WO2000017981A1 - Power supply device for protective devices for switchgear - Google Patents
Power supply device for protective devices for switchgear Download PDFInfo
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- WO2000017981A1 WO2000017981A1 PCT/DE1999/003091 DE9903091W WO0017981A1 WO 2000017981 A1 WO2000017981 A1 WO 2000017981A1 DE 9903091 W DE9903091 W DE 9903091W WO 0017981 A1 WO0017981 A1 WO 0017981A1
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- protective
- charging
- voltage
- switchgear
- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
- H02H1/063—Arrangements for supplying operative power primary power being supplied by fault current
Definitions
- the invention relates to an energy supply device for protective devices of switchgear, in particular for medium-voltage switchgear, with a protective switch after a bridge rectifier and one after charging a charging capacitor
- Protection device actively switched, short-circuiting the voltage supply lines, control device.
- the protective devices are represented here by so-called overcurrent releases, which contain a release magnet and a release circuit with an output for emitting a release signal.
- the trigger signal acts directly on a shutdown device which, in order to limit the damage, immediately prevents the supply of energy supply and distribution.
- the protection devices are supplied with energy via an energy supply device which is fed directly from the energy supply network.
- converter devices are used in a known manner, the correspondingly reduced conductor currents of which generate a DC voltage by means of a bridge rectifier device. The DC voltage is set to a setpoint with a voltage regulator, with which the charging capacitor in the protective device is charged immediately.
- the power supply devices of these protective devices require, on the one hand, an ter the most diverse operating conditions safe charging of the charging capacitor and on the other hand, the full capacity of the charging capacitor must be ensured in a very short time in order to be able to interrupt the power supply very quickly in the event of faults, for example in the event of electrical short-circuits.
- This switching process requires high power losses for the components arranged in the short circuit due to the short circuit.
- the object on which the invention is based is to achieve the conditions required in this technology with less expenditure on switching means with considerably lower power losses and to ensure the availability of the full capacitance of the charging capacitor at all times under all operating conditions of the switchgear. According to the invention, this is achieved by features 1.1.
- the protective switching device contains a bidirectionally controllable thyristor circuit with a series resistor connected in series. 1.2 the thyristor circuit is under the control of an arrester which ignites when the holding current is exceeded,
- control device is realized by a current flow the voltage-carrying lines to the charging of the charging capacitor ⁇ the protective device interrupting longitudinal regulating device,
- the bridge rectifier device is bridged on the DC side by a high-voltage capacitor.
- the wire cross-section of the secondary-side converter device in the power supply device according to the invention is designed for the average load current. Only the dielectric strength of the wire is to be dimensioned such that it is above the ignition voltage of the conductor.
- the high-loss energy supply devices previously designed according to the known low-voltage concept are therefore replaced by low-loss energy supply devices according to the known high-voltage concept.
- the seconds The overload-side converter device and the bridge rectifier device are overloaded by the high-voltage capacitor, which can then assume voltage values in the range of several 100 volts.
- the features are 2.1 the longitudinal control device is formed from a fast-acting analog controller and a low-loss switching stage controller, 2.2 the analog controller and the switching stage controller are functionally decoupled by decoupling diodes, 3.3 the longitudinal control device is controllable in such a way that in a first time period The charging capacitor is charged exclusively by the analog controller and is then taken over entirely by the switching stage controller at the beginning of a second period.
- the transistor switch of the series regulating device is under the control influence of the optocoupler arranged in the cathode branch of the shunt regulator in such a way that the output current when the circuit breaker is switched in the event of a short circuit leads to the safe tripping thereof.
- the analog controller immediately takes over the feed for the charging capacitor of the protective device. Since the generated output voltage is slightly below the nominal output voltage, the switching stage controller can be switched on practically without load in a short time swing. After the switching stage controller has fully settled, the analog controller is put out of operation by the shunt controller turning on and thus the optocoupler short-circuiting the gate-source path of the transistor switch.
- the analog controller with a higher power loss balance in the first time period is thus replaced by the switching stage controller which is effective only in the second time period and has a significantly reduced power loss.
- the combination of a fast-settling analog controller with a relatively high power loss and a switching stage controller with a correspondingly lower power loss, which becomes effective with a time delay, can also be used generally to reduce power losses overall, regardless of the power supply to protective devices.
- the longitudinal control device is equipped with a charging current limiting circuit in front.
- FIG. 1 depicting the prior art which has been customary up to now in the basic circuit diagram
- FIG. 2 showing the energy supply device according to the invention in the basic circuit diagram
- FIG. 3 representing a preferred embodiment of the energy supply device according to FIG.
- FIG. 1 shows the basic structure of the known energy supply devices, which essentially consist of a bridge rectifier device BG and the voltage supply lines after the charging process has been completed short-circuiting control device KR are formed with the transistor switch TK. Between the converter device V.' ⁇ and the bridge rectifier device BG, a protective switching device SE is provided, with which the components are protected against the effects of high induced induction voltages in the event of network short-circuits.
- the charging capacitor CL of the protective device SG is charged in such a way that the protective device SG immediately interrupts the energy supply in the faulty power supply unit in the event of network short-circuits by means of switching contacts (not shown).
- FIG. 2 shows the energy supply device according to the invention with its essential functional elements, likewise in a simplified basic illustration.
- the short-circuiting control device KR (FIG. 1) is replaced by the longitudinal control device LR.
- the longitudinal regulating device LR is equipped with the transistor switch TU which interrupts the line for the voltage supply and which is controlled by the action of the shunt regulator SR.
- the bridge rectifier device BG is bridged on the DC side by the high-voltage capacitor CH, which in the case of the blocking transistor switch TU is charged to a voltage value of several 100 volts.
- the converter device WE is only burdened here during the charging process and is otherwise unloaded. Accordingly, the bridge rectifier device BG and the transistor switch TU are loaded only by an average load current of the converter device.
- the protective switching device SE here contains a bidirectionally controllable thyristor circuit TH, which is connected in series with a series resistor RV to limit the current.
- the thyristor circuit TR is under the control influence of the conductor AL, which ignites when the holding current of the thyristor circuit TH is exceeded. Here, too, will be on the Lär ' .
- the output voltage UA applied to the control device is ultimately charged by the charging capacitor CL of the protective device SG to the required voltage value.
- FIG. 3 shows further details of the energy supply device according to the invention according to FIG. 2 in a preferred embodiment, in which only the components necessary for understanding are also shown and labeled or only indicated.
- the longitudinal control device LR essentially consists of the analog controller AN and the switching stage controller RS.
- the transistor switch TS is under the control influence of the optocoupler OK, which is arranged directly in the cathode branch of the shunt regulator SR.
- the optocoupler OK becomes so effective that an admissibly limited voltage value is established as the output voltage UA.
- the longitudinal control device LR also contains the switching stage controller RS.
- the switching stage controller RS and the analog controller AN are functionally decoupled from one another within the longitudinal control device LR by the decoupling diodes EDI, 2, so that defined functional sequences for the charging processes can take place. Since the start of the charging process is initially carried out exclusively by the analog controller AN, the switching stage controller SR can be used with its
- Swing gear shift device SS load-free and be in a steady state in a very short time. Then the shunt controller SR is controlled by the switching stage controller SR and the gate-source Route of the transistor switch TS with the conductive transistor T short-circuited.
- the charging current for the charging capacitor CL of the protective device SG is limited to a permissible value.
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Abstract
Description
Beschreibungdescription
Energieversorgungseinrichtung für Schutzgeräte von SchaltanlagenEnergy supply device for protective devices of switchgear
Die Erf indung betrifft eine Energieversorgungseinrichtung für Schutzgeräte von Schaltanlagen, insbesondere für Schaltanlagen der Mittelspannungstechnik, mit einer Schutzschalteinrichtung nach geschalteten Brückengleichrichtereinrichtung und einer nach der Aufladung eines Ladekondensators desThe invention relates to an energy supply device for protective devices of switchgear, in particular for medium-voltage switchgear, with a protective switch after a bridge rectifier and one after charging a charging capacitor
Schutzgerätes aktiv geschalteten, die spannungszuführenden Leitungen kurzschließenden, Regeleinrichtung .Protection device actively switched, short-circuiting the voltage supply lines, control device.
Eine Energieversorgungseinrichtung der eingangs definierten Art ist vom prinzipiellen Aufbau weitestgehend durch dieThe basic structure of an energy supply device of the type defined at the outset is largely due to the
EP 0 136 254 Bl bekannt . Die Schutzgeräte sind hier durch sogenannte Überstromauslöser repräsentiert, die einen Auslösemagneten und eine Auslöseschaltung mit einem Ausgang zur Abgabe eines Auslösesignals enthalten . Das Auslösesignal wirkt im Falle eines Überstromes in einer der Phasenleitungen zur Last-Energieversorgung und -Verteilung direkt auf eine Abschaltvorrichtung ein, die zur Schadensbegrenzung die Zuführung der Energieversorgung und -Verteilung unmittelbar unterbindet . Die Energieversorgung der Schutzgeräte erfolgt dabei über eine Energieversorgungseinrichtung, die direkt aus dem Energieversorgungsnetz gespeist ist . Hierzu sind in bekannter Weise Wandlereinrichtungen eingesetzt, deren entsprechend reduzierte Leiterströme mittels einer Brückengleichrichtereinrichtung eine Gleichspannung erzeugen. Die Gleichspannung wird mit einen Spannungsregler auf einen Sollwert eingestellt, mit dem unmittelbar die Aufladung eines Ladekondensators im Schutzgerät erfolgt .EP 0 136 254 B1 known. The protective devices are represented here by so-called overcurrent releases, which contain a release magnet and a release circuit with an output for emitting a release signal. In the event of an overcurrent in one of the phase lines for load energy supply and distribution, the trigger signal acts directly on a shutdown device which, in order to limit the damage, immediately prevents the supply of energy supply and distribution. The protection devices are supplied with energy via an energy supply device which is fed directly from the energy supply network. For this purpose, converter devices are used in a known manner, the correspondingly reduced conductor currents of which generate a DC voltage by means of a bridge rectifier device. The DC voltage is set to a setpoint with a voltage regulator, with which the charging capacitor in the protective device is charged immediately.
Die Stromversorgungseinrichtungen dieser Schutzgeräte erfor- dern einerseits trotz einer verlustarmen Einspeisung eine un- ter den verschiedensten Betriebsbedingungen sichere Aufladung des Ladekondensatcrs und andererseits muß die volle Kapazität des Ladekondensators in kürzester Zeit sichergestellt sein, um in Störfällen, beispielsweise bei elektrischen Kürzschlüssen, die Energieversorgung sehr schnell unterbrechen zu können. Diese sich zum Teil widersprechenden Anforderungen sind bisher mit relativ aufwendigen konventionellen Wandlern und entsprechend überdimensionierten mit hoher Verlustleistung behafteten Bauelementen realisiert.The power supply devices of these protective devices require, on the one hand, an ter the most diverse operating conditions safe charging of the charging capacitor and on the other hand, the full capacity of the charging capacitor must be ensured in a very short time in order to be able to interrupt the power supply very quickly in the event of faults, for example in the event of electrical short-circuits. These partially contradicting requirements have so far been achieved with relatively complex conventional converters and correspondingly oversized components with high power loss.
Es sind auch Energieversorgungseinrichtungen u. a. aus der WO 98/13916 bekannt, die mit Meßstrom gespeisten Stromversorgungsschaltungen ausgestattet sind und mit dem Sekundärstrom von elektronischen Wandlern bzw. Kleinsignal-Stromwandlerein- richtungen den Ladekondensator von elektronischen Auslöseeinrichtungen aufladen. Den Brückengleichrichtereinrichtungen sind ebenfalls kurzschließende Regeleinrichtungen parallel geschaltet, die als sogenannter Shuntregler den jeweiligen Wandler kurzschließen, wenn der Ladekondensator auf Nennspan- nung aufgeladen ist.There are also energy supply facilities u. a. Known from WO 98/13916, which are equipped with power supply circuits fed with measuring current and charge the charging capacitor of electronic tripping devices with the secondary current from electronic converters or small-signal current converter devices. Short-circuiting control devices are also connected in parallel to the bridge rectifier devices, which, as so-called shunt controllers, short-circuit the respective converter when the charging capacitor is charged to the nominal voltage.
Dieser Schaltvorgang bedingt durch den Kurzschluß hohe Verlustleistungen für die im Kurzschlußkreis angeordneten Bauelemente.This switching process requires high power losses for the components arranged in the short circuit due to the short circuit.
Die der Erfindung zugrunde liegende Aufgabe besteht darin, die in dieser Technik geforderten Bedingungen mit weniger Aufwand an Schaltmitteln mit erheblich geringeren Verlustleistungen zu erreichen und die Verfügbarkeit der vollen Kapazität des Ladekondensators jeder Zeit zu allen Betriebsbedin- gungen der Schaltanlagen sicher zu stellen. Erfindungsgemäß wird dies durch die Merkmale 1.1 die Schutzschalteinrichtung enthält eine bidirektional steuerbare Thyristorschaltung mit einem in Reihe geschalteten Vorwiderstand, 1.2 die Thyristorschaltung steht unter dem Steuereinfluß eines beim Überschreiten des Haltestroms derselben zündenden Abieiters,The object on which the invention is based is to achieve the conditions required in this technology with less expenditure on switching means with considerably lower power losses and to ensure the availability of the full capacitance of the charging capacitor at all times under all operating conditions of the switchgear. According to the invention, this is achieved by features 1.1. The protective switching device contains a bidirectionally controllable thyristor circuit with a series resistor connected in series. 1.2 the thyristor circuit is under the control of an arrester which ignites when the holding current is exceeded,
1.3 die Regeleinrichtung ist durch eine den Stromfluß der spannungsführenden Leitungen nach der Aufladung des Lade¬ kondensators des Schutzgerätes unterbrechende Längsregeleinrichtung realisiert,1.3 the control device is realized by a current flow the voltage-carrying lines to the charging of the charging capacitor ¬ the protective device interrupting longitudinal regulating device,
1.4 die Brückengleichrichtereinrichtung ist gleichstromseitig durch einen Hochspannungskondensator überbrückt, erreicht.1.4 the bridge rectifier device is bridged on the DC side by a high-voltage capacitor.
Mit dem Ersatz der bisher üblichen kurzschließenden Regelei- richtung mit maximaler Strombeanspruchung der im Kurzschlußstromkreis angeordneten Bauelemente durch eine Regeleinrich- tung mit der den Stromfluß nach der Aufladung des Ladekondensators unterbrechenden Längsregeleinrichtung mit mittlerer Laststrombeanspruchung, die sich auch für die Wandlereinrichtung und die Brückengleichrichtereinrichtung ergeben, sind die Anforderungen im Hinblick auf erheblich verringerte Ver- lustleistungen der Bauelemente weitestgehend erfüllt.With the replacement of the previously short-circuited control device with maximum current loading of the components arranged in the short-circuit circuit by a control device with the longitudinal control device which interrupts the current flow after charging the charging capacitor and has a medium load current load, which also result for the converter device and the bridge rectifier device largely fulfills the requirements with regard to significantly reduced component loss performance.
Während die sekundärseitigen Wandlereinrichtungen bisher bei der Bemessung des Drahtquerschnitts für einen maximal zulässigen Dauerstrom bzw. für einen thermischen Grenzstrom ausgelegt sind, ist der Drahtquerschnitt des sekundärseitigen Wandlereinrichtung bei der erfindungsgemäßen Energieversorgungseinrichtung für den mittleren Laststrom ausgelegt. Lediglich die Spannungsfestigkeit des Drahtes ist so zu dimensionieren, daß sie über der Zündspannung des Abieiters liegt. Die bisher nach dem bekannten Niedervoltkonzept konzipierten verlustreichen Energieversorgungseinrichtungen sind also ersetzt durch verlustarme Energieversorgungseinrichtungen nach dem bekannten Hochvoltkonzept.While the secondary-side converter devices have so far been designed for a maximum permissible continuous current or for a thermal limit current when dimensioning the wire cross-section, the wire cross-section of the secondary-side converter device in the power supply device according to the invention is designed for the average load current. Only the dielectric strength of the wire is to be dimensioned such that it is above the ignition voltage of the conductor. The high-loss energy supply devices previously designed according to the known low-voltage concept are therefore replaced by low-loss energy supply devices according to the known high-voltage concept.
Nach Erreichen der Sollspannung, bei der die Längsregeleinrichtung nach dem Aufladen des Ladekondensators den Stromfluß der spannungsführenden Leitung unterbricht, sind die sekun- därseitige Wandlereinrichtung und die Brückengleichrich- tereinrichtung durch den Hochspannungskondensator überbürdet, der dann Spannungswerte im Bereich mehrerer 100 Volt annehmen kann. Die Schutzschalteinrichtung parallel zur Wandlerein- richtung und zur Brückengleichrichtereinrichtung verhindert allerdings mit der bidirektional steuerbaren Thyristorschaltung in Verbindung mit dem beim Überschreiten des Haltestromes derselben zündenden Abieiter eine Zerstörung der Bauelemente, da die beim Auftreten von Überspannungen erzeugten ho- hen Induktionsspannungen im Sekundärbereich der Wandlereinrichtung unwirksam geschaltet sind.After the target voltage has been reached, at which the series regulator interrupts the current flow of the live line after charging the charging capacitor, the seconds The overload-side converter device and the bridge rectifier device are overloaded by the high-voltage capacitor, which can then assume voltage values in the range of several 100 volts. The protective switching device parallel to the converter device and to the bridge rectifier device, however, with the bidirectionally controllable thyristor circuit in conjunction with the arrester which ignites when the holding current of the same exceeds the holding current, prevents the components from being destroyed, since the high induction voltages generated in the secondary region of the converter device are ineffective when overvoltages occur are.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung sind die Merkmale 2.1 die Längsregeleinrichtung ist aus einem schnell einschwingenden Analogregler und aus einem verlustleistungsarmen Schaltstufenregler gebildet, 2.2 der Analogregler und der Schaltstufenregler sind durch Entkopplungsdioden funktioneil entkoppelt, 3.3 die Längsregeleinrichtung ist derart steuerbar, daß in einem ersten Zeitabschnitt das Aufladen des Ladekondensators ausschließlich durch den Analogregler erfolgt und danach mit Beginn eines zweiten Zeitabschnitts gänzlich von dem Schaltstufenregler übernommen ist, vorgesehen.According to an advantageous embodiment of the invention, the features are 2.1 the longitudinal control device is formed from a fast-acting analog controller and a low-loss switching stage controller, 2.2 the analog controller and the switching stage controller are functionally decoupled by decoupling diodes, 3.3 the longitudinal control device is controllable in such a way that in a first time period The charging capacitor is charged exclusively by the analog controller and is then taken over entirely by the switching stage controller at the beginning of a second period.
Beim Analogregler steht der Transistorschalter der Längsregeleinrichtung derart unter dem Steuereinfluß des im Kathodenzweig des Shuntreglers angeordneten Optokopplers, daß der Ausgangsstrom beim Schalten der Leistungsschalter im Kurz- schlußfall zur sicheren Auslösung derselben führt. Mit dem Wirksamwerden der Längsregeleinrichtung übernimmt also der Analogregler sofort die Einspeisung für den Ladekondensator des Schutzgerätes. Da die erzeugte Ausgangsspannung geringfügig unterhalb unter der Nennausgangsspannung liegt, kann der Schaltstufenregler praktisch lastfrei in kurzer Zeit an- schwingen. Nach dem der Schaltstufenregler voll eingeschwungen ist, wird der Analogregler dadurch außer Betrieb gesetzt, daß der Shuntregler durchsteuert und damit der Optokoppler die Gate-Source-Strecke des Transistorschalters kurzschließt. Funktionen ist der im ersten Zeitabschnitt mit höherer Verlustleistungsbilanz behaftete Analogregler somit durch den im zweiten Zeitabschnitt allein wirksamen, mit wesentlich verringerter Verlustleistung behafteten, Schaltstufenregler ersetzt. Die Kombination eines schnell einschwingenden Analogreglers mit relativ hoher Verlustleistung mit einem zeitversetzt wirksam werdenden Schaltstufenregler mit entsprechend geringerer Verlustleistung kann auch unabhängig von der Energieversorgung von Schutzgeräten allgemein zur Verminderung von Verlustleistungen insgesamt eingesetzt werden.In the case of the analog regulator, the transistor switch of the series regulating device is under the control influence of the optocoupler arranged in the cathode branch of the shunt regulator in such a way that the output current when the circuit breaker is switched in the event of a short circuit leads to the safe tripping thereof. When the series regulating device becomes effective, the analog controller immediately takes over the feed for the charging capacitor of the protective device. Since the generated output voltage is slightly below the nominal output voltage, the switching stage controller can be switched on practically without load in a short time swing. After the switching stage controller has fully settled, the analog controller is put out of operation by the shunt controller turning on and thus the optocoupler short-circuiting the gate-source path of the transistor switch. Functions, the analog controller with a higher power loss balance in the first time period is thus replaced by the switching stage controller which is effective only in the second time period and has a significantly reduced power loss. The combination of a fast-settling analog controller with a relatively high power loss and a switching stage controller with a correspondingly lower power loss, which becomes effective with a time delay, can also be used generally to reduce power losses overall, regardless of the power supply to protective devices.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht das MerkmalThe feature provides a further advantageous embodiment of the invention
3.1 die Längsregeleinrichtung ist mit einer Ladestrombegren- zungsschaltung ausgestattet, vor.3.1 the longitudinal control device is equipped with a charging current limiting circuit in front.
Damit sind auch Bauelemente mit entsprechend geringen Verlustleistungen verwendbar.This means that components with a correspondingly low power loss can also be used.
Die Erfindung wird durch drei Figuren näher erläutert, wobei die Figur 1 den bisher üblichen Stand der Technik im Prinzipschaltbild abbildet, die Figur 2 die erfindungsgemäße Energieversorgungseinrichtung im Prinzipschalbild zeigt und die Figur 3 eine bevorzugte Ausführungsform der Energieversor- gungseinrichtung gemäß Figur 2 darstellt.The invention is explained in more detail by means of three figures, with FIG. 1 depicting the prior art which has been customary up to now in the basic circuit diagram, FIG. 2 showing the energy supply device according to the invention in the basic circuit diagram and FIG. 3 representing a preferred embodiment of the energy supply device according to FIG.
Die Figur 1 zeigt den prinzipiellen Aufbau der bekannten Energieversorgungseinrichtungen, die im wesentlichen aus einer Brückengleichrichtereinrichtung BG und einer nach Ab- schluß des Ladevorganges die Spannungsversorgungsleitungen mit dem Transistorschalter TK kurzschließenden Regeleinrichtung KR gebildet sind. Zwisrhen der Wandlereinrichtung V.'Ξ und der Brückengleichrichtereinrichtung BG ist eine Schutzschalt- einrichtung SE vorgesehen, mit der die Bauelemente vor den Auswirkungen hoher induzierter Induktionsspannungen bei Netzkurzschlüssen geschützt sind.FIG. 1 shows the basic structure of the known energy supply devices, which essentially consist of a bridge rectifier device BG and the voltage supply lines after the charging process has been completed short-circuiting control device KR are formed with the transistor switch TK. Between the converter device V.'Ξ and the bridge rectifier device BG, a protective switching device SE is provided, with which the components are protected against the effects of high induced induction voltages in the event of network short-circuits.
Mit der an der Regeleinrichtung KR anliegenden Ausgangsspannung UA wird der Ladekondensator CL des Schutzgerätes SG derart aufgeladen, daß das Schutzgerät SG bei Netzkurzschlüssen mittels nicht dargestellter Schaltkontakte die Energieversorgung im gestörten Netzteil sofort unterbricht.With the output voltage UA applied to the control device KR, the charging capacitor CL of the protective device SG is charged in such a way that the protective device SG immediately interrupts the energy supply in the faulty power supply unit in the event of network short-circuits by means of switching contacts (not shown).
Die Figur 2 zeigt die erfindungsgemäße Energieversorgungseinrichtung mit ihren wesentlichen Funktionselementen ebenfalls in vereinfachter Prinzipdarstellung. Einer der wesentlichenFIG. 2 shows the energy supply device according to the invention with its essential functional elements, likewise in a simplified basic illustration. One of the essential ones
Unterschiede zu den bekannten Energieversorgungseinrichtungen besteht darin, daß die kurzschließende Regeleinrichtung KR (Fig. 1) ersetzt ist durch die Längsregeleinrichtung LR. Die Längsregeleinrichtung LR ist mit dem die Leitung zur Span- nungsversorgung unterbrechenden Transistorschalter TU ausgestattet, der durch Einwirken des Shuntreglers SR gesteuert ist. Die Brückengleichrichtereinrichtung BG ist gleichstrom- seitig durch den Hochspannungskondensator CH überbrückt, der im Fall des sperrenden Transitorschalters TU auf einen Span- nungswert von mehreren 100 Volt aufgeladen ist.Differences from the known energy supply devices is that the short-circuiting control device KR (FIG. 1) is replaced by the longitudinal control device LR. The longitudinal regulating device LR is equipped with the transistor switch TU which interrupts the line for the voltage supply and which is controlled by the action of the shunt regulator SR. The bridge rectifier device BG is bridged on the DC side by the high-voltage capacitor CH, which in the case of the blocking transistor switch TU is charged to a voltage value of several 100 volts.
Die Wandlereinrichtung WE ist also im Gegensatz zu den bekannten Energieversorgungseinrichtungen hier nur während des Ladevorganges gebürdet und ansonsten ungebürdet. Dementsprechend sind die Brückengleichrichtereinrichtung BG und der Transistorschalter TU nur durch einen mittleren Laststrom der Wandlereinrichtung belastet.In contrast to the known energy supply devices, the converter device WE is only burdened here during the charging process and is otherwise unloaded. Accordingly, the bridge rectifier device BG and the transistor switch TU are loaded only by an average load current of the converter device.
Die Schutzschalteinrichtung SE enthält hier eine bidirektional steuerbare Thyrstorschaltung TH, die zur Strombegrenzung mit einem Vorwiderstand RV in Reihe geschaltet ist. Dabei steht die Thyristorschaltung TR unter dem Steueinfluß des Ab- leiters AL, der beim Überschreiten des Haltestroms der Thyristorschaltung TH zündet. Auch hier wird mit der an der Lär'. s- regeleinrichtung anstehenden Ausgangsspannung UA letztlich der Ladekondensator CL des Schutzgerätes SG auf den erforder- liehen Spannungswert aufgeladen.The protective switching device SE here contains a bidirectionally controllable thyristor circuit TH, which is connected in series with a series resistor RV to limit the current. The thyristor circuit TR is under the control influence of the conductor AL, which ignites when the holding current of the thyristor circuit TH is exceeded. Here, too, will be on the Lär ' . The output voltage UA applied to the control device is ultimately charged by the charging capacitor CL of the protective device SG to the required voltage value.
Die Figur 3 läßt weitere Einzelheiten der erfindungsgemäßen Energieversorgungseinrichtung nach Figur 2 in einer bevorzugten Ausführungsform erkennen, in der ebenfalls nur die zum Verständnis notwendigen Bauelemente dargestellt und bezeichnet bzw. nur angedeutet sind.FIG. 3 shows further details of the energy supply device according to the invention according to FIG. 2 in a preferred embodiment, in which only the components necessary for understanding are also shown and labeled or only indicated.
Die Längsregeleinrichtung LR besteht hier im wesentlichen aus dem Analogregler AN und dem Schaltstufenregler RS. Zur Ver- lustminimierung steht der Transistorschalter TS unter dem Steuereinfluß des Optokoplers OK, der direkt im Kathodenzweig des Shuntreglers SR angeordnet ist. Sowie die Spannung am Kondensator C auf die Nennausgangsspannung angestiegen ist, wird der Shuntregler SR niederoh ig und der Optokoppler OK derart wirksam, daß sich als Ausgangsspannnung UA ein zuläs- sig begrenzter Spannungswert einstellt.The longitudinal control device LR essentially consists of the analog controller AN and the switching stage controller RS. To minimize loss, the transistor switch TS is under the control influence of the optocoupler OK, which is arranged directly in the cathode branch of the shunt regulator SR. As soon as the voltage at the capacitor C has risen to the nominal output voltage, the shunt regulator SR becomes low and the optocoupler OK becomes so effective that an admissibly limited voltage value is established as the output voltage UA.
Mit der Uberspannungsschutzdiode US ist das nach geschaltete Schutzgerät SG vor auftretende Überspannungen geschützt. Wie eingangs erwähnt, enthält die Längsregeleinrichtung LR außerdem den Schaltstufenregler RS. Der Schaltstufenregler RS und der Analogregler AN sind innerhalb der Längsregeleinrichtung LR durch die Entkopplungsdioden EDI, 2 funktionell gegeneinander entkoppelt, so daß definierte Funktionsabläufe für die Ladevorgänge ablaufen können. Da der Beginn des Ladevorganges zunächst ausschließlich durch den Analogregler AN übernommen ist, kann der Schaltstufenregler SR mit seinerWith the overvoltage protection diode US, the downstream protective device SG is protected against overvoltages. As mentioned at the beginning, the longitudinal control device LR also contains the switching stage controller RS. The switching stage controller RS and the analog controller AN are functionally decoupled from one another within the longitudinal control device LR by the decoupling diodes EDI, 2, so that defined functional sequences for the charging processes can take place. Since the start of the charging process is initially carried out exclusively by the analog controller AN, the switching stage controller SR can be used with its
Schaltstufeneinrichtung SS lastfrei anschwingen und sich in sehr kurzer Zeit im eingeschwungenen Zustand befinden. Danach wird der Shuntregler SR vom Schaltstufenregler SR durchgesteuert und mit Hilfe des Optokopplers OK die Gate-Source- Strecke des Transistorschalters TS mit dem leitenden Transis tor T kur zgeschlossen .Swing gear shift device SS load-free and be in a steady state in a very short time. Then the shunt controller SR is controlled by the switching stage controller SR and the gate-source Route of the transistor switch TS with the conductive transistor T short-circuited.
Mit dem Transistor T und dem Widerstand R der Analogreglers AN ist der Ladestrom für den Ladekondensator CL des Schut zgerätes SG auf einen zulässigen Wert begrenzt . With the transistor T and the resistor R of the analog controller AN, the charging current for the charging capacitor CL of the protective device SG is limited to a permissible value.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99955807A EP1116312A1 (en) | 1998-09-22 | 1999-09-22 | Power supply device for protective devices for switchgear |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19845779.0 | 1998-09-22 | ||
| DE1998145779 DE19845779A1 (en) | 1998-09-22 | 1998-09-22 | Power supply for protective device in medium voltage switch gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000017981A1 true WO2000017981A1 (en) | 2000-03-30 |
Family
ID=7883435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1999/003091 Ceased WO2000017981A1 (en) | 1998-09-22 | 1999-09-22 | Power supply device for protective devices for switchgear |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1116312A1 (en) |
| CN (1) | CN1319269A (en) |
| DE (1) | DE19845779A1 (en) |
| WO (1) | WO2000017981A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19954038A1 (en) * | 1999-10-29 | 2001-05-03 | Siemens Ag | Low-voltage (LV) circuit-breaker release |
| DE102007058877A1 (en) * | 2007-12-05 | 2009-06-18 | Sartorius Ag | Current limiting circuit |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE553522T1 (en) | 2000-12-28 | 2012-04-15 | Abb Technology Ag | IMPROVED MEDIUM VOLTAGE SWITCHING DEVICE |
| CN100568695C (en) * | 2003-05-30 | 2009-12-09 | 新巨企业股份有限公司 | Integrated information household electrical appliance power supply device |
| DE102010033238A1 (en) * | 2010-07-29 | 2012-02-02 | Siemens Aktiengesellschaft | Circuit breaker and device for monitoring a circuit breaker |
| DE102016217425A1 (en) * | 2016-09-13 | 2018-03-15 | Siemens Aktiengesellschaft | power supply |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0155429A1 (en) * | 1984-02-24 | 1985-09-25 | Siemens Aktiengesellschaft | Circuit arrangement for the supervision of a voltage |
| EP0702445A1 (en) * | 1994-09-14 | 1996-03-20 | Siemens Aktiengesellschaft | Fault current protective switch with energy storage circuit |
-
1998
- 1998-09-22 DE DE1998145779 patent/DE19845779A1/en not_active Withdrawn
-
1999
- 1999-09-22 CN CN 99811234 patent/CN1319269A/en active Pending
- 1999-09-22 EP EP99955807A patent/EP1116312A1/en not_active Ceased
- 1999-09-22 WO PCT/DE1999/003091 patent/WO2000017981A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0155429A1 (en) * | 1984-02-24 | 1985-09-25 | Siemens Aktiengesellschaft | Circuit arrangement for the supervision of a voltage |
| EP0702445A1 (en) * | 1994-09-14 | 1996-03-20 | Siemens Aktiengesellschaft | Fault current protective switch with energy storage circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19954038A1 (en) * | 1999-10-29 | 2001-05-03 | Siemens Ag | Low-voltage (LV) circuit-breaker release |
| DE102007058877A1 (en) * | 2007-12-05 | 2009-06-18 | Sartorius Ag | Current limiting circuit |
| US7924543B2 (en) | 2007-12-05 | 2011-04-12 | Sartorius Ag | Current-limiting circuit with additional current path |
| DE102007058877B4 (en) * | 2007-12-05 | 2014-11-27 | Sartorius Lab Instruments Gmbh & Co. Kg | Current limiting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1319269A (en) | 2001-10-24 |
| EP1116312A1 (en) | 2001-07-18 |
| DE19845779A1 (en) | 2000-03-23 |
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