In a word, reactive power compensation and harmonic current restrain have become one of the most important problems.
总之，无功功率的补偿和谐波电流的抑制已经成为港口电气系统设计中最重要的问题之一。
When reactive power is unbalance, it will cause some problems, such as lower voltage, worsen voltage quality, lower power factor and increase line loss.
当无功功率不平衡时，将会导致系统电压降低、电能质量下降、功率因数降低、线损增加等问题。
Aiming at the problems existing in present voltage and reactive power control device of substation, puts forward a reactive power control project.
针对现有变电站电压、无功控制装置存在的问题，提出了一种电压无功控制方案。
The principle of reactive power compensation is described, combined with examples of reactive power compensation, problems and solutions of reactive power compensation are discussed.
简述无功补偿的原理，并结合无功补偿实例，探讨无功补偿常遇到的问题和解决办法。
Large single hook lift system in mine has problems in reactive power loss, and energy waste during decentralization.
叙述了矿井单钩提升系统大马拉小车、无功损耗大、下放段能量白白浪费的问题。
The system based on DSP is proposed to solve the problems of voltage and reactive power integrated control in a substation.
针对现有变电站电压无功控制系统存在的问题，提出了一种应用DSP控制器实现电压无功综合控制的方案。
It produces serial power quality problems such as reactive power excessive, negative exceeding, containing high harmonic.
由此产生诸如无功成分多、负序突出、谐波含量高等一系列电能质量问题。
This paper discusses such problems as how much the decreasing capacity rate is after reactive power compensation and how much the incremental capacity of power users is.
实行电容补偿无功，补偿无功后的节容率是多少?电力用户可增容又是多少?。
D-STATCOM has been paid more and more attention since it can stabilize the voltage of the common coupling point and compensate the reactive power. But there are still many problems to be resolved.
配电网静止同步补偿器(D- STATCOM)能稳定接入点电压、补偿负载所缺无功，受到越来越广泛的重视，但存在很多技术问题有待解决。
D-STATCOM has been paid more and more attention since it can stabilize the voltage of the common coupling point and compensate the reactive power. But there are still many problems to be resolved.
配电网静止同步补偿器(D- STATCOM)能稳定接入点电压、补偿负载所缺无功，受到越来越广泛的重视，但存在很多技术问题有待解决。
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