Homogeneous Network Flow Optimization for Regional Gas-Electricity Integrated Energy System

doi:10.12204/j.issn.1000-7229.2020.12.011

Abstract

Abstract:

Current research on integrated energy system (IES) optimization lacks unified and homogeneous work. Due to the main focus on the power transmission grid, it is also not suitable for distribution network with high resistance-to-reactance ratio. The network flow model has the ability to unify and visually represent the energy flow of the transmission grid, distribution network and natural gas network. In this paper, since the characteristics of IES are the same internal essence and similar external forms, a unified homogeneous network flow model of the gas-electricity IES is constructed with the goal of minimizing the total system economic cost and the constraints of system safety are constructed. Heterogeneous energy is homogenized to the unified platform for calculation. Case studies show that this model can clearly show the energy flow and has no limitation of the grid structure. The corresponding algorithm can quickly converge linearly. It can reasonably reflect the characteristics of IES including the distribution network, and provide a reference for unified optimization dispatch of multi-energy flow.

Key words: gas-electricity integrated energy system (GEIES), distribution network, homogeneous, network flow, unified computing

CLC Number:

TM73

HU Xingji, MA Jun, WANG Zhennan, SUI Jiaxin, ZOU Nan, LI Weidong. Homogeneous Network Flow Optimization for Regional Gas-Electricity Integrated Energy System[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(12): 112-122.

Figures/Tables 22

Fig.1 A gas-electricity IES network flow

Fig.2 Flow chart for solving the model

Table 1 Simulation results of IEEE 5-node transmission grid

Table 2 Simulation results of IEEE 14-node transmission grid

Table 3 Simulation results of IEEE 33-node distribution network

Table 4 Comparison of Belgian network gas supply

Table 5 Comparison of Belgian network branch flowMm3/d

Fig.3 Belgian 20-node natural gas system network flow model

Fig.4 GEIES network flow model

Table 6 Output of GEIES energy supply points

Table 7 GEIES branch flow

Fig.5 Voltage and gas pressure in the GEIES

Table A1 IEEE 5-node transmission grid generator parameter

Table A2 IEEE 14-node transmission grid generator parameter

Table A3 IEEE 33-node distribution network generator parameter

Table A4 IEEE 33-node distribution network node parameter

Table A5 IEEE 33-node distribution network branch parameter

Table B1 Belgian network supply node costs

Table B2 Belgian network names node comparison

Table B3 Belgian network branch parameter

Table C1 Gas turbine parameter table

Table C2 Belgian network supply node costs

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