补汽阀投切对机组一次调频功率响应影响分析  

Analysis of the Impact of Cut-in/Cut-out of Overload Valve on the Power Response of Primary Frequency Regulation

作　　者：金宏伟 鲍文龙 谢昊旻 朱善会 JIN Hong-wei;BAO Wen-long;XIE Hao-min(Zhejiang Zheneng Taizhou No.2 Electric Power Generation Co.,Ltd;E.Energy Technology Co.,Ltd.)

机构地区：[1]浙江浙能台州第二发电厂有限责任公司,浙江台州317108 [2]杭州意能电力技术有限公司

出　　处：《电站系统工程》2024年第6期47-50,共4页Power System Engineering

摘　　要：补汽阀技术能够有效提高机组灵活性,但对于设置补汽阀的机组,在投用过程中也存在着引起汽流激振、节流损失降低机组效率等问题,部分机组为了限制补汽阀开启将其阀限设置为-5%,但该做法容易引起积分饱和现象,严重影响机组功率控制。针对该问题,修改了控制逻辑,在控制系统中将补汽阀切除,有效解决了积分饱和的现象。讨论补汽阀切除后对机组一次调频功率响应的影响,通过仿真分析得到补汽阀切除后前馈系数仅为原系数的0.8倍,降低了一次调频功率支撑能力。提出了针对补汽阀切除前后设置不同流量特性函数或不同前馈系数模块,解决补汽阀投切对一次调频功率响应特性的影响。The technology of overload valve can effectively improve the flexibility of the unit,but there are also problems in the process of using the unit with overload valve,such as steam flow excitation,throttling loss,and reduced unit efficiency.In order to limit the opening of the overload valve,some units set the valve limit to-5%,but this approach can easily lead to integral saturation,which seriously affects the power control of the unit.To address this issue,the manufacturer modified the control logic,removing the overload valve from the control system,effectively solving the problem of integral saturation.The impact of removing the overload valve on the unit's primary frequency modulation power response is discussed.Through simulation analysis,it is found that the feedforward coefficient after removing the steam injection valve is only 0.8 times the original coefficient,reducing the primary frequency modulation power support capability.The setting different flow characteristic functions or different feedforward coefficient modules before and after the removal of the overload valve is proposed to address the impact of the switching of the overload valve on the primary frequency modulation power response characteristics.

关 键 词：补汽阀 切除 一次调频 前馈 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]