ASVG,即
静止无功发生器,是
FACTS设备的主要成员。
工作原理
静止无功发生器以双
数字信号处理器(DSP)为核心,通过电抗器将自换相桥式电路并联在电网上,采用实时数据采集技术和动态跟踪技术,不断监测电网和系统的电压、电流并进行一系列的运算,最后经由以IGBT为核心的变流单元输出补偿到系统或电网,在快速连续的补偿调整系统无功功率的同时,还可以显著地改善负荷与公共电网连接点处的电能质量,提高功率因数、克服三相不平衡、消除电压闪变和电压波动、抑制谐波污染。
SVG (static var generator) is the main member of FACTS devices and its core CPUs are DSP. Adopting real-time data sampling and dynamic tracking technology, through monitoring the voltage and current of the grid, SVG is parallel connected with grid via the bridge-circuit by inductance, and it compensates reactive power of system, improves power quality of system interface and power factor, remove the phase unbalance, voltage flicker and fluctuation and depress harmonic pollution rapidly.
主要功能
1) 动态补偿电网无功功率,暂态响应时间小于1ms;
2) 动态抑制特定次(3,5,7,11次)电流谐波;
3) 可以瞬间提供一定有功功率,补偿电网电压跌落和闪变;
4) 并网后可以自动运行,不需要人员操作;
5) 中文图形液晶显示,人机界面清晰友好;
6) 具有完善的自诊断和监视功能,对故障可具体定位,方便调试;
7) 具有完善的软硬件看门狗,保证装置可靠运行;
8) 具有完善的在线运行状态监视功能;
9) 准确测量并显示系统当前的各个状态量;
1) Dynamic compensating grid reactive power, transient responding time less 1ms;
2) Dynamic damping character harmonic (3rd, 5th, 7th, 11th);
3) Providing instantaneous active power to compensate grid voltage dip and flicker;
4) Automatic running after shunt, without control;
5) Chinese figure crystal display, friendly man-machine interface;
6) Perfect self-diagnosing and monitoring with fault location for convenient debagging;
7) Watchdog keeps device reliable operation;
8) With online operation monitoring function;
9) Precise measurement and display the states of system.
行业状况
SVG技术来自于欧洲的柔性交流电力理念,国内从事SVG产品经营的企业约200家(大部分为贴牌组装企业),真正具有研发和生产能力的企业达20余家,其中技术成熟、系统可靠的品牌不到5家,据国家电网以及中国电力科技研究院的数据显示,在我国能够从硬上和软件上真正达到国际技术和可靠性要求的只有上海交通大学第六工作室(即:信元瑞电气有限公司)研发的NEWANGLE、NEWSINE系列产品,其多项可靠性指标甚至超过了ABB的相应系列产品。