#Asynchronous generator matlab simulink series

According to turbine characteristics, for a 10 m/s wind speed, the turbine output power is 0.75 pu (206 kW). Initial conditions (xInitial vector) have been automatically loaded in your workspace so that simulation starts in steady state.ДЄs the asynchronous machine operates in generator mode, its speed is slightly above the synchronous speed (1.011 pu). Start simulation and observe voltages, currents, powers, asynchronous machine speed and system frequency on the two scopes. The example illustrates the dynamic performance of the frequency regulation system when an additional 25 kW customer load is switched on. The diesel generator (not simulated) is stopped and the synchronous machine operates as a synchronous condenser with its mechanical power input (Pm) set at zero. SimulationДЇor the example, the wind speed (10m/s) is such that the wind turbine produces enough power to supply the load. In order to minimize voltage disturbances, switching is performed at zero crossing of voltage. This signal is converted to an 8-bit digital signal controlling switching of the eight three-phase secondary loads. The phase error is then used by a Proportional-Differential (PD) controller to produce an output signal representing the required secondary load power. This error is integrated to obtain the phase error. The measured frequency is compared to the reference frequency (60 Hz) to obtain the frequency error. This controller uses a standard three-phase Phase Locked Loop (PLL) system to measure the system frequency. The frequency is controlled by the Discrete Frequency Regulator block. The nominal power of each set follows a binary progression so that the load can be varied from 0 to 446.25 kW by steps of 1.75kW.

#Asynchronous generator matlab simulink series

The Secondary Load block consists of eight sets of three-phase resistors connected in series with GTO thyristor switches. To display the turbine characteristics, double click on the block located below the Wind Turbine block. When you opened this example, the Pm (w_Wind, w_Turb) characteristics was automatically loaded in your workspace (psbwindgen_char array). The Wind Turbine block uses a 2-D Lookup Table to compute the turbine torque output (Tm) as a function of wind speed (w_Wind) and turbine speed (w_Turb). A secondary load bank is used to regulate the system frequency by absorbing the wind power exceeding consumer demand. In this all-wind mode, the synchronous machine is used as a synchronous condenser and its excitation system controls the grid voltage at its nominal value.

When the wind power exceeds the load demand, it is possible to shut down the diesel generator. The HPNSWD system presented in this example uses a 480 V, 300 kVA synchronous machine, a wind turbine driving a 480 V, 275 kVA induction generator, a 50 kW customer load and a variable secondary load (0 to 446.25 kW).ДЄt low wind speeds both the induction generator and the diesel-driven synchronous generator are required to feed the load. The first commercial application of HPNSWD technology was commissioned in 1999 by Northern Power Systems (Vermont, USA) on St. The optimal wind penetration (installed wind capacity/peak electrical demand) for this system depends on the site delivery cost of fuel and available wind resource. This technology was developed by Hydro-Quebec to reduce the cost of supplying electricity in remote northern communities. A generic model of the High-Penetration, No Storage, Wind-Diesel (HPNSWD) system is presented in this example.