WO2015081883A1 - 一种适用于大容量mmc柔性直流输电的阀监视系统 - Google Patents

一种适用于大容量mmc柔性直流输电的阀监视系统 Download PDF

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WO2015081883A1
WO2015081883A1 PCT/CN2014/093111 CN2014093111W WO2015081883A1 WO 2015081883 A1 WO2015081883 A1 WO 2015081883A1 CN 2014093111 W CN2014093111 W CN 2014093111W WO 2015081883 A1 WO2015081883 A1 WO 2015081883A1
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event
valve
information
monitoring system
control device
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PCT/CN2014/093111
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English (en)
French (fr)
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贺之渊
路建良
王韧秋
谢敏华
杨兵建
高阳
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国家电网公司
国网智能电网研究院
中电普瑞电力工程有限公司
国网辽宁省电力有限公司大连供电公司
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Publication of WO2015081883A1 publication Critical patent/WO2015081883A1/zh

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems

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  • the invention relates to a monitoring system in the field of flexible direct current transmission, in particular to a valve monitoring system (Valve Monitor, referred to as VM system) suitable for large-capacity MMC flexible direct current transmission.
  • VM system valve monitoring system
  • the NOG SOE event will be generated according to the working state of the sub-module during startup and operation; at the same time, the valve control device of the converter valve will also generate SOE according to its fault state.
  • the valve control device of the converter valve In order to observe the capacitor voltage balance effect of the sub-module, it is necessary to monitor the maximum and minimum capacitance voltages of the sub-modules in each bridge arm in real time; in order to analyze the capacitance voltage balance effect offline, it is necessary to record the capacitance voltage of some fixed sub-modules. Based on the above considerations, a powerful converter valve monitoring system is a necessary choice.
  • MMC flexible DC transmission converter valve and valve base controller are the core and key equipment of flexible DC transmission. Real-time monitoring of its operating status, timely and accurate acquisition of fault information and repair in case of failure, is not only the system requirements for the device, It is also the requirement of the protection device itself, and the feasibility and reliability of the valve monitoring system are of utmost importance. However, the design of the valve monitoring system for large-capacity MMC flexible DC transmission has not been found at home and abroad.
  • the object of the present invention is to provide a valve monitoring system suitable for large-capacity MMC flexible direct current transmission.
  • the invention eliminates the event source level, unifies the time scale, and simplifies the event transmission path through a unified state detecting mechanism.
  • To enhance the caching ability of instantaneous large-scale events improve the storage query and real-time display capability of the upper computer background, and establish a standard interface with the background.
  • the overall guarantee valve and VBC body events are accurate, timely reported, reliable, and easy to query. Solve the problems of missing events, disordered sequences, etc. in the above projects.
  • the present invention provides a valve monitoring system suitable for high-capacity MMC flexible direct current transmission, the valve monitoring system being coupled to a valve-based control device of a converter valve, the improvement being that the system is based on a layered design.
  • the system includes an A system and a B system that are mutually redundant, and the A system and the B system are both connected to the host computer background PC through the Gigabit Ethernet, and the A system and the B system both include an event generating unit and event forwarding.
  • the unit, the event generating unit and the event forwarding unit are connected by an optical fiber.
  • the event generating unit and the valve base control device are connected by an optical fiber, and transmit information with the valve base control device at a rate of 10 MBps using an IEC60044-8 communication protocol.
  • the event generating unit is constituted by an event generating chassis working in parallel, and each event generating chassis includes a first signal receiving and conditioning circuit, a DSP and an FPGA dual-core processor and photoelectric conversion sequentially connected in sequence.
  • a circuit, the first signal receiving conditioning circuit is at least one; an FPGA is used for communication information management, and a DSP is used for data information processing;
  • the first signal receiving conditioning circuit includes a sampling card, a filter, an AD converter, and a power amplifier that are sequentially connected;
  • the photoelectric conversion circuit includes a photodiode and an operational amplifier that are sequentially connected.
  • the information processing comprises two parts: (1) generating a corresponding SOE event according to a displacement condition of the SOE status bit of the converter valve submodule and the valve base control device uploaded by the valve base control device; 2 Receiving the required sub-module capacitance voltage uploaded by the valve-based control device, and performing the information conditioning on the uploaded information, and then uploading it to the event forwarding unit.
  • the event forwarding unit is connected to the event generating unit through an optical fiber, and transmits information according to an IEC60044-8 communication protocol and the event generating unit according to a rate of 10 MBps.
  • the event forwarding unit includes a second signal receiving and conditioning circuit, a PowerPC and an FPGA dual-core processor and an Ethernet control chip which are sequentially connected;
  • the second signal receiving conditioning circuit includes a sampling card, a filter, an AD converter and a power amplifier connected in sequence;
  • the FPGA manages communication information transmitted from the optical fiber, and the PowerPC is used for data buffering, communication protocol conversion, and Ethernet communication management.
  • the information processing of the event forwarding unit includes three parts: (1) receiving SOE information and voltage information transmitted by a plurality of lower event generating units, and performing SOE information and voltage information. Analyze and cache; (2) Receive the recording command of the PC of the host computer, and record the SOE information and voltage information after parsing to generate a recording file; (3) Record the file at the end It is converted to TCP/IP protocol and uploaded to the PC of the host computer through Gigabit Ethernet.
  • the PC of the host computer is designed based on the PowerSys6000 power dispatching automation system, adopts the MYSQL database, has a data storage capacity of 100,000 points, and has a data expansion capability of 500,000 points.
  • the invention provides a valve monitoring system suitable for large-capacity MMC flexible direct current transmission, which satisfies the needs of the power system for monitoring the flexible direct current transmission converter valve and the valve-based control device, and has large data throughput and fast processing speed, especially Applicable to large-capacity MMC flexible DC transmission system; Moreover, the modular design of the chassis, the board-level functional unit, convenient maintenance and overhaul, and good portability; at the same time, the redundant design can guarantee all the converter valves and valve bases well. Control equipment monitoring; Furthermore, the valve monitoring system layered design, and the logical relationship between the entire control protection system is clear, easy to design and link the entire control protection system.
  • the invention adopts a unified state detecting mechanism, eliminates the event source level, unifies the time stamp, simplifies the event transmission path, strengthens the buffering capability of the instantaneous large number of events, improves the storage query and real-time display capability of the PC on the background of the host computer, establishes and backstage Standard interface.
  • the overall guarantee valve and VBC body events are accurate, timely reported, reliable, and easy to query. Solve the problems of missing events, disordered sequences, etc. in the above projects.
  • FIG. 1 is a schematic structural view of a valve monitoring system suitable for a large-capacity MMC flexible direct current transmission provided by the present invention
  • FIG. 2 is a schematic diagram showing the functional structure of an event generating unit provided by the present invention.
  • FIG. 3 is a schematic diagram showing the functional structure of an event forwarding unit provided by the present invention.
  • the utility model provides a schematic diagram of a monitoring system for a large-capacity MMC flexible DC transmission valve, as shown in FIG. 1 , which is suitable for connecting a valve monitoring system of a large-capacity MMC flexible direct current transmission with a valve-based control device of a converter valve, including mutual Redundant A system and B system, both A system and B system are connected to the host computer background PC through Gigabit Ethernet, and both the A system and the B system include an event generating unit and an event forwarding unit.
  • the event generating unit and the event forwarding unit are connected by an optical fiber.
  • the event generating unit and the valve-based control device are optically-mediated and transmit information at a rate of 10 MBps using an IEC 60044-8 communication protocol.
  • the event generating unit is composed of an event generating chassis working in parallel, each event generating chassis includes a first signal receiving and conditioning circuit, a DSP and an FPGA dual core processor and a photoelectric conversion circuit, which are sequentially connected, and the first signal receiving and conditioning circuit is at least One; FPGA is used for communication information management, and DSP is used for data information processing;
  • the first signal receiving conditioning circuit includes a sampling card, a filter, an AD converter, and a power amplifier that are sequentially connected;
  • the photoelectric conversion circuit includes a photodiode and an operational amplifier that are sequentially connected.
  • the event generation unit runs in parallel, and the information processing mainly comprises two parts: 1 according to the displacement condition of the converter valve sub-module and the valve-based control device SOE status bit uploaded by the valve-based control device, generating a corresponding SOE event; 2 receiving the valve-based control device
  • the required sub-module capacitor voltage is uploaded, summarized after information conditioning, and uploaded to the event forwarding unit.
  • the event forwarding unit and the event generating unit transmit information according to an optical fiber medium, adopt an IEC60044-8 communication protocol, and transmit at a rate of 10 MBps.
  • the event forwarding unit includes a second signal receiving conditioning circuit, a PowerPC and an FPGA dual-core processor and an Ethernet control chip connected in sequence;
  • the second signal receiving and conditioning circuit includes a sampling card, a filter, an AD converter and a serial connection.
  • Power amplifier the FPGA manages communication information transmitted from the optical fiber, and the PowerPC is used for data buffering, communication protocol conversion, and Ethernet communication management.
  • the event forwarding unit information processing mainly includes three parts: (1) receiving SOE information and voltage information transmitted by a plurality of lower level event generating units, and performing parsing and buffering; (2) receiving a recording command of the PC of the upper computer and performing background recording. Recording operation; (3) Finally, the information is converted into TCP/IP protocol, and uploaded to the host computer background PC through Gigabit Ethernet.
  • the PC of the host computer is based on the PowerSys6000 power dispatching automation system design, adopts MYSQL database, has 100,000 points of data caching capability, and has 500,000 points of data expansion capability.
  • a monitoring system for high capacity MMC flexible direct current transmission is further described by the following embodiments.
  • the valve monitoring system for large-capacity MMC flexible DC transmission is based on a layered design.
  • Multiple event generation units work in parallel, according to the converter valve and valve-based control equipment uploaded by the valve-based control equipment.
  • the displacement information of the barrier information bit generates a corresponding SOE event, receives the uploaded capacitor voltage information of the sub-module for parsing and summarizing, and uploads the above information to the event forwarding unit through the optical fiber; the event forwarding unit caches and converts the SOE event and the voltage information.
  • the TCP/IP protocol it is uploaded to the PC of the host computer through Gigabit Ethernet for real-time display. At the same time, it receives the recording command sent by the PC on the background of the host computer to perform the recording operation, and uploads the recorded file to the background PC of the host computer for resolution. storage.
  • composition of the valve monitoring system mainly includes the following links:
  • the hardware architecture combined with DSP and FPGA is used to control the uploaded information through the fiber receiving valve base, and the displacement information of the converter valve and the valve base control device is generated according to the displacement of the valve-based control device.
  • the SOE event receives the uploaded capacitor voltage information of the sub-module for parsing and summarizing, and uploads the above information to the event forwarding unit through the optical fiber.
  • Event forwarding unit
  • the unit uses a hardware architecture combining PowerPC and FPGA. It accepts the SOE event and voltage information uploaded by the event generation unit for caching, converts it to TCP/IP protocol, and uploads it to the host computer background PC through Gigabit Ethernet. Real-time display, simultaneous receiving the recording command issued by the PC on the background of the host computer to perform the recording operation, and uploading the recorded wave file to the background PC of the upper computer for parsing and storage.
  • valve monitoring system Due to the redundant design of the VBC chassis and the reliability of the system, the valve monitoring system also considers the redundancy: designing the event generation unit + event forwarding unit of the two systems A and B, respectively generating SOE and processing sub-module capacitance Voltage information to ensure reliability of the monitoring of the converter valve and valve-based control equipment.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

一种适用于大容量MMC柔性直流输电的阀监视系统（Valve Monitor，简称VM系统），包括：事件生成单元、事件转发单元及上位机后台PC。所提供的阀监视系统，采取各单元机箱平行事件并行处理，最终统一平台集中处理的原则，同时在事件处理底层打入GPS时标。通过统一的状态检测机构，消除事件源级别，统一时标，简化事件传递路径，加强瞬时大量事件的缓存能力，提高上位机后台的存储查询和实时显示的能力，建立与后台标准接口。总体保证阀及VBC本体事件，生成准确、上报及时、存储可靠、查询方便。解决工程中所出现的事件丢失，顺序混乱等诸多问题。

Description

一种适用于大容量MMC柔性直流输电的阀监视系统 技术领域
本发明涉及柔性直流输电领域的监视系统，具体涉及一种适用于大容量MMC柔性直流输电的阀监视系统(Valve Monitor，简称VM系统)。
背景技术
对于模块数量极大的MMC柔性直流输电换流阀，在启动、运行过程中会根据子模块工作状态生成诺干SOE事件；与此同时，换流阀阀控设备也会根据其故障状态产生SOE事件；为了观察子模块电容电压平衡效果，需要实时监控各桥臂内子模块电容电压最大、最小值；为了对电容电压平衡效果进行离线分析，需要对部分固定子模块的电容电压进行录波。基于上述考虑，功能强大的换流阀阀监视系统成为必要选择。
MMC柔性直流输电换流阀与阀基控制器作为柔性直流输电的核心、关键设备，实时监控其运行状态，在故障情况下及时、准确获取故障信息进而进行修复，不仅是系统对装置的要求，更是保护装置自身的要求，阀监视系统的可行性与可靠性至关重要。但国内外目前未发现针对大容量MMC柔性直流输电的阀监视系统的设计方案。
发明内容
针对现有技术的不足，本发明的目的是提供一种适用于大容量MMC柔性直流输电的阀监视系统，本发明通过统一的状态检测机构，消除事件源级别，统一时标，简化事件传递路径，加强瞬时大量事件的缓存能力，提高上位机后台的存储查询和实时显示的能力，建立与后台标准接口。总体保证阀及VBC本体事件，生成准确、上报及时、存储可靠、查询方便。解决上述工程中所出现的事件丢失，顺序混乱等诸多问题。
本发明的目的是采用下述技术方案实现的：
本发明提供一种适用于大容量MMC柔性直流输电的阀监视系统，所述阀监视系统与换流阀的阀基控制设备连接，其改进之处在于，所述系统基于分层设计， 所述系统包括互为冗余的A系统和B系统，所述A系统和B系统均通过千兆以太网与上位机后台PC连接，所述A系统和B系统均包括事件生成单元和事件转发单元，所述事件生成单元和事件转发单元通过光纤连接。
本发明提供的一种优选技术方案中，所述事件生成单元与阀基控制设备通过光纤连接，并采用IEC60044-8通信协议、按照10MBps的速率与阀基控制设备传输信息。
本发明提供的第二优选技术方案中，所述事件生成单元由并行工作的事件生成机箱构成，每个事件生成机箱包括依次连接的第一信号接收调理电路、DSP和FPGA双核处理器和光电转换电路，所述第一信号接收调理电路至少一个；FPGA用于通信信息管理，DSP用于数据信息处理；
所述第一信号接收调理电路包括依次连接的采集卡、滤波器、AD转换器和功率放大器；所述光电转换电路包括依次连接的光电二极管和运算放大器。
本发明提供的第三优选技术方案中，所述信息处理包括两部分：①根据阀基控制设备上传的换流阀子模块与阀基控制设备SOE状态位的变位情况，生成相应SOE事件；②接收阀基控制设备上传的所需子模块电容电压，将上传的信息进行信息调理后汇总，上传给所述事件转发单元。
本发明提供的第四优选技术方案中，所述事件转发单元通过光纤与事件生成单元连接，并采用IEC60044-8通信协议、按照10MBps的速率与事件生成单元传输信息。
本发明提供的第五优选技术方案中，所述事件转发单元包括依次连接的第二信号接收调理电路、PowerPC和FPGA双核处理器和以太网控制芯片；
所述第二信号接收调理电路包括依次连接的采集卡、滤波器、AD转换器和功率放大器；
所述FPGA对光纤传来的通信信息进行管理，PowerPC用于数据的缓存、通信协议的转换及以太网通信的管理。
本发明提供的第六优选技术方案中，所述事件转发单元的信息处理包括三部分：(1)接收多个下级事件生成单元传递来的SOE信息及电压信息，并对SOE信息及电压信息进行解析与缓存；(2)接收上位机后台PC的录波命令，并对解析后的SOE信息及电压信息进行录波操作，生成录波文件；(3)最后将录波文件 转换为TCP/IP协议，通过千兆以太网上传至上位机后台PC。
本发明提供的第七优选技术方案中，所述上位机后台PC基于PowerSys6000电力调度自动化系统设计，采用MYSQL数据库，具备10万点数据缓存能力，并具备50万点数据扩展能力。
与现有技术比，本发明达到的有益效果是：
1、本发明提供的一种适用于大容量MMC柔性直流输电的阀监视系统，满足电力系统对柔性直流输电换流阀和阀基控制设备监视的需要，数据吞吐量大，处理速度快，尤其适用于大容量MMC柔性直流输电系统；而且，机箱模块化设计，板卡级功能单元，维护与检修方便，可移植性好；同时，冗余化设计，能良好保证全部换流阀与阀基控制设备的监视；再者，阀监视系统分层设计，与整个控制保护系统间逻辑关系清晰，易于整个控制保护系统的设计与联系。
2、本发明通过统一的状态检测机构，消除事件源级别，统一时标，简化事件传递路径，加强瞬时大量事件的缓存能力，提高上位机后台PC的存储查询和实时显示的能力，建立与后台标准接口。总体保证阀及VBC本体事件，生成准确、上报及时、存储可靠、查询方便。解决上述工程中所出现的事件丢失，顺序混乱等诸多问题。
附图说明
图1是本发明提供的适用于大容量MMC柔性直流输电的阀监视系统结构示意图；
图2是本发明提供的事件生成单元功能结构示意图；
图3是本发明提供的事件转发单元功能结构示意图。
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。
本发明提供的一种适用于大容量MMC柔性直流输电阀监视系统示意图如图1所示，适用于大容量MMC柔性直流输电的阀监视系统与换流阀的阀基控制设备连接，包括互为冗余的A系统和B系统，A系统和B系统均通过千兆以太网与上位机后台PC连接，所述A系统和B系统均包括事件生成单元和事件转发单元，所 述事件生成单元和事件转发单元通过光纤连接。
所述事件生成单元与阀基控制设备间以光纤为媒介、并采用IEC60044-8通信协议、按照10MBps的速率传输信息。
所述事件生成单元由并行工作的事件生成机箱构成，每个事件生成机箱包括依次连接的第一信号接收调理电路、DSP和FPGA双核处理器和光电转换电路，所述第一信号接收调理电路至少一个；FPGA用于通信信息管理，DSP用于数据信息处理；
所述第一信号接收调理电路包括依次连接的采集卡、滤波器、AD转换器和功率放大器；所述光电转换电路包括依次连接的光电二极管和运算放大器。
事件生成单元并行运行，信息处理主要包括两部分：①根据阀基控制设备上传的换流阀子模块与阀基控制设备SOE状态位的变位情况，生成相应SOE事件；②接收阀基控制设备上传的所需子模块电容电压，进行信息调理后汇总，上传给所述事件转发单元。
所述事件转发单元与事件生成单元间以光纤为媒介、采用IEC60044-8通信协议、按照10MBps的速率传输信息。
所述事件转发单元包括依次连接的第二信号接收调理电路、PowerPC和FPGA双核处理器和以太网控制芯片；所述第二信号接收调理电路包括依次连接的采集卡、滤波器、AD转换器和功率放大器；所述FPGA对光纤传来的通信信息进行管理，PowerPC用于数据的缓存、通信协议的转换及以太网通信的管理。
所述事件转发单元信息处理主要包括三部分：(1)接收多个下级事件生成单元传递来的SOE信息及电压信息，并进行解析与缓存；(2)接收上位机后台PC的录波命令进行录波操作；(3)最后将信息转换为TCP/IP协议，通过千兆以太网上传至上位机后台PC。
所述上位机后台PC基于PowerSys6000电力调度自动化系统设计，采用MYSQL数据库，具备10万点数据缓存能力，并具备50万点数据扩展能力。
实施例
通过以下实施例对用于大容量MMC柔性直流输电的监视系统做进一步描述。
如图1所示，适用于大容量MMC柔性直流输电的阀监视系统基于分层设计，多个事件生成单元并行工作，根据阀基控制设备上传的换流阀与阀基控制设备故 障信息位的变位情况生成相应的SOE事件，接收上传的子模块电容电压信息进行解析与汇总，将上述信息通过光纤上传至事件转发单元；事件转发单元将SOE事件与电压信息进行缓存，转换为TCP/IP协议，通过千兆以太网上传至上位机后台PC实时显示，同时接收上位机后台PC下发的录波命令执行录波操作，并将录波文件上传至上位机后台PC解析与存储。
阀监视系统的构成主要包括以下几个环节：
事件生成单元：
如图2所示，采用DSP和FPGA相结合的硬件架构，通过光纤接收阀基控制上传的信息，根据阀基控制设备上传的换流阀与阀基控制设备故障信息位的变位情况生成相应的SOE事件，接收上传的子模块电容电压信息进行解析与汇总，将上述信息通过光纤上传至事件转发单元。
事件转发单元：
如图3所示，该单元采用PowerPC和FPGA相结合的硬件架构，接受事件生成单元上传的SOE事件与电压信息进行缓存，转换为TCP/IP协议，通过千兆以太网上传至上位机后台PC实时显示，同时接收上位机后台PC下发的录波命令执行录波操作，并将录波文件上传至上位机后台PC解析与存储。
机箱冗余设计：
由于VBC机箱实行冗余设计，同时为保证系统可靠性，阀监视系统也进行冗余方面的考虑：设计A、B两个系统的事件生成单元+事件转发单元，分别生成SOE、处理子模块电容电压信息，从而保证换流阀和阀基控制设备监视的可靠性。
最后应当说明的是：以上实施例仅用以说明本发明的技术方案而非对其限制，尽管参照上述实施例对本发明进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本发明的具体实施方式进行修改或者等同替换，而未脱离本发明精神和范围的任何修改或者等同替换，其均应涵盖在本发明的权利要求范围当中。

Claims (8)

  1. 一种适用于大容量MMC柔性直流输电的阀监视系统，所述阀监视系统与换流阀的阀基控制设备连接，其特征在于，所述系统基于分层设计，所述系统包括互为冗余的A系统和B系统，所述A系统和B系统均通过千兆以太网与上位机后台PC连接，所述A系统和B系统均包括事件生成单元和事件转发单元，所述事件生成单元和事件转发单元通过光纤连接。
  2. 如权利要求1所述的阀监视系统，其特征在于，所述事件生成单元与阀基控制设备通过光纤连接，并采用IEC60044-8通信协议、按照10MBps的速率与阀基控制设备传输信息。
  3. 如权利要求2所述的阀监视系统，其特征在于，所述事件生成单元由并行工作的事件生成机箱构成，每个事件生成机箱包括依次连接的第一信号接收调理电路、DSP和FPGA双核处理器和光电转换电路，所述第一信号接收调理电路至少一个；FPGA用于通信信息管理，DSP用于数据信息处理；
    所述第一信号接收调理电路包括依次连接的采集卡、滤波器、AD转换器和功率放大器；所述光电转换电路包括依次连接的光电二极管和运算放大器。
  4. 如权利要求3所述的阀监视系统，其特征在于，所述信息处理包括两部分：①根据阀基控制设备上传的换流阀子模块与阀基控制设备SOE状态位的变位情况，生成相应SOE事件；②接收阀基控制设备上传的所需子模块电容电压，将上传的信息进行信息调理后汇总，上传给所述事件转发单元。
  5. 如权利要求1所述的阀监视系统，其特征在于，所述事件转发单元通过光纤与事件生成单元连接，并采用IEC60044-8通信协议、按照10MBps的速率与事件生成单元传输信息。
  6. 如权利要求5所述的阀监视系统，其特征在于，所述事件转发单元包括依次连接的第二信号接收调理电路、PowerPC和FPGA双核处理器和以太网控制芯片；
    所述第二信号接收调理电路包括依次连接的采集卡、滤波器、AD转换器和功率放大器；
    所述FPGA对光纤传来的通信信息进行管理，PowerPC用于数据的缓存、通信协议的转换及以太网通信的管理。
  7. 如权利要求6所述的阀监视系统，其特征在于，所述事件转发单元的信息处理包括三部分：(1)接收多个下级事件生成单元传递来的SOE信息及电压信息，并对SOE信息及电压信息进行解析与缓存；(2)接收上位机后台PC的录波命令，并对解析后的SOE信息及电压信息进行录波操作，生成录波文件；(3)最后将录波文件转换为TCP/IP协议，通过千兆以太网上传至上位机后台PC。
  8. 如权利要求1所述的阀监视系统，其特征在于，所述上位机后台PC基于PowerSys6000电力调度自动化系统设计，采用MYSQL数据库，具备10万点数据缓存能力，并具备50万点数据扩展能力。
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