CN102879661B - A distribution network automation terminal detection method and system - Google Patents

Abstract

The invention discloses a kind of distribution automation terminal detection system and method, wherein detection system comprises: programmable power supply, for providing power supply supply, and according to the signal command that outside inputs, provide the test signal comprising test voltage and measuring current to tested terminal; Standard scale, for showing the test signal that programmable power supply generates; Pick-up unit, for sending signal command to programmable power supply or tested terminal, and according to the response result that tested terminal response signal command generates, generates testing result and stores.The present invention can realize function to distribution automation terminal, accuracy and communication protocol and carry out integration and detect, be widely used in the construction of distribution automation system, can specification distribution automation terminal performance, function, improve its product quality, effectively can reduce the potential safety hazard that distribution network systems faces, improve power distribution network safe and stable operation level, improve the reliability of distribution system, for advancing electrical power distribution automatization system construction and application establish a firm foundation.

Description

A distribution network automation terminal detection method and system

technical field

The invention relates to the field of detection of power terminals in distribution networks, in particular to a detection method and system for distribution network automation terminals.

Background technique

In recent years, with the continuous deepening of the transformation of urban and rural power grids, the power supply reliability and power supply indicators of the distribution network have been greatly improved. Many units have carried out pilot work on power distribution automation at different levels and scales, and accumulated a lot of experience. Great progress has been made, such as: the distribution automation system has gradually transitioned from the timing setting and cooperation of the recloser to the fault detection through the feeder automation terminal, fault isolation and non-fault area restoration of power supply; the cost performance of key equipment for domestic distribution automation Significantly improve and gradually replace imported equipment; according to specific conditions, rationally select communication methods such as wireless, optical fiber, carrier, and public network GPRS and CDMA; the functions of the power distribution management system are gradually practical and intelligent, and are organically integrated with other systems to build Integrated power supply enterprise information system.

However, what has been done so far is only to test part of the functions of the distribution transformer remote terminal (Transformer terminal unit, TTU), and there is no professional system or platform that can fully test the functions and performance of all distribution network automation terminals.

The existing detection system can only detect the measurement accuracy, communication protocol and some functions of TTU. The main detection items include electric energy measurement, remote signaling, trip alarm and data statistics. The main detection principle is: the error of electric energy measurement adopts the comparison method, and compares the error between the terminal measurement value and the measurement value of the standard meter; The signal module issues control commands, and the PC host reads the terminal output trip signal collected by the communication module for detection; the data statistics function detection uses the data records generated during the operation of the terminal to compare with the data obtained by the PC host to judge the data statistics. Whether the function meets the requirements; the communication protocol detection is to detect whether the communication protocol of the terminal is consistent with the requirements of the protocol through the communication module.

In the process of realizing the present invention, the inventor found that the above-mentioned existing distribution network automation terminal detection platform has at least the following deficiencies:

1. The existing distribution network automation terminal detection platform is only for the distribution transformer remote terminal TTU, which cannot fully cover all remote terminals in the distribution network automation system, which is not conducive to the overall development of the distribution network automation system construction;

2. The existing distribution network automation terminal detection platform only realizes the detection of some functions of the remote terminal TTU of the distribution transformer, and the detection items are not comprehensive;

3. When the existing distribution network automation terminal detection platform conducts event tests (such as voltage over-limit tests) on the remote terminal TTU of distribution transformers, it uses computer instructions to simulate instead of real voltage and current. Correctly simulate the operating conditions of the power grid, so the detection conclusion is unreasonable.

Therefore, it is imperative to establish a complete distribution network automation terminal detection platform to realize the full performance detection of distribution network automation terminals. The full performance inspection of the distribution network automation terminal can ensure the stable and reliable operation of the network terminal, reduce the commissioning and maintenance workload of the terminal in operation, and ensure the smooth construction and promotion of the distribution network automation system.

Contents of the invention

The purpose of the present invention is to overcome the deficiency of the integrated detection of distribution network automation terminal functions, accuracy and communication protocols in the prior art, and provide a distribution network automation terminal detection method and system to realize the detection of distribution network automation terminals The function, accuracy and communication protocol of the integrated detection, and correctly simulate the operating conditions of the power grid, so that the detection conclusion is more reasonable.

In order to achieve the above purpose, the embodiment of the present invention discloses a distribution network automation terminal detection system, including: a program-controlled power supply, used to provide power supply, and according to the signal command input from the outside, provide the tested terminal with test voltage and test current The test signal included; the standard table, used to calculate and display the test signal including the test voltage and test current generated by the program-controlled power supply; the detection device, used to send the program-controlled power supply or the terminal to be tested. The signal command, and according to the response result generated by the detected terminal in response to the signal command, generate a detection result and store it;

Wherein, the detection device includes: a function simulation module, which is used to send signal commands including voltage, current, frequency, and phase angle to the programmable power supply to simulate on-site operating conditions to perform inspections on the terminal under inspection. Function detection including abnormal emergencies, parameter setting, data collection, data statistics, and alarm events; the accuracy test module is used to send standard signal commands to the programmable power supply, and compare the standard data displayed by the standard table and the tested data generated by the tested terminal to detect the AC sampling accuracy and measurement accuracy of the tested terminal; the communication protocol detection module is used to send a command frame to the tested terminal and judge the Checking whether the response frame of the tested terminal meets the requirements of the frame format to detect the communication protocol of the tested terminal; the database is used to store the detection results.

Preferably, the present invention further includes a pulse module, configured to generate a pulse signal according to the command signal, so as to detect the pulse collection function of the detected terminal;

Preferably, the present invention further includes a DC signal control module, configured to generate a DC analog quantity to detect the DC analog quantity acquisition function of the terminal under inspection.

In order to achieve the above purpose, the embodiment of the present invention also discloses a distribution network automation terminal detection method, including: sending a signal command to an external program-controlled power supply; the program-controlled power supply generates a test voltage and a test current according to the signal command. the test signal; the tested terminal generates a response result according to the test signal; compares the response result with the test signal, generates a detection result and stores it.

The beneficial effects of the distribution network automation terminal detection system and method of the embodiment of the present invention are:

The distribution network automation terminal detection system and method of the embodiment of the present invention can realize the function test, accuracy test and communication protocol test of the distribution network automation terminal (DTU, TTU, FTU) and power load management terminal, and can test the above-mentioned equipment Auxiliary testing of the performance of the test; the test process is automatically controlled by the computer, the test efficiency is high and the accuracy of the test results is ensured; the actual power supply is used to simulate the abnormal power supply in the field working conditions, ensuring the effectiveness of the detection of the terminal alarm event function; the test plan, Test results can be saved and generated automatically, ensuring the reliability of test data. The distribution network automation terminal detection system and method of the embodiments of the present invention fill the gap in the current distribution network automation terminal detection, can be widely used in the construction of distribution network automation systems, can standardize the distribution network automation terminal performance, function, and improve its performance. Product quality can effectively reduce the hidden dangers faced by the distribution network system, improve the safe and stable operation level of the distribution network, improve the reliability of the distribution system, and lay a solid foundation for promoting the construction and application of the distribution automation system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural diagram of a distribution network automation detection system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the connection between the distribution network automation detection system and the terminal to be detected according to an embodiment of the present invention;

3 is a schematic structural diagram of a detection device in a distribution network automation detection system according to an embodiment of the present invention;

Fig. 4 is another schematic structural diagram of the detection device in the distribution network automation detection system according to the embodiment of the present invention;

5 is a schematic structural diagram of a program-controlled power supply in a distribution network automation detection system according to an embodiment of the present invention;

6 is a schematic structural diagram of another embodiment of the distribution network automation detection system of the present invention;

Fig. 7 is a method flowchart of an embodiment of the distribution network automatic detection method of the present invention;

FIG. 8 is a schematic structural diagram and a schematic diagram of a signal direction for detection by the distribution network automation detection system according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram and a schematic diagram of a signal direction for detecting abnormal emergencies in the embodiment shown in Fig. 8;

Fig. 10 is a schematic structural diagram and a schematic diagram of signal trends for accuracy detection in the embodiment shown in Fig. 8;

FIG. 11 is a schematic structural diagram and a schematic diagram of a signal direction for performing communication protocol detection in the embodiment shown in FIG. 8;

Fig. 12 is a schematic structural diagram and a schematic diagram of a signal direction for DC acquisition function detection in the embodiment shown in Fig. 8;

FIG. 13 is a schematic structural diagram and a schematic diagram of a signal trend for pulse collection function detection in the embodiment shown in FIG. 8 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The distribution network automation terminal detection system can realize the function detection, accuracy detection and communication protocol detection of the distribution network automation terminals (FTU, DTU and TTU), and perform auxiliary detection on the performance of the terminals. The detection process is reasonable, the detection items are comprehensive, and the detection accuracy and efficiency are high.

FIG. 1 is a schematic structural diagram of an automatic detection system for a distribution network according to an embodiment of the present invention. As shown in the figure, the distribution network automation detection system of this embodiment includes a programmable power supply 1, a standard meter 2 and a detection device 3, wherein the programmable power supply 1 is used to provide power supply, and according to the signal command input from the outside, to the tested terminal Provide test signals including test voltage and test current; Standard table 2 is used to calculate and display the test signals generated by the programmable power supply including test voltage and test current; The inspected terminal sends the signal command, and generates and stores a detection result according to a response result generated by the inspected terminal in response to the signal command.

In this embodiment, as shown in FIG. 2 , the programmable power supply 1 and the detection device 3 are respectively connected to the terminal 10 to be tested. The detection device 3 can directly send a signal command to the terminal 10 under inspection, and the terminal 10 under inspection generates a response result according to the signal command, and sends it to the detection device 3 for storage; or the detection device 3 sends a signal command to the program-controlled power supply 1, and the program-controlled power supply 1. Generate a test signal according to the signal command and send it to the tested terminal 10, and the tested terminal 10 generates a response result according to the test signal, and sends it to the detection device 3 for storage.

In this embodiment, as shown in FIG. 3 , the detection device 3 includes a function simulation module 301 , an accuracy test module 302 , a communication protocol detection module 303 and a database 304 . in,

The function simulation module 301 is used to send signal commands including voltage, current, frequency, and phase angle to the programmable power supply to simulate the on-site operating conditions to perform abnormal emergency events and parameters of the terminal under inspection. Function detection including setting, data collection, data statistics, and alarm events. That is: the function simulation module can detect the function of the detected terminal for abnormal event processing, and can also send normal signal commands to the program-controlled power supply to detect various functions such as parameter settings and data statistics of the detected terminal;

The accuracy testing module 302 is configured to send a standard signal command to the programmable power supply, and compare the standard data displayed on the standard table with the measured data generated by the terminal under test, so as to detect the AC sampling of the terminal under test Accuracy and accuracy of measurement;

A communication protocol detection module 303, configured to send a command frame to the terminal under test, and determine whether the response frame of the terminal under test meets the requirements of the verification frame format, so as to detect the communication protocol of the terminal under test;

The database 304 is used to store the detection results.

Fig. 4 is another schematic structural diagram of the detection device 3 in the distribution network automation detection system according to the embodiment of the present invention. In this structural embodiment, the detection device 3 includes a data transmission port 305 as an interface between the detection device 3 and the external terminal 10 to be tested, the standard meter 2 and the programmable power supply 1 . The data transmission port 305 may include RS232 communication, standard table protocol analysis, DC signal control module protocol analysis port and network communication, uplink protocol analysis port of the detected device, etc.

When the detection system communicates with the terminal under test, RS232 port, network port or USB port is used, depending on which interface is reserved for the terminal under test. At present, the terminals with network port and RS232 port are mainly used. During the process of detecting the terminal to be tested, the network port or RS232 port of the terminal to be tested must be connected with the detection system.

Figure 5 is a schematic structural diagram of the program-controlled power supply in the distribution network automation detection system of the embodiment of the present invention. As shown in the figure, the program-controlled power supply in this embodiment includes a voltage and current signal control module 101, a D/A conversion circuit 102 and an output module 103. Wherein, the voltage and current signal control module 101 is used to generate a digital voltage and current signal according to the signal command; the D/A conversion circuit 102 is used to generate an analog voltage and current signal from the digital voltage and current signal; the output module 103 , for outputting the analog voltage and current signal to the standard meter and the tested terminal.

Fig. 6 is a schematic structural diagram of another embodiment of the distribution network automation detection system of the present invention. In this embodiment, the distribution network automation detection system further includes a pulse module 4 and a DC signal control module 5, which are respectively connected to the tested terminal 10 and the detection device 3. Wherein, the pulse module 4 is used for generating a pulse signal according to the command signal, so as to detect the pulse collection function of the detected terminal. The DC signal control module 5 is used to generate a DC analog quantity to detect the DC analog quantity collection function of the tested terminal. In this embodiment, the pulse module 4 and the DC signal control module 5 may be modules controllable by the detection device 3 , or devices independent of the detection device 3 .

Fig. 7 is a method flow chart of an embodiment of the distribution network automation detection method of the present invention. As shown in the figure, the distribution network automation terminal detection method includes:

Step S101, sending a signal command to an external programmable power supply. In this embodiment, the signal command sent includes: sending a signal command including voltage, current, frequency, and phase angle to the programmable power supply to simulate the on-site operating conditions to detect the abnormality of the terminal under inspection. Function detection including emergencies, parameter setting, data collection, data statistics, and alarm events; or send standard signal commands to the programmable power supply, and compare the standard data displayed by the standard table with the The measured data is used to detect the AC sampling accuracy and metering accuracy of the detected terminal.

Step S102, the programmable power supply generates a test signal including a test voltage and a test current according to the signal command. If in step S101, what is sent is an abnormal signal command, if it is an abnormal voltage signal command, the programmable power supply will generate an abnormal voltage signal according to the abnormal voltage signal command, and send it to the terminal 10 under inspection.

In step S103, the tested terminal generates a response result according to the test signal. In this embodiment, according to the test signal sent by the program-controlled power supply, for example, according to the abnormal signal sent by the program-controlled power supply, the terminal should be able to monitor the abnormal information and report it to the detection device in the form of an alarm or event.

Step S104, comparing the response result with the test signal, generating and storing a detection result. Compare the response result of the tested terminal with the expected test result of the test signal, if they are consistent, the test is passed, and if they are inconsistent, the test is not passed.

In this embodiment, the distribution network automation terminal detection method also includes:

sending a command frame to the tested terminal to detect the communication protocol of the tested terminal; or

Generate a pulse signal and send it to the terminal under inspection, and compare the generated pulse signal with the pulse collection information of the terminal under inspection to detect the pulse collection function of the terminal under inspection; or

Generate a DC analog quantity and send it to the terminal under inspection, so as to detect the DC analog quantity acquisition function of the terminal under inspection.

Fig. 8 is a schematic structural diagram and a schematic diagram of a signal trend for detection by the distribution network automation detection system according to an embodiment of the present invention. The detection equipment is located in the main control computer, including a function simulation module, an accuracy test module, a communication protocol test module, a communication protocol analysis module and a database. in:

The function of the function simulation module is:

One, (1) sending abnormal signal order to described program-controlled power supply, receiving the event information uploaded by the checked terminal; (2) judging whether the response of the checked terminal is normal; (3) writing the abnormal emergency test result into the database;

Two, (1) sending a normal signal command to the program-controlled power supply; (2) judging whether the parameter setting and data statistics of the checked terminal are normal; (3) writing the normal function event test results into the database.

The functions of the accuracy test module are: (1) send output standard signal commands to the "current and voltage control module" of the program-controlled power supply; read the measured data from the tested terminal; read the standard data from the standard table; (2) the measured data Compare with the standard data to judge whether the error meets the requirements; (3) The measured data, standard data and error test results are written into the database.

The functions of the communication protocol detection module are: (1) send a command frame to the checked terminal, and then accept the response frame returned by the checked terminal; (2) judge whether the response frame of the checked terminal meets the requirements of verification and frame format, and analyze (3) Write the communication protocol test results into the database.

The main control computer (detection device) controls the program-controlled power supply to output different voltages, currents, frequencies and phases, and simulates the on-site operating conditions to provide them to the terminal under inspection. Programmable power supply includes voltage and current signal control module, D/A conversion circuit, DSP circuit and output display window, etc.

FIG. 9 is a schematic diagram of a structure and a schematic diagram of a signal trend for performing function detection on a terminal under inspection in the embodiment shown in FIG. 8 . As shown in the figure, the tested terminal is connected with the program-controlled power supply and the function simulation module. The detection device can simulate the main station, and realize the "three remote" function detection of the terminal under inspection. It can also simulate on-site working conditions such as voltage over limit, current over limit, unbalance, power over limit, harmonic over limit, etc. through the program-controlled power supply. Detect various functions of the terminal under inspection to ensure that the functions of the terminal under inspection comply with the functional specifications of relevant standards. Figure 9 is a schematic structural diagram of detecting abnormal emergencies. As shown in the figure, the function simulation module sends an output abnormal signal command to the program-controlled power supply, and the program-controlled power supply generates abnormal test signals according to the abnormal signal command, such as abnormal voltage signal, abnormal Current signals, etc., transmit the generated abnormal test signal to the terminal under inspection, and the terminal under inspection generates an abnormal response result according to the abnormal test signal, returns it to the detection device and writes the abnormal emergency event data into the database.

In other embodiments, using the function simulation module to detect the function of the terminal under inspection further includes: the function simulation module sends a normal signal command to the programmable power supply; judges the parameter setting, data statistics, alarm events, data collection, etc. of the terminal under inspection Whether the function is normal; normal function event test results are written to the database.

(1) Alarm event function: the main control computer controls the program-controlled power supply to simulate the on-site operating conditions, and generates abnormal voltage and current. The terminal should be able to monitor the abnormal information and report it to the main control computer in the form of an alarm or event.

For example: power off the tested terminal, then power on again, repeat 5 times, the number of power outages recorded by the detection device should be 5 times; set the terminal’s upper limit voltage to 242V, control the output voltage of the program-controlled power supply to 3×260V, The terminal should report the event of voltage exceeding the upper limit.

(2) Parameter setting function: The main control computer sends parameter information to the tested terminal. After the terminal confirms, the main control computer calls and measures the terminal parameter information, and automatically compares it with the issued information. If it is completely consistent, the terminal parameter setting function is determined. qualified.

For example: the master station issues "master station IP address and port: main IP and port: 218.249.168.122: 7107", the terminal replies with a confirmation message, the master station calls the "master station IP address and port" parameter, and the terminal should reply "218.249.168.122:7107", function qualified.

(3) Data acquisition function: the terminal under test is connected to an external electric energy meter through the RS485 port, and the main control computer controls the program-controlled power supply to output a certain voltage to the terminal and the electric energy meter. The power information is consistent, the program-controlled power supply provides a certain current to the electric energy meter, and after several hours of operation, the current is stopped. At this time, the meter reading information of the terminal is called again, and it should be consistent with the information of the electric energy meter. Hours, call for another test..., cycle test for 24 hours.

For example: the terminal is connected to an external electric energy meter through the RS485 port, and the computer controls the program-controlled power supply to provide 3×220V voltage to the terminal and 3×220V voltage to the electric energy meter. Valley 0.00kWh, at this time the energy meter display information is also the total 20.66kWh peak 0.33kWh peak 0.22kWh flat 20.11kWh valley 0.00kWh; provide 3×1A current to the energy meter, run for 5 hours, at this time the energy meter displays a total of 23.96kWh peak 0.33 kWh peak 0.22kWh flat 23.41kWh valley 0.00kWh...until run full 24 hours. In the process, if the meter reading information of the terminal under inspection is consistent with the information of the electric energy meter, it is judged to be qualified.

(4) Data statistics function: the main control computer controls the program-controlled power supply to maintain a stable voltage and current for a period of time, and detects the data statistics function of the terminal. Eligibility.

For example: the computer controls the program-controlled power supply to provide 3×220V voltage and 3×1.5A current to the terminal, run for 1 hour, change to two-phase power supply, run for one hour, reduce the current to 0, run for one hour, call and measure the active power recorded by the terminal The curve should be 990W for one hour, 660W for one hour, and the time is consistent with the power supply change time.

FIG. 10 is a schematic structural diagram and a schematic diagram of signal trends for accuracy detection in the embodiment shown in FIG. 8 . As shown in the figure, the tested terminal is connected to the program-controlled power supply, standard meter, and accuracy test module to test the AC sampling accuracy and measurement accuracy of the tested terminal. The detection system can carry out accuracy detection of electrical indicators such as voltage, current, power, frequency, etc., power quality indicators such as harmonics, unbalance, and voltage changes, terminal power consumption indicators, and power energy indicators of the terminal under inspection, ensuring that the terminal The accuracy meets the relevant standards.

In this embodiment, the accuracy test module sends an output standard signal command to the programmable power supply, and the programmable power supply can maintain a certain voltage and current according to the standard signal command, and the voltage and current information can be calculated and displayed in the standard table. The current information generates the inter-mining information of the terminal and sends it to the accuracy test module of the detection device, and calculates the terminal inter-mining information and the voltage and current data displayed on the standard meter to obtain the accuracy of the inter-mining circuit.

Detect AC sampling accuracy, including detecting voltage accuracy, current accuracy, power accuracy, etc. The following example is to detect voltage accuracy.

In this embodiment, if the error value in the table is between ±0.5, it is judged that the accuracy is qualified.

FIG. 11 is a schematic structural diagram and a schematic diagram of signal trends for communication protocol detection in the embodiment shown in FIG. 8 . As shown in the figure, the tested terminal is connected with the program-controlled power supply and the communication protocol testing module to test the communication protocol of the terminal. In this embodiment, the program-controlled power supply and the function simulation module are used for power control of the tested equipment and the testing device respectively. The detection system can test the consistency of the communication protocol of the terminal under inspection from several aspects such as the data link layer, application layer and communication process, and can also simulate various problems that may occur in the communication protocol, and correct them in the form of error frames. The terminal performs a negative test to finally ensure that the terminal meets the requirements of the communication protocol.

In this embodiment, the main control computer communicates with the checked terminal through the correct message and the wrong message through the communication protocol detection module, and detects the communication protocol of the terminal at the link layer and the application layer.

For example: the message is in binary form, the communication protocol detection module sends the correct message to the checked terminal, and the checked terminal should respond correctly when receiving the message. The communication protocol detection module sends an error message to the terminal, and the detected terminal should not respond, or reply FF.

FIG. 12 is a schematic structural diagram and a schematic diagram of a signal direction for DC acquisition function detection in the embodiment shown in FIG. 8 . As shown in the figure, the tested terminal is connected to the program-controlled power supply and the DC signal control module, and the DC analog acquisition function of the test terminal is tested. The functional simulation module in this embodiment is connected to a program-controlled power supply for power control of the entire detection device.

FIG. 13 is a schematic structural diagram and a schematic diagram of a signal trend for pulse collection function detection in the embodiment shown in FIG. 8 . The tested terminal is connected with the program-controlled power supply, the pulse module, and the accuracy test module to measure the pulse collection function of the terminal. In this embodiment, the program-controlled power supply and the function simulation module are used for power control of the tested equipment and the testing device respectively.

In this embodiment, the main control computer controls the pulse module to generate a certain number of electrical pulses with a certain frequency, and calls and measures the pulse collection information of the terminal, and calculates the accuracy of the pulse loop collection.

For example, if the pulse constant of the measurement point is set to 4800imp/kWh, the error range of pulse acquisition is ±2%. Control the pulse generator to send out a pulse frequency of 12/min. Under this frequency, the terminal should record a power of 0.15kW, which is qualified between 0.147kW and 0.153kW.

The distribution network automation terminal detection system and method of the embodiment of the present invention can realize the function test, accuracy test and communication protocol test of the distribution network automation terminal (DTU, TTU, FTU) and power load management terminal, and can test the above-mentioned equipment Auxiliary testing of the performance of the test; the test process is automatically controlled by the computer, the test efficiency is high and the accuracy of the test results is ensured; the actual power supply is used to simulate the abnormal power supply in the field working conditions, ensuring the effectiveness of the detection of the terminal alarm event function; the test plan, Test results can be saved and generated automatically, ensuring the reliability of test data. The distribution network automation terminal detection system and method of the embodiments of the present invention fill the gap in the current distribution network automation terminal detection, can be widely used in the construction of distribution network automation systems, can standardize the distribution network automation terminal performance, function, and improve its performance. Product quality can effectively reduce the hidden dangers faced by the distribution network system, improve the safe and stable operation level of the distribution network, improve the reliability of the distribution system, and lay a solid foundation for promoting the construction and application of the distribution automation system.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (4)

1. The utility model provides a distribution network automation terminal detecting system which characterized in that, distribution network automation terminal detecting system includes:

the program-controlled power supply is used for supplying power supply and providing test signals including test voltage and test current for the tested terminal according to signal commands input from the outside;

the standard table is used for calculating and displaying test signals including test voltage and test current generated by the programmable power supply;

the detection device is used for sending the signal command to the program-controlled power supply or the detected terminal, and generating and storing a detection result according to a response result generated by the detected terminal responding to the signal command; wherein the detection device comprises:

the function simulation module is used for sending signal commands including voltage, current, frequency and phase angle to the programmable power supply to simulate the field operation working condition so as to perform function detection including abnormal emergency, parameter setting, data acquisition, data statistics and alarm events on the detected terminal;

the accuracy testing module is used for sending a standard signal command to the program-controlled power supply and comparing standard data displayed by the standard table with tested data generated by the tested terminal so as to detect the alternating current sampling accuracy and the metering accuracy of the tested terminal;

the communication protocol detection module is used for sending a command frame to the detected terminal and judging whether a response frame of the detected terminal meets the requirement of a check frame format so as to detect the communication protocol of the detected terminal;

the database is used for storing the detection result;

the pulse module is used for generating a pulse signal according to the signal command so as to detect the pulse acquisition function of the detected terminal;

and the direct current signal control module is used for generating direct current analog quantity so as to detect the direct current analog quantity acquisition function of the detected terminal.

2. The network automation terminal detection system of claim 1, wherein the detection means further comprises:

and the data transmission port is used for transmitting the test signal and the response result.

3. The distribution network automation terminal detection system of claim 1, wherein the programmable power supply comprises:

the voltage and current signal control module is used for generating a digital voltage and current signal according to the signal command;

the D/A conversion circuit is used for generating the digital voltage current signal into an analog voltage current signal;

and the output module is used for outputting the analog voltage and current signals to the standard meter and the detected terminal.

4. A distribution network automatic terminal detection method is characterized by comprising the following steps:

sending signal commands to an external programmable power supply, wherein the signal commands comprise: sending signal commands including voltage, current, frequency and phase angle to the programmable power supply to simulate the field operation condition so as to perform function detection including abnormal emergency, parameter setting, data acquisition, data statistics and alarm events on the detected terminal; or sending a standard signal command to the program-controlled power supply, and comparing standard data displayed by the standard table with measured data generated by the detected terminal so as to detect the alternating current sampling accuracy and the metering accuracy of the detected terminal;

the program-controlled power supply generates a test signal comprising a test voltage and a test current according to the signal command;

the detected terminal generates a response result according to the test signal;

comparing the response result with the test signal to generate a detection result and storing the detection result;

the method for detecting the distribution network automation terminal further comprises the following steps: sending a command frame to the detected terminal to detect a communication protocol of the detected terminal; or generating a pulse signal to be transmitted to the detected terminal, and comparing the generated pulse signal with the pulse acquisition information of the detected terminal so as to detect the pulse acquisition function of the detected terminal; or generating direct current analog quantity and transmitting the direct current analog quantity to the detected terminal so as to detect the direct current analog quantity acquisition function of the detected terminal.