Study on dynamic optimal energy flow of a source-network-load-storage integrated energy system considering its economic benefit

doi:10.3969/j.issn.2097-0706.2022.11.009

Abstract

Abstract:

With the large-scale access of new energy，the power system shows the characteristics of "two-side randomness"，"two peaks" and "two high proportions". In order to ensure the safe，stable and efficient operation of the power system，it is necessary to accelerate the integration of source，network，load and storage and the complementary development of multiple energy. A large amount of new energy can be consumed by Integrated Energy Systems（IESs）. Energy interactions between energy subsystems can be more frequent in an integrated energy system. In order to obtain the data such as interaction characteristics，response time scale and regulation rate of in source，network，load and storage links， the dynamic optimal energy flow analysis of the integrated energy system is made with the goals of economic benefit and high efficiency. Firstly，the mathematical models of the power grid，natural gas network and thermal system in the IES are established，respectively. Then， the overall dynamic analysis model of the multi-energy flow system considering the energy interaction between source， network， load and storage links is constructed， aiming at the lowest economic cost and the highest efficiency of these links. Finally，based on the case study of an integrated energy system including a 6-node power system and a 6-node heating system，its dynamic response and regulation characteristics of the multi-energy flow system are analyzed，which verifies the correctness and effectiveness of the proposed model.

Key words: integrated energy system, electricity-gas-heat combined system, multi-energy flow, optimal energy flow analysis, dynamic analysis, power-grid-load-storage, "two peaks" and "two high proportions"

CLC Number:

TK01

YANG Mei, ZHOU Xichao, WEI Qiang, LIANG Dawei, WU Maoqian. Study on dynamic optimal energy flow of a source-network-load-storage integrated energy system considering its economic benefit[J]. Integrated Intelligent Energy, 2022, 44(11): 63-69.

Figures/Tables 6

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时间	电功率/MW	电价/[美元·(MW·h)^-1]	时间	电功率/MW	电价/[美元·(MW·h)^-1]
01：00	0	50	13:00	11	105
02：00	0	50	14:00	0	50
03：00	0	50	15:00	0	50
04：00	0	50	16:00	0	50
05:00	0	50	17:00	23	170
06:00	0	50	18:00	11	105
07:00	0	50	19:00	0	50
08:00	0	50	20:00	0	50
09:00	4	70	21:00	18	140
10:00	48	280	22:00	12	110
11:00	28	180	23:00	0	50
12:00	13	120	24:00	0	50

方法	总成本/万美元	求解器时间/s	总求解时间/s
稳态最优潮流	49.29	0.87	91.57
动态最优潮流	47.98	5.48	614.76