CN106253220B - A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature - Google Patents
A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature Download PDFInfo
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- CN106253220B CN106253220B CN201610662733.0A CN201610662733A CN106253220B CN 106253220 B CN106253220 B CN 106253220B CN 201610662733 A CN201610662733 A CN 201610662733A CN 106253220 B CN106253220 B CN 106253220B
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- inner cold
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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Abstract
The present invention discloses a kind of converter valve cooling system inner cold water and enters the high guard method of valve temperature, valve-cooling control protects system to read DC current instantaneous value from pole control device, simultaneously from three inner cold waters enter valve temperature sensor in read inner cold water enter valve real-time temperature values, if the whole failures of three temperature sensors, valve-cooling control protection system sends trip signal, locking DC transmission system, otherwise a maximum temperature value is chosen as inner cold water enter valve temperature instantaneous value, valve temperature and DC current values are entered according to inner cold water, calculate the real-time junction temperature of converter valve thyristor, compare IGCT junction temperature value and junction temperature limits value, when IGCT junction temperature reaches that alarming value then sends out alarm signal, trip signal is then sent out when IGCT junction temperature reaches junction temperature limits value, locking DC transmission system.This method coordination control performance is good, adapts to use DC transmission system converter valve in the case of various voltage class and various DC loads.
Description
Technical field
Control field, more particularly to a kind of high pressure or extra-high voltage direct-current transmission are cooled down the present invention relates to power system converter valve
The method that system converter valve cooling system inner cold water enters the height protection of valve temperature.
Background technology
High pressure or extra-high voltage direct-current transmission are mainly constituted using Thyristors in series form at present with converter valve, its core member device
The working condition of part IGCT is intimately tied to the temperature of its chip (silicon), i.e. junction temperature.When junction temperature is raised, the dielectric properties of silicon
Weaken, fatigue resistance reduction, it is mainly shown as voltage endurance capability reduction, QRR increase and service life reduction
Deng.In a word, the junction temperature of IGCT had both influenceed the operational reliability of converter valve, and its service life is influenceed again.Run in IGCT
Cheng Zhong, the main loss produced that worked by chip itself of the temperature rise of thyristor chip causes.Therefore, high pressure or extra-high voltage direct-current are defeated
Electric thyristor valve takes away its working loss equipped with water-cooled resistance, enters while being configured with inner cold water in valve cooling system control protection
The height protection of valve temperature, but the common practice of domestic valve cooling system control protection equipment producer enters in valve port in inner cold water at present
Three temperature sensors are installed at cold water pipes, are then reported when the temperature of any two of which temperature sensor exceedes alarm setting value
It is alert, then locking DC transmission system during more than trip rating, to control IGCT steady-state operation junction temperature below 90 DEG C of limits value.
This converter valve cooling system inner cold water enters the high guard method of valve temperature and does not account for the actual on-state loss of IGCT, only considers volume
Determine the on-state loss under DC current operating mode.When DC transmission system is run under the following operating mode of nominal DC, this protection
Method reduces operation nargin；When DC transmission system runs (1.2 times of running overloads) under nominal DC above operating mode,
This guard method there may be the risk for causing IGCT junction temperature to exceed 90 DEG C of limits value, damages IGCT or shortens IGCT
Service life.
The content of the invention
It is an object of the invention to for above-mentioned problems of the prior art, propose a kind of raising mixed DC in parallel
The coordination control strategy of transmission system commutation failure defensive ability/resistance ability.
To reach the purpose of foregoing invention, the present invention is achieved through the following technical solutions：
A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature,
The valve cooling system includes valve-cooling control and protects system, and it is defeated that valve-cooling control protects system to introduce direct current from pole control equipment
The real-time DC current of electric system, and be connected with the three redundant temperature sensors signals set in inner cold water pipeline, the cold control of the valve
Protection system processed is to send alarm signal, send trip command locking DC transmission system；
The guard method includes：
After step 1, converter valve cooling system put into operation, valve-cooling control protection system reads inner cold water pipeline and entered three at valve
The temperature value of individual redundant temperature sensors, if temperature sensor sampling loop current value is less than 4mA or more than 20mA, recognizes
For the temperature sensor fault, otherwise it is assumed that the temperature sensor is normally run；
If step 2, three redundant temperature sensors are all normally run, one is chosen from three redundant temperature sensors
Individual maximum temperature value enters valve temperature as inner cold water in real time, i.e., enter valve temperature in real time
TνCW=MAX (B101, B102, B103), the temperature value of the first redundant temperature sensors, B102 tables are represented with B101
Show the temperature value of the second redundant temperature sensors, B103 represents the temperature value of triple redundance temperature sensor, MAX (B101,
B102, B103) then represent from the first temperature value that maximum is chosen into the temperature value of triple redundance temperature sensor；If one
Individual or two temperature sensor faults, a maximum temperature value is just chosen from remaining normal operating temperature sensor and is made
Enter valve temperature in real time for inner cold water；If three temperature sensors all failures, valve-cooling control protection system hair trip signal, locking
DC transmission system；
Step 3, the actual current value I for reading the DC transmission system poledH, calculate the real-time on-state of converter valve thyristor
P is lostTH0=(1.32V+0.29m Ω × IdH)×IdH/3；
Step 4, the real-time on-state loss P of converter valve thyristor calculated using step 3TH0And IGCT dynamic loss
PTH.dyn, the IGCT loss PTH.dynIt is only relevant with the model of IGCT, therefore in actual DC power transmission engineering, for one
Individual specific converter valve, its IGCT loss PTH.dynIt is a constant, calculates the active loss of converter valve thyristor：PTH.1=
PTH0+PTH.dyn；
Step 5, calculate IGCT knot to radiator thermal contact resistance and radiator to intake between it is thermal contact resistance and, obtain
Go out entire thermal resistance RTH, for a specific engineering, the thermal contact resistance and radiator of IGCT knot to radiator are between water inlet
Thermal contact resistance is all a constant, wherein, radiator is mainly relevant with the water velocity of inner cold water to the thermal contact resistance between water inlet；
Step 6, the result calculated according to step 2,4,5, the virtual junction temperature of converter valve thyristor is calculated using formula：
TνJ=T νCW+PTH.1·RTH；
If the virtual junction temperature Tv of step 7, converter valve thyristorJReach warning value, valve-cooling control protection system delay report
It is alert；If the virtual junction temperature Tv of converter valve thyristorJReach trip value, i.e. 90 DEG C of junction temperature limits value, valve-cooling control protection system
Delay hair trip signal, locking DC transmission system completes a cycle sex work, then returned when performing next periodic duty
To step 1.
Further, the DC transmission system conveying power where converter valve, the announcement of valve temperature is entered with valve cooling system inner cold water
Value and trip value are warned into inverse correlation relation.
Further, during DC transmission system running overload, automatic reduction inner cold water enters valve temperature height protection definite value, it is ensured that
IGCT junction temperature is no more than 90 DEG C of limits value, can simultaneously avoid damaging converter valve thyristor, extend IGCT service life.
A kind of converter valve cooling system inner cold water of the present invention enters the beneficial effect of the high guard method of valve temperature：
This method can read in real time inner cold water pipeline enter three redundant temperature sensors at valve temperature value and direct current it is defeated
The DC current of the electric system pole, finally calculates the real-time junction temperature of converter valve thyristor, and is compared with definite value, after delay
Make the selection of alarm or tripping operation；
This method is applicable the DC transmission engineering converter valve cooling system under various voltage class and various load conditions,
Valve cooling system operation nargin can be also improved simultaneously and the safe and stable operation of IGCT is protected, with very big converter valve cooling system
The application value for engineering of uniting.
Brief description of the drawings
Fig. 1 enters the FB(flow block) of the high guard method of valve temperature for a kind of converter valve cooling system inner cold water of the present invention.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described with reference to the accompanying drawings and examples, shown
So, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.
Embodiment
The present invention provides a kind of converter valve cooling system inner cold water and enters the high guard method of valve temperature, in converter valve charging operation
Before, converter valve cooling system is put into operation manually；After after converter valve charging operation, valve-cooling control protects system to control device from pole
It is middle reading DC current instantaneous value, while from three inner cold waters enter valve temperature sensor in read inner cold water enter valve real time temperature
Value, if the whole failures of three temperature sensors, valve-cooling control protection system sends trip signal, locking DC transmission system,
Otherwise a maximum temperature value being chosen as inner cold water and entering valve temperature instantaneous value, valve temperature and direct current are entered according to inner cold water
Flow valuve, calculates the real-time junction temperature of converter valve thyristor, compares after IGCT junction temperature value and junction temperature limits value, when IGCT junction temperature
Reach that alarming value then sends out alarm signal, trip signal, locking direct current transportation are then sent out when IGCT junction temperature reaches junction temperature limits value
System.
It is the FB(flow block) of the inventive method embodiment referring to Fig. 1, concrete implementation method comprises the following steps：
After step 1, converter valve cooling system put into operation, valve-cooling control protection system reads inner cold water pipeline and entered three at valve
The temperature value of individual redundant temperature sensors, if temperature sensor sampling loop current value is less than 4mA or more than 20mA, recognizes
For the temperature sensor fault, otherwise it is assumed that the temperature sensor is normally run；
If step 2, three redundant temperature sensors are all normally run, one is chosen from three redundant temperature sensors
Individual maximum temperature value enters valve temperature as inner cold water in real time, i.e., enter valve temperature T ν in real timeCW=MAX (B101, B102, B103),
First redundant temperature sensors are represented with B101, B102 represents the second redundant temperature sensors, and B103 represents triple redundance temperature
Sensor, MAX (B101, B102, B103) then represents to choose maximum into the temperature value of triple redundance temperature sensor from first
Temperature value；If one or two temperature sensor faults, just chosen from remaining normal operating temperature sensor
One maximum temperature value enters valve temperature as inner cold water in real time；If three temperature sensors all failures, valve-cooling control protection
System sends out trip signal, locking DC transmission system；
Step 3, the actual current value I for reading the DC transmission system poledH, calculate the real-time on-state of converter valve thyristor
P is lostTH0=(1.32V+0.29m Ω × IdH)×IdH/3；
Step 4, the real-time on-state loss P of converter valve thyristor calculated using step 3TH0And IGCT dynamic loss
PTH.dyn, the IGCT loss PTH.dynIt is only relevant with the model of IGCT, therefore in actual DC power transmission engineering, for one
Individual specific converter valve, its IGCT loss PTH.dynIt is a constant, calculates the active loss of converter valve thyristor：PTH.1=
PTH0+PTH.dyn；
Step 5, calculate IGCT knot to radiator thermal contact resistance and radiator to intake between it is thermal contact resistance and, obtain
Go out entire thermal resistance RTH, for a specific engineering, the thermal contact resistance and radiator of IGCT knot to radiator are between water inlet
Thermal contact resistance is all a constant, wherein, radiator is mainly relevant with the water velocity of inner cold water to the thermal contact resistance between water inlet；
Step 6, the result calculated according to step 2,4,5, the virtual junction temperature of converter valve thyristor is calculated using formula：
TνJ=T νCW+PTH.1·RTH；
If the virtual junction temperature Tv of step 7, converter valve thyristorJReach warning value, valve-cooling control protection system delay report
It is alert；If the virtual junction temperature Tv of converter valve thyristorJReach trip value, i.e. 90 DEG C of junction temperature limits value, valve-cooling control protection system
Delay hair trip signal, locking DC transmission system completes a cycle sex work, performs next cycle sex work and then enters
Enter step 1.
As one embodiment, the DC transmission system conveying power where converter valve enters valve with valve cooling system inner cold water
The warning value of temperature and trip value are into inverse correlation relation, as DC transmission system conveys power difference, valve cooling system inner cold water
The warning value and trip value for entering valve temperature are all different, conveying power it is lower enter valve temperature warning value and trip value it is higher.
As one embodiment, during DC transmission system running overload, automatic reduction inner cold water enters the height protection of valve temperature
Definite value, it is ensured that IGCT junction temperature is no more than 90 DEG C of limits value, can avoid damaging converter valve thyristor, extension IGCT makes simultaneously
Use the life-span.
Above-described embodiment only not limits technical scheme described in the invention to illustrate the present invention；Therefore, although
This specification is with reference to each above-mentioned embodiment to present invention has been detailed description, still, the ordinary skill of this area
Personnel should be appreciated that still can modify or equivalent substitution to the present invention；And all do not depart from the present invention spirit and
The technical scheme of scope and its improvement, it all should cover among scope of the presently claimed invention.
Claims (3)
1. a kind of converter valve cooling system inner cold water enters the high guard method of valve temperature, it is characterised in that
The valve cooling system includes valve-cooling control and protects system, and valve-cooling control protects system to introduce DC power transmission system from pole control equipment
Unite real-time DC current, and be connected with the three redundant temperature sensors signals set in inner cold water pipeline, the valve-cooling control is protected
Protecting system is to send alarm signal, send trip command locking DC transmission system；
The guard method includes：
After step 1, converter valve cooling system put into operation, valve-cooling control protection system read inner cold water pipeline enter at valve three it is superfluous
The temperature value of remaining temperature sensor, if temperature sensor sampling loop current value is less than 4mA or more than 20mA, then it is assumed that should
Temperature sensor fault, otherwise it is assumed that the temperature sensor is normally run；
If step 2, three redundant temperature sensors are all normally run, one is chosen from three redundant temperature sensors most
Big temperature value enters valve temperature T ν as inner cold water in real timeCW；If one or two temperature sensor faults, just from remaining
Normal operating temperature sensor in choose a maximum temperature value enter valve temperature in real time as inner cold water；If three temperature
Sensor all failures, valve-cooling control protection system hair trip signal, locking DC transmission system；
Step 3, the actual current value I for reading the DC transmission system poledH, calculate the real-time on-state loss of converter valve thyristor
PTH0=(1.32V+0.29m Ω × IdH)×IdH/3；
Step 4, the real-time on-state loss P of converter valve thyristor calculated using step 3TH0And IGCT dynamic loss
PTH.dyn, calculate the active loss P of converter valve thyristorTH.1=PTH0+PTH.dyn；
Step 5, calculate IGCT knot to radiator thermal contact resistance and radiator to intake between it is thermal contact resistance and, draw always
Thermal resistance RTH, for a specific engineering, the thermal contact resistance and radiator of IGCT knot to radiator to the contact between water inlet
Thermal resistance is all a constant, wherein, radiator is mainly relevant with the water velocity of inner cold water to the thermal contact resistance between water inlet；
Step 6, the result calculated according to step 2,4,5, the virtual junction temperature T ν of converter valve thyristor are calculated using formulaJ=T
νCW+PTH.1·RTH；
If the virtual junction temperature Tv of step 7, converter valve thyristorJReach warning value, valve-cooling control protection system delay alarm；Such as
The virtual junction temperature Tv of fruit converter valve thyristorJReach trip value, i.e. 90 DEG C of junction temperature limits value, valve-cooling control protection system delay hair
Trip signal, locking DC transmission system completes a cycle sex work, and step is then returned to when performing next periodic duty
1。
2. converter valve cooling system inner cold water according to claim 1 enters the high guard method of valve temperature, it is characterised in that change
The DC transmission system conveying power where valve is flowed, the warning value and trip value of valve temperature are entered into anti-phase with valve cooling system inner cold water
Pass relation.
3. converter valve cooling system inner cold water according to claim 2 enters the high guard method of valve temperature, it is characterised in that straight
When flowing transmission system running overload, automatic reduction inner cold water enters valve temperature height protection definite value, it is ensured that IGCT junction temperature is no more than
90 DEG C of limits value.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662733.0A CN106253220B (en) | 2016-08-12 | 2016-08-12 | A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature |
| PCT/CN2016/111521 WO2018028114A1 (en) | 2016-08-12 | 2016-12-22 | Inner cold water entrance valve temperature high protection method for valve cooling system of converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662733.0A CN106253220B (en) | 2016-08-12 | 2016-08-12 | A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106253220A CN106253220A (en) | 2016-12-21 |
| CN106253220B true CN106253220B (en) | 2017-11-07 |
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| CN201610662733.0A Active CN106253220B (en) | 2016-08-12 | 2016-08-12 | A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature |
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| CN (1) | CN106253220B (en) |
| WO (1) | WO2018028114A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253220B (en) * | 2016-08-12 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature |
| CN108521213A (en) * | 2018-03-27 | 2018-09-11 | 特变电工新疆新能源股份有限公司 | A kind of converter valve cooling system and cooling means |
| CN108955910A (en) * | 2018-06-06 | 2018-12-07 | 无锡应达工业有限公司 | A kind of temperature control sensor component with alarm indication function |
| CN109546643B (en) * | 2018-10-24 | 2020-10-02 | 中国南方电网有限责任公司超高压输电公司广州局 | Direct-current load limiting protection method based on cooling capacity of converter station valve cooling system |
| CN112164209B (en) * | 2020-08-20 | 2021-10-08 | 中国南方电网有限责任公司超高压输电公司广州局 | Method and system for predicting temperature of converter valve element of converter station |
| CN113514166B (en) * | 2021-03-03 | 2024-06-18 | 中国南方电网有限责任公司超高压输电公司天生桥局 | HVDC converter valve thyristor temperature monitoring method and system |
| CN115498853B (en) * | 2022-10-12 | 2024-05-24 | 南方电网科学研究院有限责任公司 | Detection method for inlet valve flow protection function of flexible straight valve cold control protection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6185116B1 (en) * | 1997-06-11 | 2001-02-06 | Abb Ab | HVDC power transmission system with cooling and switching device temperature detection |
| CN101634866A (en) * | 2009-02-10 | 2010-01-27 | 广州市高澜水技术有限公司 | Control system of pure water cooling device of high voltage direct current (HVDC) transmission converter valve |
| CN102566623A (en) * | 2012-01-04 | 2012-07-11 | 广州高澜节能技术股份有限公司 | Control system of direct current power transmission converter valve pure water cooling device |
| CN202712816U (en) * | 2012-08-17 | 2013-01-30 | 中国南方电网有限责任公司超高压输电公司 | Control system of valve cooling system of converter station |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1977496A4 (en) * | 2006-01-23 | 2011-01-05 | Abb Technology Ltd | A converter station and a method for control thereof |
| CN106253220B (en) * | 2016-08-12 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature |
-
2016
- 2016-08-12 CN CN201610662733.0A patent/CN106253220B/en active Active
- 2016-12-22 WO PCT/CN2016/111521 patent/WO2018028114A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6185116B1 (en) * | 1997-06-11 | 2001-02-06 | Abb Ab | HVDC power transmission system with cooling and switching device temperature detection |
| CN101634866A (en) * | 2009-02-10 | 2010-01-27 | 广州市高澜水技术有限公司 | Control system of pure water cooling device of high voltage direct current (HVDC) transmission converter valve |
| CN102566623A (en) * | 2012-01-04 | 2012-07-11 | 广州高澜节能技术股份有限公司 | Control system of direct current power transmission converter valve pure water cooling device |
| CN202712816U (en) * | 2012-08-17 | 2013-01-30 | 中国南方电网有限责任公司超高压输电公司 | Control system of valve cooling system of converter station |
Non-Patent Citations (1)
| Title |
|---|
| 基于PID的换流阀水冷***温度控制研究;易映萍等;《信息技术》;20150331(第3期);第29-32页 * |
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| Publication number | Publication date |
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| WO2018028114A1 (en) | 2018-02-15 |
| CN106253220A (en) | 2016-12-21 |
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