OPTIMIZED PARAMETER OF VIRTUAL SYNCHRONOUS MACHINE (VSM) CONVERTER CONTROLLER ON TRANSIENT AND FREQUENCY STABILITY
<p align="justify">Wind energy is a source of renewable energy that plays a key role towards a sustainable future. Main disadvantages of Non-Synchronous Generation (NSG) are providing less inertia (rotor) and damping (mechanical friction and damper windings) for the system grid compa...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/28660 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | <p align="justify">Wind energy is a source of renewable energy that plays a key role towards a sustainable future. Main disadvantages of Non-Synchronous Generation (NSG) are providing less inertia (rotor) and damping (mechanical friction and damper windings) for the system grid compare to the conventional synchronous machine, which makes power system vulnerable to power dynamics and system faults. Power system stability will be further degraded as the penetration of renewable energy sources increases. One solution for this challenge was to make the NonSynchronous Generation have similar ability with conventional synchronous machine, for this part is providing inertia and damping. Wind turbine with full powered converter (type 4) will be the subject of this research with main purpose to control grid-side converter of wind turbine so it can behave like synchronous machine and then so called Virtual Synchronous Machine (VSM). Strategy to control grid-side converter will be presented in this research by simulating a controller into converter-interface. Simulation and the design of controller will be conducted in DigSILENT PowerFactory software and tested into several cases and procedure to obtain the VSM response regarding transient stability and frequency stability. VSM controller consists of 6 major parts, active power droop governor, reactive power droop voltage controller, inertia emulation, dynamic braking, current limiter and waveform generator. To get the similar response with conventional synchronous machine, the parameter of VSM should be estimated with the optimization method. In this research, parameter optimization implemented using least square error method which compare the measurement data from conventional synchronous machine and adjusted to VSM parameters. Simulation conducted into 2 main parts, 2-machines testing system and 4-machines testing system. Short circuit event with 150 miliseconds conducted in testing system to have VSM response and effect regarding transient stability. Load change event conducted in testing system to have VSM response and effect regarding frequency stability. The result shows that implementing VSM into full powered converter wind turbine (type 4) enhanced the transient and frequency stability compare to conventional wind turbine controller. <p align="justify"> <br />
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