摘要
当前配电终端微电网调峰技术忽略了对太阳能发电场出力波动频率的分析,导致该调峰技术无法适用于高比例太阳能接入的配电网,且调峰耗时较长。提出一种高比例太阳能接入配电终端的微电网调峰技术。分析高比例太阳能接入配电终端对供电网供电所产生的影响,构建太阳能发电场出力波动区间;将两者作为调峰分析和机组优化调度的基础,从电力系统负荷相关性出发,设定最小负荷方差和运行成本为目标函数,构建微电网调峰模型;采用改进的PSO算法求解微电网调峰模型,得到最佳调峰方案。实验结果表明,太阳能发电出力波动区间为20~50kW时,测试区域在调峰后,发电煤炭的日均量低至3.646万t,SO2排放量可控制在80t以下,且微电网调峰用时始终低于30ms。所提方法不仅能够获取满意的调峰方案,还能够有效降低调峰耗时。
The existing peak regulation technology of distribution terminal microgrid ignores the analysis of the output fluctuation frequency of the solar power field,resulting in that that the peak regulation technology cannot be applied to the distribution network with high proportion of solar energy access and it takes a long time to regulate the peak power.Therefore,this paper proposes a new microgrid peak regulation technology for the high proportion of solar energy access to distribution terminals.The influence of a high proportion of solar power access to distribution terminals on the power supply network is analyzed,and the output fluctuation interval and probability model of the solar power field are constructed through the probability density function of solar power and the prediction error of solar power.The minimum load variance and operating cost are set as objective functions to construct the peak load regulation model of microgrid based on the load correlation.The improved PSO algorithm is used to solve the peak regulation model of micro-grid and the optimal scheme is obtained.The results show that when the output fluctuation range of solar power generation is between 20 kW and 50 kW,the average daily quantity of coal for power generation in the test area is as low as 36,460 tons after peak shaving,the emission of sulfur dioxide can be controlled below 80 tons,and the peak shaving time of micro-grid is always less than 30ms.The experimental results show that the proposed method can obtain satisfactory peak-shaving scheme and effectively reduce peak-shaving time.
作者
吴昊文
张乐平
张维
张鑫
乔舒雅
WU Haowen;ZHANG Leping;ZHANG Wei;ZHANG Xin;QIAO Shuya(Digital Grid Research Institute of CSG,Guangzhou 510700,Guangdong,China;Zhejiang Chint Instrument&Meter Co.,Ltd.,Hangzhou 310052,Zhejiang,China)
出处
《电网与清洁能源》
CSCD
北大核心
2023年第2期122-127,共6页
Power System and Clean Energy
基金
中国南方电网有限责任公司科技项目(670000KK52200011)
关键词
高比例太阳能
配电终端
微电网
调峰技术
high proportion of solar energy
power distribution terminal
microgrid
peak shaving technology
