CN108879964B - On-site feeder automation system on-site verification transmission FA full-automatic test method - Google Patents
On-site feeder automation system on-site verification transmission FA full-automatic test method Download PDFInfo
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Abstract
The invention discloses a full-automatic test method for on-site verification transmission FA of an on-site feeder automation system, which relates to the technical field of distribution automation.A feeder automation intelligent tester and a feeder switch working condition self-adaptive simulator are connected to a substation outlet switch and a feeder switch terminal of a tested feeder, a slave test scheme at the terminal of each feeder switch is derived from a main test scheme of a main tester at a cloud platform or the substation outlet switch, each slave tester realizes coordination and cooperation with the main tester of the substation outlet switch by monitoring the feeder test working condition, the full processes of fault detection, isolation and power restoration of the substation outlet switch protection and all feeder switch terminals can be tested and verified without real-time communication between the master and the slave, the feeder FA function and performance test can be fully automatically completed, and the substation switch, the feeder section switch, the transformer substation switch, the feeder section switch, the transformer switch and the like can be completed at one time, And (5) carrying out transmission test on the interconnection switch.
Description
Technical Field
The invention relates to the technical field of distribution automation, in particular to a full-automatic test method for transmission FA in on-site verification of an on-site feeder automation system.
Background
The invention discloses a secondary injection test method for a power distribution automation system, which is invented by Liujian of Shaanxi institute of electrical science and research, and the like. The invention discloses a testing method for synchronous coordination of main station injection and secondary injection of a power distribution automation system, which is mainly suitable for a centralized power distribution automation mode. The two patents cannot carry out on-site setting check switch transmission test on the on-site type feeder automation full feeder FA function, and cannot realize full automatic test. The invention patent of Liujia et al, a 10kV feeder short circuit test method, provides a 10kV feeder short circuit test method, by directly connecting a specially-made impedance element to a 10kV overhead feeder, a real controllable 10kV short circuit fault is formed, so that the fault processing function of in-situ type feeder automation equipment can be tested, but a real short circuit accident of Nx 2 times (N is the number of feeder sections) needs to be manufactured, the impact on a distribution network is large, the safety measure requirement is high, potential safety hazards exist, and multiple times of power failure and power transmission are needed. The test preparation work is complex, the test time is long, the test method is mainly used for scientific research tests, and the test method cannot be widely popularized and applied in actual engineering.
Shaanxi electric power science research institute Liujia professor et al and domestic and overseas distribution automation engineering technical personnel have carried out a large amount of research on distribution automation system test technology, have obtained a plurality of patents, have published a series of papers, have published treatises such as "distribution automation system test technology", the paper patent of domestic and overseas distribution automation test etc. do not mention the full feeder FA full automatic test method including the transformer substation outgoing line switch protection setting of on-the-spot feeder automation.
In summary, an effective method and a test means for on-site feeder automation full-line on-site protection setting full-automatic test are still lacking in the field of distribution automation at present.
Disclosure of Invention
The embodiment of the invention provides a full-automatic test method for on-site transmission FA (feeder automation) verification of an on-site feeder automation system, which can solve the problems in the prior art.
The invention provides a full-automatic test method for transmission FA for on-site verification of an on-site type feeder automation system, which comprises a full-automatic test method for transmission FA for on-site verification of a voltage-time on-site type feeder automation system, a full-automatic test method for transmission FA for on-site verification of a voltage-current time on-site type feeder automation system and a full-automatic test method for transmission FA for self-adaptive on-site type feeder automation protection setting verification of a national network, wherein the steps of the two latter two methods are the same;
before the three methods are started, the equipment needs to be configured, and the configuration method comprises the following steps: (1) configuring a feeder automation intelligent tester at a feeder outlet switch protection device, wherein the tester works in a master working mode, called a main tester for short;
(2) a feeder switch working condition self-adaptive simulator is configured at a feeder line section and a tie switch terminal, and the simulator works in a driven working mode, namely a slave tester for short;
the voltage-time in-place feeder automation system field check transmission FA full-automatic test method comprises the following steps:
obtaining a test scheme of a current corresponding segmentation/interconnection switch from a cloud platform or a main tester;
after confirming that the relevant state parameter setting in the test scheme is consistent with the fixed value of the field feeder switch terminal and the selected residual voltage fixed value in the test scheme is consistent with the field feeder switch terminal, disconnecting the current loop connection of the outgoing line switch protection device and the field feeder switch terminal, connecting the outgoing line switch protection device into the current loop of the main tester, disconnecting the connecting cable of the field PT power supply and the power distribution terminal, and switching the PT power supply cable to the slave tester and then connecting the PT power supply cable to the power distribution terminal;
after the three-remote checking of the feeder terminal, the three-remote checking of the main station and the instantaneous fault test of the feeder are completed, the permanent fault test is sequentially carried out on each section of the feeder, and the full-automatic test of the voltage-time in-place type feeder automation system field check transmission FA is completed;
the voltage-current time type in-place feeder automation system field check transmission FA full-automatic test method comprises the following steps:
obtaining a test scheme of a current corresponding segmentation/interconnection switch from a cloud platform or a main tester;
after confirming that the relevant state parameter setting in the test scheme is consistent with the fixed value of the field feeder switch terminal and the selected residual voltage fixed value in the test scheme is consistent with the field feeder switch terminal, disconnecting the current loop connection of the outgoing line switch protection device and the field feeder switch terminal, connecting the outgoing line switch protection device into the current loop of the main tester, disconnecting the connecting cable of the field PT power supply and the power distribution terminal, switching the PT power supply cable to the slave tester, connecting the PT power supply cable to the power distribution terminal, simultaneously disconnecting the current loop of the field feeder switch terminal to the CT loop of the power distribution terminal, and connecting the current loop of the slave tester to the power distribution terminal;
after the feeder terminal three-remote checking, the main station three-remote checking and the feeder instantaneous fault test are completed, the permanent fault test is sequentially carried out on each section of the feeder, and the voltage-current time type in-situ type feeder automation system field check transmission FA full-automatic test is completed;
the feeder switch working condition self-adaptive simulator comprises a single chip microcomputer, a programmable logic array, a liquid crystal display unit, an input/output interface circuit, a feeder working condition simulation circuit and a self-adaptive control interface circuit;
the single chip microcomputer is electrically connected with the liquid crystal display unit, the input/output interface circuit and the programmable logic array, the feeder line working condition simulation circuit and the self-adaptive control interface circuit are electrically connected with the programmable logic array, the feeder line working condition simulation circuit is electrically connected with an external PT power supply and a tested terminal, the self-adaptive control interface circuit is electrically connected with the tested terminal, and the input/output interface circuit is electrically connected with the tested terminal.
The FA full-automatic test method for the on-site check transmission of the on-site feeder automation system in the embodiment of the invention is particularly suitable for the protection check and switch transmission test before the whole feeder is electrified after the installation of the feeder automation switch terminal equipment is completed and the feeder outlet switch protection is reset, and the protection check transmission test including the outlet switch and the FA transmission test of the whole feeder are completed at one time, so that the problem that the fault isolation transmission test of all sections of the on-site feeder automation cannot be completed at one time is solved, all functional requirements of FA are met at one time, the test workload is reduced, a test report can be automatically generated, and the test efficiency is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a voltage-time in-situ type feeder automation system field verification transmission FA full-automatic test method in the in-situ type feeder automation system field verification transmission FA full-automatic test method provided in the embodiment of the present invention;
fig. 2 is a flowchart of a voltage-current time-type in-situ verification transmission FA full-automatic test method for an in-situ feeder automation system in the in-situ verification transmission FA full-automatic test method for the in-situ feeder automation system according to the embodiment of the present invention;
FIG. 3 is a diagram of the overall circuit connection of the feeder switch operating mode adaptive simulator used in the on-site verification transmission FA full-automatic testing method of the in-situ feeder automation system according to the embodiment of the present invention;
FIG. 4 is a circuit diagram illustrating the simulator of FIG. 3 in which feeder switch interface adaptation is performed;
fig. 5 is a circuit connection diagram of the simulator in fig. 3 when the feeder line condition simulation is performed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, in an embodiment of the present invention, a full-automatic test method for a field verification transmission FA of an in-place type feeder automation system is provided, and the method includes a full-automatic test method for a field verification transmission FA of a voltage-time in-place type feeder automation system, a full-automatic test method for a field verification transmission FA of a voltage-current time in-place type feeder automation system, and a full-automatic test method for a national network adaptive in-place type feeder automation full-feeder protection setting verification transmission FA.
Before the three tests are carried out, a test scheme is required to be firstly compiled, the test scheme comprises a plurality of test functions, each function comprises a plurality of test states, and the test states are one electric working state of the tested switch terminal in the normal operation or fault and fault processing process and comprise analog quantity states of voltage, current waveform and the like of the tested switch terminal, switching-on and switching-off states of the switch and the like. After the test scheme is compiled, the test scheme can be stored on site or uploaded to a cloud platform.
Before the voltage-time in-place feeder automation system on-site verification transmission FA full-automatic test method starts, equipment needs to be configured, and the configuration method comprises the following steps: (1) configuring a feeder automation intelligent tester (a master operating mode), called a master tester for short, at a feeder outlet switch protection device;
(2) a feeder switch working condition self-adaptive simulator (a driven working mode) is configured at a feeder section and a tie switch terminal, and is called a slave tester for short.
The method comprises the following steps that a test scheme of protection verification of the feeder line outlet switch generated or downloaded at a main tester is called as a main test scheme, and a slave test scheme of each feeder line switch terminal is derived after the slave tester downloads the main test scheme, and the specific method comprises the following steps:
(1) downloading a main test scheme named as a switch slave test scheme on a cloud platform or a main tester; and the slave test scheme inherits all test states and test functions of the main test scheme, and correspondingly adjusts the electrical working conditions and the switching working condition data of the test states and the test functions according to the working conditions of the feeder switch terminal.
(2) The slave test scheme inherits the test starting and ending conditions of the main test scheme and matches the state and working conditions of the feeder switch terminal, and the main data comprises the following data: manual start, timed start, manual end and emergency stop.
(3) The slave test scheme inherits all test state timing and delay conversion conditions of the main test scheme, and performs conversion matching on state conditions corresponding to the feeder switch terminal, and the method mainly comprises the following steps: delay time switching, switch deflection, opening conditions, certain analog quantity out-of-limit value switching, the opening quantity and state quantity combinational logic editing, received state sequence switching and control instructions and the like.
(4) The slave test scheme inherits the electrical working condition data of all test states of the main test scheme, and adjusts and matches according to the electrical working condition data of the feeder switch terminal, and the method mainly comprises the following steps:
alternating current power frequency secondary voltage Uab, Ucb, Uac and Uo parameters of the electrical state of the power distribution terminal, and a PT power supply and measurement integrated field are realized by adopting a feeder working condition simulator;
secondary current Ia, Ib, Ic and Io, phase angle Uab ^ Ia, Ucb ^ Ic, power frequency F and other electrical working parameter data;
adjusting a relay protection fixed value: constant value of current IⅠ、IⅡ、IⅢAnd time constant tⅠ、tⅡ、tⅢProtection constant value parameters are equal;
feeder automation mode specific constant value adjustment:
such as voltage-time type X time limit, Y time limit, XL time limit, YL time limit, reclosing delay time limit and the like;
such as voltage-current time type X time limit, Y time limit, XL time limit, YL time limit, reclosing time delay time limit and the like;
and the electric working operation compares parameters such as an upper voltage limit Umax, a lower voltage limit Umin, an upper current limit Imax, a lower current limit Imin and the like.
The method for realizing the detection and cooperative test of the electric working condition of the feeder line at the terminal of the feeder line switch comprises the following steps:
the main tester detects the voltage at the feeder switch through PT, and the conversion of a key test state is known through the voltage;
when the test is carried out to the state of tripping and closing the outgoing line switch, the slave tester monitors the PT voltage of the feeder switch terminal, and the test state and the state of the main tester are synchronized;
if the slave tester and the main tester are in a fault test state, the slave tester synchronously applies fault current according to the parameter configuration of the test scheme and the main tester;
if the fault occurs in the test state, when the feeder line outlet switch is in overcurrent tripping, the feeder line is in voltage loss, the slave tester detects that the local switch PT is in voltage loss, and the fault current output is immediately cut off, so that the fault current output is synchronized with the main tester;
if the reclosing test state is in the permanent fault condition, when the feeder line outlet switch reclosing feeder line is electrified, the slave tester detects that the switch PT at the position has voltage, and immediately outputs fault current, so that the slave tester and the master tester are synchronized.
And by analogy, synchronous testing of the slave tester and the master tester is realized through a testing scheme and a feeder line voltage detection means.
The feeder line outgoing switch has no test state of switch deflection, and synchronization is realized through delay time or timing time.
The voltage-time in-place feeder automation system field check transmission FA full-automatic test method comprises the following steps:
step 100, obtaining a test scheme of a currently corresponding section/tie switch from a cloud platform or a main tester;
step 101, checking whether the relevant state parameter settings in the test scheme are consistent with the fixed values of the field feeder switch terminals: such as whether various test state parameters are consistent with the tested feeder switch terminal fixed value, whether the current size and the duration time of the applied fault state are larger than the terminal overcurrent fixed value and the fault duration fixed value, whether various state conversion criteria (timing, delay time, voltage criterion, current criterion, input quantity criterion and combinational logic criterion) are corresponding to the input, and the like.
Step 102, checking and verifying whether the selected residual voltage value in the test scheme is consistent with the field feeder switch terminal.
And 103, disconnecting the current loop connection of the feeder line outlet switch protection device and the field feeder switch terminal, and connecting the feeder line outlet switch protection device into the current loop of the main tester.
And 104, disconnecting the connecting cable of the on-site PT power supply and the power distribution terminal, and switching the PT power supply cable to the slave tester and then to the power distribution terminal.
And 105, checking whether the telemetering data is reasonable, whether the switch position, remote/local and other remote signaling positions are correct or not at the feeder terminal, whether the local opening and closing operation of the switch by the feeder terminal is normal or not, and checking whether the opening and closing operation of the local software control switch is correct or not by using a feeder terminal debugging tool.
Step 106, checking whether the telemetering data is consistent with a feeder terminal, whether a switch position and a remote/local position are consistent with the feeder terminal, whether remote signaling deflection and SOE can be uploaded correctly or not, whether local opening and closing operations of the main station on the feeder switch are normal or not, and testing performance indexes including communication conditions, such as telemetering change uploading time, remote signaling deflection uploading time, remote control command execution time and the like;
step 107, a main tester simulates instantaneous fault of the tail end of a feeder line, and tests the incoming call X delay switching-on time, the Y time non-fault boundary detection function after switching-on and the non-locking processing function of the section switch terminal at the upstream of the fault section in the primary reclosing process;
108, testing permanent faults of a section of the feeder line:
a. an outgoing switch injects overcurrent into a main tester, the outgoing switch trips to cut off fault current, the outgoing switch is superposed for the first time after short delay, all section switches are sequentially switched on, the outgoing switch injects overcurrent into the main tester again after an upstream boundary switch of a fault section is switched on, the outgoing switch trips again to cut off the fault, the upstream boundary switch is locked due to power loss in Y time limit, a slave tester at the downstream boundary section switch of the fault section simulates short-time incoming residual voltage, and the switch is locked;
b. the outgoing line switches are overlapped for the second time after long time delay, all the section switches are sequentially switched on, the boundary switch at the upstream of the fault section is required to be positioned at a locking position and not switched on, and the upstream power supply is recovered;
c. the interconnection switch is switched on after one side is in power failure and delayed, the related section switches are switched on in sequence, the boundary switch at the downstream of the fault section is required to be positioned at a locking position and not switched on, and the downstream is restored to supply power;
d. and (4) switching off is operated on the interconnection switch terminal, switching on is sequentially operated at the upstream boundary switch and the downstream boundary switch terminal of the fault section, normal power supply is recovered, and the locking state is automatically released.
And step 109, performing permanent fault test on each section in sequence according to step 108, and completing voltage-time in-place feeder automatic protection inspection and FA automatic test.
Before the voltage-current time type in-place feeder automation system field check transmission FA full-automatic test method starts, equipment configuration is also needed, and the configuration method comprises the following steps: (1) configuring a main tester at a feeder outlet switch protection device;
(2) slave testers are provided at the feeder sections and tie switch terminals.
The voltage-current time type in-place feeder automation system field check transmission FA full-automatic test method comprises the following steps:
200, obtaining a test scheme of a currently corresponding section/tie switch from a cloud platform or a main tester;
step 201, checking whether the relevant state parameter setting in the test scheme is consistent with the fixed value of the field feeder switch terminal: such as whether various test state parameters are consistent with the terminal fixed value of the tested feeder switch, whether the current size and the duration time of the applied fault state are larger than the terminal overcurrent fixed value and the fault duration fixed value, whether various state conversion criteria (timing, delay time, voltage criteria, current criteria, input amount criteria and combinational logic criteria) are corresponding to the input, and the like.
Step 202, checking that the selected residual voltage fixed value in the test scheme is consistent with the field feeder switch terminal.
And step 203, disconnecting the current loop connection of the outgoing line switch protection device and the field feeder switch terminal, and connecting the outgoing line switch protection device into the current loop of the main tester.
Step 204, disconnecting a connecting cable of the on-site PT power supply and the power distribution terminal, and switching the PT power supply cable to a slave tester and then to the power distribution terminal; and disconnecting the current loop of the field feeder switch terminal to the CT loop of the power distribution terminal, connecting the current loop of the tester to the power distribution terminal, and paying attention to whether the CT loop has open circuit protection.
And step 205, checking whether the telemetering data is reasonable, whether the switch position, remote/local and other remote signaling positions are correct or not at the feeder terminal, whether the local opening and closing operation of the switch by the feeder terminal is normal or not, and checking whether the opening and closing operation of the local software control switch is correct or not by using a feeder terminal debugging tool.
Step 206, checking whether the telemetering data is consistent with a feeder terminal, whether the switch position and the remote/local position are consistent with the feeder terminal, whether the telecommand deflection and the SOE can be uploaded correctly, whether the local opening and closing operation of the main station on the feeder switch is normal, and testing performance indexes including the communication condition, such as telemetering change uploading time, telecommand deflection uploading time, remote control command execution time and the like;
step 207, a main tester simulates instantaneous fault of the tail end of a feeder line, and tests the incoming call X delay switching-on time, the Y time non-fault boundary detection function after switching-on and the non-locking processing function of the section switch terminal at the upstream of a fault section in the primary reclosing process;
step 208, testing permanent faults of a section of the feeder line:
a. an outgoing line switch injects overcurrent into a main tester, overcurrent is synchronously injected from the tester at each feeder terminal position at the upstream of a fault section, the outgoing line switch trips to cut off fault current, the outgoing line switch is firstly superposed after short delay, each section switch is sequentially switched on, the outgoing line switch injects overcurrent into the main tester again after the boundary switch at the upstream of the fault section is switched on, the outgoing line switch trips again to cut off the fault, the boundary switch at the upstream is switched off and locked within Y time limit, the slave tester at the boundary section switch at the downstream of the fault section simulates short-time incoming residual voltage, and the switch is required to be locked;
b. the outgoing line switches are overlapped for the second time after long time delay, all the section switches are sequentially switched on, the boundary switch at the upstream of the fault section is required to be positioned at a locking position and not switched on, and the upstream power supply is recovered;
c. the interconnection switch is switched on after one side is in power failure and delayed, the related section switches are switched on in sequence, the boundary switch at the downstream of the fault section is required to be positioned at a locking position and not switched on, and the downstream is restored to supply power;
d. and (4) switching off is operated on the interconnection switch terminal, switching on is sequentially operated at the upstream boundary switch and the downstream boundary switch terminal of the fault section, normal power supply is recovered, and the locking state is automatically released.
And step 209, sequentially carrying out permanent fault test on each section according to step 208, and completing voltage-current time type in-place feeder automatic protection inspection and FA automatic test.
The test scheme compilation, equipment configuration and specific test steps of the state network self-adaptive in-situ feeder automatic full-feeder protection setting check transmission FA full-automatic test method are the same as voltage-current time types, and scheme parameter configuration needs to be carried out according to self-adaptive working parameters.
The feeder automation intelligent tester comprises a scheme editing upper computer and a lower single chip microcomputer, comprises a current-voltage power output unit, an input-output unit, a voltage detection unit, a cloud platform communication function and a feeder switch working condition self-adaptive simulator, and can be communicated with and control the feeder switch working condition self-adaptive simulator.
Referring to fig. 3, the feeder switch condition adaptive simulator in the present invention includes a single chip, a programmable logic array, a liquid crystal display unit, an input/output interface circuit, a feeder condition simulation circuit, an adaptive control interface circuit, and a power supply circuit, where the power supply circuit converts an externally input power supply into a suitable voltage for the single chip, the programmable logic array, the liquid crystal display unit, the input/output interface circuit, the feeder condition simulation circuit, and the adaptive control interface circuit.
The single chip microcomputer is electrically connected with the liquid crystal display unit, the input/output interface circuit and the programmable logic array, and the feeder line working condition simulation circuit and the self-adaptive control interface circuit are connected with the programmable logic array. The single chip microcomputer is in data communication with the feeder automation intelligent tester in an RS485 or WiFi mode, the feeder working condition simulation circuit is electrically connected with an external PT power supply and a tested terminal, the self-adaptive control interface circuit is electrically connected with the tested terminal, and the input/output interface circuit is electrically connected with the tested terminal.
Referring to fig. 4, the power circuit includes an AC/DC and DC/DC level conversion circuit, and the conversion circuit converts DC 24-220V/AC 220V/380V power input from a tested terminal into 0/5V power and inputs the power into the single chip microcomputer. The single chip microcomputer is provided with a plurality of delay units, signals subjected to level conversion are input into the delay units, the programmable logic array is provided with a switch type coding and decoding circuit and a switch operation control logic circuit, the switch type coding and decoding circuit is used for controlling the selection state of a type change-over switch, the input end of the type change-over switch is connected to the output end of the delay unit, and when the type change-over switch is in different switching states, the delay units are connected to different switch operation control logic circuits, namely the delay units are adaptively switched to a required interface circuit.
The self-adaptive control interface circuit is essentially a relay, the relay is controlled by the programmable logic array, the input end of the relay is connected with the output end of the switch operation control logic circuit, and the output end of the relay is connected with the control circuit of the tested terminal. When the type change-over switch is switched and connected to a required switch operation control logic circuit, the relay also connects the switch operation control logic circuit with the tested terminal to realize the self-adaptive interface of the operation control loop.
The programmable logic array is pre-programmed with control logics of electromagnetic operating mechanisms, spring operating mechanisms, permanent magnet operating mechanisms and the like of various breaker type distribution switches and various load switch type distribution switches. The single chip microcomputer receives data such as a switch type control instruction and switch opening and closing delay sent by the feeder automation intelligent tester, the data is analyzed and then sent to the programmable logic array, and the programmable logic array receives information and then controls the switching state of the type switch through the switch type coding and decoding circuit.
The programmable logic array can be programmed on line, and the switch types which are not available can be expanded at any time to form a required switch operation control logic circuit.
Referring to fig. 5, the programmable logic array also has a fault type state control decoder therein for controlling the state of the fault type switch. When the single chip receives the fault state characteristic data, the fault state characteristic data is analyzed and then sent to the programmable logic array, and the programmable logic array controls the fault type selector switch to be switched to a required state through the fault type state control decoder.
The feeder working condition simulation circuit is also essentially a relay, the relay is controlled by the programmable logic array, the input end of the relay is electrically connected with the output end of the fault type switch, the output end of the relay is electrically connected with the secondary end of the fault state transformer, and the primary end of the fault state transformer is electrically connected with the PT power supply. When the fault type switch is switched to a required state, the relay also connects the fault type switch to different positions of a secondary coil of the fault state transformer so that the fault state transformer is in different transformation ratios, and further controls the voltage output by the PT power supply to the tested terminal, thereby simulating various feeder line electric working conditions of normal and fault field feeder lines.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (3)
1. The method is characterized by comprising a voltage-time type in-situ feeder automation system field check transmission FA full-automatic test method, a voltage-current time type in-situ feeder automation system field check transmission FA full-automatic test method and a national network self-adaptive type in-situ feeder automation full feeder protection setting check transmission FA full-automatic test method, wherein the steps of the two latter methods are the same;
before the three methods are started, equipment needs to be configured, and the configuration method comprises the following steps: (1) configuring a feeder automation intelligent tester at a feeder outlet switch protection device, wherein the tester works in a master working mode and is called a main tester;
(2) a feeder switch working condition self-adaptive simulator is configured at a feeder section and a tie switch terminal, and the simulator works in a driven working mode and is called as a slave tester;
the voltage-time in-place feeder automation system field check transmission FA full-automatic test method comprises the following steps:
obtaining a test scheme of a current corresponding segmentation/interconnection switch from a cloud platform or a main tester;
after confirming that the relevant state parameter setting in the test scheme is consistent with the fixed value of the field feeder switch terminal and the selected residual voltage fixed value in the test scheme is consistent with the field feeder switch terminal, disconnecting the current loop connection of the outgoing line switch protection device and the field feeder switch terminal, connecting the outgoing line switch protection device into the current loop of the main tester, disconnecting the connecting cable of the field PT power supply and the power distribution terminal, and switching the PT power supply cable to the slave tester and then connecting the PT power supply cable to the power distribution terminal;
after the three-remote checking of the feeder terminal, the three-remote checking of the main station and the instantaneous fault test of the feeder are completed, the permanent fault test is sequentially carried out on each section of the feeder, and the full-automatic test of the voltage-time in-place type feeder automation system field check transmission FA is completed;
the voltage-current time type in-place feeder automation system field check transmission FA full-automatic test method comprises the following steps:
obtaining a test scheme of a current corresponding segmentation/interconnection switch from a cloud platform or a main tester;
after confirming that the relevant state parameter setting in the test scheme is consistent with the fixed value of the field feeder switch terminal and the selected residual voltage fixed value in the test scheme is consistent with the field feeder switch terminal, disconnecting the current loop connection of the outgoing line switch protection device and the field feeder switch terminal, connecting the outgoing line switch protection device into the current loop of the main tester, disconnecting the connecting cable of the field PT power supply and the power distribution terminal, switching the PT power supply cable to the slave tester, connecting the PT power supply cable to the power distribution terminal, simultaneously disconnecting the current loop of the field feeder switch terminal to the CT loop of the power distribution terminal, and connecting the current loop of the slave tester to the power distribution terminal;
after the feeder terminal three-remote checking, the main station three-remote checking and the feeder instantaneous fault test are completed, the permanent fault test is sequentially carried out on each section of the feeder, and the voltage-current time type in-situ type feeder automation system field check transmission FA full-automatic test is completed;
the feeder switch working condition self-adaptive simulator comprises a single chip microcomputer, a programmable logic array, a liquid crystal display unit, an input/output interface circuit, a feeder working condition simulation circuit and a self-adaptive control interface circuit;
the single chip microcomputer is electrically connected with the liquid crystal display unit, the input/output interface circuit and the programmable logic array, the feeder line working condition simulation circuit and the self-adaptive control interface circuit are electrically connected with the programmable logic array, the feeder line working condition simulation circuit is electrically connected with an external PT power supply and a tested terminal, the self-adaptive control interface circuit is electrically connected with the tested terminal, and the input/output interface circuit is electrically connected with the tested terminal.
2. The FA FDA method according to claim 1, wherein the FA FDA method for testing feeder segment permanent faults in the FA FDA method comprises:
a. an outgoing switch injects overcurrent into a main tester, the outgoing switch trips to cut off fault current, the outgoing switch is superposed for the first time after short delay, all section switches are sequentially switched on, the outgoing switch injects overcurrent into the main tester again after an upstream boundary switch of a fault section is switched on, the outgoing switch trips again to cut off the fault, the upstream boundary switch is locked due to power loss in Y time limit, a slave tester at the downstream boundary section switch of the fault section simulates short-time incoming residual voltage, and the switch is locked;
b. the outgoing line switches are overlapped for the second time after long time delay, all the section switches are sequentially switched on, the boundary switch at the upstream of the fault section is required to be positioned at a locking position and not switched on, and the upstream power supply is recovered;
c. the interconnection switch is switched on after one side is in power failure and delayed, the related section switches are switched on in sequence, the boundary switch at the downstream of the fault section is required to be positioned at a locking position and not switched on, and the downstream is restored to supply power;
d. and (4) switching off is operated on the interconnection switch terminal, switching on is sequentially operated at the upstream boundary switch and the downstream boundary switch terminal of the fault section, normal power supply is recovered, and the locking state is automatically released.
3. The FA testing method according to claim 1, wherein the FA testing method for testing the sectional permanent faults of the feeder line in the FA testing method comprises:
a. an outgoing line switch injects overcurrent into a main tester, overcurrent is synchronously injected from the tester at each feeder terminal position at the upstream of a fault section, the outgoing line switch trips to cut off fault current, the outgoing line switch is firstly superposed after short delay, each section switch is sequentially switched on, the outgoing line switch injects overcurrent into the main tester again after the boundary switch at the upstream of the fault section is switched on, the outgoing line switch trips again to cut off the fault, the boundary switch at the upstream is switched off and locked within Y time limit, the slave tester at the boundary section switch at the downstream of the fault section simulates short-time incoming residual voltage, and the switch is required to be locked;
b. the outgoing line switches are overlapped for the second time after long time delay, all the section switches are sequentially switched on, the boundary switch at the upstream of the fault section is required to be positioned at a locking position and not switched on, and the upstream power supply is recovered;
c. the interconnection switch is switched on after one side is in power failure and delayed, the related section switches are switched on in sequence, the boundary switch at the downstream of the fault section is required to be positioned at a locking position and not switched on, and the downstream is restored to supply power;
d. and (4) switching off is operated on the interconnection switch terminal, switching on is sequentially operated at the upstream boundary switch and the downstream boundary switch terminal of the fault section, normal power supply is recovered, and the locking state is automatically released.
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| CN109765439A (en) * | 2018-12-07 | 2019-05-17 | 国网宁夏电力有限公司电力科学研究院 | Feeder test method based on secondary singal |
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| CN110971000A (en) * | 2019-12-09 | 2020-04-07 | 广东电网有限责任公司汕尾供电局 | Automatic constant value setting system for feeder and setting method thereof |
| CN112949034A (en) * | 2021-01-28 | 2021-06-11 | 贵州电网有限责任公司 | Power distribution network in-place FA secondary operation simulation system and method |
| CN112924862B (en) * | 2021-01-28 | 2024-05-03 | 贵州电网有限责任公司 | System and method for detecting primary side fault injection (FA) |
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| CN116345420B (en) * | 2023-05-12 | 2023-10-27 | 珠海许继电气有限公司 | Communication transfer processing method and system for distribution line faults |
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