CN113162227B - Distribution automation system - Google Patents
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- CN113162227B CN113162227B CN202110307179.5A CN202110307179A CN113162227B CN 113162227 B CN113162227 B CN 113162227B CN 202110307179 A CN202110307179 A CN 202110307179A CN 113162227 B CN113162227 B CN 113162227B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a power distribution automation system, which comprises a data processing module, a power distribution control module and a power distribution control module, wherein the data processing module is used for collecting power grid operation data; the network exchange module is connected with the data processing module and is used for receiving and converting the operation data; the power grid connection module is connected with the data processing module and is used for converting power grid voltage; the monitoring module is respectively connected with the data processing module and the network switching module and the power grid connection module and is used for monitoring the electric energy quality and the electric energy reliability of the whole system in real time; and the alarm module is connected with the monitoring module and is used for early warning of equipment load out-of-limit and breaker accidents. The invention can remind the staff when the equipment is in abnormal operation, effectively monitor the whole system through the monitoring system, and simultaneously perform data transmission through the network switching system, thereby ensuring the normal operation of the whole system.
Description
Technical Field
The invention relates to the technical field of power, in particular to a power distribution automation system.
Background
The distribution network is positioned at the tail end of the power system and is directly connected with users, and the distribution network has the distinct characteristics of wide regional distribution, large power grid scale, multiple equipment types, multiple network connection, variable operation modes and the like, and the current distribution network planning, construction and operation and maintenance work has higher requirements on the level of stability, and the partial load reliability even reaches the level of more than 99.9999 percent, so that the stability level of the distribution network is improved through targeted construction, operation and maintenance, equipment investment and optimized operation modes.
The degree of automation of the power distribution network is closely related to the quality and stability of power supply and power consumption, and the power distribution network automation is an important means for improving the power supply quality, improving the power supply reliability, expanding the power supply capacity and realizing the high-speed economic operation of the power distribution network, and is one of important foundations for realizing the intelligent power grid.
At present, the technical performance, the automation level and the actual demand of the power distribution network automation equipment have larger gaps, the probability of the equipment failure is very high, and thus, the situations of power grid failure or misoperation and the like are caused, and the stability and the reliability of power supply are greatly reduced; the grid structure of the existing distribution automation system is unreasonable in design, unbalanced structural design is mainly represented in aspects of power grid contact mode, trunk node arrangement, mismatching of a main station and a control end and the like, so that contradiction and conflict are generated among all operation devices, and the automation application effect of the distribution network is greatly reduced.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above-described problems occurring in the prior art.
Therefore, the invention provides a power distribution automation system which can solve the problem of poor power supply stability and reliability of a power grid.
In order to solve the technical problems, the invention provides the following technical scheme: the system comprises a data processing module, a data processing module and a data processing module, wherein the data processing module is used for acquiring power grid operation data; the network exchange module is connected with the data processing module and is used for receiving and converting the operation data; the power grid connection module is connected with the data processing module and is used for converting power grid voltage; the monitoring module is respectively connected with the data processing module and the network switching module and the power grid connection module and is used for monitoring the electric energy quality and the electric energy reliability of the whole system in real time; and the alarm module is connected with the monitoring module and is used for early warning of equipment load out-of-limit and breaker accidents.
As a preferred embodiment of the power distribution automation system according to the present invention, the power distribution automation system comprises: the data processing module comprises remote signaling and remote measurement; the remote signaling is used for measuring a position signal of a switch, an internal fault comprehensive signal of a transformer, an action signal of a protection device, an operation condition signal of communication equipment and a tap position signal of a voltage regulating transformer; the telemetry is used for collecting active power and reactive power of the transformer, active power of a line, bus voltage and line current, temperature, pressure, flow, frequency and analog signals.
As a preferred embodiment of the power distribution automation system according to the present invention, the power distribution automation system comprises: the network switching module adopts a switch.
As a preferred embodiment of the power distribution automation system according to the present invention, the power distribution automation system comprises: the power grid connection module comprises a main transformer and a sub-transformer; the main transformer is connected with a transformer substation, and the main transformer is connected with a plurality of sub-transformers, and the sub-transformers comprise a plurality of distribution switches.
As a preferred embodiment of the power distribution automation system according to the present invention, the power distribution automation system comprises: the monitoring module comprises a state monitoring unit, a voltage monitoring unit, a current monitoring unit, a network speed monitoring unit and a network state monitoring unit.
As a preferred embodiment of the power distribution automation system according to the present invention, the power distribution automation system comprises: the monitoring module further comprises a state monitoring unit, a control unit and a control unit, wherein the state monitoring unit is used for monitoring the running state of monitoring equipment and comprises an industrial camera and a temperature sensor; the voltage monitoring unit is used for monitoring the voltage of each device in the power grid connection system; the current monitoring unit is used for monitoring the current of each device in the power grid connection system; the network speed monitoring unit is used for monitoring the network speed of the whole system; the network state monitoring is used for monitoring the network on-off of the whole system.
As a preferred embodiment of the power distribution automation system according to the present invention, the power distribution automation system comprises: the alarm module comprises an information reminding unit and a sound alarm unit, wherein the information reminding unit comprises an equipment operation fault reminding unit, a voltage reminding unit, a current reminding unit and a network reminding unit; the sound alarm unit comprises an equipment operation fault alarm unit, a voltage alarm unit, a current alarm unit and a network alarm unit.
As a preferred embodiment of the power distribution automation system according to the present invention, the power distribution automation system comprises: the operation fault reminding unit is used for judging the operation state of the power grid connection module.
As a preferred embodiment of the power distribution automation system according to the present invention, the power distribution automation system comprises: the state monitoring unit further comprises a temperature sensor for monitoring the working temperature of the equipment, and the operation fault reminding unit can be used for reminding the equipment when the temperature of the equipment is too high.
The invention has the beneficial effects that: through the information reminding module and the sound alarm module, the equipment can be reminded when the equipment is abnormally operated, so that the equipment is convenient to overhaul by the staff, the reaction speed of the staff can be improved when the equipment stops working, and the rush repair of the equipment is accelerated; the monitoring system can effectively monitor the whole system, and meanwhile, the network switching system can carry out data transmission, so that the normal operation of the whole system can be ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic block diagram of a power distribution automation system according to a first embodiment of the present invention;
fig. 2 is a schematic overall structure of a power distribution automation system according to a first embodiment of the present invention;
fig. 3 is a flow chart of a flow optimization control method of network switching according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram showing a dynamic characteristic of a buffer queue length with respect to anti-interference performance according to a flow optimization control method for network switching according to a second embodiment of the present invention;
FIG. 5 is a schematic diagram showing a dynamic characteristic of an ABR with respect to anti-interference performance according to a flow optimization control method for network switching according to a second embodiment of the present invention;
FIG. 6 is a schematic diagram showing a dynamic characteristic of a buffer queue length with respect to robustness according to a flow optimization control method for network switching according to a second embodiment of the present invention;
fig. 7 is a schematic diagram of dynamic characteristics of an ABR with respect to robustness according to a flow optimization control method for network switching according to a second embodiment of the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be 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.
While the embodiments of the present invention have been illustrated and described in detail in the drawings, the cross-sectional view of the device structure is not to scale in the general sense for ease of illustration, and the drawings are merely exemplary and should not be construed as limiting the scope of the invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Also in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1 to 2, a first embodiment of the present invention provides a power distribution automation system, and as can be seen from fig. 1, the power distribution automation system includes a data processing module 100, a network switching module 200, a power grid connection module 300, a monitoring module 400 and an alarm module 500; the data processing module 100 is used for collecting power grid operation data; the network switching module 200 is used for receiving and converting operation data; the power grid connection module 300 is used for converting power grid voltage; the monitoring module 400 is used for monitoring the power quality and the power reliability of the whole system in real time; the alarm module 500 is used for controlling signal processing and instruction transmission of each functional unit.
Specifically, the data processing module 100 in the present invention may be applied to a data collector with a model number of 34972A LXI or an i6200S series data collector, where the data processing module 100 includes remote signaling and telemetry; the remote signaling requirement adopts a passive contact mode, namely, the input of a certain path of remote signaling quantity is the contact of a pair of relays, or is closed or opened, and the remote signaling function is generally used for measuring the position signal of a switch, the comprehensive fault signal in a transformer, the action signal of a protection device, the running condition signal of communication equipment, the tap position signal of a voltage regulating transformer, the running state signal of an automatic regulating device and other signals which can provide the output of the relay mode, the total accident signal and the power failure signal of a main power supply of the device; telemetry is often divided into important telemetry, secondary telemetry, general telemetry, total addition telemetry and the like, and telemetry functions are often used for collecting active and reactive power of a transformer, active power of a line, bus voltage and line current, temperature, pressure, flow (flow rate) and the like, and cycle frequency and other analog signal collection.
The network switching module 200 is a functional unit for specifically performing data receiving and transmitting, and is connected to the data processing module 100, and in this embodiment, a switch is used to receive and convert the running data of the power grid; in particular, the data exchange in the network can be classified into circuit switching, packet switching, ATM switching; the circuit is reserved, a certain space is allocated, special network resources are provided, guaranteed service is provided, and the circuit is applied to a telephone network; the packet switching has no reservation, no space is allocated, network resource contention exists, and the guaranteed service is provided; packet switching may be used for datagram networks and virtual circuit networks, ATM switching being used for virtual circuit networks in units of symbols.
The power grid connection module 300 is connected with the data processing module 100 and comprises a main transformer 301 and a sub-transformer 302; the main transformer 301 is connected with a transformer substation, and the main transformer 301 is connected with a plurality of sub-transformers 302, the sub-transformers 302 including a plurality of distribution switches 302a; specifically, the transformer is a static electrical device for converting ac voltage and current to transmit ac power, and it realizes power transmission according to electromagnetic induction principle; the main transformer 301 in this embodiment may be a transformer with the model number TDQB-5KVA/50KV, the sub-transformer 302 may be an electric transformer, the output voltage of the electric transformer is 380V, and the distribution switch 302a may be a load driver with the model number TL082 CN.
The monitoring module 400 is respectively connected with the data processing module 100, the network switching module 200 and the power grid connection module 300, and can monitor the electric energy quality problems such as voltage deviation, frequency deviation, unbalance degree, power factor, harmonic content, voltage flicker and the like in real time and evaluate whether the electric energy quality meets the standard; the monitoring module 400 includes a status monitoring unit 401, a voltage monitoring unit 402, a current monitoring unit 403, a network speed monitoring unit 404, and a network status monitoring unit 405; the state monitoring unit 401 is used for monitoring the running state of the equipment, and comprises an industrial camera 401a and a temperature sensor 401b, the system monitors the running indicator lamp of the power grid connection module 300 through the industrial camera 401a, can directly judge the running and interruption state of the power grid connection module 300, monitors the working temperature of the power grid connection module 300 through the temperature sensor 401b, and can directly remind through the running fault reminding unit 501a when the temperature of the power grid connection module 300 is too high, so that the normal running of the equipment can be effectively ensured, and the reaction speed of the equipment in fault can be improved; the voltage monitoring unit 402 is used for monitoring the voltage of each device in the power grid connection system, for example, a voltage transformer can be used; the current monitoring unit 403 is used for monitoring the current of each device in the power grid connection system, for example, a current transformer can be used; the network speed monitoring unit 404 is used for monitoring the network speed of the whole system, for example, a network speed tester can be adopted; the network state monitoring 405 is used for monitoring the on-off state of the whole system network, and the embodiment realizes real-time monitoring of the system network through a NetWorker network monitoring tool.
The alarm module 500 is connected with the monitoring module 400 and comprises an information reminding unit 501 and a sound alarm unit 502; the information reminding unit 501 comprises an operation fault reminding unit 501a, a voltage reminding unit 501b, a current reminding unit 501c and a network reminding unit 501d; the audible alarm unit 502 includes an operation failure alarm unit 502a, a voltage alarm unit 502b, a current alarm unit 502c, and a network alarm unit 502d; when the system works, the operation fault reminding unit 501a judges the operation state of the power grid connection module 300 firstly, and the judgment can detect the state of a display lamp which works on the power grid connection module 300 through a camera; if the state is abnormal, the voltage reminding unit 501b, the current reminding unit 501c and the network reminding unit 501d are started, and reminding signals are respectively sent to the voltage alarm unit 502b, the current alarm unit 502c and the network alarm unit 502d; wherein, the operation fault reminding unit 501a and the operation fault alarming unit 502a work sequentially; the voltage reminding unit 501b and the voltage alarming unit 502b work sequentially; the current reminding unit 501c and the current alarming unit 502c work sequentially; the network reminding unit 501d and the network alarming unit 502d work sequentially; the information reminding unit 501 in this embodiment may use a display screen, and the sound alarm unit 502 may use an audible and visual alarm to alarm.
Example 2
Referring to fig. 3 to 7, a second embodiment of the present invention, which is different from the first embodiment, provides a flow optimization control method for network switching, including:
s1: and constructing a Smith estimation model, and estimating the dynamic characteristics of the network system under the basic disturbance in advance.
The constructed Smith estimation model is as follows:
wherein Y is the model output, X is the model input, and N isThe number of connections, s is the pole, t i The round trip delay for the ith connection.
S2: and continuously correcting the Smith estimation model by identifying the time-varying parameters of the object on line.
It should be noted that, during the actual operation of the network, the system parameters are dynamically changed, so the system parameters are time-varying, and the changes of the system parameters must be considered when designing the prediction model.
In this embodiment, the online identification system parameters are identified by adopting a recursive least square identification algorithm with forgetting factors to correct the estimated model, and the algorithm is specifically as follows:
lambda is generally 0.9-1, and when lambda is 1, the standard least square algorithm is adopted.
S3: and performing pre-estimation compensation on the controlled object through the pre-estimation model, and controlling the controlled object by utilizing a generalized predictive control strategy.
Parallel connection of Smith estimation model to pre-estimated dynamic characteristic G p (s)e -αs To achieve pure hysteresis characteristic compensation.
Further, the control steps are as follows:
(1) Online estimation
And->
A(z -1 )＝1-z -1
B(z -1 )＝l 1 +l 2 z -1 +…+l D z -D+1
(2) By using
Instead of A (z) -1 )、B(z -1 ) And recursively calculating the generalized predictive controller coefficients;
(3) Correcting the Smith estimated model parameters by applying an identification algorithm, and outputting a predicted value by a computing system;
(4) Calculating the control quantity of the generalized predictive controller at the moment n;
(5) Let n=n+1, return to step (1).
In order to verify and explain the technical effects adopted in the method, the embodiment carries out anti-interference and robustness tests on the method respectively, and the test results are demonstrated by scientific means to verify the real effects of the method.
The distance between the switch swl and sw2 is set to 2000km (round trip transmission delay is 20 ms), the set value x=50cells of the switch buffer queue level, the sampling time is 1ms, and the simulation time is 1000ms.
(1) Anti-interference test
The 5 ABR services and an on-off VBR service share a bottleneck link, and the cell is started when the time is 0.
From fig. 4, it can be seen that the buffer queue length oscillates around a desired value (50 cells); since the queue length is controlled to oscillate near the desired value, the switch buffer is fully utilized; in fig. 5, the ACR oscillates around a steady state of 10Mbps, indicating that the method has a certain anti-interference performance.
(2) Robustness test
The 5 ABR service sources are enabled to start transmitting data from time 0 and sequentially at intervals of 200 ms.
The simulation results are shown in fig. 6 and 7, and the method can respond to the change of the ABR link number rapidly as can be seen from the diagrams; as can be seen from fig. 6, the switch SW2 buffer queue length is piecewise stable and always converges to the target queue length for a limited time; as can be seen from fig. 7, the ACR of the source SI decreases as the number of active ABR links increases, and the robustness of the method can be seen.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, 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 the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (3)
1. A power distribution automation system, characterized by: comprising the steps of (a) a step of,
the data processing module (100) is used for collecting power grid operation data;
a network switching module (200) connected to the data processing module (100) for receiving and converting the operation data;
a grid connection module (300) connected to the data processing module (100) for converting a grid voltage;
the monitoring module (400) is respectively connected with the data processing module (100) and the power grid connection module (300) of the network switching module (200) and is used for monitoring the electric energy quality and the electric energy reliability of the whole system in real time;
the alarm module (500) is connected with the monitoring module (400) and is used for early warning of equipment load out-of-limit and breaker accidents;
the data processing module (100) includes telemetry and telemetry;
the remote signaling is used for measuring a position signal of a switch, an internal fault comprehensive signal of a transformer, an action signal of a protection device, an operation condition signal of communication equipment and a tap position signal of a voltage regulating transformer;
the remote measurement is used for collecting active power, reactive power, bus voltage, line current, temperature, pressure, flow, cycle frequency and analog signals of the transformer;
the network switching module (200) adopts a switch;
the power grid connection module (300) comprises a main transformer (301) and a sub-transformer (302);
the main transformer (301) is connected with a transformer substation, and the main transformer (301) is connected with a plurality of sub-transformers (302), wherein the sub-transformers (302) comprise a plurality of distribution switches (302 a);
the power distribution automation system adopts the following implementation mode:
s1: constructing a Smith estimation model, and estimating the dynamic characteristics of the network system under basic disturbance in advance;
the constructed Smith estimation model is as follows:
wherein Y is model output, X is model input, N is connection number, s is pole, t i Round trip delay for the ith connection;
s2: continuously correcting the Smith estimation model by on-line identification of the time-varying parameters of the object;
it should be noted that, in the actual running process of the network, the system parameters are dynamically changed, so that the system parameters are time-varying, and the change of the system parameters must be considered when designing the estimation model;
performing on-line identification on system parameters by adopting a recursive least square identification algorithm with forgetting factors;
to correct the estimated model, the algorithm is specifically as follows:
lambda is 0.9-1, and when lambda is 1, the standard least square algorithm is adopted;
s3: performing pre-estimation compensation on the controlled object through a pre-estimation model, and controlling the controlled object by utilizing a generalized predictive control strategy;
parallel connection of Smith estimation model to pre-estimated dynamic characteristic G p (s)e -αs To achieve pure hysteresis characteristic compensation;
further, the control steps are as follows:
(1) Online estimation
And->
A(z -1 )＝1-z -1
B(z -1 )＝l 1 +l 2 z -1 +…+l D z -D+1
(2) By using
Instead of A (z) -1 )、B(z -1 ) And recursively calculating the generalized predictive controller coefficients;
(3) Correcting the Smith estimated model parameters by applying an identification algorithm, and outputting a predicted value by a computing system;
(4) Calculating the control quantity of the generalized predictive controller at the moment n;
(5) Let n=n+1, return to step (1);
the monitoring module (400) comprises a state monitoring unit (401), a voltage monitoring unit (402), a current monitoring unit (403), a network speed monitoring unit (404) and a network state monitoring unit (405);
the monitoring module (400) further comprises,
the state monitoring unit (401) is used for monitoring the running state of the monitoring equipment and comprises an industrial camera (401 a) and a temperature sensor (401 b);
the voltage monitoring unit (402) is used for monitoring the voltage of each device in the power grid connection system;
the current monitoring unit (403) is used for monitoring the current of each device in the power grid connection system;
the network speed monitoring unit (404) is used for monitoring the network speed of the whole system;
the network state monitoring unit (405) is used for monitoring the network on-off state of the whole system;
the alarm module (500) comprises an information reminding unit (501) and a sound alarm unit (502),
the information reminding unit (501) comprises an operation fault reminding unit (501 a), a voltage reminding unit (501 b), a current reminding unit (501 c) and a network reminding unit (501 d);
the audible alarm unit (502) includes an operational fault alarm unit (502 a), a voltage alarm unit (502 b), a current alarm unit (502 c), and a network alarm unit (502 d).
2. The power distribution automation system of claim 1, wherein: the operation fault reminding unit (501 a) is used for judging the operation state of the power grid connection module (300).
3. The power distribution automation system of claim 2, wherein: the status monitoring unit (401) further comprises,
the state monitoring unit (401) monitors the working temperature of the power grid connection module (300) by adopting a temperature sensor, and can directly remind through the operation fault reminding unit (501 a) when the equipment temperature is too high.
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