摘要
为消纳电网中大量接入的可再生能源,电网对电源侧的各发电机组灵活性提出了更高的要求。火电机组的控制系统既要满足电网侧调频深度及快速性的要求,又要保证机组在负荷大幅度变化时各项参数维持在一定范围,现有的热工控制策略无法满足当前深度的要求。在燃煤机组进行深度调峰之前,机组AGC、一次调频主要在50%~100%额定功率范围内投入。随着机组负荷的下降,机组各子系统的调节性能由于测点、执行机构、控制策略的影响,造成负荷升降速率、负荷调节精度、一次调频性能,不能满足电网调度的需求。通过现场调研,查看机组运行历史数据,查阅机组各主要设备的说明书及参数,参照相关标准对机组开展深度调峰摸底试验,对燃煤机组现有的热工控制策略进行了深入研究,找出了热工控制系统制约机组深调的各项因素。通过对机组热工控制策略的调整和优化,实现机组30%~100%工况下投入协调控制系统及各子系统自动控制,深调能力显著提升,为机组安全性、稳定性及经济性打下基础。同时获取电网的深调电价补贴,提高机组的盈利能力。
In order to absorb a large amount of renewable energy in the power grid,the power grid puts forward higher requirements for the flexibility of each generator set in the power supply side.The control system of thermal power unit not only needs to meet the requirements of frequency modulation depth and rapidity on the grid side,but also needs to ensure that the parameters of the unit are maintained in a certain range when the load varies greatly.The existing thermal control strategy cannot meet the requirements of current depth.Before the deep peak regulation of coal-fired units,the unit AGC and primary frequency modulation are mainly invested within the rated power range of 50%~100%.With the decrease of the unit load,the adjustment performance of each subsystem of the unit cannot meet the demand of power grid dispatching due to the influence of measuring points,actuator and control strategy.Through field investigation,checking the historical operation data of the unit,consulting the instructions and parameters of the main equipment of the unit,and carrying out the depth peak adjustment and bottom sensing test of the unit with reference to relevant standards,this paper makes an in-depth study on the existing thermal control strategies of coal-fired units,and finds out the factors that restrict the deep control of units.By adjusting and optimizing the thermal control strategy of the unit,the coordinated control system and automatic control of each subsystem are realized under 30%~100%working conditions of the unit,and the deep tuning capability is significantly improved,laying a foundation for the safety,stability and economy of the unit.At the same time,power grid deep adjustment price subsidy is obtained,and the profitability of the unit improved.
作者
张潇
贾庆岩
ZHANG Xiao;JIA Qingyan(Wuhan Branch,China Energy Science and Technology Research Institute Co.,Ltd.,Wuhan Hubei 430077,China;Electric Power Research Institute,State Grid Hubei Electric Power Co.,Ltd.,Wuhan Hubei 430077,China)
出处
《湖北电力》
2022年第5期120-128,共9页
Hubei Electric Power
基金
国家能源集团科学技术研究院有限公司科研项目(项目编号:WH2021Y002)。
关键词
深度调峰
火电机组
热工控制
AGC
可再生能源
deep peak load regulation
thermal power unit
engineering thermodynamics and heat transfer control
AGC
renewable energy
作者简介
张潇(1985),男,湖北襄阳人,本科,工学学士,工程师,主要从事火电厂自动控制技术的研究。
