Abstract
The Regional Integrated Energy System (RIES) has brought new modes of development, utilization, conversion, storage of energy. The introduction of Soft Open Point (SOP) and the application of Power to Gas (P2G) technology will greatly deepen the coupling of the electricity-gas integrated energy system, improve the flexibility and safety of the operation of the power system, and bring a deal of benefits to the power system. On this background, an optimal dispatch model of RIES combined cold, heat, gas and electricity with SOP is proposed. Firstly, RIES architecture with SOP and P2G is designed and its mathematical model also is built. Secondly, on the basis of considering the optimal scheduling of combined cold, heat, gas and electricity, the optimal scheduling model for RIES was established. After that, the original model is transformed into a mixed-integer second-order cone programming model by using linearization and second-order cone relaxation techniques, and the CPLEX solver is invoked to solve the optimization problem. Finally, the modified IEEE 33-bus system is used to analyze the benefits of SOP, P2G technology and lithium bromide absorption chillers in reducing system network loss and cost, as well as improving the system’s ability to absorb wind and solar and operating safety.
Highlights
Entering the first year of the “14th Five-Year Plan”, “carbon peak” and “carbon neutral” have been written in the Chinese national government report
5) Analysis of power network line loss: It can be seen from Table 1 that after Soft Open Point (SOP), P2G and lithium bromide absorption chiller (LBAC) are added in turn, the total operating cost of the system is reduced from RMB 15,345.05 to RMB 15,234.15, RMB 11,509.71 and RMB 10,787.27 in turn, and the cost is reduced by 0.72%, 24.99% and 29.70%, respectively
An optimal dispatch method of Regional Integrated Energy System (RIES) combined cold, heat, gas and electricity with SOP and P2G is proposed. It aims at minimizing the sum of RIES operation cost and system power network line loss cost, SOP, P2G, and the combined cooling technology of electric refrigerator (ER) and LBAC are introduced to optimize RIES multi-energy coupling operation
Summary
Entering the first year of the “14th Five-Year Plan”, “carbon peak” and “carbon neutral” have been written in the Chinese national government report. As shown in [13–16], integrated demand response (IDR) is considered for the energy flow interaction and coordination optimization scheduling of RIES’s multi-energy loads, the detailed IDR model containing various energy supplies is established It makes the comprehensive utilization rate of system equipment and various energy sources enhanced, the quality, flexibility and economy of RIES’s operating status improved, and plays a positive role in local consumption of RCE while optimizing the allocation of various energy sources. The power to gas (P2G) technology and the new type of power electronic device named soft open point (SOP) which have emerged and developed rapidly in recent years have provided a new solution to promote of RCE consumption, reduce RIES’s high operating costs and the loss of the power system It can promote the system voltage level and maintain the internal power system in a safe and stable operation state. Through a series of optimized comparative analysis based on quantitative analysis indicators, the effectiveness of the proposed scheduling model in increasing the efficiency of multi-energy coupling utilization and improving the economic operation of the system is verified
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