Optimal scheduling of integrated energy systems in agricultural parks based on improved probability planning algorithm

doi:10.3969/j.issn.2097-0706.2023.10.005

Abstract

Abstract:

To address the problems of high energy consumption and low renewable energy accommodation capacity in an integrated energy system of an agricultural park， an optimal scheduling method based on improved dynamic probabilistic planning is proposed for the system. The overall structure of an integrated energy system is established considering the diversity of energy sources in the agricultural park. Then， based on the loads' adjustability of the agricultural park， the optimal scheduling model for the integrated energy system is established with the minimum total operating cost as the objective function. Finally， by replacing Gaussian probability distributions with triangular probability distributions， the uncertainty optimization problems of probabilistic planning algorithm are transformed into deterministic optimization problems. Testing the improved probabilistic planning algorithm on an agricultural park in the Northwest of China， the test results show that the proposed algorithm can reduce the comprehensive operation cost of the integrated energy system in the agricultural park. In summer， the daily operating cost of the system can be reduced by 45.52%， and the new energy consumption rate can be increased by 35.57 percentage points.In winter， the daily operating cost of the system is reduced by 37.42%， and the new energy consumption rate is increased by 26.25 percentage points.

Key words: integrated energy system, agricultural park, renewable energy, probability planning algorithm, Gaussian probability distributions, adjustable load, new energy consumption rate

CLC Number:

TK019

LIU Yanru, ZHANG Ruiping, DONG Haiying. Optimal scheduling of integrated energy systems in agricultural parks based on improved probability planning algorithm[J]. Integrated Intelligent Energy, 2023, 45(10): 35-43.

Figures/Tables 13

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类型	时段	价格
峰值电价	07:00—11:00 19:00—20:00	0.97
平值电价	11:00—18:00 21:00—23:00	0.61
谷值电价	23:00—07:00	0.35

设备	维护费用
光伏发电设备	0.015
风力发电设备	0.098
余热锅炉	0.020
微型燃气轮机	0.080
沼气锅炉	0.020
蓄电池组	0.010
空气源热泵	0.030

设备	参数	数值
光伏太阳能板	发电功率上限/kW	500
风力发电系统	发电功率上限/kW	200
微型燃气轮机	最大发电功率/kW	200
	发电效率	0.35
	热损耗系数	0.03
沼气锅炉	制热效率	0.90
沼气锅炉	制热功率上限/kW	200
余热锅炉	热回收效率	0.60
余热锅炉	热输出效率	0.80
电制热设备	制热效率	2.30
电制热设备	热功率输出上限/kW	400
电制热设备	制冷效率	3.40
电制热设备	冷功率输出上限/kW	140
空气源热泵	热转换系数	3.64
空气源热泵	换热功率上限/kW	200

典型日	参数	优化前	优化后
夏季典型日	总费用/元	6 355.0	3 462.1
夏季典型日	新能源消纳率/%	60.38	95.75
冬季典型日	总费用/元	9 633.7	6 028.3
冬季典型日	新能源消纳率/%	72.15	98.40