CN110380515B - Experimental network monitoring system for power distribution network - Google Patents
Experimental network monitoring system for power distribution network Download PDFInfo
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- CN110380515B CN110380515B CN201910720451.5A CN201910720451A CN110380515B CN 110380515 B CN110380515 B CN 110380515B CN 201910720451 A CN201910720451 A CN 201910720451A CN 110380515 B CN110380515 B CN 110380515B
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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- H02J13/0006—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
The invention discloses a power distribution network experimental network monitoring system which comprises a control unit, a remote module and a control unit, wherein the control unit comprises a local module, a remote module and an adjusting module, one end of the local module is connected with the adjusting module and sends a first signal, and the other end of the local module and the remote module send a second signal to a control unit; the control unit is connected with the control unit and used for receiving the second signal and identifying and processing the second signal to convert the second signal into a third signal; the communication unit can receive the third signal and feed back a fourth signal to the control unit according to the third signal; the invention simulates interphase short circuit fault and ground fault of the power distribution network low-current grounding system, can adopt a physical dynamic model to more intuitively and effectively research the fault characteristics of the low-current grounding system, can flexibly adjust the grounding mode, and can conveniently construct an ungrounded system through local switch operation or remote protocol remote control.
Description
Technical Field
The invention relates to the technical field of electric power detection equipment, in particular to a power distribution network experimental network monitoring system.
Background
In recent years, as the requirement of users on the power supply reliability of a power distribution network is higher and higher, fault indicators are widely applied to the power distribution network, and the research on low-current ground fault identification and line selection technology is pushed up by one step; when the small current grounding system has a single-phase grounding fault, the zero sequence current of the small current grounding system is mainly the grounding capacitance current of the system, the magnitude of the current is related to the scale of the system, and the numerical value of the current is possibly very small, so that the single-phase grounding fault characteristics of the small current grounding system are not obvious, and the fault characteristics are complex. Although there are many digital simulation tools at present, there is a certain difference with the real low-current grounding scene, and the use requirement cannot be met, and the use is unreliable, and is not convenient for popularization and use.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The invention is provided in view of the problems of the existing power distribution network experimental network monitoring system.
Therefore, the invention aims to provide a power distribution network experimental network monitoring system which mainly simulates interphase short-circuit faults and grounding faults of a power distribution network low-current grounding system, can reflect physical processes and phenomena of an original system more intuitively, adopts a physical dynamic model to research fault characteristics of the low-current grounding system more intuitively and effectively, and can flexibly adjust a grounding mode.
In order to solve the technical problems, the invention provides the following technical scheme: a power distribution network experimental network monitoring system comprises a control unit, a remote module and a regulating module, wherein the control unit comprises an on-site module, the remote module and the regulating module, one end of the on-site module is connected with the regulating module and sends a first signal, and the other end of the on-site module and the remote module send a second signal to a control unit; the control unit is connected with the control unit and used for receiving the second signal and identifying and processing the second signal to convert the second signal into a third signal; the communication unit can receive the third signal and feed back a fourth signal to the control unit according to the third signal; and the response unit is connected with the control unit, the communication unit and the adjusting module and receives the fifth signal converted by the fourth signal processing.
The invention has the beneficial effects that: the circuit is scientific and reasonable in design, mainly simulates interphase short circuit faults and grounding faults of the low-current grounding system of the power distribution network, can reflect physical processes and phenomena of an original system more visually, adopts physical moving models to research fault characteristics of the low-current grounding system more visually and effectively, can flexibly adjust grounding modes, and can conveniently and quickly construct an ungrounded system through local switch operation or remote protocol remote control.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic structural diagram of an overall principle of a power distribution network experimental network monitoring system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a controller module in a first embodiment of the power distribution network experimental network monitoring system according to the present invention;
fig. 3 is a schematic structural view of a third switching terminal block according to the first embodiment of the power distribution network experimental network monitoring system of the present invention;
fig. 4 is a schematic structural diagram of a control unit according to a first embodiment of the power distribution network monitoring system of the present invention;
fig. 5 is a schematic structural diagram of a driving circuit according to a second embodiment of the power distribution network experimental network monitoring system of the present invention;
fig. 6 is a schematic structural diagram of a first switching terminal block according to a second embodiment of the power distribution network experimental network monitoring system of the present invention;
fig. 7 is a schematic structural view of a second switching terminal block according to a second embodiment of the power distribution network experimental network monitoring system of the present invention;
fig. 8 is a schematic structural diagram of an electric control module according to a second embodiment of the power distribution network experimental network monitoring system of the present invention;
fig. 9 is a schematic structural diagram of an indicating module according to a second embodiment of the power distribution network experimental network monitoring system of the present invention;
fig. 10 is a schematic diagram of a serial port module connection structure according to a third embodiment of the power distribution network experimental network monitoring system of the present invention;
fig. 11 is a schematic structural diagram of an internet access module according to a third embodiment of the power distribution network experimental network monitoring system of the present invention;
fig. 12 is a schematic structural diagram of a power supply unit according to a fourth embodiment of the system for monitoring an experimental network of a power distribution network of the present invention;
fig. 13 is a network topology diagram of an experimental network monitoring system for a power distribution network according to a fifth embodiment of the present invention;
FIG. 14 is a schematic diagram of a controller module according to a fifth embodiment of the present invention;
fig. 15 is a schematic circuit diagram of a control chip according to a fifth embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and it will be appreciated by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the present invention and that the present invention is not limited by the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Referring to fig. 1, the schematic diagram of the overall principle structure of the power distribution network experimental network monitoring system in one embodiment of the present invention includes a signal acquisition module M-100, a computer M-200, a cloud platform M-300, a mobile client M-400, a controller module M-500, a protection module M-600, and an early warning module M-700; the signal acquisition module M-100 is arranged in the power distribution network experimental network and used for detecting fault information of power distribution equipment in the power distribution network experimental network and transmitting the fault information to the computer M-200; the computer M-200 is in network communication connection with the cloud platform M-300 through the communication module M-201, the computer M200 transmits the power grid related data to an M-203 mobile client M-400 in the cloud platform M-300, the M-203 mobile client M-400 is in connection communication with the M-203 cloud platform M-300 through signals, and the data in the cloud platform M-300 are acquired in real time; the computer M-200 is connected with the controller module M-500, and when the power grid fails, the controller module M-500 starts the protection module M-600 and the early warning module M-700 according to the instruction to protect and warn the power grid. The cloud platform M-300 comprises a server, an LDAP router and a cloud storage device, and the server is provided with an encryption module; and a backup memory is arranged in the cloud storage device and used for backing up data. The computer M-200 further comprises a processor M-202 and an A/D converter M-203; the processor M-202 is electrically connected with the protection module M-600 and the early warning module M-700 of the M-203 and is used for sending a remote operation instruction; the A/D converter M-203 is connected with the signal acquisition module M-100. The signal acquisition module M-100 further comprises a sensor M-101 and a mutual inductor M-102, wherein the sensor M-101 comprises a smoke sensor and a temperature sensor, the smoke sensor and the temperature sensor are both arranged at the ambient temperature of a laboratory, but the temperature sensor can be arranged at the simulation experiment equipment of the power distribution network system and is used for detecting the real-time temperature of the equipment; and the mutual inductor M-102 comprises a voltage mutual inductor and a current mutual inductor, and the voltage mutual inductor are accessed into a loop of a power distribution network system to carry out real-time monitoring on current and voltage of nodes needing to be monitored, so that the stability of the system is improved. The early warning module M-700 comprises an early warning lamp M-701 and a buzzer M-702, and the early warning lamp M-701 and the buzzer M-702 are respectively connected with the controller module M-500. The protection module M-600 comprises a circuit breaker M-601 and a relay protector M-602, wherein the circuit breaker M-601 and the relay protector M-602 are both connected to a loop of a distribution network system, and when the processor M-202 judges the type and positions a fault, a control instruction is sent to the controller module M-500 to control the circuit breaker M-601 and the relay protector M-602 to be switched on and off, so that the real-time protection of a fault circuit is realized; and are all connected to the controller module M-500. When a power grid fails, the processor M-202 judges the type of the fault according to comparison of historical data stored in the computer M-200, sends an instruction to the controller module M-500, starts the protection module M-600, triggers the breaker M-601 and the relay protector M-602 to work, meanwhile, an alarm of the early warning module M-700 reminds workers through an early warning lamp M-701 and a buzzer M-702, and the processor M-202 transmits related data of the power grid to the cloud platform M-300 through the communication module M-201 for a plurality of people to access. The mobile client M-400 comprises a computer, a tablet and a mobile phone.
Referring to fig. 2 to 4, for a first embodiment of the present invention, an overall structure schematic diagram of a power distribution network experimental monitoring system is provided, as shown in fig. 2, a control module M-500 in the power distribution network experimental network monitoring system further includes a control unit 100, which includes a local module 101, a remote module 102 and a regulation module 103, one end of the local module 101 is connected to the regulation module 103 and transmits a first signal, and the other end of the local module 101 and the remote module 102 transmit a second signal to the control unit 200; the control unit 200 is connected with the control unit 100, and is configured to receive the second signal, identify the second signal, and perform identification processing on the second signal to convert the second signal into a third signal; a communication unit 300 capable of receiving the third signal and feeding back a fourth signal to the control unit 200 according to the third signal; and a response unit 400 connected to the control unit 200, the communication unit 300 and the adjustment module 103, wherein the response unit 400 receives the fifth signal converted by the fourth signal processing.
Specifically, the main structure of the present invention comprises a control unit 100, a control unit 200, a communication unit 300 and a response unit 400, wherein the control unit 100, the control unit 200, the communication unit 300 and the response unit 400 are cooperated with each other to simulate interphase short circuit fault and ground fault of the low current grounding system of the power distribution network, such as single-phase ground fault, two-phase short circuit ground fault, three-phase short circuit ground fault and other fault types, and to flexibly adjust the grounding mode, wherein the control unit 100 can be used to select the ground fault control mode and the fault type, and comprises a local module 101, a remote module 102 and an adjusting module 103, the adjusting module 103 is connected to one end of the local module 101 and transmits a first signal, the other end of the local module 101 and the remote module 102 transmit a second signal to the control unit 200, and an ungrounded system can be conveniently constructed by remote control of the local module 101 and the remote module 102, the first signal is an effective instruction signal regulated and controlled by the adjusting module 103, and the second signal is a signal for starting the control unit 200, it should be noted that the adjusting module 103 includes an a-phase knob, a B-phase knob, a C-phase knob, an AB-phase knob, a BC-phase knob, and an AC-phase knob; the control unit 200 plays a role of processing, regulating and controlling the communication unit 300 and the response unit 400, is connected with the local module 101 and the remote module 102 of the control unit 100, and is used for receiving a second signal, performing identification processing according to the second signal and converting the second signal into a third signal, wherein the control unit 200 identifies the received second signal, identifies whether the signal is transmitted by the local module 101 or the remote module 102, performs corresponding processing according to the signal, and only one of the local module 101 and the remote module 102 transmits the second signal according to different selected fault control modes when in use, wherein the control unit 200 is an MCU; the communication unit 300 is configured to perform a communication function, and is capable of receiving a third signal and feeding back a fourth signal to the control unit 200 according to the third signal, where the third signal is an instruction signal for starting the communication unit 300, and the communication unit 300 and the control unit 200 transmit signals in a bidirectional transmission manner; the response unit 400, which is connected to the control unit 200, the communication unit 300 and the adjustment module 103, performs functions of transmitting, driving and displaying a ground fault state, and receives a fifth signal converted by a fourth signal processing, wherein the fourth signal is a feedback signal from the communication unit 300 to the control unit 200, and the fifth signal is a feedback signal of the fourth signal processed by the control unit 200.
Further, the manipulation unit 100 further includes a cut-off mode for cutting off all operations to disable any operation, and it should be noted that the local module 101, the remote module 102 and the cut-off mode are provided on a switch, and a remote/cut-off/local control mode is selected through the switch in use, when the remote/cut-off/local switch is set as the local module 101, the buttons of the phase a, the phase B, the phase C, the phase AB, the phase BC and the phase AC on the panel of the adjusting module 103 are effective, and the adjusting buttons of the fault resistances of the phase a, the phase B, the phase C, the phase AB, the phase BC and the phase AC are adjusted to have different resistance values, so that different fault scenes (such as single-phase grounding, two-phase short-circuit fault, two-phase short-circuit grounding fault, three-phase short-circuit fault and three-phase short-circuit grounding fault) can be realized; when the remote/cut-off/local switch is set as the remote module 102, the knobs of the phase a, the phase B, the phase C, the phase AB, the phase BC and the phase AC on the panel of the adjusting module 103 are not operated effectively, the related parameters are set to simulate different fault scenes through the external PC dynamic simulation platform TCP, and the current fault state is indicated through the indication module 404 of the response unit 400, wherein the TCP is a connection-oriented, reliable and byte-stream-based transport layer communication protocol; when the "remote/cut/local" switch is set to "cut", either previously "local" or "remote" control, all operations fail, breaking the faulty connection.
Further, the control unit 200 is connected to the local module 101 and the remote module 102 of the control unit 100 through a third transit terminal row N3 for transmitting a second signal to the control unit 200, where it should be noted that the third transit terminal row N3 includes a pin 1(GNDJD), a pin 2(GNDYF), a pin 3(+12V), a pin 4(+2.5V), a pin 5 (switch) and a pin 6(GND), the local module 101 and the remote module 102 respectively correspond to the pin 1(GNDJD) and the pin 2(GNDYF) of the third transit terminal row N3, and the pin 1(GNDJD), the pin 2(GNDYF) and the pin 5 (switch) are respectively connected to the pin 1(GNDJD), the pin 0(GNDYF) and the pin 4 (switch) of the control unit 200, that is, the second signals of the local module 101 and the remote module 102 respectively pass through the pin 1(GNDJD) of the third transit terminal row N3, the pin 2 (GNDJD) of the remote module 102 and the pin 1 (switch) of the third transit terminal row N1 (switch) Pins PB0(GNDYF) and PA4(switcher) transmit, while pin 3(+12V), pin 4(+2.5V) and pin 6(GND) are respectively connected to 12V voltage, 2.5V voltage and ground, which play a role in power supply and stabilization; meanwhile, the pin PA13(SWDIO) and the pin PA14(SWCLK) of the control unit 200 are connected to an external jlink interface circuit, which is used for program burning.
Referring to fig. 5 to 9, a second embodiment of the present invention is different from the first embodiment in that: the response unit 400 comprises a driving circuit 401, an electric control module 402, an on-off module 403 and an indication module 404, and the driving circuit 401, the electric control module 402, the on-off module 403 and the indication module 404 are matched with each other to drive corresponding short-circuit faults. Specifically, referring to fig. 2, the main structure of the system comprises a control unit 100, a control unit 200, a communication unit 300 and a response unit 400, wherein the control unit 100, the control unit 200, the communication unit 300 and the response unit 400 are matched with each other to truly simulate the interphase short-circuit fault and the ground fault of the power distribution network low-current grounding system, such as single-phase ground fault, two-phase short-circuit ground fault, three-phase short-circuit ground fault and other fault types, and to flexibly adjust the grounding mode, wherein the control unit 100 can be used to select the ground fault control mode and the fault type, and comprises a local module 101, a remote module 102 and an adjusting module 103, the adjusting module 103 is connected to one end of the local module 101 and transmits a first signal, the other end of the local module 101 and the remote module 102 transmit a second signal to the control unit 200, and a remote control through the local module 101 and the remote module 102 can conveniently construct an ungrounded system, the first signal is an effective instruction signal regulated and controlled by the adjusting module 103, and the second signal is a signal for starting the control unit 200, it should be noted that the adjusting module 103 includes an a-phase knob, a B-phase knob, a C-phase knob, an AB-phase knob, a BC-phase knob, and an AC-phase knob; the control unit 200 is connected with the local module 101 and the remote module 102 of the control unit 100, and is used for receiving a second signal, performing identification processing according to the second signal and converting the second signal into a third signal, wherein the control unit 200 identifies the received second signal, identifies the signal sent by the local module 101 or the remote module 102, performs corresponding processing according to the signal, and only one of the local module 101 and the remote module 102 sends the second signal according to different selected fault control modes when in use, wherein the control unit 200 is an MCU; the communication unit 300 is configured to perform a communication function, and is capable of receiving a third signal and feeding back a fourth signal to the control unit 200 according to the third signal, where the third signal is an instruction signal for starting the communication unit 300, and the communication unit 300 and the control unit 200 transmit signals in a bidirectional transmission manner; the response unit 400, which is connected to the control unit 200, the communication unit 300 and the adjustment module 103, performs functions of transmitting, driving and displaying a ground fault state, and receives a fifth signal converted by a fourth signal processing, wherein the fourth signal is a feedback signal from the communication unit 300 to the control unit 200, and the fifth signal is a feedback signal of the fourth signal processed by the control unit 200. Six response units 400 are provided, and each of the six response units 400 includes a driving circuit 401, an electric control module 402, an on-off module 403, and an indication module 404, where the driving circuit 401 is used to implement functions of driving a high level to boost voltage and reversely outputting a low level, is connected to the control unit 200, receives a fifth signal, and sends a sixth signal to the electric control module 402, where the fifth signal is a signal obtained by processing and feeding back a fourth signal through the control unit 200, and the sixth signal is a signal obtained by processing and feeding back a fifth signal through the driving circuit 401.
Further, the six driver circuits 401 each include a decoding chip 401a, a first driver chip 401b and a second driver chip 401c, the first driver chip 401b is used for driving high-level boost, the second driver chip 401c is used for driving high-level boost and reversely outputting low-level action, the decoding chip 401a establishes connection with the second driver chip 401c through the first driver chip 401b, and receives a fifth signal, and the fifth signal is converted into a sixth signal through the first driver chip 401b and the second driver chip 401c for transmission, wherein the control unit 200 includes a pin PC0(1a0), a pin PC1(1a1), a pin PC2(1a2), a pin PC3(6a0), a pin PC4(6a1), a pin PC5(6a2), a pin PC6(2a0), a 7(2a1), a pin PC8(2a2), a pin PC9(5a 639), a pin PC 68656 (5 a) and a 828653), a 8653 (828653), and a 865) pins PC8(2a2), and a 828653), Pin PE (3A), pin PE (4A) and pin PD (E), wherein pin PD (E) is connected to pin E (E) of six decoding chips 401A, respectively, and pins PC (1A), pin PC (6A), pin PC (2A), pin PC (5A), pin PE (3A), pin PE (4A) and pin PE (4A) 18 pins of control unit 200 are connected to pins a (XA) and three pins three of six decoding chips 401A, respectively, Pin a1(XA1) and pin A3(XA3) connections (with X being one of 1, 2, 3, 4, 5, and 6); it should be noted that the decoding chip 401a is a 3-8 decoder, and specifically, the models of the decoding chip 401a, the first driving chip 401b, and the second driving chip 401c are SN74HCT138PW, SN74LSO4DR, and ULN2003L, respectively.
Further, the electric control module 402 receives a sixth signal of the second driver chip 401C through the first adaptor terminal row N1, identifies the sixth signal according to the seventh signal converted by receiving the first signal processing, and sends a response signal according to the sixth signal and the seventh signal, where the seventh signal is a command signal processed by the adjusting module 103 and sent to the electric control module 402, where the first adaptor terminal row N1 is provided with two, and the "a phase", "B phase", "C phase", "AB phase", "BC phase", "AC phase" knobs of the adjusting module 103 are each provided with 0 Ω, 0.7 Ω, 2 Ω, 12 Ω, and 32 Ω gears, and the "a phase", "B phase", "C phase", "AB phase", "BC phase", "AC phase" knobs of the adjusting module 103 are each provided with 30 gears and the six pins OUI1(YKX1), the pins i2(YKX2), the pins OUI3 (kx 3), and the six pins OUI3(YKX3), 30 pins, namely the pin OUI4(YKX4) and the pin OUI5(YKX5) (wherein X is one of 1, 2, 3, 4, 5 and 6), are pairwise corresponding to form a group and are respectively connected with 30 pins of two first transfer terminal rows N1, 30 ports corresponding to 30 pins of a first transfer terminal row N1 are respectively connected with pin 1 of 30 electric control modules 402, and it should be noted that the electric control modules 402 are circuit breakers.
Further, the on-off module 403 can receive the response signal, send a fault status signal to the internet access module 301 of the communication unit 300 according to the response signal, and send an indication signal to the indication module 404; the number of the on-off modules 403 is 30 (corresponding to SX1, SX2, SX3, SX4 and SX5 in the drawing, where X is one of 1, 2, 3, 4, 5 and 6), pins 1 of the 30 on-off modules 403 are respectively connected with 30 ports of the corresponding first relay terminal row N1, the on-off modules 403 are connected with the electric control module 402 through a second relay terminal row N2, and the second relay terminal row N2; it should be noted that the on-off module 403 is an ac contactor, and functions as a switch, so as to truly simulate various types of interphase short-circuit fault and ground fault.
Taking YK6_1 as an example, Y1 is gated through a decoding chip 401a (SN74HCT138PW) of the driving circuit 401, the level is raised to 5V through a first driving chip 401b, then the level is raised to 12V through a second driving chip 401c and is inverted, YK6_1 is controlled to output low level, 3 and 4 of the electric control module 402 are attracted, that is, the conductor 6_1 of the second transfer terminal row N2 is connected with 220V _6 of the electric control module 402, so that the on-off module 403 is controlled to be closed (i.e., S61 is closed), and the indicator light of the corresponding indicator module 404 is turned on.
Referring to fig. 10 and 11, a third embodiment of the present invention, which is different from the above embodiments, is: the communication unit 300 includes a network interface module 301 and a serial port module 302, and realizes remote control, setting of various fault scenes and grounding scenes, program upgrading, fault state signals and the like through the network interface module 301, and the network interface module 301 is used for keeping synchronization of a master clock of an external GPS time synchronization device through IRIG-B time synchronization. Specifically, referring to fig. 1, the main structure of the system comprises a control unit 100, a control unit 200, a communication unit 300 and a response unit 400, wherein the control unit 100, the control unit 200, the communication unit 300 and the response unit 400 cooperate with each other to truly simulate the interphase short-circuit fault and the ground fault of the low-current grounding system of the power distribution network, such as single-phase ground fault, two-phase short-circuit ground fault, three-phase short-circuit ground fault and other fault types, and to flexibly adjust the grounding manner, wherein the control unit 100 can be used to select the ground fault control mode and the fault type, and comprises a local module 101, a remote module 102 and a regulating module 103, the regulating module 103 is connected to one end of the local module 101 and transmits a first signal, the other end of the local module 101 and the remote module 102 transmit a second signal to the control unit 200, and an ungrounded system can be conveniently constructed by remote control of the local module 101 and the remote module 102, the first signal is an effective instruction signal regulated and controlled by the adjusting module 103, and the second signal is a signal for starting the control unit 200, it should be noted that the adjusting module 103 includes an a-phase knob, a B-phase knob, a C-phase knob, an AB-phase knob, a BC-phase knob, and an AC-phase knob; the control unit 200 is connected with the local module 101 and the remote module 102 of the control unit 100, and is used for receiving a second signal, performing identification processing according to the second signal and converting the second signal into a third signal, wherein the control unit 200 identifies the received second signal, identifies the signal sent by the local module 101 or the remote module 102, performs corresponding processing according to the signal, and only one of the local module 101 and the remote module 102 sends the second signal according to different selected fault control modes when in use, wherein the control unit 200 is an MCU; the communication unit 300 is configured to perform a communication function, and is capable of receiving a third signal and feeding back a fourth signal to the control unit 200 according to the third signal, where the third signal is an instruction signal for starting the communication unit 300, and the communication unit 300 and the control unit 200 transmit signals in a bidirectional transmission manner; the response unit 400, which is connected to the control unit 200, the communication unit 300 and the adjustment module 103, performs functions of transmitting, driving and displaying a ground fault state, and receives a fifth signal converted by a fourth signal processing, wherein the fourth signal is a feedback signal from the communication unit 300 to the control unit 200, and the fifth signal is a feedback signal of the fourth signal processed by the control unit 200. The communication unit 300 includes a network port module 301 and a serial port module 302, one end of the serial port module 302 and one end of the network port module 301 are both connected to the control unit 200, the other end of the serial port module 302 and the other end of the network port module 301 are respectively connected to an external GPS time synchronization device and a PC through a fourth through terminal row N4, and it should be noted that the serial port module 302 is connected to a pin 11(2-485-), a pin 12(2-485+), a pin 13(1-485-) and a pin 14(1-485+) of a fourth through terminal row N4.
Further, the serial port module 302 includes a third driver chip 302a, a first transceiver chip 302b and a second transceiver chip 302c, the third driver chip 302a can receive a third signal of the control unit 200, and is connected to the first transceiver chip 302b and the second transceiver chip 302c, wherein the third driver chip 302a plays a role of driving isolation, and pins VIA (TXD2), VOC (RXD2), VIB (TXD1) and VOD (RXD2) of the third driver chip are connected to pins PA1(TXD2), PA2(RXD TXD2), PA9 (RXD 1) and PA10(RXD2) of the control unit 200, the third driver chip 302a is an ADUM1402 driver chip, and the first transceiver chip 302b and the second transceiver chip 302c are both MAX13488 chips (485 chips).
The network port module 301 comprises a network card chip 301a and a network transformer 301b, one end of the network card chip 301a is connected with the control unit 200, the other end is connected with an external PC through the network transformer 301b, it should be noted that the model of the network card chip 301a is DM9000A1, 15 pins SD 0-15 (DB 0-15) of the network card chip are respectively connected with 15 pins PD 14-15 (DB 0-1), PD 0-1 (DB 2-3), PE 7-15 (4-12) and PD 8-10 (DB 13-15) of the control unit 200, the pins CMD (A0), NET (NET), IOR (NET), IOW (NET), WECS (WECS) (WE), and PWRST (NETNETNETNET) of the network card chip 301a are respectively connected with pins 11(A0), PB 2 (INT), PD 638 (PD), WECS (RST 638), WEE 23 (WEC) (WE) and CSI (CSI) and the model of the control unit 200 is PD/100 pins PD, the model of the network transformer 301 b/100M/OE (PD) is a PD 638, and the model of the network transformer 686 transformer 301b (PD) is connected with the pins DB 100B/100B), the connection wires TIN-, TIN +, TO + and TO-are respectively connected with the pin 3(TIN-), the pin 4(TIN +), the pin 5(TO +) and the pin 6(TO-) of the fourth adapter terminal row N4, and preferably, an electrostatic protection module 301c is further arranged between the network transformer 301b and the fourth adapter terminal row N4, so that the functions of voltage stabilization and circuit protection are achieved.
Referring to fig. 12, a fourth embodiment of the present invention, which is different from the above embodiments: the main structure further includes a power supply unit 500 for supplying power to the manipulation unit 100, the control unit 200, the communication unit 300, and the response unit 400, so that the manipulation unit 100, the control unit 200, the communication unit 300, and the response unit 400 can operate. Specifically, referring to fig. 2, the main structure of the system comprises a control unit 100, a control unit 200, a communication unit 300 and a response unit 400, wherein the control unit 100, the control unit 200, the communication unit 300 and the response unit 400 are matched with each other to truly simulate the interphase short-circuit fault and the ground fault of the power distribution network low-current grounding system, such as single-phase ground fault, two-phase short-circuit ground fault, three-phase short-circuit ground fault and other fault types, and to flexibly adjust the grounding mode, wherein the control unit 100 can be used to select the ground fault control mode and the fault type, and comprises a local module 101, a remote module 102 and an adjusting module 103, the adjusting module 103 is connected to one end of the local module 101 and transmits a first signal, the other end of the local module 101 and the remote module 102 transmit a second signal to the control unit 200, and a remote control through the local module 101 and the remote module 102 can conveniently construct an ungrounded system, the first signal is an effective instruction signal regulated and controlled by the adjusting module 103, and the second signal is a signal for starting the control unit 200, it should be noted that the adjusting module 103 includes an a-phase knob, a B-phase knob, a C-phase knob, an AB-phase knob, a BC-phase knob, and an AC-phase knob; the control unit 200 is connected with the local module 101 and the remote module 102 of the control unit 100, and is used for receiving a second signal, performing identification processing according to the second signal and converting the second signal into a third signal, wherein the control unit 200 identifies the received second signal, identifies the signal sent by the local module 101 or the remote module 102, performs corresponding processing according to the signal, and only one of the local module 101 and the remote module 102 sends the second signal according to different selected fault control modes when in use, wherein the control unit 200 is an MCU; the communication unit 300 is configured to perform a communication function, and is capable of receiving a third signal and feeding back a fourth signal to the control unit 200 according to the third signal, where the third signal is an instruction signal for starting the communication unit 300, and the communication unit 300 and the control unit 200 transmit signals in a bidirectional transmission manner; the response unit 400, which is connected to the control unit 200, the communication unit 300 and the adjustment module 103, performs functions of transmitting, driving and displaying a ground fault state, and receives a fifth signal converted by a fourth signal processing, wherein the fourth signal is a feedback signal from the communication unit 300 to the control unit 200, and the fifth signal is a feedback signal of the fourth signal processed by the control unit 200. And a power supply unit 500 for supplying power to the manipulation unit 100, the control unit 200, the communication unit 300, and the response unit 400, the power supply voltage reduction circuit comprises a first conversion module 501, a second conversion module 502, a third conversion module 503 and a power supply isolation module 504, wherein the first conversion module 501, the second conversion module 502, the third conversion module 503 and the power supply isolation module 504 are all conversion circuits and have the functions of voltage reduction and power supply isolation, furthermore, the first conversion module 501 comprises K7805-1000 chips and elements (resistors, capacitors and the like), a circuit formed by the K7805-1000 chips and the elements can realize voltage reduction, the input 12V voltage can be converted into a 5V voltage to be output, and the output 5V voltage is respectively transmitted to the second conversion module 502 and the first driving chip 401b and the second driving chip 401c of the driving circuit 401 for use, it should be noted that the second conversion module 502, the first driving chip 401b and the second driving chip 401c are connected in parallel; the second conversion module 502 comprises an AMS1117-3.3 chip and elements (resistors, capacitors and the like), a circuit formed by the elements and the AMS1117-3.3 chip plays a role of stabilizing and reducing voltage, an input 5V voltage can be converted into a 3.3V voltage to be output, the output 3.3V voltage is respectively transmitted to a third conversion module 503, the control unit 200, the communication unit 300 and the response unit 400 for use, and the third conversion module 503, the control unit 200, the communication unit 300 and the response unit 400 are arranged in parallel with one another; the third conversion module 503 includes a U _ TL431 chip and an element (resistor, capacitor, etc.), the circuit formed by the element and the U _ TL431 chip plays a role of stable voltage reduction, the U _ TL431 is a controllable precise voltage-stabilizing source, and can convert an input 3.3V voltage into a 2.5V voltage for output, and the output 2.5V voltage is respectively transmitted to the control unit 200 and the network transformer 301b response unit 400 of the network interface module 301 for use; the third conversion module 503, the control unit 200, the communication unit 300 and the response unit 400 are connected in parallel, and the power isolation module 504 is a digital power supply and an analog power supply for isolating a digital ground from an analog ground.
Example 5
Referring to fig. 13 to 14, an overall network topology diagram and an overall principle structure diagram of the power distribution network experimental network monitoring system provided in this embodiment are respectively illustrated. It is understood that the monitoring system provided in this embodiment is used for monitoring the real-time state of the experimental network system of the power distribution network, and the monitoring system and the experimental network system of the power distribution network run independently and are linked with each other, a set of system for experimental simulation is arranged in a laboratory of the experimental network system of the power distribution network, and the monitoring system is connected into the experimental network system of the power distribution network through various sensors and mutual inductors, so as to monitor and alarm the environment and the temperature condition of equipment in the laboratory and the running voltage and current of each equipment, and perform circuit protection when illegal operation and line fault occur, thereby improving the stability and safety of the experiment of the power distribution network. Therefore, in this embodiment, a monitoring power distribution cabinet is provided for the monitoring system, the monitoring power distribution cabinet is internally provided with the controller module M-500, the monitoring power distribution cabinet is connected with the computer M-200 through a TCP communication protocol, and the computer M-200 is connected with the cloud platform M-300 through the communication module M-201 to realize cloud monitoring.
More specifically, in the present embodiment, the controller module M-500 is actually a controller disposed in the monitoring power distribution cabinet, the controller includes a single chip, in the existing monitoring system, the protection module M-600 and the early warning module M-700 are both independently connected to the single chip, and both independently receive an instruction sent by the single chip to perform an action, the single chip needs to perform multiple calculations for faults occurring at the same time in the independent operation manner, and send multiple instructions to be respectively transmitted to the protection module M-600 and the early warning module M-700 through different channels, on one hand, the time for processing the instruction of the single chip is increased, and the increase of the transmission channel and the transmission efficiency will affect the synchronization time of the protection module M-600 and the early warning module M-700, so that a time synchronizer module is added under the conventional single chip, the purpose that the relay and the indicator lamp can act synchronously is ensured through time synchronization. The mode not only increases the development cost of the single chip microcomputer chip, but also needs time synchronization test, and the process is relatively complicated and complex.
With reference to the schematic illustration in fig. 15, in order to solve the above problems, in this embodiment, a controller integrated unit is proposed, which includes an early warning module M-700 and a protection module M-600 that are disposed under the same module, where the early warning module M-700 includes a buzzer module and an indicator light module, and the protection module M-600 includes a protection switch module, which is connected to a monitoring point that needs protection in a power distribution network system through a PA1 terminal, although it is not difficult to understand in this embodiment, the protection switch module is not limited to a single switch illustrated in fig. 15, and should also include multiple switches that can be networked when being connected to the power distribution network system, and are used for protecting power failure under equipment elements at different locations in the network. Further, the protection switch module is connected with the single chip microcomputer chip through a pin 1, and performs closing and opening actions of a switch C through receiving an instruction, the indicator light module is connected to a lead of the pin 1 through a node A, the buzzer module is connected to a circuit of a light LED1 through a node B, wherein the LED1 is a red light, and the LED2 is a green light, through the above manner, when the network normally operates, the circuit breakers of each monitoring point are in a closed state, the line i1 is in a closed state, and the line i2 is in an open state, in this state, the green light of the LED2 works, the red light of the LED1 is turned off, and the corresponding buzzer module is opened. When a certain monitoring point in the simulated power distribution network breaks down, the single chip microcomputer chip sends an instruction to the protection switch module, the switch C is switched to a line i2 through a line i1, at the moment, the line i1 is disconnected, the line i2 is closed, the lamp LED1 is switched on, a red light is turned on, and the buzzer module is switched on to send out warning sound until the line returns to normal. In this embodiment, the warning and protection are in the same line, and the line switching is performed according to whether a fault occurs, so that not only can the synchronization of the fault occurrence, the protection and the warning be ensured, but also the time synchronization module is prevented from being added to the single chip microcomputer chip, and the cost and the time for development and testing are reduced. Meanwhile, in the embodiment, the chip only needs to calculate the instruction data of the protection switch module, and does not need to calculate the instruction data of the warning lamp and the buzzer, so that the operation cost of the single chip microcomputer chip and the operation power consumption of the single chip microcomputer chip are greatly reduced. Therefore, the method has great significance for simulating a monitoring system in a power distribution network.
It should be noted that, the common data communication modes of the single chip microcomputer include SPI, IIC, RS232, single bus, and the like. Each communication mode has a corresponding timing diagram, and the sensor can transmit data with the singlechip chip in a conventional serial port mode. In the embodiment, a 48-pin single chip microcomputer with the model of STM32F103 is adopted, and a display interface module is provided for connecting a display of a control cabinet. And the WIFI module adopts a wireless module with the model number of Esp8266-01, communicates with a computer through a TCP protocol, and realizes the access of the single chip microcomputer chip to the Internet. And then the data is transmitted to the cloud platform M-300 through the computer, so that the remote control singlechip can send instructions. Furthermore, the operation panel module is a control key and the like connected with the control chip on the control cabinet, and comprises keys S1/S2/S3/S4 and the like, and belongs to offline control. In the embodiment, the switching module is added at the front end of the operation panel to realize the switching of the off-line/on-line control, the switching module is connected to the single chip microcomputer through a pin, the output end PC14 of the switching module is connected to the operation panel module, and the switching-off of the operation panel, namely the off-line operation, is realized by switching off the PC 14. The other output end PC13 is connected with a protection load, a protection circuit module is arranged in a circuit, when the output end PC14 needs to be closed, if the keys S1/S2/S3/S4 have illegal combination, for example, the circuit load is overlarge, the output end PC14 is closed at the moment, the circuit protection module is conducted, overload current is introduced into the protection module, and damage to the operation panel module and danger to workers can be prevented. The potential danger of switching off the output PC14 directly to the off-line state because the operator has not previously checked the operator panel is avoided. Furthermore, this online control module can be realized based on the WIFI module, sends the instruction to the single chip microcomputer chip through remote computer, and the switching of control output PC14 off/on line is realized to the disconnection, improves the security performance that the control switch board used.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a distribution network experiment network monitoring system which characterized in that: the system comprises a signal acquisition module (M-100), a computer (M-200), a cloud platform (M-300), a mobile client (M-400), a controller module (M-500), a protection module (M-600) and an early warning module (M-700); wherein,
the signal acquisition module (M-100) is arranged in the power distribution network experimental network and used for detecting fault information of power distribution equipment in the power distribution network experimental network and transmitting the fault information to the computer (M-200);
the computer (M-200) establishes a network communication connection with the cloud platform (M-300) through a communication module (M-201), the computer (M200) transmits power grid related data into the cloud platform (M-300), the computer (M-200) further comprises a processor (M-202) and an A/D converter (M-203);
wherein the processor (M-202) is electrically connected with the protection module (M-600) and the early warning module (M-700) and is used for sending an operation instruction; the A/D converter (M-203) is connected with the signal acquisition module (M-100);
the mobile client (M-400) is in connection communication with the cloud platform (M-300) through signals and acquires data in the cloud platform (M-300) in real time, and the mobile client (M-400) comprises a computer, a tablet and a mobile phone;
the computer (M-200) is connected with the controller module (M-500), and when the power grid fails, the controller module (M-500) starts the protection module (M-600) and the early warning module (M-700) according to the instruction to protect and warn the power grid;
the protection module (M-600) comprises a circuit breaker (M-601) and a relay protector (M-602); and are both connected with the controller module (M-500);
the early warning module (M-700) comprises an early warning lamp (M-701) and a buzzer (M-702), and the early warning lamp (M-701) and the buzzer (M-702) are respectively connected with the controller module (M-500).
2. The system for monitoring the experimental network of the power distribution network according to claim 1, wherein: the cloud platform (M-300) comprises a server, an LDAP router and a cloud storage device, and an encryption module is arranged on the server; and a backup memory is arranged in the cloud storage equipment and used for backing up data.
3. The system for monitoring the experimental network of the power distribution network according to claim 2, wherein: the signal acquisition module (M-100) further comprises a sensor (M-101) and a mutual inductor (M-102), wherein the sensor (M-101) comprises a smoke sensor and a temperature sensor; and the transformers (M-102) comprise voltage transformers and current transformers.
4. The system for monitoring the experimental network of the power distribution network according to claim 3, wherein: when the power grid fails, the processor (M-202) compares and judges the type of the fault according to internal stored historical data of the computer (M-200), sends an instruction to the controller module (M-500), starts the protection module (M-600), triggers the circuit breaker (M-601) and the relay protector (M-602) to work, meanwhile, the early warning module (M-700) alarms remind workers through the early warning lamp (M-701) and the buzzer (M-702), and the processor (M-202) transmits power grid related data to the cloud platform (M-300) through the communication module (M-201) for being accessed by multiple persons.
5. The system for monitoring the experimental network of the power distribution network, according to claim 4, is characterized in that: the controller module (M-500) further comprises: the control unit (100) comprises an on-site module (101), a remote module (102) and a regulation module (103), one end of the on-site module (101) is connected with the regulation module (103) and sends a first signal, and the other end of the on-site module (101) and the remote module (102) send a second signal to the control unit (200); the control unit (200) is connected with the control unit (100) and is used for receiving the second signal and carrying out identification processing on the second signal to convert the second signal into a third signal; the communication unit (300) can receive the third signal and feed back a fourth signal to the control unit (200) according to the third signal; and the response unit (400) is connected with the control unit (200), the communication unit (300) and the adjusting module (103), and the response unit (400) receives the fifth signal converted by the fourth signal processing.
6. The system for monitoring the experimental network of the power distribution network according to claim 5, wherein: the response unit (400) comprises a driving circuit (401) and an electric control module (402), wherein the driving circuit (401) is connected with the control unit (200), receives the fifth signal and sends a sixth signal to the electric control module (402).
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| CN110380515A (en) | 2019-10-25 |
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