A cooperative economic dispatch of active distribution network and island microgrid with intra area battery sharing

doi:10.19799/j.cnki.2095-4239.2021.0285

Abstract

Abstract:

Active distribution networks and isolated micro-grids are typically combined to supply the electricity in remote areas of China. However, it is difficult to eliminate the influence of renewable generation's randomness, volatility, and anti-peak shaving characteristics when using a small-scale battery. At the same time, a large-scale battery will have an impact on the economy. In addition, traditional distribution ring network cabinets are limited by problems such as five-proof interlock protection and sparse standby intervals, which could not provide rapid access to mobile energy storage. In recent years, new switchgear with branch line fast plug-in function has provided the physical basis for the utilization of mobile energy storage. As a result, based on the regional battery sharing mode, this paper proposes a coordinated economic dispatch strategy for active distribution networks and islanded microgrids. Firstly, the truck is proposed to transfer batteries to realize energy storage sharing. The new node cabinet's fast plug-in function establishes a time-shifting model with dynamic vehicle-storage correlation constraints. An active distribution network-microgrid collaborative optimal tidal model is built on this basis by extending the dispatching cycle to 48 h and assessing the uncertainty of renewable energy generation using the distribution robust optimization method. Finally, simulation results based on an IEEE 14-node distribution network and typical microgrids show that the proposed strategy could significantly reduce power grid operation costs while improving rates of renewable energy and energy storage system. As a result, this paper offers a fresh look at the economics of the distribution network and islanded microgrid.

Key words: battery sharing in the area, distributed robustness, distribution network, islanded microgrid, node cabinet

CLC Number:

V 242.3

Biao CHEN, Wei YU, Xufeng FANG, Haoxin LI, Lei CAO, Jun PAN. A cooperative economic dispatch of active distribution network and island microgrid with intra area battery sharing[J]. Energy Storage Science and Technology, 2021, 10(6): 2181-2190.

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支路	R (p.u.)	X (p.u.)	支路	R (p.u.)	X (p.u.)
1-2	0.0075	0.010	8-9	0.008	0.011
1-3	0.011	0.011	8-10	0.011	0.011
1-4	0.011	0.011	3-11	0.011	0.011
2-5	0.009	0.018	4-12	0.009	0.012
2-6	0.008	0.011	4-13	0.004	0.011
5-7	0.004	0.004	13-14	0.004	0.011
3-8	0.008	0.011

方案	共享能量/MW·h	配电网损耗/MW·h	总运行成本/元
1	10.14	5.41	305760.27
2	0	7.22	319023.05
3	9.83	5.95	306855.68

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