WO2010126391A1 - Способ быстродействующего автоматического включения резервного электропитания потребителей (варианты) и устройство для его осуществления - Google Patents
Способ быстродействующего автоматического включения резервного электропитания потребителей (варианты) и устройство для его осуществления Download PDFInfo
- Publication number
- WO2010126391A1 WO2010126391A1 PCT/RU2009/000210 RU2009000210W WO2010126391A1 WO 2010126391 A1 WO2010126391 A1 WO 2010126391A1 RU 2009000210 W RU2009000210 W RU 2009000210W WO 2010126391 A1 WO2010126391 A1 WO 2010126391A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- main
- buses
- backup power
- power source
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Definitions
- the technical field The invention relates to electrical engineering, in particular to emergency control devices for electrical substations and distribution devices of low, medium and high voltage, and can be used to detect power failure of consumers of the main power source for any type of damage in the power supply network section of the switchgear and implementation high-speed switching to a backup power source.
- a known method of automatically turning on the backup power supply to consumers which consists in measuring the voltage of the direct sequence of buses of the main and backup power sources, the angle between the voltage vectors of the direct sequence of buses of the main sequence and backup power sources, determining the direction of active power at the input of the main power supply busbars, switching the main power supply bus to a backup power supply while reducing the voltage of the direct bus sequence the main source below a predetermined or exceeding the angle between the direct sequence voltage vectors is greater than the specified one and when the active power is directed from the buses to the main power source, the direction and value of the reactive component of the direct sequence current at the input of the main source buses, the voltage of the reverse sequence voltage of the main source buses and in direction the reactive component of the direct sequence current from the buses to the main source and exceeding the latter and the reverse sequence voltage of the main source busbars of the set values also switch the main source buses to the backup power source, and simultaneously, in all cases, the
- the disadvantages of this method include the impossibility of detecting single-phase, two-phase, and two-phase to ground short circuits in the consumer power circuit, due to the fact that in these modes the direction of the active power at the input of the substation does not change and its consumption by connected power consumers continues. For any short circuits in the power circuit, the direction of the reactive component of the direct sequence current does not change in the absence of motor load on the sections.
- the objective of the invention is the implementation of the ability to quickly respond to any disturbances in the normal power supply of consumers occurring in the circuit of their main power source and include all types of short circuits with subsequent switching of consumers to a backup power source.
- the method allows you to quickly respond to power outages on switchgears with and without electric motor load, as well as powered from unsynchronized power sources.
- the specified technical result according to option 1 is achieved by creating a method for automatically turning on the backup power supply of consumers, in which the voltage is measured direct sequence on the tires of the backup power source, instead of directing the active power at the input of the main power source for each of its three phases, measure the value of the effective current in the phase and the angle between the vector of the complex effective current in the same phase and the vector sum of the complex effective voltage between the other two phases on the tires of the main power source and taken equal to from 0 to 50% of the share of the same complex effective voltage on the tires of the backup power source, instead direct sequence voltages on the buses of the main power supply measure the linear voltages on the same buses and issue a command to switch the bus power of the main power supply to the standby when any of the measured voltages on the main power supply busbars drops below a specified value, when at the same time the value of the effective current in any of the phases at the input of the main power source and the angle between the vector of the complex effective current in the same phase and the vector sum of the complex effective voltage eniy
- the specified technical result according to option 2 is achieved by creating a method for automatically turning on the backup power supply to consumers, in which direct voltage is measured on the buses of the backup power source, the angle between the voltage vectors of the direct sequence of the buses of the main and backup power sources, instead active power at the input of the main power source for each of its three phases, the value of the effective current in phase and the angle between the vector of the complex effective current in the same phase and the vector sum of the complex effective voltage between the other two phases on the buses of the main power source and taken equal to 0 to 50% of the share of the same complex effective voltage on the tires of the backup power source and give a command to switch the bus power of the main source to the backup when increasing the angle between the voltage vectors of the direct sequence of buses of the main and backup power sources is higher than the specified value, when at the same time the value of the effective current in any of the phases at the input of the main power source and the value of the angle between the vector of the complex effective current in the same phase and the vector sum of the complex effective voltage between two other phases on
- the specified technical result according to option 3 is achieved by creating a method for automatically turning on the backup power supply of consumers, in which the direct sequence voltage is measured on the buses of the backup power source, instead of directing the active power at the input of the main power source for each of its three phases, the current value in phase and the value are measured the angle between the vector of the complex effective current in the same phase and the vector sum of the complex effective voltage between two other phases on tires the main power source and assumed equal to from 0 to 50% of the share of the same complex effective voltage on the tires of the backup power source, additionally measure the change in the angle between the voltage vectors of the direct sequence of the buses of the main and backup power supplies for a given period of time and give a command to switch the power supply of the buses of the main source on reserve when changing the angle between the voltage vectors of the direct sequence of buses of the main and backup power sources for a given industrial a lot of time is above a given value, when at the same time the value of the effective current in any phase at the input of the main power source and the angle between the vector
- the specified technical result is achieved by creating a device for automatically turning on the backup power supply of consumers, containing the main and backup power supplies, input switches of the main and backup power supplies, a section switch, buses of the main and backup power supplies, a set of measuring current transformers at the input of the main power supply, measuring kits voltage transformers on the tires of the main and backup power supplies, auto starter mathematical inclusion of the reserve, containing the recovery unit of the third phase current, equipped with three output channels, an analog-to-digital current converter, the input of which is connected to the output of the set of measuring current transformers through the third phase current recovery unit, equipped with three output channels, analog-to-digital voltage converters, the inputs of which are connected to the outputs of the sets of measuring voltage transformers on the main and backup buses power supplies, direct sequence voltage detection units on the buses of the main and backup power supplies, input the odes of which are connected to the output channels of analog-to-digital voltage converters on the buses of the main and backup power sources, respectively, the maximum voltage relay block, the input of which
- FIG. 1 shows a single-line circuit of a switchgear, including input and sectional switches, current and voltage measuring transformers, a block diagram of the operation of a microprocessor-based starter for quick automatic switching of a reserve, and an intermediate control device for circuit breakers.
- FIG. 2 illustrates the operation of the unit of a special relay body for phase control of the current direction on a complex plane.
- the invention is as follows.
- a device designed to implement this method of high-speed automatic inclusion of backup power supply to consumers contains the main 1 and backup 2 power sources; introduction switches of the main and reserve power supplies 3 and 4; section switch 5; main and backup power supply buses 6 and 7; set of measuring current transformers 8 at the input of the main source g power 1 (including two or three transformers); sets of measuring voltage transformers 9 and 10 on the buses of the main and backup power supplies 6 and 7 (including three transformers); microprocessor starting device for high-speed automatic inclusion of a reserve 11; a device 12 that switches to the backup 2 power source (closing the main contacts of the sectional switch 5) at a point in time close to the common-mode voltage between the same voltage on the buses of the main and backup power supplies 6 and 7, which is activated upon receipt of a fast turn-on command from the microprocessor starting device 11 reserve.
- the starting device for high-speed automatic inclusion of the reserve 11 contains a recovery unit for the third phase current 13 (necessary if there are only two transformers in the set of measuring current transformers 8); equipped with three output channels I al , I s , Li an analog-to-digital current converter 14, the input of which is connected to the output of the set of measuring current transformers 8 through the recovery unit of the third phase current 13; equipped with three output channels U ab u U c c y ca i and U a b 2 , U bc2 , U ca2 analog-to-digital voltage converters 15 and 16, the inputs of which are connected to the outputs of the sets of voltage measuring transformers on the buses of the main and backup power sources 9 and 10 respectively; direct sequence voltage detecting units 17 and 18 on the buses of the main and backup power supplies 6 and 7, the inputs of which are connected to the output channels of analog-to-digital voltage converters 15 (U ab b Ubc Ucai) and 16 (U ab2 , Ubc2,
- I a) is the vector corresponding to the complex effective current value I a i in phase "A" at the input of the main power source 1
- U bcl is the vector corresponding to the complex effective voltage value between the phases "B” and “C” on the buses of the main power supply 6
- k p U bc2 ⁇ the vector corresponding to the product of the complex effective value of the voltage U bc2 between the phases "B” and “C” on the buses of the backup power source 7 and the coefficient k p - specified in block 19 settings of the coefficient of recharge from the tires of the backup power source 7
- At bcl + k p U bc2 - the vector of the sum At bcl + k p U bc2 ; ⁇ yst - specified in the block
- the starting device controls the instantaneous values of the linear voltages on the buses of the main power supply 6 (u abb u bcb u ca i) and backup 7 (u ab2 , u bc2 , u ca2 ).
- the starting device controls the instantaneous values of phase currents at the input of the main power source 1 (i a b i b i, i c i or i a b i c j if there are only two measuring current transformers).
- the complex effective values of the voltages U abb U bc b U ca i and U ab2 , U bc2 , U ca2 are converted into complex direct current complex voltages Uy on the buses of the main source power supply 6 and U 2- ] on the tires of the backup power supply 7. Further operation of the microprocessor starting device is carried out due to the mathematical and logical processing of the measurement results.
- Prohibiting blocks for the operation of the device are blocks of special relay organs for phase-by-phase control of the current direction 19, 20, 21. If the conditions are met
- FIG. 2 An illustration of the operation of block 19 on a complex plane is shown in FIG. 2, the operation algorithm of blocks 20, 21 is similar with a corresponding change in input signals.
- the end of the vector I a i falls into the actuation zone, it is believed that the power flow in phase “A” is directed from the power source to the load, while at the output of a special relay body for phase-by-phase monitoring of the current direction 19, the signal becomes equal to logical “1”, at the output the end of the vector I a i from the response zone, the output signal of block 19 becomes equal to the logical "0".
- the starting device 11 When the power in each phase at the input of the main power source 1, the overflow of which is determined according to the above algorithm, is directed from the power source to the load, the starting device 11 does not work, whatever would happen in the power supply system.
- the signals at the input of block 26 block through blocks 27, 28, 29 the signal to turn off the input switch of the main power source 3 and turn on the section switch 5, the bus of the main and backup power sources 6 and 7 work separately.
- a minimum voltage relay block of three 22 is used, for registering the shutdown of the head switch at the power substation, the relay block 24 for determining the angle between the direct sequence voltage vectors on the buses of the main and backup power supplies 6 and 7 is used, relay block 25 determining the change in angle over a fixed time interval between the voltage vectors of the direct sequence on the primary and secondary buses power supplies 6 and 7.
- the maximum voltage relay unit 23 is used.
- the signals for the operation of the device are generated using the “I-HE” logic elements (block 26), “I” (blocks 27, 28, 29), “OR” (block 30) and enter the output unit 31, which controls the input switch of the main power source 3 and the sectional switch 5 through the device 12 for selecting the conditions (moment) for switching to the backup 2 power source that is activated upon receipt of micropro essornogo starting device 11 commands a high-speed switches.
- one or more blocks of special relay organs for phase-by-phase control of the current direction 19, 20, 21 switches (s) to its initial state and to its (s) output (-ax) the signal becomes logical “0”, the minimum voltage HIm (Iy 3131 I 5 Iy 1501 I 5 Iy 031 I) decreases below the setting of the relay block of the minimum voltage of three 22 U yst min and, if on the buses of the backup power supply 7 voltage
- the starting device 11 determining the angle between the direct sequence voltage vectors on the buses of the main and standby power supplies 6 and 7 and, if on the buses of the standby power supply 7, the voltage Iu 2-1 I is greater than the setting of the relay block of the maximum voltage 23 U max max , the starting device 11 sends signals to turning off the switch of the main power source 3 and to turn on the sectional switch 5 through the device 12.
- one or more blocks of special relay organs for phase-by-phase monitoring of the direction of current 19, 20, 21 switches (s) to the initial state and exits (-ax) (-ax ) the signal becomes equal to the logical "0"
- the value of the change in the angle ⁇ l2 between the direct sequence voltage vectors on the buses of the main power supply U 1-1 and the buses of the backup power supply U 2-1 for a fixed time interval ⁇ t yct equal to ⁇ 12 ⁇ l2 (2) - ⁇ l2 ⁇ 1)
- ⁇ 12 (l) , ⁇ 12 (2) are the values of the angle between the vectors direct voltage voltages on the buses of the main power supply U 14 and the buses of the backup power supply U 2 _, respectively, at the beginning and end of the time interval ⁇ t yst , satisfies the condition ⁇ 12 > ⁇ yst of the relay unit 25 for determining the change in angle over
- the application of the claimed method makes it possible to quickly respond to any disturbance in the normal power supply of consumers occurring in the circuit of their main power source and including all types of short circuits with subsequent switching of consumers to a backup power source, also allows you to quickly respond to power outages on switchgears with electromotive load and without it, as well as powered by unsynchronized power sources.
- the method of high-speed automatic switching on of the backup power supply of consumers and a device for its implementation can be used to detect violations of power supply to consumers of the main power source for any type of damage in the power supply network of the switchgear section and to quickly switch to the backup power source.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/318,203 US8680718B2 (en) | 2009-04-30 | 2009-04-30 | Method and device for the high-speed automatic activation of a backup consumer electrical power supply |
PCT/RU2009/000210 WO2010126391A1 (ru) | 2009-04-30 | 2009-04-30 | Способ быстродействующего автоматического включения резервного электропитания потребителей (варианты) и устройство для его осуществления |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/RU2009/000210 WO2010126391A1 (ru) | 2009-04-30 | 2009-04-30 | Способ быстродействующего автоматического включения резервного электропитания потребителей (варианты) и устройство для его осуществления |
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Publication Number | Publication Date |
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WO2010126391A1 true WO2010126391A1 (ru) | 2010-11-04 |
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PCT/RU2009/000210 WO2010126391A1 (ru) | 2009-04-30 | 2009-04-30 | Способ быстродействующего автоматического включения резервного электропитания потребителей (варианты) и устройство для его осуществления |
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US (1) | US8680718B2 (ru) |
WO (1) | WO2010126391A1 (ru) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1728927A1 (ru) * | 1990-06-27 | 1992-04-23 | Московский энергетический институт | Способ автоматического включени резерва |
GB2259199A (en) * | 1991-08-27 | 1993-03-03 | Seikosha Kk | Backup power supply apparatus with disconnect switch for use during shipping |
RU2030056C1 (ru) * | 1992-08-14 | 1995-02-27 | Всероссийский научно-исследовательский проектно-конструкторский и технологический институт релестроения | Способ автоматического включения резервного питания потребителей |
RU2326481C1 (ru) * | 2006-11-07 | 2008-06-10 | Государственное образовательное учреждение высшего профессионального образования "Московский энергетический институт (технический университет)" (ГОУВПО "МЭИ(ТУ)") | Способ автоматического включения резервного электропитания потребителей и устройство для его осуществления |
-
2009
- 2009-04-30 WO PCT/RU2009/000210 patent/WO2010126391A1/ru active Application Filing
- 2009-04-30 US US13/318,203 patent/US8680718B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1728927A1 (ru) * | 1990-06-27 | 1992-04-23 | Московский энергетический институт | Способ автоматического включени резерва |
GB2259199A (en) * | 1991-08-27 | 1993-03-03 | Seikosha Kk | Backup power supply apparatus with disconnect switch for use during shipping |
RU2030056C1 (ru) * | 1992-08-14 | 1995-02-27 | Всероссийский научно-исследовательский проектно-конструкторский и технологический институт релестроения | Способ автоматического включения резервного питания потребителей |
RU2326481C1 (ru) * | 2006-11-07 | 2008-06-10 | Государственное образовательное учреждение высшего профессионального образования "Московский энергетический институт (технический университет)" (ГОУВПО "МЭИ(ТУ)") | Способ автоматического включения резервного электропитания потребителей и устройство для его осуществления |
Also Published As
Publication number | Publication date |
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US20120169121A1 (en) | 2012-07-05 |
US8680718B2 (en) | 2014-03-25 |
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