WO2009118696A1 - Régulation de puissance et son système de commande - Google Patents

Régulation de puissance et son système de commande Download PDF

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Publication number
WO2009118696A1
WO2009118696A1 PCT/IB2009/051243 IB2009051243W WO2009118696A1 WO 2009118696 A1 WO2009118696 A1 WO 2009118696A1 IB 2009051243 W IB2009051243 W IB 2009051243W WO 2009118696 A1 WO2009118696 A1 WO 2009118696A1
Authority
WO
WIPO (PCT)
Prior art keywords
load
voltage
inductors
electrical
vrcu
Prior art date
Application number
PCT/IB2009/051243
Other languages
English (en)
Inventor
Yeoshua Barak
David Doctory
Original Assignee
Yeoshua Barak
David Doctory
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 Yeoshua Barak, David Doctory filed Critical Yeoshua Barak
Publication of WO2009118696A1 publication Critical patent/WO2009118696A1/fr

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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
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel
    • H05B47/22—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel with communication between the lamps and a central unit

Definitions

  • the present invention relates to a system for the control of electrical power consumption.
  • this invention relates to a system for control and regulation of electrical power of loads such as street light installations, air conditioners, motors and the like.
  • a streetlight installation typically include, lighting body, streetlight post and lighting board.
  • the lighting body is the electrical consumer of the street light installation.
  • Each lighting body typically includes a choke, a starter, a capacitor, a lamp, a lamp housing, electric wiring and connectors.
  • Fig. 1 there is shown lighting body circuitry 28 as known in the art, for actuating a street light lamp (e.g. high pressure sodium bulbs).
  • Choke 32 and starter 34 are connected serially and are used for actuation lamp 36.
  • Alternating voltage power source not shown, is used for applying power to electric circuit 28.
  • starter 34 checks that the lamp is not actuated yet and generates high voltage for actuating the lamp. After the lamp is actuated, Choke 32 converts the voltage source to alternating current for enabling the continuous operation of the activated lamp under proper working conditions.
  • Capacitor 38 is connected in one terminal to Choke 32 and the other terminal in parallel to the alternating voltage power source. The purpose of capacitor 38 is to improve power coefficient.
  • the present invention relates to a system for the control of electrical power consumption.
  • this invention relates to a system for control and regulation of electrical power of loads such as street light installations, air conditioners, motors and the like.
  • a system for the control of voltage supplied by an AC source, across a load the system includes a load requiring a constant supply of voltage.
  • a load parallel inductor (LPI) is connected in parallel to the load.
  • At least two voltage incrementing/decrementing inductors are connectable in series to the load.
  • a control logic is used for controlling the state and intensity level of the load by determining the current applied to the load by accordingly changing the voltage supplied to the load.
  • Fig. 1 is a scheme of a prior art electric activation circuit of typical discharge lamp
  • Fig. 2A is a scheme of a street light branch showing a typical configuration of a plurality of street lamps, in which the present invention is to be implemented;
  • Fig. 2B is a block diagram of electrical consumer and a controller unit according to one embodiment of the present invention connected together;
  • Figs. 3A-3B is a flow chart showing failure detection in accordance with some embodiments of the present invention.
  • Fig. 4 is a schematic illustration of a voltage regulator and controller unit according to one embodiment of the present invention.
  • Fig. 5 is a more detailed schematic illustration of the voltage regulator and controller unit according to one embodiment of the present invention.
  • Fig. 6 is a scheme illustrating an exemplary circuitry of a zero AC voltage detector
  • each streetlight installation 40 includes lighting body 42, streetlight post 44 and lighting board, not shown.
  • Voltage regulator and controller unit (VRCU) 46 is typically installed on or near each street light installation 40.
  • Each VRCU is electrically connected to electric power line 47 of electrical power network 48 of either low or high voltage.
  • AC supply 50 feeds voltage to VRCU 48.
  • the AC voltage supply 50 is in the range of 100 to 240 volts, including tolerance usually +10 or -15 percent and commonly having a frequency of 50 Hz or 60 Hz.
  • the VRCU which is electrically connected to lighting body 42 controls the state and intensity level of at least one lighting body lamp, not shown, by determine the current to be applied to lighting body 42 and accordingly changing the input AC voltage 52 to lighting body 42. For example, the VRCU determines the nominal current of said lighting body 42. It should be noted that although the use of the VRCU is described with reference to street lights installations, it is not limited to such application. It can also be applied to other electrical consumers such as, air conditioners, motors and the like. In accordance with some embodiments of the present invention there is provided a method for detecting failure of lighting body 42 and in some embodiments, also repairing some such detected failures. Referring now to Figs.
  • VRCU is connected to power line and electrical parameters of the power line are measured. Assuming that the measured parameters of the power line are within prescribed limits, the VRCU connects to a load, and at step 60 the VRCU operates normally. At step 62 the electrical parameters of the controlled lighting body and the power line are measured. At step 64 the system compares the electrical parameters with a prescribed set, and if they are within prescribed limits, the VRCU continues working normally. If the electrical parameters are outside the limits, the VRCU electrically disconnected from load at step 65 and the power line is electrically connected directly to the lighting body.
  • the VRCU sends an alert at step 66 about the deviation from the limits.
  • electrical parameters are measured. If the VRCU detects that the AC current flowing through lighting body lamp is high (above the prescribed), the VRCU sends an alert at step 68.
  • the system assumes that the capacitor used for improving power coefficient is probably damaged and is replaced, or a new, functional one is added at step 69. In some embodiments of the present invention the added capacitor is included within the VRCU.
  • electrical parameters are measured.
  • the system compares the electrical parameters with a prescribed set, and if they are within prescribed limits, at step 72 the VRCU reconnects to the power source. If the electrical parameters are not within a prescribed set the system sends an alert at step 73.
  • step 74 If the current that flows through lighting body lamp is low a voltage increment is applied at step 74 and the VRCU is reconnected and electrical parameters are measured. If the electrical parameters are within limits, the VRCU operates normally back to step 60. If the electrical parameters are not within limits (i.e current still low), then if there are more available increments of voltage to apply then voltage is incremented by returning to step 74. If there are no more increments of voltage available then if the current that flows through lighting body lamp is either low or no current flows at all, the VRCU sends an alert at step 75. Then, at step 76 the lamp and/or the starter of the lighting body are replaced. If electrical parameters are within limits then the VRCU is reconnected to load at step 77. If the electrical parameters are not within limits an alert is sent at step 78.
  • the VRCU electrically disconnects itself from power line, but continues to measure the parameters, and the power line is electrically connected directly to the lighting body.
  • the VRCU will automatically reconnect itself between the power line and the lighting body when the measured parameters return to prescribed limits.
  • the alerts are displayed on a display which is includes in the VRCU 46 and/or in a data collection unit 100.
  • the power coefficient, cos are displayed on a display which is includes in the VRCU 46 and/or in a data collection unit 100.
  • ⁇ is measured for example, to determine in step 62 whether to disconnect the
  • the power coefficient is a value that measures the efficiency that energy is transferred from a power source to a load.
  • a voltage regulator and controller unit (VRCU) 46 of the present invention which includes a plurality of inductors, typically in the form of coils, 82 electrically connected to switching and controlling logic (SCL) 84.
  • Inductor 85 is electrically connected serially with one or more of the plurality inductors 82.
  • Inductors 82, 85 and 97 are wounded around a core 83 as known in the art of transformer production.
  • the inductors are insulated one from another as known in the art.
  • inductor 85 is wounded directly on core 83.
  • the entire arrangement of inductors, 85, and several inductors 82 are wound around a toroid core.
  • the VRCU further includes electrical parameters measuring unit (PMU) 91 that monitors the electrical load 88 and the power input .
  • the PMU can monitor for example the current that flows through electrical consumer, the voltage upon electrical consumer, the phase difference deference between the current and voltage and the harmonics of the fundamental AC signal that powers the electrical consumer.
  • the VRCU further includes zero AC voltage detector circuitry 89 which one of its inputs is connected in parallel to inductor In Fig. 5 the connections between the switches and inductors 82 are shown in some detail.
  • a plurality of switches such as relays 86 and/or triac switches and/or solid state relays, not shown, are connected to control logic 87.
  • Relays 86 includes electromagnets 88 connected to control logic 87.
  • Each switch 90 is connected to each inductor 82 respectively.
  • the wiring connections between switches 90, electromagnets 88 and control logic 87 are arranged such that each inductor from plurality of inductors 82 are connected in series with load parallel inductor (LPI) 85 when the respective switch from plurality of switches 90 of inductors 82 are turned on.
  • LPI load parallel inductor
  • the inductors values of inductors 82 can be equal to or differ from one another.
  • Fig. 6 there is shown the circuitry of an exemplary zero AC voltage detector (ZAVD) 89.
  • Resistor 94 connected in one terminal to the collector of transistor 96 whereas the other terminal is connected to a 5 volts DC power supply.
  • One terminal of resistor 98 is connected to the base of transistor 96 and the other terminal of resistor 98 is connected to rectifier circuitry 99.
  • the emitter of transistor 96 is connected to switching and controlling logic (SCL) 84.
  • SCL switching and controlling logic
  • rectifier 99 receives in its input AC voltage waveform 101 representing the power line AC signal.
  • Rectifier 99 converts the AC signal to a positive polarity waveform at its out put.
  • transistor 96 enters into its cut-off region and SCL 84 receives 5 volt DC in its input which serve as a an indication that 0 voltage has occurred.
  • the use of the circuitry of a zero AC voltage detector in association with a proper programmed logic enables to determine the frequency of the power line signal by finding out when the zero AC voltage occurred. For example, the VRCU can find out if the frequency of the power line signal is 50Hz or 60 Hz. Referring again to Fig.
  • LPI load parallel inductor
  • switches 90 When all of switches 90 are in off position, only LPI 85 is connected serially to power line source 104 and in parallel to load 88. Inductors 82 are disconnected from power line source 104.
  • LPI 85 imparts some beneficial properties to the system for example; it prevents inductors 82 from behaving like a choke when connected serially to load 88. Furthermore, LPI 85 assists in reducing harmonics of fundamental power line source 104 and preventing from the cos ⁇ to be reduced.
  • Control logic (CL) 87 activates one or more of relays 86.
  • the "zero" symbol 106 represents the natural wire 107 of power line source 104 and the "sine" symbol 108 represents phase wire 109 of the power line source 104.
  • the number of voltage decrements/increments depend on the number of inductors 82 available, the more such inductors are available, the finer the tuning of the voltage/current values supplied to load can be. . For example, in Fig.
  • SCL 84 can activate one or more of relays 86 substantially when the power line AC voltage waveform is 0 volts. This functionality is beneficial, as is contributes to an in increases relays life time and in protecting control logic 87 from undesired damaging voltage spikes.
  • a switch or a relay such as an electromagnetic relay typically have different response time in switching from the off state to the on state and and in reverse.
  • the response time of an electromagnetic relay to switch from off state to the on state is 10 msecs while the response time of the relay to switch from on state to the off state is 5 msec.
  • control logic 87 calculates the response time of relays 86 and accordingly activates relays 86. Over time, the response time of relays tends to change and to adjust that, in accordance with some embodiments of the present invention, the logic control monitors these changes by periodically calculating relays response time.
  • each VRCU is assigned a unique identification number.
  • the measured electrical parameters of lamp 36 or other electric consumer which are controlled or regulated by VRCU, are sent to central data collection unit 100.
  • the data about the measured electrical parameters received in that unit may be communicated by wire, wireless communication or by the electrical power line.
  • Data collection unit 100 processes the received data of each load 88 and accordingly optimizes the power that is sent to each load.
  • data collection unit 100 receives electrical parameters data about the power line in both situations, when the VRCU is connected and also when the VRCU is not connected to load 88.
  • the data collection unit 100 controls the VRCUs.
  • a VRCU in accordance with some embodiments of the present invention is activated/deactivated automatically in response to the natural light, i.e external light turns off the VRCU, etc.
  • Light pollution also known as photo-pollution or luminous pollution
  • Light pollution is a side effect of industrial civilization. Its sources include streetlights. Like other forms of pollution (such as air, water, and noise pollution) light pollution causes damage to the environment.
  • the implementation accordance to some embodiments of the present invention enables a reduction of street light pollution. Much in the same manner energy is saved by allowing the required power to flow through the load, and stopping excessive power flow, when unnecessary.
  • the present invention is particularly suited for permitting the application of a normal high voltage to loads such as streetlight lamps and to selectively reducing the voltage to each load to maintain such lights in a lighted condition.
  • Light street installation that operates in accordance with the present invention saves electric energy.
  • a unit in accordance with some embodiments of the present invention is small sized because it includes relatively small sized inductors that are utilized to reduce the AC power that is supplied to a load. This is because the system dealing only with the redundant energy.
  • the small size unit makes it easy to integrate such power consumption reducing unit into existing street lighting because the small package size can be easily accommodated in the existing lighting structure.
  • a unit in accordance with some embodiments of the present invention can measure electrical failures in the power line and the measured results can be further processed in data collection unit 100.

Landscapes

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

Abstract

La présente invention concerne un système pour la régulation de tension fournie par une source CA aux bornes d'une charge. Le système inclut une charge demandant une alimentation constante en tension. Une bobine d’inductance parallèle de charge (LPI) est reliée en parallèle à la charge et il est possible de relier en série à la charge au moins deux bobines d'inductance augmentant/diminuant la tension. Le système comprend en outre une logique de commande qui est utilisée pour régler le niveau d'intensité de la charge en déterminant le courant appliqué à la charge en modifiant en conséquence la tension appliquée à la charge. De plus, un module de notification de pannes est utilisé pour alerter une unité de recueil des pannes.
PCT/IB2009/051243 2008-03-25 2009-03-25 Régulation de puissance et son système de commande WO2009118696A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7060108P 2008-03-25 2008-03-25
US61/070,601 2008-03-25

Publications (1)

Publication Number Publication Date
WO2009118696A1 true WO2009118696A1 (fr) 2009-10-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/051243 WO2009118696A1 (fr) 2008-03-25 2009-03-25 Régulation de puissance et son système de commande

Country Status (1)

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WO (1) WO2009118696A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466169A1 (fr) * 1979-09-20 1981-03-27 Nicolas Jean Pierre Montage d'alimentation variable pour lampes a decharge haute-pression
US6191568B1 (en) * 1999-01-14 2001-02-20 Franco Poletti Load power reduction control and supply system
US20040204917A1 (en) * 1997-04-16 2004-10-14 A.L. Air Data Lamp monitoring and control system and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466169A1 (fr) * 1979-09-20 1981-03-27 Nicolas Jean Pierre Montage d'alimentation variable pour lampes a decharge haute-pression
US20040204917A1 (en) * 1997-04-16 2004-10-14 A.L. Air Data Lamp monitoring and control system and method
US6191568B1 (en) * 1999-01-14 2001-02-20 Franco Poletti Load power reduction control and supply system

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