CN110518699B - Out-of-step separation control system based on wide area information - Google Patents
Out-of-step separation control system based on wide area information Download PDFInfo
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- CN110518699B CN110518699B CN201910788851.XA CN201910788851A CN110518699B CN 110518699 B CN110518699 B CN 110518699B CN 201910788851 A CN201910788851 A CN 201910788851A CN 110518699 B CN110518699 B CN 110518699B
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- 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
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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
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- 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 application discloses a step-out disconnection control system based on wide area information, which comprises a main station and a plurality of substations, wherein the main station is connected with the substations; the master station stores a network topology structure and a preset section of a current power system, and the section is composed of a plurality of power transmission channels composed of multiple communication lines; the substation is arranged in the substation with the section and comprises a first substation device and a second substation device, and the first substation device and the second substation device of the same substation are connected to the same power transmission channel; the first substation device is in communication connection with the second substation device and the main station; the first sub-station device and the second sub-station device are used for generating out-of-step information and sending the out-of-step information to the main station when the power transmission channel sends out-of-step; and the master station is used for controlling each substation to split the section when receiving the out-of-step information sent by the at least two first substation devices and the at least two second substation devices. Compared with the prior art, the method and the device can shorten the splitting time after the power system is out of step, prevent the misclassification of the sections of the multiple connection lines, and ensure the splitting efficiency, thereby ensuring the reliability of the power system.
Description
Technical Field
The application relates to the technical field of power system control, in particular to an out-of-step separation control system based on wide area information.
Background
At present, the out-of-step disconnection devices configured in power systems at home and abroad are divided into two types, one is an out-of-step disconnection device for judging based on local information, and the other is an out-of-step disconnection device based on wide area information.
The out-of-step disconnection device for judging based on the local information judges the out-of-step of the power system by utilizing the local information so as to make corresponding disconnection measures, namely, decentralized control based on the local information, and no information exchange exists among stations. However, such out-of-step disconnecting device usually operates after 2-3 oscillation cycles after the power system is out of step. When the out-of-step oscillation section is composed of a plurality of power transmission channels, the judgment time of each channel is inconsistent, the final splitting time of the section is determined by the splitting time of the power transmission channel which is split at the latest, the oscillation characteristics of some channels of the same section are not obvious under partial faults, and the in-situ out-of-step splitting device is difficult to act, so that the actual action effect is possibly that a large number of units trip or load loss exists before the action, the stable recovery capability of the system after the splitting is greatly influenced, and in serious cases, the partial out-of-step splitting devices can be split later or even are difficult to split, so that the power system cannot recover stably, and the loss is increased.
To avoid the above problem, an out-of-step disconnection apparatus based on wide area information is generally adopted to solve the out-of-step problem of the power system. However, after the wide-area step-out disconnecting device applied to the cross section of the multi-connection line acts, all lines of the cross section of the system are disconnected, and the power grid is disconnected into a plurality of systems, so that the loss caused by misoperation of the wide-area step-out disconnecting device relative to the local disconnecting device is much larger, and if misoperation occurs, disastrous results are brought.
Therefore, in the prior art, the wide area out-of-step splitting device is prevented from generating false operation through two modes, wherein the first mode is to judge out-of-step by judging the voltage angle difference at two ends of the regional inter-grid connecting line and combining the power transmission variable quantity on the regional inter-grid connecting line, and the second mode is to judge out-of-step of the line by utilizing a remote criterion and combining a local criterion. However, in the first and second embodiments, it is found that the first embodiment considers only the case where the communication line is a single communication channel, and if the power transmission section including multiple communication lines is out of step, the first embodiment cannot be determined, and therefore the first embodiment cannot be well applied to a power system including multiple communication lines; when the fault section formed by the multiple circuits in the actual power system is out of step, the other circuits except the circuit can not judge out of step, or the fault lasts for too long time when the other circuits except the circuit judge out of step, so that the disconnection in the second mode is not timely, and the power system can cause too large loss when out of step occurs. And because the second mode is not provided with a master station, the adaptability to the grid frame change of the power system is poor, and the scale expansion of the wide-area out-of-step separation system is not facilitated.
Content of application
The technical problem to be solved by the embodiment of the application is to provide an out-of-step splitting control system based on wide area information, prevent the misconnection of multi-connection line sections, and ensure the splitting reliability, thereby ensuring the reliability of an electric power system.
In order to solve the above problem, an embodiment of the present application provides an out-of-step separation control system based on wide area information, including: a master station and a plurality of substations;
the master station stores a network topology structure and a preset section of a current power system, and the section is composed of a plurality of power transmission channels composed of multiple communication lines;
the substation is arranged in the substation with the section and comprises a first substation device and a second substation device, and the first substation device and the second substation device of the same substation are connected to the same power transmission channel;
the first substation device is in communication connection with the second substation device and the master station;
the first substation device and the second substation device judge whether systems on two sides of a connection line are out of step or not by collecting voltage and current information of the connection line in a power transmission channel, when the power transmission channel sends out the out-of-step, relevant information and a judgment result are transmitted to the main station, and the main station confirms whether the section is out of step or not according to the received judgment result and electric quantity information;
and the master station is used for controlling each substation to separate the sections when receiving the out-of-step information sent by at least two first substation devices and at least two second substation devices.
Further, the master station comprises a first master station device, a second master station device and a control device, and the first master station device and the second master station device are connected with the control device; the first master station means and the second master station means are independent of each other.
Furthermore, each first substation device is in communication connection with the first master station device, and each second substation device is in communication connection with the second master station device;
the control device is configured to control each of the first substation devices and each of the second substation devices to split the section when the first master station device receives the out-of-step information sent by at least two of the first substation devices, and the second master station device receives the out-of-step information sent by at least two of the second substation devices.
Further, each of the first substation devices and each of the second substation devices are in communication connection with the first master station device and the second master station device;
the first master station device and the second master station device are both used for receiving the out-of-step information sent by each first slave station device and each second slave station device;
the control device is used for controlling each first substation device and each second substation device to separate the sections when the first master station device and the second master station device both receive the step-out information sent by at least two first substation devices and at least two second substation devices.
Further, the first master station device and the second master station device are in communication connection with the control device.
Further, the communication channels for implementing communication connection of the first substation devices are different, the communication channels for implementing communication connection of the second substation devices are different, and the communication channels for implementing communication connection of the first substation devices and the second substation devices in the same substation are different.
Further, the communication connection is a wireless communication connection.
Further, the first slave station devices are independent of each other, and the second slave station devices are independent of each other.
The embodiment of the application has the following beneficial effects:
the out-of-step separation control system based on the wide area information comprises a main station and a plurality of substations; the master station stores a network topology structure and a preset section of a current power system, and the section is composed of a plurality of power transmission channels composed of multiple communication lines; the substation is arranged in the substation with the section and comprises a first substation device and a second substation device, and the first substation device and the second substation device of the same substation are connected to the same power transmission channel; the first substation device is in communication connection with the second substation device and the main station; the first substation device and the second substation device are used for collecting voltage information and current information of the power transmission channel, judging whether the power transmission channel is out of step or not, and generating out-of-step information and transmitting the out-of-step information to the master station when the power transmission channel transmits the out-of-step; and the master station is used for controlling each substation to split the section when receiving the out-of-step information sent by the at least two first substation devices and the at least two second substation devices. Compared with the prior art, the embodiment can prevent the misconnection of the multi-connection line section, and ensure the reliability of the misconnection, thereby ensuring the reliability of the power system.
Drawings
Fig. 1 is a schematic structural diagram of an out-of-step separation control system based on wide area information according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a wide area information-based out-of-step separation control system according to a second embodiment of the present application;
FIG. 3 is a logic diagram of the wide area out-of-step master station judgment according to the second embodiment;
fig. 4 is a schematic structural diagram of an out-of-step separation control system based on wide area information according to a third embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a schematic structural diagram of a wide area information-based out-of-step disconnection control system according to a first embodiment of the present application is shown, including: a master station 1 and a plurality of substations 2.
The main station 1 stores a network topology structure and a preset section of a current power system, and the section is composed of a plurality of power transmission channels formed by multiple communication lines.
The substation 2 is arranged in a cross-sectional substation, and includes a first substation device 11 and a second substation device 12, and the first substation device 11 and the second substation device 12 of the same substation are connected to the same power transmission path.
The first slave station device 11 is in communication connection with the second slave station device 12 and the master station 1, and the first slave station device 11 and the second slave station device 12 are configured to collect voltage information and current information of the power transmission channel, determine whether the power transmission channel is out of step, generate out-of-step information when the power transmission channel transmits the out-of-step, and transmit the out-of-step information to the master station 1.
The master station 1 is configured to control each slave station to perform disconnection when receiving step-out information transmitted from at least two first slave station devices 11 and at least two second slave station devices 12.
In this embodiment, the first slave station device 11 and the second slave station device 12 collect information of voltage and current of the communication line in the power transmission channel, determine whether the systems on both sides of the communication line are out of step, and transmit the related information and the determination result to the master station 1, and the master station 1 determines whether the cross section is out of step by combining the electrical quantity information according to the received transmission determination result. If the master station 1 receives the step-out information transmitted by the two or more first slave station devices 11 and the step-out information transmitted by the two or more second slave station devices 12, and determines that the section is out of step according to the electrical quantity information, each slave station 2 is made to disconnect all the communication lines on the section and split the section.
In the present embodiment, the first substation device 11 and the second substation device 12 in the same substation 2 are two sets of identical devices, and are independent of each other.
Due to the fact that the main station is arranged, adaptability to grid frame changes of the power system is high, only when the main station receives out-of-step information sent by the plurality of first substation devices and the plurality of second substation devices in the same cross section, and meanwhile, when the cross section is determined to be out of step according to the electrical quantity information, the cross section is split, and therefore the problem of mis-splitting of the cross section of the multi-connection circuit caused by misjudgment and mis-action of the substations is solved, and reliability of the power system is guaranteed. And because the first substation device and the second substation device in the same substation are independent of each other, the out-of-step judgment between the first substation device and the second substation device is also independent, and the mutual interference cannot be caused, namely, when any one substation device in the same substation fails, the other substation device cannot be influenced, and the reliability of the power system is further ensured.
In the present embodiment, the first slave station devices 11 are independent of each other, and the second slave station devices 12 are independent of each other. Each first substation device 11 and the master station 1 realize communication connection through different communication channels, each second substation device 12 and the master station 1 realize communication connection through different communication channels, and the first substation device 11 and the second substation device 12 in the same substation 2 realize communication connection through different communication channels, that is, all the communication channels are independent from each other.
Through independent each first substation device and independent each second substation device for can not cause the interference between arbitrary two substation devices, when arbitrary substation device broke down promptly, can not influence other substation devices, and because all communication channels all are independent each other, make the step-out judgement result that arbitrary one substation device sent to the master station, can not influence the step-out judgement result that other substation devices item master stations sent, thereby reduce the probability of wide area step-out splitting system malfunction because communication problem arouses, the reliability of system has been ensured.
Further, referring to fig. 2, a schematic structural diagram of the wide area information-based out-of-step separation control system according to the second embodiment of the present application is shown.
In this embodiment, the master station 1 includes a first master station apparatus 21, a second master station apparatus 22, and a control apparatus 23, the first master station apparatus 21 and the second master station apparatus 22 are connected to the control apparatus 23, and the first master station apparatus 21 and the second master station apparatus 22 are independent of each other.
The first master station device 21 and the second master station device 22 are in communication connection with a control device 23.
Each first slave station device 11 is communicatively connected to a first master station device 21, and each second slave station device 12 is communicatively connected to a second master station device 22. The first slave station devices 11 are independent of each other, and the second slave station devices 12 are independent of each other. Each first substation device 11 realizes communication connection through different communication channels, each second substation device 12 realizes communication connection with the master station 1 through different communication channels, and the first substation device 11 and the second substation device 12 in the same substation 2 realize communication connection through different communication channels, that is, all the communication channels are independent.
The control device 23 is configured to control the first slave station devices 11 and the second slave station devices 12 to perform disconnection and disconnection when the first master station device 21 receives step-out information transmitted from at least two first slave station devices 11 and the second master station device 22 receives step-out information transmitted from at least two second slave station devices 21.
The specific logic of the present embodiment is shown in fig. 3, where the set of slave stations i-a represents each first slave station device, i is 1,2,3 … n, the set of slave stations i-B represents each second slave station device, the set of master station a represents the first master station device, the set of master station B represents the second master station device, and n ≧ 2 represents that the number of received out-of-step information is at least 2. The first main station device and the second main station device are mutually independent, so that the judgment result received by one main station device cannot influence the other main station device, the probability of misoperation of the wide area out-of-step separation system caused by communication problems or substation misoperation problems is further reduced, and the reliability of the system is further guaranteed.
Further, referring to fig. 4, it is a schematic structural diagram of the out-of-step separation control system based on wide area information according to the third embodiment of the present application.
In this embodiment, the master station 1 includes a first master station apparatus 21, a second master station apparatus 22, and a control apparatus 23, the first master station apparatus 21 and the second master station apparatus 22 are connected to the control apparatus 23, and the first master station apparatus 21 and the second master station apparatus 22 are independent of each other.
The first master station device 21 and the second master station device 22 are in communication connection with a control device 23.
Each first slave station device 11 and each second slave station device 12 are communicatively connected to a first master station device 21 and a second master station device 22. The first slave station devices 11 are independent of each other, and the second slave station devices 12 are independent of each other. Each first substation device 11 realizes communication connection through different communication channels, each second substation device 12 realizes communication connection with the master station 1 through different communication channels, and the first substation device 11 and the second substation device 12 in the same substation 2 realize communication connection through different communication channels, that is, all the communication channels are independent.
The first master station device 21 and the second master station device 22 are each configured to receive the determination results transmitted from each of the first slave station devices 11 and each of the second slave station devices 12.
The control device 23 is configured to control each first substation device 11 and each second substation device 12 to perform disconnection section when the first master station device 21 and the second master station device 22 both receive the step-out information sent by the at least two first substation devices 11 and the at least two second substation devices 12, so as to reduce the probability of wide-area step-out disconnection system malfunction caused by the substation misjudgment malfunction problem, and because each communication channel is independent of each other, the probability of wide-area step-out disconnection system malfunction caused by the communication problem is reduced, and the reliability of the system is ensured.
It should be noted that, the communication connection described in any of the above embodiments may be, but is not limited to, a wireless communication connection.
The foregoing is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.
Claims (8)
1. An out-of-step separation control system based on wide area information, comprising: a master station and a plurality of substations;
the master station stores a network topology structure and a preset section of a current power system, and the section is composed of a plurality of power transmission channels composed of multiple communication lines;
the substation is arranged in the substation with the section and comprises a first substation device and a second substation device, and the first substation device and the second substation device of the same substation are connected to the same power transmission channel;
the first substation device is in communication connection with the second substation device and the master station;
the first substation device and the second substation device judge whether systems on two sides of a connection line are out of step or not by collecting voltage and current information of the connection line in a power transmission channel, when the power transmission channel sends out the out-of-step, relevant information and a judgment result are transmitted to the main station, and the main station confirms whether the section is out of step or not according to the received judgment result and electric quantity information;
and the master station is used for controlling each substation to separate the sections when receiving the out-of-step information sent by at least two first substation devices and at least two second substation devices.
2. The out-of-step and separation control system based on wide area information of claim 1, wherein the master station comprises a first master station device, a second master station device and a control device, and the first master station device and the second master station device are connected with the control device; the first master station apparatus and the second master station apparatus independently judge.
3. The wide area information-based out-of-step split control system of claim 2, wherein each of the first substation devices is communicatively coupled to the first master station device, and each of the second substation devices is communicatively coupled to the second master station device;
the control device is configured to control each of the first substation devices and each of the second substation devices to split the section when the first master station device receives the out-of-step information sent by at least two of the first substation devices, and the second master station device receives the out-of-step information sent by at least two of the second substation devices.
4. The wide area information-based out-of-step split control system of claim 2, wherein each of the first substation devices and each of the second substation devices are communicatively connected to the first master station device and the second master station device;
the first master station device and the second master station device are both used for receiving the out-of-step information sent by each first slave station device and each second slave station device;
the control device is used for controlling each first substation device and each second substation device to separate the sections when the first master station device and the second master station device both receive the step-out information sent by at least two first substation devices and at least two second substation devices.
5. The wide area information based out-of-step separation control system of claim 2, wherein the first master station apparatus and the second master station apparatus are communicatively coupled to the control apparatus.
6. The system according to any one of claims 1, 3, and 4, wherein the communication channels for communication connection of the first substation devices are different, the communication channels for communication connection of the second substation devices are different, and the communication channels for communication connection of the first substation devices and the second substation devices in the same substation are different.
7. The wide area information based out-of-step separation control system according to any one of claims 1, 3 or 4, wherein the communication connection is a wireless communication connection.
8. The wide area information-based out-of-step split control system of any one of claims 1 to 5, wherein each of the first substation devices is independent of each other and each of the second substation devices is independent of each other.
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| CN112398099B (en) * | 2020-10-26 | 2023-05-09 | 中国南方电网有限责任公司超高压输电公司梧州局 | Hierarchical wide area system and device based on low-delay wireless communication |
| CN114422408B (en) * | 2021-12-16 | 2023-12-22 | 深圳供电局有限公司 | Substation monitoring method, device, computer equipment and storage medium |
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| CN102916407A (en) * | 2012-08-23 | 2013-02-06 | 山西省电力公司大同供电分公司 | Relay protection and fault information management system for regional power grid |
| CN203166515U (en) * | 2013-03-29 | 2013-08-28 | 国家电网公司 | Large-scale regional inter-power-grid splitting control system |
| CN103248047B (en) * | 2013-05-15 | 2015-10-28 | 国家电网公司 | A kind of electrical network wide area control system |
| CN104078946B (en) * | 2013-10-30 | 2015-08-05 | 中国南方电网有限责任公司 | A kind of wide area distance protecting method towards transformer station |
| CN105576832A (en) * | 2016-01-12 | 2016-05-11 | 国网安徽省电力公司宿州供电公司 | Sub-station simulation and transmission system and method of substation automation system |
| CN106786573A (en) * | 2017-03-30 | 2017-05-31 | 云南电网有限责任公司 | Power network side-by-side cross-section asynchronous oscillation method of discrimination based on multi-measuring point comprehensive criterion |
| CN110112746B (en) * | 2019-06-03 | 2021-07-20 | 中国南方电网有限责任公司 | Splitting control method and device for regional power grid, computer equipment and storage medium |
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