Nowadays,electric and gas systems play an important role in maintaining the stability,economy,and flexible operation of microgrids.When disturbed by electricity and natural gas loads,the controller needs to coordinate the microgrid frequency and the gas pressure of natural gas pipeline nodes.To this end,a frequency-pressure coordinated control strategy of electrical-gas interconnection system based on SAC algorithm is proposed.Firstly,based on the operating characteristics analysis of natural gas pipeline network and coupling equipment,a dynamic model of natural gas transportation is established.Secondly,based on the randomness of controllable load users'behavior,a microgrid load frequency control model is established,which includes micro gas turbines(MT),electric to gas(P2G)equipment,controllable loads,distributed power sources and loads.In addition,the structure of the controller is designed based on the two control objectives of microgrid frequency and air pressure.Finally,simulation is conducted under different operating conditions,and the results show that the proposed strategy can coordinate the frequency and air pressure of the system.
关键词
频率控制/微电网/电气耦合系统/SAC算法/柔性负荷
Key words
frequency control/microgrid/electro pneumatic coupling system/SAC algorithm/flexible load
维普
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