摘要
相比于传统的电磁式电流、电压互感器,电子式电流和电子式电压互感器具有光纤系统绝缘性好、抗干扰能力强、精度高、无磁饱和与铁磁谐振问题等优点。特别在已建或者在建的数字化变电站、智能化变电站中应用比较广泛。本文通过对电子式互感器原理的介绍,得知电子式互感器采集数据时,相位偏差。数字积分器技术较模拟积分器具有绝对的优势,可以补偿相位。基于理论推导和分析梯形积分算法的幅频特性,并用Matlab仿真验证相位补偿效果。最后基于FPGA,实现了梯形算法数字积分器,通过仿真验证,得出本文设计的数字积分器满足IEC 60044-7/8电子式互感器0.2级精度标准,具有一定的实用性。
Compared to the traditional magnetic PT and CT,eleetronic current transformer（ECT） and electronic voltage transformer（EVT） have good insulation about optical fiber systems ,anti-jamming,high precision ,non-magnetic and ferromagnetic resonance saturation problem and so on. Particularly, in digital substation and intelligent substation have been built or under construction, ECT and EVT used widely. Described the principle of ECT and EVT, phase deviation occurred when collecting data. Digital technology integrator comparing analog integrator has the absolute advantage, and could compensate for the phase. Based on theoretical derivation and analysis trapezoidal integration algorithm amplitudefrequency characteristics, simulate the model by Matlab. Finally, based on FPGA, to achieve a trapezoidal algorithm digital integrator,from the resuh of simulation,the design of digital integrator meet IEC 60044-7/8 Electronic Transformer 0. 2 accuracy standards, and has a certain value practicality.
出处
《电气开关》
2016年第6期35-38,共4页
Electric Switchgear
