Expansion Planning of Renewable Energy Power System Considering Flexibility and Economy

doi:10.16183/j.cnki.jsjtu.2020.024

Abstract

Abstract:

The large-scale access to renewable energy such as wind power and photovoltaics brings great uncertainty in power system planning and operation. In order to enhance the ability of high-proportion renewable energy grid to respond to uncertain events and ensure the safe and economic operation, it is necessary to improve the flexibility of the power system. First, based on the perspective of line transmission capacity and safe operation, the flexibility index of the transmission line was defined. Next, considering the economic operation strategy of the system, a multi-objective transmission line planning model based on flexibility and economy was proposed to optimize the flexibility index, investment cost, operating cost, and renewable energy consumption. After that, the NSGAII optimization algorithm was used to solve the model. Finally, the improved Garver-6 and IEEE RTS-24 node systems were taken as examples to analyze the effectiveness of the proposed model. The results show that the planning scheme can improve the transmission capacity of power grids, reduce the probability of renewable energy abandonment, and improve the flexibility and economy of power grid operation.

Key words: power system planning, flexibility, economy, multi-objective optimization, renewable energy

CLC Number:

TM715

LI Lingfang, CHEN Zhanpeng, HU Yan, TAI Nengling, GAO Mengping, ZHU Tao. Expansion Planning of Renewable Energy Power System Considering Flexibility and Economy[J]. Journal of Shanghai Jiao Tong University, 2021, 55(7): 791-801.

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机组编号	接入节点	机组容量/MW	爬坡率/(MW·h^-1)	a_g/[美元·(MW²·h)^-1]	b_g/[美元·(MW·h)^-1]	c_g/(美元·h^-1)
G1	1	150	40	3.597	0	0
WT1	3	360
G3	6	600	120	0.330	0	0

负荷节点	负荷最大值/MW	负荷节点	负荷最大值/MW
1	80	4	160
2	240	5	240
3	40	6	0

规划方案	C_total× 10^-8/ 美元	C_cons× 10^-4/ 美元	C_oper× 10^-8/ 美元	C_penalty× 10^-4/ 美元	FLEX_net
经济性规划	3.201	925.9	3.108	139.0	0.1979
灵活性规划	3.096	1342.5	2.962	0	0.3870

首末节点	电抗(p.u.)	容量/MW	线长/km	已建数目	可扩建数目	首末节点	电抗(p.u.)	容量/MW	线长/km	已建数目	可扩建数目
1-2	0.0139	350	3	1	3	11-13	0.0476	1000	33	1	3
1-3	0.2112	350	55	1	3	11-14	0.0418	1000	29	1	3
1-5	0.0845	350	22	1	3	12-13	0.0476	1000	33	1	3
2-4	0.1267	350	33	1	3	12-23	0.0966	1000	67	1	3
2-6	0.1920	350	50	1	3	13-23	0.0865	1000	60	1	3
3-9	0.1190	350	31	1	3	14-16	0.0389	1000	27	1	4
3-24	0.0839	1200	0	1	0	15-16	0.0173	1000	12	1	3
4-9	0.1037	350	27	1	2	15-21	0.0490	1000	34	2	2
5-10	0.0883	350	23	1	2	15-24	0.0519	1000	36	1	2
6-10	0.0605	350	16	1	2	16-17	0.0259	1000	18	1	2
7-8	0.0614	350	16	2	2	16-19	0.0231	1000	16	1	2
8-9	0.1651	350	43	1	2	17-18	0.0144	1000	10	1	2
8-10	0.1651	350	43	1	2	17-22	0.1053	1000	73	1	2
9-11	0.0839	1200	0	1	0	18-21	0.0259	1000	18	2	2
9-12	0.0839	1200	0	1	0	19-20	0.0396	1000	27.5	2	2
10-11	0.0839	1200	0	1	0	20-23	0.0216	1000	15	2	2
10-12	0.0839	1200	0	1	0	21-22	0.0678	1000	47	1	2

机组编号	机组类型	接入节点	装机容量/MW	机组编号	机组类型	接入节点	装机容量/MW
PV1	光伏	1	576	WT2	风电	21	1200
WT1	风电	15	645	HT1	水电	22	900