电网频率关系着整个电力系统的安全运行，频率或高或低都会对系统中的各个组

The frequency of the power grid is related to the safe operation of the entire power system. A high or low frequency will affect the various components of the system. The main hazards brought by frequency fluctuations to the system are as follows: ① When the frequency is low, it will affect the change of the motor speed in the system and affect the quality of industrial production. ②Frequency fluctuations will affect power electronic devices and reduce the accuracy of various control equipment. ③When the system is operating at low frequency, it will cause the loss of the transformer core and the increase of the excitation current, which will increase its temperature, reduce the working efficiency of the transformer, and present certain safety risks. ④ When the frequency is reduced, the operating pressure of the steam turbine blades will increase, which will also affect the boiler. ⑤When the generator is operating at low frequency, the generator needs to increase the excitation current to maintain a constant terminal voltage, which will increase the stability of the generator, so the generator must reduce the power generated to maintain safe and stable operation.

Grid frequency is related to the safe operation of the entire power system, and frequency, high or low, can affect the various components of the system. The harm caused by frequency fluctuation to the system is mainly as follows: (1) when the frequency is low, it will affect the change of motor speed in the system and affect the quality of industrial production. (2) Frequency fluctuations will affect power electronics, so that the accuracy of various control equipment is reduced. (3) When the system is operating at low frequency, it will cause the loss of the transformer core and the excitation current to increase, make it increase the temperature, reduce the efficiency of the transformer, and there is a certain security risk. (4) When the frequency is reduced, the operating pressure of the turbine blades increases, and it also affects the boiler. (5) When the generator is operating at low frequencies, the generator needs to increase the excitation current to maintain a constant voltage at the end of the machine, which will increase the stability of the generator, so the generator should reduce the power generated to maintain safe and stable operation.

Power grid frequency is related to the safe operation of the whole power system. High or low frequency will affect each component of the system. The harm of frequency fluctuation to the system mainly includes the following points: ① when the frequency is low, it will affect the change of motor speed in the system and the quality of industrial production. ② The fluctuation of frequency will affect the power electronic devices and reduce the accuracy of various control devices. ③ When the system is in low frequency operation, the core loss and excitation current of the transformer will increase, which will increase its temperature, reduce the working efficiency of the transformer, and there are certain security risks. ④ When the frequency decreases, the operating pressure of the turbine blade increases, and it also affects the boiler. ⑤ When the generator is in low frequency operation, the generator needs to increase the excitation current to maintain the constant terminal voltage, which will increase the stability of the generator, so the generator should reduce the power to maintain safe and stable operation.<br>