Abstract: A simulation method run on a computer simulating the characteristics of a real controlled device including a heating apparatus that changes a heating value in accordance with a first manipulated value, includes creating a controlled-device model representing the real controlled device where a first manipulated value is an input and a process value for the real controlled device is an output, acquiring a first time-related characteristic as input to the controlled-device model, and calculating a second time-related characteristic from the output from the controlled device model with respect to the input of the first time-related characteristic. The controlled-device model includes a heating component corresponding to the heating apparatus for increasing the process value in accordance with the size of a first manipulated value.

Abstract: A controller having an auto-tuning function has a manipulated value determination unit that selectively determines a first manipulated value for causing a first change in a controlled value of a controlled object or a second manipulated value for causing a second change opposite to the first change in the controlled value, in accordance with a preset parameter, so that a process value obtained from the controlled object follows a target value, and a tuning unit that alternately outputs the first manipulated value and the second manipulated value in accordance with the process value, and that determines the parameter from a response characteristic obtained through the alternate output. The tuning unit successively changes a magnitude of the first manipulated value each time output is switched during the alternate output of the first manipulated value and the second manipulated value.

Abstract: A distributed power supply that enables a user to easily determine whether or not a ground fault that has occurred is a received ground fault when a ground fault occurs is provided. A distributed power supply connected to a single-phase three-wire distribution line includes a power generation device, an alternating current generation circuit that generates an alternating current to be supplied between a W-phase wire and a U-phase wire of the single-phase three-wire distribution line on the basis of an output of the power generation device, a ground voltage detection circuit that detects a ground voltage of a non-grounded portion in the alternating current generation circuit, and an output part that outputs detection result information indicating a detection result of the ground voltage of the ground voltage detection circuit.

Abstract: A simulation method run on a computer simulating the characteristics of a real controlled device including a heating apparatus that changes a heating value in accordance with a first manipulated value, includes creating a controlled-device model representing the real controlled device where a first manipulated value is an input and a process value for the real controlled device is an output, acquiring a first time-related characteristic as input to the controlled-device model, and calculating a second time-related characteristic from the output from the controlled device model with respect to the input of the first time-related characteristic. The controlled-device model includes a heating component corresponding to the heating apparatus for increasing the process value in accordance with the size of a first manipulated value.

Abstract: A controller having an auto-tuning function has a manipulated value determination unit that selectively determines a first manipulated value for causing a first change in a controlled value of a controlled object or a second manipulated value for causing a second change opposite to the first change in the controlled value, in accordance with a preset parameter, so that a process value obtained from the controlled object follows a target value, and a tuning unit that alternately outputs the first manipulated value and the second manipulated value in accordance with the process value, and that determines the parameter from a response characteristic obtained through the alternate output. The tuning unit successively changes a magnitude of the first manipulated value each time output is switched during the alternate output of the first manipulated value and the second manipulated value.

Abstract: The air conditioning information estimation device estimates the amount of power consumed by an air conditioner which adjusts the temperature in a room based on a temperature set-point. The air conditioning information estimation device has a storage unit configured to store a temperature set-point, and a power consumption amount specification unit configured to specify the energy consumption amount of the air conditioner during a prescribed period during which the air conditioner performs air conditioning.

Abstract: An energy consumption improvement calculation apparatus calculates an amount of room-for-improvement that is an improvable amount of power consumption of at least one target device. A cycle use section of the energy consumption improvement calculation apparatus uses measured values and measurement times of power consumption and a fluctuating cycle of power consumption which fluctuates periodically.