分析了注入式混合型有源电力滤波器(injection type hybrid active power filter,IHAPF)的结构和工作原理,着重讨论了其主电路的参数优化设计;提出了一种无源滤波器的设计方法,既满足谐波治理要求又可确保装置的可靠运行;提出了基于粒...分析了注入式混合型有源电力滤波器(injection type hybrid active power filter,IHAPF)的结构和工作原理,着重讨论了其主电路的参数优化设计;提出了一种无源滤波器的设计方法,既满足谐波治理要求又可确保装置的可靠运行;提出了基于粒子群算法的注入支路参数优化设计方法,在确保IHAPF谐波抑制能力的同时降低了电网谐波电压对装置可靠性的影响。针对某企业整流装置导致无功不足和谐波污染的实际工况,研制了一套IHAPF,仿真分析和工程应用表明,该IHAPF可以有效地进行谐波治理和无功补偿,满足了该企业的要求。展开更多
无源电力滤波器(Passive Power Filter,PPF)以其高性价比在电力系统中得到了广泛的应用。用不同阻抗频率特性的PPF拓扑支路组成无源滤波网络是目前无源滤波的通用方法,实际中PPF支路拓扑设计通常依靠设计者的工程经验,缺少系统的设计方...无源电力滤波器(Passive Power Filter,PPF)以其高性价比在电力系统中得到了广泛的应用。用不同阻抗频率特性的PPF拓扑支路组成无源滤波网络是目前无源滤波的通用方法,实际中PPF支路拓扑设计通常依靠设计者的工程经验,缺少系统的设计方法,更谈不上对支路拓扑的优化设计。本研究提出了一种基于粒子群优化算法(Particle Swarm Optimization,PSO)的PPF支路拓扑的优化设计方法,解决了工程设计中单纯依靠工程经验设计PPF支路拓扑的盲目性问题。本方法首先基于PSO优化了各种滤波支路中补偿容量的分配,然后以总投资成本、单调谐滤波支路平均品质因数及电流谐波平均含有率为目标函数优化出最佳PPF滤波支路网络。并以一个实际的工况为例,验证了优化设计效果。展开更多
A novel control strategy for three-phase shunt active power filter (SAPF) was proposed to improve its performance under non-ideal mains voltages. The approach was inspired by our finding that the classic instantaneous...A novel control strategy for three-phase shunt active power filter (SAPF) was proposed to improve its performance under non-ideal mains voltages. The approach was inspired by our finding that the classic instantaneous reactive power theory based algorithm was unsatisfactory in terms of isolating positive sequence fundamental active components exactly under non-ideal mains voltages. So, a modified ip-iq reference current calculation method was presented. With usage of the new method, not only the positive sequence but also the fundamental active current components can be accurately isolated from load current. A deadbeat closed-loop control model is built in order to eliminate both delay error and tracking error between reference voltages and compensation voltages under unbalanced and distorted mains voltages. Computer simulation results show that the proposed strategy is effective with better tracking ability and lower total harmonic distortion (THD). The strategy is also applied to a 10 kV substation with a local electrolysis manganese plant injecting a large amount of harmonics into the power system, and is proved to be more practical and efficient.展开更多
Due to development of distribution systems and increase in electricity demand,the use of capacitor banks increases.From the other point of view,nonlinear loads generate and inject considerable harmonic currents into p...Due to development of distribution systems and increase in electricity demand,the use of capacitor banks increases.From the other point of view,nonlinear loads generate and inject considerable harmonic currents into power system.Under this condition if capacitor banks are not properly selected and placed in the power system,they could amplify and propagate these harmonics and deteriorate power quality to unacceptable levels.With attention of disadvantages of passive filters,such as occurring resonance,nowadays the usage of this type of harmonic compensator is restricted.On the other side,one of parallel multi-function compensating devices which are recently used in distribution system to mitigate voltage sag and harmonic distortion,performs power factor correction,and improves the overall power quality as active power conditioner(APC).Therefore,the utilization of APC in harmonic distorted system can affect and change the optimal location and size of shunt capacitor bank under harmonic distortion condition.This paper presents an optimization algorithm for improvement of power quality using simultaneous optimal placement and sizing of APC and shunt capacitor banks in radial distribution networks in the presence of voltage and current harmonics.The algorithm is based on particle swarm optimization(PSO).The objective function includes the cost of power losses,energy losses and those of the capacitor banks and APCs.展开更多
文摘分析了注入式混合型有源电力滤波器(injection type hybrid active power filter,IHAPF)的结构和工作原理,着重讨论了其主电路的参数优化设计;提出了一种无源滤波器的设计方法,既满足谐波治理要求又可确保装置的可靠运行;提出了基于粒子群算法的注入支路参数优化设计方法,在确保IHAPF谐波抑制能力的同时降低了电网谐波电压对装置可靠性的影响。针对某企业整流装置导致无功不足和谐波污染的实际工况,研制了一套IHAPF,仿真分析和工程应用表明,该IHAPF可以有效地进行谐波治理和无功补偿,满足了该企业的要求。
文摘无源电力滤波器(Passive Power Filter,PPF)以其高性价比在电力系统中得到了广泛的应用。用不同阻抗频率特性的PPF拓扑支路组成无源滤波网络是目前无源滤波的通用方法,实际中PPF支路拓扑设计通常依靠设计者的工程经验,缺少系统的设计方法,更谈不上对支路拓扑的优化设计。本研究提出了一种基于粒子群优化算法(Particle Swarm Optimization,PSO)的PPF支路拓扑的优化设计方法,解决了工程设计中单纯依靠工程经验设计PPF支路拓扑的盲目性问题。本方法首先基于PSO优化了各种滤波支路中补偿容量的分配,然后以总投资成本、单调谐滤波支路平均品质因数及电流谐波平均含有率为目标函数优化出最佳PPF滤波支路网络。并以一个实际的工况为例,验证了优化设计效果。
基金Project(JC200903180555A) supported by Shenzhen City Science and Technology Plan, China
文摘A novel control strategy for three-phase shunt active power filter (SAPF) was proposed to improve its performance under non-ideal mains voltages. The approach was inspired by our finding that the classic instantaneous reactive power theory based algorithm was unsatisfactory in terms of isolating positive sequence fundamental active components exactly under non-ideal mains voltages. So, a modified ip-iq reference current calculation method was presented. With usage of the new method, not only the positive sequence but also the fundamental active current components can be accurately isolated from load current. A deadbeat closed-loop control model is built in order to eliminate both delay error and tracking error between reference voltages and compensation voltages under unbalanced and distorted mains voltages. Computer simulation results show that the proposed strategy is effective with better tracking ability and lower total harmonic distortion (THD). The strategy is also applied to a 10 kV substation with a local electrolysis manganese plant injecting a large amount of harmonics into the power system, and is proved to be more practical and efficient.
文摘Due to development of distribution systems and increase in electricity demand,the use of capacitor banks increases.From the other point of view,nonlinear loads generate and inject considerable harmonic currents into power system.Under this condition if capacitor banks are not properly selected and placed in the power system,they could amplify and propagate these harmonics and deteriorate power quality to unacceptable levels.With attention of disadvantages of passive filters,such as occurring resonance,nowadays the usage of this type of harmonic compensator is restricted.On the other side,one of parallel multi-function compensating devices which are recently used in distribution system to mitigate voltage sag and harmonic distortion,performs power factor correction,and improves the overall power quality as active power conditioner(APC).Therefore,the utilization of APC in harmonic distorted system can affect and change the optimal location and size of shunt capacitor bank under harmonic distortion condition.This paper presents an optimization algorithm for improvement of power quality using simultaneous optimal placement and sizing of APC and shunt capacitor banks in radial distribution networks in the presence of voltage and current harmonics.The algorithm is based on particle swarm optimization(PSO).The objective function includes the cost of power losses,energy losses and those of the capacitor banks and APCs.