Energy Storage Damping Control for Low-Carbon Grid Oscillations
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Solution Overview
Problem
The integration of low-carbon energy storage power stations in power systems increases the complexity of stability control, leading to significant low-frequency power oscillation risks, which threaten the safety and stability of the power grid, and existing methods lack effective and standardized solutions for oscillation suppression.
Innovation Solution
A method is developed to construct a correlation among oscillation modes, energy storage power stations, and damping controller parameters, creating a model that matches real-time power system oscillations with oscillation control strategies to suppress low-frequency oscillations, using a correlation table and knowledge base to determine the appropriate energy storage stations and damping controller settings for effective oscillation suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If energy storage power stations are introduced to achieve real-time power balance and consume clean energy, then the proportion of low-carbon power generation increases, but the stability control mechanism becomes more complex and low-frequency power oscillation risk increases significantly
Solution Approach 1:
The patent segments the stability control problem by identifying specific oscillation modes (inter-area oscillations, local oscillations) and matching them with specific energy storage power stations based on their locations and characteristics. This segmentation allows targeted control strategies for different oscillation modes rather than treating the entire system uniformly.
Solution Approach 2:
The patent introduces an oscillation mode matching mechanism as an intermediary that connects power system oscillations with energy storage power station responses. This intermediary layer analyzes oscillation characteristics and selects appropriate energy storage stations to suppress specific oscillation modes, simplifying the overall control mechanism.
2Productivity
If traditional power dispatching methods are used for energy storage power stations, then peak regulation and energy consumption cleaning functions are achieved, but oscillation suppression capability is insufficient and lacks standardized methods
Solution Approach 1:
The patent makes energy storage power stations multi-functional by enabling them to perform not only peak regulation and energy consumption cleaning but also oscillation suppression. The oscillation mode matching mechanism allows the same energy storage infrastructure to serve multiple purposes, including suppressing inter-area and local oscillations.
Solution Approach 2:
The patent establishes a standardized oscillation mode matching mechanism in advance that pre-identifies which energy storage power stations should respond to which oscillation modes. This preliminary configuration enables rapid oscillation suppression when oscillations occur, without requiring ad-hoc analysis during disturbance events.
Data Source
AI summary
The present disclosure provides an oscillation suppression method for a low-carbon power system based on energy storage power stations. Firstly, constructing a power system oscillation suppression model; secondly, constructing a correlation table of the oscillation modes vs the energy storage stations and a correlation table among the damping controller parameters, a delay margin and a damping ratio; thirdly, based on a real time power system oscillation mode, searching for a matching oscillation mode and a oscillation control strategy from the oscillatory control strategy knowledge base that based on the energy storage power stations, and suppressing the power system oscillations based on the oscillation control strategy. Thus providing an effective method to the stable control of the power system, and solving a problem of power system oscillation suppression, which seriously affects the stable operation of the power system, in the coordinated scheduling of source network load storage.