EP0197369A1 - Procédé et dispositif pour alimenter en impulsions haute tension un filtre électrostatique - Google Patents

Procédé et dispositif pour alimenter en impulsions haute tension un filtre électrostatique Download PDF

Info

Publication number: EP0197369A1
Authority: EP; European Patent Office
Prior art keywords: voltage; voltage transformer; electrical separator; control unit; primary winding
Prior art date: 1985-03-29
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.): Granted

Application number

EP86103602A

Other languages

German (de)

English (en)

Other versions

EP0197369B1 (fr

Inventor

Richard Dipl.-Ing. Dallhammer

Gerhard Dipl.-Ing. Dönig

Hartmut Dipl.-Ing. Gaul

Walter Dipl.-Ing. Schmidt

Franz Dipl.-Ing. Neulinger

Helmut Dipl.-Ing. Schummer

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

GEA Group AG

Siemens AG

Siemens Corp

Original Assignee

Metallgesellschaft AG

Siemens AG

Siemens Corp

Priority date (The priority date 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 date listed.)

1985-03-29

Filing date

1986-03-17

Publication date

1986-10-15

1986-03-17 Application filed by Metallgesellschaft AG, Siemens AG, Siemens Corp filed Critical Metallgesellschaft AG

1986-03-17 Priority to AT86103602T priority Critical patent/ATE48547T1/de

1986-10-15 Publication of EP0197369A1 publication Critical patent/EP0197369A1/fr

1989-12-13 Application granted granted Critical

1989-12-13 Publication of EP0197369B1 publication Critical patent/EP0197369B1/fr

Status Expired legal-status Critical Current

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Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S323/00—Electricity: power supply or regulation systems
- Y10S323/903—Precipitators

Definitions

the invention relates to a method for supplying an electrical separator with high-voltage pulses, which are generated by excitation on the primary side of a high-voltage transformer coupled on the secondary side to the electrical separator. Furthermore, the invention relates to a device for supplying an electrical separator with high-voltage pulses, in which the primary winding of a high-voltage transformer coupled on the secondary side to the electrical separator can be excited from a direct voltage source by means of a direct current controller that can be controlled by a first control unit.
high-voltage pulses In the case of electrostatic precipitators, in order to increase the degree of dust separation, it has proven to be effective to apply high-voltage pulses of variable amplitude and frequency to the electrodes in addition to a direct voltage which is as close to the breakdown limit as possible, in order to generate additional charge carriers in the electrostatic precipitator without provoking the formation of an arc.
the high-voltage pulses are generally generated by energizing the primary winding of a high-voltage transformer which is coupled on the secondary side to the electrical separator.
Such devices are known for example from DE-OS 32 46 057.
the object of the present invention is therefore to provide a generic method and a generic device which ensure a consistently high quality of the transmission of the high-voltage pulses.
the advantage of the disclosed solution resides in the cyclical feedback of the magnetization of the high-voltage transformer and in the resulting undiminished transmission of the high-voltage pulses to the electrical separator.
the device shown in Fig. 1 for supplying an electric separator A draws its energy from a three-phase network with phases R, S, T. Via controllable rectifiers G1 to G6, a variable voltage DC voltage is generated at the capacitor C1 and by the first control unit S1 controlled ignition of the thyristor T1 to the primary winding W1 of the voltage transformer H, whereby a high voltage pulse is induced in the secondary winding W2. This reaches the electrical separator A via a coupling capacitance C2 and is superimposed on the direct voltage DC present there via a resistor R2, so that additional charge carriers are generated in the electrical separator A without the formation of an arc.
the diode G7 conducts currents returning from the electrical separator A via the high-voltage transformer H to the capacitance C1 and in this respect serves in a known manner for energy recovery and also for protection
the ignition frequency specified by the first control unit S1 to the thyristor T1 depends on the operating parameters of the electrostatic precipitator A, such as the type of dust, the dust loading, the desired degree of dust separation or the DC voltage DC.
FIGS. 2 and 3 where the voltage u 'and the current i' of the electrostatic precipitator A are shown in the event that the proposed demagnetization of the high-voltage gas transformer H is not yet used (for the measurement the source of the DC voltage DC is not connected to the electrical separator A or the resistor R2).
the thyristor T1 is ignited by the first control unit S1 and the primary winding W1 of the high-voltage transformer H is excited.
the high-voltage pulse thus induced in the secondary winding W2 of the high-voltage transformer H charges the capacitive-acting electrical separator A to the voltage value u by the time t2.
the electrical separator A discharges again (i ' ⁇ 0) via the series resonant circuit consisting of coupling capacitor C2 and the secondary winding W2, but not completely: A residual charge and residual voltage remain on the electrical separator A, above all because because the discharge current induced on the primary side the diode G7 swings back to the capacitance C1 against which the voltage across the capacitance C1 must flow.
the flooding of the core of the high-voltage transformer H between times t2 and t3 is not exactly the same as the flooding between times t1 and t2 (see FIG. 3: i2 ⁇ il). Therefore, even when using magnetically soft core materials, residual magnetization of the core of the high-voltage transformer H remains after transmission of the pulse and increases with each subsequent pulse until the core material is magnetically saturated and further pulses are no longer or only insufficiently transmitted.
thyristor T2 Via a current limiting resistor R1 parallel to the primary winding W1 of the high-voltage transformer H, thyristor T2 from a second control unit S2, based on information from the first control unit S1 and / or measurement signals from the high-voltage transformer H or electrical separator A, for a short time, i.e. maximum for the time until the start of the next pulse generation cycle, is controlled in the conductive state.
This primary-side short-circuit completes the discharge process of the electrodepositor A via the magnetically coupled series resonant circuit W2, C2 up to the point in time t5, so that the successive opposite flows through the core are approximately the same and thus have an effect on the remanent magnetization of the high-voltage transformer Neutralize H.
the time t4 at which the control unit S2 ignites the thyristor T2 can be as close as desired to the time t3 at which the discharge current becomes zero. 4 and 5, there is a clear margin between these times only for drawing reasons.
the thyristor T2 could even immediately after the time t2, i.e. after the return of the thyristor T1 in the blocking state, are fired to support the discharge process. Then, however, the part of the energy which oscillates back, which is otherwise charged back to the capacitor C1 between the times t2 and t3, would be destroyed by the short-circuit of the primary winding caused by thyristor T2 and resistor R1.
connection shown in Fig. 1 between the first control unit S1 and the second control unit S2 is used to synchronize the control unit S2 with respect to the control unit S1, e.g. to rule out timeless firing of the thyristor T2 or - with a given pulse width - to operate a purely time control of S2.-If, due to the expenditure of energy for the generation of charge carriers in the electrical separator A or due to ohmic losses, the described discharge process of the electrical separator A does not result in a symmetrical flow despite completeness of the core of the high-voltage transformer H is sufficient, as an additional measure to support the demagnetization, a permanent counter-flooding of the high-voltage transformer H can be provided in a manner known per se such that a tertiary winding W3 applied to its core is supplied by a direct current which is oriented in the opposite direction to the primary excitation, e.g. can be obtained in a conventional manner from the AC network (see low-voltage transformer N,
control units S1 and S2 need not necessarily be in the form of separate systems; their combination into a central control unit is useful in many practical cases.
the thyristor T3 is e.g. via the current limiting resistor R1 parallel to the primary winding W1. If their voltage exceeds a critical value, the breakdown diode BOD becomes conductive and ignites the thyristor T3 via the resistor R3 and the diode G8, so that the voltage on the primary winding W1 breaks down.
the current flowing through thyristor T3 is oriented in the opposite direction to the current that thyristor T2 has to carry cyclically.
the functions of the thyristors T2 and T3 can thus be combined in a single controllable semiconductor switching element if it is bidirectionally conductive.

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Engineering & Computer Science (AREA)
Automation & Control Theory (AREA)
Electrostatic Separation (AREA)
Apparatus For Radiation Diagnosis (AREA)
Generation Of Surge Voltage And Current (AREA)
Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

EP86103602A 1985-03-29 1986-03-17 Procédé et dispositif pour alimenter en impulsions haute tension un filtre électrostatique Expired EP0197369B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT86103602T ATE48547T1 (de)	1985-03-29	1986-03-17	Verfahren und einrichtung zur versorgung eines elektroabscheiders mit hochspannungsimpulsen.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE19853511622 DE3511622A1 (de)	1985-03-29	1985-03-29	Verfahren und einrichtung zur versorgung eines elektroabscheiders mit hochspannungsimpulsen
DE3511622		1985-03-29

Publications (2)

Publication Number	Publication Date
EP0197369A1 true EP0197369A1 (fr)	1986-10-15
EP0197369B1 EP0197369B1 (fr)	1989-12-13

Family

ID=6266827

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP86103602A Expired EP0197369B1 (fr)	1985-03-29	1986-03-17	Procédé et dispositif pour alimenter en impulsions haute tension un filtre électrostatique

Country Status (7)

Country	Link
US (1)	US4670829A (fr)
EP (1)	EP0197369B1 (fr)
JP (1)	JPS61230758A (fr)
AT (1)	ATE48547T1 (fr)
AU (1)	AU573433B2 (fr)
DE (2)	DE3511622A1 (fr)
ZA (1)	ZA862313B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DK0534950T3 (da) *	1990-04-04	1995-12-18	Siemens Ag	Reguleringsfremgangsmåde til strømforsyningsindretningen i et elektrofilter
JPH07232102A (ja) *	1993-12-28	1995-09-05	Mitsubishi Heavy Ind Ltd	電気集塵装置
US5542967A (en) *	1994-10-06	1996-08-06	Ponizovsky; Lazar Z.	High voltage electrical apparatus for removing ecologically noxious substances from gases
US5689177A (en) *	1996-01-11	1997-11-18	The Babcock & Wilcox Company	Method and apparatus to regulate a voltage controller
US6063168A (en) *	1997-08-11	2000-05-16	Southern Company Services	Electrostatic precipitator
US6874224B2 (en) *	2002-06-21	2005-04-05	Waukesha Electric Systems, Inc.	Method for manufacturing a multi-site spare three-phase transformer
KR100462275B1 (ko) *	2002-07-18	2004-12-17	두산중공업 주식회사	전기집진기용 인버터의 스위칭 타임 설정 회로와 그 방법
RU2291000C1 (ru) *	2005-04-12	2007-01-10	Государственное унитарное предприятие "Всероссийский электротехнический институт им. В.И. Ленина"	Устройство для питания электрофильтра (варианты)
EP2397227A1 (fr) *	2010-06-18	2011-12-21	Alstom Technology Ltd	Procédé pour contrôler la distorsion de ligne dans un système d'alimentations électriques de dépoussiéreurs électriques
CN105080723B (zh) *	2014-05-07	2018-02-13	浙江佳环电子有限公司	一种大功率高压脉冲产生电路
WO2015188837A1 (fr) *	2014-06-13	2015-12-17	Flsmidth A/S	Commande d'une alimentation haute tension pour un électrofiltre
CN111565853B (zh) *	2017-10-09	2022-09-27	夸普瑞典公司	高压电源系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2162988A1 (de) *	1970-12-23	1972-07-13	Int Standard Electric Corp	Spannungsregler
US4061961A (en) *	1976-07-02	1977-12-06	United Air Specialists, Inc.	Circuit for controlling the duty cycle of an electrostatic precipitator power supply
EP0108963A1 (fr) *	1982-11-06	1984-05-23	Walther & Cie. Aktiengesellschaft	Circuit d'alimentation pour un séparateur de poussières électrostatique
EP0111794A1 (fr) *	1982-12-13	1984-06-27	Metallgesellschaft Ag	Dispositif pour l'alimentation en tension d'un électrofiltre
DE3308411A1 (de) *	1983-03-09	1984-09-13	Siemens AG, 1000 Berlin und 8000 München	Spannungsversorgung fuer ein elektrofilter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4441146A (en) *	1982-02-04	1984-04-03	Vicor Corporation	Optimal resetting of the transformer's core in single ended forward converters

1985
- 1985-03-29 DE DE19853511622 patent/DE3511622A1/de not_active Withdrawn
1986
- 1986-03-17 AT AT86103602T patent/ATE48547T1/de not_active IP Right Cessation
- 1986-03-17 DE DE8686103602T patent/DE3667411D1/de not_active Expired - Lifetime
- 1986-03-17 EP EP86103602A patent/EP0197369B1/fr not_active Expired
- 1986-03-26 JP JP61068274A patent/JPS61230758A/ja active Pending
- 1986-03-27 AU AU55316/86A patent/AU573433B2/en not_active Ceased
- 1986-03-27 ZA ZA862313A patent/ZA862313B/xx unknown
- 1986-03-28 US US06/845,927 patent/US4670829A/en not_active Expired - Fee Related

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2162988A1 (de) *	1970-12-23	1972-07-13	Int Standard Electric Corp	Spannungsregler
US4061961A (en) *	1976-07-02	1977-12-06	United Air Specialists, Inc.	Circuit for controlling the duty cycle of an electrostatic precipitator power supply
EP0108963A1 (fr) *	1982-11-06	1984-05-23	Walther & Cie. Aktiengesellschaft	Circuit d'alimentation pour un séparateur de poussières électrostatique
EP0111794A1 (fr) *	1982-12-13	1984-06-27	Metallgesellschaft Ag	Dispositif pour l'alimentation en tension d'un électrofiltre
DE3308411A1 (de) *	1983-03-09	1984-09-13	Siemens AG, 1000 Berlin und 8000 München	Spannungsversorgung fuer ein elektrofilter

Also Published As

Publication number	Publication date
ATE48547T1 (de)	1989-12-15
JPS61230758A (ja)	1986-10-15
AU5531686A (en)	1986-10-02
ZA862313B (en)	1986-11-26
DE3511622A1 (de)	1986-10-09
AU573433B2 (en)	1988-06-09
EP0197369B1 (fr)	1989-12-13
DE3667411D1 (de)	1990-01-18
US4670829A (en)	1987-06-02

Legal Events

Date	Code	Title	Description
1986-08-29	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1986-10-15	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): AT CH DE FR GB LI SE
1986-12-30	17P	Request for examination filed	Effective date: 19861106
1988-07-06	17Q	First examination report despatched	Effective date: 19880524
1989-10-28	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
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1990-01-26	ET	Fr: translation filed
1990-02-21	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
1990-10-06	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1990-10-06	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1990-11-28	26N	No opposition filed
1992-03-23	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19920323 Year of fee payment: 7
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1994-11-16	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19940317
1995-01-31	EUG	Se: european patent has lapsed	Ref document number: 86103602.8 Effective date: 19931008

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