Hydropower generation optimization and photovoltaic generation consumption in the spot market for electricity

doi:10.3969/j.issn.2097-0706.2022.02.010

Abstract

Abstract:

In the construction of new power system and electricity spot market to achieve the goals of carbon peaking and carbon neutrality,hydropower plays a crucial role in boosting the flexibility of power regulation.But it might reduce the total revenue of power generation.Hydropower generation units can increase their income of power generation by optimizing the output,and strengthen the renewable energy accommodation capacity of the power grid.Taking the spot market for electricity in Zhejiang as the example,the optimal scheduling of hydropower and the consumption of photovoltaic power are studied.The characteristics of hydropower and photovoltaic power in the power spot market and their interrelationship are analyzed.Then,based on the output optimization model of a hydropower unit,an optimal power generation strategy pursuing the maximum power generation revenue under constant power generation and daily power generation capacity is made.Three settle transactions during the trial operation of the energy spot market in Zhejiang are analyzed,and corresponding suggestions for the energy spot market construction and renewable energy accommodation are put forward.

Key words: goals of carbon peaking and carbon neutrality, electricity spot market, PV power, output optimization, renewable energy accommodation

CLC Number:

TK79

WANG Yizheng, HU Jiahua, TANG Qiwen, ZHAO Yiyan, SHEN Qi. Hydropower generation optimization and photovoltaic generation consumption in the spot market for electricity[J]. Integrated Intelligent Energy, 2022, 44(2): 73-79.

Figures/Tables 7

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项目	2020年5月	2020年7月	2021年3月
水电日均发电量/（MW·h）	1 953.29	4 128.20	1 960.81
光伏发电时段内的水电发电量（每日）/（MW·h）	1 515.29	2 995.31	1 418.33
水电、光伏发电量分布的重合率/%	77.60	72.60	72.30
光伏大发时段内的水电发电量（每日）/（MW·h）	586.02	796.19	355.51
净负荷尖峰时段的水电发电量（每日）/（MW·h）	112.88	140.14	89.42
净负荷高峰时段的水电发电量（每日）/（MW·h）	1 254.70	2 359.40	1 275.20

项目	2020年5月（单周）	2020年7月	2021年3月
原有平均电价/[元·(MW·h)^-1]	521.23	449.63	501.29
优化后平均电价/[元·(MW·h)^-1]	566.60	536.40	646.93
优化后水电电费增量/万元	124.08	2 220.77	1 770.57
水电电费增量比例/%	8.7	19.3	29.1

时段		2020年 5月	2020年 7月	2021年 3月
每日光伏发电时段	优化前	1 515.29	2 995.31	1 418.33
每日光伏发电时段	优化后	1 195.72	2 401.45	956.59
每日光伏大发时段	优化前	586.02	796.19	355.51
每日光伏大发时段	优化后	365.03	366.99	45.44
每日净负荷尖峰时段	优化前	112.88	140.14	89.42
每日净负荷尖峰时段	优化后	160.35	144.29	49.07
每日净负荷高峰时段	优化前	1 254.70	2 359.40	1 275.20
每日净负荷高峰时段	优化后	1 304.30	2 050.40	1113.20