CN101964543A - HVDC thyristor valve base electronic equipment system - Google Patents

Abstract

The invention relates to the field of high voltage direct current transmission (HVDC), in particular to a novel HVDC converter valve valve base electronic equipment system. The system of the present invention divides the interactive signals between the electronic equipment of the converter valve valve base and the extreme control system of the converter station into two categories of control signals and monitoring signals according to different functional targets. Corresponding to different types of interactive signals, the present invention designs different hardware subsystems for processing, so as to avoid possible mutual influence caused by the control signals and monitoring signals sharing the same control system hardware. In addition, in addition to the traditional remote control function, it also has a local control subsystem module that realizes the local monitoring work mode.

Description

A HVDC converter valve valve base electronic equipment system

technical field

The invention relates to the field of high voltage direct current transmission (HVDC), in particular to a novel HVDC converter valve valve base electronic equipment system.

Background technique

In high-voltage direct current transmission (HVDC), the converter valve valve base electronics is the first-level monitoring device for the converter valve. According to the received control command of the extreme control system, the device directly realizes the triggering and blocking operations of the converter valve, and collects the reported information of each thyristor level in real time, and feeds it back to the extreme control system. The traditional converter valve monitoring equipment system has the following two major disadvantages: First, the signal processing does not distinguish the importance of the signal, and is completed through the same hardware system, so that once the processing hardware fails, neither the monitoring signal nor the control signal can be processed. The second is that there is only a remote monitoring function, so that once there is a problem with the communication line, the equipment will not work at all.

Contents of the invention

The purpose of the present invention is to overcome the above defects and propose a novel HVDC converter valve base electronic equipment system with simple and clear structure, stable and reliable operation, and two working modes of remote and local monitoring.

A new type of high-voltage direct current transmission HVDC converter valve valve base electronic equipment system of the present invention, the equipment system adopts a modular design, all modules are integrated in a control cabinet, and the interior is composed of a chassis with various functions, the chassis includes a power supply chassis and optical control chassis, the power supply chassis is used to provide dual power supply for other chassis in the cabinet, and the light control chassis is used to realize protection, monitoring, triggering and communication functions; The interactive signals between the control systems are divided into two categories: control signals and monitoring signals according to different functional targets. Corresponding to different types of interactive signals, different hardware subsystems are used for processing, so as to avoid the control signals and monitoring signals sharing the same control. The interaction that may be brought about by the system hardware, the system has a remote control function module and a local control subsystem module that realizes the local monitoring work mode.

Wherein, each optical control cabinet includes a detection board and a main control board, and the two main control boards in the optical control cabinet constituting the valve-based electronic equipment are used to realize the dual redundancy of the system, and the main control boards between them and the control and protection system The interface includes: trigger coding signal, monitoring enable signal, valve lock signal, trip signal, trip request, communication and several spare input and output ports; there are two microcontroller chips on the main control board, of which the first microcontroller is used to complete Summarize the signals reported by other detection boards and report the communication to the extreme control system. The second microcontroller is used to receive the control signals from the extreme control system, analyze and recode them and send them to each detection board through the backplane. The controllers send detection pulses to each other. The detection pulses are used for mutual inspection between chips. When one of the microcontroller chips finds that the other microcontroller chip cannot work normally, it will send a trip signal to the control and protection system;

The detection board in the optical control box has two functions: one is to realize the electrical copy and forwarding of the control signal of the main control board, and the other is to analyze, classify and store the information reported by the thyristor level and communicate with the first microcomputer on the main control board. Communication between controllers, each detection board can monitor 6 levels of thyristors, and the number of detection boards can be flexibly configured according to different projects to complete the monitoring of converter valves of different scales. The detection board corresponds to each level of thyristors There are corresponding indicator lights, which can indicate the running status of each thyristor stage on the spot, and realize on-site monitoring when the communication is interrupted.

Wherein, the said interaction signals between the valve base electronic equipment of the converter valve and the extreme control system of the converter station are divided into two categories of control signals and monitoring signals according to different functional targets. The interactive signals between extreme control systems are divided into two priorities according to different control functions: the control signals used to realize the control functions such as triggering and blocking of the converter valve are the first level; the monitoring of the report of the operating status of the converter valve is realized The signal is the second level. For different interactive signals, the system sets up different subsystems for processing, so as to avoid the mutual influence that may be caused by the control signal and the monitoring signal sharing the same control system.

Wherein, the remote control function module and the on-site control subsystem module realizing the on-site monitoring work mode are in the case that the remote control function module fails and is unavailable, through the local communication port of the corresponding chassis and the corresponding operation status indicating device Monitor the converter valve accurately and provide convenience for maintenance, repair and debugging of the converter valve.

The advantage of technical scheme of the present invention is:

1. Classification and sub-system processing of interactive signals with the extreme control system

2. Two working modes: remote control and close control.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

FIG. 1 shows the structure of a housing for valve-based electronic equipment according to the present invention.

Fig. 2 is a schematic structural diagram of the main control board board system according to the present invention.

Fig. 3 is a schematic structural diagram of the detection board board system according to the present invention.

Detailed ways

The valve-based electronic equipment system solution of the present invention is: divide the interactive signal between the valve-based electronic equipment and the extreme control system of the converter station into two priority levels according to different control functions, that is, for realizing the triggering of the converter valve Control signals for control functions such as lock and lock, and monitoring signals for reporting the operating status of the converter valve. Corresponding to different interactive signals, the system sets up different subsystems for processing, so as to avoid the mutual influence that may be caused by the control signal and the monitoring signal sharing the same control system.

See accompanying drawing 1 for the chassis structure of the valve base electronic equipment. System functions are mainly completed by two boards: the main control board and the detection board. See Figure 2 and Figure 3 for the board system diagram.

The main control board contains two microcontrollers. Microcontroller 1 receives trigger coding signal, monitoring enabling signal, valve blocking signal and tripping signal from control protection. Microcontroller 1 performs ANDing of the trigger encoding signal and the monitoring enable signal before encoding, and the output to the connection backplane of the chassis is transferred to the microcontrollers on each detection board. Microcontroller 2 connects signals such as data bus, address bus and read data enable to each detection board through the chassis connection backplane, and microcontroller 2 reads the monitoring information of the thyristor level from the detection board, summarizes and classifies them through internal programs, and Based on this, the operating status of the converter valve is judged, and a trip command is sent to the control and protection system when the converter valve fails. The microcontroller 2 communicates with the control protection through the communication receiving and sending ports at the same time. An interactive signal is connected between the microcontroller 1 and the microcontroller 2 for mutual inspection between the chips, so that the control and protection can be notified through the communication network in time when the chip runs abnormally. The detection board only contains a microcontroller, which corresponds to the trigger and return optical fiber interface of the 6-level thyristor, and is connected to the main control board through the backplane to transmit the return data and receive the trigger code. The microcontroller displays the state detection information on the indicator light on the back panel in real time, which is convenient for local monitoring of the operating state of the converter valve.

The two main control boards in the chassis of the valve-based electronic equipment are used to realize the dual redundancy of the system. The main interfaces between it and the control and protection system include: trigger coding signal, monitoring enable signal, valve lock signal, trip signal, trip request, communication (send/receive), and several spare input and output ports. There are two microcontroller chips on the main control board, and the microcontroller 1 is used to complete the summary of the signals reported by other detection boards and the communication report to the extreme control system. Microcontroller 2 is specially used to receive the control signal from the extreme control system, analyze and recode it and send it to each detection board through the backplane. The two microcontrollers send detection pulses to each other. This pulse is used for mutual inspection between chips. When one of them finds that the other is not working properly, it will send a trip signal to the control and protection system.

The detection board has two functions: one is to realize the electrical copy and forwarding of the control signals of the main control board, and the other is to analyze, classify and store the information reported by the thyristor level and communicate with the microcontroller 1 on the main control board. Each detection board can monitor six levels of thyristors, and the number of detection boards can be flexibly configured according to different projects to complete the monitoring of converter valves of different sizes. There are special indicator lights corresponding to each level of thyristor on the detection board, which can indicate the operating status of each thyristor level on the spot, and realize on-site monitoring when the communication is interrupted.

The invention has been described herein in terms of specific exemplary embodiments. Appropriate substitutions or modifications will be apparent to those skilled in the art without departing from the scope of the present invention. The exemplary embodiments are illustrative only, and not limiting of the scope of the invention, which is defined by the appended claims.

Claims (4)

1. novel high voltage direct current transmission HVDC converter valve valve base electronic apparatus system, it is characterized in that this device systems adopts modularized design, all modules are integrated in the control rack, inside is made of the cabinet with various functions, cabinet comprises power supply cabinet and light-operated cabinet, the power supply cabinet is used to interior other cabinets of cabinet that dual power supply is provided, and described light-operated cabinet is used to realize protection, supervision, triggering and communication function; Converter valve valve base electronic equipment is divided into control signal and supervisory signal two big classes with interactive signal between the current conversion station utmost point control system by different functional objectives, corresponding different classes of interactive signal, adopt different hardware subsystems to handle, the influencing each other of may bringing to avoid the shared same hardware control system of control signal and supervisory signal, this system possesses the telecontrol functional module and realizes the module of control subsystem on the spot of follow-up work pattern on the spot.

2. the system as claimed in claim 1, it is characterized in that comprising check-out console and master control borad in each light-operated cabinet, two master control borads are used to the two redundant of the system that realizes in the light-operated cabinet of described formation valve base electronic device, and it comprises with the main interface of controlling between protection system: trigger code signal, monitoring enable signal, valve blocking signal, trip signal, tripping operation request, communicate by letter and some standby input/output ports; Two microcontroller chips are arranged on the master control borad, wherein first microcontroller (1) is used to finish other check-out console is reported gathering of signal and reports to the communication of utmost point control system, second microcontroller (2) is used for the control signal that receiving pole control system transmits, and send to each check-out console by backboard after resolving recodification, send mutually between two microcontrollers and detect pulse, this detection pulse is used for chip chamber and examines mutually, when wherein a slice microcontroller chip is found another sheet microcontroller chip cisco unity malfunction, will send trip signal to the control protection system;

Check-out console in the described light-operated cabinet has two functions: the one, realize the electric of master control borad control signal duplicated and transmit; the 2nd, to the parsing classified and stored of thyristor level reporting information and with master control borad on communicating by letter between first microcontroller (1); every check-out console can be realized the supervision to 6 grades of thyristor levels; but number according to engineering difference flexible configuration check-out console; finish monitoring to the different scales converter valve; corresponding every grade of thyristor all has corresponding indicator light on the check-out console; can indicate the running status of each thyristor level on the spot, the supervision on the spot when being implemented in communication disruption.

3. system as claimed in claim 2 is characterized in that describedly converter valve valve base electronic equipment being divided into control signal with interactive signal between the current conversion station utmost point control system by different functional objectives and supervisory signal two big classes are that the interactive signal between valve base electronic device and the current conversion station utmost point control system is divided into two priority by different controlled function: be used to realize that the control signal of controlled function such as converter valve triggering, locking is the first order; Realize that the supervisory signal that the converter valve running status reports is the second level, for different interactive signals, system is provided with different subsystems and handles, the mutual related influence that may bring to avoid the shared same control system of control signal and supervisory signal.

4. system as claimed in claim 3, it is characterized in that described distant control function module and realize that the module of control subsystem on the spot of follow-up work pattern on the spot is under the distant control function module lost efficacy disabled situation, port on the spot by corresponding cabinet cooperates corresponding running status indicating device can monitor converter valve on the spot, for safeguarding and overhauling the debugging converter valve and provide convenience.

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