A dynamic reliability assessment method for power and natural gas systems based on analytical strategy

A system dynamic, natural gas technology, applied in electrical digital data processing, instrumentation, design optimization/simulation, etc., can solve problems such as error, operation reliability analysis error, etc., achieve the effect of accuracy and reliability, and save computing time

Active Publication Date: 2022-07-19
GUIZHOU POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, different from the power and natural gas multi-energy system, the change of the operating state of the natural gas system due to component failure, such as the change of the flow rate in the natural gas transmission pipeline, has a transient process of several minutes to several hours, and the duration is at the operation level can not be ignored, otherwise it will cause a large error, therefore, the analysis of operational reliability based on this will also produce a large error

Method used

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  • A dynamic reliability assessment method for power and natural gas systems based on analytical strategy
  • A dynamic reliability assessment method for power and natural gas systems based on analytical strategy
  • A dynamic reliability assessment method for power and natural gas systems based on analytical strategy

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Embodiment 1

[0061] refer to figure 1 , which is an embodiment of the present invention, which provides a dynamic reliability evaluation method for a power and natural gas system based on an analytical strategy, including:

[0062] S1: Use the state space method to establish the dynamic reliability model library of power and natural gas equipment and the steady state solution library of the joint optimization power flow of power and natural gas equipment under the first-order fault of each equipment.

[0063] Among them, the topology of power and natural gas equipment includes,

[0064] Multiple edges are used to connect multiple nodes to form a topology structure: nodes include power nodes, natural gas nodes, and coupling nodes; edges include power lines and natural gas pipelines.

[0065] Specifically, the power nodes or between the power nodes and the coupling nodes are connected or not connected by power lines, the natural gas nodes or between the natural gas nodes and the coupling no...

Embodiment 2

[0177] refer to Figures 2 to 6 , in order to verify and illustrate the technical effect adopted in this method, this embodiment selects the traditional technical solution simulation method and the method of the present invention to compare, so as to verify the real effect of this method.

[0178] This case deals with the operation reliability of the power and natural gas multi-energy system composed of the IEEE power and natural gas multi-energy system reliability test system and the Belgian natural gas transmission system in a test case.

[0179] First, initialize the parameters of the power and natural gas multi-energy system. The schematic diagram of the structure of the power and natural gas multi-energy system is as follows figure 2 As shown, the original data of the power and natural gas multi-energy system and natural gas transmission system it contains are derived from public literature, Table 1, Table 5, 6, 7, Table 12 part and "De Wolf D, Smeers Y. The gas transmissi...

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Abstract

The invention discloses a dynamic reliability evaluation method of a power natural gas system based on an analytical strategy. Equation and Laplace transform; combine the transformed differential equation and boundary conditions to obtain the Laplace expression of the natural gas system operating state and calculate the natural gas load shedding under the first-order fault of the equipment; use the first-order failure probability Convolve to obtain the dynamic reliability index of the natural gas system, and use the power system to optimize the power flow to obtain the dynamic reliability index of the power system to complete the evaluation. The present invention can provide decision-making assistance for the system combination, equipment switching, operation plan formulation and emergency fault management. Save computing time.

Description

technical field [0001] The invention relates to the technical field of multi-energy system operation and reliability analysis, in particular to a dynamic reliability evaluation method of an electric natural gas system based on an analytical strategy. Background technique [0002] As the world pays attention to low carbon and sustainable development, natural gas has gradually become an efficient and clean fossil fuel for power generation. According to the monthly energy report released by the U.S. Energy Administration in November 2019, among all primary chemical energy sources for power generation, the proportion of natural gas increased by 14.59% compared with the previous year. Enhanced, these two originally independent energy systems are gradually managed as a combined power-natural gas system, which also provides new possibilities for improving the overall operating efficiency of energy. [0003] However, on the other hand, the deep coupling also brings challenges to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/28G06F113/04G06F113/08G06F119/02
CPCG06F30/20G06F30/28G06F2113/04G06F2113/08G06F2119/02
Inventor 唐学用王盛李庆生孙斌丁一张锐锋张裕包铭磊陈巨龙蒋泽甫李冶张彦孙晓聪胡金迪
Owner GUIZHOU POWER GRID CO LTD
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