简答题The components of shunt capacitor device in power grid usually include () A、Series reactor B、Discharge device C、 Zinc oxide arrester and overvoltage protection device D、 fuse简答题Which of the following devices cannot be used to compensate for reactive power A、electric generator B、capacitor C、arrester D、arrester简答题The main function of shunt capacitors is A、Compensation system reactive power, improve voltage quality B、Reduce active power C、Improve the lightning resistance level of the line D、Compensating capacitive current at neutral points简答题The rated capacity of shunt reactors is generally expressed by () A、active power B、reactive power C、apparent power D、instantaneous power简答题The role of capacitor bank series reactor is () A、Generate reactive current with phase ahead of grid voltage to improve grid power factor B、 High harmonic suppression C、Limiting closing inrush current D、Discharge capacitor's energy storage to provide relay protection signal简答题Shunt capacitor device in power grid () A、The main function is to improve the power factor of the power system B、 Can be used to reduce power network loss C、 Can be used to improve the power quality of the system D、Can be used to reduce harmonic hazards简答题The shunt capacitor with triangular connection can filter the triple harmonic current, which is beneficial to eliminate the influence of the triple harmonic current in the power grid A、正确 B、错误简答题Shunt capacitor device in power grid A、The main function is to improve the power factor of the power system B、Can be used to reduce power grid loss C、Can be used to improve the power quality of the system D、Can be used to increase active power简答题The role of the components of shunt capacitor device in the power grid is () A、Series reactor can restrain inrush current of closing and harmonic of power grid B、 Discharge device can discharge capacitor energy storage, provide relay protection signal C、Zinc oxide arrester and overvoltage protection device can suppress operating overvoltage D、 A single capacitor protection fuse provides quick protection against short circuit between electrodes of capacitors without internal fuse.简答题The rated capacity of power capacitors is generally expressed by () A、active power B、reactive power C、apparent power D、instantaneous power