How does the inverter of a marine inverter diesel generator work to achieve the effect of saving fuel?

The inverter of a marine inverter diesel generator plays a vital role in saving fuel, and its working principle and technical details are worth our in-depth discussion. The inverter is mainly composed of input filter circuit, rectifier circuit, DC filter circuit, inverter circuit, output filter circuit and control circuit. Its working principle is simply to convert the input direct current (DC) into alternating current (AC) through the inverter circuit, and output stable AC voltage and current after being processed by the filter circuit.
The input filter circuit is used to filter out clutter and interference in the input DC to ensure the stability of the input voltage. In some cases, if the input power is AC, the rectifier circuit will convert it into DC. But in a marine inverter diesel generator, this step is usually completed by the rectifier of the generator. Further filter out the pulsating components in the rectified DC to ensure the stability of the DC voltage. The inverter circuit is the core part of the inverter, which converts DC into high-frequency AC through modulation technologies such as PWM. The output filter circuit converts high-frequency AC into industrial frequency AC that meets the requirements and filters out high-frequency harmonics and clutter. The control circuit is responsible for detecting parameters such as output voltage and current, and adjusting them according to the set values ​​to ensure the stability and accuracy of the output voltage and current.
The inverter monitors the output voltage and frequency in real time through a closed-loop control system and adjusts them according to actual needs. In the ship power grid, the inverter can ensure the normal operation of various load devices, especially when the grid voltage fluctuates or the load changes, the inverter can respond quickly to maintain the stability of the output voltage and frequency.
The inverter reduces energy waste by precisely controlling the output voltage and current. When the ship is moored or sailing at a low speed, the inverter can reduce the output power of the diesel generator to adapt to smaller load requirements, thereby saving fuel.
The inverter can adjust the output power of the diesel generator according to the load demand to avoid the waste of "big horse pulling a small cart". The inverter effectively suppresses the harmonic components in the output current through filtering circuits and advanced control algorithms, reducing harmonic losses and pollution to the power grid. The inverter has a soft start function, which can avoid current shock when starting the load and reduce the impact loss on the power grid and diesel generator. Some high-end inverters also have intelligent control functions, which can automatically adjust the output power and operating status of the diesel generator according to the ship's operating status and weather forecast information to achieve more efficient energy utilization.
Through the above mechanism, the inverter can significantly reduce the fuel consumption of the diesel generator, and the saving effect is usually between 20%-30%. This not only reduces the operating cost of the ship, but also reduces greenhouse gas emissions, which is of great significance to environmental protection. The inverter improves the stability and reliability of the ship's power system and reduces the downtime caused by power failures. The inverter also reduces the ship's dependence on the power grid and improves the ship's self-sufficiency.
The inverter of the marine inverter diesel generator achieves fuel saving by precisely controlling the output voltage and current, improving energy utilization efficiency, and adopting advanced control technology and algorithms. The application of this technology not only reduces the operating cost and environmental impact of the ship, but also improves the stability and reliability of the ship's power system.