面向高比例光伏并网的火电爬坡压力缓解策略

doi:10.3969/j.issn.2097-0706.2022.01.001

摘要/Abstract

摘要：

研究高比例光伏并网条件下火电爬坡压力缓解策略对提高光伏消纳水平、保障火电机组稳定运行具有重要意义。首先对高比例光伏并网下电网的安全稳定问题进行分析,进一步构建了含光伏、火电、直流调制以及储能系统的“源-网-储”协调优化模型,充分利用储能系统的可时移特性和直流调制的快速响应性对并网光伏进行消纳。然后在改进的IEEE-24节点系统上对所提协调优化模型和策略进行仿真分析,结果验证了所提策略的优越性和有效性。最后得出所提策略在降低系统运行成本的同时,可有效缓解火电爬坡压力,提高系统光伏消纳能力,保障电网安全有效运行的结论。

关键词: 光伏消纳, 直流调制, 储能系统, 火电机组爬坡率, 净负荷曲线, 高比例光伏并网, “源-网-储”协调

Abstract:

It is of great significance to study the strategy for relieving ramp pressure of thermal power units with high proportion photovoltaic power connecting to the grid for improving the level of photovoltaic power consumption and stabilizing the operation of thermal power units.Analyzing the security and stability of the grid with high-proportion photovoltaic power,a "source-grid-storage" coordination and optimization model for photovoltaic power,thermal power,DC modulation and energy storage system is constructed.The model makes full use of the time-shifting characteristics of energy storage systems and the fast response of DC modulation to consume grid connected photovoltaic power.The proposed model is simulated on an improved IEEE-24 bus system,and the simulation results verify the superiority and effectiveness of the proposed strategy.This strategy can effectively alleviate the ramp pressure of thermal power units,improve the photovoltaic capacity and ensure the safe and effective operation of the power grid with a reduced system operation cost.

Key words: photovoltaic consumption, DC modulation, energy storage system, thermal power unit ramp rate, net load curve, high-proportion PV power grid connection, "source-grid-storage" coordination

中图分类号:

TK01

张兴科, 魏朝阳, 王康平, 田浩, 缪鹏飞, 周霞, 魏聪. 面向高比例光伏并网的火电爬坡压力缓解策略[J]. 综合智慧能源, 2022, 44(1): 1-8.

ZHANG Xingke, WEI Chaoyang, WANG Kangping, TIAN Hao, MIAO Pengfei, ZHOU Xia, WEI Cong. Strategies for relieving ramp pressure of thermal power units with high-proportion photovoltaic power connecting to the grid[J]. Integrated Intelligent Energy, 2022, 44(1): 1-8.

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节点	最小出力/MW	最大出力/MW	成本/[美元·(MW·h)^-1]
^#1	62.4	192	19.10
^#2	62.4	192	19.10
^#7	75.0	300	37.00
^#13	207.0	519	32.00
^#14	54.3	155	16.53
^#15	66.3	215	16.53
^#22	60.0	300	15.20