An active distribution system power-supply planning model considering cooling,heating and power load balance is proposed in this paper.A regional energy service company is assumed to be in charge of the investment and...An active distribution system power-supply planning model considering cooling,heating and power load balance is proposed in this paper.A regional energy service company is assumed to be in charge of the investment and operation for the system in the model.The expansion of substations,building up distributed combined cooling,heating and power(CCHP),gas heating boiler(GHB)and air conditioner(AC)are included as investment planning options.In terms of operation,the load scenarios are divided into heating,cooling and transition periods.Also,the extreme load scene is included to assure the power supply reliability of the system.Numerical results demonstrate the effectiveness of the proposed model and illustrate the economic benefits of applying distributed CCHP in regional power supply on investment and operation.展开更多
针对单相牵引负荷波动性大,随机性强,造成大量谐波、无功及负序分量的特点,提出一种应用于电气化铁路的单相无功动态补偿与谐波治理混合系统(hybrid var and harmonic dynamic compensator,HVHC)。系统由混合型有源电力滤波器(hybrid ac...针对单相牵引负荷波动性大,随机性强,造成大量谐波、无功及负序分量的特点,提出一种应用于电气化铁路的单相无功动态补偿与谐波治理混合系统(hybrid var and harmonic dynamic compensator,HVHC)。系统由混合型有源电力滤波器(hybrid active power filter,HAPF)及静止无功补偿器(static var compensator,SVC)组成,其中SVC包括晶闸管投切电容器(thyristor switched capacitor,TSC)和晶闸管控制电抗器(thyristor controlled reactor,TCR),用来动态连续补偿无功功率,HAPF用来动态抑制电网及无功补偿装置产生的谐波,电力机车产生的负序分量可通过在平衡变压器接线方式下控制2个牵引供电臂的负载来消除。提出HAPF和SVC复合控制策略及分频控制方法,可有效地消除两者之间的耦合,提高单相系统谐波及无功电流的跟踪精度,克服电网电压畸变对系统的影响。仿真及实验结果证明该系统响应速度快,抗干扰能力强,治理效果满足要求。展开更多
有源电力滤波器APF(active power filter)是补偿电力系统谐波及无功功率的重要装置,其控制的实时性和准确性是实现有效补偿的一个关键,就目前所研究的几种有代表性的单相APF方法进行了一一分析,阐述了它们的原理,并指出了它们的缺点和...有源电力滤波器APF(active power filter)是补偿电力系统谐波及无功功率的重要装置,其控制的实时性和准确性是实现有效补偿的一个关键,就目前所研究的几种有代表性的单相APF方法进行了一一分析,阐述了它们的原理,并指出了它们的缺点和优点。其中逆变器输出电压恒定控制,单周控制,基于有功能量平衡原理的并联型有源滤波器由于能够保持逆变器输出端电压恒定,并且电流畸变率(THDi)能保持在5%以下,因而具有广阔的发展前景,就最后一种方法在Matlab7.0中进行了仿真,仿真结果表明,此种方法实现的APF具有很好的谐波补偿效果。展开更多
基金This project is supported by National High Technology Research and Development Program of China(863 Program)(No.2014AA051902).
文摘An active distribution system power-supply planning model considering cooling,heating and power load balance is proposed in this paper.A regional energy service company is assumed to be in charge of the investment and operation for the system in the model.The expansion of substations,building up distributed combined cooling,heating and power(CCHP),gas heating boiler(GHB)and air conditioner(AC)are included as investment planning options.In terms of operation,the load scenarios are divided into heating,cooling and transition periods.Also,the extreme load scene is included to assure the power supply reliability of the system.Numerical results demonstrate the effectiveness of the proposed model and illustrate the economic benefits of applying distributed CCHP in regional power supply on investment and operation.
文摘针对单相牵引负荷波动性大,随机性强,造成大量谐波、无功及负序分量的特点,提出一种应用于电气化铁路的单相无功动态补偿与谐波治理混合系统(hybrid var and harmonic dynamic compensator,HVHC)。系统由混合型有源电力滤波器(hybrid active power filter,HAPF)及静止无功补偿器(static var compensator,SVC)组成,其中SVC包括晶闸管投切电容器(thyristor switched capacitor,TSC)和晶闸管控制电抗器(thyristor controlled reactor,TCR),用来动态连续补偿无功功率,HAPF用来动态抑制电网及无功补偿装置产生的谐波,电力机车产生的负序分量可通过在平衡变压器接线方式下控制2个牵引供电臂的负载来消除。提出HAPF和SVC复合控制策略及分频控制方法,可有效地消除两者之间的耦合,提高单相系统谐波及无功电流的跟踪精度,克服电网电压畸变对系统的影响。仿真及实验结果证明该系统响应速度快,抗干扰能力强,治理效果满足要求。
文摘有源电力滤波器APF(active power filter)是补偿电力系统谐波及无功功率的重要装置,其控制的实时性和准确性是实现有效补偿的一个关键,就目前所研究的几种有代表性的单相APF方法进行了一一分析,阐述了它们的原理,并指出了它们的缺点和优点。其中逆变器输出电压恒定控制,单周控制,基于有功能量平衡原理的并联型有源滤波器由于能够保持逆变器输出端电压恒定,并且电流畸变率(THDi)能保持在5%以下,因而具有广阔的发展前景,就最后一种方法在Matlab7.0中进行了仿真,仿真结果表明,此种方法实现的APF具有很好的谐波补偿效果。
