CAJ | 학술논문

为提高控制系统鲁棒性，提出一种链式静止同步补偿器（distribution static synchronous compensator，D-STATCOM）的鲁棒三2性能准则设计新方法。首先通过等效电路变化，将对链式D-STATCOM的控制电路模型转换为对单个H桥逆变单元的控制电路模型；在所建立的考虑干扰和参数摄动影响的单个H桥逆变单元控制电路模型基础上，通过对误差系统方程的等价变换，将参数摄动的影响转化为周期干扰的一部分；然后利用重复控制与无源性控制相结合的新方法实现链式D—STATCOM的鲁棒上2性能准则的设计。其中，重复控制对周期干扰进行补偿，无源性控制确保重复控制的收敛性和对控制目标的渐近跟踪，并抑制非周期干扰对控制效果的影响；通过给定指令电流，实现链式D．STATCOM的无功电流的控制和直流电压稳定的控制：利用H桥逆变单元之间的能量交换实现直流电压的均衡控制。仿真以及10kV、±5Mvar工程实际应用结果表明，所提方法能够在实现无功电流控制的同时实现直流电压的稳定与均衡控制，且稳态特性好、动态响应快、算法实现简单、鲁棒性强，具有较强的工程实用价值。
위제고공제계통로봉성，제출일충련식정지동보보상기（distribution static synchronous compensator，D-STATCOM）적로봉삼2성능준칙설계신방법。수선통과등효전로변화，장대련식D-STATCOM적공제전로모형전환위대단개H교역변단원적공제전로모형；재소건립적고필간우화삼수섭동영향적단개H교역변단원공제전로모형기출상，통과대오차계통방정적등개변환，장삼수섭동적영향전화위주기간우적일부분；연후이용중복공제여무원성공제상결합적신방법실현련식D—STATCOM적로봉상2성능준칙적설계。기중，중복공제대주기간우진행보상，무원성공제학보중복공제적수렴성화대공제목표적점근근종，병억제비주기간우대공제효과적영향；통과급정지령전류，실현련식D．STATCOM적무공전류적공제화직류전압은정적공제：이용H교역변단원지간적능량교환실현직류전압적균형공제。방진이급10kV、±5Mvar공정실제응용결과표명，소제방법능구재실현무공전류공제적동시실현직류전압적은정여균형공제，차은태특성호、동태향응쾌、산법실현간단、로봉성강，구유교강적공정실용개치。
In order to improve the control robustness, a novel robust L2 performance criteria design for cascade distribution static synchronous compensator （D-STATCOM） with disturbances and parametric perturbations was proposed. This paper built up single Hzbridge module for cascade D-STATCOM by equivalent circuit conversion, and then equivalent transform of error system of single H-bridge module was adopted so that the influence of parametric perturbations could be converted into part of the periodic disturbances. A novel algorithm by combination of repetitive control and passivity-based control was proposed to realize the robust L2 performance criteria design for cascade D-STATCOM. The reactive current and DC voltage stability control was realized by given instruction current. DC voltage balancing control was realized based on the power exchange among H-bridge modules. The validity and feasibility of this control strategy was verified by simulation results, and have been used on practical engineering of ＋5 Mvar, 10 kV D-STATCOM. Simulation and practical engineering application results show that this control strategy can completely realize the reactive current, DC voltage stability and balancing control of cascade D-STATCOM with excellent steady characteristic, fast transient response, easy implementation algorithm, strong robustness as well as important practical engineering value.