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Decarbonisation of the European electricity system can become dauntingly costly due to transmission and distribution network issues arising from the integration of intermittent renewable generation sources. It is expected that wind energy will be the principal renewable source by 2050 and, as such, a number of initiatives in the academia and in the industry are being carried out to propose solutions...
The large-scale penetration of renewable generation into power systems has required an integration of wind and conventional thermal generation. This has been supported by high-voltage direct-current lines for bulk power transmission as wind generation is normally located far away from the load centres. The participation of wind generators in primary frequency regulation and stability has become an...
The declining inertia on the GB grid as a result of the change in the generation mix poses a challenge in the operation and control of the future power system. This work analyses the inertia contribution of wind turbine generators to the GB power system and tests the effectiveness of supplementary controllers designed to provide inertia support as an ancillary service. A simplified three-machine representation...
High voltage dc networks are a promising technology to flexibly transmit power over long distances. However, dc grid protection is still a major challenge. DC fault clearance can be mainly achieved with three devices. These are ac circuit breakers (ACCBs), dc circuit breakers (DCCBs) and converters with fault current blocking (FB) capability. In spite of their great operational advantages, FB converters...
In recent years, the demand for HVDC grids has greatly increased due to the integration of renewable energy, especially offshore wind energy. The current flow within the DC grid is passively determined by the resistance of the DC lines. In a complex DC grid, the current flow in each cable cannot be precisely controlled by adjusting the voltage set points of each converter and an overload may occur...
In Great Britain, increased wind generation, up to 34 GW, is planned. Offshore and onshore infrastructure reinforcements have been proposed, the inland reinforcement including series compensation (fixed capacitors), as discussed in the UK National Grid 2020 Vision. Interaction of series fixed capacitors with the quadrature boosters that are already installed in the GB transmission grid is assessed,...
This paper presents the first individual channel analysis and design (ICAD) of a high-order synchronous generator and a static VAr compensator (SVC) featuring a damping control loop. Particular emphasis is given to the closed-loop performance and robustness assessments. Fundamental analyses are carried out using ICAD and its frequency-domain approach to explain the dynamic behavior of the generator...
This paper presents a comparison between series and shunt flexible AC transmission systems (FACTS) controllers. The comparison is made using frequency domain methods under the framework of individual channel analysis and design (ICAD). A 5th order model synchronous generator feeding into a large system via a tie-line system is considered. The system includes a shunt compensator in the form of a static...
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