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首页> 外文期刊>Power Systems, IEEE Transactions on >PLC-Based Model of Reactive Power Flow in Steam Power Plant for Pre-Commissioning Validation Testing of Coordinated Q-V Controller
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PLC-Based Model of Reactive Power Flow in Steam Power Plant for Pre-Commissioning Validation Testing of Coordinated Q-V Controller

机译：基于PLC的蒸汽电厂无功潮流模型用于协调Q-V控制器的调试前检验试验。

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摘要

The paper presents the digital realization of a model of reactive power flow (QFM) in a steam power plant using a programmable logic controller (PLC). The steam power plant (SPP) model is developed for pre-commissioning validation testing of the coordinated reactive power-terminal voltage (Q-V) control system. The SPP QFM includes a model for a synchronous generator, an excitation system, a step-up transformer, and the generator's droop characteristic modeled through the automatic voltage regulator (AVR). A QFM synthesis is based on a series of experiments performed on site. The parameters of the generator and AVR are estimated from recorded generator voltage and current time responses to a step change in voltage reference of the AVR. To get a complete QFM, transformers and network reactances are also included. In order to calculate reactive power (Q) flows more accurately, the generator Q output is adjusted by taking into account its real power output. Standard PLC hardware, as industrial grade equipment appropriate for on site testing, is used for practical QFM implementation after discretization of the continuous mathematical model. The developed QFM response is verified through a series of experiments performed in the laboratory.
机译：本文介绍了使用可编程逻辑控制器（PLC）在蒸汽发电厂中无功潮流（QFM）模型的数字实现。蒸汽电厂（SPP）模型是为协调的无功-终端电压（Q-V）控制系统的调试前验证测试而开发的。 SPP QFM包括用于同步发电机，励磁系统，升压变压器的模型，以及通过自动电压调节器（AVR）建模的发电机的下垂特性。 QFM合成基于现场进行的一系列实验。发电机和AVR的参数是根据记录的发电机电压和AVR电压参考的阶跃变化的电流时间响应估算的。为了获得完整的QFM，还包括变压器和网络电抗。为了更准确地计算无功功率（Q）流量，请考虑发电机的有功功率来调整发电机Q的输出。在离散化连续数学模型之后，将标准PLC硬件作为适合现场测试的工业级设备，用于实际QFM实施。通过实验室中进行的一系列实验验证了已开发的QFM响应。

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