為因應在電力自由化環境下不斷增加的電力交易及／或區域性發展所造成的負載增量，輸電系統承載能力（System Loadability, SL）的提升刻不容緩，而減少建造更多新輸電線路的較佳選擇則是在輸電網路中安裝彈性交流輸電系統（Flexible AC Transmission Systems, FACTS）裝置。將FACTS裝置安裝在適當位置並具備充分容量，能增強系統動態性能及可靠度，除了能大量提升系統輸電承載能力外，也可降低系統之操作成本。本文提出一靜態乏補償器（Static VAR Compensator, SVC）最佳化安裝之數學模式，以粒子群集最佳化（Particle Swann Optimization, PSG）演算法為基礎進行求解，在PSG演算法中的每粒子（Particle）都包含一組擬安裝SVC之候選虛功率供應量，而在演算中則使用連續電力潮流（Continuation Power Flow, CPF）程序計算每粒子的輸電SL。

To accommodate increasing power transactions in deregulation environment and/or load increases due to regional economic development, improvement of transmission system loadability (SL) is becoming urgent. Installation of Flexible AC Transmission Systems (FACTS) can be a better choice instead of building more new transmission lines. Installing FACTS devices on suitable positions with sufficient capacities can enhance system dynamic ability and reliability, and SL can also be largely improved and system operation cost be reduced as well. This paper proposes an optimal method for installation of Static VAR Compensator (SVC) devices. The problem is solved based on the particle swarm optimization (PSO) algorithm with each particle consisting of a set of candidate reactive power supplies for the SVC installations, and, in the solution process, the SL for each particle will be computed using the continuation power flow (CPF) process.