Static sensitivity analysis method oriented to integrated electricity and gas system

A technology of integrated energy system and static sensitivity, applied in the field of electric-pneumatic coupled integrated energy system, can solve problems such as insufficient consideration

Active Publication Date: 2018-08-17
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

[0005] However, the above research focuses on the power flow calculation of IEGS, and does not fully consider the influence of different energy supply network states (such as network topology, pipeline structure, load level, etc.) on the interaction between different energy sources in the integrated energy system, and how to determine the weak link of IEGS

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  • Static sensitivity analysis method oriented to integrated electricity and gas system
  • Static sensitivity analysis method oriented to integrated electricity and gas system
  • Static sensitivity analysis method oriented to integrated electricity and gas system

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Embodiment 1

[0045] A static sensitivity analysis method for electric-pneumatic coupled integrated energy systems, see figure 1 , the static sensitivity analysis method includes the following steps:

[0046] 101: Establish an IEGS unified power flow model consisting of a gas system model, a power distribution system model, and an energy coupling link model;

[0047] 102: Obtain the current stable operating point and the Jacobian matrix of the current operating point according to the IEGS unified power flow model;

[0048] 103: According to the Jacobian matrix, calculate the gas pressure-gas load sensitivity and the light gas turbine output-node injection power sensitivity, so as to calculate the gas pressure-node injection power sensitivity;

[0049] 104: Sorting the gas pressure-node injection power sensitivity, the node set with higher sensitivity is the weak link of IEGS.

[0050] In summary, the embodiment of the present invention considers the network status of the electricity-gas s...

Embodiment 2

[0052] Combined with the specific calculation formula, figure 2 1. The specific example further introduces the scheme in embodiment 1, see the following description for details:

[0053] 201: IEGS modeling;

[0054] The embodiment of the present invention takes IEGS including natural gas network (Natural Gas System, NGS), power distribution system (Power Distribution System, PDS) and coupling links as an example to verify the effectiveness of the method.

[0055] Among them, NGS is composed of gas source, gas pipeline, gas load, compressor, valve and so on. The valve is used to control the flow or cut-off of gas in the pipeline. It is assumed that the valve is only in two states: fully open or fully closed, so the network topology of NGS is determined. IEGS is connected to the large power grid through distribution transformers and it is assumed that IEGS has signed a power supply contract with the upstream power grid. The energy coupling link is a key link in the interacti...

Embodiment 3

[0125] The following is a specific calculation example, combined with Figure 3-Figure 8 To verify the feasibility of the scheme in Examples 1 and 2, see the following description for details:

[0126] In order to verify the effectiveness of this method, a typical IEGS is taken as an example to illustrate the simulation. Such as image 3 As shown, the IEGS calculation example of the embodiment of the present invention is formed by coupling the IEEE-33 node power distribution system and the modified 11-node gas network through MT [13,17] , EBi and GBi represent grid nodes and gas nodes, respectively.

[0127] The distribution network is connected to the external large power grid through EB1. Assume that the electric power obtained by the distribution network and the external large power grid is 3500kW. At this time, EB1 is a PV node. MT connects GB11 of the gas network and EB2 of the distribution network as a balanced unit, so EB2 is the balance node of the distribution netw...

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Abstract

The invention discloses a static sensitivity analysis method oriented to an integrated electricity and gas system, and is used for analyzing an interaction mechanism between electricity and gas energysupply systems. The method comprises the following steps that: firstly, giving the uniform tidal current model of the integrated electricity and gas system; on the basis, defining the gas pressure-node injection power sensitivity of the integrated electricity and gas system; and finally, combining with an integrated energy system sensitivity index under a typical scene to analyze the influence ofpower grid node injection power on gas pressure, and positioning the weak link of the integrated energy system. An example indicates that the method can provide auxiliary information for the safe andstable operation of the regional integrated energy system, and the safety of the system is effectively improved.

Description

technical field [0001] The invention relates to the field of electric-pneumatic coupling comprehensive energy systems, in particular to a static sensitivity analysis method of electric-pneumatic coupling comprehensive energy systems based on a unified power flow model. Background technique [0002] With the increasing scarcity of fossil energy and the continuous deterioration of the environment, energy transition has become the only way to achieve sustainable economic and social development. It is an important way to promote the above process to break the existing mode of separate planning and independent operation of each energy supply system, and realize the energy system towards a new energy system with multi-energy integration and integrated complementarity. For this reason, the "Thirteenth Five-Year Plan for Energy Development" clearly proposes to "implement multi-energy complementary integrated optimization projects" and "coordinate the planning of infrastructure such ...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06G06F17/50
CPCG06Q10/06393G06Q50/06G06F30/20
Inventor 穆云飞骆柏锋余晓丹贾宏杰
Owner TIANJIN UNIV
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