PROJECT TITLE :
Capacity optimisation method of distribution static synchronous compensator considering the risk of voltage sag in high-voltage distribution networks
ABSTRACT:
Unlike the traditional ways that only take static voltage stability or minimum network loss into consideration when optimising capacity of distribution static synchronous compensator (D-STATCOM), a brand new approach is proposed with considering the chance of voltage sag furthermore as the network loss and the investment value of D-STATCOM. This approach can balance the investment value and technical performance. Monte Carlo methodology is employed for the random setting of fault varieties and locations to get the initial probability of voltage sag under some given configuration schemes. Moreover, through revealing the hidden relationship between the first likelihood and the real-time load, the converted chance is presented to fit the expression for calculating the original likelihood of voltage sag with respect to the scale of extra D-STATCOM. Finally, one-objective capability optimisation model is established to obtain the optimum size of additional D-STATCOM, that is predicated on the economic assessment technique of risk. The proposed method is validated in Chinese Dongguang Distribution Networks. The result confirms this technique can not only cut back the loss of voltage sag, but also significantly improve the potency of D-STATCOM.
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