CN110611306B - Backup power automatic switching locking method for 110kV transformer substation line - Google Patents
Backup power automatic switching locking method for 110kV transformer substation line Download PDFInfo
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- CN110611306B CN110611306B CN201910607468.XA CN201910607468A CN110611306B CN 110611306 B CN110611306 B CN 110611306B CN 201910607468 A CN201910607468 A CN 201910607468A CN 110611306 B CN110611306 B CN 110611306B
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Abstract
The invention relates to the technical field of power transformation secondary equipment maintenance, in particular to a 110kV substation line spare power automatic switching locking method, which comprises the following steps: judging whether the position of the bus side isolating switch on the line is divided or not through a standby power automatic switching device switching-in signal, judging whether the position of the line side isolating switch on the line is divided or not, judging whether the maintenance pressing plate on the line is switched in or not, and when the positions of the bus side isolating switch and the line side isolating switch are divided and the state of the maintenance pressing plate is switched in, exiting the standby power automatic switching function of the current line protection and reserving the standby power automatic switching functions of other running lines; and in other cases, the spare power automatic switching function of the related line is locked according to the original spare power automatic switching logic. The invention improves the internal logic program of the original spare power automatic switching device, controls the action process of the spare power automatic switching according to the states of the detected bus side disconnecting switch, the detected line side disconnecting switch and the detected maintenance pressing plate, avoids the risk of voltage loss of the whole bus caused by the trip of a line fault, and improves the operation reliability of the spare power automatic switching device.
Description
Technical Field
The invention relates to the technical field of power transformation secondary equipment maintenance, in particular to a backup power automatic switching locking method for a 110kV transformer substation line.
Background
With the development of relay protection and automation professional equipment of a transformer substation, the intelligent transformer substation is put into operation and used in succession, the requirement on the relay protection equipment is higher and higher, and the current part of protection equipment or protection principles cannot meet the requirement on the reliability of a power system. In the process of carrying out relay protection professional tests and project acceptance at a transformer substation, when a circuit is inspected regularly after being overhauled and the switching process of a switching-on/off overhauling state is jumped by hand, the spare power automatic switching device can be discharged and charged again, the whole process is carried out for tens of seconds, and other running intervals participating in spare power automatic switching lose the spare power automatic switching function within tens of seconds. If the running line is tripped due to a fault, the risk of voltage loss of the whole line can be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a 110kV substation circuit backup power automatic switching locking method, which is used for judging whether a circuit backup power automatic switching function is operated or not by judging the positions of isolating switches on two sides of a related circuit switch and the state of a maintenance pressing plate, so that the stable operation capability of a power system and the operation reliability of a backup power automatic switching device are improved.
In order to solve the technical problems, the invention adopts the technical scheme that:
the method comprises the steps that a 110kV substation line spare power automatic switching locking method is provided, a substation is provided with a primary loop and a secondary loop, the primary loop comprises a line switch, a bus side isolating switch and a line side isolating switch, the bus side isolating switch and the line side isolating switch are respectively arranged on two sides of the line switch, the secondary loop comprises a spare power automatic switching device, a hand trip switch and a maintenance pressing plate, and the hand trip switch and the maintenance pressing plate are in signal connection with the spare power automatic switching device; the method comprises the following steps:
s10, judging whether the position of the bus side disconnecting switch on the line is in a sub-position: if yes, go to step S20; if not, go to step S50;
s20, judging whether the position of the line side disconnecting switch on the line is divided into positions: if yes, go to step S30; if not, go to step S50;
s30, judging whether the maintenance pressing plate is put into the circuit: if yes, go to step S40; if not, go to step S50;
s40, the bus side isolating switch, the line side isolating switch and the circuit where the maintenance pressing plate is located exit the spare power automatic switching logic judgment, the hand-trip switch is switched on and off, the spare power automatic switching device cannot be locked, and the spare power automatic switching devices of other lines normally act;
s50, all lines judge whether the spare power automatic switching device is locked according to spare power automatic switching logic, and the hand-trip switch is switched on and off to control the action of the spare power automatic switching device.
The invention relates to a 110kV substation circuit spare power automatic switching locking method, which improves the internal logic program of the original spare power automatic switching device, and controls the action process of the spare power automatic switching according to the states of a bus side isolating switch, a line side isolating switch and a maintenance pressing plate, wherein the action process comprises the following steps: when the positions of the bus side disconnecting switch and the line side disconnecting switch are opening positions and the state of the maintenance pressing plate is in an input state, the spare power automatic switching function of other operation lines is reserved; under other conditions, the spare power automatic switching functions of other operating lines are locked according to the original spare power automatic switching logic, so that the risk of voltage loss of the whole bus caused by line fault tripping is avoided, the stable operating capability of the power system is given, and the operating reliability of the spare power automatic switching device is improved.
Preferably, the operation mode of the transformer substation line adopts a double-bus operation mode, the double-bus comprises a first bus and a second bus, a bus coupler switch and an isolating switch are connected between the first bus and the second bus, and the isolating switch is connected to two sides of the bus coupler switch.
Preferably, the substation line includes at least two power supply lines and a load outgoing line, and the load outgoing line is electrically connected with the power supply lines.
Preferably, the secondary circuit comprises an input signal circuit for inputting a position of the bus-side disconnecting switch, a position of the line-side disconnecting switch, a state of the maintenance pressing plate and a hand-trip switch signal, the input signal circuit is connected to the spare power automatic switching control module, and a program module of a spare power automatic switching locking method is embedded and stored in the spare power automatic switching control module.
Preferably, the input signal loop includes a bus side disconnecting switch position signal switching-in loop, a line side disconnecting switch position signal switching-in loop and an overhaul pressing plate state signal switching-in loop, which are connected to the spare power automatic switching control module, and the input signal loop adopts a strong electric signal to be respectively connected to the spare power automatic switching device according to each line to switch in the signal. The bus side isolating switch position signal switching-in loop, the line side isolating switch position signal switching-in loop are respectively connected to the spare power automatic switching device by taking auxiliary connection point positions of all the interval isolating switch positions as switching-in signals, the hand jump switch switching-in signal is connected to the spare power automatic switching device by a measurement and control device hand jump strong electric switching-in signal loop, and the maintenance pressing plate state signal is connected to the spare power automatic switching device by a protection device maintenance pressing plate state switching-in signal.
Preferably, the bus side isolation switch signal, the line side isolation switch signal, the maintenance pressure plate state signal and the hand trip switch signal are used as input quantities, and whether the backup power automatic switching device is charged or discharged is used as an output quantity to control the backup power automatic switching action. The bus side isolating switch position, the line side isolating switch position, the maintenance pressing plate state and the hand tripping signal are used as input signals to control the spare power automatic switching operation, so that the risk of voltage loss of the whole bus caused by line fault tripping is avoided, the stable operation capability of the power system is given, and the operation reliability of the spare power automatic switching device is improved.
Preferably, in step S40 and step S50, whether the hand-trip switch participates in the backup power automatic switching is controlled by controlling whether the hand-trip switch starts charging and discharging of the backup power automatic switching device, so that the problem of unreasonable locking under the condition of line maintenance is solved.
Preferably, the spare power automatic switching device adopts a PCS-9654 type device.
Compared with the prior art, the invention has the beneficial effects that:
according to the spare power automatic switching locking method, the internal logic program of the original spare power automatic switching device is improved, the action process of the spare power automatic switching is controlled according to the states of the detected bus side isolating switch, the detected line side isolating switch and the detected maintenance pressing plate, the risk of voltage loss of the whole line caused by line fault tripping is avoided, the stable operation capacity of a power system is endowed, and the operation reliability of the spare power automatic switching device is improved;
the spare power automatic switching locking method can only write the spare power automatic switching locking logic in the original spare power automatic switching device to control the spare power automatic switching action, does not influence the logic of primary equipment and the spare power automatic switching device, is simple and convenient to apply and has good applicability.
Drawings
Fig. 1 is a flow chart of a backup power automatic switching locking method for a 110kV substation line.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example one
As shown in fig. 1, an embodiment of the method for locking the backup power automatic switching of the 110kV substation line of the invention is provided, wherein the substation is provided with a primary loop and a secondary loop, the primary loop comprises a line switch, and a bus side disconnecting switch and a line side disconnecting switch which are respectively arranged at two sides of the line switch, the secondary loop comprises a backup power automatic switching device, a hand trip switch and a maintenance pressing plate, and the hand trip switch and the maintenance pressing plate are in signal connection with the backup power automatic switching device; the spare power automatic switching locking method comprises the following steps:
s10, judging whether the position of the bus side disconnecting switch on the line is positioned: if yes, go to step S20; if not, go to step S50;
s20, judging whether the position of the line side isolating switch on the line is divided into positions: if yes, go to step S30; if not, go to step S50;
s30, judging whether a maintenance pressing plate on the line is put into use: if yes, go to step S40; if not, go to step S50;
s40, the bus side isolating switch, the line side isolating switch and the line where the maintenance pressing plate is located exit the spare power automatic switching logic judgment, the hand-trip switch is switched on and off, the spare power automatic switching device cannot be locked, and the spare power automatic switching devices of other lines normally act;
s50, all lines judge whether the spare power automatic switching device is locked according to spare power automatic switching logic, and the hand-trip switch is switched on and off to control the action of the spare power automatic switching device.
The transformer substation line operation mode of this embodiment adopts double bus operation mode, and double bus includes first bus and second bus, is connected with female switch and isolator between first bus and the second bus, and the isolator connects in the both sides of female switch that allies oneself with. The transformer substation circuit comprises at least two power supply circuits and two load outgoing lines, wherein the load outgoing lines are connected with the power supply circuits; however, the number of power supply lines and load lines is not limited to the specification, and may be adjusted according to the actual application.
In this embodiment, the secondary circuit includes an input signal circuit for inputting a bus side disconnecting switch position, a line side disconnecting switch position, an overhaul pressure plate state, and a hand trip switch signal, the input signal circuit is connected to the backup power automatic switching control module, and a program module storing a backup power automatic switching locking method is embedded in the backup power automatic switching control module. The input signal loop comprises a bus side disconnecting switch position signal switching-in loop, a line side disconnecting switch position signal switching-in loop and a maintenance pressing plate state signal switching-in loop which are connected to a spare power automatic switching control module, and the input signal loop adopts strong electric signals to be respectively connected to a spare power automatic switching device according to each line to switch in signals. The bus side isolating switch position signal switching-in loop and the line side isolating switch position signal switching-in loop are respectively connected to the spare power automatic switching device by taking auxiliary connection point positions of the interval isolating switches as switching-in signals, the hand jump switch switching-in signal is connected to the spare power automatic switching device by a measurement and control device hand jump strong current switching-in signal loop, and the maintenance pressing plate state signal is connected to the spare power automatic switching device by a protection device maintenance pressing plate state switching-in signal.
In this embodiment, the backup power automatic switching locking method includes: the spare power automatic switching control module takes a bus side isolating switch signal, a line side isolating switch signal, an overhauling press plate state signal and a hand trip switch signal as input quantities, takes whether the spare power automatic switching device is charged or discharged as output quantities, controls the spare power automatic switching action, avoids the risk of voltage loss of the whole bus caused by line fault tripping, endows a power system with stable operation capacity, and improves the operation reliability of the spare power automatic switching device. In the steps S40 and S50, whether the hand-trip switch participates in the backup power automatic switching is controlled by controlling whether the hand-trip switch starts charging and discharging of the backup power automatic switching device, so that the problem that the backup power automatic switching device is unreasonable in hand-trip locking during line maintenance is avoided.
The automatic power switching device in the present embodiment is a PCS-9654 type device, which is preferable because of its general applicability and is not specified as a limitation.
Through the steps, when the positions of the bus side isolating switch and the line side isolating switch are the opening positions and the state of the maintenance pressing plate is the input state, the spare power automatic switching function of other operation lines is reserved; under other conditions, the spare power automatic switching functions of other operating lines are locked according to the original spare power automatic switching logic, so that the risk of voltage loss of the whole bus caused by line fault tripping is avoided, the stable operating capability of the power system is given, and the operating reliability of the spare power automatic switching device is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. A110 kV substation circuit spare power automatic switching locking method is characterized in that a substation is provided with a primary circuit and a secondary circuit, the primary circuit comprises a circuit switch, a bus side isolating switch and a line side isolating switch, the bus side isolating switch and the line side isolating switch are respectively arranged on two sides of the circuit switch, the secondary circuit comprises a spare power automatic switching device, a hand trip switch and a maintenance pressing plate, and the hand trip switch and the maintenance pressing plate are in signal connection with the spare power automatic switching device; the system is characterized in that the secondary circuit comprises an input signal circuit for inputting a bus side isolating switch position, a line side isolating switch position, an overhaul pressing plate state and a hand trip switch signal, the input signal circuit comprises a bus side isolating switch position signal switching-in circuit, a line side isolating switch position signal switching-in circuit and an overhaul pressing plate state signal switching-in circuit which are connected to a spare power automatic switching control module, and the input signal circuit adopts strong electric signals to be respectively connected to a spare power automatic switching device according to each line to switch in signals; the bus side isolation switch signal, the line side isolation switch signal, the overhaul pressing plate state signal and the hand trip switch signal are used as input quantities, whether the spare power automatic switching device is charged or discharged is used as an output quantity, the spare power automatic switching action is controlled, and the overhaul pressing plate state signal is accessed into the spare power automatic switching device through the protection device overhaul pressing plate state access signal; the input signal loop is connected to a spare power automatic switching control module, and a program module storing a spare power automatic switching locking method is embedded in the spare power automatic switching control module; the method comprises the following steps:
s10, judging whether the position of the bus side disconnecting switch on the line is in a sub-position: if yes, go to step S20; if not, go to step S50;
s20, judging whether the position of the line side disconnecting switch on the line is divided into positions: if yes, go to step S30; if not, go to step S50;
s30, judging whether the maintenance pressing plate is put into the circuit: if yes, go to step S40; if not, go to step S50;
s40, the bus side isolating switch, the line side isolating switch and the circuit where the maintenance pressing plate is located exit the spare power automatic switching logic judgment, the hand-trip switch is switched on and off, the spare power automatic switching device cannot be locked, and the spare power automatic switching devices of other lines normally act;
s50, all lines judge whether the spare power automatic switching device is locked according to spare power automatic switching logic, and the hand-trip switch is switched on and off to control the action of the spare power automatic switching device.
2. The 110kV substation line backup automatic switching locking method according to claim 1, wherein a double-bus operation mode is adopted in the substation line operation mode, the double-bus comprises a first bus and a second bus, a bus coupler switch and an isolating switch are connected between the first bus and the second bus, and the isolating switch is connected to two sides of the bus coupler switch.
3. The 110kV substation line backup power automatic switching locking method according to claim 2, wherein the substation line comprises at least two power lines and an outgoing line, and the outgoing line is electrically connected with the power lines.
4. The method for locking the backup power automatic switching of the 110kV substation line according to claim 3, wherein in the steps S40 and S50, whether the hand-trip switch participates in the backup power automatic switching is controlled by controlling whether the hand-trip switch starts charging and discharging of the backup power automatic switching device.
5. The 110kV substation line spare power automatic switching locking method according to claim 1, characterized in that the spare power automatic switching device is a PCS-9654 type device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910607468.XA CN110611306B (en) | 2019-07-04 | 2019-07-04 | Backup power automatic switching locking method for 110kV transformer substation line |
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| CN201910607468.XA CN110611306B (en) | 2019-07-04 | 2019-07-04 | Backup power automatic switching locking method for 110kV transformer substation line |
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| CN110611306B true CN110611306B (en) | 2021-10-08 |
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| CN111478428B (en) * | 2020-04-29 | 2021-08-24 | 广东电网有限责任公司惠州供电局 | Method for automatically matching maintenance pressing plate of automatic bus transfer device |
| CN112100544B (en) * | 2020-09-07 | 2023-03-28 | 贵州电网有限责任公司 | Spare power automatic switching installation device and spare power automatic switching action logic monitoring technology visualization method |
| CN112350317A (en) * | 2020-11-03 | 2021-02-09 | 国网新疆电力有限公司乌鲁木齐供电公司 | Spare power automatic switching misoperation-preventive locking warning device |
| CN113295992B (en) * | 2021-05-13 | 2023-12-15 | 深圳供电局有限公司 | Method for verifying locking logic relationship of isolating switch |
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| CN101917056B (en) * | 2010-08-16 | 2012-12-12 | 广东省电力调度中心 | 220kV bus switch spare automatic switching method of 550kV station |
| CN202488206U (en) * | 2012-02-21 | 2012-10-10 | 广东电网公司深圳供电局 | 110 kV system active-standby spare power automatic switching bus region fault locking device |
| CN108899901A (en) * | 2018-08-03 | 2018-11-27 | 深圳供电局有限公司 | A kind of 10kV bus prepared auto restart starting method and system |
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