CN113541093B

CN113541093B - Intelligent distributed feeder automation function test method for power distribution terminal

Info

Publication number: CN113541093B
Application number: CN202111089986.0A
Authority: CN
Inventors: 高明
Original assignee: Jiangsu Daye Intelligent Electrical Co ltd
Current assignee: Jiangsu Daye Intelligent Electrical Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2021-12-24
Anticipated expiration: 2041-09-17
Also published as: CN113541093A

Abstract

The invention discloses an intelligent distributed feeder automation function test method of a power distribution terminal, which comprises the steps of obtaining set information of fault types to be tested; determining an electrical quantity state sequence aiming at a switch according to the type of the fault to be tested and the position of a matched switch of the tested terminal, and providing the electrical quantity required for testing the distributed FA function to the tested terminal according to the electrical quantity state sequence; the tested terminal completes a distributed FA requirement fault clearing action, a protection tripping action for isolating the fault or an automatic switching-on action for recovering the power supply requirement according to the obtained electrical quantity and the GOOSE signal associated with the fault type; and comparing the distributed FA action behavior determined by the test model with the actual action behavior of the tested terminal, wherein the distributed FA action behavior and the actual action behavior of the tested terminal are consistent, and judging that the action of the tested terminal is correct when the tested terminal processes the fault type. The advantages are that: the distributed FA function joint debugging of the power distribution terminal and the ring net cage or the switch station can be completed quickly, and an active effect is played for promoting the application of the distributed FA function in a power grid.

Description

Intelligent distributed feeder automation function test method for power distribution terminal

Technical Field

The invention relates to an intelligent distributed feeder automation function test method for a power distribution terminal, and belongs to the technical field of power distribution terminal product test.

Background

At present, both southern power grids and national power grids greatly promote the application of power distribution terminals (terminals for short) with distributed FA (distributed feeder automation) functions, and are very beneficial to improving the power supply reliability of distribution lines and reducing the line fault and power failure time.

Distributed FA testing of terminals is an extremely important and labor intensive technical task. When the terminal is used for network access detection, special detection, installation and debugging, the fault processing function and logic of the distributed FA are required to be tested, and the purpose is to detect the correctness of the distributed FA function logic of the terminal and the correctness of the distributed FA parameter and fixed value configuration.

The currently adopted test methods mainly comprise the following two modes:

the method is characterized in that an RTDS real-time digital simulation system and a plurality of terminals are adopted to build a test environment, the RTDS real-time digital simulation system applies electric quantity to each terminal through a digital simulation model which is compiled in advance, and the correctness of the distributed FA function, the fixed value and the parameter configuration of the terminal is judged by detecting the protective tripping and automatic switching-on behaviors of the terminal.

And the second mode is to design a special test system (comprising a plurality of relay protection testers and test software) and a plurality of terminals to set up a test environment for testing. The testing software applies electric quantity to each terminal by coordinately controlling each relay protection tester, and judges the correctness of the distributed FA function, the fixed value and the parameter configuration of the terminal by detecting the terminal protection tripping action and the automatic closing action.

The two test systems have the advantages that the line faults of the terminal product at different points of the 10kV line can be simultaneously tested, and the real running state is relatively close. But suffers from the following significant disadvantages:

the RTDS test system has high cost, and the special test system has low cost because a plurality of relay protection testers and matched test tools are needed; the built test environment is complex, and a test model which is consistent with the engineering project line is inconvenient to build; various distributed FA logic tests cannot be carried out on a single terminal; it is not portable. When the terminal needs to be replaced and overhauled on the live-line running 10kV line on site, the distributed FA function test cannot be carried out on the site.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide an intelligent distributed feeder automation function test method for a power distribution terminal.

In order to solve the technical problem, the invention provides an intelligent distributed feeder automation function testing method for a power distribution terminal, which comprises the following steps:

step A: acquiring the setting information of the fault type to be tested;

and B: determining an electrical quantity state sequence aiming at a switch according to setting information of a fault type to be tested and the position of a matched switch of a tested terminal at a primary wiring diagram, and providing electrical quantity required by testing for the tested terminal according to the electrical quantity state sequence;

and C: setting GOOSE signal state sequences of other terminals according to the setting information of the fault type to be tested and the position of a matched switch of the tested terminal, and simulating the other terminals to generate GOOSE signals associated with the fault type;

step D: simulating the actions of fault removal and fault isolation protection tripping actions required by distributed feeder automation or automatic switching actions required by power supply restoration according to the electrical quantity state sequence of the switch, the GOOSE signal state sequences of other terminals and the positions of the detected terminals in a primary wiring diagram;

step E: the tested terminal completes fault removal, fault isolation protective tripping action or automatic switching-on action required by power supply restoration according to the electrical quantity provided by the step B and the GOOSE signal associated with the fault type;

step F: comparing the consistency of the actions generated in the step D and the step E, judging that the action is correct when the tested terminal processes the fault type in the step A, and otherwise, judging that the action is incorrect;

and the other terminals are power distribution terminals except the tested terminal in the power distribution line.

Furthermore, in the primary wiring diagram, only one power distribution terminal is configured as a tested terminal at the same time.

Further, the method further comprises:

acquiring primary wiring information and measured terminal information of a distribution line where a measured terminal is located;

generating a test model according to the primary wiring information of the distribution line where the tested terminal is located and the tested terminal information, wherein the test model comprises a primary wiring diagram of the distribution line where the tested terminal is located, an electrical quantity state sequence applied to the tested terminal and a GOOSE signal state sequence simulating other terminals of the distribution line where the tested terminal is located, and the primary wiring diagram is used for simulating, controlling and displaying the tripping or closing behaviors of the tested terminal or other terminal matched switches.

Further, the determining that the action of the terminal under test when processing the fault type is correct includes:

setting the closing state of the switch after the distributed feeder automation of the tested terminal correctly acts according to the electrical quantity state sequence and the action time range of the complete set of switch through a test model;

the tested terminal meets the requirement of the distributed feeder automation action, generates state deflection consistent with the set on-position state of the test model in the specified time, and judges that the distributed feeder automation test logic is correct.

Further, the electrical quantity state sequence applied to the tested terminal is provided with a state switching trigger condition, including:

the time trigger condition is used for outputting the set electrical quantity of the current state when the current state is reached, and switching to the next state sequence when the time delay reaches the set time;

the switching-in triggering condition is used for outputting the set electrical quantity of the current state when the current state is in the current state, receiving the appointed switching-in signal and switching to the next state sequence;

and the time or starting triggering condition is used for outputting the set electrical quantity of the state when the state is in the state, and switching to the next state sequence when any condition that the delay reaches the set time or a specified starting signal is received is met.

Further, the generation of the electrical quantity state sequence applied to the tested terminal includes:

determining configuration information of an electric quantity state sequence of a tested terminal according to a fault type to be tested and a primary wiring diagram of a distribution line corresponding to a switch of the tested terminal, configuring the configuration information to a switch primitive corresponding to the tested terminal on the primary wiring diagram, controlling a relay protection tester to apply electric quantity to the tested terminal by a test model according to the configuration information of the electric quantity state sequence, and performing distributed feeder automation logic test;

the configuration information of the electrical quantity state sequence comprises a first configuration and a second configuration;

the first configuration comprises the following steps:

the state sequence 1 represents a state before a fault, the electric quantity of the state sequence 1 is set as a current value and a voltage value before the fault, the state switching condition of the state sequence 1 is time trigger, and the time-triggered maintenance time before the fault is t 1;

the state sequence 2 represents a state during fault, the electrical quantity of the state sequence 2 is set as a current value and a voltage value during fault, the state switching condition of the state sequence 2 is time trigger or opening trigger, the fault maintaining time of the time trigger is t2, and the opening trigger is that the switch is in a brake separating position;

a state sequence 3 which represents a state after fault removal, wherein the electrical quantity of the state sequence 3 is set as a current value and a voltage value after fault removal, the state switching condition of the state sequence 3 is time trigger, and the maintenance time after fault removal of the time trigger is t 3;

the state sequence 4 represents a state after power supply recovery, the electrical quantity of the state sequence 4 is set as a current value and a voltage value after power supply recovery, the state switching condition of the state sequence 4 is time trigger, and the power supply recovery maintaining time of the time trigger is t 4;

the second configuration comprises:

a state sequence 2 which represents a fault-time state, wherein the electrical quantity of the state sequence 2 is set as a fault-time current and voltage value, the state switching condition of the state sequence 2 is time trigger, and the fault maintenance time of the time trigger is t 2;

the state sequence 3 represents a state after fault removal, the electrical quantity of the state sequence 3 is set as a current value and a voltage value after fault removal, the state switching condition of the state sequence 3 is time triggering or opening triggering, the time-triggered maintenance time after fault removal is t3, and the opening triggering is that the switch is in a switching-on position;

if the terminal to be tested has direct intra-area faults, setting the terminal to be tested according to the state sequence 1-3 in the configuration I;

the terminal to be tested is located at the direct downstream close to the line fault and is set according to the state sequence 1-4 in the configuration I;

and if the tested terminal is associated with the interconnection switch in the primary wiring diagram, and the interconnection switch is in a brake separating position, setting according to the state sequence 1-the state sequence 4 of the configuration two.

Further, the generating of the electrical quantity state sequence applied to the tested terminal includes:

and editing and storing the electrical quantity state sequence in a file mode, and importing the edited and stored file during testing to generate a corresponding electrical quantity state sequence for the tested terminal.

Further, before the test is carried out, switch on-position information related to the tested terminal is obtained, if the switch on-position information does not accord with the initial state sequence requirement of the electrical quantity state sequence generated after the file is imported, a switch on-position signal is automatically alarmed, and switching-on and switching-off operation of the switch related to the tested terminal is prompted.

Further, the pre-fault maintaining time t1 is not less than the fault isolation charging time or the power supply restoration charging time required by the distributed feeder automation logic of the terminal to be tested.

Further, the automatic alarm of the switch on-off position signal is performed to prompt the switch associated with the tested terminal to perform the switching-on and switching-off operation, and the method includes:

if the switch of the tested terminal before the test is started is in the switching-off position, the switch is a tie switch, if the state sequence switching is carried out when the switch is in the switching-off position under the switching-in conversion condition in the called electric quantity state sequence, the switching-in conversion condition is determined to be an error, the alarm is carried out, and the electric quantity state sequence is prompted to be modified or the switching-on operation is carried out on the tested terminal;

if the switch of the tested terminal before the test is started is in the switching-on position, the switch is a section switch or a feeder switch, the state sequence switching is carried out only when the switch is in the switching-on position in the invoked electrical quantity state sequence, the switching-on switching condition is determined to be an error, an alarm is given, and the electrical quantity state sequence is prompted to be modified or the tested terminal is subjected to switching-off operation.

Further, the setting of the GOOSE signal state sequence of other terminals according to the setting information of the fault type to be tested and the position of the matched switch of the terminal to be tested includes:

setting configuration parameters of other terminals according to the type of the fault to be tested and the switch position of the terminal to be tested, generating a conventional GOOSE signal state sequence, outputting a corresponding GOOSE signal during testing, wherein the configuration parameters comprise the type of a GOOSE semaphore and the time delay from the test starting to the simulation of generating the GOOSE signal; the GOOSE semaphore types comprise node faults, switch refusal, fault isolation success and overcurrent lockout GOOSE signals, and the time delay from test starting to simulation generation of the GOOSE signals comprises time delay tg1 from test starting to node fault generation and time delay tg2 from test starting to switch refusal or fault isolation success.

setting configuration parameters of other terminals according to the type of the fault to be tested and the switch position of the terminal to be tested, generating a heartbeat GOOSE signal state sequence, and outputting a corresponding heartbeat GOOSE signal during testing, wherein the configuration parameters comprise the heartbeat GOOSE signal and the cycle trigger time tg3 of the heartbeat GOOSE signal;

when the cycle triggering time tg3 of the heartbeat GOOSE signal is set to be 0 second, the other terminal does not send the heartbeat GOOSE signal, so that the tested terminal senses the abnormal state of GOOSE communication between the other terminal and the tested terminal, and the distributed feeder automation logic of the tested terminal in the abnormal state of GOOSE communication is detected through the test model;

when the cycle triggering time tg3 of the heartbeat GOOSE signal is set to be not 0 second, the other terminals send heartbeat GOOSE signals in a cycle mode, and the GOOSE communication abnormity judgment logic of the tested terminal is tested.

Further, adjusting the time delay tg1 from the test starting to the node fault occurrence or the time delay tg2 from the test starting to the switch failure occurrence or the fault isolation success occurrence, includes:

and testing different distributed feeder automation logic processing behaviors which the tested terminal receives the fault GOOSE signal in or out of the time delay required by the distributed feeder automation fault processing.

Further, the control electrical quantity state sequence and the GOOSE signal state sequence are synchronously started to operate, the control electrical quantity state sequence and the GOOSE signal state sequence are used for simulating GOOSE signals generated by other terminals to be sent to the tested terminal, the control electrical quantity state sequence and the relay protection tester output electrical quantity required by testing distributed feeder automation to the tested terminal are started simultaneously according to the electrical quantity state sequence, and state switching operation is carried out according to state sequence conversion conditions.

Further, the method also comprises the following steps: the method comprises the steps that a distributed feeder automation line fault testing template library aiming at different types of line faults and different line fault occurrence positions is constructed in advance, and different distributed feeder automation line fault testing templates are selected to be led into corresponding testing models during testing;

the distributed feeder automation line fault testing template library comprises different line fault testing templates, and the line fault testing templates comprise a primary wiring diagram of a line, communication parameters required by line GOOSE peer-to-peer communication, an electrical quantity state sequence, a conventional GOOSE signal quantity state sequence and a heartbeat GOOSE signal quantity state sequence.

The invention achieves the following beneficial effects:

1) the invention has the advantage of low system cost. As the invention only needs one computer, one relay protection tester, one Ethernet switch, RJ45 network cable and other accessories, the intelligent distributed FA test system can be formed, and the hardware cost is far less than that of an RTDS simulation test system or a special test system formed by a plurality of relay protection testers.

2) The invention has the advantage of simple construction of test environment. The test of all distributed FA logic functions can be completed only by one relay and one tested terminal.

3) The invention has portability. The test system can be moved at any time by only one notebook computer and one portable relay protection tester, and even can be tested on the site of a ring network box to be put into operation, which is an advantage that other distributed FA test systems do not have.

4) By adopting the invention, the joint debugging of the distributed FA functions of the power distribution terminal and the ring net cage can be quickly finished, the liability accidents caused by insufficient joint debugging test are avoided, the liability risk of operation and maintenance debugging personnel is greatly reduced, and the invention plays an active role in promoting the application of the distributed FA functions in national and south nets.

Drawings

FIG. 1 is a schematic diagram of the connection of the present invention;

fig. 2 is a primary wiring diagram of a 10kV distribution line.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, the intelligent distributed feeder automation test method provided by the present invention includes a computer, an ethernet switch, a relay protection tester and a tested terminal, where the computer, the ethernet switch, the relay protection tester and the tested terminal are loaded with a test model, the ethernet switch is respectively connected to the computer, the relay protection tester and the tested terminal, and an electrical quantity of the relay protection tester is connected to the tested terminal.

The power distribution terminal in the figure is a tested object, a test tool is not shown in the figure, and the test tool can be an analog circuit breaker or medium-voltage switch equipment. And output electrical quantities of the relay protection tester such as Ia, Ib, Ic, I0, Ua, Ub and Uc are connected to the power distribution terminal.

The test method comprises the following steps:

the test method is described based on a 10kV distribution line primary wiring diagram shown in fig. 2, and fig. 2 is provided with three simplified ring net boxes with two inlets and three outlets, wherein F01-F09 are feeder switches and are directly connected to user loads, M01-M06 are incoming switches of the ring net boxes and are section switches on the 10kV lines, and M05 is an interconnection switch due to being located at a brake separating position.

The testing software can only configure one switch as a tested terminal on the whole primary circuit wiring diagram, if the current circuit has the tested terminal and a new tested terminal is set, the testing software pops up an interface to prompt that the tested terminal exists, prompts whether the switch needs to be forcibly set as the tested terminal or not, and automatically releases the originally bound tested terminal after the forced setting is successful.

The state switching triggering conditions of the electrical quantity state sequence of the test model mainly include the following three conditions:

time triggering: the delay of the sequence in the state reaches the set time, and the condition of switching to the next state sequence is met;

triggering of opening: and the state sequence is in the current state sequence, and the specified opening signal is received, so that the condition of switching to the next state sequence is met.

Time + open: when the delay of the sequence in the state reaches the set time or a specified starting signal is received, the condition of switching to the next state sequence is met;

the first method for configuring the electrical quantity state sequence of the tested terminal comprises the following steps: performing an electric quantity state sequence configuration method on a tested terminal based on a primary wiring diagram of a distribution line;

the test model can activate the distributed FA electrical quantity state sequence configuration menu of the terminal only by setting the terminal corresponding to the switch as the terminal to be tested, and in the configuration interface, the following similar state sequence editing and saving are performed, as shown in table 1.

TABLE 1

The following description is made in a quick-action type FA test using a circuit breaker.

The sequence of distributed FA electrical quantity states for the sectionalizer or the end switch in the experiment was designed with 4 states, see the table above.

When a direct intra-area fault occurs in the tested terminal, and the cutting-off logic of the distributed FA is executed, the state sequence 1-the state sequence 3 can be set. In this state, state sequence 4 may not be set because the tie switch or the adjacent side terminal of the terminal under test (executing fault isolation logic) will not directly restore power to the line fault interval.

If the tested terminal has indirect in-zone fault or is in a non-fault interval adjacent to the interconnection switch, the state sequence 1-4 can be set.

In the state sequence 1, a relay protection instrument provides electrical quantity meeting fault isolation charging conditions for a section switch or a last switch;

if the tested terminal has direct in-zone fault, the open condition in the state sequence 2 is used for testing the node fault of the tested terminal detected by the software, and the tested terminal is immediately converted into the state sequence 3 after the fault is cut off and the switch is opened.

If the tested terminal is a tie switch in the opening position, the distributed FA electrical quantity state sequence can also be designed into the same 4 state sequences, which is shown in Table 2.

TABLE 2

Because the tested terminal is an interconnection switch, the state sequence 1 aiming at the interconnection switch is used for providing the interconnection switch with the electric quantity meeting the condition of recovering power supply and recharging;

the opening and closing function of the state sequence 3 is to directly convert to the next state sequence when the interconnection switch recovers the power supply logic action, the breaker is closed, and the switch is in the closed position.

The electric quantity state sequence operation self-checking method comprises the following steps: when the test software is in a communication online state with the tested terminal, when a test is started, if the on-position signal of the tested terminal is detected to be inconsistent with the requirement of the electrical quantity state sequence file, automatic alarm is given to prompt the tested terminal to carry out on-off operation or modify the state sequence so as to eliminate the problem.

The specific details are as follows:

(1) if the switch of the tested terminal before the test is started is in the opening position, the switch is communicated, and the state sequence switching is carried out only if the opening switching condition in the called electric quantity state sequence is that the switch closing position is equal to 0 (the switch is in the opening position), and the switch is an erroneous opening switching condition, so that an alarm is given.

(2) If the switch of the tested terminal before the test is started is in the switching-on position, the terminal is a section switch or a last switch, and the state sequence switching is carried out only if the switching-on switching condition of the switch in the called electrical quantity state sequence is that the switching-on position of the switch is equal to 1 (the switch is in the switching-on position), the switching-on switching condition is wrong, and therefore an alarm is required.

Method for configuring GOOSE semaphore state sequence by test model

The GOOSE semaphore state sequence generation method of the test software can comprise two methods:

configuring GOOSE semaphore state sequence of other terminals: GOOSE semaphore state sequence configuration method based on distribution line primary wiring diagram

The GOOSE semaphore state sequence has two types, one is a conventional GOOSE semaphore state sequence type, and the other is a heartbeat GOOSE state sequence.

The test model can activate the configuration menu of the two GOOSE semaphore state sequences of the terminal only on the switch primitives of other terminals. In this configuration interface, the following similar state sequence editing and saving is performed.

1. The method for configuring the conventional GOOSE semaphore state sequence is described as follows:

and clicking the primitives of other terminals by a mouse, opening an interface for configuring and sending the GOOSE semaphore through a menu, and configuring the GOOSE semaphore state sequence.

The configuration parameters comprise the type of GOOSE semaphore and the delay from the start of the test to the simulation of the GOOSE semaphore.

A new type of GOOSE semaphore can be added to the GOOSE semaphore state sequence to implement the function that a terminal may generate multiple GOOSE semaphores during a distributed FA test.

The following is that a test model needs to simulate other terminals as the terminals for executing the fault removal logic, and the terminal generates at most two GOOSE semaphores, for example, if a fault occurs directly downstream of other terminals, the 1 st node fault GOOSE semaphore is sent first; and then simulating other terminals to execute the cutting logic, and generating switch rejection, and sending 2 nd switch rejection GOOSE semaphore.

Regular GOOSE state sequences	GOOSE semaphore definition	Test start-up delay
			GOOSE State sequence 1	Node failure	Time triggering: tg1 (delay from test start to node failure occurrence)
GOOSE status sequence 2	Switch failure	Time triggering: tg2 (delay from test start to switch failure)

2. The method for configuring the heartbeat GOOSE state sequence is described as follows:

heartbeat GOOSE state sequence	GOOSE semaphore definition	Test start-up delay
			Heartbeat GOOSE state sequence	Heartbeat GOOSE	Cycle trigger time: tg3

The heartbeat GOOSE state sequence is different from the conventional GOOSE semaphore state sequence in that it is transmitted cyclically.

Configuring a heartbeat GOOSE function one: and prohibiting other terminals from generating heartbeat GOOSE messages. For example, the tg3 time is set to 0 second, the terminal does not send the heartbeat GOOSE message. The function is used for simulating the GOOSE communication abnormal state generated by the tested terminal and carrying out corresponding distributed FA logic test.

Configuring a heartbeat GOOSE function two: and adjusting the tg3 time, namely adjusting the time interval of sending the heartbeat GOOSE message. The method can accurately test the GOOSE communication abnormal time judgment logic of the tested terminal.

Configuring GOOSE semaphore state sequence of other terminals: and carrying out GOOSE signal state sequence configuration on other terminals based on a file mode.

And editing and storing the state sequence of other terminals in a mode of editing the GOOSE semaphore state sequence file, and completing the distributed FA logic test by matching with the tested terminal. The second method for editing the GOOSE signal state sequence can be edited by the test software in a form entry mode or the like, and can also be used for editing and storing the GOOSE signal state sequence file by using third-party software.

The method for coordinating the parameter configuration of the electrical quantity state sequence and the GOOSE semaphore state sequence comprises the following description:

1. the time t1 in the electrical quantity state sequence is required to meet the fault isolation charging time or the power supply recovery charging time of the tested terminal.

2. The occurrence time of the GOOSE semaphore with node fault simulated by other terminals, namely, t1 time longer than the electrical volume state sequence of the terminal to be tested needs to be considered, the time for judging the node fault by the terminal to be tested also needs to be considered, the length of delay time of tg1 or tg2 and the like can be adjusted, the GOOSE semaphore is judged to be received by the terminal to be tested in advance or in delay for too long time, and the influence on the distributed FA logic function of the terminal is caused. And further, the fact that the detected terminal receives the GOOSE signal in advance or after a delay time of more than 20ms can be controlled, and the GOOSE signal is used for detecting the influence on the distributed FA action logic of the detected terminal under the condition that the technical requirement that the transmission delay time of peer-to-peer communication fault information interaction communication processing is less than or equal to 20ms is not met.

3. And configuring the GOOSE signals sent by other terminals in a simulation manner, and only the GOOSE semaphore state sequence configuration of other terminals related to the adjacent side of peer-to-peer communication needs to be considered, so that all other terminals of the whole line do not need to be configured, and the configuration workload is reduced.

The tested terminal senses the electrical quantity applied by the relay protection tester according to the electrical quantity state sequence, and generates an intelligent distributed FA action logic according to the received GOOSE message sent by the test software simulation other terminals.

The line fault test template needs to store a primary wiring diagram, line topology parameters, an electrical quantity state sequence and a GOOSE signal quantity state sequence of a 10kV distribution line.

And establishing a distributed FA circuit fault test template library for the full logic test aiming at different types of circuit faults and different circuit fault occurrence positions.

The testing software directly calls the distributed FA circuit fault testing template library, and all distributed feeder automation logic functions of the tested terminal can be tested quickly.

The key points of the invention are as follows:

key point 1: and simultaneously, the testing software simulates that when other terminals have 10kV line faults, the terminals generate distributed FA GOOSE signal quantity. The tested terminal generates a related distributed FA action outlet based on the electrical quantity output by the relay protection instrument and the GOOSE semaphore generated by simulation of the test software, and tests of different action logics of fault removal, fault isolation or power restoration when the tested terminal is located at different positions of a fault line are completed.

Key point 2: the testing software has the function of configuring the electric quantity state sequence of the tested terminal, and the relay protection instrument is controlled by the testing software to output the electric quantity state sequence to the tested terminal;

key point 3: the test software has the function of configuring the GOOSE semaphore state sequence of the tested terminal. When the testing software starts the electrical quantity state sequence to control the relay protection tester to output the line fault related electrical quantity to the tested terminal, the GOOSE semaphore required by testing the distributed FA function is generated for other terminals in a simulated mode at the appointed time according to the GOOSE semaphore state sequence. The tested terminal senses the electrical quantity when the line is in fault, and generates a distributed FA action logic behavior according to the received GOOSE signal quantity of other terminals, and the testing software judges the correctness of the distributed FA action logic of the tested terminal according to the testing model.

Key point 4: and (3) coordinating the parameter configuration of the electrical quantity state sequence and the GOOSE semaphore state sequence. By the method, other terminals can simulate different moments to generate the GOOSE signals, and whether the distributed FA internal logic time sequence design is correct can be detected more strictly.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent distributed feeder automation function test method for a power distribution terminal is characterized by comprising the following steps:

step A: acquiring set information of fault removal and fault isolation types required by distributed feeder automation to be tested, wherein the set information comprises primary wiring information of a distribution line where a tested terminal is located, the tested terminal information and the fault removal and fault isolation types required by the distributed feeder automation to be tested;

generating a test model according to the primary wiring information of the distribution line where the tested terminal is located and the tested terminal information, wherein the test model comprises a primary wiring diagram of the distribution line where the tested terminal is located, an electrical quantity state sequence applied to the tested terminal and a GOOSE signal state sequence simulating other terminals of the distribution line where the tested terminal is located, and the primary wiring diagram is used for simulating, controlling and displaying the tripping or closing behaviors of the tested terminal or other terminal matched switches;

step D: according to the electrical quantity state sequence of the switch, the GOOSE signal state sequence of other terminals and the position of the terminal to be tested on a primary wiring diagram, simulating the action of generating the fault removal and fault isolation protection tripping action required by the automation of the distributed feeder or the action of automatically switching on the power supply recovery requirement, wherein the action comprises the following steps:

determining the configuration information of the tested terminal according to the electrical quantity state sequence of the tested terminal of the switch and the position of the tested terminal in the primary wiring diagram; determining configuration information of other terminals according to the GOOSE signal state sequences of other terminals and the positions of the terminals to be tested at the primary wiring diagram; configuring the configuration information of the tested terminal and the configuration information of other terminals to a switch element corresponding to the tested terminal on a primary wiring diagram and switch primitives corresponding to other terminals which are in adjacent communication with the tested terminal on the primary wiring diagram; according to the configuration information, the primary wiring diagram test model simulates, controls and displays the tripping or closing behaviors of the tested terminal or other terminal matched switches;

2. The method of claim 1, wherein only one distribution terminal is configured as a terminal under test at a time in the primary wiring diagram.

3. The method for testing the intelligent distributed feeder automation function of the distribution terminal according to claim 1, wherein the determining that the tested terminal is working correctly when processing the fault type includes:

4. The method for testing the intelligent distributed feeder automation function of the power distribution terminal according to claim 1, wherein the electrical quantity state sequence applied to the tested terminal is provided with a state switching trigger condition, and the method comprises the following steps:

5. The method for testing the intelligent distributed feeder automation function of the power distribution terminal according to claim 1, wherein the generating of the electrical quantity state sequence applied to the tested terminal comprises:

the first configuration comprises the following steps:

the second configuration comprises:

6. The method for testing the intelligent distributed feeder automation function of the power distribution terminal according to claim 5, wherein the generating of the electrical quantity state sequence applied to the tested terminal comprises:

7. The method for testing the intelligent distributed feeder automation function of the power distribution terminal according to claim 6, characterized in that before a test is performed, switch on-position information associated with the tested terminal is obtained, and if the switch on-position information does not match with an initial state sequence requirement of an electrical quantity state sequence generated after a file is imported, a switch on-position signal is automatically alarmed to prompt switching-on and switching-off operations of a switch associated with the tested terminal.

8. The method for testing the intelligent distributed feeder automation function of the power distribution terminal as claimed in claim 5 or 6, wherein the pre-fault maintenance time t1 is not less than the fault isolation charging time or the power restoration charging time required by the distributed feeder automation logic of the terminal under test.

9. The intelligent distributed feeder automation function testing method of the power distribution terminal as claimed in claim 7, wherein the performing of the automatic alarm of the switch on/off position signal prompts the switching on/off operation of the switch associated with the tested terminal, comprises:

if the switch of the tested terminal before the test is started is in the switching-off position, the switch is a tie switch, if the state sequence switching is carried out when the switch is in the switching-off position under the switching-on conversion condition in the called electric quantity state sequence, the switching-on conversion condition is determined to be an error, the alarm is carried out, and the electric quantity state sequence is prompted to be modified or the switching-on operation is carried out on the tested terminal;

if the switch of the tested terminal before the test is started is in the switching-on position, the tested terminal is a section switch or a feeder switch, the state sequence switching is carried out only if the switching-in switching condition in the called electric quantity state sequence is that the switch is in the switching-on position, the switching-in switching condition is determined to be an error, the alarm is carried out, and the electric quantity state sequence is prompted to be modified or the switching-off operation is carried out on the tested terminal.

10. The method for testing the intelligent distributed feeder automation function of the power distribution terminal according to claim 1, wherein the step of setting the GOOSE signal state sequence of other terminals according to the setting information of the fault type to be tested and the matched switch position of the tested terminal comprises the steps of:

11. The method for testing the intelligent distributed feeder automation function of the power distribution terminal according to claim 1, wherein the step of setting the GOOSE signal state sequence of other terminals according to the setting information of the fault type to be tested and the matched switch position of the tested terminal comprises the steps of:

12. The method for testing the intelligent distributed feeder automation function of the distribution terminal as claimed in claim 10, wherein the adjusting of the time delay tg1 from the test start to the node fault or the time delay tg2 from the test start to the switch failure or the fault isolation success comprises:

13. The method for testing the automation function of the intelligent distributed feeder of the power distribution terminal as claimed in claim 1, wherein the electrical quantity state sequence and the GOOSE signal state sequence are controlled to start and operate synchronously for simulating GOOSE signals generated by other terminals to be sent to the terminal to be tested, and the relay protection tester outputs the electrical quantity required for testing the automation of the distributed feeder to the terminal to be tested according to the electrical quantity state sequence, starts simultaneously, and performs state switching operation according to the state sequence conversion condition.

14. The method of claim 1, further comprising: the method comprises the steps that a distributed feeder automation line fault testing template library aiming at different types of line faults and different line fault occurrence positions is constructed in advance, and different distributed feeder automation line fault testing templates are selected to be led into corresponding testing models during testing;