CN110864924A - Testing device and testing method for converter valve cooling system - Google Patents
Testing device and testing method for converter valve cooling system Download PDFInfo
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- CN110864924A CN110864924A CN201911089290.0A CN201911089290A CN110864924A CN 110864924 A CN110864924 A CN 110864924A CN 201911089290 A CN201911089290 A CN 201911089290A CN 110864924 A CN110864924 A CN 110864924A
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- valve cooling
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- converter valve
- cooling system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The invention relates to the technical field of direct current transmission valve cooling systems, in particular to a testing device and a testing method of a converter valve cooling system, and the testing device of the converter valve cooling system comprises a valve cooling testing system and a valve cooling control system; it is characterized in that the valve cold test system comprises: the device comprises a calculation module, a conversion module and a communication module; the computing module is connected with a conversion module, and the conversion module is connected with a valve cooling control system; the computing module is connected with the communication module, and the communication module is connected with the valve cooling control system. The protection instrument value of the converter valve cooling system can be accurately set, so that each verification test is closer to the actual operation condition, the accuracy and reliability of protection and inspection can be ensured, and the quality and efficiency of the protection and inspection work of the converter valve cooling system can be improved.
Description
Technical Field
The invention relates to the technical field of direct current transmission valve cooling systems, in particular to a testing device and a testing method of a converter valve cooling system.
Background
The cooling system of the high-voltage direct-current transmission converter valve is an important component of the whole direct-current system, and is a system related to multiple specialties such as heating ventilation, refrigeration, electricity, water treatment and control. The system is formed by various devices, equipment and instruments, and high requirements are put on the design, installation, debugging, overhauling and detection of the system. In recent years, converter valve cooling systems directly cause unplanned shutdown of direct current systems to account for about half of the total number due to reasons of material aging, component damage, water quality change, heat exchanger scaling corrosion, scaling corrosion of water distribution pipe electrodes and sealing rings, main pump water leakage, online instrument faults and errors, control protection system malfunction, imperfect primary equipment design and the like, which indicates that the converter valve cooling systems are one of the greatest risks threatening safe and reliable operation of the direct current systems. It is therefore highly desirable to periodically verify the dc converter valve cooling system.
According to the detection and management regulations of direct current converter stations of national grid companies, trip logic and fixed value verification work needs to be carried out on protection of converter valve cooling systems of converter stations every year, the converter valve cooling systems of the converter stations are provided with flow and pressure protection, temperature protection, liquid level protection, leakage protection and the like, at present, fixed value modification or a potentiometer simulation method is adopted for protection and inspection, and no protection and test device for the converter valve cooling systems exists at home and abroad.
The conventional method using the modified constant value or the simulation using the potentiometer has the following problems: (1) whether the protection constant value of the converter valve cooling system is consistent with the operation constant value or not cannot be accurately verified; (2) manual access and adjustment of a plurality of potentiometers takes a long time, and the accuracy cannot be guaranteed; (3) the main circulating pump needs to be started and stopped for multiple times to meet the protection and verification state, and the machine seal of the main circulating pump is damaged to cause water leakage.
In order to solve the problems, the invention provides a testing device and a testing method of a converter valve cooling system, which can accurately set the protection instrument value of the converter valve cooling system, make each verification test closer to the actual operation condition, ensure the accuracy and reliability of protection and inspection, and improve the quality and efficiency of the protection and inspection work of the converter valve cooling system.
Disclosure of Invention
The invention aims to provide a testing device and a testing method for a converter valve cooling system. The testing device and the testing method of the converter valve cooling system can accurately set the protection instrument value of the converter valve cooling system, enable each verification test to be closer to the actual operation condition, guarantee the accuracy and reliability of protection and inspection, and improve the quality and efficiency of the protection and inspection work of the converter valve cooling system.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a testing device for a converter valve cooling system comprises a valve cooling testing system and a valve cooling control system; the valve cold test system comprises: the device comprises a calculation module, a conversion module and a communication module;
the computing module is connected with a conversion module, and the conversion module is connected with a valve cooling control system; the computing module is connected with the communication module, and the communication module is connected with the valve cooling control system.
Preferably, the computing module comprises: the system comprises a human-computer interface and a PLC (programmable logic controller) calculation module, wherein the human-computer interface is communicated with the PLC calculation module through the Ethernet.
Preferably, the conversion module comprises an isolation conversion module and a three-terminal isolation amplifier, the input end of the isolation conversion module is connected with the output end of the PLC calculation module of the calculation module, the output end of the isolation conversion module is connected with the input end of the three-terminal isolation amplifier, and the output end of the three-terminal isolation amplifier is connected with the input end of the valve cooling control system.
Preferably, the communication module comprises two modes of bus communication and optical fiber communication.
Further preferably, the bus communication connects the PLC calculation module with the valve cooling control system through a bus coupler, and the bus communication is used for the valve cooling test system to receive the device state and the device alarm information of the valve cooling control system in real time. The converter valve cooling system testing device and the converter valve cooling control system realize electrical isolation and interference-free communication through the bus coupler, and the converter valve cooling system testing device receives equipment state and equipment alarm information related to the main circulating pump on the bus in real time.
Further preferably, the optical fiber communication module comprises two optical modulation modules, the first optical modulation module is connected with the PLC calculation module, the second optical modulation module is connected with the valve cooling control system, and the optical modulation modules are used for optical modulation communication between the valve cooling test system and the valve cooling control system.
Further preferably, the converter valve cooling system testing device is designed with an optical modulation module for simulating an upper computer of the converter valve cooling system. The output of the light modulation module of the converter valve cooling system testing device is connected with the input of the light modulation module of the converter valve cooling system, and the input of the light modulation module of the converter valve cooling system testing device is connected with the output of the light modulation module of the converter valve cooling system. The converter valve cooling system testing device issues commands and states to the converter valve cooling system through the light modulation module, and the converter valve cooling system uploads the states to the converter valve cooling system testing device through the light modulation module.
The method comprises the steps of sending signals to a human-computer interface of a valve cooling control system testing device, wherein the signals comprise a remote valve cooling starting system, a remote valve cooling stopping system, a remote switching main circulating pump, a converter valve unlocking system, a converter valve locking system and a direct current system available, and the signals uploaded by the valve cooling control system comprise a valve cooling system tripping, a valve cooling system available, a power request descending, a valve cooling system ready, a valve cooling system with redundancy capability and a valve cooling system activation.
A testing method of a testing device of a converter valve cooling system comprises the following steps:
the man-machine interface acquires any engineering value;
the PLC calculation module converts the engineering value into a voltage signal;
the isolation conversion module converts the voltage signal into a corresponding current signal;
the three-terminal isolation amplifier inputs a current signal into the valve cooling control system;
and acquiring an output value of the valve cooling control system through bus communication.
Further preferably, the testing method further comprises: alarm protection and trip protection, alarm protection and trip protection specifically do:
the man-machine interface acquires an alarm engineering value/a trip engineering value;
the PLC calculation module calculates the alarm value
Acquiring an output value of the conversion cooling system through bus communication;
the PLC calculation module matches the calculated output value with an alarm engineering value/trip engineering value;
alarm/trip if below or above this value.
Further preferably, the alarm value calculation formula is as follows:
instrument low alarm value = (low alarm set value-ultra low alarm set value) ÷ 2+ ultra low alarm set value;
the ultra-low alarm value = ultra-low alarm set value ÷ 2;
meter high alarm value = (ultra high alarm set value-high alarm set value) ÷ 2+ high alarm set value;
the meter ultra-high alarm value = (ultra-high alarm set value) ÷ 2+ ultra-high alarm set value.
Preferably, the voltage signal is 0-10V; the current signal is 4-20 mA. And 4-20 mA current signals are connected into a converter valve cooling control system through an aviation plug, so that the simulation of the field instrument is realized.
Compared with the prior art, the invention has the beneficial effects that: the protection instrument value of the converter valve cooling system can be accurately set, so that each verification test is closer to the actual operation condition, the accuracy and reliability of protection and inspection can be ensured, and the quality and efficiency of the protection and inspection work of the converter valve cooling system can be improved. The light modulation module of the converter valve cooling system testing device based on the control of the PLC computing module can truly simulate the light modulation communication between an upper computer and the converter valve cooling system. And the PLC calculation module displays the received equipment state and equipment alarm information related to the main circulating pump on a human-computer interface, and simulates the running state and control logic of the main circulating pump. The logic test technology of the main circulating pump controlled by the PLC computing module does not need to really start the main circulating pump, and is beneficial to protecting the mechanical seal and the bearing of the main pump.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a block diagram of a testing apparatus for a converter valve cooling system according to the present invention;
FIG. 2 is a schematic structural diagram of a testing device of a converter valve cooling system according to the present invention;
fig. 3 is a flow chart of a testing method of a testing device of a converter valve cooling system according to the invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate only the basic flow diagram of the invention, and therefore they show only the flow associated with the invention.
As shown in fig. 1, the invention is a testing device for a converter valve cooling system, and the device specifically comprises:
a testing device of a converter valve cooling system comprises a valve cooling testing system and a valve cooling control system 3; the valve cold test system comprises: the device comprises a computing module 1, a conversion module 2 and a communication module 4;
the computing module 1 is connected with the conversion module 2, and the conversion module 23 is connected with the valve cooling control system; the computing module 1 is connected with a communication module 4, and the communication module 4 is connected with the valve cooling control system 3.
As shown in fig. 2, a schematic structural diagram of a testing device of a converter valve cooling system is as follows:
preferably, the computing module 1 comprises: the system comprises a human-computer interface 5 and a PLC calculation module 6, wherein the human-computer interface 5 and the PLC calculation module 6 are communicated through the Ethernet.
Preferably, the conversion module 2 includes an isolation conversion module 7 and a three-terminal isolation amplifier 8, an input end of the isolation conversion module 7 is connected with an output end of the PLC calculation module 6 of the calculation module, an output end of the isolation conversion module 7 is connected with an input end of the three-terminal isolation amplifier 8, and an output end of the three-terminal isolation amplifier 8 is connected with an input end of the valve cooling control system 3.
Preferably, the communication module comprises two modes of bus communication and optical fiber communication.
Further preferably, the bus communication connects the PLC calculation module 6 with the valve cooling control system 3 through a bus coupler 9, and the bus communication is used for the valve cooling test system to receive the equipment state and the equipment alarm information of the valve cooling control system in real time.
Further preferably, the optical fiber communication module comprises two optical modulation modules, the first optical modulation module 10 is connected with the PLC calculation module, the second optical modulation module 11 is connected with the valve cooling control system 3, and the optical modulation modules are used for optical modulation communication between the valve cooling test system and the valve cooling control system.
The first light modulation module and the second light modulation module are used for: and (3) simulating by an upper computer, wherein the testing device of the converter valve cooling system designs an optical modulation module which is used for simulating the upper computer of the converter valve cooling system. The output of the light modulation module of the converter valve cooling system testing device is connected with the input of the light modulation module of the converter valve cooling system, and the input of the light modulation module of the converter valve cooling system testing device is connected with the output of the light modulation module of the converter valve cooling system. The converter valve cooling system testing device issues commands and states to the converter valve cooling system through the light modulation module, and the converter valve cooling system uploads the states to the converter valve cooling system testing device through the light modulation module.
The optical modulation signal: the method comprises the steps of sending signals including a remote start valve cooling system, a remote stop valve cooling system, a remote switch main circulating pump, a converter valve unlocking system, a converter valve locking system and a direct-current system available on a human-computer interface of a converter valve cooling system testing device, and sending signals including valve cooling system tripping, valve cooling system available, power request lowering, valve cooling system ready, valve cooling system redundancy capability and valve cooling system activation on the converter valve cooling system.
The light modulation module of the converter valve cooling system testing device based on PLC control can truly simulate the light modulation communication between an upper computer and the converter valve cooling system.
As shown in fig. 2, the present invention provides a testing method of a testing device of a converter valve cooling system, comprising:
the man-machine interface acquires any engineering value;
the PLC calculation module converts the engineering value into a voltage signal;
the isolation conversion module converts the voltage signal into a corresponding current signal;
the three-terminal isolation amplifier inputs a current signal into the valve cooling control system;
and acquiring an output value of the valve cooling control system through bus communication.
Further preferably, the testing method further comprises: alarm protection and trip protection, alarm protection and trip protection specifically do:
the man-machine interface acquires an alarm engineering value/a trip engineering value;
the PLC calculation module calculates the alarm value
Acquiring an output value of the conversion cooling system through bus communication;
the PLC calculation module matches the calculated output value with an alarm engineering value/trip engineering value;
alarm/trip if below or above this value.
Further preferably, the alarm value calculation formula is as follows:
instrument low alarm value = (low alarm set value-ultra low alarm set value) ÷ 2+ ultra low alarm set value;
the ultra-low alarm value = ultra-low alarm set value ÷ 2;
meter high alarm value = (ultra high alarm set value-high alarm set value) ÷ 2+ high alarm set value;
the meter ultra-high alarm value = (ultra-high alarm set value) ÷ 2+ ultra-high alarm set value.
Preferably, the voltage signal is 0-10V; the current signal is 4-20 mA.
The engineering value of a certain instrument is input through a human-computer interface, the PLC software converts the engineering value into a corresponding 0-10V voltage signal through calculation and outputs the voltage signal from an analog output module of the PLC, an isolation conversion module converts the 0-10V voltage signal received from the PLC analog module into a corresponding 4-20 mA current signal, and the 4-20 mA current signal is connected into a converter valve cooling control system through an aviation plug, so that the simulation of the field instrument is realized.
A converter valve cooling system testing device based on PLC control is used for testing a tripping protection logic, a main circulating pump logic and an optical modulation logic of a converter valve cooling system. The testing device simulates and generates required instrument data of flow, pressure, liquid level, temperature and the like and accesses the instrument data into the converter valve cooling system, and the numerical value of the instrument on site and the operation condition of the converter valve cooling system are simulated in real time. And analyzing the tripping protection fixed value and logic of the converter valve cooling system, and realizing the testing function of the tripping protection logic in the testing device. The control logic of a main circulating pump of the converter valve cooling system is analyzed, the state and fault information of the main circulating pump and relevant equipment are listed in a test device in a mode of reading a bus of the converter valve cooling system, and the control principle of the main circulating pump is determined. And simulating an optical modulation signal logic which is transmitted to a converter valve cooling system and a cooling system by an upper computer through an optical modulation module, and transmitting the optical modulation signal logic to the upper computer.
The above detailed description is specific to possible embodiments of the present invention, and the above embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention should be included in the present claims.
Claims (10)
1. A testing device for a converter valve cooling system comprises a valve cooling testing system and a valve cooling control system; it is characterized in that the valve cold test system comprises: the device comprises a calculation module, a conversion module and a communication module;
the computing module is connected with a conversion module, and the conversion module is connected with a valve cooling control system; the computing module is connected with the communication module, and the communication module is connected with the valve cooling control system.
2. The testing device for the cooling system of the converter valve according to claim 1, wherein the computing module comprises: the system comprises a human-computer interface and a PLC (programmable logic controller) calculation module, wherein the human-computer interface is communicated with the PLC calculation module through the Ethernet.
3. The testing device of the converter valve cooling system according to claim 1, wherein the conversion module comprises an isolation conversion module and a three-terminal isolation amplifier, an input end of the isolation conversion module is connected with an output end of a PLC calculation module of the calculation module, an output end of the isolation conversion module is connected with an input end of the three-terminal isolation amplifier, and an output end of the three-terminal isolation amplifier is connected with an input end of the valve cooling control system.
4. The testing device of the converter valve cooling system according to claim 1, wherein the communication module comprises two modes of bus communication and optical fiber communication.
5. The testing device of the converter valve cooling system according to claim 4, wherein the bus communication connects the PLC computing module with the valve cooling control system through a bus coupler, and the bus communication is used for the valve cooling testing system to receive equipment state and equipment alarm information of the valve cooling control system in real time.
6. The testing device of the converter valve cooling system according to claim 3, wherein the optical fiber communication comprises two optical modulation modules, the first optical modulation module is connected with the PLC computing module, the second optical modulation module is connected with the valve cooling control system, and the optical modulation modules are used for optical modulation communication between the valve cooling testing system and the valve cooling control system.
7. A testing method of a testing device of a converter valve cooling system is characterized by comprising the following steps:
the man-machine interface acquires any engineering value;
the PLC calculation module converts the engineering value into a voltage signal;
the isolation conversion module converts the voltage signal into a corresponding current signal;
the three-terminal isolation amplifier inputs a current signal into the valve cooling control system;
and acquiring an output value of the valve cooling control system through bus communication.
8. The method for testing the testing device of the converter valve cooling system according to claim 7, further comprising: alarm protection and trip protection, alarm protection and trip protection specifically do:
the man-machine interface acquires an alarm engineering value/a trip engineering value;
the PLC calculation module calculates the alarm value
Acquiring an output value of the conversion cooling system through bus communication;
the PLC calculation module matches the calculated output value with an alarm engineering value/trip engineering value;
alarm/trip if below or above this value.
9. The testing device for the cooling system of the converter valve according to claim 8, wherein the alarm value is calculated by the following formula:
instrument low alarm value = (low alarm set value-ultra low alarm set value) ÷ 2+ ultra low alarm set value;
the ultra-low alarm value = ultra-low alarm set value ÷ 2;
meter high alarm value = (ultra high alarm set value-high alarm set value) ÷ 2+ high alarm set value;
the meter ultra-high alarm value = (ultra-high alarm set value) ÷ 2+ ultra-high alarm set value.
10. The testing device for the cooling system of the converter valve according to claim 6, wherein the voltage signal is 0-10V; the current signal is 4-20 mA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911089290.0A CN110864924A (en) | 2019-11-08 | 2019-11-08 | Testing device and testing method for converter valve cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911089290.0A CN110864924A (en) | 2019-11-08 | 2019-11-08 | Testing device and testing method for converter valve cooling system |
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| CN110864924A true CN110864924A (en) | 2020-03-06 |
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| CN201911089290.0A Pending CN110864924A (en) | 2019-11-08 | 2019-11-08 | Testing device and testing method for converter valve cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113835980A (en) * | 2021-06-22 | 2021-12-24 | 国网宁夏电力有限公司检修公司 | Test system for valve cooling control protection system |
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| CN109669435A (en) * | 2018-11-30 | 2019-04-23 | 国网河南省电力公司检修公司 | A kind of high voltage direct current converter valve control system test device |
| CN209085859U (en) * | 2018-12-20 | 2019-07-09 | 乔小冬 | A kind of converter valve cooling system water-leakage detecting system |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104330275A (en) * | 2014-11-06 | 2015-02-04 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Fault analyzing and diagnosing device and method of converter valve cooling system |
| CN205102860U (en) * | 2015-11-06 | 2016-03-23 | 国家电网公司 | High voltage direct current change of current valve cooling system on -line measuring device |
| CN106849352A (en) * | 2017-01-09 | 2017-06-13 | 广州高澜节能技术股份有限公司 | Converter valve Control protection system comprising light modulation communication module |
| WO2018188750A1 (en) * | 2017-04-13 | 2018-10-18 | Abb Schweiz Ag | Arrangement for a power system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113835980A (en) * | 2021-06-22 | 2021-12-24 | 国网宁夏电力有限公司检修公司 | Test system for valve cooling control protection system |
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Application publication date: 20200306 |