AGC在水电厂运行中的优化和应用研究

发布时间：2018-03-14 04:50

本文选题：自动发电控制　切入点：有功功率　出处：《广西大学》2014年硕士论文　论文类型：学位论文

【摘要】：现今绿色能源理念不断发展,当代大型水力发电厂输出系统的负荷比例不断增加。随着电网规模的壮大,电网结构及功率潮流日趋复杂,仅仅依靠传统模式下现场运行人员局部、分散、人工控制手动调节机组出力以满足系统负荷潮流方式已无法适应日新月异的电网发展,因此建设自动发电控制(AGC)系统实现全程对可控机组出力控制成为迫切的需要。本文通过分析机组调节较小负荷时,由于平均分配原则导致的单机调节范围落入“死区”现象,引入“小负荷分配”原则来解决上述问题。通过测量单机水头、负荷、振摆度情况,分析并绘制单机和全厂联合振动区,指导监控系统AGC合理分配各台机组有功负荷,达到降低机组振动摆度的目标。对AGC程序进一步优化,设置安全闭锁功能来闭锁AGC功能界面中的部分控制方式的切换顺序,达到从程序上防止误操作的可能性,以实现AGC的安全运行。最后,在对采用了优化AGC程序后的龙滩水电站各项运行指标进行对比分析,发现机组的振动摆度得到明显降低,机组运行工况得到进一步优化。在相同全厂总负荷时,优化后的AGC程序可以有效降低全厂耗水量,给企业带来显著的经济效益和良好社会效益,大量水资源得到了节省和优化,实现绿色环保能源的目标。
[Abstract]:With the development of the concept of green energy, the load ratio of the output system of large hydropower plants is increasing. With the expansion of power grid, the structure of power grid and power flow are becoming more and more complex. Only relying on the traditional mode of local, decentralized, manual control of manual control unit output to meet the system load and power flow mode has been unable to adapt to the rapid development of the power grid. Therefore, it is urgent to construct automatic generation control system (AGCC) to control the output of controllable units in the whole process. By analyzing the phenomenon that the adjustment range of single machine falls into "dead zone" caused by the principle of average distribution, this paper introduces the principle of "small load distribution" to solve the above problem. This paper analyzes and draws the joint vibration zone of single machine and the whole plant, instructs the monitoring system AGC to distribute the active power load of each unit reasonably, and achieves the goal of reducing the vibration swing of the unit. The AGC program is further optimized. The security locking function is set to switch the order of partial control mode in the AGC function interface, so as to prevent the misoperation from the program, so as to realize the safe operation of AGC. Finally, by comparing and analyzing the operation indexes of Longtan Hydropower Station after adopting the optimized AGC program, it is found that the vibration swing of the unit is obviously reduced, and the operating conditions of the unit are further optimized. When the total load of the same plant is the same, The optimized AGC program can effectively reduce the water consumption of the plant, bring remarkable economic benefits and good social benefits to the enterprise, save and optimize a large number of water resources, and realize the goal of green environmental protection energy.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV736

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