This paper proposes a new approach to the distributed generation system protection coordination based on directional overcurrent protections with inverse-time characteristics. The key question of protection coordination is the determination of correct values of all inverse-time characteristics coefficients. The coefficients must be correctly chosen considering the sufficiently short tripping ti...

Background: Polycystic ovary syndrome (PCOS) is a common endocrine disorder in young women which has different clinical consequences. This study was conducted to evaluate the outcome of long or extended letrozole therapy for induction of ovulation in patients with polycystic ovary syndrome (PCOS). Materials and Methods: This prospective controlled study was conducted in a university hospital on...

Abstract When fault occurs in high wind power proportion grid, the control strategy and external characteristics of plant are affected by voltage drop so traditional short-circuit current engineering calculation is difficult to converge. A method for considering grid node importance evaluation crowbar protection DFIG(double-fed induction generator), proposed. This paper proposes equivalent mode...

As one of the key technologies for accelerating construction ubiquitous Internet Things, demand response (DR) not only guides users to participate in power market operations but also increases randomness grid and difficulty load forecasting. In order solve problem rough feature engineering processing low prediction accuracy, a short-term forecasting model LSTM neural network considering is prop...