The time has come for all types of power generation groups and private capital to fully enter the electricity sales market. The competition for power sales is mainly reflected in the power supply service. So what is t...The time has come for all types of power generation groups and private capital to fully enter the electricity sales market. The competition for power sales is mainly reflected in the power supply service. So what is the current status of power supply enterprise services? To this point, this paper conducts a questionnaire survey on the satisfaction status of power supply services of some power users, and conducts statistics and analysis on its data, and establishes a customer satisfaction model for power supply enterprise services, and then uses weighted arithmetic average method to measure 152 online customers. The results of the satisfaction questionnaire are analyzed, and it is expected to provide reference for the power marketing system.展开更多
Loads in large scale industrial enterprises are always various and complex, causing insecure power quality. Meanwhile, some sensitive loads or precise instruments demand for high power quality. When voltage flicker or...Loads in large scale industrial enterprises are always various and complex, causing insecure power quality. Meanwhile, some sensitive loads or precise instruments demand for high power quality. When voltage flicker or harmonics occurs, dynamic voltage restorer (DVR) can be used to stabilize the load-side voltage, which is a good manner of improving power quality. The paper explains the load demand in large scale industrial enterprises, analyzes several common voltage compensation scheme of DVR, and comes up with another voltage compensation scheme of DVR applied for double power supply with double load. A Simulink model according to the new scheme is also built in MATLAB/Simulink to test its performance. Simulation results show that the proposed scheme can guarantee the load-side voltage stability, which is an effective scheme for managing power quality.展开更多
文摘The time has come for all types of power generation groups and private capital to fully enter the electricity sales market. The competition for power sales is mainly reflected in the power supply service. So what is the current status of power supply enterprise services? To this point, this paper conducts a questionnaire survey on the satisfaction status of power supply services of some power users, and conducts statistics and analysis on its data, and establishes a customer satisfaction model for power supply enterprise services, and then uses weighted arithmetic average method to measure 152 online customers. The results of the satisfaction questionnaire are analyzed, and it is expected to provide reference for the power marketing system.
文摘Loads in large scale industrial enterprises are always various and complex, causing insecure power quality. Meanwhile, some sensitive loads or precise instruments demand for high power quality. When voltage flicker or harmonics occurs, dynamic voltage restorer (DVR) can be used to stabilize the load-side voltage, which is a good manner of improving power quality. The paper explains the load demand in large scale industrial enterprises, analyzes several common voltage compensation scheme of DVR, and comes up with another voltage compensation scheme of DVR applied for double power supply with double load. A Simulink model according to the new scheme is also built in MATLAB/Simulink to test its performance. Simulation results show that the proposed scheme can guarantee the load-side voltage stability, which is an effective scheme for managing power quality.
