Electric power supply method and electric power supply system

An electric power supply method for hydraulic fracturing, comprising:

• acquiring, by a power supply controller in an electric power supply system, an electrical energy parameter of electrical energy from a power supply system, wherein the electric power supply system further comprises a transformer, a rectifier filter, and a control transformer each coupled to the power supply controller, and wherein the transformer is coupled to the rectifier filter;
• determining, by the power supply controller based on the electrical energy parameter, whether a power supply condition for supplying power to a target power-consuming system is met;
• determining, by the power supply controller, a target AC distribution port corresponding to the transformer, a target DC distribution port corresponding to the rectifier filter, and a target AC distribution port corresponding to the control transformer when the power supply condition is met;
• controlling, by the power supply controller sending a first power supply signal to the transformer, the transformer to deliver AC power to an AC power-consuming system in the target power-consuming system through the target AC distribution port corresponding to the transformer;
• controlling, by the power supply controller sending the first power supply signal to the rectifier filter, the rectifier filter to convert the AC power delivered by the transformer into DC power according to the first power supply signal, and then deliver the DC power to a DC power-consuming system in the target power-consuming system through the target DC distribution port corresponding to the rectifier filter;
• and
• controlling, by the power supply controller sending the first power supply signal to the control transformer, the control transformer to deliver AC power to an instrumentation system in the target power-consuming system through the target AC distribution port corresponding to the control transformer such that the AC power-consuming system, the DC power-consuming system, and the instrumentation system in the target power-consuming system are powered simultaneously.