交直流电力系统与供热系统联合经济调度

doi:10.3969/j.issn.2097-0706.2024.04.002

摘要/Abstract

摘要：

随着热电联产等技术的广泛应用，电力系统和供热系统耦合日益紧密，电热联合调度得到了广泛的关注，但现有电热联合调度忽略了热网供电来源的多样性，由此提出了交直流电力系统与供热系统联合经济调度方法。首先，建立交直流电力系统模型，并提出一种线性近似方法对电压源变换器模型所带来的强非线性进行处理；然后，以运行成本最低为目标，建立考虑热网热惯性的交直流电力系统与供热系统联合调度模型，该模型中供热系统通过热电联产机组和交流电锅炉与交流电网耦合，通过直流电锅炉与直流电网耦合；最后，通过算例仿真验证了所提方法的有效性并说明了在电热联合调度中考虑交直流电源的必要性。

关键词: 电热联合调度, 综合能源系统, 热电联产, 交直流耦合系统, 电压源变换器, 非线性, 热惯性, 二阶锥松弛

Abstract:

With the wide application of combined heat and power technology， the coupling between power systems and heating systems is becoming increasingly tight， and the combined heat and power dispatch （CHPD） has received extensive attention. However， existing CHPD models often ignore the diversity of heat sources. To fill this gap， a joint economic dispatch method for AC/DC power systems and heating systems is proposed. Firstly， a linear approximation method is taken to deal with the strong nonlinearity caused by the voltage source converter in a hybrid AC/DC power system model. Then， aiming at minimizing the operating cost， a CHPD model considering the thermal inertia of the heating network is established. In the joint dispatch model， the heating system is coupled with the AC power system through CHP units and AC-driven electric boilers， and coupled with the DC power system through DC-driven electric boilers. Finally， the effectiveness of the proposed method is verified by case studies， and the necessity of taking AC and DC power sources into consideration during the joint economic dispatch of electricity and heat is demonstrated.

Key words: combined heat and power dispatch, integrated energy system, combined heat and power, hybrid AC/DC power system, voltage source converter, nonlinearity, thermal inertia, second-order cone relaxation

中图分类号:

TK019：TM621

史明明, 朱睿, 刘瑞煌. 交直流电力系统与供热系统联合经济调度[J]. 综合智慧能源, 2024, 46(4): 10-16.

SHI Mingming, ZHU Rui, LIU Ruihuang. Joint economic dispatch of an AC/DC power system and a heating system[J]. Integrated Intelligent Energy, 2024, 46(4): 10-16.

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项目	案例1	案例2	案例3
CHP机组成本	1.53	1.61	1.61
燃气轮机成本	2.86	2.57	2.64
购电成本	0.53	0.48	0.49
弃光惩罚成本	0.14	0.07	0.07
总成本	5.06	4.73	4.81