Abstract: 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.

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: The invention relates to a method and apparatus for monitoring the condition of subsystems within a renewable generation plant or microgrid which are using Supervisory Control and Data Acquisition (SCADA) systems for allowing plant operators to monitor and interact with a plant via human machine interfaces.

Abstract: A method for monitoring turbines of a windmill farm includes: providing a global nominal dataset containing frame data of the turbines of the windmill farm and continuous reference monitoring data of the turbines for a first period in a fault free state, the reference monitoring data including at least two same monitoring variables for each turbine; building a nominal global model based on the global nominal dataset which describes the relationship in between the windmill turbines and clustering the turbines according thereto; assigning the data of the global nominal dataset to respective nominal local datasets according to the clustering; and building a nominal local model for the turbines of each cluster based on the respective assigned nominal local datasets, the nominal local model being built such that a nonconformity index is providable which indicates a degree of nonconformity between data projected on the local model and the model itself.

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: 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 cooling system for a high voltage electromagnetic induction device, includes: at least one duct filled with a first coolant and surrounded by a second coolant, each being routed along a direction of natural convection; at least one group of fans, each fan of the group being mounted along a respective duct of the at least one duct along the direction of natural convection and being configured to blow for the-second-coolant-forced cooling; at least one group of electric motors, each electric motor being configured to operate a respective fan of the at least one group of fans; at least one group of switches, each switch being configured to control a respective electric motor of the at least one group of electric motors. A method of cooling a high voltage electromagnetic induction device is also provided. By using the option of operating fans with higher cooling rate, because of the less fans are operating, the predetermined cooling capacity can be reached with lower power consumption.

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 monitoring a circuit breaker, a system and an internet of things using the same are disclosed. The method 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: The present application discloses a method to optimize operation of a transformer cooling system, the corresponding cooling system, and a method to determine the capacity of Variable Frequency Drives (VFD) that are used in the transformer cooling system. The method comprises: preprocessing the initial data input by user; collecting the on-line data, and calculating the optimized control command to meet the requirement of the transformer loss, top-oil temperature variation and noise; and executing the control actions by controlling a controllable switch and/or sending a control command to a VFD. Compared with the existing prior arts, the proposed solutions are much more intuitive and practical in the field of the cooling system.

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: A method for controlling cooling system of a power equipment and a system using the same. The method includes steps of: obtaining a first data set representing operational cost related parameters specific to the power equipment and its cooling system at a series of time intervals of a first load cycle in a history profile; obtaining a second data set representing operational cost related parameters specific to the power equipment and its cooling system at a series of time intervals of a second load cycle in the history profile, establishing a third data set, establishing a fourth data set; establishing a fifth data set; establishing a sixth data set; and controlling the cooling system to operate at a series of time intervals of the present load cycle at the stablished cooling capacity parameters concerning the present load cycle represented by the sixth data set.

Abstract: A method for defect pre-warning of a power device may comprise processing measurement data regarding components of the power device based on predetermined severity criteria, to obtain severities of monitoring indexes related to defects of the components. Weights of the monitoring indexes with respect to the defects are determined based on effectiveness of the monitoring indexes for the defects. A defect probability that at least one of the components has each of at least one of the defects is estimated based on the severities and the weights. Some embodiments may achieve more reliable defect probability estimation and in some embodiments defective component probability and/or device healthy may be estimated. Based on the reliable information, it may facilitate to arrange the maintenance before defects involve into a fault and assess a risk of power device operation and control, thereby improving reliability of the power device.

Abstract: The invention relates to a method and apparatus for monitoring the condition of subsystems within a renewable generation plant or microgrid which are using Supervisory Control and Data Acquisition (SCADA) systems for allowing plant operators to monitor and interact with a plant via human machine interfaces.

Abstract: A cooling system for a high voltage electromagnetic induction device, includes: at least one duct filled with a first coolant and surrounded by a second coolant, each being routed along a direction of natural convection; at least one group of fans, each fan of the group being mounted along a respective duct of the at least one duct along the direction of natural convection and being configured to blow for the-second-coolant-forced cooling; at least one group of electric motors, each electric motor being configured to operate a respective fan of the at least one group of fans; at least one group of switches, each switch being configured to control a respective electric motor of the at least one group of electric motors. A method of cooling a high voltage electromagnetic induction device is also provided. By using the option of operating fans with higher cooling rate, because of the less fans are operating, the predetermined cooling capacity can be reached with lower power consumption.

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: The present application includes wind turbine condition monitoring method and system.