Patents Assigned to Long Island Lighting Company
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Patent number: 5701226Abstract: The present invention relates to an apparatus and method for distributing electrical power from power substation circuits. The apparatus of the present invention is responsive to overcurrent conditions and selectively actuates a switching network so as to restore power to at least a portion of the users connected to the faulty circuit of the power distribution system.Type: GrantFiled: January 29, 1996Date of Patent: December 23, 1997Assignee: Long Island Lighting CompanyInventors: Lawrence J. Gelbien, Philip B. Andreas, Werner J. Schweiger
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Patent number: 5626989Abstract: A storage battery having various cell constructions to increase the surface-to-weight ratio of active material exposed to electrolyte ions, to reduce internal resistance, and to extend the life of the battery is provided. One configuration for the battery cell utilizes pleated positive and negative plates which are monolithically coupled to respective electrodes. Another configuration for the battery cell utilizes a single positive plate and a single negative plate which are interrelated in, for example, a serpentine configuration.Type: GrantFiled: November 22, 1994Date of Patent: May 6, 1997Assignee: Long Island Lighting CompanyInventor: George J. Doundoulakis
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Patent number: 5621654Abstract: The present invention relates to methods and systems for economically dispatching electrical power. The present invention utilizes real-time heat rates for a plurality of power generating units, e.g., steam turbines, and corresponding emission data for each unit, to dispatch electrical power at the lowest possible cost. The method of the present invention also compares the cost associated with generating power to the cost to purchase power from other electric utilities to achieve maximum cost savings associated with the dispatching of the electrical power.Type: GrantFiled: April 15, 1994Date of Patent: April 15, 1997Assignee: Long Island Lighting CompanyInventors: Jason M. Cohen, Douglas B. Page
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Patent number: 5548166Abstract: An electric device is provided as an interface between a permanent power source and an electrical appliance for maintaining the appliance, or a component thereof, in an operative state during a momentary power failure. The electric circuit includes an auto-transformer for increasing the induced back electric magnetic field voltage which is present in the line voltage of the permanent power source during a momentary power outage. The auto-transformer increases the induced back electric magnetic field voltage to a voltage level which is sufficient to maintain digital clocks or other low power-requiring components incorporated in an electrical appliance in an operative state during a momentary power outage.Type: GrantFiled: December 9, 1993Date of Patent: August 20, 1996Assignee: Long Island Lighting CompanyInventor: Ralph Stolowicki
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Patent number: 5539651Abstract: The present invention relates to a system and method for determining the effects of linear and nonlinear loads on electrical power systems. The invention utilizes stored load characteristic data in terms of current spectra at predefined voltage values and network impedances to determine the voltage drop between an electrical substation bus and an electrical load bus. The actual load voltage is determined by an iteration technique which takes the difference between a collected substation voltage and the voltage drop and compares the result of the difference to an estimated load voltage. For each iteration the estimated load voltage is re-estimated until the difference result equals the estimated voltage, thereby determining the actual load voltage. Knowing the actual load voltage, permits determination of actual current and power values which are compared to collected substation current and power values. If the values are equal, the effects of the harmonics are known.Type: GrantFiled: December 9, 1993Date of Patent: July 23, 1996Assignee: Long Island Lighting CompanyInventors: Zivan Zabar, Ralph Mancini, Leo Birenbaum
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Patent number: 5515692Abstract: A device and method is provided for automatically defrosting a refrigeration system. The present invention includes a microprocessor which initiates a defrost cycle during a time of day which is most efficient for the refrigerator and the utility company. Moreover, the defrost cycle is initiated during a time of day which has the least impact on food stored within the microprocessor. The microprocessor is programmed and enabled so as to analyze the power consumption of the refrigerator during a 24 hour period, and from this analysis, the microprocessor is able to determine the time of day and period(s) of time which will be most efficient for the initiation of a defrost cycle.Type: GrantFiled: April 3, 1995Date of Patent: May 14, 1996Assignee: Long Island Lighting CompanyInventors: Frank W. Sterber, Daniel R. Stettin
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Patent number: 5513061Abstract: The present invention relates to an apparatus and method for distributing electrical power from power substation circuits. The apparatus of the present invention is responsive to overcurrent conditions and selectively actuates a switching network so as to restore power to at least a portion of the users connected to the faulty circuit of the power distribution system.Type: GrantFiled: December 9, 1993Date of Patent: April 30, 1996Assignee: Long Island Lighting CompanyInventors: Lawrence J. Gelbien, Philip B. Andreas, Werner J. Schweiger
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Patent number: 5448907Abstract: Apparatus for detecting fluid flow across an article is provided in which the article is received in a sealed chamber and protrudes into ambient surroundings from the chamber that is sealed. Any fluid flow through the article between the ambient surroundings and the sealed chamber can be detected after a pressure differential across the article is generated.Type: GrantFiled: December 9, 1993Date of Patent: September 12, 1995Assignee: Long Island Lighting CompanyInventors: Richard A. Jensen, Anthony M. Agnone
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Patent number: 5444820Abstract: A hybrid fuzzy logic/neural network prediction system and method is disclosed for predicting response times to service requests to a service provider. Data from a historical database of records including customer requests and weather information are input to the hybrid system. The data is filtered to reject faulty data entries and data not necessarily useful for predicting response times to service requests such as customer comments are eliminated. A backpropagation neural network operating in a supervised learning mode is employed to decrease the effects of the inherent system nonlinearities. The prediction error from the neural network is trained to make predictions within a predetermined error limit. The neural network generates a prediction configuration; i.e. a set of neural network characteristics, for every record per geographical area, time frame, and month. A fuzzy logic classifier is used for further data reliability.Type: GrantFiled: December 9, 1993Date of Patent: August 22, 1995Assignee: Long Island Lighting CompanyInventors: Anthony Tzes, Vassilis Tsotras
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Patent number: 5415005Abstract: A device and method is provided for automatically defrosting a refrigeration system. The present invention includes a microprocessor which initiates a defrost cycle during a time of day which is most efficient for the refrigerator and the utility company. Moreover, the defrost cycle is initiated during a time of day which has the least impact on food stored within the microprocessor. The microprocessor is programmed mid enabled so as to analyze the power consumption of the refrigerator during a 24 hour period, and from this analysis, the microprocessor is able to determine the time of day and period(s) of time which will be most efficient for the initiation of a defrost cycle.Type: GrantFiled: December 9, 1993Date of Patent: May 16, 1995Assignee: Long Island Lighting CompanyInventors: Frank W. Sterber, Daniel R. Stettin