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    • 2. 发明授权
    • Reactive power compensator with capacitor and capacitor discharge circuit
    • 带电容器和电容放电电路的无功补偿器
    • US4567424A
    • 1986-01-28
    • US576275
    • 1984-02-02
    • Josip DobsaPeter MauchleWalter PfylKadry Sadek
    • Josip DobsaPeter MauchleWalter PfylKadry Sadek
    • H02J3/18
    • H02J3/1864Y02E40/12
    • In a reactive power compensator used for capacitive or inductive reactive powers in alternating-voltage networks, a capacitor is connected to an alternating-voltage network for a short time by means of a thyristor switch. In order to reduce the voltage load on the thyristor switch, a discharge circuit is connected in parallel with the capacitor. Via this circuit, the capacitor can discharge, after being disconnected from the alternating-voltage network, with such a speed that the voltage occurring at the thyristor switch is no greater than about 1.5 times the maximum network voltage. In the discharge circuit, a variable inductive reactive resistance can be a discharge circuit choke having an iron core or the primary winding of a transformer. When the capacitor is connected to the alternating-voltage network, the discharge circuit choke is unsaturated and its reactive resistnace is large (or the transformer secondary is open) so that no significant leakage current can flow via the discharge circuit. After the capacitor is disconnected from the alternating-voltage network, the discharge circuit choke is saturated and its reactive resistance is small (or the transformer secondary is shortcircuited) so that a large discharge current can flow. No switching element is required in the discharge circuit. In order to limit the rectifier current of the thyristor switch and to change this rectifier current with time, an air choke is provided. The maximum rectifier voltage is limited by surge dissipators of zinc oxide.
    • 在用于交流电压网络中的电容或无功功率的无功功率补偿器中,电容器通过晶闸管开关短时间连接到交流电压网络。 为了降低晶闸管开关上的电压负载,放电电路与电容器并联。 通过该电路,电容器可以以与在晶闸管开关上发生的电压不超过最大网络电压的1.5倍的速度在与交流电网络断开之后放电。 在放电电路中,可变感应无功电阻可以是具有铁芯或变压器的初级绕组的放电电路扼流圈。 当电容器连接到交流电压网络时,放电电路扼流圈是不饱和的,其无功功率大(或变压器二次开路),使得没有明显的漏电流可以通过放电电路流动。 电容器从交流电网断开后,放电电路扼流圈饱和,其无功电阻小(或变压器二次短路),使得放电电流大。 在放电电路中不需要开关元件。 为了限制晶闸管开关的整流电流并随时间改变整流器电流,提供空气扼流圈。 最大整流电压受氧化锌浪涌耗散器限制。
    • 3. 发明授权
    • Method of taking a pole of a high-voltage d-c transmission station out
of service
    • 将高压d-c变电站极点停止使用的方法
    • US4200907A
    • 1980-04-29
    • US887245
    • 1978-03-16
    • Michael HauslerKadry Sadek
    • Michael HauslerKadry Sadek
    • H02H7/26H02J3/36H02M5/40
    • H02H7/268H02J3/36Y02E60/60
    • Method of taking a pole of high-voltage d-c transmission system (HVDCTS) out of service, having a rectifier station connected to a first three-phase network and an inverter station connected to a second three-phase network, two d-c lines connected from one station to the other, each station being divided into halves, the station halves of each station being connected together on one side to a station center grounding electrode, the other side of each station being connectible to the positive d-c line so as to form a positive pole, and to the negative d-c line so as to form a negative pole, and residual-current switching means for taking a pole out of service, which includes grounding the station pole through a pole grounding switch which is spaced from the station center grounding electrode, and subsequently commutating a partial fault current of other poles, occurring from the pole being taken out of service, into the station center grounding electrode by the residual-current switch in the form of a circuit breaker.
    • 将高压直流输电系统(HVDCTS)的极点停止使用,具有连接到第一三相网络的整流站和连接到第二三相网络的逆变器站的方法,从一个 站到另一个,每个站被分成两半,每个站的一半站在一侧连接到站中心接地电极,每个站的另一侧可连接到正直流线,以形成正 极和负直流线形成负极,剩余电流切换装置使极点停止使用,其包括通过与站中心接地极间隔开的极接地开关使站极接地 ,并且随后将从极点发生的其他极的部分故障电流换成停止使用的剩余电流开关i到站中心接地电极 n断路器的形式。
    • 5. 发明申请
    • DEVICE FOR FLEXIBLE POWER TRANSMISSION AND DEICING OF A HIGH-VOLTAGE POWER LINE BY MEANS OF DIRECT CURRENT
    • 柔性电力传输装置和直流电流检测高压电力线
    • US20100033028A1
    • 2010-02-11
    • US12515027
    • 2007-11-14
    • Kadry SadekFrank SchettlerKarl Ücker
    • Kadry SadekFrank SchettlerKarl Ücker
    • H05K7/20H02M7/00
    • H02J3/36H02G7/16Y02E60/60
    • In order to provide an apparatus (1) for flexible power transmission and for deicing of a high-voltage line, which has a plurality of phases, by means of direct current, with an AC voltage connection of the high-voltage line which has a number of phases corresponding to the phases of the high-voltage line, each phase having at least one inductance (6) and a valve circuit (10) connected in series with each inductance (6), with the valve circuit (10) being connected by means of a junction point (11) to the AC voltage connection, and having a first current path (14) with a first power semiconductor valve (12) and a second current path (15) with a second power semiconductor valve (13), with the power semiconductor valves (12, 13) being connected in opposite senses with respect to one another with reference to the junction point (11) and in which case the first and the second current path (15) can be connected to a TCR star point by means of at least one star point switch (16, 17), whose design is simple and at the same time costs little, it is proposed that the TCR star point (18) is connected via a connecting line to a star point of a zero phase-sequence system suppression means (2, 21).
    • 为了提供一种用于通过直流电的柔性功率传输和具有多相的高电压线路的除冰装置(1),该高压线路具有高压线路的AC电压连接,该高压线路具有 与高压线的相位对应的相位数,每相具有与每个电感(6)串联连接的至少一个电感(6)和阀电路(10),阀电路(10)被连接 通过与AC电压连接的连接点(11),并且具有带有第二功率半导体阀(13)的具有第一功率半导体阀(12)和第二电流通路(15)的第一电流通路(14) 功率半导体阀(12,13)相对于连接点(11)相对于彼此以相反的方式连接,并且在这种情况下,第一和第二电流通路(15)可以连接到TCR 通过至少一个星点开关(16,17)的星点, 符号简单,同时成本很低,建议TCR星点(18)经由连接线连接到零相序系统抑制装置(2,21)的星点。
    • 6. 发明授权
    • Twelve-pulse HVDC transmission
    • 十二脉冲HVDC传输
    • US07881078B2
    • 2011-02-01
    • US11908191
    • 2006-03-06
    • Marcos PereiraKadry Sadek
    • Marcos PereiraKadry Sadek
    • H02M5/45
    • H02J3/36H02M5/45H02P2201/13Y02E60/60
    • A device for transmitting electric power between alternating voltage networks includes converters interconnected by direct current lines and provided each with several six-pulse conversion bridges. The six-pulse conversion bridges of one same converter are capable of being connected to an alternating voltage network associated with the converters via inductances differently phase-shifted. A control unit is provided to energize the valves of the six-pulse conversion bridges. The device is more economical and the converters are interconnected by a plurality of direct current circuits, each direct current circuit being galvanically separated from at least an alternating voltage network.
    • 用于在交流电压网络之间传输电力的装置包括通过直流线互连的转换器,并且每个转换器提供有几个六脉冲转换桥。 一个相同转换器的六脉冲转换桥能够通过不同相位的电感连接到与转换器相关联的交流电压网络。 提供一个控制单元来激励六脉冲转换桥的阀。 该装置更经济,并且转换器通过多个直流电路互连,每个直流电路与至少一个交流电压网电流隔离。
    • 7. 发明申请
    • Twelve-pulse HVDC Transmission
    • 十二脉冲HVDC传输
    • US20090225570A1
    • 2009-09-10
    • US11908191
    • 2006-03-06
    • Marcos PereiraKadry Sadek
    • Marcos PereiraKadry Sadek
    • H02M5/45
    • H02J3/36H02M5/45H02P2201/13Y02E60/60
    • A device for transmitting electric power between alternating voltage networks includes converters interconnected by direct current lines and provided each with several six-pulse conversion bridges. The six-pulse conversion bridges of one same converter are capable of being connected to an alternating voltage network associated with the converters via inductances differently phase-shifted. A control unit is provided to energize the valves of the six-pulse conversion bridges. The device is more economical and the converters are interconnected by a plurality of direct current circuits, each direct current circuit being galvanically separated from at least an alternating voltage network.
    • 用于在交流电压网络之间传输电力的装置包括通过直流线互连的转换器,并且每个转换器提供有几个六脉冲转换桥。 一个相同转换器的六脉冲转换桥能够通过不同相位的电感连接到与转换器相关联的交流电压网络。 提供一个控制单元来激励六脉冲转换桥的阀。 该装置更经济,并且转换器通过多个直流电路互连,每个直流电路与至少一个交流电压网电流隔离。
    • 8. 发明授权
    • Method and compensating device for compensating current oscillations
    • 用于补偿电流振荡的方法和补偿装置
    • US4639846A
    • 1987-01-27
    • US830721
    • 1986-02-19
    • Peter DahlerPeter NeidhartKadry SadekHerbert Stemmler
    • Peter DahlerPeter NeidhartKadry SadekHerbert Stemmler
    • H02M1/14H02J3/36H02M7/757H02J1/02
    • H02J3/36H02M7/7575H02J2003/365Y02E60/60
    • To reduce unwanted current oscillations such as, for example, of the second harmonic of the system frequency (f.sub.o), the firing angles (.alpha.1, .alpha.2) of a link-circuit rectifier (1) and of a link-circuit inverter (2) are compensatingly acted on in push-pull mode. For this purpose, a direct-current link-circuit current signal (S5, S5'), which contains the instability or the current oscillation to be compensated, is fed by means of a current detector (5, 5') to a bandpass filter (16, 16', 16") which is tuned to the frequency (f.sub.o, f.sub.x) of the respective current oscillation. The phase of a bandpass filter output signal (S16) is shifted by 90.degree. trailing in a 90.degree. phase-shifting section (15, 15', 15"). A compensating signal (S15,S15', S15") obtained in this manner is fed to first and second function generators (13, 13', 13"; 14, 14', 14"). The first function generators allow the positive component (S13) to pass and the second function generators allow the negative component (S14) of the compensating signal to pass. The output signal of the first function generator passes via a switch (12') to a summing section (11') for forming the cosine of the firing angle (.alpha.2) of the link-circuit inverter (2). The output signal of the second function generator passes via a switch (12) to a summing section (11) for forming the cosine of the firing angle (.alpha.1) of the link-circuit rectifier (1). By these means, the firing angle (.alpha.2) of the link-circuit inverter (2) is reduced when the direct-current link-circuit current signal is dropping and the firing angle (.alpha.1) of the link-circuit rectifier (1) is increased when it is rising.
    • 为了减少不必要的电流振荡,例如系统频率(fo)的二次谐波,链路电路整流器(1)和链路电路逆变器(1)的触发角(α1,α2) 2)在推挽模式下被补偿地作用。 为此,包含不稳定性或待补偿的当前振荡的直流链路电路信号(S5,S5')通过电流检测器(5,5')馈送到带通滤波器 (16,16',16“),其被调谐到各个电流振荡的频率(fo,fx)。 带通滤波器输出信号(S16)的相位在90°相移部分(15,15',15“)内移动90°。 以这种方式获得的补偿信号(S15,S15',S15“)被馈送到第一和第二功能发生器(13,13',13”; 14,14',14“)。 第一函数发生器允许正分量(S13)通过,第二函数发生器允许补偿信号的负分量(S14)通过。 第一函数发生器的输出信号通过开关(12')通过求和部分(11'),用于形成链路电路逆变器(2)的触发角(α2)的余弦。 第二函数发生器的输出信号通过开关(12)通过求和部分(11),以形成连接电路整流器(1)的触发角(α1)的余弦。 通过这些方式,当直流链路电路电流信号下降时,链路电路逆变器(2)的触发角(α2)减小,并且链路电路整流器(1)的触发角(α1) )在上升时增加。
    • 9. 发明授权
    • Device for flexible power transmission and deicing of a high-voltage power line by means of direct current
    • 用于通过直流电灵活地传输和除冰高压电力线的装置
    • US08264102B2
    • 2012-09-11
    • US12515027
    • 2007-11-14
    • Kadry SadekFrank SchettlerKarl Ücker
    • Kadry SadekFrank SchettlerKarl Ücker
    • H05K7/14
    • H02J3/36H02G7/16Y02E60/60
    • In order to provide an apparatus (1) for flexible power transmission and for deicing of a high-voltage line, which has a plurality of phases, by means of direct current, with an AC voltage connection of the high-voltage line which has a number of phases corresponding to the phases of the high-voltage line, each phase having at least one inductance (6) and a valve circuit (10) connected in series with each inductance (6), with the valve circuit (10) being connected by means of a junction point (11) to the AC voltage connection, and having a first current path (14) with a first power semiconductor valve (12) and a second current path (15) with a second power semiconductor valve (13), with the power semiconductor valves (12, 13) being connected in opposite senses with respect to one another with reference to the junction point (11) and in which case the first and the second current path (15) can be connected to a TCR star point by means of at least one star point switch (16, 17), whose design is simple and at the same time costs little, it is proposed that the TCR star point (18) is connected via a connecting line to a star point of a zero phase-sequence system suppression means (2, 21).
    • 为了提供一种用于通过直流电的柔性功率传输和具有多相的高电压线路的除冰装置(1),该高压线路具有高压线路的AC电压连接,该高压线路具有 与高压线的相位对应的相位数,每相具有与每个电感(6)串联连接的至少一个电感(6)和阀电路(10),阀电路(10)被连接 通过与AC电压连接的连接点(11),并且具有带有第二功率半导体阀(13)的具有第一功率半导体阀(12)和第二电流通路(15)的第一电流通路(14) 功率半导体阀(12,13)相对于连接点(11)相对于彼此以相反的方式连接,并且在这种情况下,第一和第二电流通路(15)可以连接到TCR 通过至少一个星点开关(16,17)的星点, 符号简单,同时成本很低,建议TCR星点(18)经由连接线连接到零相序系统抑制装置(2,21)的星点。