Protection scheme design for meshed VSC-HVDC transmission systems of large-scale wind farms

2010 ◽  
Author(s):  
J. Yang ◽  
J.E. Fletcher ◽  
J. O'Reilly ◽  
G.P. Adam ◽  
S. Fan
Keyword(s):  
Large Scale ◽  
Wind Farms ◽  
Transmission Systems ◽  
Scheme Design ◽  
Hvdc Transmission ◽  
Protection Scheme

scholarly journals Design and Transient Studies on Multi-Terminal VSC-HVDC Systems Interconnecting Offshore Wind Farms

2019 ◽  
Vol 17 (2) ◽  
pp. 181-192
Author(s):  
M. Mohan ◽  
K. Panduranga Vittal
Keyword(s):  
Large Scale ◽  
Wind Farms ◽  
Transmission System ◽  
Offshore Wind ◽  
Voltage Source ◽  
Transmission Systems ◽  
Offshore Wind Farms ◽  
Continuous Increase ◽  
Modeling And Control ◽  
Hvdc Transmission

In recent years, offshore wind energy has increased significantly. The continuous increase in the offshore wind power generation level brings the requirement of the offshore wind farms (OWFs) integration with an AC grid. The multi-terminal (MT) voltage source converters (VSC)-based high voltage direct current (HVDC) transmission system is an emerging technology and also the best option to interconnect the large-scale OWFs to the AC grid. This paper presents the design, modeling, and control of MT VSC-HVDC transmission system linked offshore wind farms. Different cases of MT VSC-HVDC transmission systems are developed, and its simulation studies are carried out using PSCAD/EMTDC. The test results show the transient performance of the MT VSC-HVDC transmission systems under various AC and DC fault conditions. The studies also include the influence of wind variabilities as in the form of gust and ramp pattern during steady state and fault conditions.

scholarly journals A Protection Scheme for Multi-Terminal VSC-HVDC Transmission Systems

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 3159-3166 ◽  
Author(s):  
Ali Raza ◽  
Amin Akhtar ◽  
Mohsin Jamil ◽  
Ghulam Abbas ◽  
Syed Omer Gilani ◽  
...  
Keyword(s):  
Transmission Systems ◽  
Hvdc Transmission ◽  
Protection Scheme

Non‐pilot protection scheme for multi‐terminal VSC–HVDC transmission systems

2019 ◽  
Vol 13 (16) ◽  
pp. 3033-3042 ◽  
Author(s):  
Mohammed Elgeziry ◽  
Mahmoud Elsadd ◽  
Nagy Elkalashy ◽  
Tamer Kawady ◽  
Abdel‐Maksoud Taalab ◽  
...  
Keyword(s):  
Transmission Systems ◽  
Hvdc Transmission ◽  
Protection Scheme ◽  
Pilot Protection

scholarly journals Coordinated Control for Large-Scale Wind Farms with LCC-HVDC Integration

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2207 ◽  
Author(s):  
Xiuqiang He ◽  
Hua Geng ◽  
Geng Yang ◽  
Xin Zou
Keyword(s):  
Large Scale ◽  
Reactive Power ◽  
Wind Farms ◽  
Coordinated Control ◽  
Active Power ◽  
Phase Plane Analysis ◽  
Control Loop ◽  
Control Loops ◽  
Hvdc Transmission ◽  
Control Scheme

Wind farms (WFs) controlled with conventional vector control (VC) algorithms cannot be directly integrated to the power grid through line commutated rectifier (LCR)-based high voltage direct current (HVDC) transmission due to the lack of voltage support at its sending-end bus. This paper proposes a novel coordinated control scheme for WFs with LCC-HVDC integration. The scheme comprises two key sub-control loops, referred to as the reactive power-based frequency (Q-f) control loop and the active power-based voltage (P-V) control loop, respectively. The Q-f control, applied to the voltage sources inverters in the WFs, maintains the system frequency and compensates the reactive power for the LCR of HVDC, whereas the P-V control, applied to the LCR, maintains the sending-end bus voltage and achieves the active power balance of the system. Phase-plane analysis and small-signal analysis are performed to evaluate the stability of the system and facilitate the controller parameter design. Simulations performed on PSCAD/EMTDC verify the proposed control scheme.

scholarly journals Improved Collecting Line Current Protection Scheme against Large-scale Wind Generators Tripping off

2018 ◽  
Author(s):  
Wei Jin ◽  
Yuping Lu ◽  
Tao Huang
Keyword(s):  
Power System ◽  
Large Scale ◽  
Wind Farm ◽  
Wind Farms ◽  
Risk Indicators ◽  
Melting Time ◽  
Security Risk ◽  
Line Current ◽  
Protection Scheme ◽  
Wind Generators

There have been several cases of large-scale wind generators (WGs) tripping off caused by untimely fault removing in recent years. Currently, the discoordination between the box-type transformer fuse protection (BTFP) and two-section collecting line current protection (CLCP) brings a security risk to wind farm. In order to ensure the selectivity, the first section (Sec-I) CLCP should be set a enough interval that is longer than the fuse melting time, and another interval is set for the Sec-II CLCP, which weakens the speed of the CLCP. When a fault occurs on the collecting line, there is no doubt that WGs cannot work too long in abnormal operation, which may cause WGs to be placed off the grid. For a power system with high penetration of wind power, large-scale WGs tripping off will cause a great power shortage, and affect the stability of the power system. The selectivity and sensitivity of the CLCP is analyzed in detail to make the CLCP speed better. Considering the fault ride-through ability of WGs, the fault clear time is an important factor to lead to large-scale WGs tripping off. Two main works are done in this paper. The first is to accelerate the speed of the Sec-I CLCP though reducing the protection zone. Another one is introduce the risk assessment module into the CLCP, which not only improve the speed of the CLCP but also ensure the safety of the wind farm during faults. According to the deference in trip-off causes of WGs, the matching functions are created to assess the trip-off risk of WGs on the spot. In the case of fault, the trip-off risk indicators of WGs are timely updated to data sharing center and open to the CLCPs. The set of risk indicators is divided into several subsets according to the risk range. The dynamic changes of the subsets during fault help to improved CLCP scheme. This scheme can accelerate protection speed based on the increasing risk of large-scale WGs tripping off in wind farms. Compared with traditional CLCP, this approach can make the CLCP combines selectivity and speed better based on the analysis of the ride- through ability of WGs.

Sign in / Sign up

Export Citation Format

Share Document