Studies on Multi-Function System Corresponding to Various Electric Energy Management

1.研制了广域电力系统状态量同步测量系统。该系统分别采用递归DFT算法作为软件和DSP（数字信号处理器）作为硬件。利用GPS（全球定位系统）的时间信号。能够实现电力系统多点同步测量。由于从实验数据确认了相位同步的精度在0.8度内实现。能够真实的实时分析各节点的谐波潮流.为了利用所开发的系统进行基于相量测量的稳定性分析和评估，提出了基于发电机同调的电力系统集结算法。该方法能够对发电机失步进行真实的实时预测.提出了一种串并联功率变换器对负载电压进行幅值控制和不平衡补偿的方法。系列Conv ...更多信息 ETER工作以获得恒定的平衡正弦负载电压。并联转换器调节断开电压，并在转换器的额定电流范围内补偿电源的无功电流。设计串并联功率变换器所需的容量。介绍了在补偿电压恒定的情况下，逆变器容量与负载功率因数的关系。串并联功率变换器的所需容量与传统的串联功率变换器相比减小到小于50%。通过实验验证了该系统的有效性.提出了基于部分参数辨识和基于增益调度的两种鲁棒控制器设计方法。通过数值仿真验证了所设计的PSS（电力系统稳定器）的有效性.统一潮流控制器（UPFC）基于瞬时电流的控制方案。它具有电流控制速度快、控制增益设计简单等特点。提出了输出电压饱和的对策。仿真和实验验证了该算法的有效性。少

1. The synchronized measurement system for state variables in the broad-wide electric power system is developed. The system adopts the recursive DFT algorithm as software and the DSP (Digital Signal Processor) as hardware, respectively. By using the time-signal of GSP (Global Positioning System). it is enable to measure synchronously at multi-points in the power system. Since it was confirmed from experimental data that the accuracy of phase synchronization is realized within 0.8 degree. it was enable to analyze harmonic flow at each node in real time.2. For the purpose of the stability analysis and evaluation based on the phasor measurement by using the developed system, the aggregation algorithm of power system based on the coherency of generators is proposed. By using the proposed method it was enable to predict the step-out of generators in real time.3. The amplitude control and unbalance compensation of load voltage using a series-shunt power converter is proposed. The series conv … More erter works to obtain the constant balanced sinusoidal load voltage. The shunt converter regulates the de link voltage and compensates for the reactive current of the source within the rated current of the converter. To design the required capacity of the series-shunt power converter. relations between on converter capacity and the load power factor under the constant compensation voltage are introduced. The required capacity of the series-shunt power converter is reduced to less than 50% compared with that of the conventional series power converter. The effectiveness of the proposed system was verified by experiments.4. The two kind of robust control design methods are proposed based on the partial parameter identification and the gain-scheduling. The effectiveness of designed PSS (Power System Stabilizer)s were verified by some numerical simulations.5. The instantaneous current-based control scheme of the UPFC (Unified Power Flow Controller). It has features of high-speed current control and simple design of control gains. The countermeasure of output voltage saturation is proposed. Simulations and experiments verified the effectiveness of the proposed algorithm. Less