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Improvement of automatic control systems of high-power turbines of PAO tubroatom for nuclear power plants

机译：核电厂PAO管状原子的大功率涡轮机自动控制系统的改进

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The main technical solutions applied by PAO Turboatom used as the compensatory measures at the increase of the period of nonstop operation of nuclear power plants' (NPP) turbines with VVER-1000 type reactors up to 18 months are (1) replacing the standard hydraulic speed controller with an electronic one, (2) introduction of overclocking protection, (3) modernization of units of stop-control valves of high pressures, (4) installation of locking dampers on the receiver tubes of turbines of the first and second modification, and (5) improving the quality of repairs by reviewing the requirements for their implementation. The introduction of complex diagnostics of a control system on the basis of automatic treatment of results of registration of working parameters of the turbine is allocated as a separate prospective direction. Using an electronic controller of speed makes it possible to simplify the procedure of its inclusion in work at the failure of an electro-hydraulic system of control and vice versa. The regimes of maintaining the turbine rotor speed, steam pressure on the outlet of turbine, and the positions of main servomotors were introduced into the functions of the electronic controller. An electronic controller of speed includes its own electro-hydraulic transducer, turbine rotor speed sensor, and sensors of the position of main servomotors. Into the functions of electro- hydraulic control system and electronic speed controller, the function of overclocking protection, which determines the formation of commands for stopping the turbine at the exceeding of both the defined level of rotation speed and the defined combination of achieved rotation speed and angular acceleration of rotor, was introduced. To simplify the correction of forces acting on the control valve cups, the design of the cups was changed, and it has the profiled inserts. The solutions proposed were implemented on K-1100-60/1500-2M turbines of Rostov NPP. From the composition of control system of already made turbines, the devices of speed switching of moving of control flaps for opening and hydraulic damper in the servomotors of regulating flaps were excluded; the fists of the control valves providing the increased valve stroke for opening and the construction of filters for regulation, electro-hydraulic converters, oil draining device, etc. was changed.
机译：在具有VVER-1000型反应堆的核电站（NPP）涡轮机不间断运行期延长到18个月的情况下，PAO Turboatom所采用的主要技术解决方案是（1）替代标准液压转速带有电子控制器的控制器，（2）引入超频保护，（3）现代化高压停止控制阀的单元，（4）在第一和第二种变型的涡轮机接收管上安装锁止风门，以及（5）通过审查维修要求来提高维修质量。在自动处理涡轮机工作参数记录结果的基础上，引入控制系统的复杂诊断方法是一个单独的预期方向。使用速度电子控制器可以简化在电液控制系统出现故障时将其包含在工作中的过程，反之亦然。维持涡轮转子转速，涡轮出口处的蒸汽压力以及主伺服电动机的位置的机制已被引入电子控制器的功能中。速度电子控制器包括其自己的电液传感器，涡轮转子速度传感器以及主伺服马达位置传感器。在电液压控制系统和电子速度控制器的功能中，具有超频保护功能，该功能确定了在超过定义的转速水平以及实现的转速和转速的组合时停止涡轮机的命令的形成。介绍了转子的角加速度。为了简化作用在控制阀杯上的力的校正，改变了阀杯的设计，并增加了异型插件。提议的解决方案在Rostov NPP的K-1100-60 / 1500-2M涡轮机上实施。从已经制成的涡轮机的控制系统组成中，排除了调节风门伺服电动机中用于打开的控制风门和液压阻尼器的移动速度切换装置；改变了控制阀的拳头，增加了打开阀的行程，并调节了调节器，电动液压转换器，排油装置等。

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