ASSESSMENT OF THE WIND FARM IMPACT ON POWER SYSTEM STABILITY WHILE REDUCING OF TOTAL INERTIA
DOI:
https://doi.org/10.31489/2021No4/45-51Keywords:
wind turbine, inertia, out-of-step modeAbstract
With the development of wind power in the world, the issues of joint operation of wind power plants in power systems become relevant. Modern variable speed wind turbines with are connected to the network through power voltage converters, which, with their significant integration into the power systems, negatively affects the transient stability of such systems, the operation of emergency control devices, etc. The problem is caused by the effect of "decoupling" of the wind turbine generators from the power systems, since the connection of the mechanical moment of the wind turbine with the power system is lost, its frequency characteristics also change, the overall inertia of the system decreases, and as a consequence, these phenomena can lead to rapid fluctuations in frequency and voltage in normal modes, and also an avalanche of frequency and voltage in case of accidents. In addition, a decrease in the total inertia can contribute to the failure of out-of-step protection systems for eliminating the out-of-step mode, due to an increase in the slip frequency. In the article, experimental studies of the implementation of wind power plants in power system to assess the impact of their work on the rate of the transients.
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