Abstract : With the maturity of high-voltage frequency converter technology, it has become possible to improve the operating performance and system efficiency of water injection pumps by using frequency conversion speed regulation. It facilitates the automation of the production process and provides significant potential for energy saving in water injection pumps. This article briefly describes the problems existing before adopting high-voltage frequency converters, and discusses its application prospects in water injection systems from three aspects: the purpose, characteristics, and benefits of high-voltage frequency conversion for water injection pumps. Keywords : High-voltage frequency converter; Water injection pump; Development prospects A water injection station has 33 motors with a power of 1.6MW and a voltage of 6kV or above, with more than 14 operating daily, consuming over 2 x 10⁸ W·h of electricity annually. Water injection equipment adjusts the output by regulating the opening of the outlet valve, resulting in high input power and significant energy consumption during valve throttling. Since most pumps are square torque loads, the shaft power has a cubic relationship with the speed. When the pump speed decreases, the power consumption also decreases significantly, thus presenting a large energy-saving potential. Using a frequency converter to adjust the speed of the water injection motor and change the output can achieve an energy saving rate of 20%–50%. Due to variations in production parameters and fluctuations in the levels of the combined station's wastewater tanks and water injection tanks, as well as the pressure and injection volume requirements of the injection wells, it is necessary to adjust the motor speed to change the pressure and flow rate. Previously, due to the difficulty in adjusting the speed of high-voltage motors and the complex structure, large size, and maintenance difficulties of high-voltage frequency converters, implementation was not possible. With the maturity of high-voltage variable frequency speed control technology, it has become possible to use high-voltage variable frequency technology for water injection pumps. I. Problems Before Adopting High-Voltage Frequency Converters The Gudong Oilfield has six water injection stations. The average pump pressure is 14.5 MPa, the dry pressure is 14.1 MPa, the unit consumption is 5.43 kW·h/m, the designed daily water injection capacity is 28,800 m³, and the actual daily water supply is 27,040 m³. The flow rate is adjusted by the number of injection pumps and valves. Due to early commissioning, the pump equipment is severely aged and experiences significant wear and tear. [b][align=center]For details, please click: Application Prospects of High-Voltage Frequency Converters in Water Injection Systems[/align][/b]