Control method and system for secondary allocation of local power grid energy and power

Abstract

The invention relates to a control method and system for secondary allocation of local power grid energy and power. The control system comprises a data service center, a simulation analysis center and an energy routing center. According to the method, a local power grid serves as the research object, scattered access to the power grid of renewable energy sources and user power utilization are taken into consideration, and the operation state of the power grid, the short-term power utilization plan of a user and the scattered power source short-term output are monitored dynamically. The simulation analysis center simulates the power grid operation state of the next control cycle according to the power utilization plan and the output prediction data, determines the loading vacancy or the electricity vacancy of the local power grid and uploads the power grid state and the relation between supply and demand to the energy routing center. The energy routing center conducts charging / discharging control on an energy storage system based on the current SOC of the energy storage system to form a new loading demand or electricity injection, coordinates the output and power utilization loading of a scattered power source, completes the secondary allocation of the energy and power and achieves complementation of multiple kinds of energy sources and new balance between supply and demand.

Description

technical field [0001] The invention relates to a control method and a control system for a local power grid, in particular to a coordinated control method and a control system for a distributed energy storage system participating in secondary distribution of energy and power in a local power grid. Background technique [0002] The energy configuration of the traditional power grid mainly depends on the power transmission and distribution network. Due to the immediacy of power production and power consumption (instantaneous use), in power supply planning, power transmission and distribution network construction, etc., various levels of backup are often used to adapt to changing conditions. Load demand, to achieve supply and demand balance. Among them, about 10-35% of the power sources only participate in the operation during the peak load, and there is a long-term problem of low overall efficiency of backup power assets. [0003] The development and utilization of renewable...

AI Technical Summary

Problems solved by technology

With the emergence of technologies such as smart electricity consumption, end users will no longer be just power loads, but also have the characteristics of power sources. The energy distribution method based on traditional power grid generation, transmission, distribution, and one-way energy transmission is no longer applicable; another On the one hand, the output distribution of renewable energy does not match the load curve distribution of the power grid. For example, photovoltaic power is concentrated during the day, while wind energy is mostly distributed at night. This requires a mechanism for coordinated source-load management.

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