WO2012122689A1 - 一种模块化多电平柔性直流输电阀基控制设备 - Google Patents

一种模块化多电平柔性直流输电阀基控制设备 Download PDF

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Publication number
WO2012122689A1
WO2012122689A1 PCT/CN2011/001815 CN2011001815W WO2012122689A1 WO 2012122689 A1 WO2012122689 A1 WO 2012122689A1 CN 2011001815 W CN2011001815 W CN 2011001815W WO 2012122689 A1 WO2012122689 A1 WO 2012122689A1
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Prior art keywords
board
interface
central processing
control device
valve base
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PCT/CN2011/001815
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English (en)
French (fr)
Inventor
杨岳峰
高阳
王韧秋
张新刚
贺之渊
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中国电力科学研究院
国家电网公司
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Publication of WO2012122689A1 publication Critical patent/WO2012122689A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/001—Hot plugging or unplugging of load or power modules to or from power distribution networks

Definitions

  • the invention relates to the field of power electronic direct current transmission of a power system, and particularly relates to a chassis design of a modular multi-level flexible DC power transmission valve based control device. . Background technique:
  • Flexible DC transmission is a new transmission method using DC as the medium. It adopts voltage source converter based on turn-off device and advanced modulation technology for DC transmission. It is a useful supplement to the AC grid and can realize power transmission. At the same time, improve the transmission capacity and stability of the existing AC transmission system, so that the existing AC transmission system can be more effectively utilized.
  • the modular multilevel converter consists of a series of submodules consisting of a bypass switch, a thyristor, an IGBT, a diode and a capacitor. The modular multi-level converter needs different real-time switching control of the individual sub-modules according to the capacitor voltage and the sub-module working state. The more the level, the shorter the real-time control period, and the more difficult the capacitor voltage balance control is.
  • the conventional DC transmission valve-based electronic equipment is only an actuator, and in addition to the valve monitoring and protection functions, it does not have real-time control capability for different sub-modules.
  • the control and protection requirements of modular flexible DC transmission valves have not been met, so a device with real-time control protection is required to meet the requirements of modular multi-level flexible direct current transmission.
  • the valve control unit of the invention is an interface device between the modular multi-level flexible direct current transmission control protection system and the sub-module controller, and can realize the real-time control and protection function of the modular multi-level flexible DC valve. Summary of the invention:
  • the technical problem to be solved by the present invention is to design a valve-based control device to meet the needs of different flexible DC transmission capacity levels.
  • the invention provides a modular multi-level flexible DC transmission valve base control device, which comprises a power board, an interface board, a back board and a central processing board; and the improvement is that the interface board and the power supply
  • the board is disposed on two sides of the central processing board: the central processing board, the interface board and the power board are disposed on the back board.
  • valve-base control apparatus of the first preferred embodiment of the present invention is improved in that the central processing board is two central processing boards juxtaposed together.
  • the valve base control device is characterized in that the power supply board is provided with two blocks disposed on the outermost side of the back plate.
  • the valve base control device of the third preferred embodiment of the present invention is improved in that the number of the interface boards is greater than one, and each of the interface boards is provided with a light receiver and an optical transmitter, and the interface board It is connected to the flexible DC converter valve submodule control unit.
  • the valve-based control device of the fourth preferred embodiment provided by the present invention is characterized in that: the central processing board and the backboard are provided with 60 pairs of wires; and 12 pairs of wires are disposed between the backboard and the interface board. .
  • One pair of wires refers to two wires.
  • the valve-based control device of the fifth preferred embodiment of the present invention is improved in that the interface board and the sub-module control SMC unit are connected by six pairs of transceiver fibers.
  • One pair of fibers refers to two fibers.
  • valve-based control device of the more preferred embodiment provided by the present invention is improved in that the power supply board is provided with two blocks disposed on the outermost side of the backboard.
  • a valve-based control device is improved in that the number of the interface boards is greater than one, and each of the interface boards is provided with a light receiver and an optical transmitter, and the interface board It is connected to the flexible DC converter valve sub-module control unit SMC.
  • the invention adopts a unified hardware structure design, so that the current control unit and the bridge arm control unit of the valve base control device VBC can be flexibly combined to meet the requirements of different flexible direct current transmission projects;
  • the invention adopts the design idea of the dual central processing board to ensure the reliability of real-time operation
  • the invention performs preprocessing of data on each interface board, prioritizes the returned capacitor voltage, and finally simplifies the parallel data into an effective serial data uploading centrally.
  • the invention pre-processes the return information of each sub-module responsible for the sub-module and simplifies it into a one-frame data uploading central processing board, and retains the effective information, which greatly shortens the transmission and processing time of the central processing board for the return information.
  • the sub-module control command of the invention is transmitted to the interface board in real time, and the back-board communication rate can reach more than one hundred megabytes.
  • the low-voltage differential technology Lvds data bus and the clock bus are simultaneously used to greatly improve the data transmission rate, and also ensure the same data transmission. Ambiguity
  • Dual central processing board design and optional interface board design improve data transmission reliability and scalability
  • the interface board first performs data pre-processing and uploads the valid data to the central processing board, which greatly improves the computational efficiency of the central processing board;
  • FIG. 1 is a schematic diagram of a VBC chassis configuration provided by the present invention
  • FIG. 1 Schematic diagram of the VBC control box
  • FIG. 3 Schematic diagram of the Lvds data stream format inside the VBC control box
  • smab represents the bth bit of the a sm data frame.
  • the VBC control box hardware adopts two power supply boards, two central processing boards, and ten interface boards. All boards transmit voltage and signals through the backplane.
  • the functions of each board are as follows:
  • Power board Convert the DC110V or DC220V power supply of the converter station to a 5V or 15V power supply to the central processing board and interface board.
  • the power board can be hot swapped, that is, in the power-on state, if the power board fails, the power board can be directly unplugged from the chassis.
  • Central Processing Board Implements valve control protection algorithms, data aggregation, and data communication functions.
  • Interface board Realize data aggregation and pre-processing, data communication function of flexible DC converter valve sub-module.
  • the interface board is equipped with a fiber optic transceiver, a fiber optic transmitter, and an LED display.
  • Backplane Provides power and signal transmission channels.
  • the number of interface boards can be adjusted according to the number of sub-modules in the lower stage.
  • the number of optical transmitters and optical receivers on each interface board can also be adjusted according to the number of sub-modules.
  • two central processing boards and 10 interface boards transmit data through the backplane, Lvds data bus and peer clock line.
  • VBC adopts dual central processing board (master and slave) design, and each interface board adopts 1 The data transmission mode of the root clock line 2 data bus.
  • Each central processing board exchanges data with the interface board through 60 pairs of wires, and each interface board carries out data interaction with the main central processing board through 6 pairs of wires (3 pairs of receiving, 3 pairs of transmissions, transmitting ds signals).
  • Each interface board passes 6 pairs of wires (3 pairs, 3 pairs, transmission lvds signal) and data interaction from the central processing board.
  • Each interface board interfaces with 6 flexible DC converter valve submodules, 10 blocks. A total of 60 sub-modules are triggered and monitored.
  • the synchronous serial bit rate is 12 Mbps
  • the asynchronous serial should be 4 Mbps, that is, after receiving the first bit and the serial data.
  • the interface board and the SM can start Heterogeneous serial communication, in which the parity bit in the isochronous serial is added to the FPGA of the interface board, and the high bit is transmitted after the high bit. In this way, the rate of serial communication is improved under the premise of making full use of channel resources.
  • the number of data buses can be flexibly selected according to the number of devices under the interface board.
  • sm ab represents the bth bit of the a sm data frame.
  • smOO represents the highest-order data bit of the transmission frame of the 0th sm.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Programmable Controllers (AREA)
  • Bus Control (AREA)
  • Rectifiers (AREA)

Description

—种模块化多电平柔性直流输电阀基控制设备 技术领域：
本发明涉及电力系统的电力电子直流输电领域， 具体涉及一种模块化多电平柔性直 流输电阀基控制设备机箱设计。 . 背景技术：
柔性直流输电是采用直流作为中介的一种新的输电方式， 采用基于可关断型器件的 电压源型换流器和先进调制技术进行直流输电， 是交流电网的有益补充， 可以在实现电 力输送的同时， 提高现有交流输电系统的输送能力和稳定性， 使现有交流输电系统得到 更有效的利用。 模块化多电平换流器由多个子模块串联组成， 其子模块由旁路幵关、 晶 闸管、 IGBT、 二极管和电容构成。 模块化多电平换流器需要根据电容电压及子模块工作 状态对单独的子模块进行不同的实时投切控制， 电平数越多， 实时控制周期越短， 电容 电压平衡控制越难实现。 同时， 由于子模块除了 IGBT, 还有保护晶闸管、 旁路开关等组 件， 而传统直流输电阀基电子设备仅为执行机构， 除了阀监视及保护功能， 不具备对不 同子模块的实时控制能力， 已经不能满足模块化柔性直流输电阀的控制保护要求， 所以 需要一种具有实时控制保护功能的设备满足模块化多电平柔性直流输电的要求。
本发明中的阀控单元作为模块化多电平柔性直流输电控制保护系统和子模块控制 器之间的接口设备， 可以完成模块化多电平柔性直流阀的实时控制及保护功能。 发明内容：
针对现有技术的不足， 本发明所要解决的技术问题是设计一种阀基控制设备， 以适 应不同柔性直流输电容量等级的需要。
本发明提供的一种模块化多电平柔性直流输电阀基控制设备，所述设备包括电源板、 接口板、 背板和中央处理板； 其改进之处在于， 所述接口板和所述电源板设于中央处理 板两侧： 所述中央处理板、 所述接口板和所述电源板设在所述背板上。
本发明提供的第一优选方案的阀基控制设备， 其改进之处在于， 所述中央处理板为 并列在一起的两块中央处理板。
本发明提供的第二优选方案的阀基控制设备， 其改进之处在于， 所述电源板设有两 块， 设于所述背板的最外侧。 本发明提供的第三优选方案的阀基控制设备， 其改进之处在于， 所述接口板的数量 大于一， 每个所述接口板上设有光接收器和光发送器， 并且所述接口板与柔性直流换流 阀子模块控制单元连接。
本发明提供的第四优选方案的阀基控制设备， 其改进之处在于， 所述中央处理板与 所述背板设置 60对导线； 所述背板与所述接口板之间设置 12对导线。 其中一对导线是 指 2根导线。
本发明提供的第五优选方案的阀基控制设备， 其改进之处在于， 所述接口板与所述 子模块控制 SMC单元之间通过 6对收发光纤连接。 其中一对光纤是指 2根光纤。
本发明提供的较优选方案的阀基控制设备，其改进之处在于，所述电源板设有两块， 设于所述背板的最外侧。
本发明提供的另一优选方案的阀基控制设备， 其改进之处在于， 所述接口板的数量 大于一， 每个所述接口板上设有光接收器和光发送器， 并且所述接口板与柔性直流换流 阀子模块控制单元 SMC连接。
与现有技术比， 本发明的有益效果为：
本发明采取统一的硬件结构设计， 使得阀基控制设备 VBC中电流控制单元及桥臂控 制单元可以灵活组合， 满足不同柔性直流输电工程的需求；
本发明采取双中央处理板的设计思路， 确保了实时运算的可靠性；
本发明在每个接口板进行数据的预处理， 对回报的电容电压进行优先排序， 最终将 并行数据简化为有效的串行数据上传中央处'理板。
本发明将每个接口板负责子模块的回报信息进行预处理后简化成一帧数据上传中 央处理板， 保留的有效信息， 大大缩短了中央处理板对回报信息的传输及处理时间。
本发明的子模块控制命令实时传送给接口板， 背板通信速率可到百兆以上， 低压差 分技术 Lvds数据总线和时钟总线同时使用在大大提高数据传输速率的同时， 也确保的 传输数据的同歩性；
双中央处理板设计和可供选择的接口板卡设计， 提高了数据传输的可靠性， 扩展性 好；
接口板首先进行数据预处理后将有效数据上传中央处理板，大大提高了中央处理板 运算效率；
双电源板的设计提高了供电可靠性， 并可以带电检修， 实现热插拔。 附图说明 图 1 .· ·本发明提供的 VBC机箱配置示意图；
图 2 : VBC控制箱原理图；
图 3： VBC控制箱内部 Lvds数据流格式示意图；
其中， smab代表第 a个 sm数据帧的第 b位。 具体实施方式
下面结合附图对本发明的具体实施方式作进一步的详细说明。
图 1中， VBC控制箱硬件采取 2块电源板、 2块中央处理板、 10块接口板的配置方 式， 所有板卡通过背板进行电压及信号的传递。 各板卡功能如下：
电源板： 将换流站 DC110V或 DC220V电源转换为 5V或 15V电源供给中央处理板及 接口板。 其中， 电源板可热插拔， 即在通电状态下， 电源板如果出现故障， 可直接将电 源板从机箱中拔掉。
中央处理板： 实现阀控制保护算法， 数据汇总、 数据通信功能。
接口板： 实现柔性直流换流阀子模块数据汇总及预处理， 数据通信功能。 接口板上 设有光纤收发器、 光纤发送器和 LED显示灯。
背板： 提供电源及信号传递的通道。
其中， 接口板数量可根据下级子模块数量进行适当调整， 每块接口板上的光发送器 和光接收器数量也可以根据子模块数量进行适当调整。
图 2中， 两块中央处理板与 10块接口板通过背板、 Lvds数据总线和同歩时钟线进 行数据传输， VBC采取双中央处理板 （主、 从） 设计， 与每块接口板采取 1根时钟线 2 根数据总线的数据传输方式。 每块中央处理板分别通过 60对导线经背板与接口板进行 数据交互， 每块接口板分别通过 6对导线 （3对收， 3对发， 传输 ds信号） 与主中央 处理板进行数据交互， 每块接口板分别通过 6对导线（3对收， 3对发， 传输 lvds信号） 与从中央处理板进行数据交互，每块接口板与 6个柔性直流换流阀子模块接口， 10块共 负责 60个子模块的触发及监控。
图 3中，接口板将 6个柔性直流换流阀子模块 SM0~SM5(SM， sub-module,子模块) 的数据预处理为两帧有效数据后， 采用两条数据总线将信号传到子模块控制器 SMC单 元然后将反馈信号反馈回中央处理板， 一路用于同步时钟， 另外两路各负责 3路 SM信 息的发送， 其中一条负责子模块 SM0 SM2 , 另一条负责子模块 SM3~SM5， 且同步串 行发送波特率是异歩串行发送比特率的 3倍， 如同步串行比特率 12Mbps， 异步串行应 为为 4Mbps， 即在接收到第一个比特同歩串行数据之后， 接口板与 SM之间即可以开始 异歩串行通信， 其中异歩串行中的校验位是在接口板的 FPGA中加入的， 发送时高位在 前低位在后。 这样， 在充分利用信道资源的前提下提高了串行通信的速率， 实际设计中 可以根据接口板下级设备的数量灵活选择数据总线的数量。 其中， sm ab代表第 a个 sm 数据帧的第 b位。 如 smOO代表第 0号 sm的发送帧的最高位数据位。
最后应该说明的是： 结合上述实施例仅说明本发明的技术方案而非对其限制。 所属 领域的普通技术人员应当理解到： 本领域技术人员可以对本发明的具体实施方式进行修 改或者等同替换， 但这些修改或变更均在申请待批的权利要求保护范围之中。

Claims

权 利 要 求
1.一种模块化多电平柔性直流输电阀基控制设备， 所述设备包括电源板、 接口板、 背板和中央处理板； 其特征在于， 将所述接口板和所述电源板设于中央处理板两侧； 将 所述中央处理板、 所述接口板和所述电源板设在所述背板上。
2.如权利要求 1所述的阀基控制设备， 其特征在于， 所述中央处理板为并列在一起 的两块中央处理板。
3.如权利要求 1所述的阀基控制设备， 其特征在于， 所述电源板设有两块， 设于所 述背板的最外侧。
4.如权利要求 1所述的阀基控制设备， 其特征在于， 所述接口板的数量大于一， 每 个所述接口板上设有光接收器和光发送器， 并且所述接口板与柔性直流换流阀子模块控 制单元连接。
5.如权利要求 1所述的阀基控制设备， 其特征在于， 所述中央处理板与所述背板设 置 60对导线； 所述背板与所述接口板之间设置 12对导线。
6.如权利要求 1所述的阀基控制设备， 其特征在于， 所述接口板与所述子模块控制 SMC单元之间通过 6对光纤连接。
7.如权利要求 2所述的阀基控制设备， 其特征在于， 所述电源板设有两块， 设于所 述背板的最外侧。
8.如权利要求 3所述的阔基控制设备， 其特征在于， 所述接口板的数量大于一， 每 个所述接口板上设有光接收器和光发送器， 并且所述接口板与柔性直流换流阀子模块控 制单元连接。
PCT/CN2011/001815 2011-03-16 2011-10-31 一种模块化多电平柔性直流输电阀基控制设备 WO2012122689A1 (zh)

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