In the application of the voltage quality control (VQC) technology, many practical issues need to investigate and resolve.
电压无功自动控制(VQC)技术在应用中有不少具体问题需研究解决。
Fuzzy control tests of arc voltage and short-circuit frequency are conducted to improve welding quality.
采用模糊控制技术，实现了电弧电压或短路频率的控制，提高了焊接质量。
The accurate measurement of welding current and voltage is very important to the exact control of resistance spot welding inverter and welding quality.
焊接电流与电压的准确测量对精密控制逆变电阻点焊电源和保证焊接质量至关重要。
The voltage and reactive power control system for substations can improve voltage quality and reduce the active power loss.
变电站电压无功控制系统可提高电压的质量和降低电网的有功损耗。
The voltage and inactive power control of substations have become necessary measures to ensure the voltage quality and inactive power balance and improve the reliability and economy of power system.
变电站电压、无功控制已成为保证电压质量和无功平衡，提高电力系统可靠性和经济性必不可少的措施。
The voltage and reactive power control system can improve voltage quality and reduce the active power loss.
电压无功控制系统对于提高电压质量，降低电网的有功损耗有着重要的意义。
In order to make more effective control of universal power quality controllers (UPQC), an outer loop model for the voltage loop in a three-phase three-wire UPQC is proposed in the paper.
为了对通用电能质量控制器直流侧电压进行更为有效的控制，提出一种用于三相三线通用电能质量控制器(UPQC)直流侧电压控制的外环模型。
After the partition results being achieved, a secondary control strategy of the OLTCs is implemented depending on the voltage quality and energy loss reduction in the period of specified interval.
在优化分段的基础上，根据各控制时段内不同时刻的网损及电压质量，再决定是否用OLTC进行二次调节。
Adopting this criterion, the switching times of loaded taps can be efficiently decreased and the voltage quality improved, while the var control times and var compensation effect keep unchanged.
采用该判据，可以在保持无功调节次数和无功补偿效果不变的情况下，有效地减少有载分接开关的调节次数并提高电压质量。
Strict quality control procedure and tests for 100 percent current and voltage ensure the power requirement.
严格的质量监测工序，100%的电流和电压测试，确保组件符合功率要求。
The experimental results of proposed power quality control system in restraining harmonic voltage and of its synchronous operation with a power system are presented.
通过电能质量控制系统与电网间同步运行试验和谐波电压抑制试验，实现了逆变器与电网的同步运行控制以及负载谐波抑制控制。
In this paper, the means of harmonics control by selecting switching angles are analyzed for improving quality of output voltage in cascaded multilevel inverter.
为改善级联型多电平逆变器输出电压波形质量，对通过控制逆变单元开关角实现级联多电平逆变器谐波控制的方法进行了分析研究。
The control mode reduced the loss of network and gave attention to the quality of voltage at the same time.
其控制减少了网络损耗，同时也兼顾了电压的质量。
The voltage regulation action of controlled reactor in distribution network is introduced. It can effectively control the variety of network voltage and improve the quality of power supply.
介绍了可控电抗器在配电网中的调压作用，它可以有效抑制电网电压的波动，改善供电质量。
Steady output voltage and current, high quality welding, advanced control technology, wide current scope.
输出电压和电流稳定，焊接质量高，控制技术先进，电流调节范围宽。
A DC voltage outer loop control for power balance and PI correction and an ac current inner loop control for feedback are designed to ensure the current quality and stabilize the DC voltage.
通过直流电压外环的功率平衡控制及比例积分校正，配合内环并网电流反馈控制，使并网逆变器在保持并网电流质量的同时更好地控制直流电压。
The cut-off frequency of improved inverter output filter can be set higher to ensure the bandwidth of control system and improve the waveform quality of inverter output voltage.
改进后逆变器输出滤波器的截止频率可以取较高值，保证足够的控制系统带宽，有效提高逆变器输出电压波形质量。
The invention relates to a voltage fluctuation and flicker generation device, which belongs to the power quality control technology field.
一种电压波动和闪变发生装置，属于电能质量控制技术领域。
Some research work of voltage reactive power optimization control of region network has been done in order to improve the voltage quality and decrease the power loss;
为了提高电压质量，降低电能损耗，本论文针对我国地区电网的状况和特点，对电网电压无功优化控制进行了深入的探索和研究；
Due to the importance of voltage quality in power systems, the control of voltage and reactive power becomes more and more attractive.
由于电压在整个电网中的重要性，电压无功控制越来越引起注意。
Optimizing reactive power and voltage control in power system is an important and efficient method to improve the voltage quality and ensure the voltage stability.
无功电压优化控制是减少电网损耗、保持电压稳定性、提高电力系统安全性和经济性的有效措施。
Besides, in order to eliminate the effect of grid voltage distortion or disturbance on output current, decoupling control is employed to further improve the quality of output current.
此外，为了消除电网电压畸变或扰动对逆变器输出电流的影响，系统中引入了电网电压前馈解耦控制，改善了系统输出电流的质量。
Under the control of the quality guarantee system of ISO9001:2000, the products of low-voltage assemblies switchgear have passed through the attestation of "3C" by China Quality Attestation Center.
产品在完善的ISO9001：2000质量保证体系中受控，生产的低压成套开关设备均通过中国质量认证中心首批“3C”认证；
Under the control of the quality guarantee system of ISO9001:2000, the products of low-voltage assemblies switchgear have passed through the attestation of "3C" by China Quality Attestation Center.
产品在完善的ISO9001：2000质量保证体系中受控，生产的低压成套开关设备均通过中国质量认证中心首批“3C”认证；
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