50/100/500KW Convenient Silent Diesel Generator Set 120V/400V

50/100/500KW Convenient Silent Diesel Generator Set 120V/400V

Coordinated control of battery energy storage and diesel generator in independent AC microgrid

In the independent AC microgrid system, the coordination control between the diesel generator and the battery energy storage is the key to ensure the stable operation of the system. Based on the fast response characteristic of battery energy storage, a coordinated control method of diesel generator and energy storage battery was proposed. When the diesel generator is used as the main power supply, the auxiliary power control signal is introduced into the traditional droop control of the energy storage system to prevent the system collapse caused by the diesel engine overcurrent for a long time and improve the system stability. Aiming at the short-time power outage problem when the main power supply in the microgrid changes from the energy storage system to the diesel generator or from the diesel generator to the energy storage system, a seamless switching control strategy of the two main power supplies of the diesel generator and the energy storage battery is proposed.

 Modeling and operation simulation of Marine Diesel generator Set

The operation process of Marine diesel generator set is an important part of power plant operation. The number of diesel generators operating in parallel determines the capacity of a Marine power station. The stability of parallel operation is closely related to the stability of Marine power station. It is of great significance to establish a mathematical model which can accurately reflect the operation of diesel generator set for operation control, simulation and performance analysis of power station. The study of parallel operation of diesel generator sets involves the establishment of diesel generator model, parallel operation control model and electric load model. Although there are some different modeling methods for diesel generator model, most of them are limited to single model simulation. Taking diesel generator model as the core, the mathematical model of parallel operation of multiple diesel generator sets is established. Taking the "Yu-kun" ship power station as the reference object, the diesel generator model, power load model and parallel operation control system model are established respectively

The basic structure:

The basic structure of diesel generator is composed of diesel engine and generator. The diesel engine drives the generator to generate electricity.

The basic structure of diesel engine: cylinder, piston, cylinder head, inlet valve, exhaust valve, piston pin, connecting rod, crankshaft, bearing and flywheel components. Diesel generator diesel engine is generally single cylinder or multi cylinder four stroke diesel engine, I just talk about the basic principle of the work of single cylinder four stroke diesel engine: diesel engine starting is through manpower or other power to rotate the diesel crankshaft so that the piston in the top closed cylinder for up and down reciproCAT-parts-partsing motion. The piston completes four strokes in motion: the intake stroke, the compression stroke, the combustion and work (expansion) stroke and the exhaust stroke. When the piston moves from up to down, the inlet valve opens, and the fresh air filtered by the air filter enters the cylinder to complete the intake stroke. The piston moves upward from the bottom, the inlet and exhaust doors are closed, the air is compressed, the temperature and pressure increase, complete the compression process. When THE piston is about to reach the top, THE fuel INJECTOR will spray the filtered fuel into the combustion chamber in a mist and mix with the air of high temperature and pressure to burn on its own immediately. The high pressure will push the piston down to work, push the crankshaft to rotate and complete the work stroke. After the work stroke is finished, the piston moves up from the bottom, and the exhaust valve opens the exhaust to complete the exhaust stroke. The crankshaft rotates half a turn for each stroke. After several working cycles, the diesel engine gradually accelerates to work under the inertia of the flywheel.