CN113295952B - Intelligent distributed FA function test method, system and storage medium - Google Patents
Intelligent distributed FA function test method, system and storage medium Download PDFInfo
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- CN113295952B CN113295952B CN202110566740.1A CN202110566740A CN113295952B CN 113295952 B CN113295952 B CN 113295952B CN 202110566740 A CN202110566740 A CN 202110566740A CN 113295952 B CN113295952 B CN 113295952B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G—PHYSICS
- 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
Abstract
The invention discloses an intelligent distributed FA function testing method, a system and a storage medium, wherein an intelligent distributed FA testing platform is constructed according to an application scene of intelligent distributed FA, the power grid topology of a power distribution network and testing requirements; acquiring voltage/current signals transmitted to a power grid topological line when different types of faults occur to a power distribution network under the actual application scene of intelligent distributed FA; the method comprises the steps of inputting a test platform into the distributed FA, sequentially inputting different types of corresponding time sequence working voltages/time sequence working currents to the test platform, obtaining the switching action condition of the intelligent distributed FA under the action of the different types of time sequence working voltages/time sequence working currents, and judging whether the intelligent distributed FA is qualified according to the action condition, so that whether the intelligent distributed FA meets the field operation requirement on functional application is scientifically and accurately verified.
Description
Technical Field
The invention relates to the technical field of distribution automation test, in particular to an intelligent distributed FA function test method, system and storage medium.
Background
The power distribution network is directly oriented to users and is distributed in all aspects of social production and life, and the high-quality reliable power supply of the power distribution network has direct correlation to the power supply quality of the users. With the development of social economy and the improvement of the living standard of people, the power distribution network is developing towards intellectualization, informatization and automation. Distribution automation is based on a distribution network primary network frame and equipment, technologies such as computers, information and communication are comprehensively utilized, and detection, control and rapid fault isolation of a distribution network are realized through information integration of related application systems, so that power supply reliability is improved, power supply quality is improved, and operation efficiency and benefits of the power network are improved. The distribution automation system is an automation system for realizing the operation monitoring and control of the distribution network, and has the functions of distribution network operation monitoring, graph and model management, feeder automation, distribution network operation state management and control and the like.
Feeder Automation (FA for short) is one of the important functions of a distribution network Automation system, and an Automation device or system is used for monitoring the operation condition of a distribution line in real time, finding line faults in time, positioning and isolating fault areas and recovering power supply to non-fault areas. The feeder automation construction mode can be divided into two modes of centralized feeder automation and on-site feeder automation, wherein the centralized feeder automation is realized by mutually matching a distribution automation system main station with a distribution automation terminal, and the on-site feeder automation is realized by mutually communicating, logically matching or time sequence matching through the terminals without depending on the distribution automation main station. The intelligent distributed FA is the in-situ feeder automation, realizes fault isolation and non-fault area restoration power supply through mutual cooperation of the distribution automation terminals, reports a processing result to the distribution automation master station system as required, has higher reliability because the processing result does not depend on master station communication, and can realize millisecond self-healing of the distribution network.
At present, an intelligent distributed FA function test method and system are not developed, but the intelligent distributed FA function test has an important meaning for reducing the failure probability and improving the power utilization reliability, so how to realize the science of the intelligent distributed FA function and accurate test become technical problems to be solved urgently by technical staff in the field.
Disclosure of Invention
The invention provides an intelligent distributed FA function testing method, a system and a storage medium, which are used for solving the technical problem of scientific and accurate testing of intelligent distributed FA functions which is not realized in the prior art.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an intelligent distributed FA function test method comprises the following steps:
constructing a test platform of the intelligent distributed FA according to an application scene of the intelligent distributed FA, the power grid topology of the power distribution network and test requirements;
acquiring different kinds of time sequence working voltages/time sequence working currents transmitted to the intelligent distributed FA when different kinds of faults occur to the power distribution network under the actual application scene of the intelligent distributed FA; different kinds of faults are in one-to-one correspondence with different kinds of time sequence working voltages/time sequence working currents;
putting the test platform into the intelligent distributed FA, and sequentially controlling the test platform to output time sequence working voltage/time sequence working current corresponding to different types to the intelligent distributed FA;
and acquiring the switching action condition of the intelligent distributed FA under the action of different kinds of time sequence working voltage/time sequence working current, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition.
Preferably, the different kinds of faults include: main line faults, bus and branch line faults, switch failure and planned maintenance.
Preferably, when the fault type is a fault of the main line, the bus and the branch line, the control test platform outputs the time sequence working voltage/time sequence working current corresponding to the fault of the main line, the bus and the branch line to the intelligent distributed FA, and the method specifically comprises the following steps:
the control test platform simulates normal work of the power distribution network, and sets an action current fixed value of the intelligent distributed FA according to the normal working voltage/normal working current of the equipment;
injecting corresponding time sequence working voltage/time sequence working current into an upstream switch of a simulation fault point corresponding to the main line fault, the bus fault and the branch line fault in the test platform, and collecting the switch action condition under the time sequence working voltage/time sequence working current.
Preferably, the method further comprises a contact point test after the fault, and comprises the following steps:
setting the initial positions of two or more contact points in the test platform as the switching-off state, and determining the switching-on time of the two or more contact points;
the control test platform simulates normal work of the power distribution network, and sets an action current fixed value of the intelligent distributed FA according to the normal working voltage/normal working current of the equipment;
injecting normal working voltage/current into the test platform, and delaying for a period of time;
injecting corresponding kinds of time sequence working voltage/time sequence working current into an upstream switch of a simulation fault point corresponding to a main line fault, a bus fault and a branch line fault in the test platform;
inputting a voltage loss signal to one side of a contact point of a system topology circuit, and simulating the voltage conditions of two sides of the contact point in a fault state;
and acquiring the switching action condition of the test platform, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition.
Preferably, after injecting a voltage loss signal at one side into the system topology line and simulating the voltage conditions at two sides of the contact point in the fault state, the method further comprises the following steps:
and injecting normal voltage and current signals again, setting the voltage loss time to be not less than the shortest switching time in all the contact points and not more than the longest switching time in all the contact points, simulating the scene that the switching time of the contact points is not reached and the normal operation state is recovered, and checking whether the switching of each contact point is correct or not.
Preferably, the switch failure fault comprises: the protection tripping pressure plate is fully put into, part of the protection tripping pressure plate is withdrawn, and the switch does not acquire one or the combination of any fault signals; the contact point test comprises the following steps: and the fault occurs again after the contact points are put into, the contact points are not put into and the contact points are transferred for operation.
Preferably, the method for judging whether the intelligent distributed FA is qualified or not according to the switch action condition comprises the following steps:
and judging whether the switch action condition is matched with the corresponding preset theoretical switch action condition, if so, judging to be qualified, and if not, judging to be unqualified.
Preferably, the test platform is a multi-power-supply multi-contact-point line topology system built by a plurality of ring net cages, and the line topology system comprises: the distributed DTU design mode is adopted, and the annular net cage comprises at least one public unit and a plurality of interval units, wherein the public unit does not directly participate in the intelligent distributed FA, and the interval units send the processing process and results to the public unit and report the processing process and results to the distribution automation master station through the public unit.
A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the above methods when the computer program is executed by the processor.
A computer storage medium having a computer program stored thereon, which when executed by a processor, performs the steps of any of the above methods.
The invention has the following beneficial effects:
1. the intelligent distributed FA function testing method comprises the steps of constructing an intelligent distributed FA testing platform according to an application scene of the intelligent distributed FA, the power grid topology of a power distribution network and testing requirements; the method comprises the steps of obtaining different kinds of time sequence working voltages/time sequence working currents which are transmitted to the intelligent distributed FA when the power distribution network has different kinds of faults in the actual application scene of the intelligent distributed FA; different kinds of faults are in one-to-one correspondence with different kinds of time sequence working voltages/time sequence working currents; connecting the intelligent distributed FA with a test platform, and sequentially controlling the test platform to output time sequence working voltage/time sequence working current corresponding to different types to the intelligent distributed FA; the method comprises the steps of obtaining the switching action condition of the intelligent distributed FA under the action of different kinds of time sequence working voltage/time sequence working current, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition, so that whether the intelligent distributed FA meets the field operation requirement on function application or not is scientifically and accurately verified, the rapid positioning and isolation of the fault of the power distribution network and the power transfer and recovery of a non-fault area are realized, and the application problem of the intelligent distributed FA in the fault self-recovery of the power distribution network is solved.
2. In the preferred scheme, the intelligent distributed FA function testing method can realize the rapid positioning and isolation of the power distribution network fault and the power transfer and recovery of a non-fault area without human intervention, reduce the power failure range and the power failure time, minimize or avoid the power supply interruption of a user, greatly improve the power supply reliability, improve the power supply quality, improve the power grid operation efficiency and realize the self-healing of the power distribution network.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a simplified flow diagram of a method for testing intelligent distributed FA functions according to the present invention;
FIG. 2 is a topology diagram of a line topology system in a preferred embodiment of the present invention;
fig. 3 is a simplified flow chart of the intelligent distributed FA function testing method in the preferred embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment discloses an intelligent distributed FA function testing method, which includes the following steps:
constructing a test platform of the intelligent distributed FA according to an application scene of the intelligent distributed FA, the power grid topology of the power distribution network and test requirements;
the method comprises the steps of obtaining different kinds of time sequence working voltages/time sequence working currents which are transmitted to the intelligent distributed FA when the power distribution network has different kinds of faults in the actual application scene of the intelligent distributed FA; different kinds of faults are in one-to-one correspondence with different kinds of time sequence working voltages/time sequence working currents;
connecting the intelligent distributed FA with a test platform, and sequentially controlling the test platform to output time sequence working voltage/time sequence working current corresponding to different types to the intelligent distributed FA;
and obtaining the switching action condition of the intelligent distributed FA under the action of different kinds of time sequence working voltage/time sequence working current, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition.
In addition, in the embodiment, a computer system is also disclosed, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the steps of any one of the methods described above are implemented.
Furthermore, in the present embodiment, a computer storage medium is also disclosed, on which a computer program is stored, which when executed by a processor implements the steps in any of the methods described above.
According to the intelligent distributed FA function testing method, an intelligent distributed FA testing platform is constructed according to the application scene of the intelligent distributed FA, the power grid topology of the power distribution network and testing requirements; the method comprises the steps of obtaining different kinds of time sequence working voltages/time sequence working currents which are transmitted to the intelligent distributed FA when the power distribution network has different kinds of faults in the actual application scene of the intelligent distributed FA; different kinds of faults are in one-to-one correspondence with different kinds of time sequence working voltages/time sequence working currents; connecting the intelligent distributed FA with a test platform, and sequentially controlling the test platform to output time sequence working voltage/time sequence working current corresponding to different types to the intelligent distributed FA; the method comprises the steps of obtaining the switching action condition of the intelligent distributed FA under the action of different kinds of time sequence working voltage/time sequence working current, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition, so that whether the intelligent distributed FA meets the field operation requirement on function application or not is scientifically and accurately verified, the rapid positioning and isolation of the fault of the power distribution network and the power transfer and recovery of a non-fault area are realized, and the application problem of the intelligent distributed FA in the fault self-recovery of the power distribution network is solved.
Example two:
the second embodiment is the preferred embodiment of the first embodiment, and the difference between the first embodiment and the second embodiment is that the specific steps of the intelligent distributed FA function testing method are detailed:
in order to explore the demonstration effect of 'zero flicker' of power supply in an A + area and assist the intelligent development of urban distribution networks, the invention provides an intelligent distributed FA function test method, which is used for verifying whether intelligent distributed FA meets the field operation requirement on function application, realizing the rapid positioning and isolation of faults of a distribution network and the power supply and restoration of a non-fault area, and solving the application problem of the intelligent distributed FA in the fault self-restoration of the distribution network, and the embodiment discloses the intelligent distributed FA function test method which comprises the following steps:
the method comprises the following steps: constructing a test platform of the intelligent distributed FA according to the application scene of the intelligent distributed FA, the power grid topology of the power distribution network and the test requirement; wherein, test platform is the many circuit topology system of power multi-contact point who is built by a plurality of ring box with a net, and wherein, topology system mainly includes: the looped netowrk case adopts distributed DTU design mode, contains 1 public unit, 4 or 6 interval units. The public unit does not directly participate in the intelligent distributed FA, and the interval unit sends the processing process and the result to the public unit and reports the processing process and the result to the distribution automation main station through the public unit.
Step two: acquiring different kinds of time sequence working voltages/time sequence working currents transmitted to the intelligent distributed FA when different kinds of faults occur to the power distribution network under the actual application scene of the intelligent distributed FA; different kinds of faults correspond to different kinds of time sequence working voltages/time sequence working currents one to one.
Step three: connecting the intelligent distributed FA with a test platform, and sequentially controlling the test platform to output time sequence working voltage/time sequence working current corresponding to different types to the intelligent distributed FA;
wherein the different kinds of faults include: any one or combination of a plurality of main line faults, bus and branch line faults, switch failure faults and planned maintenance. Switch failure faults include: the protection tripping pressure plate is fully switched on, the partial protection tripping pressure plate is withdrawn, and the switch does not acquire one or any combination of fault signals.
When the fault type is a main line fault, a bus fault and a branch line fault, controlling the test platform to output a time sequence working voltage/time sequence working current corresponding to the main line fault, the bus fault and the branch line fault to the intelligent distributed FA, and specifically comprising the following steps:
the control test platform simulates normal work of the power distribution network, outputs normal working voltage/normal working current to the intelligent distributed FA, and collects action current constant values of the intelligent distributed FA under the action of the normal working voltage/normal working current;
and injecting corresponding types of time sequence working voltage/time sequence working current into an upstream switch of a simulated fault point corresponding to the faults of the main line, the bus and the branch line of the test platform, and collecting the switch action condition under the time sequence working voltage/time sequence working current.
In addition, still include the contact point test after the trouble takes place, wherein, contact point test includes: and one or a combination of any more of the contact point investment, the contact point non-investment and the contact point failure after the contact point is transferred for operation.
The contact point test comprises the following steps:
setting the initial positions of two or more contact points in the test platform as the brake-off state, and determining the transfer time of the two or more contact points;
the control test platform simulates the normal work of the power distribution network, and sets an action current fixed value of the intelligent distributed FA according to the normal working voltage/normal working current of the equipment;
injecting normal working voltage/current into the test platform, and delaying for a period of time;
injecting corresponding kinds of time sequence working voltage/time sequence working current into an upstream switch of a simulation fault point corresponding to a main line fault, a bus fault and a branch line fault in the test platform;
inputting a voltage loss signal to one side of a contact point of a system topology circuit, and simulating the voltage conditions of two sides of the contact point in a fault state;
and acquiring the switching action condition of the test platform, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition.
Injecting a voltage loss signal at one side into a system topology line, and after simulating the voltage conditions at two sides of a contact point in a fault state, the method further comprises the following steps:
and injecting normal voltage and current signals again, setting the voltage loss time to be not less than the shortest switching time in all the contact points and not more than the longest switching time in all the contact points, simulating the scene that the switching time of the contact points is not reached and the normal operation state is recovered, and checking whether the switching of each contact point is correct or not.
Step four: and acquiring the switching action condition of the intelligent distributed FA under the action of different kinds of time sequence working voltage/time sequence working current, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition.
Specifically, the method for judging whether the intelligent distributed FA is qualified or not according to the switch action condition comprises the following steps:
and judging whether the switch action condition is matched with the corresponding preset theoretical switch action condition, if so, judging to be qualified, and if not, judging to be unqualified.
Whether the intelligent distributed FA is qualified or not is judged based on a function test result, distributed FA switch tripping logic, contact point transfer logic and the like are analyzed, whether the logic meets the field use requirement or not and whether potential safety hazards exist or not are determined, the safety and the stability of the actual operation of the distributed FA are guaranteed, whether the switch tripping logic, the contact point self-adaptive logic, the contact point transfer logic and the like are correct or not is mainly analyzed, the location and the isolation of a fault area are guaranteed, power supply is recovered in a non-fault area, and millisecond self-healing is achieved.
The third embodiment is a preferred embodiment of the second embodiment, and is different from the second embodiment in that various methods for testing faults are refined:
in this embodiment, as shown in fig. 3, an intelligent distributed FA function testing method is disclosed, which includes the following steps:
the method comprises the following steps: a circuit topology system of three power supplies and two contact points is built through the 5-ring net cage, communication is guaranteed, power supply is normal, and wiring is accurate; the line topology system is a three-power-supply two-contact line topology system built by 5 ring net cages as shown in fig. 2, wherein 1L01,1L02,2L01,2L 04, 3L01, 3L02, 4L01, 4L02 and 5L01 are bus switches, 1L03, 1L04, 2L03, 3L04, 4L03, 4L04, 5L03 and 5L04 are branch switches, and 2L02 and 5L02 are self-adaptive contact points
Step two: setting the fixed value of the intelligent distributed FA action current to be 5A, respectively carrying out fault simulation tests on a main line, a bus and branch lines of the distribution line under different running states, and checking the action condition of a switch;
the fault simulation test specifically comprises the following steps:
1. branch line failure:
1.1 scenario 1:2L03 spur fault
The test method comprises the following steps:
(1) Normally charging the built line topology system for 20s;
(2) 1L01,1L02,2L01,2L03 apply fault current of 5.25A, the fault current time is set to be 40ms, and the pressure plate is fully put into operation;
and (3) action results: the switch 2L03 trips;
and (4) analyzing results: the fault is positioned at the downstream of the switch 2L03, and after the 2L03 detects fault current, the switch trips;
1.2 scenario 2:2L03 branch line fault, current constant value setting error
The test method comprises the following steps:
(1) Normally charging the built line topology system for 20s;
(2) Setting a branch fault action current constant value to be 10A, and simulating a system operation mode under the condition of wrong current constant value setting;
(3) 1L01,1L02,2L01,2L03 apply fault current of 5.25A, the fault current time is set to be 40ms, and the pressure plate is fully put into operation;
and (4) action results: 2L01 and 2L04 action tripping;
and (4) analyzing results: the fault position is positioned at the downstream of the switch 2L03, but the fault current (5.25A) does not exceed the fault current constant value (10A) of the branch line, the 2L03 does not act, and the system considers that the No. 2 ring main unit bus has a fault, 2L01 and 2L04 act;
1.3 scenario 3:2L03 branch line fault, protection tripping pressure plate partial exit
The test method comprises the following steps:
(1) Normally charging the built line topology system for 20s;
(2) 1L01,1L02,2L01,2L03 applies fault current of 5.25A, the time of the fault current is set to 40ms, and 2L03 protects the tripping pressure plate from withdrawing;
and (3) action results: 2l01,2l04 action trip;
and (4) analyzing results: the branch switch protects the tripping pressure plate to withdraw, and sends a signal of refusing to operate to the previous switch, and the previous switch operates to trip;
2. main line fault (disregarding contact points)
2.1 scenario 4:1L02-2L01 Main line Fault
The test method comprises the following steps:
(1) Normally charging the built circuit topology system for 20s;
(2) 1L01,1L02 apply fault current of 5.25A, the fault current time is set to 40ms, and the pressure plate is fully put into operation;
and (3) action results: 1L02,2L01 switch tripping;
and (4) analyzing results: the fault is positioned between the switches 1L02 and 2L01, the 1L02 detects fault current, one side sends out a fault signal, the other side does not send out the fault signal, the switch 1L02 operates to trip, and a fault removal success signal is sent out; when the 2L02 detects that one side sends out a fault signal, the other side does not send out, the switch 2L01 acts to trip, and a fault isolation success signal is sent out;
2.2 scenario 5:1L02-2L01 mainline fault, 1L02 protection tripping operation pressing plate exit
The test method comprises the following steps:
(1) Normally charging the built line topology system for 20s;
(2) 1L01 and 1L02 apply fault current of 5.25A, the time of the fault current is set to 40ms, and 1L02 protects the tripping pressure plate from withdrawing;
and (3) action results: 1L01,2L01 switch tripping;
and (4) analyzing results: the fault position is between the switches 1L02-2L01, and the switches 1L01 and 2L01 are tripped because the 1L02 pressure plate is withdrawn, the 1L02 refuses to move and the upper-stage switch is tripped;
2.3 scenario 6:1L02-2L01 mainline fault, 2L01 protection tripping pressure plate exit
The test method comprises the following steps:
(1) Normally charging the built circuit topology system for 20s;
(2) 1L01 and 1L02 apply fault current of 5.25A, the time of the fault current is set to 40ms, and the pressing plate 2L01 is withdrawn;
and (3) action results: 1L02,2L02 and 2L04 switches are tripped;
and (4) analyzing results: the fault is positioned between the switches 1L02-2L01, and the switches 1L02,2L02 and 2L04 are tripped because the 2L01 pressure plate is withdrawn, the 2L02 refuses to move and the upper-stage switch is tripped;
3. main line fault (consider contact point)
3.1 scenario 7:1L02-2L01 Main line Fault-1
The test method comprises the following steps:
(1) Normally charging the built circuit topology system for 20s;
(2) 2L02 is set as a connection point, the transfer time is set as 0.5s,5L02 is set as a connection point, the transfer time is set as 0.3s, and the initial state of the switch is off;
(3) 1L01 and 1L02 apply fault current of 5.25A, and the pressing plate is fully put into operation; applying a single-side voltage loss signal for 5s after the fault current is input for 40 milliseconds;
and (4) action results: 1L02,2L01 trip, 2L02, 5L02 switch-on;
and (4) analyzing results: when the 2L02 and the 5L02 are in a normal operation state, namely pressure is applied to two sides, the switch is in a brake separating position, and the 2L02 and the 5L02 are self-adaptive to be contact points; the fault position is located between the switches 1L02-2L01, 1L02,2L01 are tripped, 2L02 and 5L02 receive 2L01 isolation success and single-side voltage loss signals, the voltage loss time exceeds the set transfer time, and 2L02 and 5L02 are switched on. The result of the test method in the scene accords with the switch action logic, but the test result can generate loop closing;
3.2 scene 8:1L02-2L01 Main line Fault-2
The test method comprises the following steps:
(1) Normally charging the built line topology system for 20s;
(2) 2L02 is set as a connection point, the supply transfer time is set as 0.3s,5L02 is set as a connection point, the supply transfer time is set as 0.5s, and the switch is in an initial state of disconnection;
(3) 1L01 and 1L02 apply fault current of 5.25A, and the pressing plate is fully put into use; applying a single-side voltage loss signal after the fault current is input for 40ms, wherein the voltage loss time is 0.4s;
(4) Charging normally for 20s again
And (4) action results: 1L02,2L01 trip and 2L02 close;
and (4) analyzing results: when the 2L02 and the 5L02 are in a normal operation state, namely pressure is applied to two sides, the switch is in a brake separating position, and the 2L02 and the 5L02 are self-adaptive to be contact points; the fault is positioned between the switches 1L02-2L01, 1L02,2L01 are tripped, 2L02 receives a 2L01 isolation success signal, and a single-side voltage loss signal, the voltage loss time exceeds the set switching time, and 2L02 is switched on.
3.3 scene 9:1L02-2L01 Main line Fault-3
The test method comprises the following steps:
(1) Normally charging the built circuit topology system for 20s;
(2) 2L02 is set as a connection point, the transfer time is set as 0.5s,5L02 is set as a connection point, the transfer time is set as 0.3s, and the switch is in an initial state of disconnection;
(3) 1L01 and 1L02 apply fault current of 5.25A, and the pressing plate is fully put into operation; applying a single-side voltage loss signal for 0.4s after the fault current is input for 40 ms;
(4) Charging normally for 20s again
And (4) action results: 1L02,2L01 tripping and 5L02 closing;
and (4) analyzing results: when the 2L02 and the 5L02 are in a normal operation state, namely pressure is applied to two sides, the switch is in a brake separating position, and the 2L02 and the 5L02 are self-adaptive to be contact points; the fault position is positioned between the switches 1L02-2L01, 1L02,2L01 are tripped, 5L02 receives a 2L01 isolation success and single-side voltage loss signal, and exceeds the set switching time, and 5L02 is switched on;
4. main line fault (supply transfer type lower)
4.1 scenario 10: maintaining the 5L02-2L04 main line fault in the switching state after 3.3 occurrences;
the test method comprises the following steps:
(1) Keeping the switching state after 3.3 occurrences, namely 1L02,2L01 tripping and 5L02 closing;
(2) Normally charging the built circuit topology system for 20s;
(3) 4L01, 4L02, 5L01 and 5L02 apply fault current of 5.25A, the pressing plate is fully put into operation, and the fault current time is 40 milliseconds;
(4) Applying a single-side voltage loss signal for 5s;
and (3) action results: 2L04, 5L02 trip, 2L02 close;
and (4) analyzing results: when the 2L02 is in a normal operation state, namely pressure is applied to two sides, the switch is in a brake separating position, and the 2L02 is self-adaptive to be a contact point; 5L02-2L04 line fault, 2L04, 5L02 trip; 2L02 receives the 2L04 isolation success signal, and the voltage is lost on one side, the voltage loss time exceeds the switching time of the voltage loss time, and the 2L02 is switched on;
5. bus fault
5.1 scene 11: no. 2 ring main unit bus fault (disregard contact point)
The test method comprises the following steps:
(1) Normally charging the built line topology system for 20s;
(2) 1L01,1L02 and 2L01, applying a fault current of 5.25A, setting the fault current time to be 40ms, and fully inputting a pressure plate;
and (4) action results: 2, tripping the ring main boxes 2L01,2L02 and 2L04;
and (4) analyzing results: the fault is positioned on a bus of the No. 2 ring main unit, one side of each of the switches 2L01,2L02 and 2L04 receives a fault signal, the other side does not receive the fault signal, and the switch acts to trip;
5.2 scene 12: the bus of the ring main unit No. 2 has a fault, and the 2L01 pressure plate exits (without considering a contact point);
the test method comprises the following steps:
(1) Normally charging the built line topology system for 20s;
(2) 1L01,1L02 and 2L01 apply fault current of 5.25A, the time of the fault current is set to 40ms, and the 2L01 protection tripping pressure plate is withdrawn;
and (3) action results: 1L02,2L02, 2L04;
and (4) analyzing results: the fault is positioned on a No. 2 ring main unit bus, one side of each of the switches 2L02 and 2L04 receives a fault signal, the other side does not receive the fault signal, the switch action trips, the 2L01 pressing plate exits, the upper stage of switch acts, and the 1L02 trips;
5.3 scene 13: no. 1 ring main unit bus fault (consider contact point)
The test method comprises the following steps:
(1) Normally charging the built line topology system for 20s;
(2) 2L02 is set as a connection point, the supply transfer time is set as 0.3s,5L02 is set as a connection point, the supply transfer time is set as 0.5s, and the switch is in an initial state of disconnection;
(3) 1L01, applying fault current of 5.25A, and putting a pressing plate into full operation; applying a single-side voltage loss signal for 0.4s after the fault current is input for 40 milliseconds;
(4) Normally charging for 20s again;
and (3) action results: 1L01,1L02 tripping and 2L02 closing;
and (4) analyzing results: when the 2L02 and the 5L02 are in a normal operation state, namely pressure is applied to two sides, the switch is in a brake separating position, and the 2L02 and the 5L02 are self-adaptive to be contact points; the fault is located on a bus of the ring main unit No. 1, 1L01 and 1L02 trip, and 2L02 is switched on after the fault receives a 1L02 isolation success signal because 2L02 is a contact point;
step three: based on the function test result, analyzing the tripping logic of the distributed FA switch, the switching logic of the contact points and the like, determining whether the logic meets the field use requirement and whether potential safety hazards exist, and ensuring the safety and stability of the actual operation of the distributed FA.
Through the analysis of the fault simulation test scenes of 1 to 5, it can be clear that: (1) fault removal logic: the switch detects fault current, and the switch acts when the fault current is detected and only one side of the switch does not send a fault signal; (2) fault isolation logic: the switch does not detect a fault, only one switch node on two sides sends out a fault signal, and the switch acts; (3) the contact point adaptation logic is: the switch is in a brake-separating state, the two sides of the switch are provided with pressure, and the switch is self-adaptive to be a connection point; and (4) the contact point trip logic is as follows: and when the voltage loss of the single side is detected and a fault isolation success signal is received, the contact point performs delayed action.
In summary, the intelligent distributed FA function testing method of the present invention constructs the intelligent distributed FA testing platform according to the application scenario of the intelligent distributed FA, the power grid topology of the power distribution network to which the intelligent distributed FA belongs, and the testing requirements; acquiring different kinds of time sequence working voltages/time sequence working currents transmitted to the intelligent distributed FA when the power distribution network has different kinds of faults in the actual application scene of the intelligent distributed FA; the different kinds of faults are in one-to-one correspondence with the different kinds of time sequence working voltages/time sequence working currents; connecting the intelligent distributed FA with the test platform, and sequentially controlling the test platform to output the time sequence working voltage/time sequence working current corresponding to different types to the intelligent distributed FA; the method comprises the steps of obtaining the switching action condition of the intelligent distributed FA under the action of different kinds of time sequence working voltage/time sequence working current, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition, so that whether the intelligent distributed FA meets the field operation requirement on functional application or not is scientifically and accurately verified, the rapid positioning and isolation of the fault of the power distribution network and the power supply and recovery of a non-fault area are realized, and the application problem of the intelligent distributed FA in the self-recovery of the fault of the power distribution network is solved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An intelligent distributed FA function testing method is characterized by comprising the following steps:
constructing a test platform of the intelligent distributed FA according to the application scene of the intelligent distributed FA, the power grid topology of the power distribution network and test requirements;
acquiring different kinds of time sequence working voltages/time sequence working currents transmitted to the intelligent distributed FA when the power distribution network has different kinds of faults in the actual application scene of the intelligent distributed FA; the different kinds of faults are in one-to-one correspondence with the different kinds of time sequence working voltages/time sequence working currents;
putting the test platform into an intelligent distributed FA, and sequentially controlling the test platform to output the time sequence working voltage/time sequence working current corresponding to different types to the intelligent distributed FA;
acquiring the switching action condition of the intelligent distributed FA under the action of different kinds of time sequence working voltage/time sequence working current, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition;
the method comprises the following steps of testing the contact point after the fault:
setting the initial positions of two or more contact points in the test platform as a brake-off state, and determining the transfer time of the two or more contact points;
controlling the test platform to simulate the normal work of the power distribution network, and setting an action current fixed value of the intelligent distributed FA according to the normal working voltage/normal working current of the equipment;
injecting normal working voltage/current into the test platform, and delaying for a period of time;
injecting corresponding kinds of time sequence working voltage/time sequence working current into an upstream switch of a simulation fault point corresponding to the main line fault, the bus fault and the branch line fault of the test platform;
inputting a voltage loss signal to one side of a contact point of a system topology circuit, and simulating the voltage conditions of two sides of the contact point in a fault state;
and acquiring the switching action condition of the test platform, and judging whether the intelligent distributed FA is qualified or not according to the switching action condition.
2. The intelligent distributed FA functionality testing method according to claim 1, wherein the different kinds of failures include: main line faults, bus and branch line faults, switch failure, and planned maintenance.
3. The intelligent distributed FA function testing method according to claim 2, wherein when the types of the faults are main line, bus line and branch line faults, the testing platform is controlled to output the timing sequence working voltage/timing sequence working current corresponding to the main line, bus line and branch line faults to the intelligent distributed FA, and the method specifically comprises the following steps:
controlling the test platform to simulate the normal work of the power distribution network, and setting an action current fixed value of the intelligent distributed FA according to the normal working voltage/normal working current of the equipment;
and injecting corresponding time sequence working voltage/time sequence working current into an upstream switch of a simulated fault point corresponding to the main line fault, the bus fault and the branch line fault in the test platform, and collecting the switch action condition under the time sequence working voltage/time sequence working current.
4. The intelligent distributed FA function testing method according to claim 3, wherein after injecting a side voltage loss signal into a system topology line and simulating voltage conditions at two sides of a contact point in a fault state, the method further comprises the following steps:
and injecting normal voltage and current signals again, setting the voltage loss time to be not less than the shortest transfer time of all the contact points and not more than the longest transfer time of all the contact points, simulating a scene that the transfer time of the contact points is not reached and the normal operation state is recovered, and checking whether the transfer of each contact point is correct or not.
5. The intelligent distributed FA functionality testing method of claim 4, wherein the switch failure fault comprises: the protection tripping pressure plate is fully put into, part of the protection tripping pressure plate is withdrawn, and the switch does not acquire one or the combination of any fault signals; the contact point test comprises: and the fault occurs again after the contact point is put into operation, the contact point is not put into operation and the contact point is transferred to operation.
6. The intelligent distributed FA function testing method according to claim 1, wherein the step of judging whether the intelligent distributed FA is qualified according to the switch action condition comprises the steps of:
and judging whether the switching action condition is matched with the corresponding preset theoretical switching action condition, if so, judging to be qualified, and if not, judging to be unqualified.
7. The intelligent distributed FA function testing method according to claim 1, wherein the testing platform is a multi-power multi-contact-point line topology system built by a plurality of ring cages, and the line topology system comprises: the distributed DTU design mode is adopted, the ring net cage comprises at least one public unit and a plurality of interval units, wherein the public unit does not directly participate in the intelligent distributed FA, and the interval units send processing processes and results to the public unit and report the processing processes and results to the distribution automation main station through the public unit.
8. A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of any of the preceding claims 1 to 7 are performed when the computer program is executed by the processor.
9. A computer storage medium on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the steps of the method of any one of the preceding claims 1 to 7.
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