Multifunctional electric energy quality characteristic automatic integration detection platform and detection method

Abstract

The invention discloses a multifunctional electric energy quality characteristic automatic integration detection platform and method, and belongs to the technical field of electric energy quality detection.The multifunctional electric energy quality characteristic automatic integration detection platform comprises a power grid simulator, a data acquisition device and a control system, the input end of the power grid simulator is connected with a power frequency power grid, and the output end of the power grid simulator is connected with multiple devices to be detected; the control system compiles a test scheme according to requirements, controls the on-off of the controllable switch, connects to-be-detected equipment according to requirements, carries out topology reconstruction and parameter setting of the detection system, and forms a plurality of types of test loops; the data acquisition device acquires related information of the test loop and transmits the related information to the control system, and the control system receives and stores the related information, analyzes and displays the related information and stores the related information in a background. According to the invention, a flexibly combined electric energy quality characteristic test platform architecture is adopted, the electric energy quality characteristic test of various types of equipment is realized, automatic reconstruction of loop topology is supported, and the test efficiency and expandability of the platform are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power quality detection, and in particular to a multifunctional power quality characteristic automatic integrated detection platform and a detection method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] With the continuous development of the power system and the transformation and upgrading of industrial production, photovoltaic, wind power, and energy storage account for an increasingly high proportion in the power system, and the use of equipment such as inverters and DC power supplies is becoming more and more widespread. The above equipment is a typical source of power quality interference. When working, it will bring harmonics, voltage fluctuations, imbalance and other power quality problems to the power grid; at the same time, the above equipment is also sensitive to power quality interference. Voltage sag, excessive harmonics, voltage over-limit and other problems will cause abnormal operation of the equipment, and even cause equipment damage and economic losses. Therefore, it is necessary to study the power quality disturbance characteristics and tolerance characteristics of typical power electronic equipment, guide relevant users to access and select equipment, and ensure that the power quality level of the equipment is controllable and operates normally after it is connected to the network. At the same time, in order to solve the losses caused by power quality problems, it is necessary to use APF, SVG, smart capacitors and other equipment for power quality management, and performance testing of related equipment is also required to ensure that the power quality level of the power grid meets the requirements after the equipment is connected to the network.

[0004] With the increasingly stringent requirements for power quality management, it has become essential to obtain the power quality characteristics of various types of equipment. At present, for the characteristic detection of power electronic equipment or power quality management equipment, different detection environments are often constructed manually to carry out semi-automatic detection or manual detection of equipment. Operators are required to be familiar with the test specifications and work processes of various types of equipment, and the working ability and experience level of operators are required to be high. Carrying out the power quality characteristic detection of equipment manually will bring huge pressure in terms of equipment cost, personnel allocation, capacity training, work efficiency and safety management, and will also affect the detection efficiency and detection accuracy, resulting in the inability to carry out the above work effectively. Summary of the invention

[0005] In view of the above problems, the present invention proposes a multifunctional power quality characteristic automated integrated detection platform and detection method, which adopts a flexible combination of power quality characteristic test platform architecture, realizes power quality characteristic testing of various types of equipment, supports automatic reconstruction of loop topology, and greatly improves the testing efficiency and scalability of the platform.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention provides a multifunctional power quality characteristic automated integrated detection platform, comprising a power grid simulator, a data acquisition device and a control system, wherein the input end of the power grid simulator is connected to the power frequency power grid, and the output end thereof is respectively connected to a plurality of devices to be tested through a plurality of controllable switches;

[0008] The control system compiles a corresponding test plan according to the test requirements, controls the on and off of multiple controllable switches, connects the required detection equipment according to the test requirements, automatically performs topology reconstruction and parameter setting of the detection system, and forms multiple types of test loops;

[0009] The data acquisition device acquires relevant information of the test loop and transmits the relevant information to the control system, and the control system receives, stores, analyzes, displays and stores the relevant information in the background.

[0010] As a further implementation method, it also includes structurally integrating the relevant equipment of the integrated detection platform into a cabinet structure, wherein the cabinet structure includes a signal acquisition cabinet, a network source simulation cabinet, a power quality integrated cabinet, a photovoltaic and switching power supply integrated cabinet, and a frequency converter and contactor integrated cabinet;

[0011] The signal acquisition cabinet is equipped with a data acquisition device and a control system to realize the functions of information acquisition, status detection, data processing and operation control of the entire platform;

[0012] The network source simulation cabinet is equipped with a power grid simulator, a feedback DC source and an intelligent monitoring unit to simulate abnormal power quality problems and provide battery simulation for the test of the device under test;

[0013] The power quality integrated cabinet is equipped with power quality management equipment, which is used to cooperate with the power grid simulator and the AC load cabinet to simulate the reactive power shortage, harmonic excess, and voltage sag environment for equipment management performance testing;

[0014] The photovoltaic and switching power supply integrated cabinet is installed with a device to be tested, which is used for testing the power quality disturbance characteristics and tolerance characteristics of converter type equipment and switching power supply equipment;

[0015] The inverter and contactor integrated cabinet is installed with the device to be tested, and various types of voltage sag events are generated through control, which is used for voltage sag tolerance characteristic testing of inverter and contactor type equipment.

[0016] As a further implementation method, the equipment parameter setting is that the control system sends control parameters through the local area network to configure the programmable power supply parameters, supporting test device parameters, monitoring terminal configuration and adjustment control of the device under test.

[0017] As a further implementation method, it also includes graphical modeling of various types of equipment included in the integrated detection platform, and constructing a schematic structure diagram of the platform power connection. When a specific test equipment object is selected, the power circuit of the graphical interface is automatically connected.

[0018] As a further implementation method, the control system presets typical test plans and provides corresponding test report templates according to typical test scenarios. When a preset test plan is selected, the control system automatically executes the solidified operating procedures and completes the data analysis and recording. After the test is completed, the relevant results directly fill in the test template to realize automatic preparation of the test report.

[0019] As a further implementation method, the control parameters of the relevant equipment of the integrated detection platform are encapsulated, and the control parameters include voltage, current, power, speed, torque, on and off, and duration.

[0020] As a further implementation, the integrated detection platform reserves a network interface and has the capability of remote data access and data transmission.

[0021] As a further implementation method, the data acquisition device includes a power quality analyzer, a waveform recorder, an intelligent monitoring unit and related supporting sensors, and the information collected by the data acquisition device includes voltage, current, physical quantities and information related to power quality indicators.

[0022] A second aspect of the present invention provides a multifunctional power quality characteristic automatic integrated detection method, based on a multifunctional power quality characteristic automatic integrated detection platform described in the first aspect of the present invention, comprising the following steps:

[0023] Select the equipment to be inspected;

[0024] According to the selected equipment to be inspected, the control system automatically matches the relevant supporting auxiliary devices and conducts communication status inspection;

[0025] Select the control object according to the test requirements, and configure the control parameters, control duration and execution order;

[0026] Graphically display the configured solution execution logic to verify whether the solution configuration meets the requirements;

[0027] Execute the test plan in sequence, including power circuit topology reconstruction, grid simulator parameter setting, auxiliary equipment parameter configuration and test process execution;

[0028] The test data is acquired through various monitoring terminals and displayed in graphs. After the test is completed, a test report is automatically generated based on the test content. The system returns to its initial state and ends the test task.

[0029] As a further implementation method, carrying out a communication status check includes detecting the communication status of the power quality analyzer, the data recorder and each cabinet.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] A multifunctional power quality characteristic automated integrated detection platform and detection method of the present invention adopts a flexible combination of power quality characteristic test platform architecture, including a power grid simulator, a monitoring device, a DC feedback power supply, a motor pairing device and various types of devices to be tested, thereby realizing power quality characteristic testing of multiple types of equipment and supporting automatic reconstruction of loop topology, greatly improving the platform testing efficiency and scalability.

[0032] A multifunctional power quality characteristic automated integrated detection platform and detection method of the present invention, by adopting a power quality characteristic testing method based on a graphical interface, can include processes such as selection of tested equipment, communication status check, test plan preparation and process verification, and test plan execution. The relevant processes are displayed in the form of a graphical interactive interface, which facilitates the efficient implementation of the entire system test workflow.

[0033] A multifunctional power quality characteristic automated integrated detection platform and detection method of the present invention fully considers the power quality characteristic data information collection and operation control structure. The structure includes a control system and a data acquisition device, and has the functions of test plan preparation, system loop reconstruction, equipment parameter setting, data information collection, background data analysis and automatic report preparation, etc., providing a relatively comprehensive software system architecture for automatic testing of power quality characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0035] Figure 1 It is an architecture diagram of the multifunctional power quality characteristic automatic integrated detection platform of the present invention;

[0036] Figure 2 It is a structural layout diagram of the multifunctional power quality characteristic automatic integrated detection platform of the present invention;

[0037] Figure 3 It is an electrical connection diagram of the multifunctional power quality characteristic automatic integrated detection platform of the present invention;

[0038] Figure 4 This is a diagram of the power quality disturbance characteristic detection architecture of the present invention;

[0039] Figure 5It is a schematic diagram of the power quality tolerance characteristic detection structure of the present invention;

[0040] Figure 6 This is a diagram of the power quality management equipment management characteristic detection architecture of the present invention;

[0041] Figure 7 A flowchart of the multifunctional power quality characteristic automated integrated detection method of the present invention;

[0042] Figure 8 It is a parameter setting diagram of the AC contactor temporary drop resistance test of the present invention;

[0043] Fig. 9 It is a detection scheme selection diagram for the AC contactor temporary drop resistance test of the present invention;

[0044] Fig.10 It is a test flow chart of the temporary drop resistance test of the AC contactor of the present invention;

[0045] Fig.11 It is a temporary drop resistance test curve diagram of the AC contactor of the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0048] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0049] Embodiment 1

[0050] like Figure 1 As shown, this embodiment provides a multifunctional power quality characteristic automated integrated detection platform, including a power grid simulator, a data acquisition device and a control system, wherein the input end of the power grid simulator is connected to the industrial frequency power grid, and the output end thereof is connected to a plurality of devices to be tested respectively through a plurality of controllable switches;

[0051] The control system compiles the corresponding test plan according to the test requirements, controls the on and off of multiple controllable switches, connects the required detection equipment according to the test requirements, automatically carries out the topology reconstruction and parameter setting of the detection system, and forms multiple types of test loops;

[0052] The data acquisition device collects the relevant information of the test loop and transmits the relevant information to the control system, which receives, stores, analyzes, displays and stores the relevant information in the background.

[0053] It also includes structurally integrating the relevant equipment of the integrated detection platform into a cabinet structure, and the cabinet structure includes a signal acquisition cabinet, a network source simulation cabinet, a power quality integrated cabinet, a photovoltaic and switching power supply integrated cabinet, and a frequency converter and contactor integrated cabinet.

[0054] The network source simulation cabinet is equipped with a power grid simulator, a feedback DC source, an intelligent monitoring unit and other devices. It can simulate normal operation and abnormal power quality problems such as excessive harmonics, three-phase imbalance, voltage over-limit, voltage sag, etc., and provide battery simulation for photovoltaic inverter and energy storage converter testing.

[0055] The photovoltaic and switching power supply integrated cabinet is equipped with photovoltaic inverters, energy storage converters, switching power supplies and other test equipment, which can realize the power quality disturbance characteristics and tolerance characteristics testing of converter type equipment and switching power supply equipment.

[0056] The inverter and contactor integrated cabinet is installed with the inverter to be tested, AC contactor and other devices, which can obtain the harmonic current characteristics of the inverter injected into the power grid; by controlling and generating various types of voltage sag events, it can be used for voltage sag tolerance characteristics testing of inverter and contactor equipment.

[0057] The power quality integrated cabinet is equipped with power quality management equipment such as capacitors, static VAR generators (SVG), active power filters (APF), uninterruptible power supplies (UPS), etc. It is used in conjunction with power grid simulators and AC load cabinets to simulate reactive power shortages, excessive harmonics, and voltage sag environments, and is used for performance testing of SVG, APF, capacitors, sag management, and other equipment.

[0058] Each functional cabinet is also integrated with a controllable switch, which can automatically reconstruct the platform power circuit according to the required test function.

[0059] In order to realize the automatic detection of power quality disturbance characteristics and anti-vibration characteristics of photovoltaic inverters, frequency converters, DC power supplies, contactors and other equipment, as well as the automatic test of power quality management equipment such as APF, SVG, and smart capacitors, a set of software and hardware system integration test platform is designed. The overall architecture of the platform is as follows: Figure 1As shown in the figure, the system platform consists of a test host, a power grid simulator, a regenerative DC power supply, a data acquisition device, a switch device, and a device to be tested. Among them, the power grid simulator is the power core part of the whole device. Its AC input end is connected to the industrial frequency power grid to provide energy. The AC output is connected to the converter to be tested, the DC power supply to be tested, the power quality management device to be tested, and the AC frequency converter to be tested through a controllable AC switch. The AC contact switch is controlled to be on and off according to the test function requirements, thereby forming a multi-type test circuit. In order to improve the working efficiency of the whole test platform, the converter test circuit feeds back energy to the grid through the regenerative DC power supply, and the frequency converter test circuit realizes energy feedback through the motor towing platform and the feedback frequency converter.

[0060] The actual platform structure layout is as follows Figure 2 shown.

[0061] Build a test platform. The test main device 10 is a signal acquisition cabinet, in which a data recorder 11 and a power quality detection device 13 are set. In the test main device, a terminal 12 should be left in the platform, and the space below it can be installed for the monitoring host 14. In addition, the signal acquisition cabinet is also equipped with UPS, battery packs and other equipment for safe power supply. The power quality monitoring device 13 should be in the same test main device as the data recorder 11. In some schemes, the positions of 11 and 13 can be exchanged. For the sake of clarity, these schemes and accessories are not shown in the figure.

[0062] The test main device 20 is a network source cabinet, which is equipped with a power grid simulator 23 and a feedback DC power supply 24, as well as a terminal similar to the test main device 10. At the same time, in order to monitor the electrical quantity of the test main device 20, an electricity meter 21 and an indicator light 22 are set next to the terminal. Through reasonable electrical wiring, the devices 21 and 22 can achieve the monitoring function required by the present invention. In addition, the cabinet also has switch devices such as shunts and circuit breakers that can control the circuit, which can meet the control requirements of the test circuit.

[0063] The test auxiliary equipment 30 is a power quality integrated cabinet. The power quality management equipment described in the present invention is a common power quality equipment, including but not limited to intelligent capacitors, static VAR generators (SVG) and active filters (APF), uninterruptible power supplies (UPS), DVRs, etc., which can be placed in the spaces shown in 31, 32 and 33 according to actual needs. The test auxiliary equipment 30 provides a test environment for the power quality management equipment, including the above-mentioned terminals, electric meters and indicator lights. Voltage and current transformers are added at the switch nodes to ensure that the power quality management equipment works normally while collecting high-precision voltage and current data. The test main equipment 50 and 60 both represent RLC loads and RCD nonlinear loads. The monitoring loop is constructed with the test main equipment 10 as needed, and is connected to the power grid simulator of the main equipment 20 to cooperate in constructing a power quality simulation environment for power quality management equipment management performance detection.

[0064] The test auxiliary equipment 40 is a photovoltaic and DC power supply cabinet, which provides a test environment for photovoltaic inverters and DC power supplies, including the above-mentioned terminals, electric meters, indicator lights and related sensors. The photovoltaic inverter 41 is hung at a fixed position of the test auxiliary equipment 40, and the test wiring is completed with the test main equipment 10 and 20, which is used to build a photovoltaic inverter test environment. In order to further improve the space utilization of the test cabinet, the auxiliary test equipment 40 is also used for DC power supply testing. The programmable DC AC power supply 42 and DC load 43 provide auxiliary support for DC power supply testing, and construct a power test circuit with the DC power supply 44. The sensors in the panel cabinet and the test main equipment 10 are used to construct a data acquisition circuit, which can realize the DC power supply power quality characteristic test.

[0065] The test auxiliary equipment 70 is a frequency converter and contactor integrated cabinet, which also contains terminal blocks, electric meters, indicator lights and signal sensors. The tested device 71 is the tested frequency converter. The test auxiliary equipment 73 is an AC motor simulation system, which includes a motor support platform, a feedback frequency converter and torque, speed and electrical quantity sensors. The tested frequency converter 71, the power grid simulator 23, and the AC motor simulation system 73 construct a frequency converter test circuit. The torque, speed, voltage, current and other information and the monitoring host also constitute a test circuit, which needs to be tested and recorded according to the power quality characteristics of the frequency converter. The tested device 74 is the tested AC contactor, which uses one or more groups in parallel to increase the number and type of tests; the test auxiliary equipment 72 is a contactor acquisition interface, which is connected in series between the tested contactor 74 and the power grid simulator 23, so that the background monitoring host 14 can read the contactor interface status information in real time.

[0066] The specific electrical connection method of the power quality characteristic test platform is as follows Figure 3As shown, the AC power is input into the power grid simulator (bidirectional AC power supply) through the main incoming line switch, and the output of the power grid simulator constitutes the system AC bus. The AC bus is connected to the power quality integrated cabinet, photovoltaic and DC power supply cabinet, AC load cabinet and inverter and contactor integrated cabinet through the switch circuit breaker. Various types of voltage, current, torque and speed sensors are placed in each cabinet as needed. The power quality integrated cabinet is powered by the main switch of the cabinet, and multiple AC contactors are connected in parallel inside to realize the connection of power quality management devices such as APF, SVG, and intelligent capacitors to be tested. The cabinet has reserved terminals for external device connection and flexible circuit reconstruction; the photovoltaic and DC power supply cabinet is connected to the photovoltaic inverter (energy storage converter) to be tested, the DC power supply to be tested, and the reserved terminals through multiple AC contactors. When testing the photovoltaic inverter, the corresponding AC and DC switches are closed, and the DC power supply feedback from the network source cabinet is connected to realize circuit construction. When testing the DC power supply, the corresponding AC contactor is closed and the DC electronic load is connected; the AC load cabinet is connected to the RLC load and RCD load through parallel AC contactors to provide reactive power and harmonic simulation; the inverter and contactor integrated cabinet is used for contactor and inverter characteristic testing. When testing the contactor, the corresponding switch is closed and the contactor to be tested is connected. When testing the inverter, the inverter test circuit is closed and the motor drag device and the feedback unit are connected. The terminal switch is connected by closing the bypass contactor, which can be used for flexible construction of other inverter tests.

[0067] Test plan editing can develop test plans for power quality disturbance characteristics and tolerance characteristics of electrical equipment and management equipment management according to functional requirements.

[0068] Methods for detecting and implementing power quality disturbance characteristics, such as Figure 4 As shown, the power quality disturbance characteristic test structure of the equipment under test is constructed according to the schematic diagram. The monitoring host controls the power grid simulator to output the industrial frequency voltage. After the equipment under test is turned on, the host computer controls the equipment under test to operate in a specific state, and the voltage and current signals of the equipment under test are obtained through the isolation probe. The power quality analyzer and waveform recorder are used to obtain the power quality disturbance characteristic data and analyze the power quality information such as harmonics, unbalance, flicker, voltage fluctuation, etc., to achieve the goal of power quality disturbance characteristic testing.

[0069] Power quality tolerance characteristics detection implementation method, such as Figure 5As shown in the figure, the power quality tolerance characteristic test of the equipment under test is carried out according to the schematic diagram. The monitoring host controls the power grid simulator to output the industrial frequency voltage. After the equipment under test is turned on, the host computer controls the equipment under test to operate in a specific state, controls the power grid simulator and the load working state, so as to create power quality events such as imbalance, harmonics, and voltage sag. The voltage and current signals of the equipment under test are obtained through the probe, and the power quality analyzer and waveform recorder are used to obtain and analyze the power quality disturbance characteristic data to check whether the equipment under test can operate normally under the given power quality event conditions, thereby achieving the goal of power quality anti-disturbance characteristic test.

[0070] Methods for detecting and implementing the management characteristics of power quality management equipment, such as Figure 6 As shown, complete the electrical connection according to the schematic diagram, control the host to control the power grid simulator to output the industrial frequency voltage, create unbalanced, harmonic, reactive power and other power quality events through the power grid simulator and the load, and use the power quality analyzer and waveform recorder to record the current power quality event status; put APF / SVG / intelligent capacitors into use to treat power quality events, and after they stabilize, record the current power quality level, and use the power quality analyzer and waveform recorder to obtain and analyze the treatment data before, after and after treatment, analyze the level and performance of APF / SVG / intelligent capacitors and other equipment in treating power quality events, and determine whether they are qualified, thereby realizing the treatment characteristics effect verification test of the treatment equipment.

[0071] Embodiment 2

[0072] This embodiment provides a multifunctional power quality characteristic automatic integrated detection method, based on a multifunctional power quality characteristic automatic integrated detection platform of the first embodiment, including the following steps:

[0073] Select the equipment to be inspected;

[0074] According to the selected equipment to be inspected, the control system automatically matches the relevant supporting auxiliary devices and conducts communication status inspection;

[0075] Select the control object according to the test requirements, and configure the control parameters, control duration and execution order;

[0076] Graphically display the configured solution execution logic to verify whether the solution configuration meets the requirements;

[0077] Execute the test plan in sequence, including power circuit topology reconstruction, grid simulator parameter setting, auxiliary equipment parameter configuration and test process execution;

[0078] The test data is acquired through various monitoring terminals and displayed in graphs. After the test is completed, a test report is automatically generated based on the test content. The system returns to its initial state and ends the test task.

[0079] Among them, the communication status check includes testing the communication status of the power quality analyzer, data recorder and each cabinet.

[0080] Multifunctional automated power quality detection integrated platform fully automatic detection process, such as Figure 7 As shown, the multifunctional automated power quality detection integrated platform provided by the present invention can detect a variety of devices. Different devices under test have different test circuits, and users can select the devices under test according to the detection requirements.

[0081] (1) Select the device under test. By clicking on the selected device under test, you can view the test power circuit and test energy flow. Double-clicking the selected device under test can enter the "Device Parameter Setting" interface of the device under test. In the specific implementation process, this step is implemented using the control host.

[0082] (2) Communication status detection. The platform will automatically match the communication status detection of the power circuit where the equipment under test is located according to the selected equipment under test, including the communication status detection of the power quality analyzer, data recorder, network source cabinet, power quality integrated cabinet, inverter and contactor integrated cabinet, photovoltaic and switching power supply integrated cabinet. After the communication status detection is correct, the next step can be implemented. In the specific implementation process, this step is automatically completed by the background of the detection system.

[0083] (3) Basic information settings. This section specifically includes the inspected equipment, task name, manufacturer, inspection unit, inspection personnel, inspection category, inspection date, entrusting unit, atmospheric pressure, temperature, humidity, etc.

[0084] (4) Detection scheme selection. The multifunctional automated power quality detection integrated platform provided by the present invention allows users to select appropriate detection schemes according to their needs. The detection schemes can be manually arranged in card format or can be tested using existing detection schemes set in advance in the background. The detection schemes have the functions of editing, adding, deleting, and saving schemes.

[0085] (5) Execution of the detection scheme. After the detection scheme is selected, the detection scheme execution step can be started. The multifunctional automatic power quality detection integrated platform provided by the present invention will send control instructions to relevant equipment according to the parameters set in the detection scheme, including grid source parameter setting, switch control initialization, and full test process control according to the test step sequence and time setting. After the detection scheme is executed, the detection report can be downloaded at any time to view the detection results.

[0086] Taking the drawing of the voltage sag tolerance characteristics of the AC contactor test as an example, the specific test steps are described.

[0087] (1) Operate the page flow contactor on the detection platform system, such as Figure 8As shown, double-click the AC contactor button to enter the "Device Parameter Setting" page of the AC contactor, automatically perform a self-test of the communication status of the relevant equipment, enter the test scheme selection page after entering the parameters of the equipment to be tested.

[0088] (2) Select the "Test Plan" page, such as Fig. 9 As shown. Select AC contactor tolerance characteristic test. AC contactor VTC curve drawing test includes three working conditions, sag start angle, phase jump, and harmonic content. Users can select one or more working conditions for testing according to specific testing needs. After the test plan is selected, click the VTC tolerance matrix control module to view the specific parameters of the plan, and you can also modify the plan.

[0089] (3) Click Next to enter the "Confirm Test Task" page. This page contains a bar chart and a test flow chart, such as Fig.10 During the actual test, you can check the test progress according to the test flow chart. After confirming that the test plan is correct, click Next to enter the "Data Test" page.

[0090] (4) Start the fully automatic test of the equipment under test, and send the test data to the monitoring host. The host computer processes the data according to the algorithm and draws the tolerance characteristic test curve, such as Fig.11 As shown, at the same time, other devices are controlled to reset their status and prepare for the next group of test initialization.

[0091] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0092] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A multifunctional power quality characteristics automated integrated detection platform, characterized in that: It includes a power grid simulator, a data acquisition device and a control system, wherein the input end of the power grid simulator is connected to the power frequency power grid, and the output end thereof is connected to a plurality of devices to be tested respectively through a plurality of controllable switches; The control system compiles a corresponding test plan according to the test requirements, controls the on and off of multiple controllable switches, connects the required detection equipment according to the test requirements, automatically performs topology reconstruction and parameter setting of the detection system, and forms multiple types of test loops; The data acquisition device acquires relevant information of the test loop and transmits the relevant information to the control system, and the control system receives, stores, analyzes, displays and stores the relevant information in the background.

2. A multifunctional power quality characteristic automated integrated detection platform as claimed in claim 1, characterized in that: It also includes structurally integrating the relevant equipment of the integrated detection platform into a cabinet structure, wherein the cabinet structure includes a signal acquisition cabinet, a network source simulation cabinet, a power quality integrated cabinet, a photovoltaic and switching power supply integrated cabinet, and a frequency converter and contactor integrated cabinet; The signal acquisition cabinet is equipped with a data acquisition device and a control system to realize the functions of information acquisition, status detection, data processing and operation control of the entire platform; The network source simulation cabinet is equipped with a power grid simulator, a feedback DC source and an intelligent monitoring unit to simulate abnormal power quality problems and provide battery simulation for the test of the device under test; The power quality integrated cabinet is equipped with power quality management equipment, which is used to cooperate with the power grid simulator and the AC load cabinet to simulate the reactive power shortage, harmonic excess, and voltage sag environment for equipment management performance testing; The photovoltaic and switching power supply integrated cabinet is installed with a device to be tested, which is used for testing the power quality disturbance characteristics and tolerance characteristics of converter type equipment and switching power supply equipment; The inverter and contactor integrated cabinet is installed with the device to be tested, and various types of voltage sag events are generated through control, which is used for voltage sag tolerance characteristic testing of inverter and contactor type equipment.

3. A multifunctional power quality characteristic automated integrated detection platform as claimed in claim 1, characterized in that: Equipment parameter setting is the control system sending control parameters through the local area network, configuring programmable power supply parameters, supporting test device parameters, monitoring terminal configuration and adjustment control of the device under test.

4. A multifunctional power quality characteristic automated integrated detection platform as claimed in claim 1, characterized in that: It also includes graphical modeling of various types of equipment included in the integrated testing platform, and construction of a schematic structure diagram of the platform power connection. When a specific test equipment object is selected, the power circuit of the graphical interface is automatically connected.

5. A multifunctional power quality characteristic automated integrated detection platform as claimed in claim 1, characterized in that: The control system presets typical test plans and provides corresponding test report templates according to typical test scenarios. When a preset test plan is selected, the control system automatically executes the solidified operating procedures and completes the data analysis and recording. After the test is completed, the relevant results directly fill in the test template to realize automatic preparation of the test report.

6. A multifunctional power quality characteristic automated integrated detection platform as claimed in claim 3, characterized in that: The control parameters of the relevant equipment of the integrated detection platform are encapsulated, and the control parameters include voltage, current, power, speed, torque, on / off and duration.

7. A multifunctional power quality characteristic automated integrated detection platform as claimed in claim 1, characterized in that: The integrated detection platform reserves a network interface and has the capabilities of remote data access and data transmission.

8. The multifunctional power quality characteristic automatic integrated detection platform according to claim 1, characterized in that: The data acquisition device includes a power quality analyzer, a waveform recorder, an intelligent monitoring unit and related supporting sensors. The information collected by the data acquisition device includes voltage, current, physical quantities and information related to power quality indicators.

9. A multifunctional integrated automatic detection method for power quality characteristics, characterized in that: A multifunctional power quality characteristic automated integrated detection platform according to any one of claims 1 to 8 comprises the following steps: Select the equipment to be inspected; According to the selected equipment to be inspected, the control system automatically matches the relevant supporting auxiliary devices and conducts communication status inspection; Select the control object according to the test requirements, and configure the control parameters, control duration and execution order; Graphically display the configured solution execution logic to verify whether the solution configuration meets the requirements; Execute the test plan in sequence, including power circuit topology reconstruction, grid simulator parameter setting, auxiliary equipment parameter configuration and test process execution; The test data is acquired through various monitoring terminals and displayed in graphs. After the test is completed, a test report is automatically generated based on the test content. The system returns to its initial state and ends the test task.

10. A multifunctional power quality characteristic automatic integrated detection method according to claim 9, characterized in that: Carrying out communication status inspection includes testing the communication status of the power quality analyzer, data recorder and each cabinet.

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