Tandem type treatment device for long-distance low-voltage power supply problem of power grid and control method thereof

Abstract

The invention provides a power grid long-distance low-voltage power supply problem series connection type treatment device and a control method thereof. The device comprises a rectification module, an inversion module, an energy storage battery module, a control system special module, a communication module and a bypass switch. The rectification module and the inversion module are connected in series and then are connected between an AC power distribution network and a user side. The energy storage battery module is connected with a direct current bus between the rectifier module and the inverter module; the control system special module is connected with the rectifier module, the inverter module, the energy storage battery module and the control end of the bypass switch; the bypass switch is connected between the AC power distribution network and the user side. Aiming at a typical power consumption scene of a long-distance low-voltage single-user independent power supply scene of a remote weak-connected power grid, the system is connected to the front end of a user side in a series connection manner, isolation of the user side and a line side is realized, micro-grid power supply technology research is carried out through an optimal energy control strategy, the power supply cost is reduced, and the power consumption demand of a line end user is met; the problems of power shortage and power limitation in the current rural power grid are solved.

Description

technical field [0001] The invention relates to the application field of energy storage technology, in particular to a series-connected treatment device for long-distance low-voltage power supply problems in a power grid and a control method thereof. Background technique [0002] The rural power grid in remote areas is far from the core area of ​​the distribution network, and generally has the characteristics of large power supply radius in the station area, long transmission lines, outdated equipment performance, low power reliability and poor power quality. Affected by topography, there are a large number of single-radiation long-line low-voltage weak grids in rural areas, and the reliability of power supply is severe. In addition, due to the ubiquitous seasonal loads and unbalanced loads in rural power grids, the contradiction between residential electricity consumption and production electricity consumption is prominent, and the residents' complaint rate remains high. It...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a long-distance low-voltage power supply problem series-type treatment device and its control method, which solves the problem of low-voltage single households at the end of the line commonly existing in remote weak-connected power grids due to insufficient power. Power quality problems such as low voltage and frequent and large-scale fluctuations in voltage

Images