Enhanced control and parameter analysis for virtual synchronous generators without PLL
| Autor: | Zijun Song, Xueyuan Zhang, Xiangwu Yan, Bo Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
power generation control
PLL VSG system impacts Computer science 020209 energy virtual synchronous generators Energy Engineering and Power Technology feedback 02 engineering and technology invertors VSG dynamics electrical system stability controlling droop controller Electric power system Control theory power system stability enhanced virtual inertia controller enhanced VSG control system 0202 electrical engineering electronic engineering information engineering Voltage droop enhanced controller small-signal stability analysis 020208 electrical & electronic engineering General Engineering enhanced control design virtual synchronous generator technology phase locked loops Line (electrical engineering) machine control virtual impedance Phase-locked loop lcsh:TA1-2040 Control system Inverter synchronous generators control system synthesis lcsh:Engineering (General). Civil engineering (General) Software electric current control current controller Voltage |
| Zdroj: | The Journal of Engineering (2019) |
| DOI: | 10.1049/joe.2018.8453 |
| Popis: | Currently, virtual synchronous generator (VSG) technology is proposed to be a solution to stability controlling of micro-source inverter. However, the deviation from phase locked loop (PLL) influences the reference frequency calculating which is important to the VSG control system. This paper focuses on the virtual inertia controller in the VSG control system, an enhanced controller is achieved for avoiding the effect of PLL on the VSG dynamics. For analysing dynamic characteristics of the enhanced VSG control system, the linearised small-signal model of VSG in isolated operation is well established, including electrical system, enhanced virtual inertia controller, voltage and current controller, virtual impedance, and droop controller. By small-signal stability analysis, the influence rules of the main parameters (load, line, virtual inertia and proportional-Integral gain) on VSG system impacts are provided, which helps identifying possible feedback signals for controller design to improve the system stability. Results obtained from time-domain small-signal model are compared with those from the electrical simulation to verify its accuracy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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