The disclosure describes techniques for providing meter-to-transformer connectivity information and/or correction, using voltage-correlation, distance, and/or address data. In an example, a meter generates a time-series of voltage-changes. Transformers geographically close enough to the meter are assigned a time-series of voltage-changes. Pearson's Correlation Coefficient (PCC) values of the meter with respect to individual transformers are determined. A reference PCC value of the meter is set to be an average of a largest and a second largest PCC value from among the PCC values of the meter. Voltage-correlation confidence rating (VCCR) values for the meter with respect to each transformer that is within the threshold distance from the meter are calculated using the PCC. Based at least in part on the VCCR values for the meter with respect to each transformer that is within the threshold distance from that meter, a probability of the meter being connected to each transformer is determined.

A battery management apparatus can include a measuring unit configured to measure a voltage and a current of a battery cell, a calculating unit configured to determine an operating period of the battery cell based on the current of the battery cell, and calculate a comparison value for the battery cell by normalizing the voltage of the battery cell, and a diagnosing unit configured to diagnose a state of the battery cell by comparing a comparison value of the battery cell with a reference value.

An individual ECU controls power supply through a wire W. A microcomputer of the individual ECU increases an average value of a wire current value of a current flowing through the wire W in a stepwise manner. The microcomputer determines, every time that the average value of a wire current value is increased, whether or not an anomaly has occurred in power supply through the wire (W) based on a temperature difference between a wire temperature of the wire (W) and an environmental temperature in an area surrounding the wire (W).

An electronic power connector including a contact and a contact core. The contact is configured to electrically connect a power supply to a load. The contact core is configured to receive the contact. The contact core includes a transformer winding configured to sense a current and a sensor slot configured to receive a sensor. In some embodiments, the sensor is configured to sense a temperature. In some embodiments, the sensor is configured to sense a voltage.

Harmonics are generated when pulse width modulation is carried out with an asymmetrical triangular wave as a carrier signal in a power conversion device. In order to restrict these harmonics, a command value is corrected in advance so as to be distorted, a gate signal of a switching operation is determined lasing a post-correction command value and an asymmetrical carrier signal, and pulse width modulation is carried out, whereby an output voltage or output current with no distortion is obtained.

An apparatus includes a power switch configured to conduct a dc or ac current, a sense switch having a first drain/source terminal and a gate connected to a first drain/source terminal and a gate of the power switch respectively, an amplifier having a first input coupled to a second drain/source terminal of the power switch and a second input coupled to a second drain/source terminal of the sense switch and a first current sense processing switch having a gate connected to an output of the amplifier.

A method for controlling an electrochromic device is provided. The method includes applying a constant supply current to the electrochromic device and determining an amount of charge transferred to the electrochromic device, as a function of time and current supplied to the electrochromic device. The method includes ceasing the applying the constant supply current, responsive to a sense voltage reaching a sense voltage limit and applying one of a variable voltage or a variable current to the electrochromic device to maintain the sense voltage at the sense voltage limit, responsive to the sense voltage reaching the sense voltage limit. The method includes terminating the applying the variable voltage or the variable current to the electrochromic device, responsive to the determined amount of charge reaching a target amount of charge.

A method for monitoring a bank of ultracapacitors configured to power an alternating current (AC) pitch motor of a pitch system in a wind turbine is provided. The method includes obtaining, by one or more control devices, data indicative of a voltage associated with the bank of ultracapacitors. The method includes conducting, by the one or more control devices, a test operation of the bank of ultracapacitors at predetermined intervals of time to determine a capacitance associated with the bank of ultracapacitors. The method further includes performing, by the one or more control devices, one or more control actions based, at least in part, on the capacitance or the data indicative of the voltage.

There is proposed a computer-implemented method for automatic correction of a topology of a smart network that uses the information contained in the voltage measurements provided by smart meters in order to determine which meter is connected to which transformer. The method starts from an initial topology and divides up the meters into first and second batches for each transformer. Successive reallocations of meters in the second batches are made according to similarities with average voltages calculated and corrected from the first batches of meters. The method proceeds by iterations until there remain no more meters attributable to other transformers and updates the topology so that its evolution at a given time be readable.

A distributed device control system is provided. The system includes a plurality of windows, each window of the plurality of windows having at least one electrochromic window, a voltage or current driver for the at least one electrochromic window, and a first control system local to the window. The system includes a plurality of window controllers, each window controller configured to couple to one or more of the plurality of windows and having a second control system, for the one or more of the plurality of windows, local to the window controller. The system includes a command and communication device configured to couple to each of the plurality of window controllers, configured to couple to a network, and having a third control system, for the plurality of windows, wherein control of the plurality of windows is distributed across the plurality of windows, the plurality of window controllers, the command and communication device, and a portion of the network.