CN110571935A - Remote locking method for station spare power automatic switching device - Google Patents
Remote locking method for station spare power automatic switching device Download PDFInfo
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- CN110571935A CN110571935A CN201910918662.XA CN201910918662A CN110571935A CN 110571935 A CN110571935 A CN 110571935A CN 201910918662 A CN201910918662 A CN 201910918662A CN 110571935 A CN110571935 A CN 110571935A
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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Abstract
The invention discloses a remote locking method of a station spare power automatic switching device, which comprises the steps of accessing an action signal of a transformer substation stability control device into a transformer substation comprehensive automation background system; the transformer substation integrated automation background system acquires a transformer substation stability control device action signal and uploads the action signal to the scheduling master station EMS system in a remote signaling signal form in real time; after the scheduling master station EMS system obtains the signal, generating a locking control instruction according to the locking strategy of the station spare power automatic switching device and calling a remote control interface to realize batch issuing of the locking control instruction; and the target station receives the locking control instruction and locks the spare power automatic switching device of the self station. The invention realizes the real-time monitoring, acquisition and uploading of action signals of the transformer substation stability control device and the remote locking and monitoring of the station spare power automatic switching device, does not need to improve the existing power grid hardware system, has low cost, realizes the stable, reliable and rapid transmission of the signals through the existing power grid hardware and software system, and has stable, reliable and safe signal transmission.
Description
Technical Field
the invention particularly relates to a remote locking method of a station spare power automatic switching device.
Background
With the continuous promotion of extra-high voltage alternating current and direct current construction, long-distance high-power transmission becomes possible. Due to the influences of factors such as relatively weak grid structure in the initial stage of construction of the extra-high voltage power grid, lag in construction of a matched power supply, constraint bottleneck of safety and stability of the power grid and the like, the extra-high voltage direct current blocking fault causes large-range power flow transfer and has a great influence on the receiving-end power grid. In order to ensure the overall safety and stability of a receiving-end power grid and the transmission efficiency of extra-high voltage direct current, a large-scale stable control load shedding system needs to be constructed in a synchronous matched mode at the periphery. The automatic backup power switching device can obviously improve the power supply reliability as a common safety automatic device of a power grid, can automatically and quickly switch to another power supply to supply power when one power supply fails, and is widely applied to the power grid. Because the load requirements of the stability control system must be strictly implemented, the spare power automatic switching device of the switched station must be locked or withdrawn for achieving the purpose.
The conventional automatic backup power switching device does not have the function of receiving a remote locking instruction, so that the automatic backup power switching device of the switched load substation needs to be exited or a certain transformation needs to be carried out on the automatic backup power switching device after stable control input. The improvement of the spare power automatic switching device is realized by increasing local criteria or by regional spare power automatic switching: the local criterion is usually a bus voltage criterion or a reclosing detection opening criterion, so that the action of the spare power automatic switching device after the load of a terminal station is cut off by the action of a stability control system is avoided, and the method is only suitable for specific occasions. The regional spare power automatic switching device is locked, a regional control center is adopted to send a pause or locking command to control the action of the station spare power automatic switching device, so that a main and auxiliary control mode of the regional spare power automatic switching device and the station spare power automatic switching device is realized, other protection or safety automatic devices in a power grid are often involved in transformation, a special channel needs to be added, the transformation is complex, and the large-scale popularization is difficult. The wide-area automatic bus transfer control system based on the EMS system establishes a wide-area automatic bus transfer model in a dispatching master station, utilizes EMS real-time telemetering information to realize logic judgment, is limited by real-time data timeliness of a power grid EMS system and an optimal automatic bus transfer strategy and a checking method, and can not solve the remote locking problem of the automatic bus transfer temporarily.
Disclosure of Invention
the invention aims to provide a remote locking method of a station spare power automatic switching device, which is stable, reliable, safe and low in cost in signal transmission.
The remote locking method of the spare power automatic switching device at the site provided by the invention comprises the following steps:
s1, connecting an action signal of a transformer substation stability control device into a transformer substation comprehensive automation background system;
s2, when the transformer substation stability control device acts, the transformer substation integrated automation background system acquires an action signal of the transformer substation stability control device, and uploads the acquired action signal of the transformer substation stability control device to a scheduling master station EMS system in a remote signaling signal form in real time through transformer substation telecontrol communication equipment and an existing communication network from the transformer substation to the scheduling master station;
S3, after the scheduling master station EMS system acquires the uploaded action signals of the stable control devices of the transformer substation, generating locking control instructions of corresponding station spare power automatic switching devices according to the existing station spare power automatic switching device locking strategies, and calling a remote control interface of the EMS system to realize batch issuing of the locking control instructions;
and S4, after the target station receives a locking control instruction of the station spare power automatic switching device issued by the scheduling master station EMS system, locking the station spare power automatic switching device.
The existing station backup automatic switching device locking strategy in step S3 is to form a fixed mapping relationship between an action signal of a substation stability control device and a corresponding station backup automatic switching device to be locked in the form of a control strategy table, and store the mapping relationship in an EMS system of a scheduling master station.
The step S3 includes generating a locking control instruction of the corresponding station backup automatic switching device according to an existing station backup automatic switching device locking strategy after the scheduling master station EMS system acquires the uploaded action signal of the substation backup automatic switching device, and calling a remote control interface of the EMS system to implement batch issuing of the locking control instruction, specifically, after the scheduling master station EMS system acquires the uploaded action signal of the substation backup automatic switching device, querying the action signal of the substation backup automatic switching device stored in the scheduling master station EMS system and a control strategy table of the corresponding station backup automatic switching device to be locked, thereby generating a locking control instruction of the corresponding station backup automatic switching device, and calling the remote control interface of the EMS system to implement batch issuing of the locking control instruction.
And step S4, locking the station backup power automatic switching device, specifically, changing a function soft pressure plate of the backup power automatic switching device from being withdrawn or a function hard pressure plate from being withdrawn, and limiting the backup power automatic switching device to be started, so as to lock the backup power automatic switching device of the station, and feeding back the function locking or discharging condition of the backup power automatic switching device to the scheduling master station EMS system in the form of a remote signaling signal.
The locking of the station backup power automatic switching device of the self in step S4 specifically adopts the following strategy to lock:
If the transformer substation is an intelligent transformer substation, remote control processing is carried out on a telemechanical system and a master station EMS system by utilizing the existing functional soft pressing plate of the automatic bus transfer device based on an IEC61850 communication protocol, so that remote control pressing plate switching on and off of dispatching is realized;
If the transformer substation is a conventional transformer substation, a functional hard pressing plate of a spare power automatic switching device of the conventional transformer substation is replaced by an electric intelligent pressing plate based on a 103/104 communication protocol, a pressing plate state monitor is additionally arranged, the intelligent pressing plate and a state detector are connected to the opening-in and opening-out contact points of peripheral public measurement and control devices nearby, remote control of dispatching is achieved through the opening-out contact points of the public measurement and control devices, and upward sending of pressing plate state monitoring signals is achieved through the opening-in contact points of the public measurement and control devices; the intelligent pressing plate uploads a state remote signaling signal of the functional pressing plate, the state monitor generates a remote signaling signal of the state of the other pressing plate by monitoring the position of the intelligent pressing plate, remote control position or state monitoring of two different principles is realized, and two different source state detections meeting the requirements of remote control positions are realized.
the remote locking method of the station automatic bus transfer system provided by the invention realizes real-time monitoring, acquisition and uploading of action signals of the transformer substation stable control device and remote locking and monitoring of the station automatic bus transfer system through the existing power grid hardware and software system and the existing locking generation strategy, does not need to improve the existing power grid hardware system, has low cost, realizes stable, reliable and rapid signal transmission through the existing power grid hardware and software system, and has stable, reliable and safe signal transmission.
Drawings
FIG. 1 is a schematic process flow diagram of the process of the present invention.
Detailed Description
FIG. 1 is a schematic flow chart of the method of the present invention: the invention provides a remote locking method of a station spare power automatic switching device of a station spare power automatic switching system, which comprises the following steps:
s1, connecting an action signal of a transformer substation stability control device into a transformer substation comprehensive automation background system;
s2, when the transformer substation stability control device acts, the transformer substation integrated automation background system acquires an action signal of the transformer substation stability control device, and uploads the acquired action signal of the transformer substation stability control device to a scheduling master station EMS system in a remote signaling signal form in real time through transformer substation telecontrol communication equipment and an existing communication network from the transformer substation to the scheduling master station;
s3, after the scheduling master station EMS system acquires the uploaded action signals of the stable control devices of the transformer substation, generating locking control instructions of corresponding station spare power automatic switching devices according to the existing station spare power automatic switching device locking strategies, and calling a remote control interface of the EMS system to realize batch issuing of the locking control instructions; after the dispatching master station EMS system acquires the uploaded action signal of the substation steady control device, inquiring the action signal of the substation steady control device stored in the dispatching master station EMS system and a control strategy table of a corresponding station spare power automatic switching device to be locked, thereby generating a locking control instruction of the corresponding station spare power automatic switching device and calling a remote control interface of the EMS system to realize batch issuing of the locking control instruction;
The existing station backup power automatic switching device locking strategy specifically comprises the steps that a fixed mapping relation is formed by action signals of a transformer substation stability control device and corresponding station backup power automatic switching devices needing to be locked in a control strategy table mode, and the mapping relation is stored in an EMS system of a dispatching master station;
the control strategy table is a strategy set which is updated by rolling check periodically based on the main station power grid information and has the following characteristics: (1) the addition or expansion of the spare power automatic switching locking station is simpler, and only a 220kV stable control substation and a corresponding 110kV load-shedding terminal station logic corresponding relation need to be added to the master station control strategy table according to a corresponding rule; (2) whether the backup power automatic switching of the terminal station participates in locking control or not is comprehensively judged based on two aspects of information: firstly, only locking the station which is still powered by the related 220kV transformer substation after the spare power automatic switching device acts based on the active identification technology of the power supply of the transformer substation; whether identification boards such as power-on lines, primary important users and the like exist on the outgoing lines of the distribution network of the relevant sites or not is detected, whether a dispatcher participates in control or not is reminded before the important identification boards are locked, and the dispatcher is reminded of performing treatment preferentially after the locking; (3) locking site sequencing is carried out based on the sensitivity of the stable control point and the load shedding site, and the spare power automatic switching of related sites is locked in batches according to the minimum over-cut principle under the condition of ensuring the load shedding amount, so that the problem of 'one-time switching' of the original spare power automatic switching locking control is avoided (the sensitivity calculation of the stable control point and the load shedding site is based on the sensitivity regular calculation result of the energy management system of the dispatching master station);
s4, after the target station receives a locking control instruction of the station spare power automatic switching device issued by the scheduling master station EMS system, locking the station spare power automatic switching device; specifically, the method comprises the steps of quitting a function soft pressing plate of the spare power automatic switching device or changing a function hard pressing plate from being thrown into the state of quitting, limiting the starting of the spare power automatic switching device, locking the spare power automatic switching device of the station, and feeding back the locking or discharging condition of the function of the spare power automatic switching device to an EMS system of a dispatching master station in the form of a remote signaling signal;
In specific implementation, the following strategy is specifically adopted for locking:
If the transformer substation is an intelligent transformer substation, remote control processing is carried out on a telemechanical system and a master station EMS system by utilizing the existing functional soft pressing plate of the automatic bus transfer device based on an IEC61850 communication protocol, so that remote control pressing plate switching on and off of dispatching is realized;
If the transformer substation is a conventional transformer substation, a functional hard pressing plate of a spare power automatic switching device of the conventional transformer substation is replaced by an electric intelligent pressing plate based on a 103/104 communication protocol, a pressing plate state monitor is additionally arranged, the intelligent pressing plate and a state detector are connected into an open-close contact of a peripheral common measurement and control device, remote control of dispatching is realized through the open-close contact of the common measurement and control device, and an up-sending of a pressing plate state monitoring signal is realized through the open-close contact of the common measurement and control device; the intelligent pressing plate uploads a state remote signaling signal of the functional pressing plate, the state monitor generates a remote signaling signal of the state of the other pressing plate by monitoring the position of the intelligent pressing plate, remote control position or state monitoring of two different principles is realized, and two different source state detections meeting the requirements of remote control positions are realized.
the method of the invention fully utilizes the existing substation telecontrol equipment and communication network, is simple to reform, does not need to increase additional channels, and realizes fast and reliable full-closed-loop control by utilizing the functional reliability of the master station EMS system and the rapidity of local control of the spare power automatic switching device.
1) compared with a conventional locking scheme, the invention fully utilizes the stable communication channel and the mature signal transmission mode of the scheduling master station EMS system and the transformer substation stability control device, and the scheduling master station and the load shedding terminal transformer substation. The stability control device sends action signals to the scheduling master station EMS system through the existing telecontrol communication equipment and the communication network, and the scheduling master station sends control instructions to the corresponding load shedding terminal transformer substation through the communication network after making decisions.
2) The master station spare power automatic switching logic locking function that this patent provided realizes that stable control device action signal triggers, seeks appointed control strategy, generates corresponding spare power automatic switching function clamp plate remote control locking instruction fast, and the function possesses powerful transformer substation expansibility, and a plurality of load shedding terminal substation spare power automatic switching devices of access that can be faster utilize the crowd control function to realize many stations and lock control in batches. Compared with the previous minute-level standby power automatic switching optimization control function based on the master station EMS, the standby power automatic switching optimization control method has obvious improvement and can realize second-level control under emergency conditions.
3) The method for locking the spare power automatic switching function soft pressing plate or changing the function hard pressing plate from being put into the standby state to be withdrawn is adopted, the mature remote control interface and the group control function of the existing master station EMS system are utilized, the batch withdrawal control of the spare power automatic switching function pressing plate is realized, and the reliability and the rapidity of the final control are fully ensured.
Claims (5)
1. A remote locking method of a station spare power automatic switching device comprises the following steps:
s1, connecting an action signal of a transformer substation stability control device into a transformer substation comprehensive automation background system;
s2, when the transformer substation stability control device acts, the transformer substation integrated automation background system acquires an action signal of the transformer substation stability control device, and uploads the acquired action signal of the transformer substation stability control device to a scheduling master station EMS system in a remote signaling signal form in real time through transformer substation telecontrol communication equipment and an existing communication network from the transformer substation to the scheduling master station;
s3, after the scheduling master station EMS system acquires the uploaded action signals of the stable control devices of the transformer substation, generating locking control instructions of corresponding station spare power automatic switching devices according to the existing station spare power automatic switching device locking strategies, and calling a remote control interface of the EMS system to realize batch issuing of the locking control instructions;
And S4, after the target station receives a locking control instruction of the station spare power automatic switching device issued by the scheduling master station EMS system, locking the station spare power automatic switching device.
2. The remote locking method for the site automatic backup power switching device according to claim 1, wherein the existing site automatic backup power switching device locking strategy in step S3 is specifically that a fixed mapping relationship is formed between an action signal of a substation stability control device and a corresponding site automatic backup power switching device to be locked in a form of a control strategy table, and the mapping relationship is stored in an EMS system of a dispatching master station.
3. the remote locking method for the site automatic backup power switching device according to claim 2, wherein the scheduling master station EMS system in step S3 generates a locking control command for the corresponding site automatic backup power switching device according to an existing locking strategy for the site automatic backup power switching device after acquiring the uploaded action signal for the substation automatic backup power switching device, and calls a remote control interface of the EMS system to implement batch issuing of the locking control command, and specifically, after the scheduling master station EMS system acquires the uploaded action signal for the substation automatic backup power switching device, queries the action signal for the substation automatic backup power switching device stored in the scheduling master station EMS system and a control strategy table for the site automatic backup power switching device to be locked, so as to generate a locking control command for the corresponding site automatic backup power switching device, and calls the remote control interface of the EMS system to implement batch issuing of the locking control command.
4. The remote locking method for the station automatic backup power switching device according to any one of claims 1 to 3, wherein the locking of the station automatic backup power switching device is performed in step S4, specifically, the backup power switching device is locked by limiting the start of the automatic backup power switching device when the functional soft pressing plate of the automatic backup power switching device is withdrawn or the functional hard pressing plate is changed from being put into use to be withdrawn, and the locking or discharging condition of the automatic backup power switching device is fed back to the EMS system of the dispatching master station in the form of a remote signaling signal.
5. The remote locking method for the station automatic backup power switching device according to claim 4, wherein the locking of the station automatic backup power switching device in step S4 is implemented by adopting the following strategies:
if the transformer substation is an intelligent transformer substation, remote control processing is carried out on a telemechanical system and a master station EMS system by utilizing the existing functional soft pressing plate of the automatic bus transfer device based on an IEC61850 communication protocol, so that remote control pressing plate switching on and off of dispatching is realized;
If the transformer substation is a conventional transformer substation, a functional hard pressing plate of a spare power automatic switching device of the conventional transformer substation is replaced by an electric intelligent pressing plate based on a 103/104 communication protocol, a pressing plate state monitor is additionally arranged, the intelligent pressing plate and a state detector are connected into an open-close contact of a peripheral common measurement and control device, remote control of dispatching is realized through the open-close contact of the common measurement and control device, and an up-sending of a pressing plate state monitoring signal is realized through the open-close contact of the common measurement and control device; the intelligent pressing plate uploads a state remote signaling signal of the functional pressing plate, the state monitor generates a remote signaling signal of the state of the other pressing plate by monitoring the position of the intelligent pressing plate, remote control position or state monitoring of two different principles is realized, and two different source state detections meeting the requirements of remote control positions are realized.
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2019
- 2019-09-26 CN CN201910918662.XA patent/CN110571935B/en active Active
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| CN101673965A (en) * | 2009-10-14 | 2010-03-17 | 华南理工大学 | Automatic switching control method for wide-area emergency power source of electric power system |
| CN104617674A (en) * | 2015-02-13 | 2015-05-13 | 国家电网公司 | Method for remotely operating recloser soft pressing plate |
| CN107222020A (en) * | 2017-06-20 | 2017-09-29 | 国家电网公司 | A kind of stability control equipment and backup auto-activating device interlocking control method, apparatus and system |
| CN110072024A (en) * | 2019-05-28 | 2019-07-30 | 广东电网有限责任公司 | A kind of Dual module modem apparatus and the control system with it |
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| 吴乾江 等: "关于10kV分段备自投合流闭锁功能", 《电网技术》 * |
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