatoren gebildet, die über den gleichen Frequenzwandler gespeist werden. Da bei einer solchen Parallelschaltung die Charakteristik des Stromes in Abhängigkeit von der Frequenz wesentlich steiler verläuft als bei reiner Drosselspulenschaltung, genügt schon eine geringe Frequenzänderung, um eine große Änderung der Blindleistung zu erhalten. Eine derartige Schaltung gemäß der Erfindung ist in Abb. 2 dargestellt, wo mit 4 die zu den Drosselspulen 2 parallel geschalteten Kondensatoren bezeichnet sind. Eine solche Schaltung eignet sich besonders in solchen Fällen, wo gelegentlich auch kapazitive Blindleistung verbraucht werden soll. Die Größen der beiden Blindwiderstände sind erfindungsgemäß so zu bemessen, daß bei einer innerhalb des Regelbereiches des Frequenzwandlers liegenden Resonanzfrequenz besteht, so daß keine Blindleistung in bezug auf das Netz aufgenommen oder abgegeben wird. In diesem Falle verhält sich die Einrichtung so, als ob sie ausgeschaltet wäre. Erhöht man jedoch die Frequenz über die Resonanzfrequenz, so gibt der Regler Blindleistung ab; umgekehrt verbraucht er Blindleistung bei Frequenzerniedri-If you want one with a certain frequency range of the frequency converter, if possible Obtain a large control range, according to the invention, the reactance is made up of inductor coils and capacitors connected in parallel are formed via the same frequency converter be fed. Because with such a parallel connection the characteristic of the current depends on the frequency runs much steeper than with a pure choke coil circuit, even a small one is sufficient Frequency change to get a large change in reactive power. Such a one Circuit according to the invention is shown in Fig. 2, where with 4 the to the choke coils 2 capacitors connected in parallel are designated. Such a circuit is particularly suitable in those cases where capacitive reactive power is to be used occasionally. The sizes of the two reactive resistances are to be dimensioned according to the invention so that with one there is a resonance frequency within the control range of the frequency converter, so that no reactive power with respect to the network is taken up or released. In this Trap, the device behaves as if it were switched off. But if you increase the Frequency above the resonance frequency, the controller outputs reactive power; conversely consumed he reactive power at frequency lower
*) Von dem Patentsucher ist als der Erfinder angegeben worden:*) The patent seeker stated as the inventor:
Richard. Tröger in Berlin-Zehlendorf.Richard. Tröger in Berlin-Zehlendorf.
597 S09597 S09
gung. Die Einrichtung arbeitet also doppelt wirkend.supply. The device therefore works double-acting.
Die Wirkung einer solchen doppelt wirkenden Regeleinrichtung nach Abb. 2 sei an Hand eines Zahlenbeispieles erläutert. Ein Kondensator, welcher z. B. bei 50 Hertz und Nennspannung 100 BkW erzeugt, liefert bei 100 Hertz 200 BkW, bei 25 Hertz 50 BkW. Die Drosselspule verbraucht bei Resonanzfrequenz gerade die Blindleistung des Kondensators, also z. B. bei 50 Perioden gerade 100 BkW. Bei 100 Hertz würde die Drosselspule 50 BkW, bei 25 Hertz 200 BkW verbrauchen. Der doppelt wirkende Regler (Abb. 2) würde bei 50 Hertz, wenn diese die Resonanzfrequenz ist, weder Blindleistung erzeugen, noch verbrauchen; mithin für das Netz wirkungslos sein. Bei 100 Hertz würde er eine Blindleistung von 100 BkW (200 bis 50) abgeben, bei 25 Hertz dagegen 150 BkW (50 bis 200) verbrauchen. Der doppelt wirkende Regler der Abb. 2 gestattet neben einer Beschleunigung des Regelvorganges auch noch den Nulldurchgang und die Umkehr des Blindenergieflusses ohne jeden Schaltvorgang, lediglich durch Regelung der Frequenz.The effect of such a double-acting control device according to Fig. 2 is based on one Numerical example explained. A capacitor which z. B. at 50 Hertz and nominal voltage 100 BkW generates, at 100 Hertz delivers 200 BkW, at 25 Hertz 50 BkW. The choke coil is consumed at resonance frequency just the reactive power of the capacitor, so z. B. at 50 periods just 100 BkW. At 100 Hertz the choke coil would be 50 BkW, at 25 Hertz 200 BkW consume. The double-acting regulator (Fig. 2) would work at 50 Hertz if this were the Resonance frequency is, neither generate nor consume reactive power; therefore for the network be ineffective. At 100 Hertz it would give a reactive power of 100 BkW (200 to 50), at 25 Hertz, on the other hand, use 150 BkW (50 to 200). The double acting regulator Fig. 2 allows not only an acceleration of the control process, but also the zero crossing and the reversal of the reactive energy flow without any switching process, just through Regulation of the frequency.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA55029D DE597309C (en) | 1928-08-11 | 1928-08-11 | Device for regulating reactive power by means of reactive resistors connected in parallel to the AC line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA55029D DE597309C (en) | 1928-08-11 | 1928-08-11 | Device for regulating reactive power by means of reactive resistors connected in parallel to the AC line |
Publications (1)
Publication Number | Publication Date |
---|---|
DE597309C true DE597309C (en) | 1934-05-22 |
Family
ID=6939790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA55029D Expired DE597309C (en) | 1928-08-11 | 1928-08-11 | Device for regulating reactive power by means of reactive resistors connected in parallel to the AC line |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE597309C (en) |
-
1928
- 1928-08-11 DE DEA55029D patent/DE597309C/en not_active Expired
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