A Coordinated Power Control Method Applicable to Large-capacity Microgrid

Abstract

The invention discloses a power coordination control method suitable for a large-capacity microgrid. The steps are: the power rolling coordination control function module of the microgrid energy management system is based on the annual exchange power target, and combines the new energy generation power and power consumption in the microgrid. The load calculates the power exchange control target of the day; calculates the annual remaining exchange power according to the completed daily power exchange control target of the day, and calculates it on a rolling basis every day; formulates the daily output of new energy power sources based on the daily power exchange control target calculated in real time every day Curve; through the power decomposition strategy, the decomposed power is distributed to the AGC software function modules of each new energy power station through the telecontrol channel, and then the AGC software function module of each new energy power station adjusts the power generation of the power generation equipment in real time. This method can realize the rolling hierarchical power coordinated control of the large-capacity microgrid and control the annual exchange power with the main grid below the target value, improving the local consumption capacity of new energy and the system stability of the microgrid.

Description

technical field [0001] The invention belongs to the technical field of power dispatching and distribution network automation systems, and in particular relates to a power coordination control method suitable for large-capacity microgrids. Background technique [0002] The traditional grid-connected microgrid has the following characteristics: 1) The voltage level is low, generally below 35 kV; the system scale is small, and the system capacity is not greater than 20MW in principle, and the power supply is mainly renewable energy, mainly including distributed photovoltaics, Fans, etc.; 2) The frequency and voltage of the microgrid are generally controlled by the microgrid central controller (MGCC), so as to ensure the stable operation of load power and electrical equipment; 3) The main feature of the microgrid is to consume energy locally. The annual exchange of electricity between the grid and the external grid generally does not exceed 50% of the annual electricity consumpt...

AI Technical Summary

Problems solved by technology

[0004] The interior of the large-capacity microgrid is no longer the previous new energy power supply, but mainly concentrated photovoltaic power stations, wind farms and solar thermal power stations. The capacity of a single power station is more than tens of MW, and each power station is equipped with automatic power control ( AGC) software function, the active power output of the power generation equipment is adjusted by the AGC software, and the micro-grid central controller is no longer suitable for power coordinated control of large-capacity micro-grids

Images