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公开(公告)号：US4001670A
公开(公告)日：1977-01-04
申请号：US575888
申请日：1975-05-08
申请人： Laszlo Gyugyi , John Rosa , Eric J. Stacey
发明人： Laszlo Gyugyi , John Rosa , Eric J. Stacey
CPC分类号： H02J3/1857 , H02M5/271 , Y02E40/26
摘要： An AC/AC frequency changer operating under a one to one frequency ratio has its input coupled to a power system of same frequency and voltage, with an inductor connected between its output and input terminals. The output voltage is controlled so as to deviate by a predetermined amount from the input voltage so that reactive power flows from the output to the input which, owing to the inherent phase inversion in the frequency changer, causes reactive input current and reactive output current to be summed up directly at the input terminals. As a result, the frequency changer requires only a power rating which is half the reactive power which it can supply to the power system.
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2.发明授权Phase displaced, multiple inverter bridge circuits with waveform notching for harmonic elimination 失效相位偏移，具有波形开槽的多个逆变桥式电路，用于谐波消除
公开(公告)号：US5168437A
公开(公告)日：1992-12-01
申请号：US612647
申请日：1990-11-13
申请人： Laszlo Gyugyi , Eric J. Stacey
发明人： Laszlo Gyugyi , Eric J. Stacey
CPC分类号： H02M7/49
摘要： An apparatus and method for reducing certain harmonics in the output of static inverters. Static inverters which employ a switching device arranged in a bridge circuit to convert direct current power to alternating current power produce undesired harmonics in the output of the inverter. Harmonic neutralization techniques are further improved by the invention utilizing selective notching of the inverter pole voltage and a coordinate phase shift between the set of pole voltages produced by the individual inverters. The notch angles in the individual pole voltage outputs are chosen to minimize or eliminate specific undesired harmonics.
摘要翻译： 一种用于减少静态逆变器输出中的某些谐波的装置和方法。 采用布置在桥式电路中以将直流电转换为交流电力的开关装置的静态逆变器在逆变器的输出端产生不需要的谐波。 利用本发明利用反相器极电压的选择性切换和由各个逆变器产生的极电压组之间的坐标相移来进一步改进谐波中和技术。 选择单个极电压输出中的陷波角以最小化或消除特定的不需要的谐波。
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3.发明授权Apparatus and method for transient free energization and deenergization of static VAR generators 失效用于静态VAR发生器的瞬态自由通电和断电的装置和方法
公开(公告)号：US4047097A
公开(公告)日：1977-09-06
申请号：US677202
申请日：1976-04-15
CPC分类号： H02J3/1864 , Y02E40/12
摘要： A static VAR generator is taught for use with a source of electrical power and a rapidly varying load. The static VAR generator comprises thyristor switched inductors connected across a capacitor. The gate of the thyristor switch is fired each half cycle in accordance with a predetermined firing angle to provide sufficient inductive current to cancel a portion of the capacitive current to thus provide a net reactive current for the system served. This is done on a half cycle by half cycle basis. A main disconnect switch is connected in parallel with the series combination of a secondary disconnect switch, a diode and a large resistor. The latter combination is connected in series with the parallel combination of the compensating inductor and the compensating capacitor. The secondary disconnect switch is utilized to charge the capacitor to the peak voltage between lines of the electrical system prior to connecting the static VAR generator to the system or prior to disconnecting the static VAR generator from the system. Prior to a disconnecting or connecting operation an oscillating current is introduced between the compensating capacitor and the compensating inductor. This current is found to have the same frequency phase, wave shape and amplitude as the voltage between the lines to which the static VAR generator is connected. The gate control for the thyristor is utilized to fix the phase difference between the oscillating current and the alternating voltage of the system at or near zero. The oscillating voltage caused by the oscillating current is thus equal in phase, frequency, wave shape and magnitude to the alternating voltage of the system. Consequently the main disconnect switch can be opened or closed as desired with zero electrical potential thereacross.
摘要翻译： 教导静态VAR发生器用于电源和快速变化的负载。 静态VAR发生器包括连接在电容器上的晶闸管开关电感器。 晶闸管开关的栅极根据预定的触发角度每半个周期被烧，以提供足够的感应电流来消除电容电流的一部分，从而为所服务的系统提供净无功电流。 这是以半个周期为基础进行的。 主断路开关与二次断路开关，二极管和大电阻的串联组合并联。 后者的组合与补偿电感器和补偿电容器的并联组合串联连接。 在将静态VAR发生器连接到系统之前或者在将静态VAR发生器从系统断开之前，二次断开开关用于将电容器充电到电气系统的线路之间的峰值电压。 在断开或连接操作之前，在补偿电容器和补偿电感器之间引入振荡电流。 发现该电流具有与静态VAR发生器连接的线路之间的电压相同的频率相位，波形和振幅。 晶闸管的栅极控制用于将系统的振荡电流和交流电压之间的相位差固定在零或接近零。 振荡电流产生的振荡电压在相位，频率，波形和幅度方面与系统的交流电压相等。 因此，主切断开关可根据需要打开或关闭，其中电位为零。
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公开(公告)号：US5047915A
公开(公告)日：1991-09-10
申请号：US543984
申请日：1990-06-26
IPC分类号： H02M5/27
CPC分类号： H02M5/271
摘要： A current fed unrestricted frequency converter (UFC) for supplying power with balanced voltages to a three-phase unbalanced load generates two sets of existence functions for controlling the switching matrices of the UFC to generate positive and negative sequence current components in the load. Existence function generators generating the positive and negative sequence existence functions are phase locked, respectively, to a positive sequence reference signal generated by a clock and a negative sequence reference signal derived by circuits which monitor the negative sequence voltage in the load. Select circuits alternately gate the positive and negative sequence existence functions to the UFC switching matrices in proportion to the detected magnitude of the negative sequence voltage in a sense to drive the negative sequence voltage in the load to zero. A neutral forming transformer eliminates any zero sequence voltage in the load so that all that remains is the positive sequence components of voltage which by definition are balanced.
摘要翻译： 用于向三相不平衡负载提供具有平衡电压的电力的电流馈送无限制变频器（UFC）产生两组存在函数，用于控制UFC的开关矩阵以在负载中产生正序和负序电流分量。 产生正序和负序存在函数的存在函数发生器分别锁相于由监视负载中的负序电压的电路导出的时钟和负序参考信号产生的正序参考信号。 与负序电压的检测幅度成比例的选择电路将正序和负序存在函数交替地切换到UFC开关矩阵，从而将负载中的负序电压驱动为零。 中性成形变压器消除了负载中的任何零序电压，使得保留的所有电压是根据定义平衡的电压的正序分量。
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5.发明授权Converting multiphase power from one frequency to another using current waveforms 失效使用当前波形将多相功率从一个频率转换到另一个频率
公开(公告)号：US4439823A
公开(公告)日：1984-03-27
申请号：US338777
申请日：1982-01-11
申请人： Laszlo Gyugyi , Geoffrey M. Smith , Eric J. Stacey
发明人： Laszlo Gyugyi , Geoffrey M. Smith , Eric J. Stacey
CPC分类号： H02M5/272
摘要： a multiphase AC current of one frequency is converted to a multiphase current of another frequency by a frequency changer having its output terminals terminated by a load having the impedance characteristics of a voltage source. In this arrangement the multiple phases of a practical AC current source such as a synchronous generator are connected directly to each load phase, even where the bidirectional switches of the UFC are arranged in pulse groups or a bridge configuration.
摘要翻译： 一个频率的多相交流电流被变频器转换为另一个频率的多相电流，变频器的输出端由具有电压源的阻抗特性的负载端接。 在这种布置中，即使在UFC的双向开关以脉冲组或桥式配置布置的情况下，诸如同步发生器的实际交流电流源的多相也直接连接到每个负载相。
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公开(公告)号：US4398141A
公开(公告)日：1983-08-09
申请号：US303299
申请日：1981-09-15
CPC分类号： H02J3/1864 , Y02E40/12
摘要： There is provided by this invention a static VAR generator having an auxiliary shutdown firing pulse generator that initiates a thyristor controlled inductive current to cancel only capacitive current supplied by the static VAR generator in the event of failure of the VAR generator's control means monitoring the capacitive current requirements.
摘要翻译： 本发明提供一种具有辅助关断点火脉冲发生器的静态VAR发生器，其启动晶闸管控制的感应电流，以在VAR发生器的控制装置监测电容电流的故障的情况下仅抵消由静态VAR发生器提供的电容电流 要求。
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公开(公告)号：US4394614A
公开(公告)日：1983-07-19
申请号：US302349
申请日：1981-09-15
CPC分类号： H02J3/1864 , Y02E40/12
摘要： There is provided by this invention a static VAR generator having an auxiliary shutdown firing pulse generator that initiates a thyristor controlled inductive current to cancel any capacitive current supplied by the static VAR generator in the event of failure of the VAR generator's control means monitoring the capacitive current requirements.
摘要翻译： 本发明提供了一种静态VAR发生器，其具有辅助关断点火脉冲发生器，其启动晶闸管控制的感应电流以消除在VAR发生器的控制装置监测电容电流的故障的情况下由静态VAR发生器提供的任何电容电流 要求。
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8.发明授权Apparatus for providing feedback to eliminate a DC component in the output of a static VAR generator 失效提供反馈消除静态发电机输出中直流分量的装置
公开(公告)号：US4001671A
公开(公告)日：1977-01-04
申请号：US535919
申请日：1974-12-23
CPC分类号： H02J3/1864 , G05B2219/35012 , G05B2219/35013 , G05B2219/45228 , Y02E40/12 , Y02P90/265
摘要： Apparatus provided for utilization with the control circuit of a static VAR generator to determine the presence of a DC component in the output of the VAR generator which component is not desirable because it may effect certain AC power components such as transformers. There is provided apparatus for determining the presence of the DC component in the VAR generator which utilizes a feedback loop which includes the VAR generator control system as part thereof to insure that the positive and negative half cycles of the VAR generator output current generally remain equal.
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公开(公告)号：US4210860A
公开(公告)日：1980-07-01
申请号：US942838
申请日：1978-09-15
申请人： John Rosa , Laszlo Gyugyi
发明人： John Rosa , Laszlo Gyugyi
CPC分类号： H02J3/1828 , Y02E40/12 , Y02E40/30
摘要： The static VAR generator of the fixed capacitor switch-controlled inductor type is taught. The inductive element has a break point in its inductive characteristic. That is, below a certain predetermined current, the inductance is one value and above the latter current the inductance is another value. This has the effect of providing a reduced value of inductive reactance above a certain inductive current level thus making it possible to significantly increase the inductive current above its normal range with a small increase of the switch conduction interval. In one case a saturable iron core reactor is utilized to achieve the break point and in another case two inductive elements are provided--one of which is controlled by a switch which places the latter inductor into circuit arrangement with the first at the time that the current exceeds the predetermined value.
摘要翻译： 教授了固定电容开关控制电感器类型的静态VAR发生器。 电感元件的感应特性有断点。 也就是说，低于一定的预定电流时，电感是一个值，高于后一个电流，电感是另一个值。 这具有将感抗降低的值提高到高于某一感应电流水平的效果，从而使得可以以小的开关导通间隔的增加使感应电流显着地增加到其正常范围之上。 在一种情况下，利用可饱和铁芯电抗器来实现断点，并且在另一种情况下，提供两个感应元件，其中一个电感元件由开关控制，该开关将后一电感器放置成电路布置，其中电流为电流 超过预定值。
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公开(公告)号：US4274135A
公开(公告)日：1981-06-16
申请号：US6831
申请日：1979-01-26
申请人： John Rosa , Laszlo Gyugyi
发明人： John Rosa , Laszlo Gyugyi
摘要： Electrical apparatus such as a VAR generator or convertor is taught for high-voltage application. The electrical apparatus includes series stacked silicon controlled rectifiers, some of which operate at high electrical potential. Switching information is provided to the thyristors by way of insulating light pipes. The energy for actuating the gate of the thyristor in each case is provided by a current transformer which in some instances is interconnected with the anode of the thyristor in question to monitor the anode current thereof in a previous half cycle of conduction. In other instances, anode current of another thyristor are monitored. The anode current is converted to stored charge which is later released through a light actuated switch to the gate for energization of the thyristor in question. This means that a thyristor may be repeatedly energized even after many intervals of full cycle conduction where no anode to cathode potential is available for charging a capacitor.
摘要翻译： 电气设备如VAR发生器或转换器被教导用于高电压应用。 电气设备包括串联堆叠的可控硅整流器，其中一些整流器工作在高电位。 开关信息通过绝缘光管提供给晶闸管。 在每种情况下用于致动晶闸管的栅极的能量由电流互感器提供，电流互感器在一些情况下与所讨论的可控硅的阳极互连以在前一个半导体周期中监测其阳极电流。 在其他情况下，监视另一个晶闸管的阳极电流。 阳极电流转换成储存的电荷，后者通过光致动开关释放到栅极，以激励所讨论的晶闸管。 这意味着，即使在许多间隔的全周期导通之后，晶闸管也可以反复通电，其中没有阳极至阴极电位可用于对电容器充电。
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