CN110365102A - A monitoring system and monitoring method for high-voltage direct current circuit breaker - Google Patents

Abstract

The invention relates to a monitoring system and a monitoring method for a high-voltage direct current circuit breaker, comprising an upper computer PC device and a lower computer monitoring device, wherein the lower computer monitoring device includes at least one circuit breaker monitoring unit; the circuit breaker monitoring unit is used for receiving high voltage direct current The analog information and status information bits of the circuit breaker, the state information bits are used to generate corresponding SOE event information according to the displacement situation, and the analog information and SOE event information are time stamped, stored in the event buffer to wait for sending, and the analog The information is used as a remote measurement, and the status information bit is sent to the host computer PC device through the standard Ethernet interface as a remote signal value for display; the host computer PC device is used to check the status of the analog information to be sent and the SOE event buffer, and store it according to the entry. The sequence of zones sends time-stamped analog information and SOE event information. The invention can monitor the state and information of the circuit breaker in real time, obtain the fault information timely and accurately in the fault state, and analyze and repair the fault mechanism.

Description

A monitoring system and monitoring method for high-voltage direct current circuit breaker

technical field

The invention relates to a monitoring technology for a DC circuit breaker, in particular to a monitoring system and a monitoring method for a high-voltage DC circuit breaker.

Background technique

HVDC circuit breakers ensure the reliability, flexibility and continuity of multi-terminal HVDC transmission. As the core and key equipment of HVDC transmission, the information of HVDC circuit breakers needs to be monitored in real time. Accurately obtaining circuit breaker operating status information and fault information under fault conditions is the requirement of the system for protection devices. The feasibility and reliability of the HVDC circuit breaker monitoring system are very important. At present, no monitoring system for HVDC circuit breaker has been found at home and abroad. design scheme.

The current high-voltage DC circuit breaker monitoring system cannot monitor the state and information of the circuit breaker, and cannot obtain fault information in a fault state, resulting in failure of the high-voltage DC circuit breaker and failure to detect problems in time.

SUMMARY OF THE INVENTION

In order to improve the feasibility of the high-voltage DC circuit breaker monitoring system, the purpose of the present invention is to provide a monitoring system for high-voltage DC circuit breakers and a monitoring method thereof. The high-voltage DC circuit breaker monitoring system is one of the key devices of the high-voltage DC circuit breaker. It can monitor the status and information of the circuit breaker in real time, obtain the fault information in a timely and accurate manner under the fault state, analyze the fault mechanism in time and then repair it, so as to ensure the safe, reliable and stable operation of the circuit breaker. requirements, but also the requirements of the circuit breaker device to protect itself.

The purpose of this invention is to adopt following technical scheme to realize:

The present invention provides a monitoring system for a high-voltage direct current circuit breaker, comprising an upper computer PC device and a lower computer monitoring device, wherein the lower computer monitoring device is connected with the high voltage direct current circuit breaker, and the improvement lies in that the lower computer monitors The equipment includes at least one circuit breaker monitoring unit; two circuit breaker monitoring units in the circuit breaker monitoring units are connected through the valve control unit of the HVDC circuit breaker;

The circuit breaker monitoring unit is used to receive the analog quantity information and the status information bit of the high-voltage DC circuit breaker, generate the corresponding SOE event information according to the displacement situation of the status information bit, and time-mark the analog quantity information and the SOE event information, Store in the event buffer and wait for sending, use the analog information as remote measurement, and send the status information bit as remote signal to the upper computer PC device for display through the standard Ethernet interface;

The upper computer PC device is used to check the state of the analog information to be sent and the SOE event buffer, and send the analog information with time stamps and the SOE event information in the order of entering the storage area.

Further, the analog quantity information includes the mechanical switch capacitor voltage value information transmitted by the HVDC circuit breaker control and protection unit, the analog quantity information of the photocurrent transformer OCT, and the sub-module voltage information transmitted by the HVDC circuit breaker valve control unit;

The status information bits include the HVDC circuit breaker control and protection unit, the mechanical switch, the valve control unit, the status information bits of the OCT and the sub-module status information bits.

Further, the circuit breaker monitoring unit includes a manual wave recording module and an automatic wave recording module; when the manual wave recording module receives the wave recording command of the upper computer PC equipment, the SOE event and the high-voltage DC circuit breaker after the analysis are analyzed. The voltage information of the sub-module performs the wave recording operation, and generates the wave recording file, converts the wave recording file into the TCP/IP protocol, and uploads it to the upper computer PC device through the Ethernet;

The automatic wave recording module is used for automatic wave recording when sensitive events are generated.

Further, the circuit breaker monitoring unit includes a GPS clock; the at least one circuit breaker monitoring unit receives the time synchronization information of the GPS clock, and uses the GPS clock as a standard clock source.

Further, the host computer PC equipment adopts an FPGA-PowerPC dual-core processor for buffering and forwarding events; the FPGA-PowerPC dual-core processor includes an FPGA and a PowerPC;

Described FPGA is used for external communication processing, status information bit displacement, accept time stamp, update status bit storage area, detect the communication state of circuit breaker monitoring unit itself, and add sub-module number, sub-module segment number;

The PowerPC is used for buffering SOE events and sending SOE events.

Further, a standard Ethernet interface is used to connect between the lower computer monitoring equipment and the upper computer PC equipment, and the lower computer monitoring equipment uploads analog quantity information, SOE event information and wave recording commands to the upper computer PC equipment through different threads .

The present invention also provides a monitoring method for the high-voltage direct current circuit breaker, the improvement of which is:

The circuit breaker monitoring unit receives the analog information and status information bits of the high-voltage DC circuit breaker, generates the corresponding SOE event information according to the displacement of the status information bits, and stores the event information after time stamping the analog information and SOE event information. The buffer is waiting to be sent, and the analog information is used as remote measurement, and the status information bit is sent as remote signal to the upper computer PC device for display through the standard Ethernet interface;

The PC device of the host computer is used to check the status of the analog information to be sent and the SOE event buffer, and send the analog information and SOE event information with time stamp in the order of entering the storage area;

When the upper computer monitoring equipment receives the wave recording command from the upper computer PC equipment, the manual wave recording module is used to perform wave recording operation on the parsed SOE event information and voltage information, and generate a wave recording file; sensitive events (sensitive events include control The protection unit sends an instruction to change the position or the voltage of the sub-module capacitor rises) to start the automatic wave recording module to generate the wave recording file;

Convert the recorded wave file into TCP/IP protocol and upload it to the upper computer PC device through Ethernet.

Further: the circuit breaker monitoring unit receives the analog quantity information and the status information bit of the high-voltage DC circuit breaker, generates the corresponding SOE event information according to the displacement situation, and time stamps the analog quantity information and the SOE event information. , store it in the event buffer and wait for sending, use the analog information as remote measurement, and send the status information bit as remote signal to the upper computer PC device for display through the standard Ethernet interface, including:

The circuit breaker monitoring unit receives the mechanical switch capacitor voltage value information, OCT analog information, and sub-module voltage information transmitted by the high-voltage DC circuit breaker valve control unit transmitted by the HVDC circuit breaker control and protection unit, and analyzes and records the sub-module capacitor voltage. The maximum value, the above analog information is sent to the upper computer PC device as a remote measurement through a standard Ethernet interface for display;

The circuit breaker monitoring unit receives the control protection unit, mechanical switch,

The valve control unit, OCT status information bits and sub-module status information bits, the control protection unit, mechanical switch, valve control unit, OCT status information bits and sub-module status information bits are time stamped for buffering; The status information bits received at one time are compared in turn, and the displacement is checked. If the status information bit is displaced, the corresponding SOE event will be generated, time stamped, stored in the event buffer for transmission, and the new status information will be sent. Bit storage records, the high-voltage DC circuit breaker control and protection unit, mechanical switch, valve control unit, OCT and sub-module status information are uploaded to the upper computer PC device through the standard Ethernet interface as the remote signal for display.

Further: the analog information includes the mechanical switch capacitor voltage value information transmitted by the HVDC circuit breaker control and protection unit, the analog information of the photocurrent transformer OCT, and the sub-module voltage information transmitted by the HVDC circuit breaker valve control unit;

The status information bits include the HVDC circuit breaker control and protection unit, the mechanical switch, the valve control unit, the status information bits of the OCT and the sub-module status information bits.

Further, the sub-module status information bits include:

Bypass switch triggering is allowed;

Bypass switch refuses to close;

Bypass switch closed;

Bypass switch points;

Submodule overvoltage fault;

Valve control unit -> sub-module communication bit error rate exceeding the standard fault;

Valve control unit -> sub-module optical channel failure;

drive failure;

Early warning of power supply failure;

The power supply itself is faulty;

The output of the power supply is faulty;

Power input failure;

Abnormal residual pressure failure;

run mode bit;

Sub-module -> valve control unit communication error rate exceeding the standard fault;

Submodule->VCU optical channel failure.

Compared with the closest prior art, the technical solution provided by the present invention has the following excellent effects:

The high-voltage DC circuit breaker monitoring system provided by the present invention can monitor the capacitor voltage of the sub-module in real time, calculate and display the maximum value of the capacitor voltage of the sub-module, which is convenient for the operator to analyze and record the dynamic equalization effect of the sub-module in each current shutdown process; Sequence Of Event (SOE) event information of each sub-module, SOE event information of valve base control equipment and SOE event information of control and protection unit; it can monitor the capacitor voltage of sub-modules, as well as main branch current, line current, mechanical switch capacitance Voltage and other waveforms are recorded, which provides conditions for offline analysis; real-time monitoring of circuit breaker switching and operating status information can timely and accurately obtain the status information and fault degree of all components of the circuit breaker under fault conditions, as well as the overall circuit breaker. The fault information is conducive to the analysis and repair of the fault mechanism; the database record is used to realize the rapid record and historical query of SOE events.

The technical scheme provided by the present invention proposed by the present invention can monitor the state and information of the circuit breaker in real time, obtain the fault information in a timely and accurate manner in a fault state, analyze the fault mechanism in time and then repair it, so as to ensure the safe, reliable and stable operation of the circuit breaker. , which not only meets the requirements of the system for the circuit breaker device, but also meets the requirements of the circuit breaker device to protect itself.

The circuit breaker monitoring system provided by the present invention adopts FPGA+PowerPC as the core processing device, the FPGA manages the communication information transmitted from the optical fiber, the PowerPC is used for data buffering, communication protocol conversion and Ethernet management, and the work scope is clearly divided and coordinated , clear responsibility, simple and reliable design;

In the present invention, the uploading of telemetry and telemetry, the uploading of SOE events, and the uploading of recorded waves are relatively independent through the uploading modes of different threads, reduce mutual influences, improve processing efficiency, and ensure the real-time performance of the circuit breaker monitoring system;

The SOE event of the invention is accurate in generation, timely in reporting, reliable in storage, and convenient in query, provides a platform for offline data analysis and fault analysis, and ensures the reliability of the operation of the high-voltage direct current circuit breaker.

Description of drawings

FIG. 1 is a wiring diagram of the overall structure of a monitoring system for a high-voltage DC circuit breaker provided by the present invention.

Detailed ways

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

The following description and drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The examples represent only possible variations. Unless explicitly required, individual components and functions are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the invention includes the full scope of the claims, along with all available equivalents of the claims. These embodiments of the invention may be referred to herein by the term "invention," individually or collectively, for convenience only and not to automatically limit the application if more than one invention is in fact disclosed. The scope is any single invention or inventive concept.

The high-voltage DC circuit breaker monitoring system proposed by the present invention can monitor the capacitor voltage of the sub-module in real time, calculate and display the maximum value of the capacitor voltage of the sub-module, which is convenient for the operator to analyze and record the dynamic equalization effect of the sub-module in each current shutdown process; Sequence Of Event (SOE) event information of each sub-module, SOE event information of valve base control equipment and SOE event information of control and protection unit; it can monitor the capacitor voltage of sub-modules, as well as main branch current, line current, mechanical switch capacitance Recording of voltage, etc., provides conditions for offline analysis; real-time monitoring of circuit breaker switching and operating status information, in case of a fault, the status information and fault degree of all components of the circuit breaker can be obtained in a timely and accurate manner, as well as the overall circuit breaker. The fault information is used to analyze the fault mechanism and then repair it; the database record is used to realize the quick record and historical query of SOE events.

Example 1

The overall structure and connection diagram of the high-voltage DC circuit breaker monitoring system provided by the present invention is shown in FIG. 1, including the upper computer PC equipment and the lower computer monitoring equipment chassis connected through the switch; the lower computer monitoring equipment chassis includes the circuit breaker monitoring system A chassis and The circuit breaker monitoring system B chassis; the circuit breaker monitoring system A chassis and the circuit breaker monitoring system B chassis are connected through a valve control unit; the circuit breaker monitoring system A chassis and the circuit breaker monitoring system B chassis both receive GPS for time synchronization, All information generated by the circuit breaker monitoring system uses this GPS clock as the standard clock source.

The HVDC circuit breaker includes sub-modules, valve control units, mechanical switches, control and protection units and photocurrent transformers OCT which are connected in parallel in sequence.

Optical fiber connections are used between the sub-module of the HVDC circuit breaker and the valve control unit, between the valve control unit and the control and protection unit, between the OCT and the circuit breaker monitoring system, and between the mechanical switch and the control and protection unit, using IEC60044-8 A communication protocol that transmits information at a rate of 10MBps.

The circuit breaker monitoring system receives the voltage value of the fast switching capacitor transmitted by the control and protection unit of the HVDC circuit breaker, the analog information of the OCT, and the voltage information of the sub-module transmitted by the valve control unit of the HVDC circuit breaker, and analyzes and records the maximum value of the capacitor voltage of the sub-module. Send these analog information as remote measurement to the host computer through the standard Ethernet interface for display.

The circuit breaker monitoring system adopts the dual-core processor of FPGA+PowerPC as the core processing device, which is mainly used for buffering and forwarding events. The controller monitors the communication status of the system itself, as well as the addition of sub-module numbers and sub-module segment numbers; PowerPC is responsible for event buffering and sending events to the upper computer.

The circuit breaker monitoring system is designed with a manual wave recording module and an automatic wave recording module. When receiving the wave recording command from the upper computer, the manual wave recording module performs the wave recording operation on the analyzed SOE information and voltage information, and generates a wave recording file. , and then convert the recording file into TCP/IP protocol and upload it to the host computer through Ethernet. In addition, the generation of sensitive events will activate the automatic wave recording module.

The circuit breaker monitoring system adopts a standard Ethernet interface between the monitoring equipment chassis of the lower computer and the PC equipment of the upper computer. The uploading of telemetry and remote signals, the uploading of SOE events, and the uploading of recording waves are through different threads, which are relatively independent and reduce mutual influence. , improving the processing efficiency and ensuring the real-time performance of the circuit breaker monitoring system.

Embodiment 2

The present invention also provides a monitoring method using a monitoring system for a high-voltage direct current circuit breaker, comprising the following steps:

(1) The monitoring system receives the status information bits and sub-module status information bits of the control protection unit, mechanical switch, valve control unit, and OCT from the high-voltage DC circuit breaker, and controls the status of the protection unit, mechanical switch, valve control unit, and OCT. The information bits and sub-module status information bits are time stamped for buffering,

(2) Compare the status information bits of step (1) with the status information bits received last time in turn, and check the displacement situation. If the status information bits are displaced, a corresponding event will be generated, time stamped, and the event will be entered. The buffer is waiting to be sent, and the new information status bits are stored and recorded;

(3) The FPGA-PowerPC dual-core processor checks the status of the analog quantity to be sent and the SOE event buffer, and sends the time-stamped simulation generated by the chassis processing to the upper computer PC device in the order of entering the FPGA-PowerPC dual-core processor storage area. Quantity and SOE event information, the content of SOE event information data frame includes event time stamp and event content;

(4) The high-voltage DC circuit breaker control and protection unit, mechanical switch, valve control unit, OCT and sub-module status information are uploaded to the host computer through the standard Ethernet interface as the remote signal for display.

(5) When receiving the wave recording command from the host computer, use the manual wave recording module of the monitoring system to perform wave recording operation on the analyzed SOE event information and voltage information, and generate a wave recording file; the sensitive event starts the automatic wave recording module Generate a recording file;

(6) Convert the recorded wave file into TCP/IP protocol, and upload it to the upper computer PC device through Ethernet.

Among them: the status information of the sub-module monitored by the circuit breaker monitoring system is as follows:

Bypass switch triggering is allowed;

Bypass switch refuses to close;

Bypass switch closed;

Bypass switch points;

Submodule overvoltage fault;

Valve control unit -> sub-module communication bit error rate exceeding the standard fault;

Valve control unit -> sub-module optical channel failure;

drive failure;

Early warning of power supply failure;

The power supply itself is faulty;

The output of the power supply is faulty;

Power input failure;

Abnormal residual pressure failure;

run mode bit;

Sub-module -> valve control unit communication error rate exceeding the standard fault;

Submodule->VCU optical channel failure.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still modify or equivalently replace the specific embodiments of the present invention. , any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are all within the protection scope of the claims of the present invention for which the application is pending.

Claims (10)

1. a kind of monitoring system for high voltage DC breaker, including host computer PC equipment and slave computer supervision equipment, described Slave computer supervision equipment is connect with high voltage DC breaker, which is characterized in that the slave computer supervision equipment includes at least one Breaker monitoring unit；Pass through high voltage DC breaker between the monitoring unit of breaker two-by-two in the breaker monitoring unit Valve control unit connection；

The breaker monitoring unit is used to receive analog quantity information and the status information position of high voltage DC breaker, and state is believed It ceases position and corresponding SOE event information is generated according to displacement situation, and markers is beaten to analog quantity information and SOE event information, be stored in Event buffer etc. is to be sent, and analog quantity information is passed through standard ether as telemetering amount, using status information position as remote signalling amount Network interface is sent to host computer PC equipment and is shown；

The host computer PC equipment is used to check the state of the analog quantity information and the event buffer SOE to be sent, Target analog quantity information and SOE event information when being had according to the sequence transmission for entering memory block.

2. being used for the monitoring system of high voltage DC breaker as described in claim 1, which is characterized in that the analog quantity information Mechanical switch capacitance voltage value information, optic current transformer OCT including the transmission of high voltage DC breaker control and protection unit The submodule information of voltage that analog quantity information, high voltage DC breaker valve control unit transmit；

The status information position includes the state of high voltage DC breaker control and protection unit, mechanical switch, valve control unit, OCT Information bit and submodule block state information position.

3. being used for the monitoring system of high voltage DC breaker as described in claim 1, which is characterized in that the breaker monitoring Unit includes manual recording module and automatic recording module；The manual recording module is when the recording for receiving host computer PC equipment When order, to the SOE event and the progress recording operation of high voltage DC breaker submodule information of voltage after parsing, and recording is generated File, and recorded wave file is converted into ICP/IP protocol, host computer PC equipment is uploaded to by Ethernet；

Automatic recording when the automatic recording module is generated for sensitive event.

4. being used for the monitoring system of high voltage DC breaker as described in claim 1, which is characterized in that the breaker monitoring Unit includes GPS clock；At least one the breaker monitoring unit receives the clock synchronization information of the GPS clock, when with GPS Clock is as standard clock source.

5. being used for the monitoring system of high voltage DC breaker as described in claim 1, which is characterized in that the host computer PC is set It is standby to use FPGA-PowerPC dual core processor, for caching and forwarding event；The FPGA-PowerPC dual core processor packet Include FPGA and PowerPC；

The FPGA is used for external communication process, the displacement of status information position, receives markers, update mode bit memory block, detection The addition of breaker monitoring unit self communication state and submodule block number, submodule number-of-fragments；

The PowerPC is used for SOE event buffer and sends SOE event.

6. being used for the monitoring system of high voltage DC breaker as described in claim 1, which is characterized in that the slave computer monitoring It is connected between equipment and host computer PC equipment using standard ethernet interface, the slave computer supervision equipment passes through different threads Analog quantity information, SOE event information and recording order are uploaded to host computer PC equipment.

7. a kind of monitoring method for high voltage DC breaker, it is characterised in that:

Breaker monitoring unit receive high voltage DC breaker analog quantity information and status information position, by status information position according to It conjugates situation and generates corresponding SOE event information, and after beating markers to analog quantity information and SOE event information, deposit event is delayed It is to be sent to rush area etc., analog quantity information is passed through into standard ethernet interface as telemetering amount, using status information position as remote signalling amount Host computer PC equipment is sent to be shown；

Host computer PC equipment is used to check the state of analog quantity information and SOE to be sent event buffer, according to entering memory block Sequence transmission target analog quantity information and SOE event information when having；

When slave computer supervision equipment receives the recording order of host computer PC equipment, using manual recording module to parsing after SOE event information and information of voltage carry out recording operation, and generate recorded wave file；Sensitive event starts automatic recording module and generates Recorded wave file；

Recorded wave file is converted into ICP/IP protocol, the host computer PC equipment is uploaded to by Ethernet.

8. monitoring method as claimed in claim 7, it is characterised in that: the breaker monitoring unit receives high voltage direct current open circuit Status information position is generated corresponding SOE event information according to displacement situation by the analog quantity information of device and status information position, and right Analog quantity information and SOE event information beat markers, and deposit event buffer etc. is to be sent, using analog quantity information as telemetering amount, Status information position is sent to host computer PC equipment by standard ethernet interface as remote signalling amount to show, comprising:

The breaker monitoring unit receives the mechanical switch capacitance voltage value of high voltage DC breaker control and protection unit transmission The submodule information of voltage that information, the analog quantity information of OCT, high voltage DC breaker valve control unit transmit, and analyze record Above-mentioned analog quantity information is issued host computer PC by standard ethernet interface as telemetering amount and set by module capacitance voltage max It is standby to be shown；

The breaker monitoring unit receive control and protection unit from high voltage DC breaker, mechanical switch,

Valve control unit, the status information position of OCT and submodule block state information position, by control and protection unit, mechanical switch, valve control list Member, the status information position of OCT and submodule block state information position are stamped markers and are buffered；Status information position is received with the last time Each status information position be successively compared, check displacement situation generated corresponding if status information position conjugates SOE event beats markers, and deposit event buffer etc. is to be sent, and new status information position is stored record, and high voltage direct current is broken Road device control and protection unit, mechanical switch, valve control unit, OCT and submodule block state information pass through standard ether as remote signalling amount Network interface uploads to host computer PC equipment and is shown.

9. monitoring method as claimed in claim 8, it is characterised in that: the analog quantity information includes high voltage DC breaker control The mechanical switch capacitance voltage value information of protection location transmission processed, the analog quantity information of optic current transformer OCT, high voltage direct current are disconnected The submodule information of voltage of road device valve control unit transmission；

The status information position includes the state of high voltage DC breaker control and protection unit, mechanical switch, valve control unit, OCT Information bit and submodule block state information position.

10. monitoring method as claimed in claim 9, which is characterized in that submodule block state information position includes:

By-pass switch triggering allows；

By-pass switch is refused to close；

By-pass switch closes；

By-pass switch point；

Submodule over-voltage fault；

Valve control unit -> submodule communicates the exceeded failure of the bit error rate；

Valve control unit -> submodule optical channel failure；

Driving malfunction；

Draw-out power supply early warning failure；

Draw-out power supply faults itself；

Draw-out power supply exports failure；

Draw-out power supply input fault；

Residual voltage abnormal failure；

Operational mode position；

Submodule -> exceeded the failure of the valve control unit communications bit error rate；

Submodule -> valve control unit light channel failure.