CAJ | 학술논문

将基于预测模型的功率控制策略(Predictive power control，PPC)应用于静止同步补偿器(Static synchronous compensator，STATCOM)中，来解决传统直接功率控制策略中存在的功率脉动过大、开关频率不固定等问题。在分析STATCOM基本结构的基础上，结合实际数字处理系统离散运行的特点，推导出STATCOM系统的功率预测方程，构建一个使k+1采样点功率跟踪误差最小为目标的占空比求取函数，然后利用SVPWM技术调制出波形控制(Voltage source inverter，VSI)，以达到系统的稳定运行。最后，使用Matlab搭建了STATCOM系统仿真模型，仿真结果表明所提PPC策略有效地抑制了系统的功率脉动、恒定系统的开关频率，同时其保留了传统DPC策略高动态响应的优异特性。
장기우예측모형적공솔공제책략(Predictive power control，PPC)응용우정지동보보상기(Static synchronous compensator，STATCOM)중，래해결전통직접공솔공제책략중존재적공솔맥동과대、개관빈솔불고정등문제。재분석STATCOM기본결구적기출상，결합실제수자처리계통리산운행적특점，추도출STATCOM계통적공솔예측방정，구건일개사k+1채양점공솔근종오차최소위목표적점공비구취함수，연후이용SVPWM기술조제출파형공제(Voltage source inverter，VSI)，이체도계통적은정운행。최후，사용Matlab탑건료STATCOM계통방진모형，방진결과표명소제PPC책략유효지억제료계통적공솔맥동、항정계통적개관빈솔，동시기보류료전통DPC책략고동태향응적우이특성。
A predictive power control method based on predictive models (PPC) is used in static synchronous compensator (STATCOM) to solve the larger power ripple and inconstant switching frequency in traditional direct power control (DPC). First of all, this paper analyzes the basic structure of STATCOM. Considering the actual discreteness of digital processing system, the power predictive function of STATCOM is derived, and a duty ratio calculating function is constructed to minimize the power tracking error atk+1 sampling time, in order to achieve stable operation of the system, SVPWM technology modulate waveform is used to control VSI. Finally, the simulation model of STATCOM is carried out based on Matlab, the results of simulation show that the proposed PPC method can suppress the power ripple effectively and get a constant switching frequency, as well as keep a high dynamic response performance of traditional DPC.