| 引用本文: | 许胜,赵剑锋,唐国庆.基于CPS-SPWM级联型DSTATCOM直流侧稳态分析及电容容量设计[J].电力自动化设备,2009,(6): |
| .DC-side steady-state model of cascaded DSTATCOM based on CPS-SPWM and its capacitance design[J].Electric Power Automation Equipment,2009,(6): |
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| 摘要: |
| 基于四象限双H桥变流器级联型的主电路结构以及CPS-SPWM的调制策略,在建立SPWM-H桥变流器数学模型的基础上,详细分析了对应于三相不对称畸变补偿电流分量(无功、负序及谐波电流)时DSTATCOM各级联功率单元H桥逆变器直流侧电流变化规律,以及基于单位功率因数的H桥整流器直流侧电流变化规律,并据此建立了功率单元直流侧各电流数学模型.结论显示,稳态条件下,直流整流侧电流包含2次交流分量和直流分量irdc-.而直流逆变侧电流不仅包含与无功和负序补偿电流分量对应的2次交流分量,以及等于irdc-对应于整流器与逆变器之间有功功率传递的直流分量,还包含与谐波补偿分量对应的4,6,…偶次交流分量.最后,根据所建立的直流侧电容电压、电流数学模型,结合电容电压控制的稳态和动态性能指标要求,给出了直流电容容量的设计方法.仿真结果表明,基于该主电路拓扑及电容参数设计方法的DSTATCOM,其直流电压稳定、均衡控制简单可靠、动态响应速度快,对非线性、不平衡冲击性负荷的补偿效果较好. |
| 关键词: 直流侧数学模型 电容设计 稳态 |
| DOI： |
| 分类号:TM711 |
| 基金项目:国家科技支撑计划重点项目? |
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| DC-side steady-state model of cascaded DSTATCOM based on CPS-SPWM and its capacitance design |
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XU Sheng ZHAO Jianfeng TANG Guoqing
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| Abstract: |
| Based on the main circuit topology of four-quadrant double H-bridge cascaded converters and the CPS-SPWM modulation strategy,as well as the established mathematic model of SPWM H-bridge inverter,the DC - side current variable rule of H - bridge inverter in DSTATCOM cascaded power unit is analyzed corresponding to the compensation current components for three - phase asymmetric distortion,including reactive,negative sequence and harmonic currents,as well as that of H - bridge rectifier based on unit power fa... |
| Key words: DSTATCOM CPS-SPWM |
