本文为美国阿肯色大学费耶特维尔分校（作者：Vinson Jones）的学士论文，共138页。

本论文的目的是提出一种解决三相四线制系统不平衡电流负载的方法，包括理论、设计、构建及测试。不平衡电流静态补偿器是本原型的名称，这里称为UCSC。这个原型的目的是在配电系统的三相之间重新分配电流。通过这种再分配，消除了负序和零序电流，并在安装点的上游实现了一个平衡的系统。UCSC由三个独立的单相H桥逆变器组成，它们共享相同的直流链电容。每个逆变器使用单相旋转坐标系控制器独立运行。每一个都将电流引入或注入配电系统线路，以平衡有功电流，并对电压补偿进行功率因数校正。建立了一个34.5kV、6MVA系统，并在Matlab/Simulink中进行仿真以测试此解决方案的有效性。然后设计并建造了一个缩小的UCSC原型，以补偿208V、10kVA系统。给出并分析了样机的仿真和测试结果。

The objective of this thesis is to present the theory, design, construction, and testing of a proposed solution to unbalanced current loading on three-phase four-wire systems. The Unbalanced Current Static Compensator is the name of the prototype; herein referred to as the UCSC. The purpose of this prototype is to redistribute current between the three phases of a distribution system. Through this redistribution, negative- and zero-sequence currents are eliminated and a balanced system is seen upstream from the point of installation. The UCSC consists of three separate single-phase H-bridge inverters that all share the same dc-link capacitor. Each of these inverters performs independently using a single-phase rotating reference frame controller. Each either draws or injects current onto the distribution system lines to balance the active currents and performs power factor correction for voltage compensation. A 34.5 kV, 6 MVA system was built and simulated in Matlab/Simulink™ to test the validity of this solution. A scaled-down UCSC prototype was then designed and constructed to compensate for a 208 V, 10 kVA system. Results from both the simulations and testing of this UCSC prototype are presented and analyzed.

1.       引言

2. UCSC工作理论

3. 过程仿真与结果

4. 缩减版UCSC原型设计

5. 控制算法在单片机中的实现

6. UCSC原型测试

7. 结论与展望

附录A 用于半导体器件的阻尼装置

附录B 数字信号处理器代码

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