CN111999266A - Converter valve voltage-sharing electrode scaling online monitoring system - Google Patents
Converter valve voltage-sharing electrode scaling online monitoring system Download PDFInfo
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- CN111999266A CN111999266A CN202010834537.3A CN202010834537A CN111999266A CN 111999266 A CN111999266 A CN 111999266A CN 202010834537 A CN202010834537 A CN 202010834537A CN 111999266 A CN111999266 A CN 111999266A
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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Abstract
An online monitoring system for converter valve voltage-sharing electrode scaling comprises a voltage-sharing electrode monitoring terminal on a converter valve tower and a voltage-sharing electrode monitoring host machine in a control room below the converter valve tower, wherein the terminal and the host machine are connected with each other through optical fibers or a wireless network for data communication. The voltage-sharing electrode monitoring terminal comprises an optical transmitting unit, an optical receiving unit, a received optical signal processing unit and a received optical data transmitting unit; the light sending unit sends incident light to the voltage-sharing electrode, reflected light of the voltage-sharing electrode is received by the light receiving unit, received signals are processed by the received light signal processing unit, the received light data sending unit sends processing results to the voltage-sharing electrode monitoring host through wireless or optical fibers, and the host carries out data storage and scale formation and oxidation alarm of the voltage-sharing electrode. The pressure-equalizing electrode monitoring terminal based on the light reflection principle is arranged on the valve cold water pipe, so that the corrosion and scaling conditions of the pressure-equalizing electrode of the converter valve can be monitored on line, and the maintenance problem of the pressure-equalizing electrode is effectively solved.
Description
Technical Field
The invention relates to the technical field of converter valve cooling systems, in particular to an online monitoring system for converter valve voltage-sharing electrode scaling.
Background
In recent years, along with the construction and operation of converter valves in high-voltage direct-current engineering, a large amount of valve cold water paths responsible for cooling the converter valves are synchronously put into use. The cooling water path of the valve runs in a closed manner, a series/parallel combination design is adopted, elements which need heat dissipation, such as different IGBT radiating fins, water-cooling resistors and the like on a valve tower are connected, the elements are at different electric potentials, and the water paths among metal pieces at different electric potentials can generate electrolytic current and can bring electrolytic corrosion to metal. Therefore, in order to ensure good insulation of the water path and reduce corrosion leakage current of the aluminum radiator, the water path is provided with a voltage-sharing electrode.
The voltage-sharing electrode can generate electrochemical corrosion and deposition from the surface along with the long-time operation of the water cooling system, the color and the scale are changed, the effective working area of the electrode can be reduced, the conductive capacity of the voltage-sharing electrode is reduced, and the voltage-sharing effect is reduced. When the scaling of the voltage-sharing electrode is serious, the scale is stripped and enters a water channel for circulation, so that a cooling water pipe is blocked, the equipment is stopped, the running stability of the converter valve is influenced, and certain economic loss is caused.
Because the voltage-sharing electrode is arranged on a water pipe of the valve tower, personnel cannot approach to the detection when the valve tower runs at high pressure, the operation and maintenance of the voltage-sharing electrode always means that the personnel go to the tower to detect the corrosion and scaling conditions of the voltage-sharing electrode when the converter valve stops running, and the state of the voltage-sharing electrode cannot be detected in real time. Therefore, the state of the voltage-sharing electrode is unknown when the valve tower runs, and the voltage-sharing electrode can be checked only when the converter valve stops running; and when the converter valve stops running, the procedure is complicated when personnel go to the tower to pull out the electrodes one by one to check, the operation time is long, the time for stopping running and maintaining the converter valve is prolonged, and certain potential safety hazards exist.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides an online monitoring system for the scaling of a voltage-sharing electrode of a converter valve.
In order to achieve the purpose, the invention adopts the following technical scheme:
an on-line monitoring system for converter valve voltage-sharing electrode scaling comprises: the voltage-sharing electrode monitoring terminal on the converter valve tower and the voltage-sharing electrode monitoring host in the control room below the converter valve tower are connected with each other through optical fibers or a wireless network for data communication.
The voltage-sharing electrode monitoring terminal comprises an optical sending unit, an optical receiving unit, a received optical signal processing unit and a received optical data sending unit; the light sending unit sends incident light to the voltage-sharing electrode, reflected light of the voltage-sharing electrode is received by the light receiving unit, received signals are processed by the received light signal processing unit, the received light data sending unit sends processing results to the voltage-sharing electrode monitoring host through wireless or optical fibers, and the host carries out data storage and scale formation and oxidation alarm of the voltage-sharing electrode.
Every voltage-sharing electrode that needs to be monitored all is equipped with a voltage-sharing electrode monitor terminal, and the adjustment that corresponds is carried out according to water-cooling pipeline transparency degree, voltage-sharing electrode's form to voltage-sharing electrode monitor terminal form to reach the purpose of monitoring the scale deposit of voltage-sharing electrode, oxidation state.
1. When the water cooling pipeline is transparent and the voltage-sharing electrode is of a rod-shaped structure inserted into the water pipe, the voltage-sharing electrode monitoring terminal is sleeved outside the water pipe, and the light transmitting unit and the light receiving unit are positioned on two sides of the cooling water pipe; the light receiving unit receives the reflected light of the voltage-sharing electrode at a proper angle outside the tube, extracts the intensity of the reflected light through data processing and analysis, and sends the intensity of the light to the monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine can send out and report an emergency and ask for help or increased vigilance.
2. When the water cooling pipeline is transparent and the voltage-sharing electrode is a tubular structure arranged in the water pipe, the voltage-sharing electrode monitoring terminal is sleeved outside the water pipe, the light sending part and the light receiving part are both arranged at the top end of the water pipe, the light sending part emits infrared light at a set angle, and the light receiving part can receive the reflected infrared light after the light is reflected by the inner wall of the voltage-sharing electrode; the intensity of the reflected light is extracted through data processing and analysis, and the light intensity is sent to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine can send out and report an emergency and ask for help or increased vigilance.
3. When the water cooling pipeline is opaque and the voltage-sharing electrode is a rod-shaped structure inserted into the water pipe, the installation form of the monitoring terminal is as follows: a transparent hollow column body is inserted into the water pipe in front of the voltage-sharing electrode (in the direction of water flow), and a light transmitting unit and a light receiving unit of the voltage-sharing electrode monitoring terminal are placed in the hollow column body; the light transmitting part emits light to the side of the voltage-sharing electrode horizontally or at a small angle, and the light receiving unit transmits the light reflected by the voltage-sharing electrode to the signal processing and transmitting part on the water pipe; extracting the intensity of the reflected light through data processing and analysis, and sending the light intensity to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine can send out and report an emergency and ask for help or increased vigilance.
4. When the water cooling pipeline is opaque and the voltage-sharing electrode is a tubular structure arranged in the water pipe, the installation form of the monitoring terminal is as follows: transparent hollow cylinders are respectively arranged at the front and the back of the top end of a water pipe of the voltage-sharing electrode, the cylinders are inserted into the water pipe, and the length of the cylinders is determined according to the diameter of the water pipe; the light transmitting part is installed in one of the transparent columns to emit incident light at a set angle; the light receiving part is arranged in the other transparent column body and receives the reflected light of the voltage equalizing electrode at a set angle; a signal processing and transmitting part which is transmitted to the water pipe; extracting the intensity of the reflected light through data processing and analysis, and sending the light intensity to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine can send out and report an emergency and ask for help or increased vigilance.
Compared with the prior art, the invention has the beneficial effects that:
the online monitoring method for scaling and oxidation of the voltage-sharing electrode of the converter valve by adopting the light reflection principle can be widely applied to direct current engineering with water cooling requirements, is used for auxiliary monitoring of the state of a daily valve tower, and can be matched with an online descaling method to detect the descaling effect after descaling. The working strength of maintenance personnel can be greatly reduced, the maintenance efficiency is improved, the high-altitude operation of the personnel on the tower is avoided, and the operation reliability of the valve tower is improved.
Drawings
FIG. 1 is a topological structure diagram of an online monitoring system for converter valve voltage-sharing electrode scaling according to the present invention;
FIG. 2 is a schematic diagram of a transparent water-cooled tube using a rod-like voltage-sharing electrode according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a transparent, tubular voltage-sharing electrode assembly for a secondary water-cooled tube according to an embodiment of the present invention;
FIG. 4 is a structural diagram of an opaque three-water-cooled tube using a rod-shaped voltage-sharing electrode according to an embodiment of the present invention;
FIG. 5 is an illustration of an embodiment of the invention in which a quad-water cooled tube is opaque and uses a tubular voltage grading electrode.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1, an online monitoring system for converter valve voltage-sharing electrode scaling comprises: the voltage-sharing electrode monitoring terminal on the converter valve tower and the voltage-sharing electrode monitoring host in the control room below the converter valve tower are connected with each other through optical fibers or a wireless network for data communication.
The voltage-sharing electrode monitoring terminal comprises an optical sending unit, an optical receiving unit, a received optical signal processing unit and a received optical data sending unit; the light sending unit sends incident light to the voltage-sharing electrode, reflected light of the voltage-sharing electrode is received by the light receiving unit, received signals are processed by the received light signal processing unit, the received light data sending unit sends processing results to the voltage-sharing electrode monitoring host through wireless or optical fibers, and the host carries out data storage and scale formation and oxidation alarm of the voltage-sharing electrode.
Every voltage-sharing electrode that needs to be monitored all is equipped with a voltage-sharing electrode monitor terminal, and the adjustment that corresponds is carried out according to water-cooling pipeline transparency degree, voltage-sharing electrode's form to voltage-sharing electrode monitor terminal form to reach the purpose of monitoring the scale deposit of voltage-sharing electrode, oxidation state.
The first embodiment is as follows:
as shown in fig. 2, when the water cooling pipeline is transparent and the voltage-sharing electrode is a rod-shaped structure inserted into the water pipe, the voltage-sharing electrode monitoring terminal is sleeved outside the water pipe, and the light transmitting unit and the light receiving unit are located on two sides of the cooling water pipe; the light receiving unit receives the reflected light of the voltage-sharing electrode at a proper angle outside the tube, extracts the intensity of the reflected light through data processing and analysis, and sends the intensity of the light to the monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine can send out and report an emergency and ask for help or increased vigilance.
Example two:
as shown in fig. 3, when the water cooling pipeline is transparent and the voltage-sharing electrode is a tubular structure installed in the water pipe, the voltage-sharing electrode monitoring terminal is sleeved outside the water pipe, and the light transmitting part and the light receiving part are both arranged at the top end of the water pipe, the light transmitting part transmits infrared light at a set angle, and after being reflected by the inner wall of the voltage-sharing electrode, the light receiving part can receive the reflected infrared light; the intensity of the reflected light is extracted through data processing and analysis, and the light intensity is sent to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine can send out and report an emergency and ask for help or increased vigilance.
Example three:
as shown in fig. 4, when the water cooling pipeline is opaque and the pressure equalizing electrode is a rod-like structure inserted into the water pipe, the installation form of the monitoring terminal is as follows: a transparent hollow column body is inserted into the water pipe in front of the voltage-sharing electrode (in the direction of water flow), and a light transmitting unit and a light receiving unit of the voltage-sharing electrode monitoring terminal are placed in the hollow column body; the light transmitting part emits light to the side of the voltage-sharing electrode horizontally or at a small angle, and the light receiving unit transmits the light reflected by the voltage-sharing electrode to the signal processing and transmitting part on the water pipe; extracting the intensity of the reflected light through data processing and analysis, and sending the light intensity to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine can send out and report an emergency and ask for help or increased vigilance.
Example four:
as shown in fig. 5, when the water cooling pipeline is opaque and the pressure equalizing electrode is a tubular structure installed in the water pipe, the installation form of the monitoring terminal is as follows: transparent hollow cylinders are respectively arranged at the front and the back of the top end of a water pipe of the voltage-sharing electrode, the cylinders are inserted into the water pipe, and the length of the cylinders is determined according to the diameter of the water pipe; the light transmitting part is installed in one of the transparent columns to emit incident light at a set angle; the light receiving part is arranged in the other transparent column body and receives the reflected light of the voltage equalizing electrode at a set angle; a signal processing and transmitting part which is transmitted to the water pipe; extracting the intensity of the reflected light through data processing and analysis, and sending the light intensity to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine can send out and report an emergency and ask for help or increased vigilance.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (5)
1. An online monitoring system for converter valve voltage-sharing electrode scaling is characterized by comprising: a voltage-sharing electrode monitoring terminal on the converter valve tower and a voltage-sharing electrode monitoring host in a control room below the converter valve tower are connected with the host through optical fibers or a wireless network for data communication;
the voltage-sharing electrode monitoring terminal comprises an optical sending unit, an optical receiving unit, a received optical signal processing unit and a received optical data sending unit; the light sending unit sends incident light to irradiate on the voltage-sharing electrode, reflected light of the voltage-sharing electrode is received by the light receiving unit, received signals are processed by the received light signal processing unit, the received light data sending unit sends processing results to the voltage-sharing electrode monitoring host through wireless or optical fiber, and the host carries out data storage and scale formation and oxidation alarm of the voltage-sharing electrode;
every voltage-sharing electrode that needs to be monitored all is equipped with a voltage-sharing electrode monitor terminal, and the adjustment that corresponds is carried out according to water-cooling pipeline transparency degree, voltage-sharing electrode's form to voltage-sharing electrode monitor terminal form to reach the purpose of monitoring the scale deposit of voltage-sharing electrode, oxidation state.
2. The on-line monitoring system for the converter valve voltage-sharing electrode scaling as recited in claim 1, wherein when the water cooling pipeline is transparent and the voltage-sharing electrode is a rod-like structure inserted into the water pipe, the voltage-sharing electrode monitoring terminal is sleeved outside the water pipe, and the light transmitting unit and the light receiving unit are located at two sides of the cooling water pipe; the light receiving unit receives the reflected light of the voltage-sharing electrode at a proper angle outside the tube, extracts the intensity of the reflected light through data processing and analysis, and sends the intensity of the light to the monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine sent and reports an emergency and asks for help or increased vigilance.
3. The on-line monitoring system for the converter valve voltage-sharing electrode fouling according to claim 1, characterized in that when the water cooling pipeline is transparent and the voltage-sharing electrode is a tubular structure installed in the water pipe, the voltage-sharing electrode monitoring terminal is sleeved outside the water pipe, and the light transmitting part and the light receiving part are both arranged at the top end of the water pipe, the light transmitting part transmits infrared light at a set angle, and after being reflected by the inner wall of the voltage-sharing electrode, the light receiving part can receive the reflected infrared light; the intensity of the reflected light is extracted through data processing and analysis, and the light intensity is sent to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine sent and reports an emergency and asks for help or increased vigilance.
4. The on-line monitoring system for the converter valve voltage-sharing electrode fouling according to claim 1, wherein when the water cooling pipeline is opaque and the voltage-sharing electrode is a rod-shaped structure inserted into the water pipe, the installation form of the monitoring terminal is as follows: a transparent hollow column body is inserted into the water pipe in front of the voltage-sharing electrode (in the direction of water flow), and a light transmitting unit and a light receiving unit of the voltage-sharing electrode monitoring terminal are placed in the hollow column body; the light transmitting part emits light to the side of the voltage-sharing electrode horizontally or at a small angle, and the light receiving unit transmits the light reflected by the voltage-sharing electrode to the signal processing and transmitting part on the water pipe; extracting the intensity of the reflected light through data processing and analysis, and sending the light intensity to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine sent and reports an emergency and asks for help or increased vigilance.
5. The on-line monitoring system for the converter valve voltage-sharing electrode fouling according to claim 1, wherein when the water cooling pipeline is opaque and the voltage-sharing electrode is a tubular structure installed in the water pipe, the installation form of the monitoring terminal is as follows: transparent hollow cylinders are respectively arranged at the front and the back of the top end of a water pipe of the voltage-sharing electrode, the cylinders are inserted into the water pipe, and the length of the cylinders is determined according to the diameter of the water pipe; the light transmitting part is installed in one of the transparent columns to emit incident light at a set angle; the light receiving part is arranged in the other transparent column body and receives the reflected light of the voltage equalizing electrode at a set angle; a signal processing and transmitting part which is transmitted to the water pipe; extracting the intensity of the reflected light through data processing and analysis, and sending the light intensity to a monitoring host;
the monitoring host machine compares according to current light intensity and original light intensity, analyzes out the scale deposit and the oxidation condition of voltage-sharing electrode, and scale deposit, the oxidation condition is about abominable, and the reflected light intensity is weaker, and when received light intensity reached the critical light intensity value that voltage-sharing electrode can continue to use, the monitoring host machine sent and reports an emergency and asks for help or increased vigilance.
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| CN202010834537.3A CN111999266A (en) | 2020-08-19 | 2020-08-19 | Converter valve voltage-sharing electrode scaling online monitoring system |
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Cited By (1)
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| CN115096905A (en) * | 2022-06-23 | 2022-09-23 | 国网(西安)环保技术中心有限公司 | In-situ optical detection device and method for scaling degree of voltage-sharing electrode |
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