CN111864894A - Remote uninterrupted power transmission calibration method suitable for line protection device - Google Patents
Remote uninterrupted power transmission calibration method suitable for line protection device Download PDFInfo
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- CN111864894A CN111864894A CN201910341499.5A CN201910341499A CN111864894A CN 111864894 A CN111864894 A CN 111864894A CN 201910341499 A CN201910341499 A CN 201910341499A CN 111864894 A CN111864894 A CN 111864894A
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- protection device
- remote
- line protection
- state
- transmission
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
Abstract
The invention designs a remote uninterrupted transmission calibration method suitable for a line protection device. The invention issues the uninterrupted transmission command to the protection device of the normal power supply line in a remote control mode, the circuit protection device judges that the conditions are met and then executes the uninterrupted transmission outlet tripping circuit breaker, and the circuit power supply can be recovered through the automatic reclosing, thereby completing the verification of the tripping and closing loop of the circuit protection device. The invention realizes that the operation can be completed only by operating personnel at a remote place without the need of the operating personnel to arrive at the site for operation on the device, thereby ensuring the personal safety of the operating and maintaining personnel and improving the maintenance efficiency of equipment such as a line protection device, a circuit breaker and the like.
Description
Technical Field
The invention relates to the technical field of relay protection of power systems, in particular to a remote uninterrupted transmission calibration method suitable for a line protection device.
Background
With the development of the smart power grid, some new development trends appear in the construction of the transformer substation:
one trend is that secondary equipment is gradually moved from cubicle to outdoors, and various local installation forms are appeared. Protection in-situ installation is a scheme for configuring a protection device and primary equipment in a short distance, can obviously save the occupied area of a transformer substation in construction, reduce the loss of sampling cable materials and power, and simplify the cable connection between the protection device and equipment such as a mutual inductor, a switch and the like. Wherein line protection device adopts independent arrangement on the spot, and 35kV reaches a lot of switch cabinet mounting means that adopt of following line protection, and fortune dimension maintainer need carry out periodic check-up work to the on-the-spot chemical protection, and is nearer apart from circuit breaker equipment distance, and this can increase the risk in the aspect of fortune dimension maintainer personal safety.
Another trend is the mass emergence of unattended substations. The unattended transformer substation is a relatively advanced transformer substation operation management mode in the current transformer substation construction, and relevant information in the power grid operation is automatically collected, monitored and controlled by adopting novel intelligent equipment, so that the intelligent adjustment of the power grid is realized, and the development concept of reducing personnel and increasing efficiency of a power enterprise is practiced.
The most outstanding characteristic of the unattended transformer substation lies in the application of intelligent equipment, so that the link of manual on-duty operation is omitted, fixed maintenance and management personnel are not needed in the unattended transformer substation, and the management work of the transformer substation is mainly completed by scheduling personnel through remote control. However, in the existing maintenance of the line protection device and the secondary circuit thereof in the substation, after power failure is generally implemented according to a plan, corresponding maintenance work is carried out on site by a relay protection maintenance worker so as to ensure that the protection function, the protection constant value and the secondary circuit of the line protection device are all correct.
The traditional power failure maintenance needs maintainers to work on site, and is contradictory to the idea of reducing manpower configuration of an unattended substation. In addition, when the maintenance personnel work on site, the power of the line needs to be cut off firstly, a large number of safety measures are taken to ensure personal safety, and the transmission efficiency is low.
Disclosure of Invention
The invention aims to provide a remote uninterrupted transmission checking method suitable for a line protection device aiming at the trend of protection localization and transformer substation unmanned, and the method for realizing uninterrupted transmission on a transformer substation operation line in a remote communication mode improves the personal safety factor of maintainers, reduces the workload of line protection device scheduled inspection and circuit breaker transmission, avoids repeated maintenance work, and solves the contradiction between the huge number of relay protection devices and the shortage of the maintainers.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for remotely checking line protection without power outage comprises the following steps:
step 1: the line protection device collects information of a line running state and a working state of the device;
step 2: the circuit protection device acquires the reclosing switch input state and the reclosing switch charging state of the circuit protection device;
and step 3: the line protection device establishes an association relation with a remote non-stop transmission command by combining system running state information, self working state information of the device, reclosing charge state information, the position of a remote operation hard pressure plate and the position information of a remote non-stop transmission soft pressure plate; the association relationship comprises: the association relationship of the remote uninterrupted power transmission enabling command and the association relationship of the remote uninterrupted power transmission outlet command;
And 4, step 4: the method comprises the following steps that operators in a transformer substation issue remote uninterrupted transmission enabling remote control commands through backstage or scheduling operators by remote control, and a circuit protection device judges whether the current state allows remote uninterrupted transmission enabling according to whether the incidence relation of the remote uninterrupted transmission enabling commands is matched with the current state; if the line protection device is matched with the line protection device, the line protection device enters a remote non-power-off transmission enabling state, and remote non-power-off transmission operation permission is opened;
and 5, in the time allowed by the uninterrupted transmission enable of the line protection device, the operator issues a remote uninterrupted transmission outlet command, the line protection device judges whether the current state allows the remote uninterrupted transmission outlet according to whether the incidence relation of the remote uninterrupted transmission outlet command is matched with the current state, and if the incidence relation is matched with the current state, the line protection device automatically starts the reclosing to restore the line operation after the outlet of the line protection device trips.
Furthermore, the line to be checked does not need to be overhauled in a power failure mode, but is in a normal power supply running state, and the line protection device is also in a normal working state.
Furthermore, the remote uninterrupted power transmission command comprises a remote uninterrupted power transmission enabling command and a remote uninterrupted power transmission outlet command, and before the remote uninterrupted power transmission outlet command is executed, the device is enabled through the remote uninterrupted power transmission enabling command.
Further, the association relationship of the uninterruptible power transmission enabling command comprises:
1) the protection element of the line protection device is not in a starting or action state;
2) no abnormal alarm is given to the line protection device;
3) the reclosing function of the line protection device is put into operation and is in a charging completed state;
4) the circuit protection device remotely operates the hard pressing plate to be in a putting-in state;
5) the remote non-power-off transmission soft pressing plate of the line protection device is in a switching state;
6) receiving a remote control enabling command from a remote place through uninterrupted power transmission;
if the above conditions are met, the line protection device meets the remote uninterrupted transmission enabling opening condition.
Further, the association relationship of the remote non-stop electric transmission exit command comprises:
1) the line protection device is in a remote uninterrupted transmission enabling state;
2) the protection element of the line protection device is not in a starting or action state;
3) no abnormal alarm is given to the line protection device;
4) the reclosing function of the line protection device is put into operation and is in a charging completed state;
5) the circuit protection device remotely operates the hard pressing plate to be in a putting-in state;
6) the remote non-power-off transmission soft pressing plate of the line protection device is in a switching state;
7) Receiving a remote control command of a non-power-off transmission outlet from a remote place;
if the above conditions are met, the line protection device meets the remote non-stop transmission exit condition.
Further, after the circuit protection device enters a non-power-off transmission enabling state, the state is kept within a preset time; and when the holding time is up, the line protection device automatically exits the uninterrupted transmission enabling state.
Further, during the uninterrupted transmission enabling period, the line protection device judges that the association relation of the remote uninterrupted transmission outlet command is not matched with the current state, and the uninterrupted transmission enabling state is returned.
Further, the state information and the transmission result of the line protection device are uploaded to a monitoring background or dispatching through a station control layer MMS.
After the scheme is adopted, the beneficial effects achieved by the invention are as follows:
1. the line to be checked does not need to be overhauled in a power failure mode, but is in a normal power supply running state, and the line protection device is also in a normal working state, so that the power failure time and times of equipment are reduced, and the running stability and reliability of a power grid are improved.
2. Need not the maintainer to arrive the scene, but through the in-station control backstage or dispatch, give the device in the mode of communication and assign the transmission operating command that does not have a power failure, can realize carrying out the check-up to line protection equipment and secondary circuit in the transformer substation, both high-efficient reasonable completion the overhaul of equipment work target, the waste of on-the-spot maintenance work to manpower, material resources, financial resources and time has been reduced again, the automation level of transformer substation operation and maintenance has been improved, reduce the risk of artifical maloperation, the personal safety of operation and maintenance personnel has been ensured, the reliability of protection equipment and secondary circuit has been improved.
Drawings
FIG. 1 is a schematic diagram of a dispatch and substation communications network architecture;
FIG. 2 is a flow chart of a remote uninterruptible transmission exit command;
FIG. 3 is a flow diagram of a remote non-stop transmission enable command.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
The remote uninterrupted transmission of the line protection means that under the condition that the line is not powered off, an uninterrupted transmission command from a scheduling or in-station monitoring background is executed for verifying the correctness of a relay protection tripping and closing loop of the line, and the circuit protection reclosing function is utilized for automatically reclosing and recovering power supply after the circuit breaker trips.
The invention discloses a remote uninterrupted transmission checking method suitable for a line protection device, which comprises the following steps of:
step 1: the line protection device collects information of a line running state and a working state of the device;
step 2: the circuit protection device acquires the reclosing switch input state and the reclosing switch charging state of the circuit protection device;
and step 3: the line protection device establishes an association relation with a remote non-stop transmission command by combining system running state information, self working state information of the device, reclosing charge state information, the position of a remote operation hard pressure plate and the position information of a remote non-stop transmission soft pressure plate; the association relationship comprises: the association relationship of the remote uninterrupted power transmission enabling command and the association relationship of the remote uninterrupted power transmission outlet command;
And 4, step 4: the method comprises the following steps that operators in a transformer substation issue remote uninterrupted transmission enabling remote control commands through backstage or scheduling operators by remote control, and a circuit protection device judges whether the current state allows remote uninterrupted transmission enabling according to whether the incidence relation of the remote uninterrupted transmission enabling commands is matched with the current state; if the line protection device is matched with the line protection device, the line protection device enters a remote non-power-off transmission enabling state, and remote non-power-off transmission operation permission is opened;
and 5, in the time allowed by the uninterrupted transmission enable of the line protection device, the operator issues a remote uninterrupted transmission outlet command, the line protection device judges whether the current state allows the remote uninterrupted transmission outlet according to whether the incidence relation of the remote uninterrupted transmission outlet command is matched with the current state, and if the incidence relation is matched with the current state, the line protection device automatically starts the reclosing to restore the line operation after the outlet of the line protection device trips.
Fig. 1 is a schematic diagram of a communication network architecture of a dispatching and transformer substation, and in-station operators communicate through a monitoring background and line protection to perform remote transmission operation without power failure.
The dispatching and the line protection are communicated through the telecontrol device, so that the dispatching instruction is issued and the information of the line protection device is uploaded.
In order to avoid that an operator triggers remote uninterrupted transmission by mistake, a remote uninterrupted transmission command is divided into a remote uninterrupted transmission enabling command and a remote uninterrupted transmission outlet command, and before the remote uninterrupted transmission outlet command is executed, the command needs to be issued first to enable the circuit protection device to be in a remote uninterrupted transmission enabling state.
The remote uninterrupted power transmission enabling command and the remote uninterrupted power transmission outlet command are set in a remote control mode, and a direct control mode is adopted.
In a preferred scheme, the association relation of the uninterrupted transmission enabling command comprises the following steps:
1) the protection element of the line protection device is not in a starting or action state;
2) no abnormal alarm is given to the line protection device; such as CT disconnection, PT disconnection, control loop disconnection, channel alarm, etc.;
3) the reclosing function of the line protection device is put into operation and is in a charging completed state;
4) the circuit protection device remotely operates the hard pressing plate to be in a putting-in state;
5) the remote non-power-off transmission soft pressing plate of the line protection device is in a switching state;
6) receiving a remote control enabling command from a remote place through uninterrupted power transmission;
FIG. 3 is a logic diagram of a remote uninterruptible power transmission enable command. When the conditions are met, a remote uninterrupted transmission enabling command issued by an operator can pass the verification of the device, the line protection device of the interval to be transmitted is placed in an uninterrupted transmission enabling state, and an uninterrupted transmission enabling state signal can be uploaded to an in-station monitoring background or a telemechanical device to be uploaded to a dispatching.
Once the line protection device enters the uninterrupted transmission enabling state, the state can be automatically maintained for a certain time, and the maintaining time can be solidified from the inside of the line protection device or set through parameters. When the uninterrupted transmission enabling time is reached, the line protection device can automatically quit the uninterrupted transmission enabling time.
If the line protection device does not satisfy the condition of the uninterrupted power transmission during the uninterrupted power transmission enabling period, the uninterrupted power transmission enabling state is returned.
During the period of enabling the remote uninterrupted transmission of the line protection device, a remote uninterrupted transmission exit command from a background or a schedule can be received.
In a preferred scheme, the association relation of the remote non-stop electric transmission exit command comprises:
1) the line protection device is in a remote uninterrupted transmission enabling state;
2) the protection element of the line protection device is not in a starting or action state;
3) no abnormal alarm is given to the line protection device;
4) the reclosing function of the line protection device is put into operation and is in a charging completed state;
5) the circuit protection device remotely operates the hard pressing plate to be in a putting-in state;
6) the remote non-power-off transmission soft pressing plate of the line protection device is in a switching state;
7) Receiving a remote control command of a non-power-off transmission outlet from a remote place;
FIG. 2 is a flow chart of the remote uninterruptible power transmission exit command; when the conditions are met, the line protection device can execute a remote uninterrupted transmission outlet command, send a tripping command, trip off the circuit breaker, start an automatic reclosing function, and send a closing command to close the circuit breaker after a reclosing delay fixed value.
After the uninterrupted transmission outlet, the remote uninterrupted transmission enabling state can automatically return.
The line protection device can judge whether remote uninterrupted transmission operation succeeds or not according to the switch position information and feed back the information to a background or a dispatching, and therefore verification of tripping and closing loops of the line interval protection device is completed.
During the whole uninterrupted transmission period, the normal operation of other protection logics on the line protection device is not influenced, and the line protection device can correctly act when a system fails.
The state information and the transmission result of the line protection device can be uploaded to a monitoring background or scheduled through a station control layer MMS.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (8)
1. A remote uninterrupted transmission verification method suitable for a line protection device is characterized by comprising the following steps:
step 1: the line protection device collects information of a line running state and a working state of the device;
step 2: the circuit protection device acquires the reclosing switch input state and the reclosing switch charging state of the circuit protection device;
and step 3: the line protection device establishes an association relation with a remote non-stop transmission command by combining system running state information, self working state information of the device, reclosing charge state information, the position of a remote operation hard pressure plate and the position information of a remote non-stop transmission soft pressure plate; the association relationship comprises: the association relationship of the remote uninterrupted power transmission enabling command and the association relationship of the remote uninterrupted power transmission outlet command;
and 4, step 4: the method comprises the following steps that operators in a transformer substation issue remote uninterrupted transmission enabling remote control commands through backstage or scheduling operators by remote control, and a circuit protection device judges whether the current state allows remote uninterrupted transmission enabling according to whether the incidence relation of the remote uninterrupted transmission enabling commands is matched with the current state; if the line protection device is matched with the line protection device, the line protection device enters a remote non-power-off transmission enabling state, and remote non-power-off transmission operation permission is opened;
And 5, in the time allowed by the uninterrupted transmission enable of the line protection device, the operator issues a remote uninterrupted transmission outlet command, the line protection device judges whether the current state allows the remote uninterrupted transmission outlet according to whether the incidence relation of the remote uninterrupted transmission outlet command is matched with the current state, and if the incidence relation is matched with the current state, the line protection device automatically starts the reclosing to restore the line operation after the outlet of the line protection device trips.
2. The method according to claim 1, wherein the line to be verified is not required to be maintained in a power outage state, but is in a normal power supply operation state, and the line protection device is in a normal working state.
3. The method of claim 1, wherein the remote uninterruptible power transmission command includes a remote uninterruptible power transmission enable command and a remote uninterruptible power transmission exit command, and the remote uninterruptible power transmission enable command is used to enable the device prior to executing the remote uninterruptible power transmission exit command.
4. The remote uninterruptible power transmission verification method for line protection devices as claimed in claim 1, wherein the association relationship of the uninterruptible power transmission enabling command includes:
1) The protection element of the line protection device is not in a starting or action state;
2) no abnormal alarm is given to the line protection device;
3) the reclosing function of the line protection device is put into operation and is in a charging completed state;
4) the circuit protection device remotely operates the hard pressing plate to be in a putting-in state;
5) the remote non-power-off transmission soft pressing plate of the line protection device is in a switching state;
6) receiving a remote control enabling command from a remote place through uninterrupted power transmission;
if the above conditions are met, the line protection device meets the remote uninterrupted transmission enabling opening condition.
5. The remote uninterruptible power transmission verification method for line protection devices as claimed in claim 1, wherein the remote uninterruptible power transmission exit command association relationship includes:
1) the line protection device is in a remote uninterrupted transmission enabling state;
2) the protection element of the line protection device is not in a starting or action state;
3) no abnormal alarm is given to the line protection device;
4) the reclosing function of the line protection device is put into operation and is in a charging completed state;
5) the circuit protection device remotely operates the hard pressing plate to be in a putting-in state;
6) the remote non-power-off transmission soft pressing plate of the line protection device is in a switching state;
7) Receiving a remote control command of a non-power-off transmission outlet from a remote place;
if the above conditions are met, the line protection device meets the remote non-stop transmission exit condition.
6. The remote uninterruptible power transmission verification method for the line protection device as claimed in claim 1, wherein the line protection device is maintained in the uninterruptible power transmission enabled state for a predetermined time after entering the state; and when the holding time is up, the line protection device automatically exits the uninterrupted transmission enabling state.
7. The method of claim 6, wherein during the enabling of the uninterruptible power transmission, the uninterruptible power transmission enabled status is returned if the line protection device determines that the association relationship of the remote uninterruptible power transmission exit command does not match the current status.
8. The method as claimed in claim 1, wherein the status information and transmission results of the line protection device are uploaded to a monitoring background or dispatch via a station control layer MMS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910341499.5A CN111864894A (en) | 2019-04-26 | 2019-04-26 | Remote uninterrupted power transmission calibration method suitable for line protection device |
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| CN201910341499.5A CN111864894A (en) | 2019-04-26 | 2019-04-26 | Remote uninterrupted power transmission calibration method suitable for line protection device |
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| CN201910341499.5A Pending CN111864894A (en) | 2019-04-26 | 2019-04-26 | Remote uninterrupted power transmission calibration method suitable for line protection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114002530A (en) * | 2021-10-29 | 2022-02-01 | 广东电网有限责任公司 | Remote non-power-off scheduled inspection method and system for line protection device |
| CN114002552A (en) * | 2021-10-29 | 2022-02-01 | 广东电网有限责任公司 | Line protection remote non-power-off scheduled inspection method and system based on intelligent oscillograph |
| CN114879031A (en) * | 2022-07-11 | 2022-08-09 | 广东电网有限责任公司佛山供电局 | Method and related device for verifying remote control function of distribution network automatic switch in real time |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114002552A (en) * | 2021-10-29 | 2022-02-01 | 广东电网有限责任公司 | Line protection remote non-power-off scheduled inspection method and system based on intelligent oscillograph |
| CN114879031A (en) * | 2022-07-11 | 2022-08-09 | 广东电网有限责任公司佛山供电局 | Method and related device for verifying remote control function of distribution network automatic switch in real time |
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Application publication date: 20201030 |
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