AINT-12C工控模块机器人备件
应用程序功能块
除了标准软件功能外，还可为应用程序提供各种通用功能块。这些都是经过测试的应用程序，如输入/输出扩展、特定监控功能等。电力系统稳定器（PSS）的目的是通过使用励磁来抑制负载振荡，从而提高发电机和输电系统的整体稳定性。PSS通过影响电压调节器的输入来运行–对于静态励磁系统非常有效，但对于具有旋转励磁机的系统也非常有效。ABB提供三种不同类型的电力系统稳定器：符合IEEE的PSS对于符合IEEE-PSS2A的稳定器，固定参数通过可调超前/滞后滤波器实现最佳阻尼。为了确定这些参数，ABB拥有考虑发电机和励磁系统数据以及变压器和网络电抗的计算软件。
自适应电力系统稳定器（APSS）
自适应电力系统稳定器使用可变参数工作，这些参数通过连续计算电力系统的工作点和当前状态来设置。对于UNITROL 5000，不需要额外的硬件——与UNITROL P系统相反。多频带电力系统稳定器（MBPSS）MBPSS具有三个单独可调的工作频带，以确保在通常为0.05…4.0 Hz的整个频率范围内有效工作，而不是单个超前/滞后滤波器。这三个频段被设计用于抑制低频、中频和高频的机电振荡。旋转二极管监测此外，无刷系统中使用的旋转整流器的支路中的短路或开路可在大范围的转速范围内检测到。软件监控功能根据励磁电流信号计算励磁机频率的谐波。根据与励磁电流相关的振幅，可以区分支路中的短路和开路。图3：几个UNITROL 5000功率转换器之间的电流均衡
Application function block
In addition to standard software functions, it can also provide various common function blocks for applications. These are tested applications such as I/O extensions, specific monitoring functions, etc. The purpose of power system stabilizer (PSS) is to restrain load oscillation by using excitation, so as to improve the overall stability of generator and transmission system. The PSS operates by affecting the input of the voltage regulator – very effective for static excitation systems, but also for systems with rotating exciters. ABB provides three different types of power system stabilizers: IEEE compliant PSS. For IEEE-PSS2A compliant stabilizers, fixed parameters are optimized by adjustable lead/lag filters. In order to determine these parameters, ABB has calculation software that takes into account generator and excitation system data as well as transformer and network reactance.
Adaptive Power System Stabilizer (APSS)
The adaptive power system stabilizer works with variable parameters, which are set by continuously calculating the working point and current state of the power system. For the UNITROL 5000, no additional hardware is required - as opposed to the UNITROL P system. Multiband Power System Stabilizer (MBPSS) MBPSS has three independently adjustable operating bands to ensure effective operation in the entire frequency range, usually 0.05... 4.0 Hz, rather than a single lead/lag filter. These three bands are designed to suppress electromechanical oscillations at low, medium and high frequencies. Rotating diode monitoring In addition, the short circuit or open circuit in the branch circuit of the rotating rectifier used in the brushless system can be detected in a wide range of speed ranges. The software monitoring function calculates the harmonic of exciter frequency according to the excitation current signal. The short circuit and open circuit in the branch can be distinguished according to the amplitude related to the excitation current. Figure 3: Current balance between several UNITROL 5000 power converters
