CN113991695B - Reactive power compensation equipment switching method and device - Google Patents
Reactive power compensation equipment switching method and device Download PDFInfo
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- CN113991695B CN113991695B CN202111265184.0A CN202111265184A CN113991695B CN 113991695 B CN113991695 B CN 113991695B CN 202111265184 A CN202111265184 A CN 202111265184A CN 113991695 B CN113991695 B CN 113991695B
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- 238000012544 monitoring process Methods 0.000 claims description 31
- 238000012163 sequencing technique Methods 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a reactive power compensation equipment switching method and device. The reactive power compensation equipment switching method comprises the following steps: counting the respective continuous operation time of all the reactive power compensation devices in operation in the transformer substation; and when the continuous operation time of the reactive compensation equipment in operation reaches a first time threshold, if the reactive compensation equipment in operation is exited, the characteristic parameters of the transformer substation are not out of limit, and the reactive compensation equipment in operation is exited. The embodiment of the invention can realize the alternate operation of the reactive power compensation equipment, avoid the failure of the reactive power compensation equipment caused by long-time operation, and improve the operation safety of a power grid system.
Description
Technical Field
The embodiment of the invention relates to the technical field of power systems, in particular to a reactive power compensation equipment switching method and device.
Background
In a grid system, each substation is configured with a certain number of reactive compensation devices in order to maintain reactive balance and voltage stability. The existing power grid system dispatching is realized through an AVC system (Automatic Voltage Control, automatic voltage control system), and particularly key measurement data such as bus voltage of each transformer substation and each power plant are collected through a dispatching automation SCADA system (Supervisory Control And Data Acquisition, data collection and monitoring control system), centralized monitoring and analysis calculation are carried out, and reactive compensation equipment is automatically switched according to requirements. However, the existing control strategy lacks of a rotation strategy for the reactive power compensation equipment, so that part of the reactive power compensation equipment is easy to run for a long time, the reactive power compensation equipment is easy to fail, the failure trips, the problems of explosion, switching failure override trip and the like occur when the failure trips are light, and the safe operation of a power grid system is influenced.
Disclosure of Invention
The embodiment of the invention provides a reactive power compensation equipment switching method and device, which are used for realizing the alternate operation of the reactive power compensation equipment, avoiding the failure of the reactive power compensation equipment caused by long-time operation and improving the operation safety of a power grid system.
In a first aspect, an embodiment of the present invention provides a reactive compensation device switching method, including:
counting the respective continuous operation time of all the reactive power compensation devices in operation in the transformer substation;
And when the continuous operation time of the reactive compensation equipment in operation reaches a first time threshold, if the reactive compensation equipment in operation is exited, the characteristic parameters of the transformer substation are not out of limit, and the reactive compensation equipment in operation is exited.
Optionally, the reactive compensation equipment switching method further includes:
if the reactive compensation equipment in operation is exited, the characteristic parameters of the transformer substation are out of limit, and whether the reactive compensation equipment to be put into exists in the transformer substation is judged;
If the reactive compensation equipment exists, judging whether the characteristic parameters of the transformer substation are out of limit or not after the reactive compensation equipment to be input is input and then the reactive compensation equipment in operation is withdrawn;
if the reactive power compensation equipment is not out of limit, the reactive power compensation equipment to be put into operation is put into operation, and the reactive power compensation equipment in operation is withdrawn;
if the reactive power compensation equipment is out of limit, switching of the reactive power compensation equipment is not carried out, and continuous operation time of the reactive power compensation equipment in operation is continuously counted.
Optionally, after continuing to count the continuous operation time of the reactive compensation device in operation, further comprising:
Judging whether the reactive compensation equipment in operation with the continuous operation time being larger than a second time threshold exists or not; wherein the second time threshold is greater than the first time threshold;
If so, an alarm signal is output.
Optionally, after outputting the alarm signal, the method further comprises:
and after receiving the intervention signal triggered by the user, exiting the reactive compensation equipment in operation.
Optionally, the reactive compensation equipment switching method further includes:
If no reactive power compensation equipment in operation with the continuous operation time being greater than a second time threshold exists, carrying out-of-limit judgment on the reactive power compensation equipment in operation one by one;
if both the reactive power compensation devices are out of limit, continuously judging whether the reactive power compensation devices in operation with the continuous operation time being greater than a second time threshold exist or not;
Otherwise, sequencing the continuous operation time of all the running reactive compensation equipment meeting the condition that the characteristic parameters are not out of limit after exiting from long to short according to the time; and exit the reactive compensation device in operation with the longest duration of operation.
Optionally, after exiting the running reactive compensation device, further comprising: and clearing the continuous running time corresponding to the withdrawn reactive compensation equipment.
Optionally, the reactive power compensation device switching method further includes: and displaying the reactive power compensation equipment in operation and the corresponding continuous operation time in a monitoring data table.
Optionally, after exiting the running reactive compensation device, further comprising: and clearing the relevant data of the withdrawn reactive compensation equipment from the monitoring data table.
Optionally, the characteristic parameters include: bus voltage and/or gate power factor.
In a second aspect, an embodiment of the present invention further provides a reactive compensation device switching apparatus, including:
the time statistics module is used for counting the respective continuous operation time of all the reactive compensation devices in operation in the transformer substation;
and the exit control module is used for exiting the reactive compensation equipment in operation if the characteristic parameters of the transformer substation are not out of limit when the continuous operation time of the reactive compensation equipment in operation reaches a first time threshold value.
According to the reactive power compensation equipment switching method provided by the embodiment of the invention, the continuous operation time factor of the reactive power compensation equipment is introduced as one of decision basis of switching of the reactive power compensation equipment, so that the alternate operation of the reactive power compensation equipment in the transformer substation can be realized, the failure of the reactive power compensation equipment caused by long-time operation is avoided, and the operation safety of a power grid system is improved.
Drawings
Fig. 1 is a schematic flow chart of a reactive power compensation equipment switching method provided by an embodiment of the invention;
fig. 2 is a schematic flow chart of another switching method of reactive compensation equipment according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a reactive power compensation device switching apparatus according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The embodiment of the invention provides a reactive power compensation equipment switching method, which can be realized based on a reactive power compensation equipment switching device, can be used as a supplement to reactive power dispatching strategies in a power grid system, and is suitable for reactive power adjustment requirements of substations of various levels. Fig. 1 is a schematic flow chart of a reactive compensation equipment switching method provided by an embodiment of the invention. Referring to fig. 1, the reactive power compensation equipment switching method includes:
S110, counting the respective continuous operation time of all the reactive power compensation devices in operation in the transformer substation.
The reactive compensation equipment can be a capacitor group, a reactor group and other reactive compensation equipment. The control system can perform centralized monitoring, analysis and calculation of the running state of the power grid by collecting key measurement data such as bus voltage, bus reactive power, main transformer high-low voltage side reactive power and the like, and automatically throw a capacitor bank or a reactor bank in the shear power station according to bus voltage level, gateway power factor and reactive power condition so as to realize reactive power regulation. When the capacitor bank is put into, reactive power can be supplemented, and bus voltage is improved; when the reactor group is put into operation, reactive power can be consumed, the bus voltage is reduced, and the reactive compensation equipment is opposite in function. The continuous operating time is the duration of the current operation of the reactive power compensation system, i.e. the time from the time the reactive power compensation system is put into operation.
And S120, when the continuous operation time of the reactive power compensation equipment in operation reaches a first time threshold, if the reactive power compensation equipment in operation is exited, the characteristic parameters of the transformer substation are not out of limit, and the reactive power compensation equipment in operation is exited.
The first time threshold may be understood as an optimal rotation time threshold, and the value thereof may be specifically set according to actual requirements, for example, comprehensively considering the running state of the reactive power compensation device and the fluctuation caused by switching of the reactive power compensation device to the power grid. Illustratively, the first time threshold may be 24 hours, 36 hours, or other value. The operation of S120 may be performed for any one of the reactive compensation devices in operation.
Optionally, the characteristic parameters include: bus voltage and/or gate power factor. In a standard document related to the operation process of the power grid, normal operation voltage ranges of buses arranged at different positions or at different voltage levels are generally specified; and prescribes the qualification range of the power factor of the main transformer output side equal-weight point gateway. Then, the conditions for which the characteristic parameters of the substation are not out of limit include: the bus voltage does not exceed the upper voltage limit and is not lower than the lower voltage limit, and/or the gateway power factor does not exceed the upper power factor limit and is not lower than the lower power factor limit.
According to the reactive power compensation equipment switching method provided by the embodiment of the invention, the continuous operation time factor of the reactive power compensation equipment is introduced as one of decision basis of switching of the reactive power compensation equipment, so that the alternate operation of the reactive power compensation equipment in the transformer substation can be realized, the failure of the reactive power compensation equipment caused by long-time operation is avoided, and the operation safety of a power grid system is improved.
Fig. 2 is a schematic flow chart of another switching method of reactive compensation equipment according to an embodiment of the present invention.
Referring to fig. 2, the reactive compensation equipment switching method can be completed by a control system, and specifically comprises the following steps:
s210, counting the respective continuous operation time of all the reactive power compensation devices in operation in the transformer substation.
The control system may include an AVC system, and the statistics step may be automatically performed by the AVC system. For reactive compensation equipment in an operation state, when the reactive compensation equipment is put into operation, the AVC system can automatically transmit the equipment name and the input time to a monitoring data table for centralized monitoring; after the relevant data are transferred to the monitoring data table, the system can automatically calculate the current continuous running time of the reactive compensation equipment in real time and display the current continuous running time in the monitoring data table, so that monitoring personnel can know the running state of the plant station according to the monitoring data table. Table 1 exemplarily gives details of a monitoring data table.
TABLE 1
| Station name | Device name | Switching state | Time of throw-in | Continuous run time |
| Substation A | Reactive power compensation device 1 | Input into | Time1 | T1 |
| Substation A | Reactive compensation equipment 2 | Input into | Time2 | T2 |
| Substation B | Reactive compensation equipment 3 | Input into | Time3 | T3 |
| … | … | … | … | … |
Referring to table 1, illustratively, five columns of contents including a plant station name, a device name, a switching state, a switching time and a continuous running time may be included in the monitoring data table, so that real-time monitoring of all reactive compensation devices of each plant station within the control range of the AVC system is realized. The device name may include a device class, a device type, or a device number, etc. that may be used to distinguish the content of each reactive compensation device within the plant. The on-off state may be indicated by an indicator light, for example, an indicator light turning red to indicate on, an indicator light turning green to indicate off. The throw-in time may be accurate to seconds. The duration of operation may be calculated in units of hours. For example, all reactive compensation devices may be included in the monitoring data table, or only reactive compensation devices that are put into operation. Alternatively, the monitoring data table may be sorted in descending order according to the time of investment or in descending order according to the continuous running time, so that the monitoring personnel can find reactive compensation equipment with too long time of investment in time.
S220, judging whether the continuous operation time reaches a first time threshold; if yes, executing S230; otherwise, S210 is continued.
S230, judging whether the characteristic parameters of the transformer substation are out of limit if the reactive compensation equipment in operation is exited; if yes, executing S250; otherwise, S240 is performed.
S240, exiting the reactive compensation equipment in operation.
S250, judging whether reactive compensation equipment to be put into exists in the transformer substation; if yes, executing S260; otherwise, S280 is performed.
If the reactive compensation equipment in the operation is withdrawn, the characteristic parameters of the transformer substation are out of limit, and no other reactive compensation equipment to be put into the transformer substation can be changed, the reactive compensation equipment is withdrawn temporarily, so that the normal operation of the power grid system is not affected. When the out-of-limit condition is subsequently satisfied, the reactive compensation equipment with long continuous operation time can be preferentially exited.
S260, judging whether the characteristic parameters of the transformer substation are out of limit or not if the reactive compensation equipment to be put in is put into the reactive compensation equipment to be put in and then the reactive compensation equipment in operation is taken out; if yes, executing S280; otherwise, S270 is performed.
S270, putting the reactive compensation equipment to be put into operation, and exiting the reactive compensation equipment in operation.
The reactive compensation device to be put into operation may be one device or a combination of devices, which corresponds to the selection of a reactive compensation device that is not put into operation for replacement of the reactive compensation device in operation. In the step, the reactive compensation equipment with the longest operation time can be put into operation from the equipment to be put into operation under the condition, so that the input failure caused by refusal of part of reactive compensation equipment due to long-term empty operation is avoided, and the operation safety and reliability of the power grid system are further improved.
And S280, switching of the reactive compensation equipment is not performed, and the continuous operation time of the reactive compensation equipment in operation is continuously counted.
S290, judging whether the reactive compensation equipment in operation with the continuous operation time being larger than a second time threshold exists; if yes, executing S2A0; otherwise, S2C0 is executed.
Wherein the second time threshold is greater than the first time threshold; the second time threshold may be understood as the upper limit value of the safe running time of the reactive compensation device. If reactive power compensation equipment with the continuous operation time exceeding a second time threshold value appears, timely alarming is needed to remind workers of manual intervention. For example, the reason for the presence of reactive compensation equipment whose duration of operation exceeds the second time threshold may be: 1. the reasons for the rotation strategy are as follows: there is no reactive compensation equipment available in the system for the rotation. 2. System failure: the AVC system selects to exit the reactive compensation equipment, but the control fails, or the reactive equipment fails and cannot automatically exit; because of thousands of AVC system strategies, workers may not be able to discover and handle the abnormality in time, and a timely alarm is necessary to avoid continuous abnormal operation of the device.
S2A0, outputting an alarm signal.
Wherein, the alarm signal can be in the form of audible and visual alarm.
S2B0, after receiving an intervention signal triggered by a user, exiting the reactive compensation equipment in operation.
After receiving the alarm signal, the user (such as a monitoring person) can perform manual intervention on the control system, and forcedly exit the reactive compensation equipment on the basis of ensuring the normal operation of the power grid system. Illustratively, the control system further comprises a remote control system. The remote control system and the AVC system together form a control system, the automatic control of the AVC system is taken as the main part, and the remote control system is used as the supplement to the AVC system. The manual intervention process may be performed by a remote control system, and the user may send an intervention signal by means of the remote control system, for example, to control the relay for switching the reactive compensation device into the power grid to be disconnected and to withdraw the reactive compensation device in operation. If the remote control exit still fails, the monitoring personnel can inform team personnel to go to the station for field inspection, provide the margin for the reactive compensation equipment exit through multi-voltage-level association adjustment, and then exit the reactive compensation equipment with the timeout.
S2C0, judging whether all the reactive compensation equipment in operation does not meet the out-of-limit condition of the characteristic parameters after exiting; if yes, executing S280; otherwise, S2D0 is executed.
If no reactive power compensation equipment with the continuous operation time exceeding the second time threshold exists, the AVC system can perform out-of-limit judgment one by one aiming at the reactive power compensation equipment in operation in real time so as to find the reactive power compensation equipment which can be withdrawn as timely as possible.
S2D0, sequencing the continuous operation time of all the reactive compensation equipment in operation meeting the condition that the characteristic parameters are not out of limit after exiting from long to short according to the time; and the reactive compensation device in operation with the longest continuous operation time is withdrawn.
And if only one reactive power compensation device which is in operation and meets the condition that the characteristic parameters are not out of limit after the reactive power compensation device exits, the reactive power compensation device is directly exited.
In summary, the embodiment of the invention realizes the switching method of the reactive power compensation equipment based on the continuous operation time through S210-S2D 0. The method can be used for supplementing and optimizing the reactive power control strategy of the mature AVC system, and under the condition that the existing control strategy can meet the voltage and reactive power balance, continuous operation time factors are introduced, the rotation of reactive power compensation equipment is enhanced, and faults caused by long-time operation of the reactive power compensation equipment are avoided. And the continuous operation time is summarized and incorporated into a monitoring data table for centralized monitoring, so that system monitoring staff can find reactive power compensation equipment with overlong operation time in time and perform manual intervention, and can perform fault treatment in time when faults occur, and the abnormal continuous deterioration of the equipment is avoided. And even if monitoring personnel miss alarms, reactive compensation equipment with long continuous operation time can be discovered by periodically checking a monitoring data table.
It should be noted that in the switching process of the whole reactive compensation equipment, the characteristic parameters of the transformer substation are required to be ensured not to be out of limit so as to ensure the safe and stable operation of the power grid system.
It should also be noted that the steps described above are only illustrative and not limiting of the present invention. In practical application, the content and the sequence of each step can be adjusted according to the requirement.
On the basis of the above embodiments, optionally, after the reactive compensation device in operation is exited, the continuous operation time corresponding to the exited reactive compensation device may be cleared, so that the continuous operation time may be reckoned when the reactive compensation device is put into operation next time.
On the basis of the above embodiments, optionally, after the reactive compensation device in operation is exited, the relevant data of the exiting reactive compensation device may be cleared from the monitoring data table, so that only the relevant data of the reactive compensation device in operation is displayed in the monitoring data table, so as to reduce the data amount in the monitoring data table.
The embodiment of the invention also provides a reactive power compensation equipment switching device which is used for realizing the reactive power compensation equipment switching method provided by any embodiment of the invention, and has corresponding beneficial effects. Fig. 3 is a schematic structural diagram of a reactive power compensation device switching apparatus according to an embodiment of the present invention. Referring to fig. 3, the reactive power compensation equipment switching device includes: a time statistics module 110 and an exit control module 120.
The time statistics module 110 is used for counting respective continuous operation time of all the reactive power compensation devices in operation in the transformer substation. The exit control module 120 is configured to exit the reactive compensation device in operation if the characteristic parameter of the transformer substation does not exceed the limit when the duration of the reactive compensation device in operation reaches the first time threshold.
In the reactive compensation equipment switching device provided by the embodiment of the invention, the time statistics module 110 and the exit control module 120 are arranged, and the continuous operation time factor of the reactive compensation equipment is introduced to serve as one of decision basis of switching of the reactive compensation equipment, so that the alternate operation of the reactive compensation equipment in the transformer substation can be realized, the failure of the reactive compensation equipment caused by long-time operation is avoided, and the operation safety of a power grid system is improved.
On the basis of the above embodiments, optionally, the reactive compensation device switching apparatus further includes: the device comprises a device to be put into judgment module and a device to be put into and out of limit judgment module. And the equipment to be put into operation judging module is used for judging whether the reactive compensation equipment to be put into operation exists in the transformer substation when the characteristic parameters of the transformer substation are over the limit after the reactive compensation equipment in operation is withdrawn. And the switching out-of-limit judging module is used for judging whether the characteristic parameters of the transformer substation are out of limit or not if the reactive compensation equipment to be put in is put into the reactive compensation equipment to be put in and then the reactive compensation equipment in operation is withdrawn. The exit control module 120 is further configured to, after the reactive compensation device to be put into operation is put into operation, exit the reactive compensation device in operation, and put into the reactive compensation device to be put into operation when the characteristic parameter of the transformer substation is not limited. The time statistics module 110 is further configured to, after the reactive compensation device to be put into operation is put into operation, log out the reactive compensation device, and when the characteristic parameter of the transformer substation is more limited, not switch on/off the reactive compensation device, and continue to count the duration operation time of the reactive compensation device in operation.
On the basis of the above embodiments, optionally, the reactive compensation device switching apparatus further includes: a time judging module and an alarming module. The time judging module is used for judging whether the running reactive power compensation equipment with the continuous running time being larger than a second time threshold exists or not after the continuous running time of the running reactive power compensation equipment is continuously counted; wherein the second time threshold is greater than the first time threshold. The alarm module is used for outputting an alarm signal when the running reactive compensation equipment with the continuous running time being larger than the second time threshold value exists.
On the basis of the above embodiments, optionally, the reactive compensation device switching apparatus further includes: and the intervention control module is used for exiting the reactive compensation equipment in operation after receiving the intervention signal triggered by the user after outputting the alarm signal.
On the basis of the above embodiments, optionally, the reactive compensation device switching apparatus further includes: the device comprises a judging module and a sequencing control module one by one. And the one-by-one judging module is used for judging whether the reactive compensation equipment in operation exits out of limit one by one when the reactive compensation equipment in operation with the continuous operation time being longer than the second time threshold value does not exist. The time threshold judging module is further used for continuously judging whether the running reactive power compensation equipment with the continuous running time being greater than the second time threshold exists or not when all the running reactive power compensation equipment does not meet the out-of-limit condition of the characteristic parameters after the reactive power compensation equipment exits. The sequencing control module is used for sequencing the continuous running time of all the reactive power compensation devices in running meeting the condition that the characteristic parameters are not out of limit from long to short when the reactive power compensation devices meeting the condition that the characteristic parameters are not out of limit after being withdrawn exist; and the reactive compensation device in operation with the longest continuous operation time is withdrawn.
On the basis of the above embodiments, optionally, the reactive compensation device switching apparatus further includes: and the zero clearing module is used for clearing the continuous running time corresponding to the withdrawn reactive compensation equipment after withdrawing the reactive compensation equipment in running.
On the basis of the above embodiments, optionally, the reactive compensation device switching apparatus further includes: and the display module is used for displaying the reactive power compensation equipment in operation and the corresponding continuous operation time in the monitoring data table.
On the basis of the above embodiments, optionally, the reactive compensation device switching apparatus further includes: and the clearing module is used for clearing the relevant data of the withdrawn reactive compensation equipment from the monitoring data table after the reactive compensation equipment in operation is withdrawn.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. The reactive power compensation equipment switching method is characterized by comprising the following steps of:
counting the respective continuous operation time of all the reactive power compensation devices in operation in the transformer substation;
When the continuous running time of the running reactive power compensation equipment reaches a first time threshold, if the running reactive power compensation equipment is exited, the characteristic parameters of the transformer substation are not out of limit, and the running reactive power compensation equipment is exited;
if the reactive compensation equipment in operation is exited, the characteristic parameters of the transformer substation are out of limit, and whether the reactive compensation equipment to be put into exists in the transformer substation is judged;
If the reactive compensation equipment exists, judging whether the characteristic parameters of the transformer substation are out of limit or not after the reactive compensation equipment to be input is input and then the reactive compensation equipment in operation is withdrawn;
if the reactive power compensation equipment is not out of limit, the reactive power compensation equipment to be put into operation is put into operation, and the reactive power compensation equipment in operation is withdrawn;
If the reactive power compensation equipment is out of limit, switching of the reactive power compensation equipment is not performed, and continuous operation time of the reactive power compensation equipment in operation is continuously counted;
After continuing to count the continuous operation time of the reactive compensation equipment in operation, the method further comprises:
Judging whether the reactive compensation equipment in operation with the continuous operation time being larger than a second time threshold exists or not; wherein the second time threshold is greater than the first time threshold;
If yes, outputting an alarm signal;
If no reactive power compensation equipment in operation with the continuous operation time being greater than a second time threshold exists, carrying out-of-limit judgment on the reactive power compensation equipment in operation one by one;
if both the reactive power compensation devices are out of limit, continuously judging whether the reactive power compensation devices in operation with the continuous operation time being greater than a second time threshold exist or not;
Otherwise, sequencing the continuous operation time of all the running reactive compensation equipment meeting the condition that the characteristic parameters are not out of limit after exiting from long to short according to the time; and exit the reactive compensation device in operation with the longest duration of operation.
2. The reactive compensation equipment switching method according to claim 1, further comprising, after outputting the alarm signal:
and after receiving the intervention signal triggered by the user, exiting the reactive compensation equipment in operation.
3. The reactive compensation equipment switching method according to any one of claims 1-2, characterized by further comprising, after exiting the running reactive compensation equipment: and clearing the continuous running time corresponding to the withdrawn reactive compensation equipment.
4. The reactive compensation equipment switching method of claim 1, further comprising: and displaying the reactive power compensation equipment in operation and the corresponding continuous operation time in a monitoring data table.
5. The reactive compensation equipment switching method of claim 4, further comprising, after exiting the running reactive compensation equipment:
And clearing the relevant data of the withdrawn reactive compensation equipment from the monitoring data table.
6. The reactive compensation equipment switching method according to claim 1, wherein the characteristic parameters include: bus voltage and/or gate power factor.
7. Reactive compensation equipment switching device, characterized by being configured to perform the reactive compensation equipment switching method according to any one of claims 1-6, the reactive compensation equipment switching device comprising:
the time statistics module is used for counting the respective continuous operation time of all the reactive compensation devices in operation in the transformer substation;
and the exit control module is used for exiting the reactive compensation equipment in operation if the characteristic parameters of the transformer substation are not out of limit when the continuous operation time of the reactive compensation equipment in operation reaches a first time threshold value.
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