EP1982564A1 - Procédé destiné à moduler l'énergie électrique alimentée dans une lampe et dispositif mettant en oeuvre ce procédé - Google Patents

Procédé destiné à moduler l'énergie électrique alimentée dans une lampe et dispositif mettant en oeuvre ce procédé

Info

Publication number
EP1982564A1
EP1982564A1 EP07705602A EP07705602A EP1982564A1 EP 1982564 A1 EP1982564 A1 EP 1982564A1 EP 07705602 A EP07705602 A EP 07705602A EP 07705602 A EP07705602 A EP 07705602A EP 1982564 A1 EP1982564 A1 EP 1982564A1
Authority
EP
European Patent Office
Prior art keywords
lamp
lighting
duration
electrical power
time values
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.)
Withdrawn
Application number
EP07705602A
Other languages
German (de)
English (en)
Inventor
Fernando Negozi
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.)
Spes SCPA
Original Assignee
Spes SCPA
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.)
Filing date
Publication date
Application filed by Spes SCPA filed Critical Spes SCPA
Publication of EP1982564A1 publication Critical patent/EP1982564A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present invention relates to a method for modulation of the electrical power transferred to a lamp, said lamp being connected to a public-lighting network and being supplied electrically via said network, as well as a regulation device, designed to be installed between a lamp and a source of electrical energy, in particular a public-lighting network.
  • the present invention falls within the sector of public-lighting systems in urban and/or extra-urban areas and tackles in particular the question of energy saving at night, in which the traffic is limited.
  • Said standards generally refer to the night time, during which the light intensity of the lamps can be reduced by a given amount, typically distinguishing between areas in which the hours of dusk and dawn are markedly different on account of a different geographical location.
  • the regulation is made upstream, directly in the station that supplies a given public-lighting network, in which the instant of start and end of a "lighting session", i.e., of the interval of time during which the lighting system is kept active, is also managed in an automatic or manual way.
  • the differentiation of light between night hours with different traffic situations is typically made in the following two ways: by varying the intensity of the a.c. voltage applied to the lighting network or else by supplying the light points with two separate electrical lines, so that two contiguous lamps are never supplied by the same electrical line.
  • the systems belonging to the aforesaid first case consequently use appropriate variations of the amplitude of the a.c. mains voltage, which supplies the lighting system, for regulating the light intensity of the lamps, passing from the value of rated voltage, used for guaranteeing the full brightness of each individual lamp, to a predetermined voltage value, lower than the rated value, to which there corresponds a reduced brightness and a consequent reduction of the absorbed electrical power.
  • appropriate regulating control units are used, equipped with electronic control systems and appropriate power devices.
  • Said systems appear simple and effective, but have in actual fact the following limits: they have a high cost, since they involve the use of sophisticated high-power voltage regulators, they cannot exceed, in order to guarantee adequate levels of reliability, given values of power that can be supplied, consequently limiting the maximum number of light points that can be managed, and finally they do not guarantee, in the condition of reduced lighting (the so-called "energy- saving mode"), definite operation of the individual lamps, above all when these are not equipped with appropriate circuits for activation/re-activation of the discharge of the gas, such as, for example, the so-called “electronic ballasts", which are able to function even at voltages lower than the rated one.
  • the modulation of the power supplied is made locally (namely, at the individual light points), through appropriate high-efficiency electronic regulating systems (electronic ballasts). This enables the limits of the centralized systems to be overcome, but requires synchronization of the individual light points so as to guarantee that the variations of brightness of the lamps occur always at the same instant.
  • Synchronization systems are known based upon exchange of information between the central control system and the control systems of the individual light points, said exchange of information being made through an appropriate communication line, for example a radio-frequency communication line or else one based upon the so-called “conveyed waves" (power-line communication).
  • Said systems also have the advantage of enabling direct monitoring of the state of operation of each light point (for example, detected through the mechanism of self-diagnosis with which the same control system of each light point can be equipped) by the central control system, but present the drawback of being very costly, because they require the presence, in each light point, of an appropriate electronic control system capable not only of performing the function of regulation of the power supplied to the lamp (electronic-ballast function), but also of guaranteeing a stable and reliable communication, in any operating condition, with the central control system.
  • the purpose of the present invention is to present a method that is able to manage in an effective and inexpensive manner the function of energy saving of a public-lighting system, overcoming the various drawbacks described above, and a device that manages each light point through the implementation of said method.
  • the method according to the present invention comprises the steps of: i) determining one or more time values on the basis of at least one historical piece of information regarding operation of a lamp; and ii) making a variation of the electrical power transferred to said lamp at the aforesaid one or more time values, which are measured starting from a predetermined condition of operation of said lamp, said operating condition being preferably represented by the initial instant of activation of said lamp at each lighting session.
  • the method forming the subject of the present invention which regards a public-lighting network and has the purpose of reducing the consumption of electrical energy in accordance with the standards currently in force regarding energy saving, can be conveniently implemented within the control system of one or more light points belonging to one and the same public-lighting system.
  • control system of each light point is able to determine, for example at the start of each lighting session, one or more time values on the basis of at least one historical item of information regarding previous lighting sessions, and then to implement, during the current lighting session, a variation of the electrical power transferred to the lamp of the light point at said one or more time values, measured starting from the occurrence of a predetermined condition of operation of said lamp, said operating condition being represented preferably by the instant of activation of said lighting session.
  • FIG. 1 is a schematic illustration of the architecture of a regulation device, designed to be installed between a lamp and a source of electrical energy, in particular a public-lighting network, according to the invention
  • - Figure 2a is a schematic illustration of a possible evolution, during the year, of the hours of sunset and sunrise;
  • - Figure 2b is a schematic illustration of the evolution of the duration (in hours) of the night during the year, where the night period is defined as the interval of time comprised between sunset and sunrise;
  • - Figure 2c is a schematic illustration of the evolution, during the year, of the interval of time (in hours) that elapses between sunset and midnight hours in the various days of the year;
  • FIG. 3 a is a schematic illustration of a first profile of supply of electrical power to the light point, which represents a first possible embodiment of the method for modulation of the electrical power transferred to a lamp according to the invention
  • FIG. 3b is a schematic illustration of a second profile of supply of electrical power to the light point, which represents a second possible embodiment of the method for modulation of the electrical power transferred to a lamp according to the invention.
  • FIG. 3 c is a schematic illustration of a third profile of supply of electrical power to the light point, which represents a third possible embodiment of the method for modulation of the electrical power transferred to a lamp according to the invention.
  • the device for regulation of the light intensity of a lamp 40 according to the invention represented in Figure 1, comprises the following parts:
  • a power feeder 15 of an ac-dc type that is able to generate, by drawing electrical power from the lighting line 10, the a.c. voltage necessary for supplying the electronic control system (30, 35, 25) that manages said regulation device, indicated with 50;
  • microcontroller 30 which is able to perform the following functions: detection, through an appropriate input ZCD, of the zero-crossing pulses, i.e., the zero crossings of the a.c. voltage of the lighting line 10; timely identification, always through the same input ZCD, of the possible absence of said a.c. voltage; management, using appropriate electronic means 25, of the electronic-ballast function modulating the quantity of the power supplied to the lamp 40; and saving day after day of the information useful for pursuing the purposes of the invention, such as for example the duration of the current lighting session, on a nonvolatile memory 35; reading from said nonvolatile memory of the historical information accumulated day after day; and for implementation, through an appropriate software program, of the method forming the subject of the present invention;
  • nonvolatile memory 35 represented by an EEPROM or else by a flash memory, in the latter case said memory being preferably contained within said microcontroller 30;
  • an electronic driver 25 constituted by appropriate actuator means, by means of which the microcontroller 30 carries out regulation of the amount of power supplied to the lamp 40 in accordance with the method forming the subject of the present invention
  • said electronic driver can also contain appropriate means of diagnosis, which are able to detect possible malfunctioning of the lamp 40 and/or of the electronic driver 25 itself and to signal them to the microcontroller 30 through appropriate electrical signals.
  • a lighting line 10 to which a given number of light points 50, 40 is connected, for example the lamps that characterize an urban and/or extra-urban lighting system, each light point being made up of a lamp 40 and a device 50 for regulation of the power supplied to said lamp, set between the same lamp and said lighting line.
  • a lighting session starts when a given a.c. voltage is applied to the lighting line 10, for example 230 Vac or some other value, said a.c. voltage being characterized by a given frequency, for example equal to 50 Hz or some other value, and terminates 1 at the instant when said a.c. voltage is suppressed. At the moment when said a.c.
  • each light point receives supply and starts to perform its function of lighting, managed through the regulation device 50 and the corresponding lamp 40.
  • the microcontroller 30 starts to function executing the power-on routine, i.e., a specific software program dedicated to initialization of the variables of the control system of the light point 50, 40 itself.
  • the microcontroller 30 starts counting the duration of the current lighting session, fetches from the nonvolatile memory 35 the historical information necessary for calculating the instants in which the power supplied to the lamp must be varied, and carries out said calculations.
  • Said historical information stored in the form of mathematical relations and/or of data appropriately organized in tables, regards the duration of the last lighting session, the durations of the immediately preceding sessions, the statistical data regarding the preceding sessions and all the other information necessary for identifying the exact instants in which, starting from the instant of activation of the current lighting session, the quantity of electrical power supplied to the lamp 40 must be varied.
  • each light point is deprived of the supply, and the corresponding microcontroller 30 immediately terminates measurement of the duration of said lighting session and its storage in the nonvolatile memory 35.
  • Counting of time is performed using preferably the pulses of zero crossing of the a.c. voltage applied to the lighting line, in this way obtaining synchronization of all the light points of said line.
  • the microcontroller 30 of each light point 50, 40 is able to measure the time in an absolutely identical manner, all the light points being supplied with the same a.c. voltage, thus guaranteeing the necessary synchronism at the moments of variation, according to the invention, of the power supplied to the respective lamps.
  • the feeder 15 of the control system of each light point is equipped, according to the invention, with filter capacitors 20, appropriately sized in such a way as to accumulate the energy necessary to keep the microcontroller 30 active for a time such as to enable conclusion of the aforesaid measurement and to store the value of said measurement in the nonvolatile memory 35.
  • the microcontroller has available an input ZCD through which it detects continuously the zero crossing of the a.c.
  • the present invention consequently, regards a method for reducing the consumption of electrical energy in a public-lighting network, characterized in that:
  • each individual light point 50, 40 is managed through an appropriate control system 30, 35, associated to said light point and equipped with appropriate means 25, for example the ones typical of an electronic ballast, for autonomous regulation of the amount of power transferred to the corresponding lamp 40;
  • - the instant of deactivation of said lighting network, for each day of the solar year is likewise managed by the same central control system, which, at said instant of deactivation, sets said a.c. supply voltage to zero;
  • - the energy-saving function, associated to each lighting session of said network is managed autonomously by the control system of each light point according to the method forming the subject of the present invention.
  • the microcontroller 30 of the electronic control system of each light point 50, 40 contains, in its nonvolatile memory 35, information regarding the estimated hours in which, day after day throughout the year, the sun sets and rises, as described in Figure 2a. On the basis of said information said microcontroller is able to determine, day after day, the duration of the night, as represented in Figure 2b.
  • said historical piece of information is used by the control system of each light point to define, according to the invention, one or more time values at which, starting from the instant of activation of the lighting session, a variation of the power supplied to the corresponding lamp must be made.
  • the control system of each light point determines, through appropriate processing software, said one or more time values on the basis of the durations of the previous sessions.
  • the duration of the lighting session immediately preceding the one in course may be taken as reference, or else an average of the durations of a predetermined number of lighting sessions immediately prior to the current session, carrying out if necessary filtering, i.e., elimination, of the possible values of duration that, for any reason, diverge too much from the values of the duration of chronologically adjacent sessions.
  • a filtering mode may be the one described in what follows: in the calculation of said average duration, one or more lighting sessions are excluded when the ratio between the duration of said one or more lighting sessions and said average duration is lower than a predetermined validation coefficient.
  • the present invention envisages at least one variation, which necessarily takes the form of a reduction in said power.
  • a single negative variation of the electrical power transferred to the lamp 40 is made in accordance with the profile of power supply represented in Figure 3 a, where the reduction in the power supplied to the lamp of each light point belonging to one and the same lighting line is effected, purely by way of example, at midnight.
  • the microcontroller 30 determines a single time value, so that, starting from said time value, the consumption of electrical energy by the lamp 40 is reduced.
  • Figures 3a, 3b and 3c give on the ordinate the percentage value of the power supplied, the value 100 corresponding to the rated power. From the analysis of the historical data represented in Figures 2b and 2c it emerges that, if the distance in time of midnight from the instant of activation of the lighting session is equal to X and the duration of said session is equal to Y, the ratio between X and Y is approximately 0.45. This means that, if the duration of the current session is known on the basis of historical information regarding the immediately preceding sessions, it is possible to calculate the interval X associated to midnight through a simple mathematical operation of multiplication.
  • the ratio between the time value X, associated to the instant at which the first variation of the power supplied to the lamp is made, and Y, associated to the duration of the lighting session is comprised between a minimum value and a maximum value respectively lower and higher than the coefficient 0.45: for example, the value of said ratio can be comprised between 0.35 and 0.55.
  • the time value at which the negative variation of the electrical power transferred to the lamp is made (time value that corresponds to midnight in Figure 3 a) is obtained by multiplying the historical information regarding operation of the lamp 40 by a predetermined timing coefficient preferably comprised between 0.35 and 0.55.
  • the variations of the power supplied to the lamp are more than one, with the possibility of obtaining profiles of power absorption suited to the various night-time hours with different traffic intensities, as illustrated for example in Figure 3b, where, in addition to a first reduction of power made towards midnight, there is indicated also a second further reduction towards 3 o'clock in the morning.
  • At least one variation is of a positive type, i.e., such as to increase the power supplied to the lamp, as indicated in Figure 3 c, where the light intensity is given at the maximum value during the first hours of the day, when the traffic starts to intensify.
  • the time value associated to each can be calculated by multiplying the aforesaid duration Y by a given timing coefficient, or else be obtained from appropriate tables contained in the nonvolatile memory of the control system of each light point.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne un procédé destiné à moduler l'énergie électrique transférée dans une lampe, reliée à un réseau d'éclairage public et alimentée électriquement via ce réseau. Selon l'invention, le procédé de modulation consiste, dans un premier temps, à déterminer une ou plusieurs valeurs temporelles sur la base d'au moins une information historique concernant le fonctionnement de la lampe, puis à réaliser une variation de l'énergie électrique transférée dans la lampe aux valeurs temporelles préalablement déterminées, ces valeurs étant mesurées à partir d'une condition de fonctionnement prédéfinie de la lampe. L'invention concerne également un dispositif de régulation conçu de manière à mettre en oeuvre le procédé de cette invention.
EP07705602A 2006-02-07 2007-02-07 Procédé destiné à moduler l'énergie électrique alimentée dans une lampe et dispositif mettant en oeuvre ce procédé Withdrawn EP1982564A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000008A ITAN20060008A1 (it) 2006-02-07 2006-02-07 Metodo di modulazione della potenza elettrica trasferita ad una lampada e dispositivo che implementa tale metodo
PCT/IB2007/000372 WO2007091175A1 (fr) 2006-02-07 2007-02-07 Procédé destiné à moduler l'énergie électrique alimentée dans une lampe et dispositif mettant en oeuvre ce procédé

Publications (1)

Publication Number Publication Date
EP1982564A1 true EP1982564A1 (fr) 2008-10-22

Family

ID=38180308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07705602A Withdrawn EP1982564A1 (fr) 2006-02-07 2007-02-07 Procédé destiné à moduler l'énergie électrique alimentée dans une lampe et dispositif mettant en oeuvre ce procédé

Country Status (3)

Country Link
EP (1) EP1982564A1 (fr)
IT (1) ITAN20060008A1 (fr)
WO (1) WO2007091175A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012008215A1 (de) 2012-04-18 2013-10-24 Heribert Oechsler Vorrichtung zur Realisierung einer Referenzuhr mit selbsttätiger Anbindung der internen Systemzeit an die Erdrotation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009033358A1 (de) * 2009-07-16 2011-01-27 Elektrobau Oschatz Gmbh & Co. Kg Betriebssteuervorrichtung und Verfahren zur Steuerung des Betriebszustandes einer Leuchtmittelanordnung
DE102011053688B3 (de) * 2011-09-16 2013-03-21 Vossloh-Schwabe Deutschland Gmbh Betriebssteuervorrichtung und Verfahren zur Steuerung mehrerer Leuchten
WO2018134150A1 (fr) 2017-01-17 2018-07-26 Philips Lighting Holding B.V. Dispositif d'éclairage avec synchronisation de circuit de temporisation
CN111148306A (zh) 2020-01-17 2020-05-12 众普森科技（株洲）有限公司 灯具及其照明控制方法

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Publication number Priority date Publication date Assignee Title
FR2312853A1 (fr) * 1975-05-26 1976-12-24 Graniou Louis Electr Economiseur d'energie electrique par reduction du temps de fonctionnement
FR2482327A1 (fr) * 1980-03-28 1981-11-13 Elam Ltd Dispositif de commande des variations dans le temps de la puissance d'une installation d'eclairage en fonction d'un programme pre-etabli
DE4418315C2 (de) 1994-05-26 1998-02-26 L & R Losse Und Ramscheid Date Verfahren und Schaltungsvorrichtung zur Reduzierung des Energieverbrauchs von Straßenbeleuchtungsnetzen
FR2805355B1 (fr) * 2000-02-22 2002-05-03 L2G Dispositif de commande perfectionnee d'une alimentation electrique, notamment pour candelabres d'eclairage public
FR2847760B1 (fr) 2002-11-27 2006-12-22 App Et Bobinage Electr Du Limo Procede et dispositif de commande en eclairage reduit

Non-Patent Citations (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012008215A1 (de) 2012-04-18 2013-10-24 Heribert Oechsler Vorrichtung zur Realisierung einer Referenzuhr mit selbsttätiger Anbindung der internen Systemzeit an die Erdrotation
EP2672338A2 (fr) 2012-04-18 2013-12-11 Heribert Oechsler Dispositif permettant de réaliser un horloge de référence avec ajustement automatique avec la rotation de la terre, de l'heure interne au système
DE102012008215B4 (de) 2012-04-18 2019-06-13 Heribert Oechsler Vorrichtung zur Realisierung einer Referenzuhr mit selbsttätiger Anbindung der internen Systemzeit an die Erdrotation

Also Published As

Publication number Publication date
ITAN20060008A1 (it) 2007-08-08
WO2007091175A1 (fr) 2007-08-16

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