A5016438178- Power System Optimization and Stability
- HVDC Systems and Fault Protection
- Microgrid Control and Optimization
- Frequency Control in Power Systems
- Wind Turbine Control Systems
- Energy Load and Power Forecasting
- Power Systems and Renewable Energy
- Islanding Detection in Power Systems
- Model Reduction and Neural Networks
- Numerical methods for differential equations
Tsinghua University
2021-2023
In multi-infeed hybrid AC-DC (MIDC) systems, the asynchronous interconnection between regional grids, complicated system dynamics and possible emergency faults have enormous effects on frequency stability. To address instability problems in situations, this paper proposes a decentralized control (EFC) strategy based coordinated droop for MIDC system. First, P-f LCC-HVDC systems is introduced, mechanism among generators designed. Then, to appropriately allocate power imbalance generators, an...
With the continuous development of large-scale complex hybrid AC-DC grids, fast adjustability HVDC systems is required by grid to provide frequency regulation services. This paper develops a fully data-driven linear quadratic regulator (LQR) for temporal support. The main technical challenge complexity and nonlinearity multi-infeed (MIDC) dynamics that make LQR intractable. Based on Koopman operator (KO) theory, eigenpairs construction method developed fit global dynamic model MIDC systems....
The dynamic security assessment of power systems needs to scan contingencies in a preselected set through time-domain simulations. With more and wind generation integrated into systems, the complexity simulation will increase greatly if farms are modeled detail. Thus, it is critical develop equivalent methods for farms. response characteristics permanent magnet synchronous generator-wind turbine generators (PMSG-WTGs) not only influenced by their control strategies, but also operating speeds...
In multi-infeed hybrid AC-DC (MIDC) systems, the emergency frequency control (EFC) with LCC-HVDC systems participating is of vital importance for system security. Nevertheless, when regional power are operated by different decision-makers, and their connected AC might be unwilling to participate in EFC due costs losses. this paper, incentivize adjacent droop-based EFC, a novel control-parameter-based incentive mechanism proposed, which can flexibly deal various possible imbalances. Then,...
Abstract The sub-synchronous oscillation (SSO) which occurred in direct-driven wind generators (DDWG) based farms became a research hotspot. SSO excited the shaft torsional vibration of thermal and caused trip failures, leading to economic losses stabilization problems. However, existing phasor-based source locating methods cannot be applied since power system quasi-steady-state assumption was not satisfied scenarios. Thus, novel method for sources urgently required. To fill this gap, paper...