WO2010059138A1 - Délestage de charge d'élévateur à la demande - Google Patents

Délestage de charge d'élévateur à la demande Download PDF

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Publication number
WO2010059138A1
WO2010059138A1 PCT/US2008/012873 US2008012873W WO2010059138A1 WO 2010059138 A1 WO2010059138 A1 WO 2010059138A1 US 2008012873 W US2008012873 W US 2008012873W WO 2010059138 A1 WO2010059138 A1 WO 2010059138A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
elevator
request
elevator system
power distribution
Prior art date
Application number
PCT/US2008/012873
Other languages
English (en)
Inventor
William A. Veronesi
Stella M. Oggianu
Original Assignee
Otis Elevator Company
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 Otis Elevator Company filed Critical Otis Elevator Company
Priority to CN2008801320546A priority Critical patent/CN102216863A/zh
Priority to EP08878315.4A priority patent/EP2366132B1/fr
Priority to JP2011536291A priority patent/JP2012509233A/ja
Priority to PCT/US2008/012873 priority patent/WO2010059138A1/fr
Priority to US13/123,967 priority patent/US20110208360A1/en
Priority to ES08878315.4T priority patent/ES2549126T3/es
Publication of WO2010059138A1 publication Critical patent/WO2010059138A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
    • B66B1/302—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor for energy saving
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/58—The condition being electrical
    • H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
    • 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
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

Definitions

  • the present invention relates to operation of elevator systems.
  • the present invention relates to operation of an elevator system during a time period when a demand of electrical energy from a power utility exceeds generating capacity.
  • Power utilities generate electrical power and distribute that power over a power distribution grid to customers. Power is supplied to residential, commercial, office, manufacturing, and other buildings of small to very large size.
  • An example may occur in midsummer, during periods of relatively high heat, when high electrical energy consumption occurs through the operation of air conditioning equipment.
  • the power utilities that distribute power over the grid have few attractive options.
  • a power utility can lower the voltage on the grid in an attempt to lower power consumption, but this has several problems. First, lowering the voltage can damage equipment attached to the grid. Second, for some old, and for many newer electrical devices attached to the grid, voltage is automatically compensated, so that actual power demand is not decreased.
  • a more desirable solution is to selectively remove equipment from the grid without causing major disruption to grid power customers.
  • the selective removal can be done by public announcements requesting customers to turn off nonessential loads during periods of high electrical demand. That approach depends upon the message being received by customers, and the customers complying with the request.
  • HVAC heating ventilation and air conditioning
  • Power utilities can selectively and remotely change thermostat settings in buildings of selected customers in order to reduce or remove HVAC or certain internal building loads. Those customers typically benefit by reduced utility rates, or some other incentive from the power utility. Elevators can represent a significant fraction of the power demand of a building. Unlike an HVAC system, the typical elevator system cannot be simply disconnected from the utility power grid without adversely effecting building operations. If the power utility could turn off the elevator system without warning, elevator cars could be stopped between floors, and passengers trapped within those cars until power is restored. The ability for a power utility to remove elevator loads without impacting the operation of a building has not been available.
  • An elevator system with a secondary power storage device is capable of automatically shifting between utility grid power, a combination of utility grid power and secondary (grid-independent) power, and secondary power only upon request from a power utility.
  • a request to reduce electrical demand of a building is received, power to the elevator system from a power distribution system that delivers power from the power utility is reduced, and the secondary power storage device is connected to the elevator system.
  • the elevator system operates using power from the secondary power storage device alone or in conjunction with reduced grid power.
  • the elevator system receives increased power from the power utility.
  • the Figure is a block diagram illustrating a building receiving electrical power from a power utility, and having an elevator system that is capable of switching to a grid-independent source of electrical energy upon request of the power utility.
  • the Figure is a block diagram of power distribution system 10, which includes power utility 12, power distribution system or grid 14, and building 16, which represents one of many customers of power utility 12 that receive electrical energy from power distribution grid 14.
  • Building 16 includes energy management system 18, non- elevator electrical loads 20, and elevator system 22 (which includes converter 24, DC power bus 26, inverter 28, hoist motor 30, elevator car 32, counterweight 34, roping 36, controller 38, and grid-independent power source 40).
  • Non-elevator loads 20 include various electrical systems and electrically powered systems within building 16. Loads 20 may include, for example, HVAC systems, lighting systems, electronic equipment such as computers and other office and business equipment, manufacturing equipment, and other electrical loads depending upon the nature of the use of building 16. For example, in a manufacturing plant, loads 20 will typically include motors and other electrically powered equipment used in manufacturing processes.
  • Power converter 24 and power inverter 28 are connected by power bus 26 to form a regenerative elevator drive.
  • Power distribution grid 14 provides electrical power to power converter 24 under normal operating conditions.
  • Power converter 24 is a three-phase power inverter that is operable to convert three-phase AC power from grid 14 to DC power.
  • power converter 24 comprises a plurality of power circuits that are connected to controller 38 to receive pulse width modulation (PWM) gating pulses. Controller 38 controls the power circuits to convert the three-phase AC power from grid 14 to DC output power.
  • PWM pulse width modulation
  • Controller 38 controls the power circuits to convert the three-phase AC power from grid 14 to DC output power.
  • the DC output power is provided by power converter 24 on power bus 26. It is important to note that while grid 14 has been described as delivering three- phase AC power, in some cases the power available from grid 14 may be a single phase AC power or even DC power.
  • controller 38 employs pulse width modulation (PWM) to produce gating pulses so as to periodically switch the transistors of power converter 24 to provide a three-phase AC power signal to grid 14. This regenerative configuration reduces the power demand by up to building 16 on grid 14.
  • PWM pulse width modulation
  • Power inverter 28 is a three-phase power inverter that is operable to invert DC power from power bus 26 to three-phase AC power.
  • Power inverter 28 comprises a plurality of power circuits.
  • Controller block 38 controls the power circuits to invert the DC power on power bus 26 to three-phase AC output power.
  • the three-phase AC power at the outputs of power inverter 28 is provided to hoist motor 30.
  • controller 38 employs PWM to produce gating pulses to periodically switch transistors of power inverter 28 to provide three-phase AC power to hoist motor 30.
  • Controller 38 may vary the speed and direction of movement of elevator car 32 by adjusting the phase, frequency and magnitude of the gating pulses to power inverter 28.
  • the power circuits of power inverter 28 are operable to rectify power that is regenerated when movement of elevator car 32 and counterweight 34 drives hoist motor 30.
  • controller 38 controls the transistors in power inverter 28 to allow the regenerated power to be converted from AC to DC and provided to DC power bus 26.
  • Hoist motor 30 controls the speed and direction of movement between elevator car 32 and counterweight 34.
  • the power required to drive hoist motor 30 varies with the acceleration and direction of elevator car 32, as well as the load in elevator car 32. For example, if elevator car 32 is being accelerated, run up with a load greater than the weight of counterweight 34 (i.e., heavy load), or run down with a load less than the weight of counterweight 34 (i.e., light load), power is required to drive hoist motor 30. If elevator car 32 is leveling or running at a fixed speed with a balanced load, it may be using a lesser amount of power.
  • hoist motor 30 regenerates three-phase AC power that is converted to DC power by power inverter 28 under the control of controller 38.
  • the converted DC power may be returned to grid 14, supplied to grid-independent power source 40 for storage, and/or dissipated in a dynamic brake resistor (not shown) connected to power bus 26.
  • elevator system 22 can include multiple hoist motors 30, cars 32, and counterweights 34.
  • a plurality of power inverters 28 may be connected in parallel to power bus 26 to provide power to a plurality of hoist motors 30.
  • grid-independent power source 40 is shown connected to DC power bus 26, power source 40 could alternatively be connected to one phase of the three phase input of power converter 24.
  • Grid-independent power source 40 may be an energy storage system, or may be a backup power source such as a generator.
  • Grid-independent power source 40 may include one or more devices capable of storing electrical energy that are connected in series or parallel.
  • power source 40 includes at least one supercapacitor, which may include symmetric or asymmetric supercapacitors.
  • power source 40 includes at least one secondary or rechargeable battery, which may include any of nickel-cadmium (NiCd), lead acid, nickel-metal hydride (NiMH), lithium ion (Li- ion), lithium ion polymer (Li-Poly), iron electrode, nickel-zinc, zinc/alkaline/manganese dioxide, zinc-bromine flow, vanadium flow, and sodium-sulfur batteries, or other commercially available batteries.
  • other types of electrical or mechanical devices such as flywheels, can be used to store energy.
  • Power source 40 may include one type of storage device or may include combinations of storage devices.
  • Controller 38 controls operation of converter 24, inverter 28, and grid- independent power source 40. It may also receive feedback signals from converter 24, inverter 28, and power source 40, or from sensors associated with those devices. Controller 38 also controls when elevator system 22 will operate using power from power distribution grid 14, and when elevator 22 will operate using power supplied by grid-independent power source 40.
  • power utility 12 has the ability to request that building 16 reduce power demand on grid 14.
  • Communication link 42 allows power utility 12 to communicate with energy management system 18.
  • Communication link 42 may be, for example, an internet connection, a phone line connection, or wireless network connection such as a cell phone or pager type connection.
  • a request may be sent over communication link 42 to building 16 to turn off certain loads, or to modify operation so that electrical power demand is reduced.
  • energy management system 18 may provide different control set points to HVAC systems operating within building 16, so that energy consumption is reduced.
  • nonessential devices or systems among loads 20 may be turned off entirely until the request from power utility 12 is no longer in effect.
  • any reduction in consumption of grid power should not interrupt elevator service so that passengers are stranded on floors or trapped in an elevator car that is stopped between floors.
  • energy management system 18 receives a request from power utility 12 to reduce power demand on grid 14, it provides a signal to controller 38 of elevator system 22. Controller 38 will then determine whether it is possible for elevator system 22 to switch to grid-independent operation using power from power source 40. In addition, controller 38 may estimate, based upon signals from grid- independent power source 40, how long elevator system 22 may operate in a grid- independent mode. Controller 38 monitors the state of any energy storage or independent energy supply used by grid-independent power source 40 in order to determine whether to accept a request from energy management system 18 to switch from grid-dependent to grid- independent operation. For example, when grid-independent power source 40 is an electrical energy storage system, controller 38 may monitor voltage, current, and temperature to determine a state-of-charge of the storage system, from which a determination of available energy (and estimated operating time) can be made.
  • controller 38 may disable converter 24, or may open a switch, so that converter 24 cannot receive power from grid 14. Controller 38 also connects grid-independent power source 40 to DC power bus 26 or to an input converter 24.
  • controller 38 continues to monitor energy available from grid-independent power source 40. When available energy drops below a predefined or estimated limit, controller 38 signals energy management system 18 that it is no longer capable of grid-independent operation, and will transition elevator system 22 back to grid-dependent operation. Depending on the request received by energy management system 18 over communication link 42, and the state of power available on grid 14, controller 38 may cause elevator system 22 to safely shut down, rather than operating with insufficient power from grid 14. Alternatively, elevator system 22 may continue to operate in a regenerative mode until people within the building are at a safe level.
  • a request from the power utility may cause energy management system 18 to select a hybrid mode of operation of elevator system 22, in which power is supplied jointly from grid 14 and from grid-independent power source 40.
  • power source 40 can be used to provide more power than usual, or to reduce peaks from the utility. This allows elevator system 22 to be connected to the grid but using power from the grid at a reduced level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Elevator Control (AREA)

Abstract

L'invention concerne, lors d'une requête d'un réseau électrique pour une diminution de la demande électrique d'un bâtiment, un système d'élévateur qui est automatiquement déconnecté de la puissance délivrée par le réseau électrique (ou qui reste connecté, mais qui reçoit une puissance limitée depuis le réseau électrique), et un dispositif de stockage d'énergie électrique secondaire est connecté au bus de puissance du système d'élévateur. Le dispositif de stockage d'énergie électrique secondaire fournit de la puissance au système d'élévateur pendant une période durant laquelle la requête d'une réduction de la charge électrique du bâtiment est en cours. Lorsque la requête se termine, le système d'élévateur est reconnecté automatiquement à la puissance délivrée par le réseau électrique et peut fonctionner potentiellement dans un mode hybride.
PCT/US2008/012873 2008-11-18 2008-11-18 Délestage de charge d'élévateur à la demande WO2010059138A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN2008801320546A CN102216863A (zh) 2008-11-18 2008-11-18 响应要求的电梯负荷削减
EP08878315.4A EP2366132B1 (fr) 2008-11-18 2008-11-18 Délestage de charge d'élévateur à la demande
JP2011536291A JP2012509233A (ja) 2008-11-18 2008-11-18 オンデマンド式エレベータ負荷制限
PCT/US2008/012873 WO2010059138A1 (fr) 2008-11-18 2008-11-18 Délestage de charge d'élévateur à la demande
US13/123,967 US20110208360A1 (en) 2008-11-18 2008-11-18 On demand elevator load shedding
ES08878315.4T ES2549126T3 (es) 2008-11-18 2008-11-18 Desconexión de carga bajo demanda en un ascensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2008/012873 WO2010059138A1 (fr) 2008-11-18 2008-11-18 Délestage de charge d'élévateur à la demande

Publications (1)

Publication Number Publication Date
WO2010059138A1 true WO2010059138A1 (fr) 2010-05-27

Family

ID=42198378

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/012873 WO2010059138A1 (fr) 2008-11-18 2008-11-18 Délestage de charge d'élévateur à la demande

Country Status (6)

Country Link
US (1) US20110208360A1 (fr)
EP (1) EP2366132B1 (fr)
JP (1) JP2012509233A (fr)
CN (1) CN102216863A (fr)
ES (1) ES2549126T3 (fr)
WO (1) WO2010059138A1 (fr)

Cited By (3)

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CN102205920A (zh) * 2011-03-28 2011-10-05 江苏通用电梯有限公司 基于无线传感器网络的电梯直流微网能量管理系统
JP2013129528A (ja) * 2011-12-22 2013-07-04 Hitachi Ltd エレベーター情報処理装置
WO2014162056A1 (fr) * 2013-03-30 2014-10-09 Kone Corporation Empêchement de l'utilisation d'un ascenseur pendant une période donnée de panne électrique

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RU2490201C2 (ru) * 2008-08-15 2013-08-20 Отис Элевэйтор Компани Система питания лифта и здания с управлением вторичным источником питания
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US8924034B2 (en) * 2011-09-01 2014-12-30 Sharp Laboratories Of America, Inc. Energy management system
US9691111B2 (en) * 2012-01-06 2017-06-27 Aclara Meters Llc Systems, methods, and apparatus for determining energy savings
JP5955664B2 (ja) * 2012-06-28 2016-07-20 株式会社日立製作所 エレベータ群管理システム
JP5951421B2 (ja) * 2012-09-10 2016-07-13 株式会社日立製作所 エレベータ群管理システム
JP5847066B2 (ja) * 2012-12-07 2016-01-20 東芝エレベータ株式会社 昇降機を備えた建物の電力システム
JP5645323B2 (ja) * 2013-03-07 2014-12-24 東芝エレベータ株式会社 エレベータ制御装置
WO2017014763A1 (fr) * 2015-07-22 2017-01-26 United Technologies Corporation Compensation de profil d'énergie en utilisant une action directe avec une liaison filaire ou sans fil
EP3156358A4 (fr) * 2015-08-07 2017-12-13 Forward Electronics Company Limited Dispositif de secours et d'économie d'énergie automatique d'ascenseur et procédé de commande pour ce dernier, et module de supercondensateur
US10294070B2 (en) * 2015-11-18 2019-05-21 Premco, Inc. Regenerative electrical power supply for elevators
EP3475205A4 (fr) * 2016-06-28 2020-04-01 KONE Corporation Arrangement d'alimentation
EP3480152B1 (fr) * 2017-11-07 2022-01-05 KONE Corporation Gestion d'énergie d'un système de transport de passagers
US10381968B2 (en) 2017-12-05 2019-08-13 Otis Elevator Company Converter pulse width modulation strategies for three phase regenerative drives
CN114744668A (zh) * 2022-02-28 2022-07-12 浙江埃克森电梯有限公司 一种电梯用能量反馈装置
WO2023203067A1 (fr) 2022-04-20 2023-10-26 Inventio Ag Stockage d'énergie connecté, système d'ascenseur et procédés

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Publication number Priority date Publication date Assignee Title
CN102205920A (zh) * 2011-03-28 2011-10-05 江苏通用电梯有限公司 基于无线传感器网络的电梯直流微网能量管理系统
JP2013129528A (ja) * 2011-12-22 2013-07-04 Hitachi Ltd エレベーター情報処理装置
WO2014162056A1 (fr) * 2013-03-30 2014-10-09 Kone Corporation Empêchement de l'utilisation d'un ascenseur pendant une période donnée de panne électrique

Also Published As

Publication number Publication date
EP2366132A1 (fr) 2011-09-21
US20110208360A1 (en) 2011-08-25
EP2366132A4 (fr) 2014-01-08
ES2549126T3 (es) 2015-10-23
CN102216863A (zh) 2011-10-12
EP2366132B1 (fr) 2015-09-23
JP2012509233A (ja) 2012-04-19

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