产品概述 Product description
电力系统中非线性负载的大量应用，使系统内产生大量谐波，导致电力系统变得更加复杂，潜在风险升高。PSTN-SVG具有额定容性和额定感性双向补偿、三相不平衡调节、谐波补偿、10ms快速响应、良好的电压支撑等功能，平均无故障时间大于10万小时、补偿容量即为安装容量等优势。
The large number of applications of non-linear loads in power systems creates large amounts of harmonics within the system,resulting in more complex power systems and increased potential risks.PSTN-SVG has the functions of rated capacity and rated inductive bidirectional compensation, three-phase unbalance adjustment,harmonic compensation,10ms fast response,good voltage support,etc.The average time between failures is more than 100,000 hours,and the compensation capacity is the installation capacity.
产品原理 Product principle
PSTN-SVG的基本原理是将自换相桥式电路通过变压器或者电抗器并联在电网上，通过外部互感器实时采集负载电流信号，通过内部检测电路分离出其中的无功需求与谐波电流，适当地调节桥式电路交流输出电压的幅值和相位，进而控制交流侧电流，就可以使该电路吸收或者发出满足要求的无功电流，实现动态无功补偿，提高功率因数、稳定网压、抑制三相不平衡、节能降耗的目的。
PSTN-SVG的输出补偿电流是根据系统的无功需求与谐波含量动态变化的，因此不会出现过补偿，柔性的无功补偿不会产生涌流冲击。PSTN-SVG可自动限制在100%额定容量输出，内部过载保护功能充分保证了设备不会过载运行。
The basic principle of PSTN-SVG is to connect the self-commutated bridge circuit in parallel with the transformer through the transformer or reactor.The load current signal is collected in real time through the external transformer,and the reactive power and harmonic current are separated by the internal detection circuit.Adjusting the amplitude and phase of the AC output voltage of the bridge circuit,and then controlling the current on the AC side,the circuit can absorb or emit the reactive current that meets the requirements,realize dynamic reactive power compensation,improve power factor,stabilize network voltage,and suppress The purpose of three- phase unbalance,energy saving and consumption reduction.
The output compensation current of PSTN-SVG is dynamically changed according to the reactive power requirement and harmonic content of the system,so there is no over-compensation,and flexible reactive compensation does not generate surge current.The PSTN-SVG can be automatically limited to 100%of rated output,and the internal overload protection fully guarantees that the device will not overload.
功能特点 Function features
● 可同时对谐波和无功进行补偿，输出容量从容性到感性连续调节；
● 滤波性能好，可滤除2 ～ 51次谐波电流，滤除率达95%以上；
● 全响应时间小于10ms，可快速跟踪变化速度极快的负载进行补偿；
● 不受电网阻抗影响，避免发生谐振；
● 具有缓冲启动回路，投切平滑无冲击；
● 具有过温、过流、过压、欠压等保护措施，保证装置安全、可靠运行；
● IGBT、控制芯片、电容器均采用国外知名厂商产品，保证变流器工作的稳定性和可靠性；
● 采用模块化技术，体积重量小、安装简单方便、易于扩展；
● 采用高性能嵌入式一体化触摸屏，显示直观、操作便捷；
● 装置自身损耗小于3%；
● 采用通用的远程通信协议，便于远程监控。
● Harmonics and reactive power can be compensated at the same time,and the output capacity is continuously adjusted from capacitive to inductive;
● The filtering performance is good,and the 2~51 harmonic current can be filtered out,and the filtering rate is over 95%;
● The full response time is less than 10ms,which can quickly track the load with extremely fast changing speed to compensate;
● It is not affected by the impedance of the grid and avoids resonance;
● With a buffer start circuit,the switching is smooth and shock-free;
● It has protection measures such as over-temperature,over-current,over- voltage and under-voltage to ensure safe and reliable operation of the device;
● IGBT,control chips,and capacitors are all made by well-known foreign manufacturers to ensure the stability and reliability of the converter operation;
● Modular technology,small size,easy installation and easy expansion;
● The high-performance embedded integrated touch screen provides intuitive display and convenient operation;
● The device itself consumes less than 3%;
● Universal remote communication protocol for remote monitoring.