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Multilevel hierarchical control method of transmission congestion management based on multi-source active distribution network

An active distribution network, layered control technology, applied in the direction of load forecasting, electrical components, circuit devices, etc. and the ability of controllable loads, ignoring transmission and distribution network interactions, etc.

Active Publication Date: 2015-06-24
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0004] 1) Regardless of whether the transmission congestion management is carried out by adjusting the output of the generator or reducing the load, it is to use the adjustment and control functions of the power generation and transmission sides, ignoring the large number of distributed resources and the ability to control the load on the demand side
[0005] 2) Ignoring the interaction between the transmission grid and the distribution grid
In the environment of large-scale distributed power and controllable load grid connection, it is difficult to achieve the requirements of coordinated and optimized operation and integrated planning of power transmission and distribution
[0006] 3) The traditional load-based transmission congestion control strategy sacrifices user comfort
It is difficult to realize the requirements of modern power systems to provide users with flexible, reliable, safe and economical energy consumption methods

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  • Multilevel hierarchical control method of transmission congestion management based on multi-source active distribution network
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  • Multilevel hierarchical control method of transmission congestion management based on multi-source active distribution network

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Embodiment approach

[0181] 1 scene introduction

[0182] In this chapter, the IEEE-30 node power transmission system (such as Figure 7 shown) and the distribution system connected at node 19 as an example to verify the correctness of the proposed multi-level hierarchical control strategy for transmission congestion management based on multi-source active distribution network. In the example, it is assumed that the transmission network line L 18-19 failure occurs, causing the critical line L 19-20 The active power flow exceeds the limit of thermal stability, and transmission congestion occurs; this distribution network example uses Figure 8 The improved IEEE typical three-feeder system is shown, in which node 17 is connected to the microgrid, and nodes 8 and 12 are equipped with electric vehicle charging stations. In the simulation process, the maximum output of the microgrid is set to 13+j10MVA, the line thermal stability limit data of the transmission system are shown in Table 1, and the re...

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Abstract

A multilevel hierarchical control method of transmission congestion management based on a multi-source active distribution network includes the steps of acquisition of operating data, active reconstruction operation, active islanding operation, demand response operation and the like. The method has the advantages that controllable resources in the multi-source active distribution network can be fully utilized, topological optimization and active isolating operation of the multi-source active distribution network is dynamically achieved, the power demand of the load end of an upstream transmission line can be effectively lowered, a brand-new idea is provided for the congestion control and management of the transmission line, auxiliary services can be provided for the transmission network congestion management at the premise of ensuring operational safety and stability of the distribution network, transmission line congestion can be partly relieved in emergency situations, power supply reliability of the distribution network can be guaranteed as far as possible, and the network has certain engineering application prospect.

Description

technical field [0001] The invention belongs to the technical field of transmission network congestion management and active distribution network coordination optimization control, and in particular relates to a multi-level layered control method for transmission congestion management based on a multi-source active distribution network. Background technique [0002] The transmission congestion in the power system means that the system cannot meet the desired transmission requirements due to the limitation of its own capacity. In order to ensure the safe and stable operation of the power system, it is of great significance to research and develop effective transmission congestion management strategies. Traditional research on transmission congestion management mainly focuses on three aspects: adjusting generator output, load shedding, and system strengthening (for example, strengthening the thermal stability or voltage stability limits of critical lines with heavy loads or cr...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J13/00
CPCH02J3/00H02J3/388H02J3/003H02J13/00007Y02E40/70Y04S10/50Y04S40/121Y02E60/00
Inventor 刘聪迟福建穆云飞靳小龙孟健张卫欣刘卿李祯祥
Owner STATE GRID CORP OF CHINA
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