CN113783283A - Cross-voltage-class spare power automatic switching implementation method - Google Patents
Cross-voltage-class spare power automatic switching implementation method Download PDFInfo
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Abstract
The invention relates to the technical field of power secondary equipment, and discloses a cross-voltage-class spare power automatic switching implementation method, which comprises a spare power automatic switching body, wherein a high-voltage side unit, a low-voltage side unit and an operation unit are arranged on the spare power automatic switching body; the high-voltage side unit comprises a high-voltage side switching value input module, a high-voltage side analog value input module and a high-voltage side switching value output module; the low-voltage side unit is provided with a low-voltage side switching value input module, a low-voltage side analog value input module and a low-voltage side switching value output module; eight spare power automatic switching modes are arranged in the operation unit, wherein the first mode to the fourth mode are operations of high-voltage side switching value and analog quantity information; the fifth to eighth modes are operations of low-voltage-side switching value and analog value information. Compared with the prior art, the invention integrates the spare power automatic switching devices with different voltage levels into one device, avoids the matching problem among different devices, reduces the investment, simplifies the wiring, is safe and reliable, and improves the operation, maintenance and overhaul efficiency of the equipment.
Description
Technical Field
The invention relates to the technical field of power secondary equipment, in particular to a method for realizing cross-voltage-level backup power automatic switching.
Background
The backup automatic switching device (backup power supply or device automatic switching device) is an inseparable part of the secondary equipment of the power system, and plays a very important role in ensuring the power supply reliability of the power system and the like. With the continuous expansion of the scale of the power grid and the increasing requirements of users on the power supply reliability, on one hand, the application of the backup power automatic switching in the system needs to be increased, on the other hand, the function of the backup power automatic switching needs to be continuously improved, the operational logic of the backup power automatic switching is simplified, and the action correctness and the reliability of the backup power automatic switching are improved.
At present, a plurality of spare power automatic switching devices are required to be configured for power grids of one transformer substation with different voltage grades, each spare power automatic switching device is connected to information data of the voltage grade to operate independently, a high-voltage side device and a low-voltage side device need to be matched according to different time, sometimes different factory device time timing modes are different, or manual setting time errors possibly cause the problem of action matching of the two spare power automatic switching devices with different voltage grades, so that power grid power loss accidents occur. In addition, according to the operation requirement, the locking is realized through an external locking contact when the locking is needed, and the wiring is complicated and is easy to make mistakes. Therefore, at present, for a transformer substation, a plurality of spare power automatic switching devices need to be configured, which is not economical, in order to reduce investment, the devices can be integrated into one device, and the matching between the devices can be realized inside, which is simple and reliable, and especially for the intelligent transformer substation based on the IEC61850 protocol at the present stage, the access of external switching value and analog value is more convenient through optical fiber access.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a method for realizing the cross-voltage level backup power automatic switching, which solves the problem that a plurality of backup power automatic switching devices need to be configured in the existing transformer substation, and designs the cross-voltage level backup power automatic switching, so that the possibility of configuring only one backup power automatic switching device for one transformer substation is provided, and the application prospect is wider particularly for the intelligent transformer substation.
The technical scheme is as follows: the invention provides a method for realizing cross-voltage-level backup power automatic switching, which comprises a backup power automatic switching body and is characterized in that a high-voltage side unit, a low-voltage side unit and an operation unit are arranged on the backup power automatic switching body;
the high-voltage side unit comprises a high-voltage side switching value input module, a high-voltage side analog value input module and a high-voltage side switching value output module;
the low-voltage side unit is provided with a low-voltage side switching value input module, a low-voltage side analog value input module and a low-voltage side switching value output module;
the high-voltage side switching value input module is connected with position information of 1DL, 2DL and 3DL of the high-voltage side circuit breakers, the high-voltage side analog value input module is connected with current and voltage information of a high-voltage side I section, a high-voltage side II section, a line L1 and lines L2, 1TA and 2TA, and the high-voltage side switching value output module outputs a plurality of paths of active contacts and passive contacts;
the low-voltage side switching value input module is accessed to the position information of the low-voltage side circuit breakers 4DL, 5DL and 6DL, the low-voltage side analog value input module is accessed to the current and voltage information of the low-voltage side I section, the low-voltage side II section, the high-voltage side I section, the high-voltage side II section, 4TA and 5TA, and the low-voltage side switching value output module outputs a plurality of paths of active contacts and passive contacts;
the operation unit is used for performing operation processing on switching value information and analog quantity information of the high-voltage side switching value input module, the high-voltage side analog quantity input module, the low-voltage side switching value input module and the low-voltage side analog quantity input module and then respectively outputting the switching value information and the analog quantity information to the high-voltage side switching value output module and the low-voltage side switching value output module.
Furthermore, eight spare power automatic switching modes are arranged in the operation unit, namely a mode one to a mode eight, wherein a mode one to a mode four are used for operation of high-voltage side switching value and analog value information; the fifth to eighth modes are operations of low-voltage-side switching value and analog value information.
Further, the first to fourth modes correspond to a primary wiring operation mode of the high voltage side, which respectively is as follows:
the first mode operation mode is that the breakers 1DL and 3DL are closed and 2DL is separated, the first mode operation mode of the spare power automatic switching mode is that the 1DL is changed from closed to separated, the 2DL is changed from separated to closed, the corresponding mode operation modes of the second mode operation mode are that the breakers 2DL and 3DL are closed and 1DL is separated, the second mode operation mode of the spare power automatic switching mode is that the 2DL is changed from closed to separated, and the 1DL is changed from separated to closed; the operation modes corresponding to the third mode and the fourth mode are circuit breakers 1DL and 2DL closed positions and 3DL separated positions, the three action modes of the spare power automatic switching mode are that 1DL is changed from closed positions to separated positions, 3DL is changed from separated positions to closed positions, and the four action modes of the spare power automatic switching mode are that 2DL is changed from closed positions to separated positions and 3DL is changed from separated positions to closed positions.
Further, the fifth to sixth modes correspond to a primary wiring operation mode of the low-voltage side, which respectively is as follows:
the operation modes corresponding to the fifth mode are circuit breakers 4DL and 6DL closing position and 5DL separating position, the five action modes of the spare power automatic switching mode are that 4DL is changed from closing position to separating position, 5DL is changed from separating position to closing position, the operation modes corresponding to the sixth mode are circuit breakers 5DL and 6DL closing position and 4DL separating position, and the six action modes of the spare power automatic switching mode are that 5DL is changed from closing position to separating position and 4DL is changed from separating position to closing position; the operation modes corresponding to the mode seven and the mode eight are closing positions of the circuit breakers 4DL and 5DL and separating positions of the circuit breakers 6DL, the seven action mode of the backup power automatic switching mode is that the closing position of the circuit breakers 4DL is changed into the separating position, the separating position of the circuit breakers 6DL is changed into the closing position, the eight action mode of the backup power automatic switching mode is that the closing position of the circuit breakers 5DL is changed into the separating position, and the separating position of the circuit breakers 6DL is changed into the closing position.
Further, the first to eighth modes include trip delay and closing delay, the trip delay is Tn1, and the closing delay is Tn2, where n =1,2, ·, 8.
Further, in the logical relationship between the third backup power automatic switching mode and the fifth backup power automatic switching mode, the delay time of T51 is greater than the sum of the delay times of T31 and T32, in the logical relationship between the third backup power automatic switching mode and the seventh backup power automatic switching mode, the delay time of T71 is greater than the sum of the delay times of T31 and T32, in the logical relationship between the fourth backup power automatic switching mode and the sixth backup power automatic switching mode, the delay time of T61 is greater than the sum of the delay times of T41 and T42, and in the logical relationship between the fourth backup power automatic switching mode and the eighth backup power automatic switching mode, the delay time of T81 is greater than the sum of the delay times of T41 and T42.
Further, the logic relationship of the spare power automatic switching mode one is as follows: after the first spare power automatic switching mode meets the action condition, the first spare power automatic switching mode is output to 1TJ through T11 to trip 1DL, and the first spare power automatic switching mode and the tripping position of 1DL form an AND gate and are output to 2HJ through T12 to close 2DL, and the first spare power automatic switching mode is locked after the first spare power automatic switching mode meets the action condition, so that once the first action condition of the first spare power automatic switching mode is met, the first spare power automatic switching mode is locked in five, six, seven and eight modes no matter whether the first mode is successful or not;
the second spare power automatic switching mode has the logic relationship as follows: and after the second spare power automatic switching mode meets the action condition, the second spare power automatic switching mode is output to 2TJ through T21 to trip the 2DL, and forms an AND gate with the jump position of the 2DL to output to 1HJ through T22 to close the 1DL, and the second spare power automatic switching mode is locked after the second spare power automatic switching mode meets the action condition, so that once the second spare power automatic switching mode meets the action condition of the second spare power automatic switching mode, the second spare power automatic switching mode is locked in five modes, six modes, seven modes and eight modes regardless of whether the second spare power automatic switching mode is successfully operated or not.
Further, the logic relationship of the spare power automatic switching mode three is as follows: when the third spare power automatic switching mode meets the action condition, the third spare power automatic switching mode is output to 1TJ through T31 to trip 1DL, and the third spare power automatic switching mode and the trip position of 1DL form an AND gate, and the third spare power automatic switching mode is output to 3HJ through T32 to close 3DL, and the output of T32 and the trip position of 3DL form an AND gate to lock the fifth, sixth, seventh and eighth spare power automatic switching modes;
the logic relation of the spare power automatic switching mode four is as follows: and after the fourth backup automatic switching mode meets the action condition, the fourth backup automatic switching mode is output to 2TJ through T41 to trip 2DL, and the fourth backup automatic switching mode and the jump bit of the 2DL form an AND gate, and the fourth backup automatic switching mode is output to 3HJ through T42 to close the 3DL, and the T42 output and the 3DL are combined to form an AND gate to lock the fifth backup automatic switching mode, the sixth backup automatic switching mode, the seventh backup automatic switching mode and the eighth backup automatic switching mode, and if the fourth backup automatic switching mode does not act or does not act successfully, the fifth backup automatic switching mode, the sixth backup automatic switching mode, the seventh automatic switching mode and the eighth backup automatic switching mode are not locked.
Further, the logic relationship of the spare power automatic switching mode five is as follows: after the fifth spare power automatic switching mode meets the action condition, the fifth spare power automatic switching mode is output to 4TJ through T51 to trip 4DL, and the fifth spare power automatic switching mode and the 4DL trip position form an AND gate and are output to 5HJ through T52 to close 5 DL;
the logic relation of the spare power automatic switching mode six is as follows: when the sixth spare power automatic switching mode meets the action condition, the sixth spare power automatic switching mode is output to 5TJ through T61 to trip 5DL, and the sixth spare power automatic switching mode and the jump position of 5DL form an AND gate and are output to 4HJ through T62 to close 4 DL;
the logic relation of the spare power automatic switching mode is as follows: after the spare power automatic switching mode seven meets the action condition, the spare power automatic switching mode seven is output to 4TJ through T71 to trip 4DL, and the spare power automatic switching mode seven and the tripping position of 4DL form an AND gate and are output to 6HJ through T72 to close 6 DL;
the logic relation of the spare power automatic switching mode eight is as follows: when the backup power automatic switching mode eight meets the operation condition, the backup power automatic switching mode eight outputs the tripping signal to 5TJ through T81 to trip 5DL, and forms an AND gate together with the tripping position of 5DL to output the tripping signal to 6HJ through T82 to close 6 DL.
Has the advantages that:
1. according to the invention, a plurality of spare power automatic switching devices with different voltage levels in a transformer substation are integrated into one device, so that the input cost of power equipment is reduced, the wiring of the device is simplified, and the operation, maintenance and overhaul efficiency of the device in the later period is improved.
2. The invention can be applied to conventional substations and intelligent substations, and has more obvious application value and application effect when being applied to intelligent substations.
Drawings
Fig. 1 is a schematic diagram of a first connection of the access backup power automatic switching device according to the present invention;
fig. 2 is a schematic diagram of a unit module of the automatic backup power switching device;
fig. 3 is a logic block diagram of locking of the backup automatic switching device.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention relates to a voltage-class-crossing backup power automatic switching implementation method which comprises a backup power automatic switching body, wherein a high-voltage side unit, a low-voltage side unit and an operation unit are arranged on the backup power automatic switching body.
The high-voltage side unit on the spare power automatic switching device body is provided with a high-voltage side switching value input module, a high-voltage side analog value input module and a high-voltage side switching value output module. The low-voltage side unit on the spare power automatic switching device body is provided with a low-voltage side switching value input module, a low-voltage side analog value input module and a low-voltage side switching value output module.
The operation unit on the spare power automatic switching device body is used for carrying out operation processing on switching value information and analog quantity information of the high-voltage side switching value input module, the high-voltage side analog quantity input module, the low-voltage side switching value input module and the low-voltage side analog quantity input module and then respectively outputting the switching value information and the analog quantity information to the high-voltage side switching value output module and the low-voltage side switching value output module.
Referring to fig. 1, a high-side switching value input module of a high-side unit is connected to position information of high-side circuit breakers 1DL, 2DL and 3DL, a high-side analog value input module is connected to current and voltage information of a high-side section I, a high-side section II, a line L1 and lines L2, 1TA and 2TA, and a high-side switching value output module outputs multiple paths of active contacts and passive contacts.
The low-voltage side switching value input module of the low-voltage side unit is connected with the position information of the low-voltage side circuit breakers 4DL, 5DL and 6DL, the low-voltage side analog value input module is connected with the current and voltage information of the low-voltage side I section, the low-voltage side II section, the high-voltage side I section, the high-voltage side II section, 4TA and 5TA, and the low-voltage side switching value output module outputs a plurality of paths of active contacts and passive contacts.
Eight spare power automatic switching modes are arranged in the operation unit, namely a mode I to a mode eight, wherein the mode I to the mode IV are used for operating high-voltage side switching value and analog quantity information, and the mode V to the mode eight are used for operating low-voltage side switching value and analog quantity information. The first mode to the fourth mode of the operation unit respectively correspond to four primary wiring operation modes of a high-voltage side, and the fifth mode to the eighth mode respectively correspond to four primary wiring operation modes of a low-voltage side. The first operation mode is that the breakers 1DL and 3DL are closed and the breakers 2DL are separated, the first operation mode of the spare power automatic switching mode is that the 1DL is changed from closed to separated and the 2DL is changed from separated to closed, the corresponding operation modes of the second mode are that the breakers 2DL and 3DL are closed and the 1DL is separated, the second operation mode of the spare power automatic switching mode is that the 2DL is changed from closed to separated and the 1DL is changed from separated to closed; the operation modes corresponding to the third mode and the fourth mode are circuit breakers 1DL and 2DL closed positions and 3DL separated positions, the three action modes of the spare power automatic switching mode are that 1DL is changed from closed positions to separated positions, 3DL is changed from separated positions to closed positions, the four action modes of the spare power automatic switching mode are that 2DL is changed from closed positions to separated positions, and 3DL is changed from separated positions to closed positions.
The operation modes corresponding to the fifth mode are circuit breakers 4DL and 6DL closing position and 5DL separating position, the operation mode corresponding to the sixth mode is circuit breakers 5DL and 6DL closing position and 4DL separating position, the operation mode corresponding to the fifth mode is circuit breakers 4DL and 6DL closing position and 5DL separating position, and the operation mode corresponding to the sixth mode is circuit breakers 5DL and 6DL closing position and 4DL separating position, the operation mode corresponding to the sixth mode is circuit breakers 5DL and 6DL opening position and 4DL separating position, and the operation mode corresponding to the sixth mode is circuit breakers 5DL and 6DL opening position and 4DL opening position and closing position; the operation modes corresponding to the mode seven and the mode eight are closing positions of the circuit breakers 4DL and 5DL and separating positions of the circuit breakers 6DL, the seven action mode of the backup power automatic switching mode is that the closing position of the circuit breaker 4DL is changed into the separating position, the separating position of the circuit breaker 6DL is changed into the closing position, the eight action mode of the backup power automatic switching mode is that the closing position of the circuit breaker 5DL is changed into the separating position, and the separating position of the circuit breaker 6DL is changed into the closing position.
The first to eighth modes all include trip delays and closing delays, the trip delays are respectively Tn1, and the closing delays are respectively Tn2, where n =1,2, ·, 8.
Referring to fig. 3, the present invention discloses a logic relationship for the 8 backup power automatic switching modes, and the specific logic relationship is as follows:
the logic relation of the spare power automatic switching mode one is as follows:
and after the first mode meets the action condition, the first mode is output to 1TJ through T11 to trip 1DL, and on the other hand, the first mode and the jump position of 1DL form an AND gate which is output to 2HJ through T12 to close 2DL, and on the other hand, the first mode meets the action condition, then the fifth, sixth, seventh and eighth modes of the automatic backup power switching mode are locked, so that once the first mode meets the action condition of the automatic backup power switching mode, the fifth, sixth, seventh and eighth modes are ensured to be locked no matter whether the first mode is successful or not. The method comprises the following specific steps:
the operation is performed as an example in a spare power automatic switching mode I and a spare power automatic switching mode seven: in the device, the first mode and the seventh mode are charged, the 1DL, the 3DL, the 4DL and the 5DL are closed, the 2DL and the 6DL are separated, when the circuit L1 has a fault, the spare power automatic switching device meets the action condition, the circuit breaker 1DL is tripped through the delay T11, and the circuit breaker 2DL is closed through the delay T12 after the 1DL tripping position is obtained. And immediately discharging the mode seven and locking the mode seven after meeting the action condition of the spare power automatic switching mode one (at the moment, if the mode one action is successful, the spare power automatic switching mode seven action is not needed, and if the mode one action is unsuccessful, all the high-voltage side is powered off, and the spare power automatic switching mode seven action is not needed).
The logic relationship of the spare power automatic switching mode II is as follows:
and after the second spare power automatic switching mode meets the action condition, the second spare power automatic switching mode is output to 2TJ through T21 to trip the 2DL, and forms an AND gate with the jump position of the 2DL to output to 1HJ through T22 to close the 1DL, and after the second spare power automatic switching mode meets the action condition, the fifth spare power automatic switching mode, the sixth spare power automatic switching mode, the seventh spare power automatic switching mode and the eighth spare power automatic switching mode are locked, so that the fifth spare power automatic switching mode, the sixth spare power automatic switching mode, the seventh spare power automatic switching mode and the eighth spare power automatic switching mode are ensured to be locked no matter whether the second spare power automatic switching mode is successfully operated or not. The method comprises the following specific steps:
the operation is exemplified by a spare power automatic switching mode II and a mode eight: in the device, the second mode and the eighth mode are charged, 2DL, 3DL, 4DL and 5DL are closed, 1DL and 6DL are separated, when a circuit L2 breaks down, the spare power automatic switching device meets the action condition, the circuit breaker 2DL is tripped through a delay T21, and the circuit breaker 1DL is closed through a delay T22 after the 2DL tripping position is obtained. And immediately discharging the mode eight and locking the mode eight after the condition of the action of the spare power automatic switching mode two is met (at the moment, if the mode two action is successful, the action of the spare power automatic switching mode eight is not needed, and if the mode two action is unsuccessful, all the high-voltage side is powered off, and the action of the spare power automatic switching mode eight is also not needed).
The logic relation of the spare power automatic switching mode III is as follows:
and after the third spare power automatic switching mode meets the action condition, the third spare power automatic switching mode is output to 1TJ through T31 to trip 1DL, and the third spare power automatic switching mode and the jump position of 1DL form an AND gate, and the third spare power automatic switching mode is output to 3HJ through T32 to close 3DL, and the output of T32 and the jump position of 3DL form an AND gate to lock the fifth, sixth, seventh and eighth spare power automatic switching modes, so that the fifth, sixth, seventh and eighth spare power automatic switching modes are not operated after the third spare power automatic switching mode is ensured to be operated, and the fifth, sixth, seventh and eighth spare power automatic switching modes are not locked if the third spare power automatic switching mode is not operated or the operation is unsuccessful. The method comprises the following specific steps:
the operation is performed as an example in a spare power automatic switching mode three and a spare power automatic switching mode seven: the third and seventh modes in the device are charged completely, as can be seen from fig. 1 and 3, when a fault occurs in the line L1, the spare power automatic switching device meets the action condition, trips the line breaker 1DL through a delay T31 after the 1DL is tripped and then closes the bridge breaker 3DL through a delay T32, and discharges electricity to the seventh mode immediately after the 3DL is tripped, thereby locking the seventh mode (at this time, the main transformer No. 1 recovers power supply through the 3DL without the seventh action of the spare power automatic switching mode).
If the action fails in the action process of the spare power automatic switching mode three, if the 3DL is not closed, the locking mode seven cannot be performed, the mode seven still can operate, the breaker 4DL is tripped through the delay T71, the breaker 6DL is closed through the delay T72 after the 4DL tripping position is obtained, and the reliable power supply of the low-voltage side I-section load is ensured. In the logic relationship between the third spare power automatic switching mode and the seventh spare power automatic switching mode, the delay time of T71 is greater than the sum of the delay times of T31 and T32.
The logic relationship of the spare power automatic switching mode four is as follows:
and after the fourth backup automatic switching mode meets the action condition, the fourth backup automatic switching mode is output to 2TJ through T41 to trip 2DL, and on the other hand, the fourth backup automatic switching mode and the skip position of 2DL form an AND gate, and the fourth backup automatic switching mode is output to 3HJ through T42 to close 3DL, and on the other hand, the output of T42 and the merge position of 3DL form an AND gate to lock the fifth backup automatic switching mode, the sixth backup automatic switching mode, the seventh backup automatic switching mode and the eighth backup automatic switching mode, after the fourth backup automatic switching mode is ensured to be operated, the fifth backup automatic switching mode, the sixth backup automatic switching mode, the seventh automatic switching mode and the eighth backup automatic switching mode are not operated, and if the fourth backup automatic switching mode is not operated or the operation is unsuccessful, the fifth backup automatic switching mode, the sixth automatic switching mode, the seventh automatic switching mode and the eighth backup automatic switching mode are not locked.
The operation is exemplified in a spare power automatic switching mode four and a spare power automatic switching mode eight: the method four and the method eight in the device are charged, the 1DL, the 2DL, the 4DL and the 5DL are closed, the 3DL and the 6DL are separated, when the circuit L2 has a fault, the spare power automatic switching device meets the action condition, the circuit breaker 2DL is tripped through the delay T41, after the 2DL tripping position is taken, the bridge breaker 3DL is closed through the delay T42, and simultaneously, the method eight is discharged immediately after the 3DL is closed, and the locking method eight is realized (at the moment, the power supply of the No. 2 main transformer is recovered through the 3DL, and the eight actions of the spare power automatic switching method are not needed).
If the action fails in the action process of the spare power automatic switching mode four, if the 3DL is not closed, the locking mode eight is avoided, the mode eight can still act, the breaker 5DL is tripped through the delay T81, the breaker 6DL is closed through the delay T82 after the 5DL tripping position is obtained, and the reliable power supply of the low-voltage side II-section load is ensured. In the logic relationship between the fourth spare power automatic switching mode and the eighth spare power automatic switching mode, the delay of T81 is greater than the sum of the delays of T41 and T42.
The five logical relations of the spare power automatic switching mode are as follows:
when the standby power automatic switching mode five meets the operation condition, under the condition of no locking signal, the standby power automatic switching mode five outputs the voltage to 4TJ through T51 to trip 4DL, and on the other hand, the voltage and the tripping position of 4DL form an AND gate and outputs the voltage and the tripping position of 4DL to 5HJ through T52 to close 5 DL. The low-voltage side I, II is loaded by the No. 2 main transformer.
The six logical relations of the spare power automatic switching mode are as follows:
when the standby power automatic switching mode six meets the operation condition, under the condition of no locking signal, the standby power automatic switching mode six is output to 5TJ through T61 to trip 5DL, and on the other hand, the standby power automatic switching mode six and the tripping position of 5DL form an AND gate and are output to 4HJ through T62 to close 4 DL. The low-voltage side I, II is loaded by the No. 1 main transformer.
The seven logical relations of the spare power automatic switching mode are as follows:
when the standby power automatic switching mode seven meets the operation condition, under the condition of no locking signal, the standby power automatic switching mode seven is output to 4TJ through T71 to trip 4DL, and on the other hand, the standby power automatic switching mode seven forms an AND gate with the trip position of 4DL to output to 6HJ through T72 to close 6 DL. The low-voltage side I, II is loaded by the No. 2 main transformer.
The eight logical relations of the spare power automatic switching mode are as follows:
when the backup power automatic switching mode eight meets the operation condition, under the condition of no locking signal, the backup power automatic switching mode eight outputs the backup power automatic switching mode eight to 5TJ through T81 to trip 5DL, and the backup power automatic switching mode eight and the 5DL form an AND gate, and outputs the AND gate to 6HJ through T82 to close 6 DL. The low-voltage side I, II is loaded by the No. 1 main transformer.
For the above logic relationship, the delay time of T51 in the logic relationship between the third and fifth backup power automatic switching modes is greater than the sum of the delay times of T31 and T32, the delay time of T71 in the logic relationship between the third and seventh backup power automatic switching modes is greater than the sum of the delay times of T31 and T32, the delay time of T61 in the logic relationship between the fourth and sixth backup power automatic switching modes is greater than the sum of the delay times of T41 and T42, and the delay time of T81 in the logic relationship between the fourth and eighth backup power automatic switching modes is greater than the sum of the delay times of T41 and T42.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. A voltage-class-crossing backup power automatic switching realization method comprises a backup power automatic switching body and is characterized in that a high-voltage side unit, a low-voltage side unit and an operation unit are arranged on the backup power automatic switching body;
the high-voltage side unit comprises a high-voltage side switching value input module, a high-voltage side analog value input module and a high-voltage side switching value output module;
the low-voltage side unit is provided with a low-voltage side switching value input module, a low-voltage side analog value input module and a low-voltage side switching value output module;
the high-voltage side switching value input module is connected with position information of 1DL, 2DL and 3DL of the high-voltage side circuit breakers, the high-voltage side analog value input module is connected with current and voltage information of a high-voltage side I section, a high-voltage side II section, a line L1 and lines L2, 1TA and 2TA, and the high-voltage side switching value output module outputs a plurality of paths of active contacts and passive contacts;
the low-voltage side switching value input module is accessed to the position information of the low-voltage side circuit breakers 4DL, 5DL and 6DL, the low-voltage side analog value input module is accessed to the current and voltage information of the low-voltage side I section, the low-voltage side II section, the high-voltage side I section, the high-voltage side II section, 4TA and 5TA, and the low-voltage side switching value output module outputs a plurality of paths of active contacts and passive contacts;
the operation unit is used for performing operation processing on switching value information and analog quantity information of the high-voltage side switching value input module, the high-voltage side analog quantity input module, the low-voltage side switching value input module and the low-voltage side analog quantity input module and then respectively outputting the switching value information and the analog quantity information to the high-voltage side switching value output module and the low-voltage side switching value output module.
2. The method for realizing the cross-voltage level backup power automatic switching according to claim 1, wherein eight backup power automatic switching modes are set in the operation unit, wherein the modes are a mode one to a mode eight, and the mode one to the mode four are operations of high-voltage side switching value and analog value information; the fifth to eighth modes are operations of low-voltage-side switching value and analog value information.
3. The method for realizing the backup power automatic switching across the voltage class according to claim 2, wherein the first to fourth modes correspond to a primary wiring operation mode of a high-voltage side, which respectively comprises:
the first mode operation mode is that the breakers 1DL and 3DL are closed and 2DL is separated, the first mode operation mode of the spare power automatic switching mode is that the 1DL is changed from closed to separated, the 2DL is changed from separated to closed, the corresponding mode operation modes of the second mode operation mode are that the breakers 2DL and 3DL are closed and 1DL is separated, the second mode operation mode of the spare power automatic switching mode is that the 2DL is changed from closed to separated, and the 1DL is changed from separated to closed; the operation modes corresponding to the third mode and the fourth mode are circuit breakers 1DL and 2DL closed positions and 3DL separated positions, the three action modes of the spare power automatic switching mode are that 1DL is changed from closed positions to separated positions, 3DL is changed from separated positions to closed positions, and the four action modes of the spare power automatic switching mode are that 2DL is changed from closed positions to separated positions and 3DL is changed from separated positions to closed positions.
4. The method for realizing the backup power automatic switching across the voltage class according to claim 2, wherein the fifth to sixth modes correspond to a primary wiring operation mode of a low-voltage side, which respectively are as follows:
the operation modes corresponding to the fifth mode are circuit breakers 4DL and 6DL closing position and 5DL separating position, the five action modes of the spare power automatic switching mode are that 4DL is changed from closing position to separating position, 5DL is changed from separating position to closing position, the operation modes corresponding to the sixth mode are circuit breakers 5DL and 6DL closing position and 4DL separating position, and the six action modes of the spare power automatic switching mode are that 5DL is changed from closing position to separating position and 4DL is changed from separating position to closing position; the operation modes corresponding to the mode seven and the mode eight are closing positions of the circuit breakers 4DL and 5DL and separating positions of the circuit breakers 6DL, the seven action mode of the backup power automatic switching mode is that the closing position of the circuit breakers 4DL is changed into the separating position, the separating position of the circuit breakers 6DL is changed into the closing position, the eight action mode of the backup power automatic switching mode is that the closing position of the circuit breakers 5DL is changed into the separating position, and the separating position of the circuit breakers 6DL is changed into the closing position.
5. The method for realizing backup power automatic switching across the voltage class according to claim 2, wherein the modes one to eight include a trip delay and a close delay, the trip delay is Tn1, and the close delay is Tn2, respectively, where n =1,2, 8.
6. The backup power automatic switching implementation method according to claim 5, wherein the delay time of T51 in the logical relationship between the third and fifth backup power automatic switching modes is greater than the sum of the delay times of T31 and T32, the delay time of T71 in the logical relationship between the third and seventh backup power automatic switching modes is greater than the sum of the delay times of T31 and T32, the delay time of T61 in the logical relationship between the fourth and sixth backup power automatic switching modes is greater than the sum of the delay times of T41 and T42, and the delay time of T81 in the logical relationship between the fourth and eighth backup power automatic switching modes is greater than the sum of the delay times of T41 and T42.
7. The method for realizing the backup power automatic switching across the voltage class according to claim 5, wherein a logic relation of the first backup power automatic switching mode is as follows: after the first spare power automatic switching mode meets the action condition, the first spare power automatic switching mode is output to 1TJ through T11 to trip 1DL, and the first spare power automatic switching mode and the tripping position of 1DL form an AND gate and are output to 2HJ through T12 to close 2DL, and the first spare power automatic switching mode is locked after the first spare power automatic switching mode meets the action condition, so that once the first action condition of the first spare power automatic switching mode is met, the first spare power automatic switching mode is locked in five, six, seven and eight modes no matter whether the first mode is successful or not;
the second spare power automatic switching mode has the logic relationship as follows: and after the second spare power automatic switching mode meets the action condition, the second spare power automatic switching mode is output to 2TJ through T21 to trip the 2DL, and forms an AND gate with the jump position of the 2DL to output to 1HJ through T22 to close the 1DL, and the second spare power automatic switching mode is locked after the second spare power automatic switching mode meets the action condition, so that once the second spare power automatic switching mode meets the action condition of the second spare power automatic switching mode, the second spare power automatic switching mode is locked in five modes, six modes, seven modes and eight modes regardless of whether the second spare power automatic switching mode is successfully operated or not.
8. The method for realizing the backup power automatic switching across the voltage class according to claim 5, wherein a logic relation of the backup power automatic switching mode three is as follows: when the third spare power automatic switching mode meets the action condition, the third spare power automatic switching mode is output to 1TJ through T31 to trip 1DL, and the third spare power automatic switching mode and the trip position of 1DL form an AND gate, and the third spare power automatic switching mode is output to 3HJ through T32 to close 3DL, and the output of T32 and the trip position of 3DL form an AND gate to lock the fifth, sixth, seventh and eighth spare power automatic switching modes;
the logic relation of the spare power automatic switching mode four is as follows: and after the fourth backup automatic switching mode meets the action condition, the fourth backup automatic switching mode is output to 2TJ through T41 to trip 2DL, and the fourth backup automatic switching mode and the jump bit of the 2DL form an AND gate, and the fourth backup automatic switching mode is output to 3HJ through T42 to close the 3DL, and the T42 output and the 3DL are combined to form an AND gate to lock the fifth backup automatic switching mode, the sixth backup automatic switching mode, the seventh backup automatic switching mode and the eighth backup automatic switching mode, and if the fourth backup automatic switching mode does not act or does not act successfully, the fifth backup automatic switching mode, the sixth backup automatic switching mode, the seventh automatic switching mode and the eighth backup automatic switching mode are not locked.
9. The method for realizing backup power automatic switching across voltage classes according to any one of claims 5 to 8, characterized in that the logic relationship of the backup power automatic switching mode five is as follows: after the fifth spare power automatic switching mode meets the action condition, the fifth spare power automatic switching mode is output to 4TJ through T51 to trip 4DL, and the fifth spare power automatic switching mode and the 4DL trip position form an AND gate and are output to 5HJ through T52 to close 5 DL;
the logic relation of the spare power automatic switching mode six is as follows: when the sixth spare power automatic switching mode meets the action condition, the sixth spare power automatic switching mode is output to 5TJ through T61 to trip 5DL, and the sixth spare power automatic switching mode and the jump position of 5DL form an AND gate and are output to 4HJ through T62 to close 4 DL;
the logic relation of the spare power automatic switching mode is as follows: after the spare power automatic switching mode seven meets the action condition, the spare power automatic switching mode seven is output to 4TJ through T71 to trip 4DL, and the spare power automatic switching mode seven and the tripping position of 4DL form an AND gate and are output to 6HJ through T72 to close 6 DL;
the logic relation of the spare power automatic switching mode eight is as follows: when the backup power automatic switching mode eight meets the operation condition, the backup power automatic switching mode eight outputs the tripping signal to 5TJ through T81 to trip 5DL, and forms an AND gate together with the tripping position of 5DL to output the tripping signal to 6HJ through T82 to close 6 DL.
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