Research on optimal operation of distribution network with electric springs

The Journal of Engineering

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[1] Global Energy Interconnection Research Institute, Future Sciences & Technology City, Changping District, Beijing, 102209, People's Republic of China;Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Shanghai, People's Republic of China;Shanghai Electric Power Technical Research Institute of State Grid, No. 171 Handan Road, Hongkou District, Shanghai, People's Republic of China;

关键词: optimisation;    distribution networks;    renewable energy sources;    distributed power generation;    load flow;    NCL;    distribution network system;    optimal operation;    electric spring;    ES;    power management;    wide voltage operational range;    intermittent energy resources;    fluctuating renewable energy resources;    voltage drop;   

DOI  :  10.1049/joe.2018.8919

来源: publisher

【 摘 要 】

The electric spring (ES) is a kind of electric device used for energy buffering, based on voltage and power management. ES transfers the voltage (or energy) fluctuation in the main bus to the non-critical load (NCL), stabilises the main voltage for critical load, and actively adjusts the power consumption of the NCL to achieve regulation goals of distribution network with wide voltage operational range of NCL. With lots of intermittent and fluctuating renewable energy resources into the energy Internet, the smart load integrated with the ES will play a greater role in the optimal operation of the distribution network. Here, the power flow optimal model of distribution network with the ES is proposed. Under different load levels, the flexible regulation of ES can reduce the overall voltage drop and optimise the operation of distribution network. The benefits of ES for the optimisation of distribution network are verified based on an improved IEEE 33-node case. Numerical results show that the ES relieves the voltage drop of the distribution network and improves the reliability of distribution network based on the interaction between the ES and NCL. The overall energy efficiency and reliability of the distribution network system are improved.

【 授权许可】

CC BY