Modeling PV for unbalanced, dynamic and quasistatic distribution system analysis
Modeling PV for unbalanced, dynamic and quasistatic distribution system analysis
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光伏建模用于不平衡、动态和准静态配电系统分析
DOI：
10.1109/pes.2011.6039835
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Mcdermott
中科院分区：
文献类型：
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作者：
T. Mcdermott
北美典型的多接地中性配电馈线具有不平衡负载和电压控制组件。它们专为径向过流保护而设计，假设公用变电站只有一个电源。馈线上的可变电源（例如分布式光伏单元）可能与馈线上的抽头变换器和开关电容器组相互作用。分布式光伏的电流注入可能会影响过流设备协调、公用设施设备的接地故障检测，并可能在接地故障期间产生过电压。仿真模型必须是不平衡的，通常使用相位坐标而不是对称组件。它还必须在动态模式下运行以进行短路计算（通常以 1 周期时间步长），并在准静态模式下运行以进行电压控制仿真（通常以 1 秒时间步长）。这些功能有时称为“不平衡 RMS 模拟”。 PV 模型需要包含适当的详细程度，同时保护技术供应商的专有信息。为了实现这一目标，光伏单元的 Simulink 瞬态模型已连接到名为 OpenDSS 的开源不平衡 RMS 模拟器。
Multi-grounded neutral distribution feeders, which are typical in North America, have unbalanced loads and voltage control components. They have been designed for radial overcurrent protection, assuming only one source at the utility substation. Variable power sources on the feeder, such as distributed PV units, may interact with tap changers and switched capacitor banks on the feeder. Current injections from distributed PV can affect overcurrent device coordination, ground fault detection by utility devices, and possibly create overvoltages during ground faults. The simulation model has to be unbalanced, typically using phase coordinates rather than symmetrical components. It also has to operate in dynamic mode for short circuit calculations, typically at 1-cycle time steps, and in quasistatic mode for voltage control simulation, typically at 1-second time steps. These features are sometimes called “unbalanced RMS simulation”. The PV model needs to include an appropriate level of detail, while protecting the technology vendor's proprietary information. To achieve this goal, a Simulink transient model of the PV unit has been interfaced to an open-source unbalanced RMS simulator called OpenDSS.