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1.发明公开Observer based monitoring and control of submodules in modular multilevel converter 审中-公开BeobachterbasierteÜberwachungund Regelung von Submodulen in einem modularen Multilevelumrichter
公开(公告)号：EP2882089A1
公开(公告)日：2015-06-10
申请号：EP13195871.2
申请日：2013-12-05
发明人： Oates, Colin
摘要： This application relates to control methods and apparatus for a voltage source converter (100) comprising a plurality of energy storage devices (202) which can be selectively connected into an arm (301) of the voltage source converter. The apparatus comprises a model module (304) configured to generate a modelled value related to a first electrical parameter of the voltage source converter based on one or more model parameters and the operation of the voltage source converter. The apparatus further includes a model adaptation module (305) configured to receive the modelled value (VS) and also a measured value (VCap) related to the first electrical parameter, to determine an error between said modelled value and said measured value, and to generate a model control signal (Mcon) for adapting the model based on said error so that the modelled value substantially corresponds to the measured value. Control circuitry (303) is responsive to said model module and/or said model adaptation module to control operation of the VSC.
摘要翻译： 本申请涉及一种用于电压源转换器（100）的控制方法和装置，包括可以选择性地连接到电压源转换器的臂（301）中的多个能量存储装置（202）。 该装置包括模型模块（304），其被配置为基于一个或多个模型参数和电压源转换器的操作来生成与电压源转换器的第一电参数相关的建模值。 该装置还包括配置成接收建模值（VS）以及与第一电参数相关的测量值（VCap）的模型适配模块（305），以确定所述建模值与所述测量值之间的误差，以及 生成模型控制信号（Mcon），用于基于所述误差来适应模型，使得建模值基本上对应于测量值。 控制电路（303）响应于所述模型模块和/或所述模型适配模块来控制VSC的操作。
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公开(公告)号：EP2871740A1
公开(公告)日：2015-05-13
申请号：EP13192363.3
申请日：2013-11-11
发明人： Oates, Colin
摘要： This application relates to methods and apparatus for control apparatus of a voltage converter (401) for direct current transmission of electrical power over a transmission line (402). The control apparatus comprises regulation circuitry (403) for generating a regulation signal for the converter to regulate an electrical parameter of the transmission line, such as voltage or power. The regulation signal is based on the difference between a measured value of said parameter and a reference value of said parameter, as may be supplied from a reference control block (404) and may be derived from a demand signal indicating the voltage or power demand. The apparatus also includes damping circuitry (405) configured to generate a damping signal for modulating said regulation signal to reduce the effect of resonance within the bandwidth of control of the converter. The damping signal is generated as a function of a measured voltage or current of the transmission line and an impedance value for the transmission line. The damping signal may be high-pass filtered (407) so as to have no substantial impact on steady state operation.
摘要翻译： 本申请涉及用于通过传输线（402）直流电力传输电压的电压转换器（401）的控制装置的方法和装置。 控制装置包括调节电路（403），用于产生用于转换器的调节信号以调节传输线的电参数，例如电压或功率。 调节信号基于所述参数的测量值和所述参数的参考值之间的差异，可以从参考控制块（404）提供，并且可以从指示电压或功率需求的需求信号导出。 该装置还包括阻尼电路（405），其被配置为产生用于调制所述调节信号的阻尼信号，以减小在转换器的控制带宽内的共振效应。 作为传输线的测量电压或电流以及传输线的阻抗值的函数产生阻尼信号。 阻尼信号可以被高通滤波（407），从而对稳态操作没有实质的影响。
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公开(公告)号：EP2924860A1
公开(公告)日：2015-09-30
申请号：EP14161430.5
申请日：2014-03-25
IPC分类号： H02M1/15 , H02M7/5388 , H02M7/483
CPC分类号： H02M5/458 , H02M1/12 , H02M1/14 , H02M1/15 , H02M7/217 , H02M7/219 , H02M7/483 , H02M7/487 , H02M7/493 , H02M7/5388 , H02M2001/0058 , H02M2007/4835 , Y02B70/1491
摘要： This application describes a voltage source converter (300) of the controlled transition bridge type, having three phase limbs, each phase limb having a high side director switch (S w1 , S W3 , S W5 ) and a low side director switch (S w4 , S W6 , S W2 ) connecting a respective DC terminal (DC+, DC-) to an AC node (102a-c) for that phase limb. Chain-link circuits (101 a-c) for each phase limb comprise a plurality of series connect cells (103), each cell having an energy storage element (105) that can be selectively connected in series or bypassed. The chain-link circuits are operated in a voltage mode to provide a defined voltage transition at the AC node during a transition between one director switch being turned off and the other directors switch being turned on. In embodiments of the invention the chain-link circuits (101 a-c) are connected to a common node such that, in use, a current can flow from one phase limb to another via the respective chain-link circuits. A converter controller (900) operates a chain-link circuit of a phase limb in a current mode to provide a defined chain-link current for at least part of the time when that phase limb is not in a transition state. The defined current can allow correct circulation of the DC current and/or provide capacitor balancing of the capacitors of a chain-link circuit. Additional chain-link circuits (301, 302) are provided between the DC terminals and the common node to provide a DC current in a converter state where all the high side or low side director switches are off at the same time.
摘要翻译： 本申请描述了具有三个相臂的受控过渡桥类型的电压源转换器（300），每个相臂具有高侧导向器开关（Sw1，SW3，SW5）和低侧导向器开关（Sw4，SW6，SW2 ）将相应的DC端子（DC +，DC-）连接到该相臂的AC节点（102a-c）。 用于每个相臂的链节电路（101a-c）包括多个串联连接单元（103），每个单元具有能够选择性地串联或旁路连接的能量存储元件（105）。 链节电路以电压模式操作，以在一个导向器开关断开和另一个导通开关导通之间的转换期间在AC节点处提供限定的电压转换。 在本发明的实施例中，链节电路（101a-c）连接到公共节点，使得在使用中，电流可以经由相应的链式链路电路从一个相位臂流到另一个。 转换器控制器（900）在当前模式下操作相臂的链式连接电路，以在该相臂不处于过渡状态时至少部分时间提供限定的链式电流。 限定的电流可以允许直流电流的正确循环和/或提供链环电路的电容器的电容器平衡。 在DC端子和公共节点之间提供额外的链式电路（301,302），以在所有高侧或低侧导向器开关同时断开的转换器状态下提供DC电流。
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公开(公告)号：EP2800265A1
公开(公告)日：2014-11-05
申请号：EP13275109.0
申请日：2013-05-03
CPC分类号： H02M7/68 , H02J3/36 , H02J5/00 , H02M1/083 , H02M1/12 , H02M1/38 , H02M7/219 , H02M7/483 , H02M2001/0058 , H02M2007/4835
摘要： A voltage source converter (30) comprises:
a converter limb (36) extending between first and second DC terminals (32,34) and having first and second limb portions (38,40) separated by an AC terminal (42), the first and second DC terminals (32,34) being connectable to a DC electrical network (44) and the AC terminal (42) being connectable to an AC electrical network (46), each limb portion (38,40) including a primary switching element (48), the primary switching element (48) of each limb portion (38,40) being switchable to switch the corresponding limb portion (38,40) into and out of circuit between the corresponding DC terminal (32,34) and the AC terminal (42) to control the configuration of an AC voltage at the AC terminal (42);
an auxiliary limb (50) including an auxiliary converter, the auxiliary converter including at least one auxiliary switching element, the auxiliary limb (50) being connected to the AC terminal (42), the primary switching element (48) of each limb portion (38,40) being switchable to switch the auxiliary limb (50) into and out of circuit with the corresponding limb portion (38,40) and thereby switch the auxiliary limb (50) into and out of circuit with the corresponding DC terminal (32,34); and
a control unit to selectively control the switching of the or each auxiliary switching element of the auxiliary converter to control the auxiliary limb (50) as a current source in a primary operating mode to inject a circulation current (68) that flows in one direction in one of the first and second limb portions (38,40) to minimise a limb portion current (66) flows in the opposite direction in that limb portion (38,40).摘要翻译： 电压源转换器（30）包括：在第一和第二DC端子（32,34）之间延伸并具有由AC端子（42）分开的第一和第二臂部分（38,40）的转换器臂（36），第一 和第二DC端子（32,34）可连接到DC电网（44），并且AC端子（42）可连接到AC电网（46），每个臂部分（38,40）包括初级开关元件 （48）中，每个肢体部分（38,40）的初级开关元件（48）可切换以将相应的肢体部分（38,40）切换进入和离开相应的DC端子（32,34）和 AC端子（42），用于控制AC端子（42）处的AC电压的配置; 包括辅助转换器的辅助分支（50），辅助转换器包括至少一个辅助开关元件，辅助分支（50）连接到AC端子（42），每个分支部分的初级开关元件（48） 38,40）可切换以将辅助支路（50）与对应的支路部分（38,40）切换进入和切断电路，从而将辅助支路（50）与对应的DC端子（32 ，34）; 以及控制单元，用于选择性地控制所述辅助转换器的所述辅助开关元件或每个辅助开关元件的切换，以在所述主要操作模式中将所述辅助分支（50）控制为电流源以注入沿一个方向流动的循环电流（68） 在第一和第二肢体部分（38,40）中的一个中，以最小化肢体部分电流（66）在该肢体部分（38,40）中沿相反方向流动。
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5.发明公开Voltage source converter comprising a chain-link converter 审中-公开Spannungszwischenkreisumrichter mit modularem Multilevelumrichter
公开(公告)号：EP2755317A1
公开(公告)日：2014-07-16
申请号：EP13275006.8
申请日：2013-01-11
CPC分类号： H02M7/757 , H02J3/36 , H02J2003/365 , H02M7/5152 , H02M7/7575 , H02M7/797 , H02M2001/0048 , H02M2007/4835 , Y02B70/1491 , Y02E60/60
摘要： A voltage source converter (30) comprises:
at least two converter limbs (36), each converter limb (36) extending between first and second DC terminals (32,34) and having first and second limb portions (38,40) separated by an AC terminal (42), the first and second DC terminals (32,34) being connectable to a DC electrical network (46) and each AC terminal (42) being connectable to a AC electrical network (48), each limb portion (38,40) including at least one switching element (50);
at least one chain-link converter (52), the or each chain-link converter (52) including a plurality of series-connected modules, each module including at least one switching element and at least one energy storage device, the or each switching element and the or each energy storage device of each module combining to selectively provide a voltage source, the or each chain-link converter (52) forming a branch to interconnect two of the AC terminals (42), each limb portion (38,40) of each converter limb (36) being switchable to switch the or each corresponding chain-link converter (52) into and out of circuit with that limb portion (38,40) and thereby switch the or each corresponding chain-link converter (52) into and out of circuit with the respective DC terminal (32,34), the or each chain-link converter (52) being switchable to control the configuration of an AC voltage at each corresponding AC terminal (42); and
a control unit (54), wherein the control unit (54) coordinates the switching of the limb portions (38,40) and the or each chain-link converter (52) to cause transfer of real power between the AC and DC electrical networks (48,46).摘要翻译： 电压源转换器（30）包括：至少两个转换器分支（36），每个转换器分支（36）在第一和第二直流端子（32,34）之间延伸并且具有第一和第二分支部分（38,40） AC端子（42），第一和第二DC端子（32,34）可连接到DC电网（46），并且每个AC端子（42）可连接到AC电网（48），每个分支部分 38,40），包括至少一个开关元件（50）; 至少一个链条转换器（52），所述链路转换器（或每个链接转换器）包括多个串联连接的模块，每个模块包括至少一个开关元件和至少一个能量存储装置，所述或每个开关 元件和每个模块的或每个能量存储装置组合以选择性地提供电压源，所述链路转换器（或每个链接转换器）形成分支以互连两个AC端子（42），每个分支部分（38,40 每个转换器分支（36）的开关可切换以使该或每个相应的链式转换器（52）与该肢体部分（38,40）进出电路，从而切换或相应的链式转换器（52） ）与相应的直流端子（32,34）进入和断开，所述或每个链节转换器（52）可切换以控制每个对应的AC端子（42）处的AC电压的配置; 以及控制单元（54），其中所述控制单元（54）协调所述肢体部分（38,40）和所述链节转换器（52）的切换，以使所述AC和DC电气之间的有功功率传递 网络（48,46）。
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公开(公告)号：EP2755315A1
公开(公告)日：2014-07-16
申请号：EP13275005.0
申请日：2013-01-11
CPC分类号： H02M7/217 , H02M7/219 , H02M7/483 , H02M7/493 , H02M2007/4835
摘要： A voltage source converter (30) comprises a converter limb (36), the converter limb (36) extending between first and second DC terminals (32,34) and having primary and secondary limb elements connected in parallel between the first and second DC terminals (32,34), each DC terminal (32,34) being connectable to a DC electrical network (44), the primary limb element including first and second primary limb element portions (38,40) separated by a third terminal (42), the third terminal (42) being connectable to an AC electrical network (46), each primary limb element portion (38,40) including at least one primary switching element (50), each primary switching element (50) being switchable to switch the corresponding primary limb element portion (38,40) into and out of circuit between a respective one of the DC terminals (32,34) and the third terminal (42), the secondary limb element including first and second secondary limb element portions (52,54) separated by a junction (56), each secondary limb element portion (52,54) including a DC side chain-link converter (58), each chain-link converter (58) including a plurality of series-connected modules (60), each module (60) of each chain-link converter (58) including at least one secondary switching element and at least one energy storage device, the or each secondary switching element and the or each energy storage device in each module (60) combining to selectively provide a voltage source, the converter limb (36) further including a connection interconnecting the third terminal (42) and the junction (56) to form a star configuration in which a first branch of the star configuration includes the connection, a second branch of the star configuration includes the first secondary limb element portion (52), a third branch of the star configuration includes the second secondary limb element portion (54) and the junction (56) defines a mid-point of the star configuration, wherein the voltage source converter (30) further includes a control unit (62) which controls the switching of each primary switching element to switch the corresponding primary limb element portion (38,40) into and out of circuit between the corresponding DC terminal (32,34) and the third terminal (42) to selectively transfer power between the AC and DC electrical networks (46,44) via each of the primary limb element portions (38,40), the control unit (62) further controlling the switching of the or each secondary switching element in each module (60) of each DC side chain-link converter (58) to control the configuration of an AC voltage waveform at the third terminal (42).
摘要翻译： 电压源转换器（30）包括转换器臂（36），转换器臂（36）在第一和第二DC端子（32,34）之间延伸并具有并联连接在第一和第二DC端子 （32,34），每个直流端子（32,34）可连接到直流电网（44），所述主支路元件包括由第三端子（42）分开的第一和第二主支路元件部分（38,40） ，所述第三端子（42）可连接到AC电网（46），每个初级肢体元件部分（38,40）包括至少一个主开关元件（50），每个主开关元件（50）可切换以切换 在相应的一个直流端子（32,34）和第三端子（42）之间的相应的主要肢体元件部分（38,40）进入和离开电路，次级肢体元件包括第一和第二辅助肢体元件部分 52,54），由连接点（56）分隔，每个第二个 每个链节转换器（58）包括多个串联连接的模块（60），每个链条转换器（58）包括多个串联连接的模块（60），每个链条转换器（58） 链路转换器（58），包括至少一个次级开关元件和至少一个能量存储装置，每个模块（60）中的或每个次级开关元件和/或每个能量存储装置组合以选择性地提供电压源，转换器臂 （36）还包括连接所述第三端子（42）和所述接头（56）的连接，以形成星形结构，其中所述星形结构的第一分支包括所述连接，所述星形结构的第二分支包括所述第一辅助臂 元件部分（52），星形结构的第三分支包括第二辅助肢体元件部分（54），并且接合部（56）限定星形结构的中点，其中电压源转换器（30）还包括 控制单元（62），其控制每个初级开关元件的切换以将相应的主支路元件部分（38,40）切换到对应的直流端子（32,34）和第三端子（42）之间的电路中， 经由每个主要肢体部分（38,40）选择性地在AC和DC电力网络（46,44）之间传输电力，控制单元（62）还控制每个模块中的每个次级开关元件的切换 （60），以控制第三端子（42）处的交流电压波形的配置。
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