CN106709158B - Performance improvement method of power grid feeder automation system - Google Patents
Performance improvement method of power grid feeder automation system Download PDFInfo
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- CN106709158B CN106709158B CN201611096549.0A CN201611096549A CN106709158B CN 106709158 B CN106709158 B CN 106709158B CN 201611096549 A CN201611096549 A CN 201611096549A CN 106709158 B CN106709158 B CN 106709158B
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- 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
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Abstract
The invention discloses a performance improvement method of a power grid feeder automation system, which comprises the steps of obtaining power grid operation data; an offline power grid feeder automation simulation system is set up; simulating and analyzing the automatic action of the power grid feeder and acquiring the action characteristic; correcting and verifying the action characteristics; and putting the power grid feeder automation system into an actual power grid to finish the performance improvement of the power grid feeder automation system. The invention can effectively improve the working accuracy of the power grid feeder automation system, ensure the safe and reliable operation of the power distribution network and improve the power grid feeder automation correct action rate; and the method is simple and reliable and has wide application range.
Description
Technical Field
The invention belongs to the field of power system automation, and particularly relates to a performance improvement method of a power grid feeder automation system.
Background
With the development of national economic technology and the improvement of living standard of people, the automation technology and the automation control are widely applied to the production and the life of people, and bring endless convenience to people.
The automation of the power system is a reliable guarantee for the safe and stable operation of the power system. At present, each local power grid is or just is configured with a new distribution automation system (hereinafter abbreviated as DMS), and an urban distribution terminal is transformed into an intelligent terminal, so that each local power grid is provided with feeder automation (hereinafter abbreviated as FA) conditions.
In many areas, a plurality of lines are transformed through distribution automation and put into an FA full-automatic mode operation. However, in 2015 statistics, the action accuracy of FA was only 68.75%. The operation and maintenance personnel find the following problems by analyzing the operation of the FA: 1. normal operation of the dispatcher triggers FA false start: the DMS system takes a branch signal of a dispatcher remotely opening an outgoing line breaker, an overcurrent signal sent by a circuit ring main unit switch when the outgoing line breaker is closed remotely, and the like as starting conditions; 2. the existing DTU equipment has insufficient telemetering acquisition sensitivity and cannot acquire electrical data change, so that FA cannot be started under the fault condition; 3. the FA starting strategy and the protection reclosing action time sequence of the distribution network line have problems, so that FA is started by mistake; 4. FA false start, false judgment and false judgment conditions occur due to a series of problems of a regional power distribution network structure, an equipment operation environment, a graph model connection relation and the like; 5. other abnormal situations, etc.
Due to the adoption of the multiple problems, the correctness of the FA action is not high, and the relatively low action correctness of the FA action seriously influences the normal work of the power grid system, so that the power grid system bears unnecessary loss, and the electricity consumption experience of an electricity consumer is also seriously reduced.
Disclosure of Invention
The invention aims to provide a method for improving the performance of a power grid feeder automation system, which can effectively improve the working accuracy of the power grid feeder automation system and is simple and reliable.
The invention provides a performance improvement method of a power grid feeder automation system, which comprises the following steps:
s1, acquiring the operation data of the power grid to be analyzed;
s2, according to the power grid operation data obtained in the step S1, an offline power grid feeder automation simulation system is set up;
s3, in the offline simulation system set up in the step S2, carrying out simulation analysis on the power grid feeder automation action, and acquiring the power grid feeder automation action characteristic of the power grid to be analyzed;
s4, correcting the power grid feeder automation action characteristics of the power grid to be analyzed, which are acquired in the step S3, according to the standard, and verifying the characteristics in an offline power grid feeder automation simulation system;
and S5, inputting the corrected power grid feeder automation action of the power grid to be analyzed, which is verified in the step S4, into the actual power grid to be analyzed, and finishing the performance improvement of the power grid feeder automation system.
The operation data of the power grid acquired in step S1 includes a graph model of the distribution automation system, a distribution automation system database, a power grid feeder automation function, and the like.
S2 the method for building the offline power grid feeder automation simulation system specifically comprises the following steps:
A. configuring a simulation workstation, and configuring the workstation as a node of an independent server in a real-time system;
B. loading a real-time distribution automation system CSGC3000 platform to the workstation;
C. configuring environmental variables of a CSGC3000 platform and a database;
D. installing the workstation on an oracle11g server side;
E. exporting a real-time power distribution automation system parameter library and importing the real-time power distribution automation system parameter library into a stand-alone database of the workstation;
F. and (3) starting the CSGC3000 program on the workstation and running the dsshmi process to perform FA fault simulation test.
The characteristics of the power grid feeder automation actions of the power grid to be analyzed in step S3 include action logic of the power grid feeder automation actions, action time sequence of the power grid feeder automation actions, action time of the power grid feeder automation actions, response speed of the power grid feeder automation actions, and the like.
According to the performance improvement method of the power grid feeder automation system, the performance improvement of the power grid feeder automation system is completed by building an offline power grid feeder automation simulation analysis platform corresponding to an actual power grid, simulating, analyzing, improving and verifying power grid feeder automation actions on the offline simulation analysis platform, and putting the verified power grid feeder automation actions into the actual power grid to be analyzed; therefore, the method can effectively improve the working accuracy of the power grid feeder automation system, and reduces the false start, false judgment and false judgment of the power grid feeder automation caused by the strategy problem by actually putting the optimized power grid feeder automation strategy into use, so as to wrongly isolate or not isolate the power grid fault point; fault points are accurately positioned and isolated, power failure time is reduced, and power supply quality is improved; meanwhile, the condition of accident expansion caused by non-isolated faults can be effectively prevented, and the safe and reliable operation of the power distribution network is ensured, so that a power grid feeder automation strategy suitable for the operation of a local power distribution network is found, and the correct action rate of power grid feeder automation is improved; and the method is simple and reliable and has wide application range.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention.
Fig. 2 is a schematic diagram showing a comparison between before and after improvement of a first embodiment of a specific application of the present invention.
Fig. 3 is a schematic diagram showing a modified before-after comparison of a second embodiment of a specific application of the present invention.
Detailed Description
FIG. 1 shows a schematic flow chart of the method of the present invention: the invention provides a performance improvement method of a power grid feeder automation system, which comprises the following steps:
s1, acquiring the operation data of the power grid to be analyzed: the method comprises the data of a graph model of a distribution automation system, a distribution automation system database, a power grid feeder automation function and the like;
s2, according to the power grid operation data obtained in the step S1, an offline power grid feeder automation simulation system is set up;
the method for constructing the offline power grid feeder automation simulation system specifically comprises the following steps:
A. configuring a simulation workstation, and configuring the workstation as a node of an independent server in a real-time system;
B. loading a real-time distribution automation system CSGC3000 platform to the workstation;
C. configuring environmental variables of a CSGC3000 platform and a database;
D. installing the workstation on an oracle11g server side;
E. exporting a real-time power distribution automation system parameter library and importing the real-time power distribution automation system parameter library into a stand-alone database of the workstation;
F. and (3) starting the CSGC3000 program on the workstation and running the dsshmi process to perform FA fault simulation test.
The built system comprises an alarm viewer module, a dispatcher operation interface and a real-time library viewer; the real-time library viewer comprises five modules of operation monitoring, abnormity monitoring, operation management, user information and system state; the alarm viewer is used for displaying all remote signaling signals uploaded by the system in real time, and dividing the signals into 8 categories of accidents, abnormity, line crossing, displacement, notification, soe, systems and communication; the dispatcher operation interface is used for a dispatcher to monitor the equipment and execute various operations through the interface and is a core part of the power distribution automation master station system; the operation monitoring comprises station monitoring for displaying a primary wiring diagram of a transformer substation, line monitoring for displaying a 10kV distribution network wiring diagram, remote signaling monitoring for inquiring various remote signaling information of equipment, remote control operation for performing remote control operation in the substation and plate hanging operation for hanging different types of signboards on the equipment; the abnormity monitoring is used for displaying the lines in an abnormal mode in a list form, and the lines are classified into 5 types of maintenance lines, loop closing lines, fault lines and transfer supply lines; the operation management is used for displaying a power protection circuit (a power protection plate is hung on the circuit), a concerned circuit (filtered by a current value or a load rate), manual counting equipment and plate hanging equipment in a list form, and inquiring equipment light word plates, remote measurement and zero sequence current; the user information is used for enumerating dual-power users, important users and large users in a text form; the system state is mainly used for checking the total number and the online rate of the distribution network terminals.
S3, in the offline simulation system set up in the step S2, performing simulation analysis on the power grid feeder automation action to obtain the power grid feeder automation action characteristics of the power grid to be analyzed, wherein the simulation analysis specifically comprises action logic of the power grid feeder automation action, action time sequence of the power grid feeder automation action, action time of the power grid feeder automation action, response speed of the power grid feeder automation action and the like;
s4, correcting the power grid feeder automation action characteristics of the power grid to be analyzed, which are acquired in the step S3, according to the standard, and verifying the characteristics in an offline power grid feeder automation simulation system;
and S5, inputting the corrected power grid feeder automation action of the power grid to be analyzed, which is verified in the step S4, into the actual power grid to be analyzed, and finishing the performance improvement of the power grid feeder automation system.
The utility of the process of the invention is illustrated below with reference to several examples.
The first embodiment is as follows:
(1) existing FA startup procedures were analyzed. In the existing FA system, the normal FA starting condition is a switch opening signal + an overcurrent signal or an accident total signal under the condition of switch fault tripping. The action logic is that a switch opening signal is sent upwards, the signal is kept for 3 minutes, the signal is used as an FA starting condition within 3 minutes, and FA false starting is caused if a line flow signal is sent upwards within the period;
(2) and analyzing FA false start cases. As shown in the case of the daisy-chain in fig. 2 below. When the power grid is in fault and grounded, a dispatcher can carry out remote control operation on the circuit breaker in the accident handling process. When the remote control is carried out on the switch-off and then the switch-on, the automatic terminal uploads an overcurrent signal or an accident total signal due to the reason that the line excitation surge is overlarge, and the fault-free line FA is started by mistake due to the remote control switch-off signal and the overcurrent and accident total signal of the excitation surge;
(3) improve FA starting conditions and starting logic strategies. The analysis shows that the time of the protection action process (overcurrent signal, accident total signal and switch opening signal) is short, and the protection action process can be completely sent within one minute. In the accident handling process, after the remote control switching-off is needed due to grounding exploration or sectional trial sending, the time between the remote control switching-on and the remote control switching-off is usually more than one minute, and the average time is about 1 minute and 20 seconds. If the retention time of the switch opening signal is changed from the existing 3 minutes to 1 minute, the normal start of the FA under the fault condition can be effectively ensured, and the FA is prevented from being started by mistake due to the fact that a dispatcher remotely controls opening during accident handling, and the principle of the FA is as shown in the following figure 2.
After the countermeasure is implemented, the FA false start phenomenon caused by remote control operation of a dispatcher does not occur.
Example two (effect shown in fig. 3):
(1) analyzing the existing FA starting program and the FA fault positioning error case.
When a distribution automation line fails, the ring main unit interval through which fault current flows can send an overcurrent signal, and FA only sequentially serves as a fault point judgment basis, and the tail end ring main unit interval through which fault current flows and the fault point. If no overcurrent signal is sent at the fault interval of the end ring main unit due to defects and other reasons, the fault point judgment by the FA is wrong, the isolation range is expanded, and the network personnel are misled to search the fault point, which is specifically described as follows.
48-five light wires 344 circuit board camera ports H02 ring main unit 304 and Jian Lu Ji H01 ring main unit 302 trip out in 2015, 13 th day 17, but no overcurrent signal is sent to the Jian Lu Ji H01 ring main unit (tail end ring main unit) 310 and 302, the FA judges according to the overcurrent signal, positions the fault point at the rear switch section of the board-arranged port H02 ring main unit (penultimate ring main unit) 304, and finds that the fault point is at the rear switch section of the Jian Lu Ji H01 ring main unit 302 as a result of post-line inspection;
(2) improving the condition of FA fault location. Analysis shows that the existing FA fault location logic only singly depends on an overcurrent signal sent by a ring main unit interval through which fault current flows as a judgment basis, and in case, even if a circuit rear ring main unit interval protection outlet trips, the existing FA functional fault location logic cannot be located at the fault point. And after the project group analysis, the configuration file of the total protection outlet signal of the FA function fault positioning function is modified, and the protection outlet signal sent by the distribution automation terminal equipment is brought into the FA fault positioning judgment logic condition, so that the fault positioning function of the FA function is improved to a great extent.
After the countermeasure is implemented, the phenomenon that the protection signal of the distribution automation terminal cannot locate the fault does not occur.
Claims (4)
1. A performance improvement method of a power grid feeder automation system comprises the following steps:
s1, acquiring the operation data of the power grid to be analyzed;
s2, according to the power grid operation data obtained in the step S1, an offline power grid feeder automation simulation system is set up;
s3, in the offline simulation system set up in the step S2, carrying out simulation analysis on the power grid feeder automation action, and acquiring the power grid feeder automation action characteristic of the power grid to be analyzed; the characteristics of the power grid feeder automation actions of the power grid to be analyzed comprise action logics of the power grid feeder automation actions, action time sequences of the power grid feeder automation actions, action time of the power grid feeder automation actions and response speed of the power grid feeder automation actions;
s4, correcting the power grid feeder automation action characteristics of the power grid to be analyzed, which are acquired in the step S3, according to the standard, and verifying the characteristics in an offline power grid feeder automation simulation system;
and S5, inputting the corrected power grid feeder automation action of the power grid to be analyzed, which is verified in the step S4, into the actual power grid to be analyzed, and finishing the performance improvement of the power grid feeder automation system.
2. The method of claim 1, wherein the operation data of the power grid obtained in step S1 includes a graph model of the distribution automation system, a distribution automation system database, and a power grid feeder automation function.
3. The method according to claim 1, wherein the step S2 of building an offline power grid feeder automation simulation system specifically includes the following steps:
A. configuring a simulation workstation, and configuring the workstation as a node of an independent server in a real-time system;
B. loading a real-time distribution automation system CSGC3000 platform to the workstation;
C. configuring environmental variables of a CSGC3000 platform and a database;
D. installing the workstation on an oracle11g server side;
E. exporting a real-time power distribution automation system parameter library and importing the real-time power distribution automation system parameter library into a stand-alone database of the workstation;
F. and (3) starting the CSGC3000 program on the workstation and running the dsshmi process to perform FA fault simulation test.
4. The method according to claim 2, wherein the step S2 of building an offline power grid feeder automation simulation system specifically includes the following steps:
A. configuring a simulation workstation, and configuring the workstation as a node of an independent server in a real-time system;
B. loading a real-time distribution automation system CSGC3000 platform to the workstation;
C. configuring environmental variables of a CSGC3000 platform and a database;
D. installing the workstation on an oracle11g server side;
E. exporting a real-time power distribution automation system parameter library and importing the real-time power distribution automation system parameter library into a stand-alone database of the workstation;
F. and (3) starting the CSGC3000 program on the workstation and running the dsshmi process to perform FA fault simulation test.
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| US8634175B2 (en) * | 2011-04-13 | 2014-01-21 | Siemens Industry, Inc. | Method and system for programming and implementing automated fault isolation and restoration using sequential logic |
| CN102255391B (en) * | 2011-07-29 | 2013-10-30 | 南京因泰莱配电自动化设备有限公司 | Feeder automation system with on-line protective fixed value setting function |
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