CAJ | 학술논문

配电静止同步补偿器在配电网中能有效的解决电压跌落等动态电压质量问题.针对dq0坐标系下DSTATCOM系统数学模型强耦合、非线性的特点,提出一种模糊比例积分(PI)控制和最优跟踪控制相结合的DSTATCOM电压控制策略.在该控制策略中,电压外环采用模糊自适应PI控制,克服了传统固定增益PI调节器参数难以整定、自适应性差的缺陷.电压外环的输出作为电流内环的指令信号.电流内环采用基于最优跟踪控制的多变量控制器设计方法,避免了有功/无功电流的耦合作用给控制器设计带来的困难.仿真和实验结果表明,所提的DSTATCOM电压控制策略性能优良、结构简单、容易实现,满足DSTATCOM电压控制的要求.
배전정지동보보상기재배전망중능유효적해결전압질락등동태전압질량문제.침대dq0좌표계하DSTATCOM계통수학모형강우합、비선성적특점,제출일충모호비례적분(PI)공제화최우근종공제상결합적DSTATCOM전압공제책략.재해공제책략중,전압외배채용모호자괄응PI공제,극복료전통고정증익PI조절기삼수난이정정、자괄응성차적결함.전압외배적수출작위전류내배적지령신호.전류내배채용기우최우근종공제적다변량공제기설계방법,피면료유공/무공전류적우합작용급공제기설계대래적곤난.방진화실험결과표명,소제적DSTATCOM전압공제책략성능우량、결구간단、용역실현,만족DSTATCOM전압공제적요구.
The distribution static synchronous compensator (DSTATCOM) can be used to solve dynamic voltage quality problems, such as voltage sag.By analyzing coupling and nonlinear characteristics of the mathematic model of DSTATCOM, we proposed a voltage control strategy based on fuzzy adaptive PI and optimal tracking control In this control strategy, in order to solve the difficulties in adjusting the parameters of traditional PI controller and to improve the adaptive performance of the controller, the fuzzy adaptive PI controller was used in the outer loop volt-age control.The output of the outer loop voltage controller was fed to the inner loop current controller as its refer-ence value.The multi-variable control method based on optimal tracking control was adopted in the inner loop cur-rent control which could avoid the coupling influence between the active and reactive current.The digital simulation and experimental results indicate that the proposed control strategy has the merits of excellent performance and easy to use.