Method for participating in frequency control of isolated power grid by electrolytic load

Abstract

The invention belongs to the technical field of operation and control of power systems, and in particular relates to a method for participating in frequency control of an isolated power grid by electrolytic load. System frequency adjustment is realized through an electrolytic aluminium load control system; the electrolytic aluminium load control system comprises a network control unit NCU, a dead zone unit, a proportional amplification unit, a WASHOUT unit and an amplitude limiting unit; the proportional amplification unit and the WASHOUT unit are connected in parallel; furthermore, one end is sequentially connected to the dead zone unit and the NCU; the other end is connected to the amplitude limiting unit; the NCU is connected to an isolated power grid system; and the amplitude limiting unit is connected with a WAMS control master station. The method specifically comprises the steps of: (1), establishing an isolated power grid system model; (2), designing the control logic of an electrolytic aluminium load controller under different power disturbance models; and (3), designing parameters of the electrolytic aluminium load controller under different power disturbance models. According to the method disclosed by the invention, the thermal energy storage characteristic of the electrolytic aluminium load is utilized; therefore, effective power adjustment of the electrolytic aluminium load is realized; and the system frequency is kept steady.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a method for electrolytic loads to participate in the frequency control of an isolated power grid. Background technique [0002] The model of using high energy-consuming loads, thermal power, and renewable energy to form an isolated power grid to consume renewable energy locally has attracted widespread attention. As the proportion of renewable energy in the isolated grid gradually increases, the frequency stability of the isolated grid with high penetration of wind power will face major challenges. [0003] For the safe and stable operation of isolated grids with high penetration of renewable energy, one approach is to equip local grids with energy storage devices. However, for local grids containing centralized renewable energy, their capacity is often as high as one million kilowatts , the capacity of conventional energy storage devices ...

AI Technical Summary

Problems solved by technology

However, the single capacity of commercial load and residential load is small and scattered, and it is difficult to gather on a large scale to stabilize the power fluctuation of centralized renewable energy

[0005] The research on the electrolytic aluminum load participating in the frequency control of the system has attracted great attention. However, the existing control methods only aim at the instantaneous power disturbance of the isolated grid, and it is difficult to solve the problem of continuous power disturbance of the isolated grid.

Images