CN106655462B - Double-master-station regional spare power automatic switching method - Google Patents
Double-master-station regional spare power automatic switching method Download PDFInfo
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- CN106655462B CN106655462B CN201510715869.9A CN201510715869A CN106655462B CN 106655462 B CN106655462 B CN 106655462B CN 201510715869 A CN201510715869 A CN 201510715869A CN 106655462 B CN106655462 B CN 106655462B
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Abstract
The invention discloses a double-master-station regional spare power automatic switching method, which comprises the following steps of 1: each substation device collects the state information of the substation, processes the state information into state quantity information required by the spare power automatic switching master station device and uploads the state quantity information to a network; step 2: the two spare power automatic switching main station devices respectively obtain state quantity information sent by each substation device through a network; and 3, step 3: the method comprises the steps that each spare power automatic switching master station device comprehensively obtains state quantity information to identify the running state and the fault state of a regional power grid, executes a spare power automatic switching strategy of the device, forms a whole set of starting signals and tripping and closing commands, forms an automatic switching exit signal according to whether the device is in an abnormal state or a maintenance state, and sends the signal to a network; and 4, step 4: each substation device acquires tripping and closing commands, a whole set of starting signals and automatic switching exit signals sent by the two regional spare power automatic switching master station devices, judges the effectiveness of the tripping and closing commands by integrating the signals and whether the communication state is normal or not, and actually executes the tripping and closing commands if the tripping and closing commands are effective.
Description
Technical Field
The invention relates to a double-master-station regional spare power automatic switching method.
Background
In recent years, a backup power automatic switching (backup power automatic switching) technology is widely used in 220kV and below-rated power grids, and plays an important role in maintaining the stability of the power grids and improving the power supply reliability. For a regional power grid comprising a plurality of substations, a regional spare power automatic switching technology can be adopted to realize rapid recovery power supply after the power grid fails.
The regional automatic backup power switching is usually realized by a regional automatic backup power switching system consisting of a regional automatic backup power switching logic judgment master station device and an acquisition execution substation device, any transformer substation in a regional power grid is selected by the regional automatic backup power switching system, the regional automatic backup power switching logic judgment master station device (called the standby automatic switching master station device for short) is installed on the transformer substation, the acquisition execution substation device (called the substation device for short) is installed on each transformer substation of the regional power grid, and all the substation devices interact real-time information with the regional automatic backup power switching master station device through an optical fiber communication network; each substation device collects the state information of the substation where the substation is located, forms a signal required by regional spare power automatic switching judgment after processing, transmits the signal to a regional spare power automatic switching master station device through an optical fiber communication network, and simultaneously receives a tripping and closing command issued by the regional spare power automatic switching master station device and actually executes a tripping and closing action; the regional spare power automatic switching master station device acquires panoramic information of a regional power grid through an optical fiber communication network and finishes strategy judgment of regional spare power automatic switching.
In the regional spare power automatic switching system, the logic judgment master station device is crucial and is responsible for the logic judgment of all strategies of regional spare power automatic switching. Once the logic judges that the master station device is abnormal, for example, the device is locked due to the damage of a plug-in, the regional spare power automatic switching strategy cannot be implemented; if the logic judgment master station device needs to be overhauled, the whole system also needs to be stopped; and because the logic judgment results of the regional spare power automatic switching device are not compared and verified, if the switching-on/off command is mistakenly sent, effective elimination cannot be carried out. In summary, the backup power automatic switching in the single-logic master station area needs to be improved in reliability.
Disclosure of Invention
In order to solve the problems, the invention provides a double-master-station regional spare power automatic switching method, and provides a redundant spare power automatic switching master station regional spare power automatic switching method, which can solve the problem that a spare power automatic switching master station device is abnormal or a regional spare power automatic switching system exits from running when the spare power automatic switching master station device is overhauled, and further can properly verify tripping and closing commands of the spare power automatic switching master station, so that the reliability of the regional spare power automatic switching system is improved.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a double-master-station regional automatic backup power switching method is characterized in that two automatic backup power switching master station devices are configured in a regional power grid, one substation device is configured for each substation in the regional power grid, the two automatic backup power switching master station devices and each substation device interact real-time information through a network, and the specific automatic backup power switching method comprises the following steps:
step 1: each substation device collects the state information of the substation, processes the state information into state quantity information required by the spare power automatic switching main station device and uploads the state quantity information to a network;
and 2, step: the two spare power automatic switching master station devices respectively obtain state quantity information sent by each substation device through a network;
and 3, step 3: the method comprises the steps that each spare power automatic switching master station device comprehensively obtains state quantity information to identify the running state and the fault state of a regional power grid, executes a spare power automatic switching strategy of the device, forms a whole set of starting signals and tripping and closing commands, forms an automatic switching exit signal according to whether the device is in an abnormal state or a maintenance state, and sends the signal to a network;
and 4, step 4: each substation device acquires tripping and closing commands, a whole set of starting signals and automatic switching exit signals sent by the two regional spare power automatic switching master station devices, judges the effectiveness of the tripping and closing commands by integrating the signals and whether the communication state is normal or not, and actually executes the tripping and closing commands if the tripping and closing commands are effective.
The two spare power automatic switching master station devices can adopt the same spare power automatic switching strategy or adopt spare power automatic switching strategies with different criteria.
Preferably, in step 4, each slave station device directly executes the command of tripping and closing of any of the backup automatic switching master station devices.
Preferably, in step 4, when each slave station device receives a tripping and closing command of one of the backup automatic switching master station devices, the tripping and closing command is not directly executed, and the tripping and closing command is executed only after the whole set of starting signal or tripping and closing command of the other backup automatic switching master station device is simultaneously received, or an automatic switching exit signal of the other backup automatic switching master station device is simultaneously received, or the communication of the other backup automatic switching master station device is abnormal.
The invention has the beneficial effects that:
(1) The two spare power automatic switching main station devices can be mutually used as backup supplements, if one of the two spare power automatic switching main station devices is out of operation due to device abnormity or maintenance, the other spare power automatic switching main station device can also work normally, and the regional spare power automatic switching strategy can still be executed normally.
(2) When the sub-station device adopts a comprehensive judgment processing method, the tripping and closing commands of the regional spare power automatic switching main station device can be verified, the condition that the tripping and closing commands are mistakenly sent is prevented, and the reliability of regional spare power automatic switching is improved.
Drawings
Fig. 1 is a schematic structural diagram of a backup power automatic switching system in a double-master station area according to the present invention;
FIG. 2 is a schematic flow chart of the substation device processing results of dual master stations according to the present invention;
fig. 3 is a flowchart of the integrated processing method employed by the slave station device of the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail with reference to the drawings and specific examples so that those skilled in the art can better understand the present invention and can implement the present invention, but the examples are not intended to limit the present invention.
A double-master-station regional automatic bus transfer method is disclosed, as shown in figure 1, two spare automatic bus transfer master station devices, namely a spare automatic bus transfer master station device 1 and a spare automatic bus transfer master station device 2 in the figure, are configured in a regional power grid, wherein the two spare automatic bus transfer master station devices are respectively installed on two substations of the regional power grid or are installed on the same substation of the regional power grid, namely two substations can be selected to be respectively installed in the regional power grid, or one substation can be selected to be installed together.
Each substation in the regional power grid is provided with a substation device (namely substation devices A, B, C and D in the figure), two spare power automatic switching main station devices and each substation device interact real-time information through a network, generally, the two spare power automatic switching main station devices and each substation device interact real-time information through an optical fiber communication network, and the delay of information transmission of the optical fiber communication network can reach the level of less than 1 millisecond, so that the real-time interaction of the information can be realized.
As shown in fig. 1, the transformer substations a, B, C, and D form a regional power grid of a series power supply structure, the C01 switch of the transformer substation C is in a hot standby state, and when the regional power grid fails to cause power loss of the transformer substation, the C01 switch can be turned on to recover power supply. If the substation B loses power, the hot standby switch is located in the substation C, the conventional backup power automatic switching device suitable for a single substation cannot recover power supply for the substation B by switching on the C01 switch of the substation C, the regional backup power automatic switching device for quickly recovering power supply of the whole regional power grid must be used, comprehensive judgment is carried out on the whole information of the regional power grid, when the substation B loses power, the main power supply switch B01 of the substation B is firstly switched off, and then the C01 switch of the substation C is switched on, so that the quick power recovery is realized.
The specific spare power automatic switching method comprises the following steps:
step 1: each substation device collects state information of a substation, such as analog quantity information of voltage of a substation bus, current of a line, extraction voltage and the like, switching value information of a switching position, bus protection action, main transformer protection action, line protection action and the like, and converts the information into state quantity information required by the backup automatic switching master station device by combining with local criteria, wherein the state information is updated in real time and is uploaded to an optical fiber communication network if a voltage-free and voltage-free signal, a current-free and current-free signal, a protection action signal, a locked backup automatic switching signal and the like exist.
And 2, step: the two spare power automatic switching main station devices respectively obtain the state quantity information transmitted by each substation device through the network.
And 3, step 3: the method comprises the steps that each spare power automatic switching master station device comprehensively obtains state quantity information to identify the running state and the fault state of a regional power grid, executes a spare power automatic switching strategy of the device, forms a whole set of starting signals and tripping and closing commands, forms an automatic switching exit signal according to whether the device is in an abnormal state or a maintenance state, and sends the signal to a network;
the method comprises the steps that two spare power automatic switching master station devices acquire state quantity information sent by substation devices of all substations from an optical fiber communication network, the state quantity information is integrated, the regional spare power automatic switching master station devices can obtain panoramic information of a regional power grid, on the basis, the two spare power automatic switching master station devices execute regional spare power automatic switching strategies, if the regional power grid fails, a power supply recovery strategy judging process is started, firstly, a whole set of starting signals are sent out to indicate that the regional power grid needs to be rapidly recovered and power supply is required to be rapidly recovered, the devices enter a strategy judging process, then, a switch suitable for isolating the failure is determined according to self criteria and tripping setting delay, a tripping command is sent out, after the switch is confirmed to be tripped, a command of switching-on a hot standby switch is sent out after the switching-on setting delay, the whole set of starting signals and the tripping-on command are sent to the optical fiber communication network, and the whole set of starting signals and the tripping-on command are actually executed after being collected by the substation devices.
The two spare power automatic switching master station devices can adopt completely same regional spare power automatic switching strategies or regional spare power automatic switching strategies with different criteria. In the first case, the two master station apparatuses are in standby with each other, and the results of the strategies can be verified against each other, thereby improving the reliability of the regional backup automatic switch. If two master station devices adopt the regional backup automatic switching strategies with different criteria, for example, the two master stations are produced by different manufacturers, and the internal logics are different, or the two master stations are produced by the same manufacturer but adopt completely different strategies, for example, as the regional power grid in fig. 1, one master station adopts the criterion which takes voltage as the main criterion, and mainly carries out strategy judgment according to the voltage loss of the transformer substation, and the other master station adopts the criterion which takes the switch position and the protection action as the main criterion, and mainly carries out strategy judgment according to the position change of each switch and the condition of the protection action of the regional power grid, under the condition, the effects that the devices of different manufacturers or the devices with different criteria are mutually verified and mutually supplemented can be realized.
When the spare power automatic switching master station device cannot carry out regional spare power automatic switching logic judgment, an automatic switching exit signal is generated and sent to the optical fiber communication network. For example, when the device detects that the own regional backup power automatic switching strategy cannot be normally executed due to the damage of the own plug-in or communication failure and other reasons, an automatic switching exit signal is sent; or the device quits the regional spare power automatic switching function due to maintenance and also sends an automatic switching quit signal.
And 4, step 4: each substation device acquires tripping and closing commands, a whole set of starting signals and automatic switching exit signals sent by the two regional spare power automatic switching master station devices, judges the effectiveness of the tripping and closing commands by integrating the signals and whether the communication state is normal or not, and actually executes the tripping and closing commands if the tripping and closing commands are effective. Wherein, each sub-station device can select one of the following two processing methods: the or logic processing method and the integrated discrimination processing method may be set in the slave station device by setting control words as shown in fig. 2, or may be switched by a platen method.
When the 'OR' logic processing mode is selected, the substation device executes tripping and closing operations after receiving a tripping and closing command of any spare power automatic switching main station device. The logical processing mode or is used for preventing one spare power automatic switching master station device from being incapable of normally executing the regional spare power automatic switching strategy judgment due to hardware reasons, software defects, device maintenance and the like, and ensuring that the other spare power automatic switching master station device restores the normal execution of the power supply strategy, namely the two regional spare power automatic switching master station devices are mutually standby and complementary, and when one spare power automatic switching master station device quits, the other spare power automatic switching master station device can normally execute the regional spare power automatic switching strategy, so that the method or the system is greatly improved in the aspect of ensuring the reliable execution of the regional spare power automatic switching compared with the regional spare power automatic switching of a single master station.
When the comprehensive processing mode is selected, the processing flow is as shown in fig. 3, when the substation device receives a tripping and closing command of one of the regional backup automatic switching master station devices, the substation device does not directly execute the tripping and closing command, and must simultaneously receive a whole set of starting signals or a tripping and closing command of another regional backup automatic switching master station device, or simultaneously receive an automatic switching exit signal of another regional backup automatic switching master station device, or when another regional backup automatic switching master station device is abnormal in communication, the substation device can execute the tripping and closing command. If the substation device receives tripping and closing commands of the two regional spare power automatic switching master station devices at the same time, a mutual verification effect is formed, the tripping and closing commands are judged to be effective, and the tripping and closing commands are executed. However, considering that the two regional backup automatic switching master station devices may not receive the tripping and closing commands at the same time due to different strategies or different tripping and closing setting delays, in order to prevent this situation, when the tripping and closing command of one regional backup automatic switching master station device is received and a whole set of starting signals of another regional backup automatic switching master station device are simultaneously provided, it indicates that both the two regional backup automatic switching master station devices have identified the regional power grid fault and enter a power restoration strategy judgment process, and in this case, it is also determined that the tripping and closing command is valid and executed. If a tripping and closing command of one regional spare power automatic switching master station device is received and the other regional spare power automatic switching master station device cannot normally execute a regional spare power automatic switching strategy, including receiving an automatic switching exit signal of the other regional spare power automatic switching master station device or communicating with the other regional spare power automatic switching master station device abnormally, the tripping and closing result of the normal regional spare power automatic switching master station device is used as the criterion. By adopting a comprehensive processing mode, the validity verification of the tripping and closing command can be enhanced, the condition that the tripping and closing command is mistakenly sent is prevented, and the reliability of regional spare power automatic switching is improved.
It should be noted that, after the double-master-station regional automatic switching method is adopted, due to the difference of criteria or the difference of tripping and closing delay setting, a condition that two spare automatic switching master station devices send tripping and closing commands in sequence may occur, which does not have any adverse effect on a regional power grid. If the switch is tripped after the first tripping command is executed, the tripping loop is disconnected, and even if the tripping command occurs again, the second tripping command cannot be actually executed because the tripping loop is not conducted any more; similarly, if the first closing command is executed and the switch is closed, the closing loop is disconnected, and even if the closing command occurs again, the second closing command cannot be actually executed because the closing loop is not switched on. In another case, if the first tripping and closing command is not successfully executed, the second tripping and closing command can also play a role in backup and supplement tripping and closing.
The beneficial effects of the invention are:
(1) The two spare power automatic switching main station devices can be mutually used as backup supplements, if one of the two spare power automatic switching main station devices is out of operation due to device abnormity or maintenance, the other spare power automatic switching main station device can also work normally, and the regional spare power automatic switching strategy can still be executed normally.
(2) When the sub-station device adopts the comprehensive judgment processing method, the tripping and closing commands of the regional spare power automatic switching main station device can be verified, the condition of mistakenly sending the tripping and closing commands is prevented, and the reliability of regional spare power automatic switching is improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A double-master-station regional automatic backup power switching method is characterized in that two automatic backup power switching master station devices are configured in a regional power grid, one substation device is configured for each substation in the regional power grid, the two automatic backup power switching master station devices and each substation device interact real-time information through a network, and the specific automatic backup power switching method comprises the following steps:
step 1: each substation device collects the state information of the substation, processes the state information into state quantity information required by the spare power automatic switching master station device and uploads the state quantity information to a network;
step 2: the two spare power automatic switching main station devices respectively obtain state quantity information sent by each substation device through a network;
and step 3: the method comprises the steps that each spare power automatic switching master station device comprehensively obtains state quantity information to identify the running state and the fault state of a regional power grid, executes a spare power automatic switching strategy of the device, forms a whole set of starting signals and tripping and closing commands, forms an automatic switching exit signal according to whether the device is in an abnormal state or a maintenance state, and sends the signal to a network;
and 4, step 4: each substation device acquires tripping and closing commands, whole set of starting signals and automatic switching exit signals sent by the two regional spare automatic switching main station devices, integrates the signals and whether the communication state is normal or not, judges the effectiveness of the tripping and closing commands, and actually executes the tripping and closing commands if the tripping and closing commands are effective.
2. The method of claim 1, wherein two spare power automatic switching master station devices use the same spare power automatic switching strategy.
3. The method of claim 1, wherein the two spare power automatic switching master station devices adopt spare power automatic switching strategies with different criteria.
4. The method according to claim 1, wherein in step 4, each slave station device directly executes after receiving a tripping and closing command from any slave station device.
5. The method for automatic backup power switching in a double-master station area according to claim 1, wherein in step 4, each slave station device does not directly execute a trip/close command when receiving a trip/close command from one of the backup automatic switching master station devices, and executes the trip/close command only after receiving a whole set of start signal or a trip/close command from the other backup automatic switching master station device at the same time, or when receiving an automatic switching exit signal from the other backup automatic switching master station device at the same time, or when the other backup automatic switching master station device is abnormal in communication.
6. The method according to any one of claims 1 to 5, wherein two backup power automatic switching master station devices and each substation device interact with real-time information through an optical fiber communication network.
7. The method for double-master-station regional automatic backup power switching according to claim 6, characterized in that two automatic backup power switching master station devices are respectively installed on two substations of a regional power grid or on the same substation of the regional power grid.
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| CN108599095B (en) * | 2018-06-22 | 2023-07-11 | 深圳供电局有限公司 | Safety device integrating bus-tie spare power automatic switching and main transformer spare power automatic switching functions |
| CN110601350B (en) * | 2019-09-23 | 2024-06-25 | 云南电网有限责任公司曲靖供电局 | High-voltage self-adaptive regional automatic switching system and automatic switching control method thereof |
| CN112327153B (en) * | 2020-11-02 | 2022-08-23 | 国网山东省电力公司临朐县供电公司 | Use method of spare power automatic switching analog circuit breaker test device |
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