调峰补偿热电机组及风电消纳能力的优化模型

Optimization Model for CHP Unit with Peak Load Compensation and Wind Power Accommodation Capacity

热电机组"以热定电"运行模式限制了其调峰能力。为了提高调峰能力,电网及风电场将共同提供经济补偿以激励热电厂配置电锅炉进行调峰。本文分析了配置电锅炉后热电机组供热供电运行特性和其对风电消纳空间及系统调峰能力的影响,建立电热平衡约束及热电机组运行约束方程,构造了以最大化消纳风电和热电厂经济效益最优为目标的多目标优化模型并采用非线性规划方法进行求解,实现了兼顾二者的节能调度。仿真结果表明调峰补偿能有效增加热电机组参与调峰的积极性;合适的补偿价格既减少弃风,又提高热电厂经济性和减少碳排放量。

The peak load compensation capacity of combined heat and power （CHP） unit is constrained by the heat- load-based operation mode. To increase the capacity, power grids and wind farms will jointly provide economic compen- sation for CHP plant to encourage them to deploy electric boilers involved in the peak load regulation. Through the anal- ysis of the operation characteristics of CHP units and their influence on both the wind power accommodation and sys- tem＇ s peak load compensation capacity after the configuration of electric boilers, a multi-objective model targeting at maximizing both the wind power accommodation and economic benefit of CHP plant is built and solved by using the non- linear programing method under the constrained equations of both the balance between heat and power and the operation of CHP units, which helps to realize a compatible energy-saving dispatch for both objectives. Simulation results show that the peak load compensation can effectively get more CHP units involved in the peak load regulation; moreover, suitable compensation prices not only reduce the abandoned wind power, but also improve the economic benefit of CHP plant along with the decrease of carbon emissions.