Distributed Energy Storage Layout for Voltage-Aware Grid Planning
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Solution Overview
Problem
Existing methods for planning distributed energy storage systems in power distribution networks fail to determine optimal construction positions and ensure orderly energy storage, leading to inefficiencies and potential voltage violations.
Innovation Solution
A distributed energy storage planning method that sets a mathematical indicator for evaluating construction positions, plans an optimal laying path for energy storage assemblies, and prioritizes energy storage operations based on this path to achieve globally optimal planning benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distributed energy storage is planned without determining construction positions, then energy storage operations can be performed, but the planning benefit cannot be globally optimal and construction costs increase
Solution Approach 1:
The patent applies preliminary action by establishing a location evaluation indicator system before actual energy storage construction. The system pre-evaluates potential construction positions using multiple indicators (voltage quality, network loss, load characteristics) to determine optimal locations in advance, ensuring global planning optimality while avoiding ad-hoc construction decisions that would increase costs and complexity
Solution Approach 2:
The patent transforms the construction position determination problem into a parameter optimization problem by defining quantitative location evaluation indicators. These indicators convert qualitative planning benefits into measurable parameters (voltage deviation, power loss, load matching degree), enabling systematic optimization of construction positions across the distribution network
2Loss of energy
If energy storage assemblies are constructed without an optimal laying path, then construction can proceed, but orderly energy storage cannot be implemented and energy losses increase
Solution Approach 1:
The patent applies local quality by evaluating different locations in the distribution network with location-specific indicators tailored to local conditions. Each potential construction position is assessed based on local voltage characteristics, local load patterns, and local network losses, ensuring that energy storage units are placed where they can most effectively reduce energy losses and improve local grid performance
Solution Approach 2:
The patent establishes the optimal laying path through preliminary evaluation using location indicators before construction. This pre-planning determines the sequence and positions of energy storage assemblies along the distribution network, ensuring orderly deployment that maximizes energy efficiency and minimizes losses from the outset
3Adaptability or versatility
If distributed photovoltaic permeability increases, then renewable energy utilization improves, but voltage violation becomes more serious
Solution Approach 1:
The patent introduces distributed energy storage as an intermediary element between distributed photovoltaic generation and the distribution network. The energy storage units act as buffers that can absorb excess photovoltaic generation during high production periods and release energy during peak demand, thereby stabilizing voltage levels while enabling high renewable energy penetration without voltage violations
Data Source
AI summary
Provided are a distributed energy storage planning method and system for a power distribution network. The method includes a step S1 of setting a mathematical indicator for quantitatively evaluating superiority and inferiority of construction positions of distributed energy storage assemblies as a location evaluation indicator in a distribution area of a distributed power supply, a step S2 of planning an optimal laying path of the distributed energy storage assemblies in a planning area based on the location evaluation indicator and a step S3 of constructing the distributed energy storage assemblies according to the optimal laying path and connecting the distributed energy storage assemblies to the power distribution network to perform an energy storage operation so that the distributed power supply performs orderly energy storage on the distributed energy storage assemblies in the power distribution network.