大惯性城市热网参与火电机组调峰创新应用研究

Innovative Application of Large Inertia Urban District Heating Network Participating in Peak Regulation of Thermal Power Units

研究了城市热网储能特性对火电机组调峰能力的影响,利用电网峰谷特性,开展了被动性的热网储热和放热特性研究。结果表明:利用热网在用电高峰期储存热量,并在用电低谷期释放热量,可以减少对供热抽汽量的需求,从而降低机组的主汽质量流量,使电负荷降低,通过移峰填谷的方式进一步实现热电解耦;所提出的利用城市热网大惯性特点进行大规模储热,进而调节火电机组灵活性的方法在国内是创新性的应用实践,为热电联产机组热电解耦提供了新的思路。

The impact of urban heating network energy storage characteristics on the peak-shaving capabilities of thermal power units was studied.The passive heat storage and release characteristics of the heating network were explored by utilizing the peak and valley characteristics of the power grid.Results show that storing heat during peak electricity consumption periods by using the heating network and releasing heat during low electricity consumption periods can reduce the demand for heating extraction steam,thereby reducing the main steam mass flow rate of the unit and lowering the electrical load.By shifting the peak and filling the valley,thermal electric decoupling can be further achieved.The proposed method of utilizing the large inertia characteristics of urban heating networks for large-scale heat storage can further enhance the flexibility of thermal power units,which is an innovative practice in China,providing a new idea for the thermal electric decoupling of cogeneration units.