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1. 发明授权

US06535404B2 Controlling operation of an AC/DC converter 失效
标题翻译：控制AC / DC转换器的运行
公开(公告)号：US06535404B2
公开(公告)日：2003-03-18
申请号：US09832284
申请日：2001-04-10
申请人： John Desmond Ainsworth , Lorenzo Bottacchiari , Robert Stephen Whitehouse
发明人： John Desmond Ainsworth , Lorenzo Bottacchiari , Robert Stephen Whitehouse
IPC分类号： H02M112
CPC分类号： H02M7/125 , H02M1/12 , H02M7/1555 , H02M7/1623
摘要： An AC/DC converter has an auxiliary control system which attenuates or suppresses an unwanted or non-characteristic harmonic component (such as a 3rd harmonic component) of voltage in an AC power system caused by operation of the converter. The converter comprises thyristors and is connected via transformer to the AC power system which comprises an AC or Thevenin e.m.f. source, an impedance, and busbars. The auxiliary control system is connected to a main control system of the AC/DC converter providing firing pulses for the converter. Input signal including the unwanted harmonic component in the AC power system, is operated on by the auxiliary control system to provide an output signal which is added to a thyristor firing control signal at a summing point of the main control system so that resultant thyristor firing pulses therefrom modify operation of the converter to attenuate or suppress the non-characteristic harmonic component in the DC output of the converter and thereby attenuate or suppress the harmonic component in the AC power system.
摘要翻译： AC / DC转换器具有辅助控制系统，该控制系统衰减或抑制由转换器的操作引起的交流电力系统中的不需要的或非特征的谐波分量（例如三次谐波分量）。转换器包括晶闸管，并通过变压器连接到AC电源系统，AC电源系统包括AC或Thevenin e.m.f. 源，阻抗和母线。辅助控制系统连接到AC / DC转换器的主控制系统，为转换器提供点火脉冲。包括交流电力系统中的不需要的谐波分量的输入信号由辅助控制系统进行操作，以在主控制系统的加法点处提供一个输出信号，该输出信号被加到可控硅点火控制信号上，从而得到晶闸管触发脉冲从而改变转换器的操作以衰减或抑制转换器的DC输出中的非特征谐波分量，从而衰减或抑制交流电力系统中的谐波分量。

2. 发明授权

US06437995B2 Control system adapted to control operation of an ac/dc converter 失效
标题翻译：适用于控制交流/直流转换器运行的控制系统
公开(公告)号：US06437995B2
公开(公告)日：2002-08-20
申请号：US09785674
申请日：2001-02-16
申请人： John Desmond Ainsworth , Robert S. Whitehouse
发明人： John Desmond Ainsworth , Robert S. Whitehouse
IPC分类号： H02M545
CPC分类号： H02M1/12 , H02J3/36 , H02M7/1623 , H02M2007/2195 , Y02B70/1408 , Y02E60/60
摘要： A control system to control at least one of the thyristor converters (1) or (2) of an ac system (7,8) or (9,10) connected by busbars (5,6) and transformers (3,4) to the converters (1,2) which have their dc sides connected by a dc link, for example inductor (11). Each thyristor converter receives firing pulses from a firing control (12) or (13), including a firing angle control (18) and a summing junction (16) receiving a control current signal input (17) and a current signal (14) which is a function of converter operation. An electrical power measurement is made of one of the ac systems, for example the ac system (7,8,5) and in accordance with that power measurement a signal which is a function thereof is produced as an output (19) from an integral two-axis ac servo control having demodulator, integrator and modulator circuit receiving the power measurement signal as input. Signal (19) is a function of the cross-modulation noise component caused by interaction of electrical noise from the two converters. This signal (19) is input to at least the firing control (12) to vary the firing of thyristor converter (1) so as to remove from at least the ac system (7,8,5) the cross-modulation noise. Signal (19) may also be input to firing control (13).
摘要翻译：一种控制系统，用于控制由母线（5,6）和变压器（3,4）连接的交流系统（7,8）或（9,10）的可控硅转换器（1）或（2）中的至少一个至其直流侧通过直流链路连接的转换器（1,2），例如电感器（11）。每个晶闸管转换器接收来自点火控制（12）或（13）的点火脉冲，包括触发角控制（18）和接收控制电流信号输入（17）和电流信号（14）的求和结（16）是转换器操作的功能。电力测量由交流系统（例如交流系统）（7,8,5）中的一个进行，并且根据该功率测量，作为其功能的信号从积分产生为输出（19）具有解调器，积分器和调制器电路的两轴交流伺服控制器，其接收功率测量信号作为输入。信号（19）是由两个转换器的电噪声的相互作用引起的交叉调制噪声分量的函数。该信号（19）至少输入到点火控制（12），以改变晶闸管转换器（1）的点火，从而至少从交流系统（7,8,5）去除交叉调制噪声。信号（19）也可以被输入到点火控制（13）。

3. 发明授权

US06088245A Switching control arrangement 失效
标题翻译：开关控制装置
公开(公告)号：US06088245A
公开(公告)日：2000-07-11
申请号：US124384
申请日：1998-07-28
申请人： John Desmond Ainsworth
发明人： John Desmond Ainsworth
IPC分类号： H02J3/18 , H02M1/12
CPC分类号： H02J3/1857 , Y02E40/12 , Y02E40/26
摘要： A switching control arrangement for a multilevel convertor minimizes the harmonic content of the converter voltage or current by an open-loop and/or a closed-loop control of the timing of the switching of the GTOs associated with the energy-storage components (e.g. capacitors) in the convertor. In a first open-loop arrangement the convertor current is quantized over its working range and different threshold values are provided in dependence on the quantization values of the current. In a second open-loop arrangement a continuous, non-quantized control is provided based on at least a quadratic approximation to the desired current-dependent behavior of the GTO switching angles. In a third, closed-loop arrangement, different GTO-switching threshold levels are provided as controlled by a Fourier integration process involving the nulling of those harmonics desired to be nulled. The control arrangement is applicable to chain or stacked-capacitor multilevel convertors and can be employed in SVC applications or applications in which the convertor draws real power as well as reactive power.
摘要翻译：用于多电平转换器的开关控制装置通过对与能量存储部件（例如电容器）相关联的GTO的切换定时的开环和/或闭环控制来最小化转换器电压或电流的谐波含量）在转换器。在第一开环布置中，转换器电流在其工作范围内量化，并且根据电流的量化值提供不同的阈值。在第二开环布置中，基于至少对GTO切换角的期望的电流相关行为的二次近似来提供连续的非量化控制。在第三个闭环装置中，提供不同的GTO切换阈值电平，这是由傅立叶积分过程控制的，该方法涉及要求归零的那些谐波的归零。该控制装置适用于链式或堆叠式电容器多电平转换器，并可用于SVC应用或转换器吸取实际功率以及无功功率的应用。

4. 发明授权

US06441712B2 Tuned filters for electric power systems 失效
标题翻译：电力系统调谐滤波器
公开(公告)号：US06441712B2
公开(公告)日：2002-08-27
申请号：US09797415
申请日：2001-03-01
申请人： John Desmond Ainsworth
发明人： John Desmond Ainsworth
IPC分类号： H01F2108
CPC分类号： H02J3/01 , Y02E40/40
摘要： A tuned filter for connection to a busbar in a high voltage electric power system. The filter incorporates a variable inductor comprising a main winding, auxiliary windings and switching circuitry associated with each auxiliary winding. The auxiliary windings are arranged to act in inductive series with respect to the main winding, and the switching circuitry is used to selectively connect the auxiliary windings in electrical series with the main winding, so allowing the inductance of the inductor to be varied. To achieve enhanced variability of the inductance, each auxiliary winding has a number of turns substantially equal to x2(n−1), where n is a positive integer corresponding to the position of each auxiliary winding in the inductive series of auxiliary windings and x is also a positive integer. The switching circuitry is preferably constituted such that each auxiliary winding is selectively connectable to the main winding in any one of three connection modes, comprising a first connection mode in which the auxiliary winding assists the inductance of the main winding, a second connection mode in which the auxiliary winding opposes the inductance of the main winding, an a third connection mode in which the auxiliary winding is bypassed with respect to the main winding.
摘要翻译：用于连接到高压电力系统中母线的调谐滤波器。滤波器包括可变电感器，其包括与每个辅助绕组相关联的主绕组，辅助绕组和开关电路。辅助绕组被布置为相对于主绕组感应串联起动，并且开关电路用于选择性地将辅助绕组与主绕组电连接，从而允许电感器的电感变化。为了实现电感的增强的可变性，每个辅助绕组的匝数基本上等于x2（n-1），其中n是对应于辅助绕组的感应系列中每个辅助绕组的位置的正整数，x是也是一个正整数。开关电路优选地构成为使得每个辅助绕组以三种连接模式中的任何一种选择性地连接到主绕组，包括辅助绕组辅助主绕组的电感的第一连接模式，其中第二连接模式辅助绕组与主绕组的电感相反，辅助绕组相对于主绕组旁路的第三连接模式。

5. 发明授权

US3668413A Control system for high voltage d.c. link connected between a.c. systems 失效
标题翻译：控制系统用于交流系统之间的高压直流连接
公开(公告)号：US3668413A
公开(公告)日：1972-06-06
申请号：US3668413D
申请日：1970-05-11
申请人： JOHN DESMOND AINSWORTH , ENGLISH ELECTRIC CO LTD
发明人： AINSWORTH JOHN DESMOND
IPC分类号： H02J3/36 , H02M
CPC分类号： H02J3/36 , Y02E60/60 , Y10T307/367
摘要： The invention in this application relates to a control system for controlling the power or current in an H.V.D.C. link connected between two a.c. systems and is employed particularly to damp power oscillations developed in such systems which frequently occur after any large disturbances, such as a temporary line short circuit. In particular, the system includes apparatus for defining an output signal proportional to a change function of absolute phase angle phi of the alternating voltage in at least one of the a.c. systems, and a control circuit for controlling the converters in the d.c. link. The control circuit is responsive to a signal depending on both the output signal from the apparatus and a predetermined order signal whereby the d.c. link is controlled to have a component of variation proportional to the said change function.
摘要翻译：本申请的发明涉及一种用于控制H.V.D.C.中的功率或电流的控制系统。链路连接在两个a.c. 系统，并且被特别用于衰减在诸如临时线路短路的任何大的干扰之后经常发生的这种系统中产生的功率振荡。特别地，该系统包括用于定义与交流电压的绝对相位角度phi的变化函数成比例的输出信号的装置。系统和用于控制直流电路中的转换器的控制电路。链接。控制电路根据来自装置的输出信号和预定的顺序信号对信号进行响应，由此直流。链路被控制成具有与所述改变功能成比例的变化的分量。

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