CN114531668A - Maintenance system and method based on wireless communication network - Google Patents
Maintenance system and method based on wireless communication network Download PDFInfo
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- CN114531668A CN114531668A CN202210433566.8A CN202210433566A CN114531668A CN 114531668 A CN114531668 A CN 114531668A CN 202210433566 A CN202210433566 A CN 202210433566A CN 114531668 A CN114531668 A CN 114531668A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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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
- H02J13/00002—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 characterised by monitoring
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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
- H02J13/00006—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
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- Power Engineering (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a maintenance system and a method based on a wireless communication network, wherein the system comprises a GPRS network, a monitoring center server and a monitoring terminal; the GPRS network utilizes a PMU device to collect field data and protect and control the field; transparent data transmission between the monitoring terminal and the monitoring center server is realized through a GPRS network; the system has high performance and high advantage in the aspect of transmission of monitoring information due to the GPRS mobile communication network, and a good foundation is laid for the system due to data transmission, so that the system is guaranteed to have better performance in the aspect of monitoring, and meanwhile, the system still has a good monitoring effect even under severe weather environment.
Description
Technical Field
The invention relates to the field of power wireless communication, in particular to a maintenance system and a maintenance method based on a wireless communication network.
Background
In recent years, the related technology of the power system is developed at a high speed, the construction of the power system with large capacity and high voltage is not a research difficulty, and the guarantee of the safe operation of the power system becomes the key point of the related research at present. Once a sudden fault or temporary power failure occurs in an electric power system, huge economic loss and material influence are brought to life and production, so that a technology capable of realizing remote real-time monitoring of electric power system equipment is urgently needed at present.
Under the long-term sustainable development strategy, the related application of the power system restricts the rapid development of the economy, and the acceleration of optimizing the power system and the improvement of the monitoring capability of the power system equipment are the primary contents of the current research. The power system has numerous distribution transformer nodes, wide geographical coverage range and extremely complex power grid lines, power energy is transmitted to a power transmission line from a power plant through a transformer and is received by each power consumer through a step-down transformer, and a plurality of links in the process need a remote real-time monitoring system to monitor each node of power equipment. If a wired communication mode is used in the process of transmitting the monitoring data, great working pressure is brought to technicians and hardware laying personnel, so that the wireless network technology for the power equipment monitoring system is particularly important.
At present, widely used communication platforms including SDMS communication networks and the like are limited by data transmission modes, and the use requirements cannot be met during system operation. The GPRS wireless communication network based on the packet interaction technology utilizes an IP data network protocol to realize the effects of high-speed transmission and low-speed signaling and can ensure the efficient communication of network data.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention provides a maintenance system and method based on a wireless communication network.
The technical scheme adopted by the invention is that the system comprises a GPRS network, a monitoring center server and a monitoring terminal;
the GPRS network utilizes a PMU device to collect field data and protect and control the field; transparent data transmission between the monitoring terminal and the monitoring center server is realized through a GPRS network; the monitoring center server analyzes the field data and sends a control instruction, the daily work is to maintain a database, a system collects relevant data of field power equipment through a PMU device in a GPRS network, the data are transmitted to a mobile base station and then received by a mobile company server, the Internet provides network support for the mobile company server and transmits the data to the Ethernet of the monitoring center, and the Internet is connected with the Ethernet through a communication server; the monitoring center server receives the power equipment data received by the Ethernet, and the power equipment data are subjected to real-time remote monitoring through cooperation of the decision support server, the GIS system server, the database server and the monitoring workstation.
Furthermore, the wireless transceiver of the GPRS network is a GPRS wireless module, the module connects the monitoring terminal with the GPRS network, after the GPRS network is successfully connected with the GPRS wireless module, the GPRS network is activated by sending a packet data protocol PDP context, IP address allocation is performed through a GGSN, connection between the system and an external network is established, transmission of data after connection is established, the GPRS monitoring terminal acquires field data of the power system device by using a PMU device, a data packet is established according to an application layer protocol and sent to a monitoring center server, meanwhile, the monitoring terminal also responds to a control instruction and a data request of the monitoring center, and transparent through data transmission is performed between the monitoring center server and the monitoring terminal.
The specific transmission process is as follows:
acquiring upload data from a Micro Control Unit (MCU) through a serial interface GPRS module;
transmitting the processed data to a base station according to a GPRS packet data form;
SGSN packages the packet data phase GPRS IP backbone network to send;
the packet data is received by another GPRS terminal, and the packet data is transmitted to the destination SGSN and then to the GPRS terminal through the BSS.
Furthermore, the GPRS network consists of a GPRS communication module, a main control processor, a state display module and an intelligent monitoring instrument module, the core of the system is the main control processor, instructions from the GPRS network are analyzed by the main control processor, the intelligent instruments on the 485 bus are managed, the overall state of the site is monitored, and the GR47 wireless module is used by the GPRS communication module.
Further, the user can configure the GR47 to implement transparent pass-through data transmission between the monitoring server and the LPC2106, the key part for obtaining GPRS network services is the SIM card, which starts GPRS services before use, E2PROM stores user data, GPRS connection parameter, server IP address and GPRS server time constant are all from E2The PROM is stored and only configured once, the communication between the LPC2106 and the upper computer is realized through a debugging interface which finishes the writing and the extraction of codes, sets the LPC2106, analyzes the data transmitted on a 485 bus and monitors and debugs the running condition of the system even if the LPC2106 is restarted or the endpoint and the terminal are reset and cannot respond to GPRS connection parameters.
Furthermore, a PMU device is installed on a node of the power system to measure the current and voltage of a branch circuit connected with the node of the power system, equipment monitoring measurement is obtained, and a PMU optimization configuration strategy is adopted under the condition that the number of observable channels is limited by utilizing the running condition monitoring of the installation node and the adjacent node of the PMU device.
Further, a PMU configuration with L observation channels exists on a node k of the power system, and the node k are simultaneously connected with NkEach node is connected with L which is more than or equal to NkNode k and all associated nodes are considerable, otherwise r existskThe PMU configuration mode ensures that L connection nodes are considerable, and the formula (1) is rkDefinition of (1):
furthermore, PMU with limited number of observation channels is introduced, a new incidence matrix B is obtained through the node incidence matrix A, and the corresponding node numbers, r, in the matrix B are calculated by using the formula (1) and the formula (2)k=1, rows of the matrix a corresponding to the node kA change occurs; if r isk>1, the number of rows corresponding to node k is
l is the dimension of matrix B, l is rkIn the case of a limit on observable channel data, redefining the PMU configuration:
in equations (3) and (4), Y represents the PMU configuration strategy, and a non-zero value in Y demonstrates that the PMU configuration strategy can observe the voltage phase angle of the corresponding row in the associated node, ci and yi represent function constants, u represents a non-zero constant, and F the voltage phase angle.
The invention takes the wireless communication network technology as the basis, uses PMU to collect the monitoring information of the electric power system equipment, transmits the monitoring information through the GPRS mobile communication network, and realizes the real-time remote monitoring of the electric power system equipment through the monitoring center. The system has high performance and high advantage in the aspect of transmission of monitoring information due to the GPRS mobile communication network, and a good foundation is laid for the system due to data transmission, so that the system is guaranteed to have better performance in the aspect of monitoring.
Drawings
FIG. 1 is a general block diagram of the system of the present invention;
fig. 2 is a hardware configuration diagram of the remote monitoring system of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments can be combined with each other without conflict, and the present application will be further described in detail with reference to the drawings and specific embodiments.
As shown in fig. 1, a system and method for maintaining a network based on wireless communication includes a GPRS network, a monitoring center server, and a monitoring terminal.
The GPRS network utilizes a PMU device to collect field data and protect and control the field; transparent data transmission between the monitoring terminal and the monitoring center server is realized through a GPRS network; the monitoring center server analyzes the field data and sends a control instruction, a database is maintained in daily work, a system collects relevant data of field power equipment through a PMU device in a GPRS network, the data are transmitted to a mobile base station and then received by a mobile company server, the Internet provides network support for the mobile company server and transmits the data to an Ethernet of the monitoring center, and the Internet is connected with the Ethernet through a communication server; the monitoring center server receives the power equipment data received by the Ethernet, and the power equipment data are subjected to real-time remote monitoring through cooperation of the decision support server, the GIS system server, the database server and the monitoring workstation.
The GPRS monitoring terminal acquires field data of the power system equipment by using a PMU device, constructs a data packet according to an application layer protocol and sends the data packet to a monitoring center server, and meanwhile, the monitoring terminal can also respond to a control instruction and a data request of the monitoring center, and the monitoring center server and the monitoring terminal transmit transparent data.
The specific transmission process is as follows:
acquiring upload data from a Micro Control Unit (MCU) through a serial interface GPRS module;
transmitting the processed data to a base station according to a GPRS packet data form;
SGSN packages the packet data phase GPRS IP backbone network to send;
the packet data is received by another GPRS terminal, and the packet data is first transmitted to the destination SGSN and then transmitted to the GPRS terminal through the BSS.
The GPRS network consists of a GPRS communication module, a main control processor, a state display module and an intelligent monitoring instrument module, the core of the system is the main control processor, LPC2106 supports tracking and real-time simulation, and the system is an ARM7TDMI-S CPU which comprises 64KBSRAM, a two-wire serial port, a 128KB high-speed FLASH and a serial port connected with a Modem interface after being communicated. The instruction from the GPRS network is analyzed by the main control processor, the intelligent instrument on the 485 bus is managed, the overall state of the site is monitored, and the GPRS communication module uses a GR47 wireless module.
The user can configure GR47 to realize transparent data transmission between the monitoring server and LPC2106, the key part for acquiring GPRS network service is SIM card, before use, the SIM card starts GPRS service, E2PROM stores user data, GPRS connection parameter, server IP address and GPRS server time constant are all from E2The PROM is stored and only configured once, the communication between the LPC2106 and the upper computer is realized through a debugging interface which finishes the writing and the extraction of codes, sets the LPC2106, analyzes the data transmitted on a 485 bus and monitors and debugs the running condition of the system even if the LPC2106 is restarted or the endpoint and the terminal are reset and cannot respond to GPRS connection parameters.
A PMU device is installed on a node of an electric power system to measure current and voltage of a branch circuit connected with the node of the electric power system, equipment monitoring measurement is obtained, and a PMU optimization configuration strategy is adopted under the condition that the number of observable channels is limited by utilizing the running condition monitoring of the installation node of the PMU device and an adjacent node.
A PMU configuration with L observation channels exists on a node k of a power system, and the node k are simultaneously connected with NkEach node is connected with L which is more than or equal to NkNode k and all associated nodes are considerable, otherwise r existskThe PMU configuration mode ensures that L connection nodes are considerable, and the formula (1) is rkDefinition of (1):
furthermore, PMU with limited number of observation channels is introduced, a new incidence matrix B is obtained through the node incidence matrix A, and the corresponding node numbers, r, in the matrix B are calculated by using the formula (1) and the formula (2)k=1, no change in the row of matrix a corresponding to node k; if r isk>1, the number of rows corresponding to node k is
l is the dimension of matrix B, l is rkIn the case of a limit on observable channel data, redefining the PMU configuration:
in equations (3) and (4), Y represents the PMU configuration strategy, and a non-zero value in Y demonstrates that the PMU configuration strategy can observe the voltage phase angle of the corresponding row in the associated node, ci and yi represent function constants, u represents a non-zero constant, and F the voltage phase angle.
In order to verify the system performance, relevant data of real power system equipment of a certain city transformer substation are used as research objects, and Matlab simulation software is used for developing simulation experiments. The system provides electric power support for 80% of residents and places in the whole city, and the contained electric power system equipment is divided into power generation equipment and power supply equipment, wherein the power generation equipment is a generator, a power station boiler, a transformer and a steam turbine; the power supply equipment comprises a contactor, a mutual inductor and power transmission lines with different voltage grades. The verification is developed from two aspects, namely the transmission performance verification of the wireless communication network and the real-time performance and the accuracy of monitoring output.
In order to contrast the experimental results, a transformer substation infrared monitoring system (infrared monitoring system for short) and a transformer substation direct-current power supply remote monitoring system (direct-current power supply monitoring system for short) based on the intelligent vision internet of things are used at the same time.
In the data transmission process of the two comparison systems, the success rate of data transmission is gradually reduced along with the increase of the number of data packets, wherein the success rate of transmission of the direct-current power supply monitoring system is reduced to be below 60%, and the success rate of transmission of the infrared monitoring system is reduced to be below 70%.
The transmission rate of the wireless communication network of the system is obviously higher than that of the two comparison systems, which shows that the system has absolute advantages and analysis reasons during data transmission, and mainly because the system uses the GPRS wireless communication network, the speed, the accuracy and the efficiency of data transmission are improved, and the system has good system performance.
The transmission time delay of the system is far lower than that of two comparison systems, and the trend changes more slowly without obvious fluctuation in statistics of a plurality of experiments. The trend fluctuation of the two comparison systems is large, the transmission delay is high, the delay of the direct-current power supply monitoring system is close to 2S, the waiting time is long when a user uses the system, and poor user experience can be caused.
The error rate is a key index for verifying the data transmission performance of the system, the error rate comparison conditions of the three systems under the condition of different data packet numbers are compared, the system has a low error rate, the data transmission has reliability, and the method has great advantages compared with similar systems and meets the requirements of a monitoring system during data transmission.
In the general rainy weather, better monitoring result can also be guaranteed to two kinds of contrast system, but under extremely adverse weather environment, two kinds of contrast system monitoring accuracy all fall to below 80%, and the system keeps better monitoring accuracy all the time, even still can keep more than 90% monitoring accuracy under extremely adverse circumstances, proves that the system has good monitoring performance.
The invention takes the wireless communication network technology as the basis, firstly, the wireless communication is adopted to collect the field data of the power system equipment, the monitoring terminal transmits the data to the mobile base station, then the data is transmitted to the Ethernet through the server, and the data is respectively transmitted to modules such as a monitoring workstation and the like, thereby realizing the remote real-time monitoring of the power system equipment. The verification proves that the system has the advantages of high transmission success rate, high speed, low error rate and the like in the aspect of network communication, and has the characteristics of accurate monitoring result, strong capability of resisting the influence of environmental factors and the like in the aspect of monitoring effect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various equivalent changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (7)
1. A maintenance system based on wireless communication network is characterized in that the system comprises a GPRS network, a monitoring center server and a monitoring terminal;
the GPRS network utilizes a PMU device to collect field data and protect and control the field; transparent data transmission between the monitoring terminal and the monitoring center server is realized through a GPRS network; the monitoring center server analyzes the field data and sends a control instruction, the daily work is to maintain a database, a system collects relevant data of field power equipment through a PMU device in a GPRS network, the data are transmitted to a mobile base station and then received by a mobile company server, the Internet provides network support for the mobile company server and transmits the data to the Ethernet of the monitoring center, and the Internet is connected with the Ethernet through a communication server; the monitoring center server receives power equipment data received by the Ethernet, and the power equipment data are cooperatively used for real-time remote monitoring of the power equipment through the decision support server, the GIS system server, the database server and the monitoring workstation;
the GPRS monitoring terminal acquires field data of the power system equipment by using a PMU device, constructs a data packet according to an application layer protocol and sends the data packet to a monitoring center server, and meanwhile, the monitoring terminal can also respond to a control instruction and a data request of the monitoring center, and the monitoring center server and the monitoring terminal transmit transparent data.
2. The system and method for maintaining based on wireless communication network as claimed in claim 1, wherein the specific transmission process is as follows:
acquiring upload data from a Micro Control Unit (MCU) through a serial interface GPRS module;
transmitting the processed data to a base station according to a GPRS packet data form;
SGSN packages the packet data phase GPRS IP backbone network to send;
the packet data is received by another GPRS terminal, and the packet data is transmitted to the destination SGSN and then to the GPRS terminal through the BSS.
3. The maintenance system according to claim 1, wherein the GPRS network comprises a GPRS communication module, a main processor, a status display module, and an intelligent monitoring instrument module, the core of the system is the main processor, instructions from the GPRS network are analyzed by the main processor, the intelligent instrument on the 485 bus is managed, and the overall status of the site is monitored, and the GPRS communication module uses a GR47 wireless module.
4. The wireless communication network-based maintenance system of claim 1, wherein the user can use the system to perform maintenance on the wireless communication networkThe GR47 can be configured, transparent passing data transmission between the monitoring server and the LPC2106 is realized, the key part for acquiring GPRS network service is the SIM card, the GPRS service is started by the SIM card before use, and E2PROM stores user data, GPRS connection parameter, server IP address and GPRS server time constant are all from E2The PROM is stored and only configured once, the communication between the LPC2106 and the upper computer is realized through a debugging interface which finishes the writing and the extraction of codes, sets the LPC2106, analyzes the data transmitted on a 485 bus and monitors and debugs the running condition of the system even if the LPC2106 is restarted or the endpoint and the terminal are reset and cannot respond to GPRS connection parameters.
5. A maintenance method based on a wireless communication network is characterized in that a PMU device is installed on a node of a power system to measure current and voltage of a connected branch of the node of the power system, equipment monitoring measurement is obtained, and a PMU optimization configuration strategy is adopted under the condition that the number of observable channels is limited by utilizing the monitoring of the operation conditions of the installation node of the PMU device and an adjacent node.
6. A method for maintenance over a wireless communication network according to claim 5, characterized in that there is a PMU configuration with L observation channels at power system node k, node k being simultaneous with NkEach node is connected with L which is more than or equal to NkNode k and all associated nodes are considerable, otherwise r existskThe PMU configuration mode ensures that L connection nodes are considerable, and the formula (1) is rkDefinition of (1):
7. a method as in claim 6A maintenance method of a line communication network is characterized in that PMUs with limited observation channel number are introduced, a new incidence matrix B is obtained through a node incidence matrix A, and the corresponding node numbers, r, in the matrix B are calculated by using a formula (1) and a formula (2)k=1, no change occurs in the row of matrix a corresponding to node k; if r isk>1, the number of rows corresponding to node k is
l is the dimension of matrix B, l is rkIn the case of a limit on observable channel data, redefining the PMU configuration:
in equations (3) and (4), Y represents the PMU configuration strategy, and a non-zero value in Y demonstrates that the PMU configuration strategy can observe the voltage phase angle of the corresponding row in the associated node, ci and yi represent function constants, u represents a non-zero constant, and F the voltage phase angle.
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| CN111082518A (en) * | 2019-11-18 | 2020-04-28 | 中国电力企业联合会电力建设技术经济咨询中心 | Power grid operation fault monitoring system based on multidimensional data |
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