CN111458586A - Batch synchronous detection method and system for multi-interval in-situ line protection device of intelligent substation - Google Patents
Batch synchronous detection method and system for multi-interval in-situ line protection device of intelligent substation Download PDFInfo
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention discloses a batch synchronous detection method and a system for multi-interval in-place line protection devices of an intelligent substation. The invention can realize batch same-frequency automatic maintenance and test of the multi-interval in-situ line protection device, not only improves the automatic detection efficiency, but also can truly simulate the field operation environment, and ensures the safe and reliable operation of the power grid.
Description
Technical Field
The invention relates to a detection technology of an intelligent substation in-situ line protection device, in particular to a batch synchronous detection method and system of a multi-interval in-situ line protection device of an intelligent substation.
Background
Since 2009 a, a national grid company starts the construction of an intelligent substation on test, and at present, about 5000 more intelligent substations including a first-generation intelligent substation and a second-generation intelligent substation are built domestically. The intelligent substation achieves certain effect in the aspects of economy, energy conservation, environmental protection and the like due to high system integration and reasonable structural layout. However, in practical applications, many problems are also exposed. Particularly, in the aspect of operation and maintenance of the intelligent substation, the development of the intelligent substation is greatly restricted by heavy maintenance workload and high maintenance cost. In order to achieve the aims of high reliability of power supply of a power grid and high efficiency of operation and detection of a transformer substation, a national power grid company starts on-site protection intelligent transformer substation test point construction work in 2018. The control core equipment of the intelligent transformer substation with on-site protection is in-site protection, namely secondary protection is realized in-site, the protection function is modularized, and the control of the whole substation is intelligent. The on-site protection device is one of key components for protecting the safety of a power grid, and how to effectively detect, monitor and manage a huge number of secondary on-site protection devices is a key problem to be solved urgently for protecting the safe and stable operation of the intelligent substation in an on-site manner.
① local line protection devices have no liquid crystal display structure, related function maintenance and debugging are carried out by adopting a manual detection mode of a traditional relay protection tester and a management machine, the types of used test equipment and tools are multiple, the operation is complex, the automation degree is low, ② 220kv and above voltage levels of line intervals are multiple, and line protection adopts double-set configuration, so that the quantity of the local line protection devices is huge, one set of the local line protection devices respectively carries out test and test, the efficiency is low, the field operation is not facilitated, ③ line protection multiple-interval operation and bus protection have interlocking relations such as failure connection and jumping, single-interval line protection test cannot carry out integral maintenance and verification on the mutual influence relation of multiple line intervals and the matching relation with the bus protection, and the actual operation working condition on the field cannot be really displayed.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention provides a batch synchronous detection method and system for multi-interval in-situ line protection devices of an intelligent substation, aiming at the problems of the multi-interval in-situ line protection devices in maintenance and debugging.
In order to solve the technical problems, the invention adopts the technical scheme that:
a batch synchronous detection method for intelligent substation multi-interval in-situ line protection devices comprises the following implementation steps:
1) the method comprises the following steps of setting up a test environment, connecting each spaced in-situ line protection device with a batch synchronous detection system respectively, wherein each spaced in-situ line protection device adopts an independent data source, the batch synchronous detection system comprises an upper computer and a plurality of integrated electronic information output control devices, each integrated electronic information output control device comprises an output interface, an input interface, an optical digital communication interface and a plurality of small signal output interfaces, the front ends of the small signal output interfaces are connected with a power amplifier in series, and the power amplifier comprises a voltage output module and a current output module;
2) creating an execution case template base for batch synchronous detection according to a model base and a rule base which are preset based on a predictive control theory and used for batch synchronous detection, wherein the model base comprises the output quantity of each comprehensive electronic information output control device and channel mapping between MMS messages output by each interval in-situ line protection device, and the rule base comprises the output quantity of each comprehensive electronic information output control device and comparison rules of each interval in-situ line protection device;
3) the batch synchronous detection system sequentially executes according to preset contents of execution cases in an execution case template library, simulates single-phase earth faults and interphase short-circuit faults of the on-site line protection devices at all intervals, simultaneously analyzes and judges the faults of the on-site line protection devices at different intervals in a closed-loop control mode, and acquires corresponding detection results;
4) and summarizing the test results of the local line protection devices of each interval and generating a detection report.
Optionally, the output quantity of each integrated electronic information output control device in the model library includes four categories of analog quantity voltage and current, output quantity position, input quantity acquisition and optical digital communication address, and is instantiated and processed to establish a corresponding analog quantity voltage and current example, output quantity position example, input quantity acquisition example and communication address example, the MMS message output by each interval in-situ line protection device includes four categories of telemeasuring, telesignaling, protection logic and MMS communication IP, and is instantiated and processed to establish a corresponding telemeasuring quantity example, telesignaling example, protection logic example and communication IP example, the analog quantity voltage and current example, output quantity position example, input quantity acquisition example, communication address example of each integrated electronic information output control device and the telemeasuring quantity example of each interval in-situ line protection device, Handshake mapping relation is established among the remote signaling instance, the protection logic instance and the communication IP instance.
Optionally, the rule base includes: the consistency rule of the multi-interval in-place line protection voltage sampling channels comprises channel mapping between the voltage acquisition channels of the in-place line protection devices at intervals and the voltage output ports of the integrated electronic information output control equipment, and mapping between the voltage acquisition channels of the in-place line protection devices at intervals and a telemetering message sent to an upper computer; the consistency rule of the multi-interval in-place line protection current sampling channels comprises channel mapping between the current acquisition channels of the in-place line protection devices at intervals and the current output ports of the integrated electronic information output control equipment, and mapping between the current acquisition channels of the in-place line protection devices at intervals and a telemetering message sent to an upper computer; the sampling consistency rule of the positions of the multi-interval in-situ circuit protection circuit breakers comprises channel mapping between circuit breaker position acquisition channels of the in-situ circuit protection devices at intervals and output ports of the comprehensive electronic information output control equipment, and mapping between the circuit breaker position acquisition channels of the in-situ circuit protection devices at intervals and remote signaling messages sent to an upper computer; the sampling consistency rule of the multi-interval in-place line protection trip outlet comprises channel mapping between the trip outlet of each interval in-place line protection device and the input port of each comprehensive electronic information output control device, and mapping between the trip outlet of each interval in-place line protection device and the protection action logic of the upper computer.
Optionally, when performing fault analysis and discrimination on the local line protection devices at different intervals in step 3) to obtain corresponding detection results, the processing step of the local line protection device at a certain interval i includes: firstly, judging whether the local line protection device of the interval i successfully identifies the single-phase earth fault and the interphase short-circuit fault, if the single-phase earth fault and the interphase short-circuit fault cannot be successfully identified, judging that the local line protection device of the interval i is in an abnormal state Si _ N1 and recording abnormal contents, otherwise judging that the fault phase, the trip exit and the action time of the local line protection device of the interval i are correct, if not, judging that the local line protection device of the interval i is in an abnormal state Si _ N2 and recording abnormal contents, otherwise, judging that the local line protection device of the interval i is in a normal state Si _ N3, thereby obtaining the test result of the local line protection device of the interval i.
Optionally, the step 4) further includes a step of performing defect elimination processing on the in-place line protection device with the abnormal state.
In addition, the invention also provides a detection system for applying the intelligent substation multi-interval in-situ line protection device batch synchronous detection method, which comprises an upper computer and a plurality of integrated electronic information output control devices, wherein each integrated electronic information output control device comprises an output interface, an input interface, an optical digital communication interface and a plurality of small signal output interfaces, the front ends of the small signal output interfaces are connected with a power amplifier in series, and the power amplifier comprises a voltage output module and a current output module.
Optionally, the integrated electronic information output control device includes a core control unit, a small signal output unit, an optical digital communication unit, an output unit, an input unit and a power supply unit, the core control unit is connected with the small signal output unit, the optical digital communication unit, the output unit and the input unit respectively, an output end of the power supply unit is connected with the core control unit, the small signal output unit, the optical digital communication unit, the output unit and the input unit respectively, and the small signal output unit has a plurality of small signal output interfaces.
Optionally, the core control unit includes a D/a module, an FPGA module, a control module, and a communication module, which are connected in sequence, an output end of the D/a module is connected to the small signal output unit, and an output end of the FPGA module is connected to the optical digital communication unit, the output unit, and the input unit, respectively.
Optionally, the core control unit is integrated on a mother circuit board, and the small signal output unit, the optical digital communication unit, the output unit, the input unit and the power supply unit are all respectively inserted and installed on different daughter circuit boards on the mother circuit board.
Optionally, the control module includes an ARM processor and a DSP processor connected to each other, where the ARM processor is connected to the FPGA module, and the DSP processor is connected to the communication module.
Compared with the prior art, the invention has the following advantages: the method solves the problem that the multi-interval in-situ line protection device of the intelligent substation cannot realize batch automatic detection through the method of judging cascade synchronous control and independent same-frequency model prediction, improves the one-key automatic test efficiency of the line protection device to the maximum extent, and eliminates unstable factors influencing the safe operation of the intelligent substation.
Drawings
FIG. 1 is a basic flow diagram of a method according to an embodiment of the present invention.
FIG. 2 is a detailed flow chart of a method according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of the construction of a model base and a rule base in the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a detection system in an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of the integrated electronic information output control apparatus in the embodiment of the present invention.
Detailed Description
The following will further describe the batch synchronous detection method and system for the intelligent substation multi-interval in-situ line protection devices in detail, taking the batch synchronous detection of the 4 interval in-situ line protection devices as an example. Needless to say, the intelligent substation multi-interval in-situ line protection device batch synchronous detection method and system are not limited to be applied to batch synchronous detection of 4 interval in-situ line protection devices.
As shown in fig. 1 and fig. 2, the implementation steps of the batch synchronous detection method for the intelligent substation multi-interval in-situ line protection devices in this embodiment include:
1) the method comprises the following steps of setting up a test environment, connecting each spaced in-situ line protection device with a batch synchronous detection system respectively, wherein each spaced in-situ line protection device adopts an independent data source, the batch synchronous detection system comprises an upper computer 1 and a plurality of integrated electronic information output control devices 2, each integrated electronic information output control device 2 comprises an output interface, an input interface, an optical digital communication interface and a plurality of small signal output interfaces, the front ends of the small signal output interfaces are connected with a power amplifier 3 in series, and the power amplifier 3 comprises a voltage output module and a current output module;
2) creating an execution case template base for batch synchronous detection according to a model base and a rule base which are preset based on a predictive control theory and used for batch synchronous detection, wherein the model base comprises the output quantity of each comprehensive electronic information output control device 2 and channel mapping between MMS messages output by each interval in-situ line protection device, and the rule base comprises the output quantity of each comprehensive electronic information output control device 2 and comparison rules of each interval in-situ line protection device;
3) the batch synchronous detection system sequentially executes according to preset contents of execution cases in an execution case template library, simulates single-phase earth faults and interphase short-circuit faults of local line protection devices at intervals, simultaneously analyzes and judges the faults of the local line protection devices at different intervals in a closed-loop control mode, and acquires corresponding detection results;
4) and summarizing the test results of the local line protection devices of each interval and generating a detection report.
The batch synchronous detection system comprises an upper computer 1 and a plurality of integrated electronic information output control devices 2, wherein the integrated electronic information output control devices 2 can realize synchronous output of a plurality of devices in a cascading mode, and control of a plurality of groups of analog quantity, switching value and optical digital signals is realized. The output signal of 0-10V alternating voltage is used for driving 6 paths of voltage and 6 paths of current power amplifiers to output, and independent control of local line protection analog quantity sampling data at different intervals is guaranteed. The analog quantity voltage current signals and the switching value signals are respectively and physically connected with different intervals in a point-to-point mode, and the optical digital communication interfaces are respectively connected with IEC61850 communication interfaces of different intervals through a network exchange communication principle, so that information interaction of MMS messages is realized. The optical digital communication interface of the integrated electronic information output control device 2 is respectively connected with IEC61850 communication ports of different intervals of in-situ line protection, the actual sampling data of different intervals of in-situ line protection devices, the circuit breaker position acquisition, the protection related event report and other contents are actively acquired in a model calling mode through an MMS client, the protection action fixed value, the pressing plate and other information of the in-situ line protection devices at different intervals are actively modified in a data preset mode, and the synchronous automatic detection of the functions and the performances related to the protection logic of the multi-interval in-situ line protection is realized through a closed-loop test mode of synchronous control output and synchronous control detection. Each interval of local line protection device is independently provided with a set of power amplifier 3, a voltage and current output channel and the local line protection device are physically connected in a point-to-point mode, the whole system hardware realizes independent control of the output of the power amplifier corresponding to each interval by one-to-many mode cascade control, the maximum expansion of the output of the hardware system power amplifier can be carried out under the assistance of clock synchronization signals, and the synchronous output of analog quantity sampling signals of the local line protection devices of all intervals of the intelligent substation is realized. Each interval on-site line protection device is provided with 8 independent output contacts and 8 input contacts, the output contacts are used for simulating the position acquisition of a circuit breaker of the on-site line protection device, and the input contacts are used for acquiring and subscribing the positions of a three-phase tripping outlet, a reclosing outlet and the like of the on-site line protection device. The switching value channel of the synchronous automatic detection system is physically connected with the in-place line protection devices at different intervals in a point-to-point mode, the hardware of the whole system realizes independent control of output of the outgoing quantity board card and subscription of the tripping position of the incoming quantity board card corresponding to each interval by cascade control of a pair of multiple modes, the switching value output channel and the switching value input channel of the hardware system can be maximally expanded under the assistance of a clock synchronization signal, independent control detection of the in-place line protection devices at all intervals of the intelligent substation is completed in a mode of model presetting and result prejudgment, and finally, all protection logic functions and performance automatic detection of the in-place line protection at all intervals are realized.
In the step 2) of this embodiment, a control detection model is constructed by a model prediction method, so that the hardware structure of the automatic detection system performs a batch synchronization function performance test on the multi-spacer in-place line protection at the same time. The automatic detection system sets a fault model, the control hardware system independently outputs related sampling signals to different intervals of on-site line protection, meanwhile, handshake mapping models and result judgment rules are respectively preset for the interval of on-site line protection, a closed-loop control principle is adopted to simultaneously carry out fault analysis and judgment on the different intervals of on-site line protection, and finally, batch synchronous automatic detection of the multi-interval on-site line protection device is realized by combining a closed-loop automatic simulation test technology under a one-to-many independent control strategy.
As shown in fig. 3, the output quantity of each integrated electronic information output control device 2 in the model library includes four categories of analog quantity voltage and current, output quantity position, input quantity acquisition and optical digital communication address, and the instantiated processing establishes a corresponding analog quantity voltage and current example, output quantity position example, input quantity acquisition example and communication address example, the MMS message output by each interval in-situ line protection device includes four categories of telemetry measurement, telemetry signaling, protection logic and MMS communication IP, and the instantiated processing establishes a corresponding telemetry quantity example, telemetry signaling example, protection logic example and communication IP example, the analog quantity voltage and current example, output quantity position example, input quantity acquisition example, communication address example of each integrated electronic information output control device 2 and the telemetry quantity example, telemetry quantity acquisition example, communication address example of each interval in-situ line protection device, Handshake mapping relation is established among the remote signaling instance, the protection logic instance and the communication IP instance.
As shown in fig. 3, the rule base includes: the consistency rule of the multi-interval in-place line protection voltage sampling channels comprises channel mapping between the voltage acquisition channels of the in-place line protection devices at intervals and the voltage output ports of the integrated electronic information output control equipment 2, and mapping between the voltage acquisition channels of the in-place line protection devices at intervals and a telemetering message sent to the upper computer 1; the consistency rule of the multi-interval in-place line protection current sampling channels comprises channel mapping between the current acquisition channels of the in-place line protection devices at intervals and the current output ports of the integrated electronic information output control equipment 2, and mapping between the current acquisition channels of the in-place line protection devices at intervals and a telemetering message sent to the upper computer 1; the sampling consistency rule of the positions of the multi-interval on-site line protection circuit breakers comprises channel mapping between circuit breaker position acquisition channels of the on-site line protection devices at intervals and output ports of the comprehensive electronic information output control equipment 2, and mapping between the circuit breaker position acquisition channels of the on-site line protection devices at intervals and remote signaling messages sent to the upper computer 1; the sampling consistency rule of the multi-interval in-place line protection trip outlet comprises channel mapping between the trip outlet of each interval in-place line protection device and the input port of each comprehensive electronic information output control device 2, and mapping between the trip outlet of each interval in-place line protection device and the protection action logic of the upper computer 1.
As shown in fig. 2, when performing fault analysis and discrimination on the local line protection devices at different intervals simultaneously in step 3) to obtain corresponding detection results, the processing step of the local line protection device for a certain interval i includes: firstly, judging whether the local line protection device of the interval i successfully identifies the single-phase earth fault and the interphase short-circuit fault, if the single-phase earth fault and the interphase short-circuit fault cannot be successfully identified, judging that the local line protection device of the interval i is in an abnormal state Si _ N1 and recording abnormal contents, otherwise judging that the fault phase, the trip exit and the action time of the local line protection device of the interval i are correct, if not, judging that the local line protection device of the interval i is in an abnormal state Si _ N2 and recording abnormal contents, otherwise, judging that the local line protection device of the interval i is in a normal state Si _ N3, thereby obtaining the test result of the local line protection device of the interval i. As shown in fig. 2, step 4) further includes a step of performing deletion processing (shown as protection function correction in fig. 3) for the local line protection device with the abnormal state.
In the embodiment, the batch synchronous detection method for the intelligent substation multi-interval in-situ line protection device utilizes the model preset control theory to construct the relevant model base and rule base. For the construction of a model base, a one-to-many control strategy is adopted, aiming at the batch automatic test of the multi-interval in-situ line protection device, the whole structure of the automatic detection system constructs a model according to an object, a class and an instantiation mode, the object is divided into a controlled object and a tested object, and different tested objects are created at different intervals. The class processing and instantiation processing of the controlled object comprise analog quantity voltage and current, an output position, an input position and optical digital communication, the class processing and instantiation processing of the tested object comprise remote measurement, remote signaling, logic and MMS communication IP addresses, and the controlled object adopt a point-to-point mode to carry out independent handshake mapping; for the construction of the rule base, the voltage, the current output channel, the output contact and the input contact channel of the hardware structure of the synchronous automatic detection system are respectively mapped with the multi-interval in-situ line protection by adopting a point-to-point mode, and the rule of comparing the hardware output of the automatic detection system with the protection number of the detected in-situ line is constructed. Finally, combining a model prediction control theory, forming the batch synchronous automatic detection of the closed-loop control on-site line protection device in a mode of constructing a control model base, setting a judgment rule, presetting a detection result in advance and comprehensively studying and judging the detection result; the multi-interval in-place line protection device adopts an independent data source structure and a control structure, and the uniqueness and the independence of fault types of different intervals of in-place line protection are guaranteed. The synchronous automatic detection system independently and synchronously simulates single-phase earth faults and interphase short-circuit faults of different intervals of in-situ line protection devices by adopting an independent data source structure, the MMS client side obtains information such as event reports, trip exit positions and the like of the in-situ line protection devices at different intervals by adopting a point-to-point mode through the event report obtaining module and the trip exit position obtaining module, and confirms whether the automatic detection results of the in-situ line protection devices at different intervals are correct or not by adopting a consistency synchronization comparison method according to a model prediction control theory. When the detection results of the different-interval in-situ line protection are consistent and meet the result judgment expectation, the related functions and performances of the multi-interval in-situ line protection are consistent and correct; when the detection result of part of intervals in the in-situ line protection at different intervals is different from the result judgment expectation, the related functions and performances in the in-situ line protection at the intervals have defects, and the defect contents can be actively identified through specific different equipment and contents; finally, batch synchronous automatic detection of local line protection functions and performances at different intervals is realized. In summary, the batch synchronous detection method for the intelligent substation multi-interval in-place line protection device in the embodiment is mainly applied to synchronous batch overhaul testing of the intelligent substation multi-interval in-place line protection and batch factory synchronous detection of multiple in-place line protection, and the synchronous automatic detection of the multiple in-place line protection is realized by adopting the control theory of model prediction, and meanwhile, on the basis of clock synchronization, the number of in-place line protection which is automatically detected at the same time can be further expanded. The batch synchronous detection method for the multi-interval in-situ line protection devices of the intelligent substation provides a new means for synchronous automatic test and maintenance of functions and performances of batch multi-interval in-situ line protection, and the technology can be applied to synchronous automatic detection of multiple sets of secondary protection devices of other types, so that the maintenance efficiency of in-situ intelligent substation is greatly improved, and the safe and reliable operation of a power grid is guaranteed.
As shown in fig. 4, the present embodiment further provides a detection system for the batch synchronous detection method of the multiple-interval in-situ line protection device of the intelligent substation, which includes an upper computer 1 and a plurality of integrated electronic information output control devices 2, where the integrated electronic information output control devices 2 include an output interface, an input interface, an optical digital communication interface, and a plurality of small signal output interfaces, a power amplifier 3 is connected in series at a front end of each small signal output interface, and the power amplifier 3 includes a voltage output module and a current output module.
As shown in fig. 5, the integrated electronic information output control apparatus 2 includes a core control unit 21, a small signal output unit 22, an optical digital communication unit 23, an output unit 24, an input unit 25, and a power supply unit 26, the core control unit 21 is connected to the small signal output unit 22, the optical digital communication unit 23, the output unit 24, and the input unit 25, respectively, an output terminal of the power supply unit 26 is connected to the core control unit 21, the small signal output unit 22, the optical digital communication unit 23, the output unit 24, and the input unit 25, respectively, and the small signal output unit 22 has a plurality of small signal output interfaces.
In order to facilitate the installation and maintenance of the integrated electronic information output control device 2, the core control unit 21 is integrated on the mother circuit board in this embodiment, and the small signal output unit 22, the optical digital communication unit 23, the output unit 24, the input unit 25, and the power supply unit 26 are all respectively inserted and installed on different daughter circuit boards on the mother circuit board, so that the installation and maintenance are facilitated, and the expansion is easy.
The core control unit 21 is a core component of the whole test system, as shown in fig. 5, the core control unit 21 includes a D/a module 211, an FPGA module 212, a control module 213, and a communication module 214, which are connected in sequence, an output end of the D/a module 211 is connected to the small signal output unit 26, and an output end of the FPGA module 212 is connected to the optical digital communication unit 22, the output unit 23, and the input unit 24, respectively.
In this embodiment, the control module 213 includes an ARM processor and a DSP processor that are connected to each other, where the ARM processor is connected to the FPGA module 212, and the DSP processor is connected to the communication module 214. The control module 213 completes calculation processing of all data through the ARM + DSP, and realizes cascade control of multiple sets of hardware devices (multiple-interval in-place line protection devices) through the communication module 214 (ethernet communication port or WIFI module) to the outside, thereby realizing infinite expansion of an output port; the MMS message communication of the optical digital communication unit 23, the output state control of the output unit 24 and the channel state acquisition of the input unit 25 are realized internally through the FPGA module 212, and the output of the small signal output unit 22 for outputting the 0-10V alternating voltage small signal is controlled through the D/A module 211.
In this embodiment, the small signal output unit 22 has 12 ac analog output channels, one small signal output unit 22 can cooperate with one power amplifier 3 to realize 6 ac voltages of 0 to 130V and 6 currents of 0 to 30A, one set of test system can be configured with no less than 3 small signal output units 22, multiple sets of small signal output units 22 can be cascaded and synchronously output with the aid of an external clock, so as to realize synchronous output of multiple power amplifiers 3, and ensure independent output control of analog acquisition signals of the multi-interval in-situ line protection device, thereby realizing batch synchronous automatic detection of the in-situ line protection device.
In this embodiment, the optical digital communication unit 23 has 10 optical fiber communication interfaces, has a switch forwarding function, and can perform MMS message communication with a multi-interval in-situ line protection device through an IEC61850 protocol under different IP addresses, actively acquire information such as a protection action fixed value, a pressing plate, an event report and the like of the in-situ line protection device at intervals, remotely modify the protection action fixed value, the pressing plate and the like of each interval in-situ line protection device, and assist an automatic test system to complete batch automatic detection of the in-situ line protection device.
In this embodiment, the output unit 24 includes 16 switching value contacts, and the output contacts adopt a relay structure, so that the circuit breaker position information can be independently provided for multi-interval local line protection in a mode of connecting a 220V dc power supply in series.
In this embodiment, the input unit 25 has 16 switching value contacts, the input contacts adopt an optical coupling structure, the closing and opening time does not exceed 100ns, the fast input contacts can timely subscribe to the positions of three-phase tripping outlets and reclosing outlets of the on-site line protection devices at different intervals, and the auxiliary test system completes batch automatic detection of the on-site line protection devices at multiple intervals.
In this embodiment, the power unit 26 is powered by an AC220 power source, which converts an AC power source into a 5V dc power source, and the 5V dc power source provides a power supply for other units.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A batch synchronous detection method for intelligent substation multi-interval in-situ line protection devices is characterized by comprising the following implementation steps:
1) the method comprises the following steps of setting up a test environment, connecting each spaced in-situ line protection device with a batch synchronous detection system respectively, wherein each spaced in-situ line protection device adopts an independent data source, the batch synchronous detection system comprises an upper computer (1) and a plurality of integrated electronic information output control devices (2), each integrated electronic information output control device (2) comprises an output interface, an input interface, an optical digital communication interface and a plurality of small signal output interfaces, the front ends of the small signal output interfaces are connected in series with a power amplifier (3), and the power amplifier (3) comprises a voltage output module and a current output module;
2) creating an execution case template base for batch synchronous detection according to a model base and a rule base which are preset based on a predictive control theory and used for batch synchronous detection, wherein the model base comprises the output quantity of each comprehensive electronic information output control device (2) and channel mapping between MMS messages output by local line protection devices at intervals, and the rule base comprises the output quantity of each comprehensive electronic information output control device (2) and comparison rules of the local line protection devices at intervals;
3) the batch synchronous detection system sequentially executes according to preset contents of execution cases in an execution case template library, simulates single-phase earth faults and interphase short-circuit faults of the on-site line protection devices at all intervals, simultaneously analyzes and judges the faults of the on-site line protection devices at different intervals in a closed-loop control mode, and acquires corresponding detection results;
4) and summarizing the test results of the local line protection devices of each interval and generating a detection report.
2. The batch synchronous detection method for the multi-interval in-place line protection devices of the intelligent substation according to claim 1, wherein the output quantity of each integrated electronic information output control device (2) in the model library comprises four categories of analog quantity voltage and current, output quantity position, input quantity acquisition and optical digital communication address, the instantiated processing establishes a corresponding analog quantity voltage and current example, output quantity position example, input quantity acquisition example and communication address example, the MMS message output by each interval in-place line protection device comprises four categories of telemeasurement, telesignaling, protection logic and MMS communication IP, the instantiated processing establishes a corresponding telemeasurement example, telesignaling example, protection logic example and communication IP example, and the analog quantity voltage and current example of each integrated electronic information output control device (2), Handshake mapping relations are established among the output position instance, the input acquisition instance, the communication address instance, the remote measurement instance, the remote signaling instance, the protection logic instance and the communication IP instance of the local line protection devices of all intervals.
3. The method of claim 1, wherein the rule base comprises: the consistency rule of the multi-interval in-place line protection voltage sampling channels comprises channel mapping between the voltage acquisition channels of the in-place line protection devices at intervals and the voltage output ports of the integrated electronic information output control equipment (2), and mapping between the voltage acquisition channels of the in-place line protection devices at intervals and a telemetering message sent to an upper computer (1); the consistency rule of the multi-interval in-place line protection current sampling channels comprises channel mapping between the current acquisition channels of the in-place line protection devices at intervals and the current output ports of the integrated electronic information output control equipment (2), and mapping between the current acquisition channels of the in-place line protection devices at intervals and a telemetering message sent to an upper computer (1); the sampling consistency rule of the positions of the multi-interval on-site line protection circuit breakers comprises channel mapping between circuit breaker position acquisition channels of the on-site line protection devices at intervals and output ports of the comprehensive electronic information output control equipment (2), and mapping between the circuit breaker position acquisition channels of the on-site line protection devices at intervals and remote signaling messages sent to an upper computer (1); the sampling consistency rule of the multi-interval in-place line protection trip outlet comprises channel mapping between the trip outlet of each interval in-place line protection device and the input port of each comprehensive electronic information output control device (2), and mapping between the trip outlet of each interval in-place line protection device and the protection action logic of the upper computer (1).
4. The batch synchronous detection method for the multiple-interval in-place line protection devices of the intelligent substation according to claim 1, wherein when fault analysis, judgment and corresponding detection results are obtained for the in-place line protection devices at different intervals in step 3), the processing step for the in-place line protection device at a certain interval i comprises: firstly, judging whether the local line protection device of the interval i successfully identifies the single-phase earth fault and the interphase short-circuit fault, if the single-phase earth fault and the interphase short-circuit fault cannot be successfully identified, judging that the local line protection device of the interval i is in an abnormal state Si _ N1 and recording abnormal contents, otherwise judging that the fault phase, the trip exit and the action time of the local line protection device of the interval i are correct, if not, judging that the local line protection device of the interval i is in an abnormal state Si _ N2 and recording abnormal contents, otherwise, judging that the local line protection device of the interval i is in a normal state Si _ N3, thereby obtaining the test result of the local line protection device of the interval i.
5. The method for synchronously detecting the batch of the multi-interval in-place line protection devices of the intelligent substation according to claim 1, wherein the step 4) further comprises the step of eliminating the defect of the in-place line protection device with abnormal state.
6. A batch synchronous detection system for applying the multi-interval in-place line protection device batch synchronous detection method of the intelligent substation according to any one of claims 1 to 5 is characterized by comprising an upper computer (1) and a plurality of integrated electronic information output control devices (2), wherein each integrated electronic information output control device (2) comprises an output interface, an input interface, an optical digital communication interface and a plurality of small signal output interfaces, the front ends of the small signal output interfaces are connected with power amplifiers (3) in series, and each power amplifier (3) comprises a voltage output module and a current output module.
7. The batch synchronous detection system according to claim 6, wherein the integrated electronic information output control device (2) comprises a core control unit (21), a small signal output unit (22), an optical digital communication unit (23), an output unit (24), an input unit (25) and a power supply unit (26), the core control unit (21) is respectively connected with the small signal output unit (22), the optical digital communication unit (23), the output unit (24) and the input unit (25), the output end of the power supply unit (26) is respectively connected with the core control unit (21), the small signal output unit (22), the optical digital communication unit (23), the output unit (24) and the input unit (25), and the small signal output unit (22) is provided with a plurality of small signal output interfaces.
8. The batch synchronous detection system according to claim 7, wherein the core control unit (21) comprises a D/A module (211), an FPGA module (212), a control module (213) and a communication module (214) which are connected in sequence, an output end of the D/A module (211) is connected with the small signal output unit (26), and an output end of the FPGA module (212) is connected with the optical digital communication unit (22), the output unit (23) and the input unit (24) respectively.
9. The batch synchronous detection system according to claim 6, wherein the core control unit (21) is integrated on a mother circuit board, and the small signal output unit (22), the optical digital communication unit (23), the output unit (24), the input unit (25) and the power supply unit (26) are all respectively inserted and installed on different daughter circuit boards on the mother circuit board.
10. The batch synchronous detection system according to claim 6, wherein the control module (213) comprises an ARM processor and a DSP processor connected with each other, wherein the ARM processor is connected with the FPGA module (212), and the DSP processor is connected with the communication module (214).
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