CN106253220A - A kind of converter valve cooling system inner cold water enters valve temperature height guard method - Google Patents
A kind of converter valve cooling system inner cold water enters valve temperature height guard method Download PDFInfo
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- CN106253220A CN106253220A CN201610662733.0A CN201610662733A CN106253220A CN 106253220 A CN106253220 A CN 106253220A CN 201610662733 A CN201610662733 A CN 201610662733A CN 106253220 A CN106253220 A CN 106253220A
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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 open a kind of converter valve cooling system inner cold water of the present invention enters valve temperature height guard method, valve-cooling control protection system reads DC current instantaneous value from pole control device, enter valve temperature sensor is read inner cold water from three inner cold waters simultaneously and enter valve real-time temperature values, if three whole faults of temperature sensor, valve-cooling control protection system sends trip signal, locking DC transmission system, otherwise choose a maximum temperature value and enter valve temperature instantaneous value as inner cold water, valve temperature and DC current values is entered according to inner cold water, calculate the real-time junction temperature of converter valve thyristor, relatively IGCT junction temperature value and junction temperature limits value, alarm signal is then sent out when IGCT junction temperature reaches alarming value, trip signal is then sent out when IGCT junction temperature reaches junction temperature limits value, locking DC transmission system.It is good that this method coordinates control performance, uses DC transmission system converter valve in the case of adapting to various electric pressure and various DC load.
Description
Technical field
The present invention relates to power system converter valve cooling control field, particularly relate to a kind of high pressure or extra-high voltage direct-current transmission
System converter valve cooling system inner cold water enters the method for valve temperature height protection.
Background technology
High pressure or extra-high voltage direct-current transmission converter valve currently mainly use Thyristors in series form to form, its core unit device
The duty of part IGCT is intimately tied to the temperature of its chip (silicon), i.e. junction temperature.When junction temperature raises, the dielectric properties of silicon
Weakening, fatigue resistance reduces, and it mainly shows as, and voltage endurance capability reduces, QRR increases and service life reduces
Deng.In a word, the junction temperature of IGCT had both affected the operational reliability of converter valve, affected again its service life.Ran at IGCT
Cheng Zhong, the loss that the temperature rise of thyristor chip is mainly produced by chip self work causes.Therefore, high pressure or extra-high voltage direct-current are defeated
Electricity thyristor valve is furnished with water-cooled resistance and its working loss is taken away, and is configured with inner cold water simultaneously and enters in valve cooling system controls protection
Valve temperature height is protected, but current domestic valve cooling system controls the common practice of protection equipment manufacturer in inner cold water enters valve port
Install three temperature sensors at cold water pipes, then report when the temperature of any two of which temperature sensor exceedes alarm setting value
Alert, then locking DC transmission system when exceeding trip rating, to control IGCT steady-state operation junction temperature limits value less than 90 DEG C.
This converter valve cooling system inner cold water enters valve temperature height guard method and does not accounts 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 runs 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 the above operating mode of nominal DC,
This guard method there may be the risk causing IGCT junction temperature to exceed limits value 90 DEG C, damages IGCT or shortens IGCT
Service life.
Summary of the invention
Present invention aims to above-mentioned problems of the prior art, propose one and improve mixed DC in parallel
The coordination control strategy of transmission system commutation failure defensive ability/resistance ability.
For reaching 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 valve temperature height guard method,
Described valve cooling system includes that valve-cooling control protects system, and it is defeated that valve-cooling control protection system introduces direct current from pole control equipment
The electricity real-time DC current of system, and be connected with three the redundant temperature sensors signals set in inner cold water pipeline, the cold control of described valve
Protection system processed is in order to send alarm signal, to send trip command locking DC transmission system；
Described guard method includes:
After step 1, converter valve cooling system put into operation, valve-cooling control protection system reads inner cold water pipeline and enters at valve three
The temperature value of individual redundant temperature sensors, if temperature sensor sampling loop current value is less than 4mA or more than 20mA, then recognizes
For this temperature sensor fault, otherwise it is assumed that this temperature sensor is properly functioning；
If three redundant temperature sensors of step 2 are the most properly functioning, then from three redundant temperature sensors, choose one
The temperature value of individual maximum enters valve temperature in real time as inner cold water, enters valve temperature the most in real time
TνCW=MAX (B101, B102, B103), represents the temperature value of the first redundant temperature sensors, B102 table with B101
Showing 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 the temperature value choosing maximum from the temperature value of first to triple redundance temperature sensor；If having one
Individual or two temperature sensor fault, just choose a maximum temperature value from remaining normal operating temperature sensor and make
Valve temperature is entered in real time for inner cold water；If three temperature sensor all faults, valve-cooling control protection system sends out trip signal, locking
DC transmission system；
Step 3, actual current value I of reading this pole of DC transmission systemdH, calculate the real-time on-state of converter valve thyristor
Loss PTH0=(1.32V+0.29m Ω × IdH)×IdH/3；
Step 4, the converter valve thyristor utilizing step 3 to calculate real-time on-state loss PTH0And IGCT dynamic loss
PTH.dyn, described IGCT loss PTH.dynThe most relevant with the model of IGCT, therefore in actual DC power transmission engineering, for one
Individual concrete 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 tie the thermal contact resistance of radiator and radiator to the thermal contact resistance between water inlet and, must
Go out entire thermal resistance RTH, for a specific engineering, IGCT ties the thermal contact resistance of radiator and radiator between water inlet
Thermal contact resistance is all a constant, and wherein, the thermal contact resistance between radiator to water inlet is the most relevant with the water velocity of inner cold water；
Step 6, according to step 2,4,5 results calculated, utilize formula to calculate the virtual junction temperature of converter valve thyristor:
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
Alert；If the virtual junction temperature Tv of converter valve thyristorJReach trip value, i.e. junction temperature limits value 90 DEG C, valve-cooling control protection system
Trip signal, locking DC transmission system are sent out in time delay, complete a periodic duty, perform then to return during next periodic duty
To step 1.
Further, the DC transmission system conveying power at converter valve place, with the announcement that valve cooling system inner cold water enters valve temperature
Alert value becomes inverse correlation relation with trip value.
Further, during DC transmission system running overload, automatically reduce inner cold water and enter valve temperature height protection definite value, it is ensured that
IGCT junction temperature is less than limits value 90 DEG C, can avoid damaging converter valve thyristor simultaneously, extend IGCT service life.
A kind of converter valve cooling system inner cold water of the present invention enters valve temperature height guard method and provides the benefit that:
The method can read inner cold water pipeline in real time and enter the temperature value of three redundant temperature sensors at valve and direct current is defeated
The DC current of electricity this pole of system, finally calculates the real-time junction temperature of converter valve thyristor, and compares with definite value, after time delay
Make and reporting to the police or the selection of tripping operation；
The method is suitable for the DC transmission engineering converter valve cooling system under various electric pressure and various load condition,
Also can improve valve cooling system simultaneously and run nargin and the safe and stable operation of protection IGCT, there is very big converter valve cooling system
The using value of system engineering.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) that a kind of converter valve cooling system inner cold water of the present invention enters valve temperature height guard method.
Detailed description of the invention
With embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described below in conjunction with the accompanying drawings, aobvious
So, described embodiment is only a part of embodiment of the present invention rather than whole embodiment.
Embodiment
The present invention provides a kind of converter valve cooling system inner cold water to enter valve temperature height guard method, at converter valve charging operation
Before, manually converter valve cooling system is put into operation；After converter valve charging operation, valve-cooling control protection system controls device from pole
Middle reading DC current instantaneous value, enters reading inner cold water valve temperature sensor from three inner cold waters simultaneously and enters valve real time temperature
Value, if three whole faults of temperature sensor, valve-cooling control protection system sends trip signal, locking DC transmission system,
Otherwise choose a maximum temperature value and enter valve temperature instantaneous value as inner cold water, enter valve temperature and unidirectional current according to inner cold water
Flow valuve, calculates the real-time junction temperature of converter valve thyristor, after comparing IGCT junction temperature value and junction temperature limits value, when IGCT junction temperature
Reach alarming value and then send out alarm signal, then send out trip signal, locking direct current transportation when IGCT junction temperature reaches junction temperature limits value
System.
Referring to Fig. 1, for the FB(flow block) of the inventive method embodiment, concrete implementation method comprises the steps:
After step 1, converter valve cooling system put into operation, valve-cooling control protection system reads inner cold water pipeline and enters at valve three
The temperature value of individual redundant temperature sensors, if temperature sensor sampling loop current value is less than 4mA or more than 20mA, then recognizes
For this temperature sensor fault, otherwise it is assumed that this temperature sensor is properly functioning；
If three redundant temperature sensors of step 2 are the most properly functioning, then from three redundant temperature sensors, choose one
The temperature value of individual maximum enters valve temperature in real time as inner cold water, enters valve temperature T ν the most in real timeCW=MAX (B101, B102, B103),
Representing the first redundant temperature sensors with B101, B102 represents the second redundant temperature sensors, and B103 represents triple redundance temperature
Sensor, MAX (B101, B102, B103) then represents and chooses maximum from the temperature value of first to triple redundance temperature sensor
Temperature value；If there being one or two temperature sensor fault, just choose from remaining normal operating temperature sensor
One maximum temperature value enters valve temperature in real time as inner cold water；If three temperature sensor all faults, valve-cooling control is protected
System sends out trip signal, locking DC transmission system；
Step 3, actual current value I of reading this pole of DC transmission systemdH, calculate the real-time on-state of converter valve thyristor
Loss PTH0=(1.32V+0.29m Ω × IdH)×IdH/3；
Step 4, the converter valve thyristor utilizing step 3 to calculate real-time on-state loss PTH0And IGCT dynamic loss
PTH.dyn, described IGCT loss PTH.dynThe most relevant with the model of IGCT, therefore in actual DC power transmission engineering, for one
Individual concrete 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 tie the thermal contact resistance of radiator and radiator to the thermal contact resistance between water inlet and, must
Go out entire thermal resistance RTH, for a specific engineering, IGCT ties the thermal contact resistance of radiator and radiator between water inlet
Thermal contact resistance is all a constant, and wherein, the thermal contact resistance between radiator to water inlet is the most relevant with the water velocity of inner cold water；
Step 6, according to step 2,4,5 results calculated, utilize formula to calculate the virtual junction temperature of converter valve thyristor:
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
Alert；If the virtual junction temperature Tv of converter valve thyristorJReach trip value, i.e. junction temperature limits value 90 DEG C, valve-cooling control protection system
Trip signal, locking DC transmission system are sent out in time delay, complete a periodic duty, perform next cycle sex work and then enter
Enter step 1.
As an embodiment, the DC transmission system conveying power at converter valve place, enter valve with valve cooling system inner cold water
The warning value of temperature becomes inverse correlation relation with trip value, along with DC transmission system conveying power is different, and valve cooling system inner cold water
The warning value and the trip value that enter valve temperature are the most different, conveying power the lowest enter valve temperature warning value and trip value the highest.
As an embodiment, during DC transmission system running overload, automatically reduce inner cold water and enter the protection of valve temperature height
Definite value, it is ensured that IGCT junction temperature is less than limits value 90 DEG C, can avoid damaging converter valve thyristor simultaneously, extends IGCT and makes
Use the life-span.
Above-described embodiment is only in order to illustrate the present invention and and unrestricted technical scheme described in the invention；Therefore, although
This specification with reference to each above-mentioned embodiment to present invention has been detailed description, but, the ordinary skill of this area
Personnel should be appreciated that and still can modify the present invention or equivalent；And all without departing from the present invention spirit and
The technical scheme of scope and improvement thereof, it all should be contained in the middle of scope of the presently claimed invention.
Claims (3)
1. a converter valve cooling system inner cold water enters valve temperature height guard method, it is characterised in that
Described valve cooling system includes that valve-cooling control protects system, valve-cooling control protection system to introduce DC power transmission system from pole control equipment
Uniting real-time DC current, and be connected with three the redundant temperature sensors signals set in inner cold water pipeline, described valve-cooling control is protected
Protecting system is in order to send alarm signal, to send trip command locking DC transmission system；
Described 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 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 this temperature sensor is properly functioning；
If three redundant temperature sensors of step 2 are the most properly functioning, then from three redundant temperature sensors, choose one
Big temperature value enters valve temperature T ν in real time as inner cold waterCW；If there being one or two temperature sensor fault, just from remaining
Normal operating temperature sensor in choose a maximum temperature value and enter valve temperature as inner cold water in real time；If three temperature
Sensor all faults, valve-cooling control protection system sends out trip signal, locking DC transmission system；
Step 3, actual current value I of reading this pole of DC transmission systemdH, calculate the real-time on-state loss of converter valve thyristor
PTH0=(1.32V+0.29m Ω × IdH)×IdH/3；
Step 4, the converter valve thyristor utilizing step 3 to calculate real-time on-state loss PTH0And IGCT dynamic loss
PTH.dyn, calculate the active loss P of converter valve thyristorTH.1=PTH0+PTH.dyn；
Step 5, calculate IGCT tie the thermal contact resistance of radiator and radiator to the thermal contact resistance between water inlet and, always draw
Thermal resistance RTH, for a specific engineering, IGCT ties the thermal contact resistance of radiator and radiator to the contact between water inlet
Thermal resistance is all a constant, and wherein, the thermal contact resistance between radiator to water inlet is the most relevant with the water velocity of inner cold water；
Step 6, according to step 2,4,5 results calculated, utilize formula to calculate the virtual junction temperature T ν of converter valve thyristorJ=T
νCW+PTH.1·RTH；
If the virtual junction temperature Tv of step 7 converter valve thyristorJReaching warning value, valve-cooling control protection system delay is reported to the police；As
The really virtual junction temperature Tv of converter valve thyristorJReaching trip value, i.e. junction temperature limits value 90 DEG C, valve-cooling control protection system delay is sent out
Trip signal, locking DC transmission system, complete a periodic duty, when performing next periodic duty, then return to step
1。
Converter valve cooling system inner cold water the most according to claim 1 enters valve temperature height guard method, it is characterised in that change
The DC transmission system conveying power at stream valve place, the warning value and the trip value that enter valve temperature with valve cooling system inner cold water become anti-phase
Pass relation.
Converter valve cooling system inner cold water the most according to claim 2 enters valve temperature height guard method, it is characterised in that straight
During stream transmission system running overload, automatically reduce inner cold water and enter valve temperature height protection definite value, it is ensured that IGCT junction temperature is less than
Limits value 90 DEG C.
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 true CN106253220A (en) | 2016-12-21 |
| CN106253220B CN106253220B (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
Country Status (2)
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| CN (1) | CN106253220B (en) |
| WO (1) | WO2018028114A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018028114A1 (en) * | 2016-08-12 | 2018-02-15 | 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 | Inner cold water entrance valve temperature high protection method for valve cooling system of converter valve |
| CN109546643A (en) * | 2018-10-24 | 2019-03-29 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of DC load limitation guard method based on Converter Station Valve cooling system cooling capacity |
| CN113514166A (en) * | 2021-03-03 | 2021-10-19 | 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 |
| CN115498853A (en) * | 2022-10-12 | 2022-12-20 | 南方电网科学研究院有限责任公司 | Detection method for inlet valve flow protection function of soft straight valve cold control protection system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
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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
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018028114A1 (en) * | 2016-08-12 | 2018-02-15 | 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 | Inner cold water entrance valve temperature high protection method for valve cooling system of converter valve |
| CN109546643A (en) * | 2018-10-24 | 2019-03-29 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of DC load limitation guard method based on Converter Station Valve cooling system cooling capacity |
| CN113514166A (en) * | 2021-03-03 | 2021-10-19 | 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 |
| CN115498853A (en) * | 2022-10-12 | 2022-12-20 | 南方电网科学研究院有限责任公司 | Detection method for inlet valve flow protection function of soft straight valve cold control protection 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018028114A1 (en) | 2018-02-15 |
| CN106253220B (en) | 2017-11-07 |
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