Optimal economic dispatch of combined cooling, heating and power‐type multi‐microgrids considering interaction power among microgrids

Abstract

With the rapid growth of microgrids, many regional multi-microgrids systems emerge gradually with microgrids being integrated to the certain distribution network. By connecting each microgrid using cables and coordinating interaction power among microgrids, the total operation cost of multi-microgrids system can be decreased. On the basis of modeling a variety of energy supply and storage devices, this paper proposes an energy supply infrastructure for combined cooling, heating and power (CCHP) microgrid on centralized and interconnected energy exchange network, and energy loads are subdivided into cooling load, thermal load and power load. Then the optimal economic dispatch model considering interaction power among microgrids is proposed in this study for CCHP type multi-microgrids, and energy balance constraints are established according to load types. This model not only takes into account the power interaction between microgrid and the distribution network, but also considers the power interaction among microgrids. The objective is the minimal total operation cost of CCHP type multimicrogrids system. In case studies of Sino-Singapore district, Tianjin, China, the output power of pre-defined equipment and the total operation cost are compared under two different operation mode, coordination mode and independence mode, which verifies the effectiveness and economy of the proposed model.

Optimal Operation of Integrated Energy System Based on Exergy Analysis and Adaptive Genetic Algorithm

“…Wang et al [11] proposed a joint-operation model by flexibly scheduling various energy units to satisfy electric and thermal load demands. Xu et al [12] further modelled the interaction power among multiple IESs and established the optimal energy management model for small-scale IESs. Similarly, for small-scale IESs, Jadidbonab et al [13] evaluated the potential operation risk with the conditional value at risk theory and formulated a stochastic risk-constrained economic dispatch model.…”

Coordinated Dispatch of Multi-Energy Microgrids and Distribution Network with a Flexible Structure

“…The controlled variables of the reconfiguration of the DN are shown in Equation 21, SW represents the set that controls the open/closed state of the switch on each branch, "0" represents the switch is open while "1" represents the switch is closed, the inequality constraint of SW is shown in Equation (15). Φ represents the set that controls power interaction between the MGs and the DN.…”

“…Much effort has been focused on the optimal dispatch of the MGs [11][12][13][14][15][16][17][18][19][20]. Wang Chengshan proposes a general modeling method using an energy bus to describe the injection of different forms of energy in [12].…”

“…[14]. Li Lin proposes an economic dispatch method of CCHP-based multi-microgrids considering the power interaction [15]. Liu N proposes an energy sharing strategy, which let CHP units to break the limit of working modes [16].…”

“…Optimal dispatch of MGs. MGs purchase or sell power to DN and buy natural gas from the gas network without consideration of the DN[15].• Case Optimal dispatch of MGs and operation of DN (considering power loss) without consideration of the DN reconfiguration [29]. • Case The method proposed in this paper.…”