Study on Transient Power Angle Stability Control with Electrochemical Energy Storage
In view of the increasing shortage of traditional emergency control resources in the power grid,the rapidity and bidirectional power control ability,which is controlled by the the electrochemical energy storage(EES),is used to study its application for transient power angle stability control. Firstly,the dual machine equivalent model with EES is deduced. Based on EEAC theory,the principle of EES to improve the transient stability margin is analyzed. Secondly,the method for calculating effective operation duration of energy storage station with consideration of time sequence difference of equipment and system protection is proposed,which improves the working efficiency of emergency control energy storage. The formulation method of coordinated and control strategy of multiple measures considering energy storage and based on performance cost is proposed,the safety and economy of the emergency of emergency control are considered so to provide on line auxiliary decision support for the transient emergency control of the power grid. Furthermore,the panorama monitoring system structure of the energy storage station is proposed,which provides technical practice idea for the interaction of energy storage station and the emergency control system of power grid. Finally,both effectiveness and rationality of the proposed method are verified in the actual calculation example in China Northwest Power Grid. The study conclusion can provide theoretical reference for the expansion and construction of the second line of defence of the power grid for the large scale energy storage and high ratio new energy power grid.
electrochemical energy storagetransient power angle stabilityeffective working timesystem architecturecoordinated control method
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维普
