随着新能源装机容量不断增加，弃风、弃光问题日益突出，成为新能源发展的制约因素之一。针对配电网分布式新能源消纳问题，基于对新能源机组出力和负荷时序变化特性的分析，提出一种包含分布式新能源、电锅炉、燃气锅炉和换热器的热电联供系统；引入弃风弃光惩罚系数，通过考虑能量平衡、弃电量约束、设备及系统运行约束，建立以系统运行成本最小为目标函数的热电联供系统运行优化模型。以IEEE 33系统为例，采用Matlab调用Cplex求解器得到模拟周期内各新能源机组弃电量、电锅炉供热量、燃气锅炉天然气耗量及系统运行成本，并与热电分供情况进行比较。结果表明：在冬季典型日，热电联供系统可利用新能源弃电量承担部分热负荷，从而促进新能源消纳、减少天然气耗量，有效降低系统运行成本。

With the ever-increasing capacity of renewable energy, wind and solar energy curtailment has become prominent, which could limit further development of renewable energy. To solve this problem in distributed networks, the output characteristics of renewable energy and the sequential variation characteristics of load are analyzed. Based on that, a combined heating and power system, which consists of renewable energy, electric boiler, gas boiler and heat exchanger, is presented. As a coefficient is introduced to measure the curtailment of wind and solar energy, the optimal operation model of the combined heating and power system is established with minimizing the system running cost as the objective function, considering energy balance, limits of renewable energy curtailment, output of units and the operation requirement of distributed system. The optimization model based on Matlab calling Cplex solver is applied to case IEEE 33 to obtain the optimal curtailment of renewable energy, electric boiler output, gas consumption and operation cost. And then results are compared with separation supply of heat and power. Results show that in typical winter days combined heating and power system is effective in cutting operation cost by using the wind and solar energy to generate heat, which also promotes the accommodation of renewable energy and contributes to less natural gas consumption.