Abstract
VSPS (Variable speed pumped storage units) have been introduced into pumped storage power stations in China, but FSPS (conventional fixed speed pumped storage units) still account for a large proportion. The output power regulation range of VSPS and FSPS is wide under power generation conditions. However, under pum** conditions, FSPS units can only pump or shut down at full power rate, while VSPS can only regulate a little range of power. Therefore, if you want to maintain the large power grid operating safely and stably, it is very important to study the coordinated control strategy between units suitable for the pum** condition of pumped storage units. This paper first analyzes the characteristics of VSPS and FSPS outputting power under pum** conditions, and proposes to use the fast power regulation characteristics of VSPS to track dispatching instructions. When the regulation range exceeds the capacity range of VSPS, the pum** power of the units will be smoothly converted to FSPS, Secondly, the simulation model of four terminal HVDC transmission system is established in Matlab/Simulink. Finally, the simulation analysis is carried out for VSPS and FAPS in pum** condition by adopting coordinated control strategy to decrease the outputting power fluctuation of new energy power station, The proposed control strategy can effectively absorb the fluctuation of new energy outputting power and reduce the fluctuation of active power absorbed by load side in HVDC transmission system. At the same time, the capacity ratio of VSPS and FSPS.
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**e, N., Li, H., Han, L., Zhou, Z., Li, Q., Zheng, J. (2022). Research on Coordinated Control Strategy of Variable Speed and Conventional Pumped Storage Units in HVDC Transmission System. In: He, J., Li, Y., Yang, Q., Liang, X. (eds) The proceedings of the 16th Annual Conference of China Electrotechnical Society. Lecture Notes in Electrical Engineering, vol 891. Springer, Singapore. https://doi.org/10.1007/978-981-19-1532-1_57
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