Dynamic load flow technology can simulate actual frequency and load flow change when a load naturally varies and generator units adjust their power output by an adjustment system during a certain time. Dynamic load fl...Dynamic load flow technology can simulate actual frequency and load flow change when a load naturally varies and generator units adjust their power output by an adjustment system during a certain time. Dynamic load flow is a basic part of power system state and tendency analysis. In this paper, a dynamic load flow model and its solution method are first presented and discussed. Then, the application of dynamic load flow to a real power system is given as a demonstration.展开更多
远程终端单元(remote terminal unit, RTU)是当前电网中最主要的测量终端,但是其量测量没有统一时标,更新频率低,而且存在不确定性的传输时延。而同步相量测量单元(phasor measurement unit, PMU)具有高同步、高精度等特点,成为电力系...远程终端单元(remote terminal unit, RTU)是当前电网中最主要的测量终端,但是其量测量没有统一时标,更新频率低,而且存在不确定性的传输时延。而同步相量测量单元(phasor measurement unit, PMU)具有高同步、高精度等特点,成为电力系统中重要的数据采集装置。为协调利用这两种测量数据,首先归纳出RTU量测非同步的来源,分析了量测数据不同步对状态估计和潮流计算的影响,并给出了相关的验证结果。并提出基于能量交互算子的量测数据相关性分析方法。该方法应用同步数据间相关性最大的原理,利用PMU所产生的精确数据来同步RTU数据,为混合测量系统确定测量基准时刻。通过对IEEE39节点电网和广东83节点实际电网的仿真,结果表明该方法能有效校正量测数据非同步以及改善状态估计和潮流计算精度。展开更多
文摘Dynamic load flow technology can simulate actual frequency and load flow change when a load naturally varies and generator units adjust their power output by an adjustment system during a certain time. Dynamic load flow is a basic part of power system state and tendency analysis. In this paper, a dynamic load flow model and its solution method are first presented and discussed. Then, the application of dynamic load flow to a real power system is given as a demonstration.
文摘远程终端单元(remote terminal unit, RTU)是当前电网中最主要的测量终端,但是其量测量没有统一时标,更新频率低,而且存在不确定性的传输时延。而同步相量测量单元(phasor measurement unit, PMU)具有高同步、高精度等特点,成为电力系统中重要的数据采集装置。为协调利用这两种测量数据,首先归纳出RTU量测非同步的来源,分析了量测数据不同步对状态估计和潮流计算的影响,并给出了相关的验证结果。并提出基于能量交互算子的量测数据相关性分析方法。该方法应用同步数据间相关性最大的原理,利用PMU所产生的精确数据来同步RTU数据,为混合测量系统确定测量基准时刻。通过对IEEE39节点电网和广东83节点实际电网的仿真,结果表明该方法能有效校正量测数据非同步以及改善状态估计和潮流计算精度。
