Integrated Transmission Distribution Network Dispatching via Segmentation

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Solution Overview

Problem

The coordinated dynamic dispatch of transmission and distribution networks faces challenges due to high dependence on information interaction and communication, as these networks are managed independently, making centralized coordination difficult.

Innovation Solution

A dispatching method and device for an integrated transmission and distribution network that establishes a dispatch model with an objective function to minimize total generation cost, solving for dynamic dispatch parameters including boundary transferred power and generator outputs, allowing for decentralized, non-iterative dispatching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If centralized coordinated dispatch of transmission and distribution networks is implemented, then optimal dispatch parameters can be achieved, but high dependence on information interaction and communication is required

Engineering Contradiction:

Improvedispatch optimizationVSAvoidinformation interaction complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the integrated transmission and distribution network into independent transmission network units and distribution network units. Each unit independently constructs and solves its own dispatch model, avoiding the need for complex centralized information interaction. The segmentation allows parallel processing while maintaining coordination through boundary power exchange constraints.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If transmission network and distribution network are managed by independent operators, then operational independence is maintained, but coordinated dispatch becomes difficult

Engineering Contradiction:

Improveoperational independenceVSAvoidcoordinated dispatch

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent enables each operator to independently manage their network by segmenting the dispatch problem into separate transmission and distribution units. Each unit independently formulates and solves its dispatch model while coordinating through boundary conditions, thus maintaining operational independence while achieving coordinated dispatch.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces boundary transferred power as an intermediary variable that connects the transmission and distribution networks. This intermediary enables coordination between independent operators without requiring direct centralized control, as the boundary power exchange serves as the mediation mechanism for achieving overall system optimization.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If repeated information interaction and iterations are used for coordinated dispatch, then coordination between networks is achieved, but execution stability is reduced

Engineering Contradiction:

Improvenetwork coordinationVSAvoidexecution stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent performs preliminary actions by having each network unit independently construct and solve its dispatch model before coordination is needed. The transmission network unit solves its model first, then the distribution network unit uses the results to solve its model, eliminating the need for repeated iterations and improving execution stability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Each network unit independently serves itself by constructing and solving its own dispatch model without relying on repeated interactions with the other unit. The transmission network unit independently optimizes its generation resources, and the distribution network unit independently optimizes its load management, reducing dependence on communication and improving reliability.

Inventive Principle:

Principle #25Self-service

4Productivity

If centralized dispatch model is used for integrated network, then optimal generation cost is achieved, but communication requirements increase

Engineering Contradiction:

Improvegeneration cost optimizationVSAvoidinformation security

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent segments the centralized dispatch model into independent transmission and distribution network models. Each unit only handles and transmits necessary boundary information (transferred power) rather than all system information, reducing information loss and improving security while still achieving overall cost optimization through coordinated boundary conditions.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11239658B2Dispatching method and device for integrated transmission and distribution network

Publication Date: 2022.02.01 TSINGHUA UNIVERSITY

AI summary

The present disclosure provides a dispatching method and a dispatching device for an integrated transmission and distribution network. The integrated transmission and distribution network include a transmission network and at least one distribution network. The method includes: establishing a dispatch model of the integrated transmission and distribution network; solving the dispatch model to obtain dynamic dispatch parameters for the integrated transmission and distribution network, in which the dynamic dispatch parameters comprise a boundary transferred power from the transmission network to each of the at least one distribution network, and power outputs of all generators in the transmission network and each of the at least one distribution network; and dispatching the integrated transmission and distribution network based on the boundary transferred power and the power outputs of all the generators in the transmission network and each of the at least one distribution network.