Virtual Power Plant Feasible Region Under AC Safety Constraints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power system dispatching and operation modes fail to adapt to the integration of massive distributed energy resources, particularly in determining the feasible range of active and reactive power that a virtual power plant can provide to the transmission grid.
Innovation Solution
A method and apparatus for identifying the power feasible region of a virtual power plant, involving the establishment of a static safety-constrained model based on alternating current power flow equations, followed by a power feasible region model using a feasible region vertex enumeration algorithm to calculate the feasible region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional dispatching and operation mode based on decoupling of power transmission grid and power distribution network is used, then the system structure is simple and easy to operate, but it cannot adapt to massive access of distributed energy resources and cannot determine the feasible range of active and reactive power that virtual power plant can provide
Solution Approach 1:
The patent segments the power system into virtual power plant modules that can independently calculate their power feasible regions. Each distributed energy resource is treated as a separate controllable unit within the virtual power plant, allowing modular integration without requiring complete reconfiguration of the conventional decoupled system structure.
Solution Approach 2:
The patent introduces a power feasible region calculation model as an intermediary layer between the distributed energy resources and the conventional dispatching system. This model translates the complex constraints of multiple distributed resources into a standardized feasible region representation that the conventional system can process, enabling adaptation without direct structural changes.
2Reliability
If static safety-constrained model based on alternating current power flow equations is established, then the safety and reliability of power system operation is improved, but the calculation complexity and time consumption increase
Solution Approach 1:
The patent performs preliminary calculation of the power feasible region by establishing the static safety-constrained model and calculating vertex coordinates in advance, before actual dispatching decisions are made. This pre-computation stores the feasible region boundaries and constraints, allowing rapid query and application during real-time operation without repeated complex calculations.
Solution Approach 2:
The patent implements a dynamic approach where the power feasible region is calculated based on current operation basic data and can be updated as conditions change. The system dynamically adjusts the feasible region boundaries by recalculating vertex coordinates when input parameters change, balancing computational accuracy with operational responsiveness.
Data Source
AI summary
The disclosure provides a method for identifying a power feasible region of a virtual power plant, and an apparatus for identifying a power feasible region of a virtual power plant. The method includes: S1, obtaining operation basic data of the internal power-distribution system; S2, establishing a static safety-constrained model of the virtual power plant based on the operation basic data, in which the static safety-constrained model is based on alternating current power flow equations; S3, establishing a power feasible region model of the virtual power plant based on the static safety-constrained model; and S4, calculating the power feasible region model based on the operation basic data and a feasible region vertex enumeration algorithm to obtain the power feasible region of the virtual power plant.