Coordinated Control Of Wind Energy System Storage

With the intensification of the global energy crisis and environmental problems, high cleanliness, renewable resources and strong wind are becoming hot research, wind power network has become an inevitable trend. But for its intermittent nature and volatility characteristics of wind power into the grid is bound to bring some volatility, energy storage technology is an effective means to resolve this issue. Energy storage system can achieve energy and space-time translation of fast response, with the formation of large-scale possible. The use of energy storage power station in the power generation side of the wind turbine group with the formation of wind reservoir co-generation operation system, ability to use the storage-side fast four-quadrant power adjustment can be achieved to stabilize wind power output fluctuation and improve wind power output quality, increase wind power can be scheduled degree. Storage batteries as energy storage reservoirs wind side part joint operation of the system, its life to the wind co-generation storage system reliability and economy have a crucial impact. Therefore, how to improve the access of large-scale wind power capacity smoothing wind power network fluctuation, and extend battery life and thus reduce the cost, it became the wind co-generation storage systems running Coordinated Control Strategy of the key issues.Firstly build a wind turbine and AC excitation doubly fed generator three-phase static coordinate mathematical model and the two-phase rotating coordinate mathematical model. The use of coordinate transformation and vector control allows the active and reactive power of decoupling control. Use PSCAD / EMTDC simulation software to establish a simulation model of VSCF doubly fed wind power generation system for wind energy to achieve a good track.Secondly, according to the basic principle of building the wind reservoir joint operation of the system, the mathematical model of the wind reservoir joint operation of the system, the energy storage system design parameters according to the main circuit power fluctuation amount of the indicator, feedback linearization theory preclude the use of energy storage design change current controller shows the control block diagram of the converter control system. In the work on the basis of built based on PSCAD / EMTDC wind reservoir simulation platform for joint operation under simulated wind speed two and constant wind velocity mutation stochastic simulation to verify the joint operation of wind storage system for a given joint operation of the power of a good delivery and the effectiveness of the design and the network converter control strategy.Finally, we propose a dual-battery energy storage unit reservoir joint operation of wind power generation operation system, built based on PSCAD / ETMDC wind / dual reservoir simulation platform for joint operation, the target given in the upper wind / reservoir for the combined operation, dual battery energy storage unit can be done to stabilize the fluctuations of wind power and the mandate of the reference power has a good track effect, also in accordance with a given depth of charge and discharge cycles under the proposed four-stage process to run, and the characteristics of a good run, verify the wind / double reservoir coordinated control strategy.