Research and Application of Key Technologies for Real-time Dispatching and Control of Multi-level Power Grid with Adjustable Load

Abstract

With the rapid development of new energy and new power load, the uncertainty of both sides on the source and load increases gradually, which brings more challenges to the power grid frequency control. So, it is urgent to bring adjustable load into the real-time dispatching area to improve the operation stability and regulation capacity of power grid. Firstly, the feasibility of taking the adjustable load as the control object of automatic generation control (AGC) is analyzed. Then, taking the electric vehicles into power grid frequency regulation as the application scenario of adjustable load participating in multi-level power grid real-time regulation are proposed. Through the construction of the security access area, the application of multi-load regulation terminal and other key technologies, the real-time perception and control of adjustable load based on the second-level interval by multi-level dispatching center are introduced. The effectiveness and superiority of the proposed technical route are verified through the demonstration project of multi-level coordinated regulation of source, grid, load, and storage (SGLS) in Southwest China Power Grid. Finally, further research directions and potential development suggestions are put forward for the large-scale adjustable load normally participating in the real-time dispatch and control of the power grid.