CN112285492B - Power distribution network ground fault test system and method - Google Patents
Power distribution network ground fault test system and method Download PDFInfo
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- CN112285492B CN112285492B CN202011610673.0A CN202011610673A CN112285492B CN 112285492 B CN112285492 B CN 112285492B CN 202011610673 A CN202011610673 A CN 202011610673A CN 112285492 B CN112285492 B CN 112285492B
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
Abstract
The invention discloses a system and a method for testing ground faults of a power distribution network, wherein the system comprises the following steps: the method comprises the steps that a control terminal obtains a test request for indicating a selected ground fault test in ground fault tests simulating power distribution network with multiple structures, generates first configuration data based on the test request and sends the first configuration data to a power distribution network structure switching device, and generates second configuration data based on the test request and sends the second configuration data to the ground fault test device; the power distribution network structure switching device switches the power distribution network into the power distribution network meeting the test request according to the first configuration data; and the ground fault test device switches the ground fault into the ground fault meeting the test request according to the second configuration data so as to realize the simulation of the selected ground fault test. The method and the system for the ground fault test have good economy and applicability, and meet the examination and detection requirements of various distribution network equipment under different distribution network environments.
Description
Technical Field
The invention relates to the technical field of power distribution network tests, in particular to a power distribution network ground fault test system and a power distribution network ground fault test method.
Background
The single-phase earth fault is a line fault which often occurs in the operation process of a power distribution network, when the fault occurs, fault points are generally required to be quickly found through line selection, section selection and phase selection equipment, for effectively verifying the fault processing correctness of intelligent equipment, the real fault condition needs to be simulated in the line, however, the voltage of a 10kV side is higher, different grid structures and different load levels exist in a real power grid, various earth scenes such as sand, cement, soil, grassland and ponds need to be simulated, the simulation test of actual fault has large workload, the implementation is difficult, and the problems of potential safety hazards and the like exist. Most of the existing single-phase earth faults are developed on an actual power distribution network frame, a power failure plan needs to be arranged during the test, and meanwhile, a substitution scheme of a corresponding fault type is searched on site. The national grid, Hubei province electric power company, electric power science research institute adopts the mode of water resistance to simulate the earth fault of different scenes, obtains good effect, but has a series of problems such as the field work volume is big, the device is installed inconveniently, need have a power failure. In the prior art, water resistance is adopted as a ground fault transition resistance, a water resistance box is connected into a net rack after a system is powered off, and various ground fault scenes such as sand stones, cement, soil, grasslands, ponds and the like are simulated by adjusting the resistance value of the water resistance. However, water resistance equipment is large in volume, the resistance value is unstable, the installation is difficult, and the maintenance is inconvenient.
The existing true power distribution network laboratory can only realize a simplest power distribution network architecture, namely, a single-radiation overhead line, only devices such as a power supply, an overhead line and a switch, and the network architecture cannot be changed without load. The distribution network in China has a complex and changeable network architecture, and can be divided into overhead lines and cable lines according to current-carrying conductors. The pure overhead line can be divided into a single-radiation, tail-end connection, multi-section moderate connection, two-supply one-standby and three-supply one-standby framework; the pure electric cable line can be divided into a single-emission type, a correlation type, a double-emission type, a single-ring network, a double-ring network, a two-supply one-standby architecture and a three-supply one-standby architecture; for urban power grids, hybrid aerial-cable architectures also exist. When a power distribution network fails, the amplitudes and phases of parameters such as voltage, current, zero voltage, zero current and the like of each line are changed in different degrees and different characteristics due to different network architectures, and complex association is generated among the parameters. Therefore, it is obvious that a true distribution network laboratory is only equipped with a network architecture, and the requirements of equipment detection and scientific research cannot be met. The cable line cannot be realized due to the construction without places, and then the series-parallel line cannot be realized.
Therefore, a device capable of realizing ground fault tests under power distribution network with different structures is needed.
Disclosure of Invention
The invention provides a power distribution network ground fault test device and a power distribution network ground fault test method, which aim to solve the problem of how to realize ground fault tests under power distribution network networks with different structures.
In order to solve the above problem, according to an aspect of the present invention, there is provided a power distribution network ground fault testing system, the system including:
the control terminal is used for acquiring a test request for indicating and simulating a selected ground fault test in ground fault tests in a power distribution network with multiple structures, generating first configuration data based on the test request and sending the first configuration data to the power distribution network structure switching device, and generating second configuration data based on the test request and sending the second configuration data to the ground fault test device;
the power distribution network structure switching device is used for switching a power distribution network into a power distribution network meeting the test request according to the first configuration data;
and the ground fault test device is used for switching the ground fault into the ground fault meeting the test request according to the second configuration data so as to realize the simulation of the selected ground fault test.
Preferably, the power distribution network with various structures comprises: a distribution network of a pure cable network, a distribution network of a pure overhead network or a distribution network of an overhead cable hybrid network.
Preferably, the power distribution network structure switching device includes:
the overhead network power supply unit is connected with the interconnection switch unit and used for supplying power to a feeder line of the overhead line;
the cable network power supply unit is connected with the interconnection switch unit and used for supplying power to a feeder line of a cable line;
the control unit is connected with the interconnection switch unit and used for controlling at least one switch in the interconnection switch unit based on the first configuration data so as to switch a power distribution network to meet the test request according to the overhead network power supply unit and the cable network power supply unit;
and the interconnection switch unit is used for switching the power distribution network structure into the power distribution network structure meeting the test request according to the overhead network power supply unit and the cable network power supply unit.
Preferably, wherein
The overhead network power supply unit includes: the system comprises an overhead network power supply, a first incoming switch, an overhead line bus and at least one overhead feeder line, wherein the first incoming switch, the overhead line bus and the at least one overhead feeder line are arranged in an overhead line power switch station;
the cable network power supply unit includes: the cable network power supply comprises a cable network power supply source, and a second incoming line switch, a cable bus and at least one cable feeder which are arranged in a cable power switch station, wherein a second outgoing line switch is configured at the head end of each cable feeder.
Preferably, the ground fault testing apparatus includes: the device comprises a main grounding switch unit, a main control switch unit, at least one fault control switch unit and at least one resistance unit;
the main grounding switch unit is respectively connected with a feeder line of an overhead line or a feeder line of a cable line and the main control switch unit and is used for realizing the connection or disconnection between the grounding fault test system and the ground;
the main control switch unit is respectively connected with the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit and is used for realizing the conduction or the disconnection between the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit;
each fault control switch unit is connected in parallel and is connected with one end of one resistance unit, and the other end of each resistance unit is arranged in a ground fault simulation area corresponding to the resistance unit; and the fault control switch unit is used for realizing the connection or disconnection between the main control switch unit and the resistance unit.
Preferably, the master switch unit includes: the system comprises a main circuit breaker upper isolation disconnecting link, a main circuit breaker and a main circuit breaker lower isolation disconnecting link which are connected in sequence; the isolation disconnecting link on the main circuit breaker is respectively connected with a feeder line of an overhead line or a feeder line of a cable line; and the lower isolation disconnecting link of the main breaker is connected with each fault control switch unit through a parallel lead.
Preferably, wherein each fault control switch unit comprises: the upper isolation disconnecting link of the fault simulation area circuit breaker, the fault simulation area circuit breaker and the lower isolation disconnecting link of the fault simulation area circuit breaker are sequentially connected; the upper isolation disconnecting link of the fault simulation area circuit breaker is connected with the main control switch unit through a parallel lead, and the lower isolation disconnecting link of the fault simulation area circuit breaker is connected with the resistance unit.
According to another aspect of the invention, a power distribution network ground fault test method is provided, which comprises the following steps:
the method comprises the steps that a control terminal obtains a test request for indicating a selected ground fault test in ground fault tests simulating power distribution network with multiple structures, generates first configuration data based on the test request and sends the first configuration data to a power distribution network structure switching device, and generates second configuration data based on the test request and sends the second configuration data to the ground fault test device;
the power distribution network structure switching device switches a power distribution network into a power distribution network meeting the test request according to the first configuration data;
the ground fault test device switches the ground fault into the ground fault meeting the test request according to the second configuration data so as to realize the simulation of the selected ground fault test;
wherein, the distribution network structure switching device switches the distribution network to the distribution network meeting the test request according to the first configuration data, and comprises:
the overhead network power supply unit is used for supplying power to a feeder line of the overhead line;
a cable network power supply unit is used for supplying power to a feeder line of a cable line;
controlling at least one switch in the interconnection switch units by using a control unit based on the first configuration data so as to switch a power distribution network to meet the test request according to the overhead network power supply unit and the cable network power supply unit;
and switching the power distribution network structure into the power distribution network structure meeting the test request according to the overhead network power supply unit and the cable network power supply unit by using the interconnection switch unit.
Preferably, the power distribution network with various structures comprises: a distribution network of a pure cable network, a distribution network of a pure overhead network or a distribution network of an overhead cable hybrid network.
Preferably, the switching device of the power distribution network structure switches the power distribution network to the power distribution network meeting the test request according to the first configuration data, and includes:
the overhead network power supply unit is used for supplying power to a feeder line of the overhead line;
a cable network power supply unit is used for supplying power to a feeder line of a cable line;
controlling at least one switch in the interconnection switch units by using a control unit based on the first configuration data so as to switch a power distribution network to meet the test request according to the overhead network power supply unit and the cable network power supply unit;
and switching the power distribution network structure into the power distribution network structure meeting the test request according to the overhead network power supply unit and the cable network power supply unit by using the interconnection switch unit.
Preferably, the method further comprises:
the overhead network power supply unit is internally provided with an overhead network power supply source, a first incoming switch, an overhead line bus and at least one overhead feeder line, wherein the first incoming switch, the overhead line bus and the at least one overhead feeder line are positioned in an overhead line power switch station;
the cable network power supply unit is internally provided with a cable network power supply source, a second incoming switch, a cable bus and at least one cable feeder which are positioned in the cable power switch station, and the head end of each cable feeder is provided with a second outgoing switch.
Preferably, a general grounding switch unit, a main control switch unit, at least one fault control switch unit and at least one resistance unit are arranged in the ground fault test device;
the main grounding switch unit is respectively connected with a feeder line of an overhead line or a feeder line of a cable line and the main control switch unit, and the main grounding switch unit is used for realizing the connection or disconnection between the grounding fault test system and the ground;
connecting a main control switch unit with a feeder line of an overhead line or a feeder line of a cable line and the fault control switch unit respectively, and realizing the conduction or disconnection between the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit by using the main control switch unit;
each fault control switch unit is arranged in parallel and is connected with one end of one resistance unit, and the other end of each resistance unit is arranged in a ground fault simulation area corresponding to the resistance unit; and the fault control switch unit is used for realizing the connection or disconnection between the main control switch unit and the resistance unit.
Preferably, the master switch unit includes: the system comprises a main circuit breaker upper isolation disconnecting link, a main circuit breaker and a main circuit breaker lower isolation disconnecting link which are connected in sequence; the isolation disconnecting link on the main circuit breaker is respectively connected with a feeder line of an overhead line or a feeder line of a cable line; and connecting the lower isolation disconnecting link of the main breaker with each fault control switch unit through a parallel lead.
Preferably, wherein each fault control switch unit comprises: the upper isolation disconnecting link of the fault simulation area circuit breaker, the fault simulation area circuit breaker and the lower isolation disconnecting link of the fault simulation area circuit breaker are sequentially connected; the upper isolation disconnecting link of the fault simulation area circuit breaker is connected with the main control switch unit through a parallel lead, and the lower isolation disconnecting link of the fault simulation area circuit breaker is connected with the resistance unit.
The invention provides a power distribution network ground fault test system and a power distribution network ground fault test method, which can be used for combining and controlling the on-off of a plurality of switches based on a reasonable switch arrangement mode determined by a control terminal by taking a simple overhead line and a cable line as a basic network frame in limited land resources, thereby realizing the erection of power distribution network networks with various structures, and simulating different types of ground faults by connecting a ground fault test device at a certain feeder line, thereby realizing the simulation of different ground fault tests under the power distribution network with various pure overhead network structures, various pure cable network structures and various overhead cable mixed network structures; the method and the system for carrying out the ground fault test have good economy and applicability, can reproduce complex and variable distribution network environments, furthest restore the fault scene of a real distribution network, and meet the examination and detection requirements of various distribution network devices in different distribution network environments.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a schematic structural diagram of a power distribution network ground fault testing system 100 according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a switching device of a power distribution network structure according to an embodiment of the invention;
fig. 3 is a schematic diagram of a power distribution network in a pure overhead network configuration according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a power distribution network of an overhead cable hybrid network structure according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a ground fault testing apparatus according to an embodiment of the present invention;
fig. 6 is a top view of a mobile resistance device including a plurality of resistance units according to an embodiment of the present invention;
fig. 7 is a side view of a mobile resistance device including a plurality of resistance units according to an embodiment of the present invention;
fig. 8 is a flow chart of a method 800 for testing a ground fault of a power distribution network according to an embodiment of the invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a schematic structural diagram of a power distribution network ground fault testing system 100 according to an embodiment of the present invention. As shown in fig. 1, the power distribution network ground fault test system provided by the embodiment of the invention can be used for controlling the on-off of a plurality of switches in a combined manner based on a reasonable switch arrangement mode determined by a control terminal by using a simple overhead line and a cable line as a basic network frame in a limited land resource, so as to realize the erection of power distribution network networks with various structures, and simulating different types of ground faults by connecting a ground fault test device at a certain feeder line, so as to realize the simulation of different ground fault tests under the power distribution network with various pure overhead network structures, various pure cable network structures and various overhead cable mixed network structures; the method has good economy and applicability, can reproduce complex and changeable distribution network environments, furthest restore the fault scene of the real distribution network, and meet the examination and detection requirements of various distribution network devices in different distribution network environments. The power distribution network ground fault test system 100 provided by the embodiment of the invention comprises: control terminal 101, distribution network structure switching device 102, ground fault test device 103.
Preferably, the control terminal 101 is configured to obtain a test request indicating a selected ground fault test in ground fault tests in a power distribution network simulating multiple structures, generate first configuration data based on the test request and send the first configuration data to the power distribution network structure switching device, and generate second configuration data based on the test request and send the second configuration data to the ground fault test device.
Preferably, the power distribution network with various structures comprises: a distribution network of a pure cable network, a distribution network of a pure overhead network or a distribution network of an overhead cable hybrid network.
Preferably, the distribution network structure switching device 102 is configured to switch the distribution network to the distribution network meeting the test request according to the first configuration data.
Preferably, the power distribution network structure switching device includes:
the overhead network power supply unit is connected with the interconnection switch unit and used for supplying power to a feeder line of the overhead line;
the cable network power supply unit is connected with the interconnection switch unit and used for supplying power to a feeder line of a cable line;
the control unit is connected with the interconnection switch unit and used for controlling at least one switch in the interconnection switch unit based on the first configuration data so as to switch a power distribution network to meet the test request according to the overhead network power supply unit and the cable network power supply unit;
and the interconnection switch unit is used for switching the power distribution network structure into the power distribution network structure meeting the test request according to the overhead network power supply unit and the cable network power supply unit.
Preferably, the overhead network power supply unit comprises: the system comprises an overhead network power supply, a first incoming switch, an overhead line bus and at least one overhead feeder line, wherein the first incoming switch, the overhead line bus and the at least one overhead feeder line are arranged in an overhead line power switch station;
the cable network power supply unit includes: the cable network power supply comprises a cable network power supply source, and a second incoming line switch, a cable bus and at least one cable feeder which are arranged in a cable power switch station, wherein a second outgoing line switch is configured at the head end of each cable feeder.
Fig. 2 is a schematic diagram of a switching device for a power distribution network structure according to an embodiment of the invention. As shown in fig. 2, the switching device for the distribution network structure is located in a laboratory (1), and comprises: the system comprises a cable network power supply unit comprising a power supply (2) and a cable line power switch station (5), an overhead network power supply unit comprising the power supply (2) and an overhead line power switch station (6), a communication switch station (7), various switches, a load (8) and a control unit (9). The overhead line power switch station is internally provided with a first incoming switch, an overhead line bus and an overhead line (3), the overhead line comprises at least one overhead feeder line, and the head end of each overhead feeder line is provided with a first outgoing switch. The cable line comprises at least one cable feeder line, and a second outgoing switch is configured at the head end of each cable feeder line. Can control cable conductor switch station (5), overhead line switch station (6), interconnection switch station (7) and the closure and the disconnection of all kinds of switches through can be long-rangely in control unit (9), through carrying out regular combination operation to all switches in the laboratory range, can realize the switching of multiple overhead network structure, multiple cable network structure and overhead cable mixed rack structure in limited laboratory (1) area. The interconnection switches are numbered according to L-N, the switches on the overhead line are numbered according to J-N, and the switches on the cable line are numbered according to D-N.
As shown in fig. 2, in the embodiment of the present invention, the power source (2) is a large-capacity power source for a real power distribution network, and the specific carrier may be one or more of a power transformer, a power electronic transformer or a new energy power generation device. The information content of the power supply (2) can be uploaded to a control unit (9).
The number of the overhead lines (3) and the number of the cable lines (4) are configured as required, related equipment such as section switches, branch switches, switches arranged in a ring net cage, branch boxes, current transformers, voltage transformers and the like are configured according to real lines, contact can be achieved between any two lines, the specific representation form can be achieved by configuring contact switches (L-N), and the contact switches (L-N) can be remotely communicated, telemetered and controlled in a control unit (9). The laboratory shown in fig. 2 includes 2 overhead lines and 2 cable lines, wherein the 2 overhead lines are connected and disconnected through L1-L3 or L4-L6, the 2 cable lines are connected and disconnected through L7-L9 or L10-L12, and the overhead lines and the cable lines are connected and disconnected through L1, L3, L4, L6, L7, L9, L10, L12 and switches of the ring main unit 10.
Wherein, cable conductor switch station (5) are located cable circuit (4) head end, the inlet wire side of cable conductor switch station (5) connects power (2), all cable circuit (4) are connected to the side of being qualified for the next round of competitions of cable conductor switch station (5), except according to the typical design configuration of switch station necessary equipment in the station, should guarantee at least that cable conductor switch station (5) are furnished with a service entrance switch, and every cable circuit head end disposes a switch of being qualified for the next round of competitions, and this switch can be in control unit (9) by remote signalling, telemetering measurement and remote control. Taking a cable line in fig. 2 as an example, D-1 is an incoming switch of a cable power switch station (5), and D-2 and D-3 are head-end switches of 2 cables outgoing lines in the station.
The power supply switching station for the overhead line is characterized in that the power supply switching station for the overhead line (6) is located at the head end of the overhead line (3), an incoming line side switch of the power supply switching station for the overhead line (6) is connected with a power supply (2), all the overhead lines (3) are connected with an outgoing line side of the power supply switching station for the overhead line (6), necessary equipment is configured in the station according to typical design of the switching station, at least one incoming line switch is configured on the power supply switching station for the overhead line (6), one outgoing line switch is configured at the head end of each overhead line, and the switches can be remotely signaled, remotely monitored and remotely controlled by a control unit (9). Taking an overhead line in fig. 2 as an example, J-1 is an incoming switch of an overhead line power switch station (5), and J-2 and J-3 are head-end switches of 2 overhead outgoing lines in the station.
The interconnection switching station (7) is positioned at the tail ends of all lines, at least two interconnection buses are arranged in the interconnection switching station (7), all the tail ends of the lines contained in the overhead line (3) and the cable line (4) are respectively connected with each interconnection bus, the interconnection switching station (7) is at least provided with an incoming line switch before the tail end of each line is connected into any one of the interconnection buses except that necessary equipment is arranged according to the typical design of the switching station, and the incoming line switch can be remotely communicated, telemetered and controlled by the control unit (9). Taking an overhead line access (7) in fig. 2 as an example, J-8 is a service entrance switch of the 1 st bus of the overhead line end access (7), and J-34 is a service entrance switch of the 2 nd bus of the overhead line end access (7); taking a cable line access (7) in fig. 1 as an example, J-9 is a service switch of the 1 st bus line accessed (7) at the end of the cable line, and J-35 is a service switch of the 2 nd bus line accessed (7) at the end of the cable line.
The load (8) is a real load of the power distribution network, can be connected to the tail end of the line, and can also be connected to branches of different sections of the line through branch switches, and the specific carrier can be a traditional load such as a resistor, an inductor and a capacitor which are independently adjustable, a motor, a power electronic device and the like or a load with a reverse power transmission function. The visual conditions of the load (8) are remotely signaled, remotely controlled and remotely measured at the control unit (9).
The control unit (9) is a control center, can remotely signal, remotely control and remotely measure all switches installed in the laboratory, and displays the current state of each device in the laboratory range.
In order to flexibly reproduce various network architectures, the states of all switches in a laboratory when the network architecture is realized need to be determined according to the required network architecture, and the switches are manually operated remotely by a control unit (9) or on site at each switch station, so that the switching of various overhead network structures, various cable network structures and overhead cable mixed grid structures is realized. Based on the power distribution network switching device in fig. 2, after the test request is determined, a pure 4 overhead line single-shot network shown in fig. 3 can be formed by switching according to the first configuration data, and then switching is performed based on the first configuration data determined by the new test request, and a power distribution network with an overhead cable hybrid structure shown in fig. 4 can also be formed. Wherein, the switch marked by the solid rectangle represents that the switch is in a closed state, and the switch marked by the hollow rectangle represents that the switch is in an open state.
Preferably, the ground fault testing device 103 is configured to switch a ground fault to a ground fault meeting the test request according to the second configuration data, so as to implement simulation of the selected ground fault test.
Preferably, the ground fault testing apparatus includes: the device comprises a main grounding switch unit, a main control switch unit, at least one fault control switch unit and at least one resistance unit;
the main grounding switch unit is respectively connected with a feeder line of an overhead line or a feeder line of a cable line and the main control switch unit and is used for realizing the connection or disconnection between the grounding fault test system and the ground;
the main control switch unit is respectively connected with the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit and is used for realizing the conduction or the disconnection between the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit;
each fault control switch unit is connected in parallel and is connected with one end of one resistance unit, and the other end of each resistance unit is arranged in a ground fault simulation area corresponding to the resistance unit; and the fault control switch unit is used for realizing the connection or disconnection between the main control switch unit and the resistance unit.
Preferably, the master switch unit includes: the system comprises a main circuit breaker upper isolation disconnecting link, a main circuit breaker and a main circuit breaker lower isolation disconnecting link which are connected in sequence; the isolation disconnecting link on the main circuit breaker is respectively connected with a feeder line of an overhead line or a feeder line of a cable line; and the lower isolation disconnecting link of the main breaker is connected with each fault control switch unit through a parallel lead.
Preferably, wherein each fault control switch unit comprises: the upper isolation disconnecting link of the fault simulation area circuit breaker, the fault simulation area circuit breaker and the lower isolation disconnecting link of the fault simulation area circuit breaker are sequentially connected; the upper isolation disconnecting link of the fault simulation area circuit breaker is connected with the main control switch unit through a parallel lead, and the lower isolation disconnecting link of the fault simulation area circuit breaker is connected with the resistance unit.
In the embodiment of the invention, T is arranged at the feeder line and is connected with the ground fault testing device. The ground fault test device comprises a main ground switch unit, a main control switch unit, at least one fault control switch unit and at least one resistance unit.
As shown in fig. 5, the ground fault test apparatus includes: 10kV buses (namely feeders); a total grounding disconnecting link (namely a total grounding switch unit); isolation knife switch on the main breaker; fourthly, a main breaker; isolating the disconnecting link under the main breaker; sixthly, connecting the 10kV fault device in parallel with a lead wire; seventhly, isolating a knife switch on the breaker in the fault simulation area; eighthly, a fault simulation area circuit breaker; ninthly, isolating the disconnecting link under the breaker in the fault simulation area; a plurality of moving resistor boxes (i.e., resistor units); ⑪ ground fault simulation zone.
As shown in fig. 6, it is a top view of a mobile resistor device comprising a plurality of resistor units, wherein, is a resistor with a resistance of 1000 ohms and a rated capacity of 10 kW; a detachable connecting lead wire; thirdly, a supporting steel plate; and fourthly, the lead connector.
As shown in fig. 7, a side view of a mobile resistor apparatus including a plurality of resistor units, wherein (r) is a resistor having a resistance of 1000 ohms and a rated capacity of 10 kW; ② a lead joint; and thirdly, a 10kV post insulator.
In the embodiment of the invention, two isolation disconnecting switches are respectively arranged on the upper side and the lower side of the circuit breaker for the main control switch unit and the fault control switch power supply to play a role of double protection, and when fault wiring is carried out, the upper isolation disconnecting switch or the lower isolation disconnecting switch of the circuit breaker needs to be disconnected. The grounding knife switch is arranged on the front side of the isolation knife switch, and the grounding knife switch needs to be switched on during maintenance. The resistance value of the movable resistance box can be adjusted from 0 ohm to 5000 ohm. The movable resistance box can be directly connected with a ground grid of the test system and can also be grounded with different ground fault simulation areas.
The invention can reproduce the earth faults of various 10kV power distribution networks. For example, simulating the fault that 10kV line A is disconnected and then falls into a pond under an overhead line single radiation grid structure, setting the grid structure into a single radiation structure according to a graph 3, then setting a fault point from a feeder T, closing switches III, IV and V in the graph 5, closing the switch of a pond grounding fault branch line, opening the switches of other fault branch lines, closing upper and lower isolation disconnecting switches of the pond grounding fault A branch line, opening isolation disconnecting switches of other branch lines, moving the movable resistance box to a pond fault area, connecting the upper layer resistance of the movable resistance box, adopting a 3-3 string mode to enable the resistance of the whole resistance box to be 1000 ohms, connecting the tail end of the isolation disconnecting switch under the pond grounding fault A branch line with a ground wire and the head end of the movable resistance box, connecting the tail end of the movable resistance box with the ground wire, placing the ground wire into a pond in the pond fault area, and (3) the whole 10kV distribution network ground fault simulation system is powered on, and the fault that the A phase falls into the pond after being disconnected in the single-radiation grid structure is reproduced.
Because of the consideration of covering all power distribution network architectures, an overhead line power supply switching station, a cable line power supply switching station and a communication switching station are arranged. For a complex network architecture, a switching station is required to be built for realization, but for a slightly simple network architecture or a subminiature power distribution network laboratory with low functional requirements, only 2 to 3 outgoing lines are needed, the number of required switches is small, and the switching of a plurality of simple network architectures can be realized by directly installing 1 or a plurality of circuit breakers. Meanwhile, the ninthly-number isolation switch in the figure 1 can be removed, so that the manufacturing cost of the testing device is reduced, and the testing safety risk can be improved.
The power distribution network ground fault test system has the functions of flexibly switching the structure of a power distribution network, switching various single-phase ground fault scenes and freely adjusting the ground fault resistance. The design can finish the recurrence of various ground faults which may occur in different actual power distribution networks only by a small amount of equipment, protects the function of life safety of testers to the maximum extent, has the advantages of simple structure, convenience in operation, good economy and the like, and can be applied to different test scenes.
Fig. 8 is a flow chart of a method 800 for testing a ground fault of a power distribution network according to an embodiment of the invention. As shown in fig. 8, a power distribution network ground fault test method 800 provided by the embodiment of the present invention is applicable to a power distribution network ground fault test system, where the system includes: and the control terminal is respectively connected with the power distribution network structure switching device and the ground fault test device, and the ground fault test device is connected with the power distribution network structure switching device. In a power distribution network ground fault test method 800 provided by the embodiment of the present invention, starting from step 801, in step 801, a control terminal obtains a test request indicating a selected ground fault test in ground fault tests simulating power distribution network networks of multiple structures, generates first configuration data based on the test request and sends the first configuration data to a power distribution network structure switching device, and generates second configuration data based on the test request and sends the second configuration data to a ground fault test device.
Preferably, the power distribution network with various structures comprises: a distribution network of a pure cable network, a distribution network of a pure overhead network or a distribution network of an overhead cable hybrid network.
In step 802, the distribution network structure switching device switches the distribution network to the distribution network meeting the test request according to the first configuration data.
Preferably, the switching device of the power distribution network structure switches the power distribution network to the power distribution network meeting the test request according to the first configuration data, and includes:
the overhead network power supply unit is used for supplying power to a feeder line of the overhead line;
a cable network power supply unit is used for supplying power to a feeder line of a cable line;
controlling at least one switch in the interconnection switch units by using a control unit based on the first configuration data so as to switch a power distribution network to meet the test request according to the overhead network power supply unit and the cable network power supply unit;
and switching the power distribution network structure into the power distribution network structure meeting the test request according to the overhead network power supply unit and the cable network power supply unit by using the interconnection switch unit.
Preferably, the overhead network power supply unit comprises: the system comprises an overhead network power supply, a first incoming switch, an overhead line bus and at least one overhead feeder line, wherein the first incoming switch, the overhead line bus and the at least one overhead feeder line are arranged in an overhead line power switch station;
the cable network power supply unit includes: the cable network power supply comprises a cable network power supply source, and a second incoming line switch, a cable bus and at least one cable feeder which are arranged in a cable power switch station, wherein a second outgoing line switch is configured at the head end of each cable feeder.
In step 803, the ground fault testing apparatus switches the ground fault to the ground fault satisfying the test request according to the second configuration data, so as to realize the simulation of the selected ground fault test.
Preferably, the ground fault testing apparatus includes: the device comprises a main grounding switch unit, a main control switch unit, at least one fault control switch unit and at least one resistance unit;
the main grounding switch unit is respectively connected with a feeder line of an overhead line or a feeder line of a cable line and the main control switch unit, and the main grounding switch unit is used for realizing the connection or disconnection between the grounding fault test system and the ground;
connecting a main control switch unit with a feeder line of an overhead line or a feeder line of a cable line and the fault control switch unit respectively, and realizing the conduction or disconnection between the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit by using the main control switch unit;
each fault control switch unit is arranged in parallel and is connected with one end of one resistance unit, and the other end of each resistance unit is arranged in a ground fault simulation area corresponding to the resistance unit; and the fault control switch unit is used for realizing the connection or disconnection between the main control switch unit and the resistance unit.
Preferably, the master switch unit includes: the system comprises a main circuit breaker upper isolation disconnecting link, a main circuit breaker and a main circuit breaker lower isolation disconnecting link which are connected in sequence; the isolation disconnecting link on the main circuit breaker is respectively connected with a feeder line of an overhead line or a feeder line of a cable line; and connecting the lower isolation disconnecting link of the main breaker with each fault control switch unit through a parallel lead.
Preferably, wherein each fault control switch unit comprises: the upper isolation disconnecting link of the fault simulation area circuit breaker, the fault simulation area circuit breaker and the lower isolation disconnecting link of the fault simulation area circuit breaker are sequentially connected; the upper isolation disconnecting link of the fault simulation area circuit breaker is connected with the main control switch unit through a parallel lead, and the lower isolation disconnecting link of the fault simulation area circuit breaker is connected with the resistance unit.
The power distribution network ground fault test method 800 according to the embodiment of the present invention corresponds to the power distribution network ground fault test system 100 according to another embodiment of the present invention, and is not described herein again.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (8)
1. A power distribution network ground fault testing system, the system comprising:
the control terminal is used for acquiring a test request for indicating and simulating a selected ground fault test in ground fault tests in a power distribution network with multiple structures, generating first configuration data based on the test request and sending the first configuration data to the power distribution network structure switching device, and generating second configuration data based on the test request and sending the second configuration data to the ground fault test device;
the power distribution network structure switching device is used for switching a power distribution network into a power distribution network meeting the test request according to the first configuration data;
the ground fault test device is used for switching the ground fault into the ground fault meeting the test request according to the second configuration data so as to realize the simulation of the selected ground fault test;
wherein, ground fault test device includes: the device comprises a main grounding switch unit, a main control switch unit, at least one fault control switch unit and at least one resistance unit;
the main grounding switch unit is respectively connected with a feeder line of an overhead line or a feeder line of a cable line and the main control switch unit and is used for realizing the connection or disconnection between the grounding fault test system and the ground;
the main control switch unit is respectively connected with the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit and is used for realizing the conduction or the disconnection between the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit;
each fault control switch unit is connected in parallel and is connected with one end of one resistance unit, and the other end of each resistance unit is arranged in a ground fault simulation area corresponding to the resistance unit; the fault control switch unit is used for realizing the connection or disconnection between the main control switch unit and the resistance unit;
the master switch unit includes: the system comprises a main circuit breaker upper isolation disconnecting link, a main circuit breaker and a main circuit breaker lower isolation disconnecting link which are connected in sequence; the isolation disconnecting link on the main circuit breaker is respectively connected with a feeder line of an overhead line or a feeder line of a cable line; the lower isolation disconnecting link of the main circuit breaker is connected with each fault control switch unit through a parallel lead;
wherein, every fault control switch unit includes: the upper isolation disconnecting link of the fault simulation area circuit breaker, the fault simulation area circuit breaker and the lower isolation disconnecting link of the fault simulation area circuit breaker are sequentially connected; the upper isolation disconnecting link of the fault simulation area circuit breaker is connected with the main control switch unit through a parallel lead, and the lower isolation disconnecting link of the fault simulation area circuit breaker is connected with the resistance unit;
the resistors in the plurality of resistor units are connected through detachable connecting leads; the resistance value of the movable resistance box is adjustable from 0 ohm to 5000 ohm in a step mode; the ground fault simulation zone includes: the system comprises a sandstone ground fault simulation area, a cement ground fault simulation area, a soil ground fault simulation area, a pond ground fault simulation area, a grassland ground fault simulation area and an asphalt ground fault simulation area.
2. The system of claim 1, wherein the multiple configurations of the power distribution network comprise: a distribution network of a pure cable network, a distribution network of a pure overhead network or a distribution network of an overhead cable hybrid network.
3. The system of claim 1, wherein the power distribution network configuration switching device comprises:
the overhead network power supply unit is connected with the interconnection switch unit and used for supplying power to a feeder line of the overhead line;
the cable network power supply unit is connected with the interconnection switch unit and used for supplying power to a feeder line of a cable line;
the control unit is connected with the interconnection switch unit and used for controlling at least one switch in the interconnection switch unit based on the first configuration data so as to switch a power distribution network to meet the test request according to the overhead network power supply unit and the cable network power supply unit;
and the interconnection switch unit is used for switching the power distribution network structure into the power distribution network structure meeting the test request according to the overhead network power supply unit and the cable network power supply unit.
4. The system of claim 3,
the overhead network power supply unit includes: the system comprises an overhead network power supply, a first incoming switch, an overhead line bus and at least one overhead feeder line, wherein the first incoming switch, the overhead line bus and the at least one overhead feeder line are arranged in an overhead line power switch station;
the cable network power supply unit includes: the cable network power supply comprises a cable network power supply source, and a second incoming line switch, a cable bus and at least one cable feeder which are arranged in a cable power switch station, wherein a second outgoing line switch is configured at the head end of each cable feeder.
5. A power distribution network ground fault test method is characterized by comprising the following steps:
the method comprises the steps that a control terminal obtains a test request for indicating a selected ground fault test in ground fault tests simulating power distribution network with multiple structures, generates first configuration data based on the test request and sends the first configuration data to a power distribution network structure switching device, and generates second configuration data based on the test request and sends the second configuration data to the ground fault test device;
the power distribution network structure switching device switches a power distribution network into a power distribution network meeting the test request according to the first configuration data;
the ground fault test device switches the ground fault into the ground fault meeting the test request according to the second configuration data so as to realize the simulation of the selected ground fault test;
wherein the method further comprises:
a main grounding switch unit, a main control switch unit, at least one fault control switch unit and at least one resistance unit are arranged in the grounding fault test device;
the main grounding switch unit is respectively connected with a feeder line of an overhead line or a feeder line of a cable line and the main control switch unit, and the main grounding switch unit is used for realizing the connection or disconnection between the grounding fault test system and the ground;
connecting a main control switch unit with a feeder line of an overhead line or a feeder line of a cable line and the fault control switch unit respectively, and realizing the conduction or disconnection between the feeder line of the overhead line or the feeder line of the cable line and the fault control switch unit by using the main control switch unit;
each fault control switch unit is arranged in parallel and is connected with one end of one resistance unit, and the other end of each resistance unit is arranged in a ground fault simulation area corresponding to the resistance unit; the fault control switch unit is used for realizing the connection or disconnection between the main control switch unit and the resistance unit;
wherein, master switch unit includes: the system comprises a main circuit breaker upper isolation disconnecting link, a main circuit breaker and a main circuit breaker lower isolation disconnecting link which are connected in sequence; the isolation disconnecting link on the main circuit breaker is respectively connected with a feeder line of an overhead line or a feeder line of a cable line; connecting the lower isolation disconnecting link of the main circuit breaker with each fault control switch unit through a parallel lead;
wherein, every fault control switch unit includes: the upper isolation disconnecting link of the fault simulation area circuit breaker, the fault simulation area circuit breaker and the lower isolation disconnecting link of the fault simulation area circuit breaker are sequentially connected; the upper isolation disconnecting link of the circuit breaker in the fault simulation area is connected with the main control switch unit through a parallel lead, and the lower isolation disconnecting link of the circuit breaker in the fault simulation area is connected with the resistance unit;
the resistors in the plurality of resistor units are connected through detachable connecting leads; the resistance value of the movable resistance box is adjustable from 0 ohm to 5000 ohm in a step mode; the ground fault simulation zone includes: the system comprises a sandstone ground fault simulation area, a cement ground fault simulation area, a soil ground fault simulation area, a pond ground fault simulation area, a grassland ground fault simulation area and an asphalt ground fault simulation area.
6. The method of claim 5, wherein the multiple configurations of the power distribution network comprise: a distribution network of a pure cable network, a distribution network of a pure overhead network or a distribution network of an overhead cable hybrid network.
7. The method of claim 5, wherein the switching device switches the distribution network to the distribution network meeting the test request according to the first configuration data, and comprises:
the overhead network power supply unit is used for supplying power to a feeder line of the overhead line;
a cable network power supply unit is used for supplying power to a feeder line of a cable line;
controlling at least one switch in the interconnection switch units by using a control unit based on the first configuration data so as to switch the power distribution network to the power distribution network meeting the test request according to the overhead network power supply unit and the cable network power supply unit;
and switching the power distribution network structure into the power distribution network structure meeting the test request according to the overhead network power supply unit and the cable network power supply unit by using the interconnection switch unit.
8. The method of claim 7, further comprising:
the overhead network power supply unit is internally provided with an overhead network power supply source, a first incoming switch, an overhead line bus and at least one overhead feeder line, wherein the first incoming switch, the overhead line bus and the at least one overhead feeder line are positioned in an overhead line power switch station;
the cable network power supply unit is internally provided with a cable network power supply source, a second incoming switch, a cable bus and at least one cable feeder which are positioned in the cable power switch station, and the head end of each cable feeder is provided with a second outgoing switch.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592536A (en) * | 2013-10-30 | 2014-02-19 | 李景禄 | Laboratory simulation test method of control parameters of dynamical earthing method for power distribution network neutral point |
| JP2017017922A (en) * | 2015-07-03 | 2017-01-19 | 東芝プラントシステム株式会社 | Dc power supply system, and dc ground fault point examination method |
| CN207541193U (en) * | 2017-10-13 | 2018-06-26 | 中国电力科学研究院 | A kind of polymorphic complex fault analogue test platform of power distribution network |
| CN109738761A (en) * | 2019-02-25 | 2019-05-10 | 国网湖南省电力有限公司电力科学研究院 | A kind of power distribution network simulation test ground fault lattice array switching device |
| CN110045218A (en) * | 2019-04-04 | 2019-07-23 | 国网浙江省电力有限公司嘉兴供电公司 | A kind of 10kV route Intelligent single-phase ground fault detection device and its control system |
| CN111239643A (en) * | 2019-08-21 | 2020-06-05 | 贵州电网有限责任公司 | Single-phase grounding test device and method for power distribution network |
| CN211014510U (en) * | 2019-08-21 | 2020-07-14 | 贵州电网有限责任公司 | Single-phase grounding test device for power distribution network |
-
2020
- 2020-12-31 CN CN202011610673.0A patent/CN112285492B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592536A (en) * | 2013-10-30 | 2014-02-19 | 李景禄 | Laboratory simulation test method of control parameters of dynamical earthing method for power distribution network neutral point |
| JP2017017922A (en) * | 2015-07-03 | 2017-01-19 | 東芝プラントシステム株式会社 | Dc power supply system, and dc ground fault point examination method |
| CN207541193U (en) * | 2017-10-13 | 2018-06-26 | 中国电力科学研究院 | A kind of polymorphic complex fault analogue test platform of power distribution network |
| CN109738761A (en) * | 2019-02-25 | 2019-05-10 | 国网湖南省电力有限公司电力科学研究院 | A kind of power distribution network simulation test ground fault lattice array switching device |
| CN110045218A (en) * | 2019-04-04 | 2019-07-23 | 国网浙江省电力有限公司嘉兴供电公司 | A kind of 10kV route Intelligent single-phase ground fault detection device and its control system |
| CN111239643A (en) * | 2019-08-21 | 2020-06-05 | 贵州电网有限责任公司 | Single-phase grounding test device and method for power distribution network |
| CN211014510U (en) * | 2019-08-21 | 2020-07-14 | 贵州电网有限责任公司 | Single-phase grounding test device for power distribution network |
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Inventor after: Shao Minfeng Inventor after: Qiu Jin Inventor after: Jiang Shengbao Inventor after: Chen Shang Inventor after: Feng Yu Inventor after: Wu Shipu Inventor after: He Yan Inventor after: Yao Tao Inventor after: Chen Zhiwei Inventor after: Cheng Lei Inventor after: Du Yan Inventor after: Chen Jiangbo Inventor after: Li Hui Inventor after: Yin Jing Inventor after: Guo Huihao Inventor after: Cai Shengwei Inventor after: Chen Cheng Inventor after: Mao Anlan Inventor before: Shao Minfeng Inventor before: Qiu Jin Inventor before: Jiang Shengbao Inventor before: Chen Shang Inventor before: Feng Yu Inventor before: Wu Shipu Inventor before: He Yan Inventor before: Yao Tao Inventor before: Chen Zhiwei Inventor before: Cheng Lei Inventor before: Du Yan Inventor before: Chen Jiangbo Inventor before: Li Hui Inventor before: Yin Jing Inventor before: Guo Huihao Inventor before: Cai Shengwei Inventor before: Chen Cheng Inventor before: Mao Anlan |