CN105005007A - Fault detection apparatus of redundant auxiliary power system and method thereof - Google Patents
Fault detection apparatus of redundant auxiliary power system and method thereof Download PDFInfo
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Abstract
The invention provides a fault detection apparatus of redundant auxiliary power system and a method thereof. The apparatus comprises a first auxiliary power supply and a second auxiliary power supply, wherein the two power supplies are connected in parallel. The apparatus is characterized in that the apparatus also consists of a first temperature sampling unit, a second temperature sampling unit, a detection control unit and an alarm unit. Whether faults occur at the first auxiliary power supply and the second auxiliary power supply can be determined by detecting a cooling system temperature of the first auxiliary power supply and a cooling system temperature of the second auxiliary power supply. The detection apparatus is simple; no extra fault detection circuit needs to be added; and the operation can be controlled only by a detection control unit. According to the fault detection method, detection is carried out based on a relation between a working mode and a power board cooling component temperature; the method is simple and practical; and a further technical guarantee can be provided for a high-power electrical equipment system based on dual-source power supply.
Description
Technical field
The present invention relates to redundancy secondary power system, be specifically related to a kind of redundancy secondary power system failure detector and method.
Background technology
The accessory power supply of current high-power electrical equipment (as high power UPS power-supply unit) designs usual dual power supply backup design, 2 independently identical accessory power supply input is in parallel, output-parallel uses, object improves the reliability of power supply, when an accessory power supply cannot be powered extremely, another one accessory power supply can also work on, and this provides double shield with regard to the accessory power supply for high-power electrical equipment, and accessory power supply is all the power supply adopting the one group of isolation of inverse-excitation type AC/DC circuit evolving usually, such as+24V/0V or+15V/0V, in order to ensure the stability of supply voltage, usually controlled as Voltage Feedback by+24V or+15V, feed back to Energy control IC, such as 3845 etc., output-parallel is actual be mutually isolated by diode after be parallel to together, power supply now after parallel connection still+24V/0V or+15V/0V, become the isolation of some other electric pressure or non-isolated power supply to supply UPS equipment inside by these Power convert again to use as accessory power supply, greatly can reduce the infringement that power fail brings like this, + 24V/0V is generated for each accessory power supply, in actual use due to the discrete type of component parameter, although output-parallel together, but only have a road accessory power supply+24V/0V to have power stage during work, and an other road accessory power supply is in holding state always, when there being that group power fail of power stage, other one group of+24V/0V being in holding state devotes oneself to work at once, realize the uninterrupted power supply of secondary power system, so the output voltage of 2 groups of accessory power supplys can be able to be made to change among a small circle by regulation voltage feedback parameter, thus 2 groups of electrical source exchange work can be made, such as A group has power stage, B group inactivity output switching is that A group inactivity exports, B group has power stage, 2 groups of accessory power supply switch operatings, the service condition of such power device reaches unanimity substantially, improves serviceable life, slows down power device aging speed, reduces the generation of probability of malfunction.
But in switch operating engineering, control system control A road accessory power supply is in work, i.e. output power, control B road accessory power supply is in holding state, i.e. no-output power, if but A accessory power supply damages, cannot power stage be provided, actual work or B road accessory power supply, in any case and control to be all that B accessory power supply is in work, now need A road power fail be detected and alarm, inform that user changes A road power supply in time.
The judgement of prior art to accessory power supply fault needs extra circuit, and the electric current of usually need to sample respectively accessory power supply A, accessory power supply B, cost is higher.
Summary of the invention
Set forth for above-mentioned analysis, in order to ensure reliability, the intellectuality of secondary power system further, the present invention devises a kind of failure detector and method thereof of redundancy accessory power supply, and whether Real-Time Monitoring breaks down, so that can alarm in time.
The present invention realizes by the following technical solutions: a kind of redundancy secondary power system failure detector, comprise the first accessory power supply, the second accessory power supply in parallel, it is characterized in that: also comprise the first temperature sampling unit, the second temperature sampling unit, detection control unit and an Alarm Unit, the temperature signal obtained of sampling for gathering the cooling system temperature of the first accessory power supply, and is fed back to detection control unit by described first temperature sampling unit; The temperature signal obtained of sampling for gathering the cooling system temperature of the second accessory power supply, and is fed back to detection control unit by described second temperature sampling unit; Described Alarm Unit is used for the fault warning of the first accessory power supply or the second accessory power supply, and warning information is fed back to detection control unit; Described detection control unit is for controlling the first accessory power supply, the second accessory power supply alternation, and judge the first accessory power supply according to the cooling system temperature of the first accessory power supply, the cooling system temperature of the second accessory power supply, whether the second accessory power supply break down, when described first accessory power supply or the second accessory power supply break down, send alarm signal to described Alarm Unit.
In an embodiment of the present invention, described detection control unit for controlling the first accessory power supply, the implementation of the second accessory power supply alternation is: regulate the output voltage of the first accessory power supply higher than the output voltage of the second accessory power supply, make the first accessory power supply have power output in duty, the second accessory power supply is in holding state; Regulate the output voltage of the second accessory power supply higher than the output voltage of the first accessory power supply, make the second accessory power supply have power output in duty, the first accessory power supply is in holding state.
Further, the Voltage loop reference value regulating the output voltage of the first accessory power supply to be greater than the second accessory power supply higher than the output voltage of the second accessory power supply by the Voltage loop reference value that described detection control unit controls the first accessory power supply realizes; The Voltage loop reference value regulating the output voltage of the second accessory power supply to be less than the second accessory power supply higher than the output voltage of the first accessory power supply by the Voltage loop reference value that described detection control unit controls the first accessory power supply realizes.
The present invention also provides a kind of fault detection method based on above-mentioned redundancy secondary power system failure detector, it is characterized in that: comprise the following steps: step S1: at current operating cycle, detection control unit control system enters first mode duty, described first mode duty is that control first accessory power supply is in mode of operation, the second accessory power supply is in standby mode, enters step S2 after first mode duty work a period of time; Step S2: gather N point first accessory power supply cooling system temperature Ta1, Ta2 ... TaN and N point second accessory power supply cooling system temperature Tb1, Tb2 ... TbN, and obtain mean value TA, TB respectively, wherein
,
, N is natural number; Step S3: judge whether TA-TB is more than or equal to
if then enter step S4, otherwise judge the first accessory power supply fault, described detection control unit sends alarm signal to Alarm Unit, carries out fault warning by Alarm Unit,
for being greater than the temperature threshold of 0; Step S4: judge whether system is in first mode duty, if then go to step S5, otherwise go to step S2; Step S5: enter the next work period, detection control unit control system enters the second mode state, described second mode state is that control first accessory power supply is in standby mode, the second accessory power supply is in mode of operation, enters step S6 after after mode state work a period of time; Step S6: gather N point first accessory power supply cooling system temperature Ta1, Ta2 ... TaN and N point second accessory power supply cooling system temperature Tb1, Tb2 ... TbN, and obtain mean value TA, TB respectively, wherein
,
, N is natural number; Step S7: judge whether TB-TA is more than or equal to
if then enter step S8, otherwise judge the second accessory power supply fault, described detection control unit sends alarm signal to Alarm Unit, carries out fault warning by Alarm Unit;
for being greater than the temperature threshold of 0; Step S8: judge whether system is in the second mode state, if then go to step S1, otherwise go to step S6.
Further, first mode duty work a period of time is 3-10min;
Further, second mode state work a period of time was 3-10min;
In an embodiment of the present invention, the first mode of operation described in step S1 is realized by the output voltage of the adjustment first accessory power supply output voltage higher than the second accessory power supply; In step S5, the second work pattern is realized by the output voltage of the adjustment second accessory power supply output voltage higher than the first accessory power supply.
Further, the Voltage loop reference value regulating the output voltage of the first accessory power supply to be greater than the second accessory power supply higher than the output voltage of the second accessory power supply by the Voltage loop reference value that control module controls the first accessory power supply realizes; The Voltage loop reference value regulating the output voltage of the second accessory power supply to be less than the one the second accessory power supplys higher than the output voltage of the first accessory power supply by the Voltage loop reference value that control module controls the first accessory power supply realizes.
Compared with prior art, the beneficial effect of the present invention's a kind of redundancy secondary power system failure detector and method is: judge whether first, second accessory power supply breaks down by the cooling system temperature of the cooling system temperature and the second accessory power supply that detect the first accessory power supply, pick-up unit is simple, additionally need not increase failure detector circuit, only need be realized by detection control unit; In fault detection method, the main relation of mode of operation and power panel thermal component temperature of using detects, and method simple practical, especially for the high-power electrical equipment system of dual power supply, provides further technical guarantee.
Accompanying drawing explanation
Fig. 1 is a kind of redundancy secondary power system failure detector theory diagram of the present invention.
Fig. 2 is the process flow diagram of a kind of redundancy secondary power system fault detection method of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
The invention provides a kind of redundancy secondary power system failure detector, comprise the first accessory power supply A, the second accessory power supply B in parallel, it is characterized in that: also comprise the first temperature sampling unit A, the second temperature sampling unit B, detection control unit and an Alarm Unit, the temperature signal obtained of sampling for gathering the cooling system temperature of the first accessory power supply A, and is fed back to detection control unit by described first temperature sampling unit A; Described second temperature sampling unit B is for gathering the cooling system temperature of the second accessory power supply B, and the temperature signal obtained of sampling feeds back to detection control unit; Described Alarm Unit is used for the fault warning of the first accessory power supply A or the second accessory power supply B, and alarm signal feeds back to detection control unit; Described detection control unit is for controlling the first accessory power supply A, the second accessory power supply B alternation, judge the first accessory power supply A according to the cooling system temperature of the first accessory power supply A, the cooling system temperature of the second accessory power supply B, whether the second accessory power supply B break down, once one breaks down in the first accessory power supply A, the second accessory power supply B, send alarm signal to Alarm Unit.Its schematic diagram of device is see Fig. 1.
Described detection control unit is for controlling the first accessory power supply A, second accessory power supply B alternation, specific implementation is: realize by regulating the output voltage of the first accessory power supply A and the second accessory power supply B within the specific limits, regulate the output voltage of the first accessory power supply A higher than the output voltage of the second accessory power supply B, the first accessory power supply A is made to have power output in duty, and the second accessory power supply B is in holding state, regulate the output voltage of the second accessory power supply B higher than the output voltage of the first accessory power supply A, the second accessory power supply B is made to have power output in duty, and the first accessory power supply A is in holding state.
The Voltage loop reference value regulating the output voltage of the first accessory power supply A to be greater than the second accessory power supply B higher than the output voltage of the second accessory power supply B by the Voltage loop reference value that control module controls the first accessory power supply A realizes; The Voltage loop reference value regulating the output voltage of the second accessory power supply B to be less than the second accessory power supply B higher than the output voltage of the first accessory power supply A by the Voltage loop reference value that control module controls the first accessory power supply A realizes;
The present invention also provides a kind of redundancy secondary power system fault detection method, and the process flow diagram of fault detection method is see Fig. 2.The method comprises the following steps: step S1: at current operating cycle, detection control unit control system enters first mode A duty, described first mode A duty is that control first accessory power supply A is in mode of operation, the second accessory power supply B is in standby mode, enters step S2 after work a period of time; Step S2: gather N point first accessory power supply A cooling system temperature Ta1, Ta2 ... TaN and N point second accessory power supply B cooling system temperature Tb1, Tb2 ... TbN, and obtain mean value TA, TB respectively, its
,
; Step S3: judge whether TA-TB is more than or equal to temperature threshold
if then enter step S04, otherwise judge the first accessory power supply A fault, and alarm; Step S4: judge whether system is in first mode A duty, if then go to step S05, otherwise goes to step S02; Step S5: enter the next work period, detection control unit control system enters first mode B duty, described first mode A duty is that control first accessory power supply A is in standby mode, the second accessory power supply B is in mode of operation, enters step S6 after work a period of time; Step S6, gathers N point first accessory power supply A cooling system temperature Ta1, Ta2 ... TaN and N point second accessory power supply B cooling system temperature Tb1, Tb2 ... TbN, and obtain mean value TA, TB respectively, wherein
,
; Step S7, judges whether TB-TA is more than or equal to
if then enter step S08, otherwise judge the second accessory power supply B fault, and alarm; Step S8, judges whether system is in first mode B duty, if then go to step S1, otherwise goes to step S6.Wherein
for temperature difference threshold value, be a setting value, can adjust according to actual needs.
In step S1, detection control unit control system enters first mode A duty, described first mode A duty is that control first accessory power supply A is in mode of operation, the second accessory power supply B is in standby mode, and specific implementation is: regulate the output voltage of the first accessory power supply A to be the Voltage loop reference value that Voltage loop reference value that control module controls the first accessory power supply A is greater than the second accessory power supply B higher than the output voltage of the second accessory power supply B.
In step S5, detection control unit control system enters first mode B duty, described first mode A duty is that control first accessory power supply A is in standby mode, the second accessory power supply B is in mode of operation, and specific implementation is: regulate the output voltage of the second accessory power supply B to be the Voltage loop reference value that Voltage loop reference value that control module controls the first accessory power supply A is less than the one the second accessory power supply B higher than the output voltage of the first accessory power supply A.
Preferably detection control unit adopts MCU control chip or DSP control system.
Principle of work of the present invention is: form redundant power by the output-parallel of the first accessory power supply A and the second accessory power supply B and back up, first accessory power supply A, the second accessory power supply B alternation, when an accessory power supply breaks down (inactivity output), another accessory power supply is automatically for load provides power supply.When control system enters first mode A duty, described first mode A duty is that control first accessory power supply A is in mode of operation, the second accessory power supply B is in standby mode, work a period of time, if the first accessory power supply A normal (having power stage), the temperature of the first accessory power supply A slowly rises, and the temperature of the second accessory power supply B slowly declines, then TA-TB>=
; If the first accessory power supply A abnormal (inactivity output), no matter how system controls mode of operation, second accessory power supply B is still in running order is load supplying, then the temperature of the first accessory power supply A can not rise, and the temperature of the second accessory power supply B still maintains a higher temperature, TA-TB <
.When control system enters first mode B duty, described first mode B duty is that control second accessory power supply B is in mode of operation, the first accessory power supply A is in standby mode, work a period of time, if the second accessory power supply B normal (having power stage), the temperature of the second accessory power supply B slowly rises, and the temperature of the first accessory power supply A slowly declines, then TB-TA>=
; If the second accessory power supply B abnormal (inactivity output), no matter how system controls mode of operation, first accessory power supply A is still in running order is load supplying, then the temperature of the second accessory power supply B can not rise, and the temperature of the first accessory power supply A still maintains a higher temperature, TB-TA <
.
The judgement of prior art to accessory power supply fault needs extra circuit, and cost is higher, and the present invention judges by means of only simple temperature, i.e. identifiable design fault, and produces alarm, possesses that cost is low, the simple feature of method.
Those skilled in the art can make various amendment to this specific embodiment or supplement or adopt similar mode to substitute under the prerequisite without prejudice to principle of the present invention and essence, but these changes all fall into protection scope of the present invention.Therefore the technology of the present invention scope is not limited to above-described embodiment.
Claims (8)
1. a redundancy secondary power system failure detector, comprises the first accessory power supply, the second accessory power supply in parallel, it is characterized in that: also comprise the first temperature sampling unit, the second temperature sampling unit, detection control unit and an Alarm Unit,
The temperature signal obtained of sampling for gathering the cooling system temperature of the first accessory power supply, and is fed back to detection control unit by described first temperature sampling unit;
The temperature signal obtained of sampling for gathering the cooling system temperature of the second accessory power supply, and is fed back to detection control unit by described second temperature sampling unit;
Described Alarm Unit is used for the fault warning of the first accessory power supply or the second accessory power supply, and warning information is fed back to detection control unit;
Described detection control unit is for controlling the first accessory power supply, the second accessory power supply alternation, and judge the first accessory power supply according to the cooling system temperature of the first accessory power supply, the cooling system temperature of the second accessory power supply, whether the second accessory power supply break down, when described first accessory power supply or the second accessory power supply break down, send alarm signal to described Alarm Unit.
2. redundancy secondary power system failure detector according to claim 1, it is characterized in that: described detection control unit for controlling the first accessory power supply, the implementation of the second accessory power supply alternation is: regulate the output voltage of the first accessory power supply higher than the output voltage of the second accessory power supply, make the first accessory power supply have power output in duty, the second accessory power supply is in holding state; Regulate the output voltage of the second accessory power supply higher than the output voltage of the first accessory power supply, make the second accessory power supply have power output in duty, the first accessory power supply is in holding state.
3. redundancy secondary power system failure detector according to claim 2, is characterized in that: the Voltage loop reference value regulating the output voltage of the first accessory power supply to be greater than the second accessory power supply higher than the output voltage of the second accessory power supply by the Voltage loop reference value that described detection control unit controls the first accessory power supply realizes; The Voltage loop reference value regulating the output voltage of the second accessory power supply to be less than the second accessory power supply higher than the output voltage of the first accessory power supply by the Voltage loop reference value that described detection control unit controls the first accessory power supply realizes.
4., based on the fault detection method of redundancy secondary power system failure detector according to claim 1, it is characterized in that: comprise the following steps:
Step S1: at current operating cycle, detection control unit control system enters first mode duty, described first mode duty is that control first accessory power supply is in mode of operation, the second accessory power supply is in standby mode, enters step S2 after first mode duty work a period of time;
Step S2: gather N point first accessory power supply cooling system temperature Ta1, Ta2 ... TaN and N point second accessory power supply cooling system temperature Tb1, Tb2 ... TbN, and obtain mean value TA, TB respectively, wherein
,
, N is natural number;
Step S3: judge whether TA-TB is more than or equal to
if then enter step S4, otherwise judge the first accessory power supply fault, described detection control unit sends alarm signal to Alarm Unit, carries out fault warning by Alarm Unit,
for being greater than the temperature threshold of 0;
Step S4: judge whether system is in first mode duty, if then go to step S5, otherwise go to step S2;
Step S5: enter the next work period, detection control unit control system enters the second mode state, described second mode state is that control first accessory power supply is in standby mode, the second accessory power supply is in mode of operation, enters step S6 after second mode state work a period of time;
Step S6: gather N point first accessory power supply cooling system temperature Ta1, Ta2 ... TaN and N point second accessory power supply cooling system temperature Tb1, Tb2 ... TbN, and obtain mean value TA, TB respectively, wherein
,
, N is natural number;
Step S7: judge whether TB-TA is more than or equal to
if then enter step S8, otherwise judge the second accessory power supply fault, described detection control unit sends alarm signal to Alarm Unit, carries out fault warning by Alarm Unit;
for being greater than the temperature threshold of 0;
Step S8: judge whether system is in the second mode state, if then go to step S1, otherwise go to step S6.
5. redundancy secondary power system fault detection method according to claim 4, is characterized in that: the first mode of operation described in step S1 is realized by the output voltage of the adjustment first accessory power supply output voltage higher than the second accessory power supply; In step S5, the second work pattern is realized by the output voltage of the adjustment second accessory power supply output voltage higher than the first accessory power supply.
6. redundancy secondary power system fault detection method according to claim 4, is characterized in that: described first mode duty work a period of time is 3-10min.
7. redundancy secondary power system fault detection method according to claim 4, is characterized in that: second described mode state work a period of time is 3-10min.
8. redundancy secondary power system fault detection method according to claim 5, is characterized in that: the Voltage loop reference value regulating the output voltage of the first accessory power supply to be greater than the second accessory power supply higher than the output voltage of the second accessory power supply by the Voltage loop reference value that control module controls the first accessory power supply realizes;
The Voltage loop reference value regulating the output voltage of the second accessory power supply to be less than the one the second accessory power supplys higher than the output voltage of the first accessory power supply by the Voltage loop reference value that control module controls the first accessory power supply realizes.
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