Solution to preventing power system from collapse in case of catastrophe

A power system and accident technology, applied in the field of power grid security, can solve problems such as space explosion of alternative strategies, unavoidable power system collapse accidents, etc.

Inactive Publication Date: 2003-11-05
TSINGHUA UNIV
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Problems solved by technology

This status quo is firstly due to the fact that the search problem of the separation strategy of a large-scale power network is a very complicated problem. We have proved in theory that this is an NP-hard problem. As the size of the power grid increases, the space of alternative strategies will occur exponential expl

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  • Solution to preventing power system from collapse in case of catastrophe
  • Solution to preventing power system from collapse in case of catastrophe
  • Solution to preventing power system from collapse in case of catastrophe

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specific Embodiment approach

[0116] The present invention implements by following 3 stages:

[0117] 1. Phase 1: Determine the corresponding indicators for the power balance degree of each isolated island power system, the steady-state security constraints of power equipment and transmission lines, etc. Moreover, based on the graph theory and the characteristics of the grid itself, the necessary processing is carried out on the original grid. This stage is essentially irrelevant to whether the system needs to be disassembled. It belongs to the preparatory stage in the "disassembly strategy search" and can be carried out offline.

[0118] At this stage, from the perspective of graph theory to study the topology of the power grid, an undirected node weighted graph can be used to represent a certain power grid: each bus or node in the power grid is regarded as a node in the graph; each edge in the graph represents A transmission line; the weight of a node is the difference between the power generated by eac...

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Abstract

A policy-making method is composed of three stages of preprocessing and parameter being made as preliminary test for the primitive power network, narrowing search space to satisfy "generator synchronization" and "power balance" for off-the-line tactics collection based on OBDD olgorithm, inspecting "transmission line safety" restriction with quick trend calculation and giving out candidate resonable off-the-line tactics. By time division, the process can be carried out by computer with operation as stages according to long and short periodic off-line layer and then on-line layer.

Description

technical field [0001] The disconnection decision-making method for avoiding power system collapse under catastrophic accidents belongs to the technical field of power network security. [0002] In a large-scale power system, severe local faults can lead to instability of the power system, such as out-of-synchronization (out-of-step) of generator sets, imbalance between power supply and demand, and deviation of power frequency and voltage from the rated range. The development of these phenomena may cause the expansion of accidents and even the collapse of the entire power grid, that is, a large-scale power supply interruption, resulting in serious economic losses. In this case, it is necessary to take effective emergency control measures in time to avoid the collapse of the power system. Disconnection is a control measure that can effectively avoid asynchronous operation or even collapse of the power system. The system works in a "quasi-normal" state, that is, the internal g...

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Application Information

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IPC IPC(8): G06F17/00G06F19/00H02J3/00
Inventor 赵千川孙凯郑大钟卢强马进
Owner TSINGHUA UNIV
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