Summary
The impedance characteristics of the renewable power station vary significantly under different operating conditions such as no-load and on-load operation of collector lines, which easily induces high-frequency resonance with the Static Synchronous Compensator (STATCOM) equipped in the station, resulting in equipment tripping and even damage. The reason is that the interaction between the negative damping characteristics of STATCOM and the collector line capacitance leads to the instability of the system at high frequencies. This paper proposes a
Read more Read lessSTATCOM impedance reshaping strategy to solve this problem. Firstly, the PV (Photovoltaic) power station with four collector line and STATCOM are modelled, and the mechanism of high-frequency resonance is described, it is pointed out that the traditional scheme for impedance reshaping at a single frequency point cannot be adapted to the system with multiple collector line. Secondly, the strategy of adding filtering in the current sampling link is proposed to make the negative damping zone shift to the low frequency band, which is suitable for PV power stations with more collector line. Finally, a HIL (Hardware-In-Loop) experimental platform was built with a physical STATCOM controller connected, while other parts were simulated by software. Based on this setup, the effectiveness of the proposed impedance reshaping strategy is verified under various switching conditions of collector lines.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B4_11601_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | China, People's Republic of |
| Study committees | |
| File size | 4 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
YU Hongyang - SIEYUAN ELECTRIC CO., LTD; WANG Chao - SIEYUAN ELECTRIC CO., LTD; WU Xiaodan - SIEYUAN ELECTRIC CO., LTD; WEI Xing - SIEYUAN ELECTRIC CO., LTD; WANG Pengfei - SIEYUAN ELECTRIC CO., LTD
Keywords
High-frequency resonance, STATCOM, impedance reshaping, negative damping
