SVG 无功补偿 静止无功发生器 无功补偿柜 高低压无功补偿

无功补偿的意义   
随着区域电网互联的发展和负荷用电密度的增加，最大限度的发挥输电线路的设计容量和提高系统的运行稳定性的问题就日益突出。要解决该问题，首先要考虑系统的电压分布的情况,电力系统中的电压分布的情况和系统中的无功潮流分布的关系十分的密切。因此，为了要调整系统的电压分布，必须要调整系统中的无功潮流的分布。
    在电力系统中，任何的用电装置以及输配电设备都要占用一定的无功功率。这时无功电流的存在使得线路的总电流加大，所以相对的增大了输配电线路的有功损耗，从而造成了电压下降、电能浪费，进一步恶化了电力系统电能质量。无功补偿技术即是为了解决上述问题而提出的一种有效手段。
    With the developing of area grid and increasing of loads, the problems of max using line-design capacity and improving system stability are more critical. To solve the problem it should be considered every bus voltage condition in the system first of all, while the voltage states have a close relation with the reactive power flow in the power system. Therefore to adjust the voltage of a grid, the reactive power flow must be adjusted.
    In power systems, any load device or transmission/distribution equipment occupies certain reactive power, which causes the reactive current that increases the line current. It makes the more active power consumption of transmission line, and brings about voltage drop, energy waste and taking to the worse for power quality further. The reactive power compensation technology is an effective method to solve the problems above.

静止无功发生器(SVG)简介 Introduction of SVG

    静止无功发生器是FACTS设备的主要成员，它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 Main Function

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.

技术参数

代号	单位	名称	信元瑞	信元瑞	信元瑞
i	A	额定电流	100	300	1500
	mm	柜体尺寸	800*800*2200	1000*1000*2200	3*800*800*2200
f	Hz	系统频率	50/60	50/60	50/60
udc	v	直流电压	800	800	1200
dP	W	损耗功率	3000	6800	38000
tc	ms	跟踪速度	3	3	3
THD		补偿效果	5%	5%	5%
		接线形式	星形	星形	角形
		主控制器	双CPU	双CPU	双CPU
		采样精度	1%	1%	1%
		启动方式	自恢复型	自恢复型	人工启动
	Kg	产品重量	550	650	950

    选型说明

NEWANGLE可用于三相系统，有380V,660V,1140V,3000V,10KV五档电压等级。
NEWANGLE的标准规格为25A，50A,100A,150A,300A,450A,600A,900A,1500A,2500A（标准型号外特殊电压、电流规
格请与信元瑞技术人员联系）。无功补偿柜可以多台并柜使用，但是建议最多可并列使用台数不超过10台。
信元瑞公司的NEWANGLE可与其它各类补偿柜配合使用。
NEWANGLE可用于三相三线系统和三相四线系统，有380V,660V,1140V,3000V,10KV五档电压等级，其详细选型信息请
参见信元瑞公司的NEWANGLE型录样本。

产品选型PRODUCTION SELECTION

● NEWANGLE主机，落地式机柜                                    
   NEWANGLE main, floor type
● CT，电流互感器，3只，型号需根据现场实际确定                 
   CT, 3 current transformers, the type is made by fact scene.
● NSEQQA，选配，电能质量分析软件，用于需要远程监测的场合      
   NSEQQA, matched, power quality analysis package, used in remote monitor scene.
● NSC-M/C，选配，监控系统中心接入机，用于需要远程监测的场合   
   NSC-M/C, matched, monitor center switch device, used in remote monitor scene.
● IBM兼容机，选配，系统监测主机，用于需要远程监测的场合       
   IBM computer, matched, master, used in remote monitor scene.

无功补偿容量计算

1.系统无功补偿容量由下式决定:
              Q=βav×PC×(tanφ1-tanφ2)
式中：
              Q       --无功补偿容量（kVar）
              PC      --配电所供电的月最大有功计算负载（kW）；
              βav    --月平均负载率，一般可取0.7-0.8；
              φ1     --补偿前的功率因数角，cosφ1可取最大负载时的值；
              φ2     --补偿后的功率因数角，参照电力部门的要求确定，一般可取0.9-0.98；
例如：
某变电所月最大有功负载为2000kW，平均负载率为0.75，补偿前功率因数为0.6，目标功率因数为0.92，该变电所需要补偿的无功功率为：
              Q = βav × PC × (tanφ1 - tanφ2)
                 = 0.75 × 2000 × (tan(arccos0.6)-tan(arccos0.92))
                 = 1361(kVar)
考虑一定的裕量，可选择补偿容量为1500kVar的无功补偿装置。
2.无功补偿容量的选择
NEWANGLE无功补偿装置的容量选择原则： 根据上面公式计算出无功补偿容量，对照
NEWANGLE样本型录上的标准规格，按就近原则选取。

联控设计Joint Control Design

    联控设计Joint Control Design改变了所有应用上的传统数据：输出功率、直流电压、启动方式、控制算法，进而提高了补偿效果。而这些改变远非一般性的技术改良可以比拟。卓越的产品设计带来了显而易见的运行可靠性，同时降低了维护成本。
    Joint Control Design changes all the applied traditional data: output power，DC voltage,start-up fashion,control methods,further to inprove THD. And these changes are not the traditional design. The superior design brings the very good working and at the same time reduce the maintenance cost.

NEWANGLE产品优势（一）

NEWANGLE与静止无功补偿SVC相比，存在很多优势，主要表现在：
NEWANGLE has many advantages comparing to SVC,its main performances are:
响应更加迅速，可完全替代原来的低压无功补偿设备；
More fast,the device can completely replace the original low-voltage reactive power compensation equipment.
电压变抑制更强
More ability to suppresses to voltage flickering.
“有源设备”，运行范围更宽
“Actire power”,More wide operation range.
能够在一定范围内提供有功功率
Provide active power.
抑制特定次谐波的能力强
Restrain certain harmonic.
电磁噪声显著降低
Lower electromagnetism noise.
设备占地面积显著减少
Less occupation area.
功率损耗低，节电效果显著
Less power loss, more energy saving.
能够解决三相不平衡问题（三相三线制产品）
The device can solve the problem of unbalance in three-phase three-line.
在设备补偿范围内可将功率因数提高到近似于1.0；能够“吞吐”无功功率，实时连续补偿，不合产生过补或者补偿不足问题；
The device can improve power factor to 1.0 within compensation ability. The device can output or absorb reactive power to gain real-time continuous compensation, will not cause excessive or inadequate compensation.

NEWANGLE产品优势（二）

为更有效的提高电能质量，NEWANGLE静止同步无功补偿装置已成为补偿无功功率、改善电能质量的有力工具。该技术的核心器件IPM模块，比GTO元件具有更快的开关频率，并且关断容量已达到一定规模，因此NEWANGLE装置具有更快的响应特性。
   对于稳态时的电压质量问题有许多成熟的措施加以解决；但对于动态电能质量问题，依靠传统的无功补偿和常规的滤波装置则不能有效地解决，因为诸如电压跌落（sage）、浪涌（surge）、电压脉冲（impulse）与瞬时供电中断（outage）这类电能质量问题持续的时间很短、变化很快，并且有的电能质量问题还伴随着部分甚至全部的有功损失等情形。
    NEWANGLE静止同步无功补偿装置在SVC装置的基础上，克服了SVC产品由于呈恒阻抗特性，使得在电压低时，无法提供所需的无功支持，应付突发事件的能力较弱；而且占地面积大，过多的SVC易引发系统振荡等弊端，NEWANGLE的无功电流输出可以很大电压变化范围内恒定，在电压低时仍能提供较强的无功支撑，并且可从感性到容性全范围内连续调节，使得其无功输出相当于同容量SVC的1.4—2倍；因NEWANGLE的灵活调压，还可以大大减少变压器分接头的切换次数，从而减少分接头故障次数。另外，NEWANGLE还可以抑制电压闪变，提高系统暂态稳定水平，结合我国的国情和已有的技术，发展静止同步无功补偿技术应是解决我国电压稳定问题的有效手段，并且也是FACTS技术发展的主要方向。
    To more effectively improve the power quality, NEWANGLE SVG has become a powerful tool for reactive power compensation to improve the power quality. The core components of the IPM module technology have faster switching frequency than the GTO components, and its turn-off capacity has reached a certain size, so NEWANGLE device has a faster response.
    For the steady state voltage quality problems, many mature measures to solve them, but the dynamic power quality problems,the traditional and conventional reactive power compensateon device can not effectively filter solution, because the voltage drop, such as sags,surge,voltage pulse and the instanteous power interruption (outage), and these kinds of power quality problems persist for a short time, changing rapidly, and some power quality problems still associated with some or all of the active power losses circumstances.
Based on the SVC, NEWANGLE has overcome the permanent impedance characteristic which causes that SVC is unable support var output,which provides weak ability to deal with thunderbolt in low voltage. Moreover the SVC area is big, excessively many SVC easy to initiate system vibration, the NEWANGLE’s var current may output in a very great voltage range of variation constant and could provide the strong work support in low voltage, and is with a scope adjust continuously. So its var output equals to co-content SVC 1.4—2 times. Because of NEWANGLE can adjust voltage, it may also reduce the operation number of transformer tapping greatly, which reduces tapping breakdown number, Moreover, NEWANGLE can suppress the voltage flickering, raise the system transition condition stable level, unified our country’s condition and the existing technology, which is national technology direction.

NEWANGLE产品优势（三）

接线方便、最简方式、最短距离、任意拓扑、任意点接入
完全无振荡，与其它厂商不同之处在于可以应用于各种环境中
电压不受限制，从低压到高压
补偿电流范围宽，单机最大补偿电流2500A
配置简单，所有控制及保护运行方式均可在就地面板上设置，使用人员只需简单的培训即可轻松操作