滑压、凝结水控制技术及协调控制系统优化策略
Optimization Strategy of Sliding Pressure, Condensated Water Control and Coordinated Control System
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摘要:
随着我国电力供需矛盾逐渐趋向缓和，发电机组年利用小时数逐年减少，长期处于低负荷运行状态，造成发电机组热经济性不断降低，无法满足国家节能降耗，提高生产率的需求。针对低负荷运行发电机组进行滑压优化，对基于最佳阀点的滑压控制技术优化方案进行研究，并采用加快主汽压力响应及凝结水节流技术的协调控制系统优化策略，不仅提高了发电机组在低负荷状态下的运行效率，也保证了机组在变负荷过程中，能够及时快速响应负荷变化的要求。研究结果表明，基于最佳阀点的滑压控制技术及协调控制系统优化策略能有效提高低负荷运行工况下的机组运行效率及控制品质，可以在国内其它发电机组进行推广应用。 Abstract:As the contradiction between power supply and demand of our country gradually easing, annual utilization hours of generating units decreasing year by year, running in low load condition for a long time, it has been caused the unit thermal economy continue to decrease, unable to meet our country's need for energy saving and improving productivity. This paper concentrated on optimization of sliding pressure for low load operation generating units. The optimization scheme of sliding pressure control technology based on optimum valve-point was studied. The optimization strategy accelerating the response of main steam pressure and the throttling technique of condensed water is adopted in CCS that can not only improve the operation efficiency of the generating unit under low load condition, but also ensure the unit to promptly and rapidly respond the load change requirement during the variable load process. The result of this study shows that the optimization strategy of sliding pressure control technology based on optimum valve-point and the coordinated control system can effectively improve the operation efficiency and control quality of the unit under low load operation condition, and can be popularized and applied in other generating units in china.
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