Detection Method and System of Wideband Measurement System

Abstract

The present invention discloses a detection method and system for a broadband measurement system, relating to the technical field of power detection, and mainly aiming to solve the problem of relatively low detection efficiency of the broadband measurement system. It mainly includes obtaining detection parameters for detecting the broadband measurement system; sending the detection parameters to the broadband detection device of the measurement substation where it is located, so that the broadband detection device sends a detection electrical signal meeting the detection parameters to at least one broadband measurement device of the measurement substation; determining a target detection result based on the measurement result of the obtained broadband measurement system, and the target detection result includes at least one of the substation detection result and the main station detection result. It is mainly used for detecting the broadband measurement system.

Description

Technical Field

[0001] The present invention relates to the technical field of power detection, and particularly to a detection method and system for a broadband measurement system. Background Art

[0002] A broadband measurement device is a new type of measurement device used for broadband monitoring and control of the power grid. Through high-frequency sampling technology greater than 12.8 kHz and broadband synchronous phasor measurement algorithms, it has the ability to measure the fundamental wave, interharmonics / harmonics of the power grid in real time, and realizes the monitoring function of various broadband oscillation signals. It provides technical support for the safe, stable and reliable operation of the new power system. However, there are many manufacturers of existing broadband measurement devices, and the quality is uneven, so it is impossible to ensure the accuracy and reliability of broadband grid monitoring.

[0003] The existing method for detecting broadband measurement devices mainly relies on manual work, and uses general detection equipment to confirm the functions and performances of each device in the broadband measurement system one by one. This method has low detection integrity and accuracy for the broadband measurement system, and the detection time is long, which cannot meet the efficiency requirements of the existing on-site detection of the broadband measurement system. Summary of the Invention

[0004] In view of this, the present invention provides a detection method and system for a broadband measurement system, mainly aiming to solve the problem of low detection efficiency of the existing broadband measurement system.

[0005] According to one aspect of the present invention, a detection method for a broadband measurement system is provided, including:

[0006] Obtaining detection parameters for detecting the broadband measurement system;

[0007] Sending the detection parameters to a broadband detection device of the measurement substation where it is located, so that the broadband detection device sends a detection electrical signal meeting the detection parameters to at least one broadband measurement device of the measurement substation;

[0008] Determining a target detection result based on the measurement result of the broadband measurement system obtained, where the target detection result includes at least one of a substation detection result and a master station detection result.

[0009] Further, the detection includes master station detection and substation detection, and obtaining the detection parameters for detecting the broadband measurement system includes:

[0010] In the case of master station detection, obtaining the target joint detection parameters of the measurement substation where it is located from a multi-substation joint detection parameter set sent from a remote detection control center, where the multi-substation joint detection parameter set includes substation detection parameters and substation signal delay parameters corresponding to different measurement substations;

[0011] In the case of sub-station detection, obtain independent detection parameters that match the measurement device information of the measurement sub-station.

[0012] Further, the broadband detection device sends the detection electrical signal that meets the detection parameters to at least one broadband measurement device of the measurement sub-station, including:

[0013] In the case of master-station detection, the broadband detection device generates a first detection electrical signal according to the sub-station detection parameters in the target joint detection parameters, and sends the first detection electrical signal to the broadband measurement device according to the sub-station signal delay parameter;

[0014] In the case of sub-station detection, the broadband detection device generates a second detection electrical signal according to the independent detection parameters, and sends the second detection electrical signal to the broadband measurement device.

[0015] Further, the broadband detection device generates a second detection electrical signal according to the independent detection parameters, including:

[0016] Generate a clock synchronization digital signal according to the Beidou clock parameter and the independent detection parameters;

[0017] Generate an AC analog initial signal according to the clock synchronization digital signal;

[0018] Through power amplification processing and signal feedback processing on the AC analog initial signal in sequence, obtain a second detection electrical signal, where the second detection electrical signal includes a broadband AC current signal and a broadband AC voltage signal, and the broadband AC current signal and the broadband AC voltage signal are synchronous output signals.

[0019] Further, determining the target detection result according to the measurement result of the obtained broadband measurement system includes:

[0020] Obtain the sub-station measurement result of the broadband measurement device from the broadband data processing device of the measurement sub-station;

[0021] Determine the sub-station detection result according to the comparison result between the sub-station measurement result and the detection electrical signal, where the sub-station detection result includes a sub-station basic function detection result and a sub-station basic performance detection result; and / or,

[0022] Send the sub-station measurement result to the remote detection control center, so that the remote detection control center determines the master-station detection result according to the sub-station measurement results of the global measurement sub-stations.

[0023] Further, the remote detection control center determines the master-station detection result according to the sub-station measurement results of the global measurement sub-stations, including:

[0024] The remote detection control center obtains the master station monitoring results of the power grid monitored by the measurement master station side;

[0025] Based on the master station monitoring results and the sub-station measurement results of the global measurement sub-stations, determine the master station detection results of the broadband measurement system, and the master station detection results at least include one of the detection results of the power grid operation dynamic monitoring function, dynamic data acquisition function, online disturbance identification function and analysis function of the master station.

[0026] According to another aspect of the present invention, there is provided a detection system for a broadband measurement system, including:

[0027] A broadband detection control device and a broadband detection device, wherein the broadband detection control device is communicatively connected to the broadband detection device in the same measurement sub-station;

[0028] The broadband detection control device is configured to obtain detection parameters for detecting the broadband measurement system; send the detection parameters to the broadband detection device in the measurement sub-station where it is located; determine target detection results according to the measurement results of the broadband measurement system obtained, and the target detection results at least include one of the sub-station detection results and the master station detection results.

[0029] The broadband detection device is configured to send detection electrical signals that meet the detection parameters to at least one broadband measurement device in the measurement sub-station.

[0030] Further, the system further includes a remote detection control center, and the remote detection control center is communicatively connected to the broadband detection control device;

[0031] The broadband detection control device is specifically configured to, in the case of master station detection, obtain the target joint detection parameters of the measurement sub-station where it is located from the multi-sub-station joint detection parameter set sent by the remote detection control center, and the multi-sub-station joint detection parameter set includes sub-station detection parameters and sub-station signal delay parameters corresponding to different measurement sub-stations; in the case of sub-station detection, obtain independent detection parameters that match the measurement device information of the measurement sub-station;

[0032] The remote detection control center is configured to send a multi-sub-station joint detection parameter set to the broadband detection control device.

[0033] Further, the broadband detection device is specifically configured to, in the case of the master station detection, generate a first detection electrical signal according to the slave station detection parameter in the target joint detection parameter, and send the first detection electrical signal to the broadband measurement device according to the slave station signal delay parameter; in the case of the slave station detection, the broadband detection device generates a second detection electrical signal according to the independent detection parameter and sends the second detection electrical signal to the broadband measurement device.

[0034] Further, the broadband detection device is specifically configured to generate a clock synchronization digital signal according to the Beidou clock parameter and the independent detection parameter; generate an AC analog initial signal according to the clock synchronization digital signal; obtain a second detection electrical signal by performing power amplification processing and signal feedback processing on the AC analog initial signal in sequence, where the second detection electrical signal includes a broadband AC current signal and a broadband AC voltage signal, and the broadband AC current signal and the broadband AC voltage signal are synchronous output signals.

[0035] Further, the broadband detection control device is further configured to obtain the slave station measurement result of the broadband measurement device from the broadband data processing device of the measurement slave station;

[0036] determine the slave station detection result according to the comparison result between the slave station measurement result and the detection electrical signal, where the slave station detection result includes a slave station basic function detection result and a slave station basic performance detection result; and / or,

[0037] send the slave station measurement result to the remote detection control center, so that the remote detection control center determines the master station detection result according to the slave station measurement result of the global measurement slave station.

[0038] Further, the remote detection control center is further configured to obtain the master station monitoring result of the power grid monitored by the master station side; determine the master station detection result of the broadband measurement system according to the master station monitoring result and the slave station measurement result of the global measurement slave station, where the master station detection result includes at least one of the detection results of the power grid operation dynamic monitoring function, dynamic data acquisition function, online disturbance identification function, and analysis function of the master station.

[0039] By means of the above technical solutions, the technical solutions provided by the embodiments of the present invention have at least the following advantages:

[0040] The present invention provides a detection method and system for a broadband measurement system. In an embodiment of the present invention, detection parameters for detecting the broadband measurement system are obtained; the detection parameters are sent to a broadband detection device of a measurement sub-station where the detection parameters are located, so that the broadband detection device sends a detection electrical signal that meets the detection parameters to at least one broadband measurement device of the measurement sub-station; a target detection result is determined based on the measurement result of the obtained broadband measurement system, and the target detection result includes at least one of a sub-station detection result and a main-station detection result. The detection time of the broadband measurement system is greatly reduced, the detection complexity is reduced, and at the same time, comprehensive detection of the sub-station and the main-station in the broadband measurement system is realized, thereby greatly improving the detection efficiency of the broadband measurement system.

[0041] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically illustrates the specific embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0043] Figure 1 The flowchart of a detection method for a broadband measurement system provided by an embodiment of the present invention is shown;

[0044] Figure 2 The schematic diagram of the connection relationship of a sub-station detection device provided by an embodiment of the present invention is shown;

[0045] Figure 3 The flowchart of another detection method for a broadband measurement system provided by an embodiment of the present invention is shown;

[0046] Figure 4 The schematic diagram of the composition structure of a broadband detection control device provided by an embodiment of the present invention is shown;

[0047] Figure 5 The schematic diagram of the composition structure of a broadband detection device provided by an embodiment of the present invention is shown;

[0048] Figure 6 The schematic diagram of the connection relationship of a main-station detection device provided by an embodiment of the present invention is shown;

[0049] Figure 7 The block diagram of the composition of a detection system for a broadband measurement system provided by an embodiment of the present invention is shown. Specific Embodiments

[0050] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0051] Regarding the problems that the detection integrity and accuracy of the broadband measurement system are relatively low, the detection time is relatively long, and it cannot meet the detection efficiency requirements for on-site detection of existing broadband measurement devices. Embodiments of the present invention provide a detection method for a broadband measurement system, as Figure 1 shown, the method includes the following steps:

[0052] 101. Obtain detection parameters for detecting the broadband measurement system.

[0053] In embodiments of the present invention, the broadband measurement system includes a measurement master station and measurement slave stations. The measurement slave stations are usually configured in substations or power generation plants, that is, each power generation plant corresponds to a measurement slave station. The measurement slave station includes at least one broadband measurement device and a broadband data processing device, and the installation positions of the broadband measurement device and the broadband data processing device are not in the same cabinet. For example, in substations above 500 kV or large power plants, the broadband measurement device and the broadband data processing device are installed in different interval compartments. Among them, the broadband measurement device is used to measure broadband data in the power line, and the broadband data processing device is used to receive the broadband data measured by each broadband measurement device and process it to obtain the substation measurement result. The measurement master station does not include actual broadband measurement devices and broadband data processing devices, and is used to collect the broadband measurement results of each measurement slave station and perform summary and analysis based on the measurement results of the global measurement slave stations to achieve global monitoring of the power grid.

[0054] The detection types of the broadband measurement system include substation detection and master station detection. The current execution entity is a broadband detection control device, which is configured with a wireless communication module, a Bluetooth communication module, and a wired communication module. Data communication can be achieved with the broadband detection device in the same measurement slave station based on any one of the above modules, and data communication can be achieved with the master station control center based on the wireless communication module. The obtained detection parameters are used to characterize the characteristics of the electrical signal that needs to be output by the broadband detection device to the broadband measurement device. Among them, the connection between the broadband detection device and the broadband detection control device will be established according to the on-site detection conditions. If the two devices are far apart, a small WIFI base station will be set up to establish a wireless connection between the two devices; if the two devices are close to each other, they can be directly connected through a network cable.

[0055] 102. Send the detection parameters to the broadband detection device of the measurement substation where it is located, so that the broadband detection device sends the detection electrical signal that meets the detection parameters to at least one broadband measurement device of the measurement substation.

[0056] In the embodiment of the present invention, as Figure 2 shown, it is a device connection diagram for detecting any broadband measurement substation. Among them, the input end of the broadband detection device is connected to the output end of the broadband detection control device, the output end is connected to the measurement ends of each broadband measurement device in the measurement substation, and the output end of the broadband data processing device is connected to the measurement result acquisition interface of the broadband detection control device. Each broadband measurement device sends the measured broadband data to the broadband data processing device, and the substation measurement result processed by the broadband data processing device is sent back to the broadband detection control device. The broadband detection device, as a broadband AC signal source, outputs a detection electrical signal that meets the detection parameter requirements to each broadband measurement device in the broadband measurement system to simulate the characteristics of the measured signal in the power grid line, thereby simulating the process of the broadband measurement device measuring the electrical signal in the power grid.

[0057] 103. Determine the target detection result based on the measurement result of the obtained broadband measurement system.

[0058] In the embodiment of the present invention, the target detection result includes at least one of the substation detection result and the master station detection result. The measurement result of the broadband measurement system includes the substation measurement result and / or the master station monitoring result, that is, when detecting the substation, the substation detection result can be determined only based on the characteristics of the substation measurement result and the electrical signal sent by the broadband detection device; when detecting the master station, it is necessary to conduct a comprehensive analysis based on the substation measurement result and the master station monitoring result to determine the master station detection result. The master station detection and the substation detection can be carried out separately, or when detecting the master station, the detection result of the corresponding substation can be determined based on the measurement results of each substation. The embodiment of the present invention does not make specific limitations.

[0059] It should be noted that by outputting a detection electrical signal that meets the detection parameters to the broadband measurement device of the measurement substation and determining the detection result of the broadband measurement system according to the measurement results of the broadband measurement devices in each measurement substation, the automatic detection of the broadband measurement system is realized, greatly reducing the dependence on manual work during the detection process, greatly reducing the measurement time, and at the same time, ensuring the accuracy and comprehensiveness of the detection, thereby effectively improving the detection efficiency of the broadband measurement system.

[0060] In an embodiment of the present invention, for further illustration and limitation, as Figure 3 shown, step 101 of obtaining the detection parameters for detecting the broadband measurement system includes:

[0061] 201. In the case of the master station detection, obtain the target joint detection parameters of the measurement sub-station where it is located from the multi-sub-station joint detection parameter set sent from the remote detection control center.

[0062] 202. In the case of the sub-station detection, obtain the independent detection parameters that match the measurement device information of the measurement sub-station.

[0063] In the embodiments of the present invention, a part of the measurement results of the measurement master station is obtained through comprehensive analysis based on the results of each measurement sub-station. Therefore, in the case of the master station detection, it is necessary to uniformly and coordinately control the broadband detection devices of all measurement sub-stations under the measurement master station, so that the measurement results of each measurement sub-station meet the overall electrical signal distribution characteristics of the power grid, thereby realizing the detection of the comprehensive analysis ability of the measurement master station. The broadband detection control devices of each measurement sub-station obtain the target joint detection parameters that match the measurement sub-station where they are located from the multi-sub-station joint detection parameter set sent from the remote detection control center. Among them, the matching process can be based on attribute information such as the number and name of the measurement sub-station, and the embodiments of the present invention do not make specific limitations. The multi-sub-station joint detection parameters include sub-station detection parameters corresponding to different measurement sub-stations and sub-station signal delay parameters.

[0064] It should be noted that the sub-station signal delay parameters are determined by performing oscillation simulation processing according to the detection item information and the layout information of the global measurement sub-stations. Since different measurement sub-stations are distributed at different positions in the power grid, there is a certain delay in the appearance time of the same characteristic electrical signal in each measurement sub-station. It is necessary for the broadband detection devices in different measurement sub-stations to output electrical signals at different times, that is, the detection parameters of each measurement sub-station are different, in order to meet the requirements of the measurement master station for analyzing the measurement results of the measurement sub-stations. Therefore, before the detection, it is necessary to perform oscillation simulation tests according to the layout information of the global measurement sub-stations (such as the transmission distance or time of the power grid between the measurement sub-stations) to determine the signal delay of each measurement sub-station, that is, the sub-station signal delay parameters. Among them, the sub-station signal delay parameters of each measurement sub-station are based on the Beidou clock as a reference, so that each broadband detection device outputs electrical signals in coordination, ensuring the accuracy and reliability of the signal source, thereby realizing the accurate detection of the master station analysis function.

[0065] In the case of the sub-station detection, the independent detection parameters of each measurement sub-station can be uniformly sent from the remote detection control center, or can be configured by the user based on the detection conditions and detection requirements of the current measurement sub-station. The embodiments of the present invention do not make specific limitations. For example Figure 4As shown in the figure, in addition to the WIFI wireless communication module, Bluetooth communication module, wired communication module, and measurement result acquisition interface, the broadband detection control device further includes an external input interface and a display output interface. It can be used to receive the test parameters input by the user through the input device, and can also display all detection items, so that the user can configure the detection parameters for the measurement substation in a visual selection manner. The independent detection parameters of each measurement substation can be the same or different, and can be customized according to specific application scenarios. The embodiments of the present invention do not make specific limitations.

[0066] In an embodiment of the present invention, for further illustration and limitation, the broadband detection device sends the detection electrical signal that meets the detection parameters to at least one broadband measurement device of the measurement substation, including:

[0067] In the case of master station detection, the broadband detection device generates a first detection electrical signal according to the substation detection parameters in the target joint detection parameters, and sends the first detection electrical signal to the broadband measurement device according to the substation signal delay parameter;

[0068] In the case of substation detection, the broadband detection device generates a second detection electrical signal according to the independent detection parameters, and sends the second detection electrical signal to the broadband measurement device.

[0069] In the embodiments of the present invention, in the case of master station detection, the broadband measurement devices of each measurement substation can output electrical signals to the broadband measurement devices in the substation according to different signal delays based on the target joint detection parameters issued by the remote broadband control device, realizing the collaborative control of the broadband detection devices between each substation, so as to meet the overall data analysis requirements of the master station detection for each measurement substation in the power grid.

[0070] It should be noted that the broadband detection device is constructed based on a clock-synchronized broadband signal source, broadband current and voltage amplification devices, combined with an analog and digital two-stage feedback mechanism, and can realize the clock-synchronized output function of broadband analog signals. The detection electrical signals that the broadband detection device can generate at least include one of a three-phase alternating current signal, voltage signal, analog low-frequency oscillation signal, sub-synchronous oscillation signal, super-synchronous oscillation signal, and broadband oscillation signal synchronized with the second pulse of the positioning system, which can fully cover the signal abnormal conditions that may occur in the power grid, so as to meet the all-round detection requirements for broadband measurement devices.

[0071] In an embodiment of the present invention, for further illustration and limitation, the broadband detection device generates a second detection electrical signal according to the independent detection parameters, including:

[0072] Generate a clock-synchronized digital signal according to the Beidou clock parameter and the independent detection parameter;

[0073] Generate an AC analog initial signal according to the clock synchronization digital signal;

[0074] Through sequentially performing power amplification processing and signal feedback processing on the AC analog initial signal, a second detection electrical signal is obtained.

[0075] In an embodiment of the present invention, the second detection electrical signal includes a broadband AC current signal and a broadband AC voltage signal, and the broadband AC current signal and the broadband AC voltage signal are synchronous output signals. As a signal source for providing a detection signal, the broadband detection device can output a broadband AC electrical signal within a signal frequency range of 0 to 4 KHz, a voltage range of 0 to 100 V, and an output current of 0 to 5 A according to the requirements of detection parameters, so as to provide an accurate electrical signal for the detection of the broadband measurement system and solve the problem of the existing lack of a broadband AC signal source. For example Figure 5As shown in the figure, it is a schematic diagram of the composition of a broadband detection device, including a main control system, a Beidou clock synchronization module, a clock synchronization broadband signal source generation module, a voltage feedback loop, a broadband voltage high-speed power amplification module, a voltage output loop, a clock synchronization voltage acquisition module, a current feedback loop, a broadband current high-speed power amplification module, a current output loop, and a clock synchronization current acquisition module. Among them, the main control system is mainly used for the instruction setting, function control, output digital feedback control, external input / output control, and communication control functions of the device. The clock synchronization broadband signal source generation module is mainly used to generate clock-synchronized digital signals and convert and output AC analog small signals (AC analog initial signals) in various frequency ranges. The broadband voltage high-speed power amplification module is mainly used to achieve the fast power amplification of AC analog small signals, amplifying small voltages to AC voltage signals in the range of 0-100V; the broadband current high-speed power amplification module is mainly used to achieve the fast power amplification of AC analog small signals, amplifying small currents to AC voltage signals in the range of 0-5A. In order to ensure the accuracy and stability of the output of large currents and large voltages, signal feedback processing is required. The voltage feedback loop and the current feedback loop mainly serve as the primary feedback of the above broadband current and voltage high-speed power amplification modules to solve the accuracy and stability problems of the output current and voltage, and ensure that the output current and voltage meet the measurement requirements of the broadband measurement system. The clock synchronization voltage and current acquisition modules sample, mainly to solve the problem of synchronous accuracy of broadband current and voltage. Through high-precision sampling resistors and A / D sampling modules, fast and accurate feedback measurements of current and voltage are achieved, and the results are fed back to the main control system to adjust the amplitude and synchronous phase of the output voltage and current. The current and voltage output loops are mainly used to increase the safety protection output function to ensure the safety of the main circuit of the device in scenarios such as current open circuit and voltage short circuit. The clock synchronization broadband signal source generates current and voltage digital signals of a specified frequency according to the main control system instructions (generated based on detection parameters), converts them into analog voltage and current small signals through D / A, amplifies them by the broadband current and voltage high-speed power amplification modules, and then samples them through the clock synchronization voltage and current acquisition modules and performs secondary feedback of analog and digital to achieve the synchronous output of broadband AC current signals and broadband AC voltage signals.

[0076] It should be noted that the generation process of the first detection electrical signal generated by the broadband detection device according to the sub-station detection parameters in the target joint detection parameters is the same as that of the second detection electrical signal, and will not be elaborated here.

[0077] In an embodiment of the present invention, for further illustration and limitation, determining the target detection result based on the measurement result of the obtained broadband measurement system includes:

[0078] Obtain the sub-station measurement result of the broadband measurement device from the broadband data processing device of the measurement sub-station;

[0079] Determine the sub-station detection result according to the comparison result between the sub-station measurement result and the detected electrical signal, where the sub-station detection result includes the sub-station basic function detection result and the sub-station basic performance detection result; and / or,

[0080] Send the sub-station measurement result to the remote detection control center, so that the remote detection control center determines the main-station detection result according to the sub-station measurement result of the global measurement sub-station.

[0081] In the embodiments of the present invention, according to different detection requirements, the measurement sub-station or the measurement main-station can be detected separately, or the sub-station can be detected while the main-station is being detected. Therefore, the sub-station measurement result obtained by the broadband detection control device can be used to determine the sub-station detection result or the main-station detection result, that is, whether it is sub-station detection or main-station detection, it is necessary to obtain the sub-station measurement result. Before obtaining the sub-station measurement result, it is necessary to disconnect the current and voltage inputs of the broadband measurement device, and connect the current and voltage outputs of the broadband detection device to the current and voltage input ends of the broadband measurement device (voltage in parallel, current in series), so that the broadband measurement device uses the broadband detection device as the signal source. Establish communication connections between the broadband detection device and the broadband detection control device, and between the broadband detection control device and the broadband data processing device, and set the broadband detection control device as the analog main-station of the broadband data processing device, so that the broadband detection control device can receive the sub-station measurement result while the broadband data processing device sends the sub-station measurement result to the measurement main-station, and determine the detection result of the current sub-station based on the comparison result between the sub-station measurement result and the detected electrical signal (determined according to the detection parameters). For example, determine whether the broadband measurement device has the function of testing inter-harmonic signals according to whether the sub-station measurement result includes the inter-harmonic signal in the detected electrical signal, or calculate the relative error based on the sub-station measurement result and the detected electrical signal to judge the performance of the broadband measurement device. Among them, the sub-station detection result includes the sub-station basic function detection result and the sub-station basic performance detection result. Specifically, the sub-station basic function detection includes harmonic and inter-harmonic function detection, data recording function detection, waveform recording function detection, communication function detection, etc. The sub-station basic performance detection includes measurement accuracy detection, dynamic and static performance detection, low-frequency oscillation monitoring performance detection, sub-synchronous and super-synchronous oscillation monitoring performance detection, 100 - 300Hz broadband oscillation monitoring performance monitoring, time synchronization performance detection, dynamic and static performance detection, etc.

[0082] In an embodiment of the present invention, for further illustration and limitation, the remote detection control center determines the main-station detection result according to the sub-station measurement result of the global measurement sub-station, including:

[0083] The remote detection control center obtains the main-station monitoring result of the power grid monitored on the measurement main-station side;

[0084] Determine the master station detection result of the broadband measurement system based on the master station monitoring result and the sub-station measurement result of the global measurement sub-station.

[0085] In the embodiment of the present invention, during the master station detection process, as Figure 6 shown, establish a wireless connection between the broadband detection control device in each measurement sub-station and the remote detection control center to ensure that the broadband detection control device can receive the control instructions (carrying detection parameters) from the remote detection control center. After determining that the master station function detection can be started, each broadband detection device generates a detection electrical signal according to the corresponding sub-station detection parameters, and sends the detection electrical signal to the broadband measurement device according to the signal delay parameter to simulate the transmission state of the signal in the power grid. The broadband data processing device of each measurement sub-station will feedback the sub-station measurement result to the master station side for the master station side to analyze and obtain the master station measurement and monitoring result. For example, compare the dynamic data acquisition data in the master station measurement and monitoring result with the sub-station measurement result to detect the dynamic data acquisition function of the master station side; or compare the power grid operation dynamic monitoring result, analysis result, online disturbance identification result, etc. with the sub-station detection signals of each measurement sub-station to detect whether the corresponding functions of the master station side are effective, etc. Among them, the master station monitoring result includes the power grid operation dynamic monitoring result, the dynamic data acquisition function monitoring result, the analysis result obtained by analyzing based on the sub-station measurement result, etc.

[0086] The master station detection result includes the detection results of the power grid operation dynamic monitoring function, dynamic data acquisition function, online disturbance identification function and analysis function of the master station. Among them, the power grid operation dynamic monitoring function and dynamic data acquisition function of the broadband master station are realized by controlling each broadband detection device to output clock-synchronized steady-state three-phase current and three-phase voltage signals. The line disturbance identification result is realized by controlling each broadband detection device to simulate power grid disturbance situations such as line short circuit and open circuit. The detection of the analysis function is realized by controlling each broadband detection device to output low-frequency oscillation, sub-synchronous and super-synchronous oscillation, and broadband oscillation signals.

[0087] The present invention provides a detection method for a broadband measurement system. In the embodiment of the present invention, by obtaining the detection parameters for detecting the broadband measurement system; sending the detection parameters to the broadband detection device of the measurement sub-station where it is located, so that the broadband detection device sends a detection electrical signal that meets the detection parameters to at least one broadband measurement device of the measurement sub-station; determining the target detection result based on the measurement result of the obtained broadband measurement system, the target detection result includes at least one of the sub-station detection result and the master station detection result, which greatly reduces the detection time of the broadband measurement system, reduces the detection complexity, and at the same time, realizes the comprehensive detection of the sub-station and the master station in the broadband measurement system, thus greatly improving the detection efficiency of the broadband measurement system.

[0088] Further, as an implementation of the method shown above Figure 1 The embodiment of the present invention provides a detection system for a broadband measurement system, as Figure 7 shown. The system includes:

[0089] A broadband detection control device 31 and a broadband detection device 32, wherein the broadband detection control device 31 is communicatively connected to the broadband detection device 32 in the same measurement sub-station;

[0090] The broadband detection control device is configured to obtain detection parameters for detecting the broadband measurement system; send the detection parameters to the broadband detection device in the measurement sub-station where it is located; and determine a target detection result based on the measurement result of the broadband measurement system obtained, where the target detection result includes at least one of a sub-station detection result and a main-station detection result.

[0091] The broadband detection device is configured to send a detection electrical signal that meets the detection parameters to at least one broadband measurement device in the measurement sub-station.

[0092] Further, the system further includes a remote detection control center, and the remote detection control center is communicatively connected to the broadband detection control device;

[0093] The broadband detection control device is specifically configured to, in the case of main-station detection, obtain target joint detection parameters of the measurement sub-station where it is located from a multi-sub-station joint detection parameter set sent by the remote detection control center, where the multi-sub-station joint detection parameter set includes sub-station detection parameters and sub-station signal delay parameters corresponding to different measurement sub-stations; in the case of sub-station detection, obtain independent detection parameters that match the measurement device information of the measurement sub-station;

[0094] The remote detection control center is configured to send a multi-sub-station joint detection parameter set to the broadband detection control device.

[0095] Further, the broadband detection device is specifically configured to, in the case of main-station detection, generate a first detection electrical signal according to the sub-station detection parameters in the target joint detection parameters, and send the first detection electrical signal to the broadband measurement device according to the sub-station signal delay parameters; in the case of sub-station detection, generate a second detection electrical signal according to the independent detection parameters, and send the second detection electrical signal to the broadband measurement device.

[0096] Further, the broadband detection device is specifically configured to generate a clock synchronization digital signal based on the Beidou clock parameters and the independent detection parameters; generate an AC analog initial signal based on the clock synchronization digital signal; and obtain a second detection electrical signal by sequentially performing power amplification processing and signal feedback processing on the AC analog initial signal. The second detection electrical signal includes a broadband AC current signal and a broadband AC voltage signal, and the broadband AC current signal and the broadband AC voltage signal are synchronous output signals.

[0097] Further, the broadband detection control device is further configured to obtain the sub-station measurement results of the broadband measurement device from the broadband data processing device of the measurement sub-station;

[0098] Determine the sub-station detection results based on the comparison results between the sub-station measurement results and the detection electrical signal. The sub-station detection results include sub-station basic function detection results and sub-station basic performance detection results; and / or,

[0099] Send the sub-station measurement results to the remote detection control center, so that the remote detection control center determines the main-station detection results based on the sub-station measurement results of the global measurement sub-stations.

[0100] Further, the remote detection control center is further configured to obtain the main-station monitoring results of the power grid monitored by the measurement main-station side; determine the main-station detection results of the broadband measurement system based on the main-station monitoring results and the sub-station measurement results of the global measurement sub-stations. The main-station detection results include at least one of the detection results of the power grid operation dynamic monitoring function, dynamic data acquisition function, online disturbance identification function, and analysis function of the main-station.

[0101] The present invention provides a detection system for a broadband measurement system. In the embodiments of the present invention, detection parameters for detecting the broadband measurement system are obtained; the detection parameters are sent to the broadband detection device of the measurement sub-station where they are located, so that the broadband detection device sends a detection electrical signal that meets the detection parameters to at least one broadband measurement device of the measurement sub-station; and the target detection results are determined based on the measurement results of the broadband measurement system obtained. The target detection results include at least one of the sub-station detection results and the main-station detection results, which greatly reduces the detection time of the broadband measurement system, reduces the detection complexity, and at the same time, realizes a comprehensive detection of the sub-station and the main-station in the broadband measurement system, thereby greatly improving the detection efficiency of the broadband measurement system.

[0102] Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a sequence different from that here, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module for implementation. In this way, the present invention is not limited to any specific combination of hardware and software.

[0103] The foregoing is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A detection method for a broadband measurement system, characterized in that Including: Obtaining detection parameters for detecting a broadband measurement system; Sending the detection parameters to a broadband detection device of the measurement substation where it is located, so that the broadband detection device sends a detection electrical signal that meets the detection parameters to at least one broadband measurement device of the measurement substation. The detection electrical signals that the broadband detection device can generate include at least one of a three-phase alternating current signal, a voltage signal, an analog low-frequency oscillation signal, a subsynchronous oscillation signal, a supersynchronous oscillation signal, and a broadband oscillation signal synchronized with the second pulse of the positioning system. The broadband detection device includes a main control system, a Beidou clock synchronization module, a clock synchronization broadband signal source generation module, a voltage feedback loop, a broadband voltage high-speed power amplification module, a voltage output loop, a clock synchronization voltage acquisition module, a current feedback loop, a broadband current high-speed power amplification module, a current output loop, and a clock synchronization current acquisition module; Determining a target detection result based on the measurement result of the broadband measurement system obtained. The target detection result includes at least one of a substation detection result and a main station detection result. The main station detection result includes detection results of the power grid operation dynamic monitoring function, dynamic data acquisition function, online disturbance identification function, and analysis function of the main station; The detection includes main station detection and substation detection. Obtaining the detection parameters for detecting the broadband measurement system includes: In the case of main station detection, obtaining the target joint detection parameters of the measurement substation where it is located from the multi-substation joint detection parameter set sent from the remote detection control center. The multi-substation joint detection parameter set includes substation detection parameters corresponding to different measurement substations and substation signal delay parameters. The substation signal delay parameters are determined by performing oscillation simulation processing based on the detection item information and the layout information of the global measurement substations; In the case of substation detection, obtaining independent detection parameters matching the measurement device information of the measurement substation, generating a clock synchronization digital signal based on the Beidou clock parameters and the independent detection parameters; generating an AC analog initial signal based on the clock synchronization digital signal; obtaining a second detection electrical signal by sequentially performing power amplification processing and signal feedback processing on the AC analog initial signal, and sending the second detection electrical signal to the broadband measurement device. The second detection electrical signal includes a broadband alternating current signal and a broadband alternating voltage signal, and the broadband alternating current signal and the broadband alternating voltage signal are synchronous output signals; Among them, the basic function detection of the substation detection includes harmonic and interharmonic function detection, data recording function detection, waveform recording function detection, communication function detection, etc.; the basic performance detection of the substation detection includes measurement accuracy detection, dynamic and static performance detection, low-frequency oscillation monitoring performance detection, subsynchronous and supersynchronous oscillation monitoring performance detection; The broadband detection device is constructed based on a clock synchronization broadband signal source, broadband current and voltage amplification devices, and combines analog and digital secondary feedback mechanisms; The broadband voltage high-speed power amplification module is used to amplify a small voltage into an AC voltage signal in the range of 0 - 100V; the broadband current high-speed power amplification module is used to amplify a small current into an AC voltage signal in the range of 0 - 5A; the voltage feedback loop and the current feedback loop serve as the primary feedback for the broadband current and voltage high-speed power amplification modules; through high-precision sampling resistors and A / D sampling modules, rapid and accurate feedback measurements of current and voltage are achieved, and the results are fed back to the main control system to adjust the amplitudes of the output voltage and current and the synchronous phase; the current and voltage output loops are used to add a safety protection output function; the clock-synchronized broadband signal source generates digital current and voltage signals of a specified frequency according to the instructions of the main control system, converts them into analog voltage and current small signals through D / A, and after being amplified by the broadband current and voltage high-speed power amplification modules, is sampled by the clock-synchronized voltage and current acquisition module and undergoes secondary analog and digital feedback to achieve the synchronous output of broadband AC current signals and broadband AC voltage signals; Determining the target detection result based on the measurement result of the broadband measurement system obtained includes: Obtaining the sub-station measurement result of the broadband measurement device from the broadband data processing device of the measurement sub-station; Determining the sub-station detection result based on the comparison result between the sub-station measurement result and the detected electrical signal, where the sub-station detection result includes the sub-station basic function detection result and the sub-station basic performance detection result; and / or, Sending the sub-station measurement result to the remote detection control center so that the remote detection control center determines the main-station detection result based on the sub-station measurement results of the global measurement sub-stations; The main-station detection result at least includes one of the detection results of the power grid operation dynamic monitoring function, dynamic data acquisition function, online disturbance identification function, and analysis function of the main-station. The remote detection control center determines the main-station detection result based on the sub-station measurement results of the global measurement sub-stations, including: The remote detection control center obtains the main-station monitoring result of the power grid monitored on the main-station side; Based on the main-station monitoring result and the sub-station measurement results of the global measurement sub-stations, determining the main-station detection result of the broadband measurement system; The broadband measurement system includes a measurement main-station and measurement sub-stations; the measurement sub-stations include at least one broadband measurement device and a broadband data processing device; the measurement main-station does not include actual broadband measurement devices and broadband data processing devices, and is used to collect the broadband measurement results of each measurement sub-station and perform summary and analysis based on the measurement results of the global measurement sub-stations to achieve global monitoring of the power grid; The broadband data processing devices of each measurement sub-station will feed back the sub-station measurement results to the main-station side for the main-station side to analyze and obtain the main-station measurement and monitoring results; including but not limited to comparing the dynamic data acquisition data in the main-station measurement and monitoring results with the sub-station measurement results to detect the dynamic data acquisition function of the main-station side; or comparing the power grid operation dynamic monitoring results, analysis results, and online disturbance identification results with the sub-station detection signals of each measurement sub-station to detect whether the corresponding functions of the main-station side are effective.

2. A detection system for a broadband measurement system, characterized in that, Including: Broadband detection control device and broadband detection device, wherein the broadband detection control device is communicatively connected to the broadband detection device in the same measurement sub-station; The broadband detection control device is configured to obtain detection parameters for detecting a broadband measurement system; and send the detection parameters to the broadband detection device in the measurement sub-station where it is located. The detection electrical signals that the broadband detection device can generate include at least one of a three-phase alternating current signal, a voltage signal, an analog low-frequency oscillation signal, a subsynchronous oscillation signal, a supersynchronous oscillation signal, and a broadband oscillation signal synchronized with the second pulse of the positioning system. The broadband detection device includes a main control system, a Beidou clock synchronization module, a clock synchronization broadband signal source generation module, a voltage feedback loop, a broadband voltage high-speed power amplification module, a voltage output loop, a clock synchronization voltage acquisition module, a current feedback loop, a broadband current high-speed power amplification module, a current output loop, and a clock synchronization current acquisition module; Determine a target detection result based on the measurement result of the broadband measurement system obtained. The target detection result includes at least one of a sub-station detection result and a main-station detection result. The main-station detection result includes the detection results of the power grid operation dynamic monitoring function, the dynamic data acquisition function, the online disturbance identification function, and the analysis function of the main station; The broadband detection device is configured to send detection electrical signals that meet the detection parameters to at least one broadband measurement device in the measurement sub-station; The system further includes a remote detection control center, which is communicatively connected to the broadband detection control device; Specifically, in the case of main-station detection, the broadband detection control device is configured to obtain the target joint detection parameters of the measurement sub-station where it is located from the multi-sub-station joint detection parameter set sent by the remote detection control center. The multi-sub-station joint detection parameter set includes sub-station detection parameters corresponding to different measurement sub-stations and sub-station signal delay parameters, and the sub-station signal delay parameters are determined by performing oscillation simulation processing according to the detection project information and the layout information of the global measurement sub-stations; In the case of sub-station detection, obtain independent detection parameters that match the measurement device information of the measurement sub-station, generate a clock synchronization digital signal based on the Beidou clock parameters and the independent detection parameters; generate an AC analog initial signal based on the clock synchronization digital signal; obtain a second detection electrical signal by sequentially performing power amplification processing and signal feedback processing on the AC analog initial signal, and send the second detection electrical signal to the broadband measurement device. The second detection electrical signal includes a broadband alternating current signal and a broadband alternating voltage signal, and the broadband alternating current signal and the broadband alternating voltage signal are synchronous output signals; Among them, the basic function detection of the sub-station detection includes harmonic and inter-harmonic function detection, data recording function detection, waveform recording function detection, communication function detection, etc.; the basic performance detection of the sub-station detection includes measurement accuracy detection, dynamic and static performance detection, low-frequency oscillation monitoring performance detection, subsynchronous and supersynchronous oscillation monitoring performance detection; The remote detection control center is used to send a multi-substation joint detection parameter set to the broadband detection control device; The broadband detection device is constructed based on a clock-synchronized broadband signal source, broadband current and voltage amplification devices, and combines analog and digital secondary feedback mechanisms; The broadband voltage high-speed power amplification module is used to amplify a small voltage into an AC voltage signal in the range of 0 - 100V; the broadband current high-speed power amplification module is used to amplify a small current into an AC voltage signal in the range of 0 - 5A; the voltage feedback loop and the current feedback loop serve as the primary feedback for the broadband current and voltage high-speed power amplification modules; through high-precision sampling resistors and A / D sampling modules, fast and accurate feedback measurements of current and voltage are achieved, and the results are fed back to the main control system to adjust the amplitudes of the output voltage and current and the synchronization phase; the current and voltage output loops are used to add a safety protection output function; the clock-synchronized broadband signal source generates digital signals of current and voltage at a specified frequency according to the instructions of the main control system, converts them into analog voltage and current small signals through D / A, amplifies them by the broadband current and voltage high-speed power amplification modules, and then samples them through the clock-synchronized voltage and current acquisition module and performs analog and digital secondary feedback to achieve the synchronous output of broadband AC current signals and broadband AC voltage signals; Determining the target detection result based on the measurement result of the obtained broadband measurement system includes: Obtaining the sub-station measurement result of the broadband measurement device from the broadband data processing device of the measurement sub-station; Determining the sub-station detection result based on the comparison result between the sub-station measurement result and the detected electrical signal, where the sub-station detection result includes the sub-station basic function detection result and the sub-station basic performance detection result; and / or, Sending the sub-station measurement result to the remote detection control center so that the remote detection control center determines the main-station detection result based on the sub-station measurement results of the global measurement sub-stations; The main-station detection result includes at least one of the detection results of the power grid operation dynamic monitoring function, dynamic data acquisition function, online disturbance identification function, and analysis function of the main-station. The remote detection control center determines the main-station detection result based on the sub-station measurement results of the global measurement sub-stations, including: The remote detection control center obtains the main-station monitoring result of the power grid monitored on the main-station side; Determining the main-station detection result of the broadband measurement system based on the main-station monitoring result and the sub-station measurement results of the global measurement sub-stations; The broadband measurement system includes a measurement main-station and measurement sub-stations; the measurement sub-stations include at least one broadband measurement device and a broadband data processing device; the measurement main-station does not include actual broadband measurement devices and broadband data processing devices, and is used to collect the broadband measurement results of each measurement sub-station and perform summary and analysis based on the measurement results of the global measurement sub-stations to achieve global monitoring of the power grid; The broadband data processing devices of each measurement sub-station will feed back the sub-station measurement results to the master station side for the master station side to analyze and obtain the master station measurement and monitoring results; including but not limited to comparing the dynamic data acquisition data in the master station measurement and monitoring results with the sub-station measurement results to detect the dynamic data acquisition function of the master station side; or comparing the power grid operation dynamic monitoring results, analysis results, online disturbance identification results with the sub-station detection signals of each measurement sub-station to detect whether the corresponding functions of the master station side are effective.

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