基于生物质热电混合供能的城镇综合能源双层优化

生物质发电相当于小型火电,单独发电时效率低,且现有研究对含生物质热电联产机组系统的优化调度关注较少。针对上述问题,提出了适用于城镇综合能源系统的多种新能源高效消纳的综合能源运行双层优化方法。通过补燃设备调整热天然气和生物质电联产机组的运行状态,建立可补燃生物质热电联产运行模型;研究了多个可补燃热电联产机组的联合控制,分别以综合供能费用和能源利用效率作为上下层优化目标,同时对热电联产机组间的能源分配调度和各热电联产机组内部运行状态进行优化,构建包含光伏生物质和天然气在内的区域能量枢纽双层优化模型。算例验证了可补燃的生物质热电混合供能对提高系统能效、降低供能费用的设计目标。

Bi-level Optimization of Urban Integrated Energy System Based on Biomass Combined Heat and Power Supply

Biomass power generation is equivalent to small thermal power, which is inefficient when it is used alone, and little attention has been paid to the optimization scheduling of the biomass thermal power system among the existing literatures. To solve the above problems, the rural integrated energy system is taken as the research object, and a bi-level optimization method of comprehensive energy operation is proposed, which is able to promote a variety of renewable energy consumption efficiently. By supplemental firing equipment, the operation state of combined heat and power(CHP)of thermal gas and biomass is adjusted, and a model of biomass CHP with supplemental firing equipment is established. Focusing on the joint control of multiple CHP units with supplemental firing equipment, with the comprehensive energy supply cost and energy efficiency as the upper and lower optimization objectives respectively, the energy distribution and dispatching between the CHP units and the internal operation status of the CHP units are optimized. And a bi-level optimization model of regional energy hub including photovoltaic, biomass and natural gas is established. The case study proves that the hybrid energy supply of biomass energy can improve the system energy efficiency and reduce the cost of energy supply.