CN102593861A - Intelligent comprehensive control method for distribution transformers - Google Patents
Intelligent comprehensive control method for distribution transformers Download PDFInfo
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- CN102593861A CN102593861A CN2012100178448A CN201210017844A CN102593861A CN 102593861 A CN102593861 A CN 102593861A CN 2012100178448 A CN2012100178448 A CN 2012100178448A CN 201210017844 A CN201210017844 A CN 201210017844A CN 102593861 A CN102593861 A CN 102593861A
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Abstract
The invention discloses an intelligent comprehensive control method for distribution transformers, belonging to the field of automatic control of electric systems. The intelligent comprehensive control method comprises the concrete steps of: automatically detecting rated capacities of the transformers by the systems; respectively detecting; when the rated capacity A of the transformer T1 is equal to, more than or less than B, calculating load values of the transformers in real time by distribution monitoring devices; and delaying for a time of delta t, if the condition is still met, determining the transformer which meets the rated capacity to supply power. Compared with the prior art, various running modes of the transformers can be realized according to the load situations, so that the losses of the transformers are reduced to the maximum extent, and the aim of economic running of the transformers is achieved; in addition, when the high-level power faults of the distribution transformers are caused or after the high-level power faults are removed, the intelligent comprehensive control method realizes an automatic power restoration function according to the actual running situation.
Description
Technical field
The present invention relates to a kind of distribution transformer intelligent comprehensive control method, relate in particular to a kind of 10kV distribution transformer economical operation intelligent comprehensive control method, belong to the electric power system automation field.
Background technology
Existing a large amount of power distribution room load variations is big, and operational mode is difficult to confirm, when level power supply breaks down on the distribution transformer, influences the power supply of low-voltage customer, or higher level's fault eliminate restore electricity after, low pressure can not automatic recovery of power supply etc. many reasons.No matter the domestic power distribution room that dual transformer is installed is at monotropic operation, paired running or fanout operation, all is manual control, can't realize the automatic and economical operation of transformer according to the variation of load.
Summary of the invention
The technical problem that the present invention will solve is: overcome the problem that prior art exists; To the requirement of electric administrative department to the raising transformer economic operation; Provide a kind of can intelligent surveillance and control dual transformer running status, guarantee the distribution transformer intelligent comprehensive control method of power supply reliability and economy.
The technical solution adopted for the present invention to solve the technical problems is: this kind distribution transformer intelligent comprehensive control method, and it is characterized in that: concrete steps are following:
Step 1: after the beginning, system detects the rated capacity A of transformer T1, T2, the size of B automatically;
Step 2: when the rated capacity of transformer T1, T2 equates to be A=B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity A of transformer T1, then delay time Δ t;
Step 3: behind the delay time Δ t,, then confirm to supply power by transformer T1 if also satisfy the condition of total actual motion apparent power the A '+B ' of transformer T1, T2 less than the rated capacity A of transformer T1;
Step 4: judge that whether step down side bus connection switch K5 is in a minute position;
Step 5: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 6: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 7: if step down side bus connection switch K5 is closing the position, the step down side K switch 4 of separating brake B side, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 8: if transformer T1, T2 be total actual motion apparent power A＜A '+B '＜during A+B, judge whether step down side bus connection switch K5 is closing the position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 9: when the rated capacity of transformer T1, T2 is unequal when being A＞B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity B of transformer T2, then delay time Δ t;
Step 10: behind the delay time Δ t,, then confirm to supply power by transformer T2 if also satisfy the condition of total actual motion apparent power the A '+B ' of transformer T1, T2 less than the rated capacity B of transformer T2;
Step 11: judge that whether step down side bus connection switch K5 is in a minute position;
Step 12: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 13: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 3 of separating brake A side again, the transformer high-voltage side K switch 1 of last separating brake A side;
Step 14: if transformer T1, T2 be total actual motion apparent power B＜A '+B '≤during A, whether judge step down side bus connection switch K5 in a minute position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 15: the step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 16: if transformer T1, T2 be total actual motion apparent power A＜A '+B '＜during A+B, whether judge step down side bus connection switch K5 in a minute position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 17: when the rated capacity of transformer T1, T2 is unequal when being A＜B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity A of transformer T1, then delay time Δ t;
Step 18: behind the delay time Δ t,, then confirm to supply power by transformer T1 if also satisfy the rated capacity A of total actual motion apparent power the A '+B ' of transformer T1, T2 less than transformer T1;
Step 19: judge that whether step down side bus connection switch K5 is in a minute position;
Step 20: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 21: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 22: if when transformer T1, the total actual motion apparent power of T2 satisfy A＜A '+B '≤B, whether judge step down side bus connection switch K5, if in minute position then the step down side bus connection switch K5 that closes a floodgate in a minute position;
Step 23: the step down side K switch 3 of separating brake A side again, the transformer high-voltage side K switch 1 of last separating brake A side;
Step 24: if when transformer T1, the total actual motion apparent power of T2 satisfy B＜A '+B '＜A+B, whether judge step down side bus connection switch K5 in a minute position, if in minute position the step down side bus connection switch K5 that closes a floodgate get final product.
Operation principle
, low-pressure side trips after detecting decompression; According to decompression trip signal enable logic relationship detection distribution transformer high side voltage, in the time of setting, if the high-pressure side restores electricity and low-pressure side has dropped into the reclosing function; Supervising device then starts the combined floodgate switch of low-pressure side, restores electricity.
When two transformer T1, T2 fanout operation; If transformer high-voltage side outage; Start this moment and female couplet of low pressure throw function fully, mother joins and is equipped with the condition of throwing is that the total load in combined floodgate low pressure female couplet back is lower than the rated load of charged side distribution transforming, otherwise can not throw the step down side bus connection switch fully.
When in monotropic operation; The distribution transformer high-pressure side dead electricity of on-load; And dropped in the distribution transformer of stand-by heat and thrown function fully; The high and low voltage switch of stand-by heat distribution transformer closes a floodgate and the combined floodgate order of step down side bus connection switch if the rated capacity of stand-by heat distribution transformer during greater than actual load numerical value, then starts, and realizes in the short time restoring electricity.
Two transformer T1, when T2 moves under non-failure condition; Supervising device calculates two transformer T1, T2 load and lossy data separately in real time, designs logic control according to the rated capacity of these data and transformer distribution transforming is operated under the most economical situation.
Compared with prior art, the invention has the beneficial effects as follows: this control method is designed in the supervising device, is installed to a sub-district and tries out; Through the trial run in 1 year, two transformer T1, T2 independent operating mode or operations were adopted, a warm standby mode in this sub-district before not transforming; Be again under the situation of little load particularly at two transformer T1, T2 fanout operation; Make power factor reach predetermined target value (0.95) through this control method, through transforming 1 year about 10,000 degree that can economize on electricity; Can reduce expenses surplus in the of 5000 yuan recoverable investment in 4 years.
When breaking down, automatic recovery of power supply in the short period of time, and need not the power supply personnel and go to the scene in person and carry out manual operation has really been realized reliable, safety, economical operation.
Description of drawings
Fig. 1: certain sub-district power distribution room dual transformer primary connection schematic diagram.
Fig. 2: distribution transformer intelligent comprehensive control method logical flow chart of the present invention.
Among Fig. 1: T1, T2 transformer; The rated capacity of A, transformer T1; The rated capacity of B, transformer T2; K1, K2 transformer high-voltage side switch; K3, K4 step down side switch; K5 step down side bus connection switch; VT1-VT2 high side voltage transducer; VT3-VT4 low-pressure side voltage sensor; CT1-CT2 high voltage side current transducer; CT3-CT4 low-pressure side current sensor; A ' is the actual motion apparent power of A side transformer T1; B ' is the actual motion apparent power of B side transformer T2.
Specific embodiment
Below in conjunction with accompanying drawing 1-2 distribution transformer intelligent comprehensive control method of the present invention is described further:
As shown in Figure 1:
Certain sub-district power distribution room is by transformer high-voltage side K switch 1, K2; Step down side K switch 3, K4; Step down side bus connection switch K5, transformer T1, T2, high side voltage transducer VT1-VT2; Low-pressure side voltage sensor VT3-VT4, high voltage side current transducer CT1-CT2 and low-pressure side current sensor CT3-CT4 form.
As shown in Figure 2:
Can adjust the operational mode of transformer automatically according to the actual conditions of scene load, be divided into single phase transformer operation, dual transformer fanout operation, dual transformer paired running.
Distribution transformer intelligent comprehensive control method of the present invention, concrete steps are following:
Step 1: after the beginning, system detects the rated capacity A of transformer T1, T2, the size of B automatically;
Step 2: when the rated capacity of transformer T1, T2 equates to be A=B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity A of transformer T1; Delay time Δ t (Δ t chronomere is minute that the concrete time is made by oneself by the user according to circumstances) then;
Step 3: behind the delay time Δ t,, then confirm to supply power by transformer T1 if also satisfy the condition of total actual motion apparent power the A '+B ' of transformer T1, T2 less than the rated capacity A of transformer T1;
Step 4: judge that whether step down side bus connection switch K5 is in a minute position;
Step 5: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 6: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 7: if step down side bus connection switch K5 is closing the position, the step down side K switch 4 of separating brake B side, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 8: if transformer T1, T2 be total actual motion apparent power A＜A '+B '＜during A+B, whether judge step down side bus connection switch K5 in a minute position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 9: when the rated capacity of transformer T1, T2 is unequal when being A＞B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity B of transformer T2, then delay time Δ t;
Step 10: behind the delay time Δ t,, then confirm to supply power by transformer T2 if also satisfy the condition of total actual motion apparent power the A '+B ' of transformer T1, T2 less than the rated capacity B of transformer T2;
Step 11: judge that whether step down side bus connection switch K5 is in a minute position;
Step 12: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 13: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 3 of separating brake A side again, the transformer high-voltage side K switch 1 of last separating brake A side;
Step 14: if transformer T1, T2 be total actual motion apparent power B＜A '+B '≤during A, whether judge step down side bus connection switch K5 in a minute position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 15: the step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 16: if transformer T1, T2 be total actual motion apparent power A＜A '+B '＜during A+B, whether judge step down side bus connection switch K5 in a minute position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 17: when the rated capacity of transformer T1, T2 is unequal when being A＜B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity A of transformer T1, then delay time Δ t;
Step 18: behind the delay time Δ t,, then confirm to supply power by transformer T1 if also satisfy the rated capacity A of total actual motion apparent power the A '+B ' of transformer T1, T2 less than transformer T1;
Step 19: judge that whether step down side bus connection switch K5 is in a minute position;
Step 20: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 21: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 22: if when transformer T1, the total actual motion apparent power of T2 satisfy A＜A '+B '≤B, whether judge step down side bus connection switch K5, if in minute position then the step down side bus connection switch K5 that closes a floodgate in a minute position;
Step 23: the step down side K switch 3 of separating brake A side again, the transformer high-voltage side K switch 1 of last separating brake A side;
Step 24: if when transformer T1, the total actual motion apparent power of T2 satisfy B＜A '+B '＜A+B, whether judge step down side bus connection switch K5 in a minute position, if in minute position the step down side bus connection switch K5 that closes a floodgate get final product.
This control method is designed in the supervising device; It is on probation to be installed to a sub-district; Low pressure through this supervising device overlaps function can shorten high-tension line because transient fault causes power failure, and the automatic power work of low-voltage customer when high pressure restores electricity after, is example calculating with the load of a 630kVA distribution transforming band 70%; Through being installed, this supervising device can on average do sth. in advance power supply in 40 minutes than leaning on the manual reversion power supply before this supervising device is not installed, and at every turn can about 300 kilowatt hours of many amount of power supply.
Low pressure prepared auto restart function through this supervising device can increase substantially because the low-voltage customer interruption duration that the 10kV fault causes.After being installed, this supervising device can on average not shift to an earlier date the power supply that recovered low-voltage customer in 1.5 hours before the installation than having.Load with a 630kVA distribution transforming band 58% is an example, at every turn can about 870 kilowatt hours of many amount of power supply.
Two transformer T1, T2 independent operating mode or operations are adopted in this sub-district before not transforming; A warm standby mode is again under the situation of little load at two transformer T1, T2 fanout operation particularly, makes power factor reach predetermined target value (0.95) through this control method; Through transforming; About 10,000 degree that can economize on electricity in 1 year can be reduced expenses surplus in the of 5000 yuan, recoverable investment in 4 years.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But everyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and remodeling that above embodiment did, still belong to the protection range of technical scheme of the present invention according to technical spirit of the present invention.
Claims (1)
1. distribution transformer intelligent comprehensive control method, it is characterized in that: concrete steps are following:
Step 1: after the beginning, system detects the rated capacity A of transformer T1, T2, the size of B automatically;
Step 2: when the rated capacity of transformer T1, T2 equates to be A=B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity A of transformer T1, then delay time Δ t;
Step 3: behind the delay time Δ t,, then confirm to supply power by transformer T1 if also satisfy the condition of total actual motion apparent power the A '+B ' of transformer T1, T2 less than the rated capacity A of transformer T1;
Step 4: judge that whether step down side bus connection switch K5 is in a minute position;
Step 5: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 6: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 7: if step down side bus connection switch K5 is closing the position, the step down side K switch 4 of separating brake B side, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 8: if transformer T1, T2 be total actual motion apparent power A＜A '+B '＜during A+B, whether judge step down side bus connection switch K5 in a minute position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 9: when the rated capacity of transformer T1, T2 is unequal when being A＞B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity B of transformer T2, then delay time Δ t;
Step 10: behind the delay time Δ t,, then confirm to supply power by transformer T2 if also satisfy the condition of total actual motion apparent power the A '+B ' of transformer T1, T2 less than the rated capacity B of transformer T2;
Step 11: judge that whether step down side bus connection switch K5 is in a minute position;
Step 12: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 13: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 3 of separating brake A side again, the transformer high-voltage side K switch 1 of last separating brake A side;
Step 14: if transformer T1, T2 be total actual motion apparent power B＜A '+B '≤during A, judge whether step down side bus connection switch K5 is closing the position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 15: the step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 16: if transformer T1, T2 be total actual motion apparent power A＜A '+B '＜during A+B, whether judge step down side bus connection switch K5 in a minute position, if in minute position then the step down side bus connection switch K5 that closes a floodgate;
Step 17: when the rated capacity of transformer T1, T2 is unequal when being A＜B; The distribution monitor device calculates the load size of each transformer in real time; If total actual motion apparent power the A '+B ' of transformer T1, T2 is less than the rated capacity A of transformer T1, then delay time Δ t;
Step 18: behind the delay time Δ t,, then confirm by supplying power by transformer T1 if also satisfy the rated capacity A of total actual motion apparent power the A '+B ' of transformer T1, T2 less than transformer T1;
Step 19: judge that whether step down side bus connection switch K5 is in a minute position;
Step 20: if the voltage difference that step down side bus connection switch K5, judges step down side bus connection switch K5 both sides in a minute position whether in the scope of setting and phase place whether identical;
Step 21: when in the scope that the voltage difference of step down side bus connection switch K5 both sides is being set and phase place when identical; Combined floodgate step down side bus connection switch K5; The step down side K switch 4 of separating brake B side again, the transformer high-voltage side K switch 2 of last separating brake B side;
Step 22: if when transformer T1, the total actual motion apparent power of T2 satisfy A＜A '+B '≤B, whether judge step down side bus connection switch K5, if in minute position then the step down side bus connection switch K5 that closes a floodgate in a minute position;
Step 23: the step down side K switch 3 of separating brake A side again, the transformer high-voltage side K switch 1 of last separating brake A side;
Step 24: if when transformer T1, the total actual motion apparent power of T2 satisfy B＜A '+B '＜A+B, whether judge step down side bus connection switch K5 in a minute position, if in minute position the step down side bus connection switch K5 that closes a floodgate get final product.
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| CN201210017844.8A CN102593861B (en) | 2012-01-19 | 2012-01-19 | Intelligent comprehensive control method for distribution transformers |
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| CN201210017844.8A CN102593861B (en) | 2012-01-19 | 2012-01-19 | Intelligent comprehensive control method for distribution transformers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441438A (en) * | 2013-08-20 | 2013-12-11 | 北京电研华源电力技术有限公司 | On-load capacitance regulating box-type transformer substation |
| CN107492947A (en) * | 2017-07-26 | 2017-12-19 | 国网山东省电力公司日照供电公司 | A kind of dual transformer control method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478177A (en) * | 2009-01-08 | 2009-07-08 | 杭州市电力局 | Safe automatic control method suitable for transforming plant main transformer tripping |
| CN201868896U (en) * | 2010-08-17 | 2011-06-15 | 重庆市电力公司城区供电局 | Economic operation system of transformer |
| CN102280886A (en) * | 2011-08-29 | 2011-12-14 | 重庆市机电设备总公司 | Distribution transformer economy operation criterion algorithm system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478177A (en) * | 2009-01-08 | 2009-07-08 | 杭州市电力局 | Safe automatic control method suitable for transforming plant main transformer tripping |
| CN201868896U (en) * | 2010-08-17 | 2011-06-15 | 重庆市电力公司城区供电局 | Economic operation system of transformer |
| CN102280886A (en) * | 2011-08-29 | 2011-12-14 | 重庆市机电设备总公司 | Distribution transformer economy operation criterion algorithm system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103441438A (en) * | 2013-08-20 | 2013-12-11 | 北京电研华源电力技术有限公司 | On-load capacitance regulating box-type transformer substation |
| CN107492947A (en) * | 2017-07-26 | 2017-12-19 | 国网山东省电力公司日照供电公司 | A kind of dual transformer control method and system |
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| CN102593861B (en) | 2014-06-11 |
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Owner name: SHAOXING POWER BUREAU Free format text: FORMER OWNER: SHANDONG KEHUI POWER AUTOMATION CO., LTD. Effective date: 20140227 Owner name: SHANDONG KEHUI POWER AUTOMATION CO., LTD. Free format text: FORMER OWNER: SHAOXING POWER BUREAU Effective date: 20140227 |
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Address after: 312000 Shaoxing Shengli Road, Zhejiang, No. 58 Applicant after: SHAOXING ELECTRIC POWER BUREAU Applicant after: SHANDONG KEHUI POWER AUTOMATION Co.,Ltd. Address before: 312000 Shaoxing Shengli Road, Zhejiang, No. 58 Applicant before: SHAOXING ELECTRIC POWER BUREAU Applicant before: SHANDONG KEHUI POWER AUTOMATION Co.,Ltd. |
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Effective date of registration: 20140227 Address after: 255087 Shandong Province, Zibo city Zhangdian District Road No. 16 win Department of science and Technology Park Applicant after: SHANDONG KEHUI POWER AUTOMATION Co.,Ltd. Applicant after: SHAOXING ELECTRIC POWER BUREAU Address before: 312000 Shaoxing Shengli Road, Zhejiang, No. 58 Applicant before: SHAOXING ELECTRIC POWER BUREAU Applicant before: SHANDONG KEHUI POWER AUTOMATION Co.,Ltd. |
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