Joint economic dispatch of an AC/DC power system and a heating system

doi:10.3969/j.issn.2097-0706.2024.04.002

Abstract

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

CLC Number:

TK019：TM621

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.

Figures/Tables 6

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Table 1

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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