An elevator system includes a first elevator car (28) constructed and arranged to move in a first lane (30, 32, 34) and a first propulsion system (40) constructed and arranged to propel the first elevator. An electronic processor of the elevator system is configured to selectively control power delivered to the first propulsion system (40). The electronic processor includes a software-based power estimator configured to receive a first weight signal and a nm trajectory signal for calculating a power estimate and comparing the power estimate to a maximum power allowance. The electronic processor is configured to output an automated command signal if the power estimate exceeds the maximum power allowance.

A method and a system for modernizing an elevator installation including two or more elevators includes an unmodernized elevator, one or more call-giving devices, a new group controller, which is connected to the elevator installation for allocating an elevator call to be given with a call-giving device to be served by an elevator belonging to the elevator installation, and also a measuring device, which is configured to measure an operating parameter of an unmodernized elevator. The aforementioned measuring device is connected to the new group controller for communicating the aforementioned operating parameter to the new group controller.

A method for controlling an elevator group including at least a first elevator and a second elevator, wherein a counterweight balance of the first elevator differs from a counterweight balance of the second elevator, the method including: controlling the elevator group; determining threshold loads for the first and second elevator separately for up and down direction, a threshold load being dependent of the counterweight balance of the corresponding elevator, wherein the threshold load being a load for which consumed energy per up-down run is approximately zero; and controlling, when allocating an elevator in response to a destination call, route determination for the first and second elevator involves minimizing a load difference from the threshold loads.

Call information can be used for scheduling runs of elevators in a group of elevators. The scheduling is done so that based on the call allocations a schedule of expected movements, accelerations and decelerations can be computed. Then the movements, accelerations and decelerations may be controlled in order to improve energy efficiency or for controlling the movement in such manner that the energy consumption peaks or duration of these peaks is reduced.

According to one aspect, there is provided a method for controlling an elevator group including at least a first elevator and a second elevator, wherein a counterweight balance of the first elevator differs from a counterweight balance of the second elevator, the method including: controlling the elevator group comprising at least the first elevator and the second elevator; determining threshold loads for the first and second elevator separately for up and down direction, a threshold load being dependent of the counterweight balance of the corresponding elevator, wherein the threshold load being a load for which consumed energy per up-down run is approximately zero; and controlling, when allocating an elevator in response to a destination call, route determination for the first and second elevator comprises minimizing a load difference from the threshold loads.

An aspect includes a system with an energy storage device configured to provide electrical power to a conveyance apparatus of a conveyance system, a power management system configured to determine a charging schedule to recharge the energy storage device based at least in part on a status of the conveyance system, and a dispatching system configured to modify a dispatch schedule of the conveyance system based at least in part on the charging schedule.

The invention relates to a method for controlling a passenger transport system, which transport system comprises at least two passenger conveyors, as e.g. escalators or elevators, which transport system comprises a control for the passenger conveyors and for controlling passenger flow in the transport system. The control is connected to a passenger flow determination device for establishing a passenger flow reference value of the actual passenger flow to be expected in the passenger transport system, and which control further comprises a passenger guide system for controlling passenger flow in the transport system, which passenger guide system uses a cost function considering a set of system control parameters as passenger riding time, energy consumption, passenger waiting time, passenger transport capacity, maintenance demand, etc. The control uses a transport model simulating the function of the hardware components of the transport system under consideration of correlated system operating parameters as e.g. number of active passenger conveyors, passenger conveyor speed, still-stand times, door opening times etc. in connection with passenger flow,

whereby the passenger flow reference value is input to the transport model and in an optimization process the system operating parameters are optimized under use of the transport model to meet the passenger flow reference value under consideration of at least one significant system control parameter from said set of system control parameters to achieve a best set of system operating parameters. The best set of system operating parameters is applied to the control of the passenger transport system.

Elevator system passengers are transported in one or more of a plurality of elevator cars. The elevator cars can require different amounts of energy to operate. Passenger trips can be allocated to one car or another car based on the expected energy consumption for the trips in one or the other car.

A method for allocating elevators in an elevator system, the elevator system including a group control system responsive to hall calls received from call input devices, and elevator-specific elevator controllers configured to control elevators based on commands issued by the group control system, wherein the method including generating a number of route alternatives based on calls active; calculating, by the elevator controllers, elevator-specific cost terms associated with the route alternatives; transmitting, by the elevator controllers, the cost terms to the group control system; and allocating, by the group control system, the hall calls to the elevators according to the route alternative giving the lowest allocation cost.

An elevator installation with an elevator unit, which is connected with a power supply mains, is controllable by an elevator control with consideration of first control information based on local requirements of users. The elevator control receives from the power supply mains second control information containing status data for the power supply mains. The first and second control information is evaluated by the elevator control. The elevator control influences operation, which is determined by the first control information, of the elevator installation in dependence on the second control information so as to enable desired operation in terms of energy. A monitoring unit, which determines status data for the power supply mains and provides information for the consumers, is connectible with the power supply mains. The monitoring unit creates second control information for the elevator control in dependence on loading of the power supply mains.