Optimal Dispatching of Integrated Electricity and Heating System with Multiple Functional Areas Considering Heat Network Flow Regulation

Abstract

The integrated electricity and heating system (IEHS) can satisfy the diversified energy demand and improve energy efficiency through electro-thermal synergy and complementarity, which is beneficial for energy transformation and global climate governance. To reduce the operation cost, renewable energy source (RES) abandonment, and purchased electricity of IEHS, an optimal dispatching method of IEHS with multiple functional areas considering the flow regulation of the heat network is proposed. Firstly, the functional area of IEHS is classified and the functional area’s load characteristics are analyzed. Secondly, a heat network model considering refined resistance and dynamic characteristics is constructed and the operation regulation modes of the heat network are analyzed. Thirdly, an optimal dispatching model of IEHS with multiple functional areas considering heat network flow regulation is established to minimize the operation cost of IEHS with multiple functional areas while considering the penalty cost of RES abandonment and time-of-use electricity price. Finally, a certain region in China is taken as a case study to verify the effectiveness of the proposed optimal dispatching model. The case study shows that the quality regulation mode of the heat network considering flow change in multiple stages can effectively reduce RES abandonment by 2.4%, purchased electricity by 5.4%, and the system operation cost by 1.7%. In addition, compared with the independent dispatching of each functional area, the joint dispatching of IEHS with multiple functional areas can reduce the amount of RES abandonment by 95.2% and purchased electricity by 66.5%, and lower the operation cost of IEHS by 23.6%.

Coordinated economic dispatch of the primary and secondary heating systems considering the boiler’s supplemental heating

“…In addition, the prerequisite for ensuring the quality and safety of heat supply is the stability of the operation, so the operation optimization and control strategy of the heating systems need to be studied. Wu et al (2021) proposed a method which uses quality regulation for heating systems. A method that varies the flow rate by means of a pump with a frequency converter according to the outdoor temperature is proposed (Kuosa, et al, 2013).…”

A tri‐level approach for coordinated transmission and distribution system expansion planning considering deployment of energy hubs

“…In ref. [40], the optimal operation of an integrated electrical-heating system has been discussed, taking into account the dynamic characteristics of the heating network and multiple functional areas. The proposed method aimed to minimize the total operation cost of the integrated system taking into account a penalty cost for the abandonment of renewable resources.…”

“…These studies have focused only on the operational constraints and ignored the planning of different sectors. Next, [34][35][36][37][38][39][40][41][42] have studied the optimal operation of integrated electrical and heating DSs. These references neither considered the coordination between the TS and DSs nor the planning constraints.…”

Fractional Order Modeling of Thermal Circuits for an Integrated Energy System Based on Natural Transformation

“…There is no need to keep the heat source and heat load equal in the dynamic modeling of the heating network at all times. The dynamic characteristics of the heating network can give play to the heat storage characteristics [23]. The dynamic characteristics of heating network consider not only the heat losses but also the transmission delays.…”