Abstract: A method and system for monitoring condition of a fleet of circuit breakers includes: measuring at least one type of operating condition related signal for the respective circuit breakers during their operation; obtaining a set of feature data representing the respective measurements of operating condition related signal; performing cluster analysis of the set of feature data based on a similarity threshold; and generating a signal indicating the condition of the fleet of circuit breakers based on the resulting cluster number. Rather than comparing the data representing the measurements of operating condition related signal to a reference model built on CB's normal data, the method includes applying cluster analysis of the set of feature data representing the respective measurements of operating condition related signal. The method does not need a reference “normal” database for comparison.

Abstract: A method for monitoring a circuit breaker includes measuring at least two operating condition related parameters of the circuit breaker during operation of the circuit breaker; obtaining first data representing a vector having at least two components respectively representing the at least two measurements of the at least two parameters; judging location of the vector represented by the obtained data with respect to a vector space having an envelope separating healthy and unhealthy status of the circuit breaker, where the envelope has at least one portion of curvature; and generating a signal indicating the health status of the circuit breaker in consideration of the location of the vector if it is outside of the envelope.

Abstract: A method and system for condition monitoring electrical equipment includes detecting partial discharge impulses generated in the electrical equipment for at least one power cycle; obtaining first data representing the detected partial discharge impulses for the at least one power cycle; obtaining second data by phase-resolving the first data; obtaining third data by regularizing the second data; analyzing the third data into a first component and at least one second component; obtaining phase information of the first component; shifting the first component and the at least one second component in consideration of the obtained phase information; and generating a signal indicating a health state of the electrical equipment by comparing the shifted first and second components of the third data with their counterparts associated with an unhealthy electrical equipment.

Abstract: Methods for monitoring a circuit breaker include detecting at least one operation of a circuit breaker to obtain at least one vibration signal of the circuit breaker. Each vibration signal is represented as one-dimensional data of a vibration amplitude over time during the operation of the circuit breaker. The vibration signal is transformed to two-dimensional frequency-time data. The transformed frequency-time data is compared with benchmark data characterizing the at least one operation of the circuit breaker. A health condition is determined of the circuit breaker at least in part based on the comparison. Both the frequency component and the time component in the detected test vibration signals are considered in condition determination of the circuit breaker. The condition can be determined with high accuracy.

Abstract: A method for wind converter management, first and second data associated with a group of first measurements and a second measurement of the wind converter may be collected respectively. An association between the group of first measurements and the second measurement of the wind converter may be obtained. A condition of the wind converter may be determined based on a comparison of the collected first and second data and the obtained association. Also, the apparatuses, systems, computer readable media and IoT systems for wind converter management.

Abstract: A method and system for condition monitoring electrical equipment includes detecting partial discharge impulses generated in the electrical equipment for at least one power cycle; obtaining first data representing the detected partial discharge impulses for the at least one power cycle; obtaining second data by phase-resolving the first data; obtaining third data by regularizing the second data; analyzing the third data into a first component and at least one second component; obtaining phase information of the first component; shifting the first component and the at least one second component in consideration of the obtained phase information; and generating a signal indicating a health state of the electrical equipment by comparing the shifted first and second components of the third data with their counterparts associated with an unhealthy electrical equipment.

Abstract: It provides a method for monitoring condition of a fleet of circuit breakers and a system and an internet of things using the same. The method includes: (a) measuring at least one type of operating condition related signal for the respective circuit breakers during their operation; (b) obtaining a set of feature data representing the respective measurements of operating condition related signal; (c) performing cluster analysis of the set of feature data based on a similarity threshold; and (d) generating a signal indicating the condition of the fleet of circuit breakers based on the cluster number resulted from the step (c). Rather than comparing the data representing the measurements of operating condition related signal to a reference model built on CB's normal data, the embodiment according to present invention applies cluster analysis of the set of feature data representing the respective measurements of operating condition related signal.

Abstract: A method for wind converter management, data of a first set of measurements may be collected from respective wind converters in a group of wind converters. Data distributions for the respective wind converters may be obtained based on the collected data. A condition of a first wind converter in the group of wind converters may be determined based on the obtained data distributions.

Abstract: A method for wind converter management, first and second data associated with a group of first measurements and a second measurement of the wind converter may be collected respectively. An association between the group of first measurements and the second measurement of the wind converter may be obtained. A condition of the wind converter may be determined based on a comparison of the collected first and second data and the obtained association. Also, the apparatuses, systems, computer readable media and IoT systems for wind converter management.

Abstract: It provides a method for monitoring a circuit breaker and an apparatus and an internet of things using the same. The method includes: obtaining a first data set representing force applied to a fixed point of an element of an actuating mechanism of the circuit breaker in present operation cycle, judging a health condition of the circuit breaker in consideration of normal operating condition related parameters of the element according to a history profile when the circuit breaker operated normally and current operating condition related parameters of the element in the present operation cycle extracted from the force represented by the first data set, and generating a signal indicating the health condition of the actuating mechanism of the circuit breaker the circuit breaker.

Abstract: LED lighting device and LED control system are provided. An LED lighting device includes an LED power supply unit, a controller unit, a microphone module, a wireless communication module, and an LED light source assembly. An LED control system includes at least one LED lighting device, at least one of a smart terminal and a cloud server, and at least one smart home appliance. When a user sends a voice command to the LED lighting device, the LED lighting device captures and processes signal data from the voice command to provide control data to the smart terminal or cloud server, which then recognizes and processes the control data to provide processed control data. The processed control data are then sent to a corresponding smart home appliance communicated with the smart terminal or the cloud server to control an operation of the smart home appliance.

Abstract: LED lighting device and LED control system are provided. An LED lighting device includes an LED power supply unit, a controller unit, a microphone module, a wireless communication module, and an LED light source assembly. An LED control system includes at least one LED lighting device, at least one of a smart terminal and a cloud server, and at least one smart home appliance. When a user sends a voice command to the LED lighting device, the LED lighting device captures and processes signal data from the voice command to provide control data to the smart terminal or cloud server, which then recognizes and processes the control data to provide processed control data. The processed control data are then sent to a corresponding smart home appliance communicated with the smart terminal or the cloud server to control an operation of the smart home appliance.

Abstract: The present invention provides an LED lighting device and an LED lighting network system. The LED lighting device includes an LED lighting unit, an LED driving circuit, a controller, and a Wi-Fi module configured to send and receive Wi-Fi signals. The LED driving circuit connects to the LED lighting unit. The controller connects to the Wi-Fi module and the driving circuit. The LED lighting network system includes two or more of the above LED lighting devices. Each LED lighting device works as a network node, which transmits received Wi-Fi data to other LED lighting devices within its coverage range. The LED lighting devices may form a mesh network. Each LED lighting device may act as a gateway, a network accessing point, or a repeater. The LED lighting network can receive and transmit Wi-Fi signals. In a mesh network, Wi-Fi signals can be transmitted from one layer of LED lighting devices to the next layer.

Abstract: A LED illumination device which includes LED light-emitting element, LED driver circuit and wireless routing module with routing function that receives and transmits wireless signals. The LED driver circuit is connected to the LED light-emitting element and wireless routing module respectively; an LED illumination network system which consists of at least two above mentioned LED illumination device units, each unit transmitting the wireless signals it receives to other units within the reach of its wireless signals. The LED illumination device referred in this invention makes a lamp work also as wireless network router, or wireless hub. Therefore, as long as one lamp receives a signal, the signal will be passed on one after another, extending constantly the covering range of the wireless network, thereby breaking through the limit of transmission distance and penetration capability of wireless signals.

Abstract: A LED lamp and LED illumination system, the LED lamp comprises LED light-emitting element, LED driver circuit and Wi-Fi routing module with routing function that receives and transmits Wi-Fi signals, in which the LED driver circuit is connected to the LED light-emitting element and Wi-Fi routing module respectively; the LED illumination system consists of at least two above mentioned LED lamp units, each unit transmitting the Wi-Fi signals it receives to other units within the reach of its Wi-Fi signals. The LED lamp referred in this invention makes a lamp work also as wireless router, or wireless hub. Therefore, as long as one lamp receives a signal, the signal will be passed on one after another, extending constantly the covering range of the wireless network, thereby breaking through the limit of transmission distance and penetration capability of Wi-Fi signals.