Network-related test device for new energy station

Abstract

The invention discloses a network-related test device for a new energy station. The network-related test device is provided with a signal sampling unit, a signal output unit, a main control unit and an automatic analysis unit, the signal sampling unit is provided with an input side voltage channel, a voltage signal processing module, an input side current channel, a current signal processing module and a digital-to-analog conversion chip; the input side voltage channel and the voltage signal processing module are connected or disconnected through a switch, and the input side current channel and the current signal processing module are connected or disconnected through a switch; the signal output unit is provided with a frequency signal output channel, a frequency generator DAC, a voltage signal output channel and a voltage signal generator; the frequency signal output channel and the frequency generator DAC are connected or disconnected through a switch, and the voltage signal output channel and the voltage signal generator are connected or disconnected through a switch. And the main control unit is connected with the automatic analysis unit. The system is high in sampling precision, convenient in wiring, simple in operation, high in integration level, and high in automation test degree.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy station testing solutions, and in particular to a new energy station network-related testing device and a testing method thereof. Background Art

[0002] A new energy station is a collection of all equipment below the grid connection point of a wind farm or solar power station that is centrally connected to the power system, including transformers, busbars, lines, converters, energy storage, wind turbines, photovoltaic power generation equipment, reactive power regulation equipment and auxiliary equipment.

[0003] With the increasing shortage of energy, a large number of new energy sources have been gradually applied to the operation of the power grid, and the scale of new energy integration into the power grid is increasing. The grid-related performance test of new energy stations is not only conducive to the safe and stable operation of my country's power system, but also has important significance for improving the accuracy of relay protection work in new energy grid-related systems. It is conducive to the safe and reliable operation of large-scale new energy power grids, helps to improve the safety guarantee capability of new energy, and also has very significant value in improving the utilization efficiency of new energy.

[0004] The existing testing scheme for new energy stations requires a data acquisition instrument, a frequency signal generator, and a voltage signal generator. When testing a new energy station for a frequency modulation / inertia response test, three devices need to be operated separately. The operation is complicated and cumbersome, and the consistency of equipment data acquisition / output cannot be guaranteed. This greatly reduces work efficiency and test accuracy. In addition, the data needs to be analyzed manually, and automatic analysis, automatic testing, and automatic judgment cannot be achieved. When testing high / low voltage ride-through and continuous fault ride-through on site, the data acquisition device cannot automatically analyze and judge the data according to the corresponding test standards. When testing power quality on site, the data acquisition device cannot automatically analyze and judge the data according to the corresponding test standards. During on-site AVG / AVC (active power / reactive power) testing, the data acquisition device cannot automatically analyze and judge the data according to the corresponding test standards.

[0005] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide a new energy station network-related testing device and a testing method thereof to overcome the shortcomings of the existing technology. Summary of the invention

[0006] The purpose of the present invention is to avoid the shortcomings of the prior art and provide a new energy station network-related testing device and a testing method thereof, which has high sampling accuracy, convenient wiring, simple operation, high integration, and high degree of automated testing, and can effectively save testing time and improve testing efficiency.

[0007] The purpose of the present invention is achieved through the following technical measures.

[0008] Provided is a network-related test device for a new energy station, which is provided with a signal sampling unit, a signal output unit, a main control unit and an automatic analysis unit;

[0009] The signal sampling unit is provided with an input side voltage channel, a voltage signal processing module, an input side current channel, a current signal processing module and a digital-to-analog conversion chip; the input side voltage channel and the voltage signal processing module are connected or disconnected by a switch, the input side current channel and the current signal processing module are connected or disconnected by a switch, the power signal processing module and the current signal processing module are both connected to the digital-to-analog conversion chip, and the digital-to-analog conversion chip is connected to the main control unit;

[0010] The signal output unit is provided with a frequency signal output channel, a frequency generator DAC, a voltage signal output channel, and a voltage signal generator; the frequency signal output channel and the frequency generator DAC are connected or disconnected through a switch, and the voltage signal output channel and the voltage signal generator are connected or disconnected through a switch; the frequency generator DAC and the voltage generator are both connected to the main control unit;

[0011] The main control unit is connected with the automatic analysis unit.

[0012] Preferably, the digital-to-analog conversion chip of the above-mentioned new energy station network-related testing device can be a chip of model AD7606.

[0013] Preferably, in the above-mentioned new energy station network-related testing device, when the switch between the input side voltage channel and the voltage signal processing module is connected, the voltage signal collected through the input side voltage channel enters the voltage signal processing module, and the voltage signal processing module filters the voltage signal to remove noise and obtain a clean and stable voltage signal.

[0014] When the switch between the input side current channel and the current signal processing module is connected, the current signal collected through the input side current channel enters the current signal processing module, and the current signal processing module filters the current signal to remove clutter and obtain a clean and stable current signal.

[0015] The digital-to-analog conversion chip converts the input voltage and current signals from digital signals into analog signals, and inputs them to the main control unit, which then inputs them to the automatic analysis unit for analysis.

[0016] Preferably, in the above-mentioned new energy station network-related testing device, when the switch between the frequency signal output channel and the frequency generator DAC is connected, the main control unit inputs the detection frequency parameter into the frequency generator DAC, and the frequency generated by the frequency generator DAC is input into the frequency signal output channel.

[0017] When the switch between the voltage signal output channel and the voltage signal generator is connected, the main control unit inputs the detection voltage parameter into the voltage signal generator, and the voltage generated by the voltage signal generator is input into the voltage signal output channel.

[0018] The new energy station network-related testing device has an automatic analysis unit that performs automatic analysis and judgment and generates a test report.

[0019] Preferably, the above-mentioned new energy station network-related test device performs a frequency modulation / inertia response test through the following steps:

[0020] S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively;

[0021] S2, set the sampling loop wiring mode;

[0022] S3, set the analog signal output value;

[0023] S4, start the test;

[0024] S5, the sampling circuit performs data acquisition and outputs analog signals until the data acquisition is completed and the analog signal output is completed;

[0025] S6, repeat S2 to S5 to complete the test of all frequency test points;

[0026] S7, repeat S2 to S6 to complete all test items;

[0027] S8, automatically analyzes and determines, and generates a test report.

[0028] Preferably, the above-mentioned new energy station network-related testing device performs power quality testing through the following steps:

[0029] S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively;

[0030] S2, set the sampling loop wiring mode;

[0031] S3, set the sampling time of the network-related test device of the new energy station;

[0032] S4, start the test;

[0033] S5, the sampling loop performs data collection until the data collection is completed;

[0034] S6, repeat S3 to S5 to complete the test of all test points;

[0035] S7, automatically analyzes and determines, and generates test reports.

[0036] Preferably, the above-mentioned new energy station network-related test device performs high and low voltage ride-through and continuous fault ride-through tests through the following steps:

[0037] S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively;

[0038] S2, set the sampling loop wiring mode;

[0039] S3, set the analog signal output value;

[0040] S4, start the test;

[0041] S5, the sampling circuit performs data acquisition and outputs analog signals until the data acquisition is completed and the analog signal output is completed;

[0042] S6, repeat S2 to S5 to complete the test of all voltage test points;

[0043] S7, repeat S2 to S6 to complete all test items;

[0044] S8, automatically analyzes and determines, and generates a test report.

[0045] The network-related test device for new energy stations of the present invention integrates functions such as acquisition channels, analog signal output channels, main control units, automatic analysis, and automatic report export. It can complete the network-related performance test of new energy stations at one time, has high sampling accuracy, convenient wiring, simple operation, high integration, and high degree of automated testing, can effectively save test time, improve test efficiency, reduce manual analysis errors through automatic analysis, fundamentally solve the problem of misjudgment and missed judgment of test items, and enhance the standardization of tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0047] Figure 1 It is a schematic diagram of a network-related testing device for a new energy station of the present invention.

[0048] Figure 2 It is a test principle diagram of a network-related test device for a new energy station of the present invention.

[0049] Figure 3 It is a flow chart of a frequency modulation / inertia response test performed by the network-related test device of the new energy station of the present invention.

[0050] Figure 4 It is a flow chart of the power quality test performed by the network-related test device of the new energy station of the present invention.

[0051] Figure 5 It is a flow chart of the new energy station network-related testing device of the present invention performing high and low voltage ride-through and continuous fault ride-through. DETAILED DESCRIPTION

[0052] The present invention will be further described with reference to the following examples.

[0053] A network-related testing device for a new energy station, such as Figure 1 As shown, a signal sampling unit, a signal output unit, a main control unit and an automatic analysis unit are provided.

[0054] The signal sampling unit is provided with an input side voltage channel, a voltage signal processing module, an input side current channel, a current signal processing module and a digital-to-analog conversion chip; the input side voltage channel and the voltage signal processing module are connected or disconnected through a switch, the input side current channel and the current signal processing module are connected or disconnected through a switch, the power signal processing module and the current signal processing module are both connected to the digital-to-analog conversion chip, and the digital-to-analog conversion chip is connected to the main control unit.

[0055] The signal output unit is provided with a frequency signal output channel, a frequency generator DAC, a voltage signal output channel, and a voltage signal generator; the frequency signal output channel and the frequency generator DAC are connected or disconnected through a switch, and the voltage signal output channel and the voltage signal generator are connected or disconnected through a switch; the frequency generator DAC and the voltage generator are both connected to the main control unit.

[0056] The main control unit is connected with the automatic analysis unit.

[0057] The wiring schematic diagram of the network-related test device for new energy stations to test new energy stations is as follows: Figure 2 The working process of the network-related test device of the new energy station involves two processes: one is the process of the host computer controlling the processor to set the detection parameters; the other is the process of collecting and processing the detection signal.

[0058] In the new energy station network-related testing device, when the switch between the input side voltage channel and the voltage signal processing module is connected, the voltage signal collected through the input side voltage channel enters the voltage signal processing module, and the voltage signal processing module filters the voltage signal to remove clutter and obtain a clean and stable voltage signal.

[0059] When the switch between the input side current channel and the current signal processing module is connected, the current signal collected through the input side current channel enters the current signal processing module, and the current signal processing module filters the current signal to remove clutter and obtain a clean and stable current signal.

[0060] The digital-to-analog conversion chip converts the input voltage and current signals from digital signals into analog signals, and inputs them into the main control unit, which then inputs them into the automatic analysis unit for analysis. The digital-to-analog conversion chip may be a chip of model AD7606.

[0061] In the new energy station network-related testing device, when the switch between the frequency signal output channel and the frequency generator DAC is connected, the main control unit inputs the detection frequency parameter into the frequency generator DAC, and the frequency generated by the frequency generator DAC is input into the frequency signal output channel.

[0062] When the switch between the voltage signal output channel and the voltage signal generator is connected, the main control unit inputs the detection voltage parameter into the voltage signal generator, and the voltage generated by the voltage signal generator is input into the voltage signal output channel.

[0063] The new energy station network-related testing device has an automatic analysis unit that performs automatic analysis and judgment and generates a test report.

[0064] The network-related test device for new energy stations of the present invention can automatically test, analyze and judge the primary frequency modulation, inertia response, high / low voltage ride-through, continuous fault ride-through and power quality (current / voltage harmonics, current / voltage interharmonics, DC component, voltage deviation, frequency deviation, three-phase unbalance, flicker), AVG / AVC (active power / reactive power) and other items of wind power, photovoltaic and energy storage power stations. It can meet the network-related test standards such as GB / T 34120-2023, GB / T 36547-2024 and GB / T 19964-2024.

[0065] like Figure 3 As shown, the new energy station network-related test device performs a frequency modulation / inertia response test through the following steps:

[0066] S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively;

[0067] S2, set the sampling loop wiring mode;

[0068] S3, set the analog signal output value;

[0069] S4, start the test;

[0070] S5, the sampling circuit performs data acquisition and outputs analog signals until the data acquisition is completed and the analog signal output is completed;

[0071] S6, repeat S2 to S5 to complete the test of all frequency test points;

[0072] S7, repeat S2 to S6 to complete all test items;

[0073] S8, automatically analyzes and determines, and generates a test report.

[0074] like Figure 4 As shown, the network-related test device of the new energy station performs power quality testing through the following steps:

[0075] S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively;

[0076] S2, set the sampling loop wiring mode;

[0077] S3, set the sampling time of the network-related test device of the new energy station;

[0078] S4, start the test;

[0079] S5, the sampling loop performs data collection until the data collection is completed;

[0080] S6, repeat S3 to S5 to complete the test of all test points;

[0081] S7, automatically analyzes and determines, and generates test reports.

[0082] like Figure 5 As shown, the network-related test device of the new energy station performs high and low voltage ride-through and continuous fault ride-through tests through the following steps:

[0083] S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively;

[0084] S2, set the sampling loop wiring mode;

[0085] S3, set the analog signal output value;

[0086] S4, start the test;

[0087] S5, the sampling circuit performs data acquisition and outputs analog signals until the data acquisition is completed and the analog signal output is completed;

[0088] S6, repeat S2 to S5 to complete the test of all voltage test points;

[0089] S7, repeat S2 to S6 to complete all test items;

[0090] S8, automatically analyzes and determines, and generates a test report.

[0091] The network-related test device for new energy stations of the present invention integrates functions such as acquisition channels, analog signal output channels, main control units, automatic analysis, and automatic report export. It can complete the network-related performance test of new energy stations at one time, has high sampling accuracy, convenient wiring, simple operation, high integration, and high degree of automated testing, can effectively save test time, improve test efficiency, reduce manual analysis errors through automatic analysis, fundamentally solve the problem of misjudgment and missed judgment of test items, and enhance the standardization of tests.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A network-related testing device for a new energy station, characterized in that: A signal sampling unit, a signal output unit, a main control unit and an automatic analysis unit are provided; The signal sampling unit is provided with an input side voltage channel, a voltage signal processing module, an input side current channel, a current signal processing module and a digital-to-analog conversion chip; the input side voltage channel and the voltage signal processing module are connected or disconnected by a switch, the input side current channel and the current signal processing module are connected or disconnected by a switch, the power signal processing module and the current signal processing module are both connected to the digital-to-analog conversion chip, and the digital-to-analog conversion chip is connected to the main control unit; The signal output unit is provided with a frequency signal output channel, a frequency generator DAC, a voltage signal output channel, and a voltage signal generator; the frequency signal output channel and the frequency generator DAC are connected or disconnected through a switch, and the voltage signal output channel and the voltage signal generator are connected or disconnected through a switch; the frequency generator DAC and the voltage generator are both connected to the main control unit; The main control unit is connected with the automatic analysis unit.

2. The network-related testing device for new energy stations according to claim 1 is characterized in that: The digital-to-analog conversion chip is AD7606.

3. The network-related testing device for new energy stations according to claim 2 is characterized in that: The switch between the input side voltage channel and the voltage signal processing module is connected, and the voltage signal collected through the input side voltage channel enters the voltage signal processing module. The voltage signal processing module filters the voltage signal to remove clutter and obtain a clean and stable voltage signal; The switch between the input side current channel and the current signal processing module is connected, and the current signal collected by the input side current channel enters the current signal processing module. The current signal processing module filters the current signal to remove clutter and obtain a clean and stable current signal; The digital-to-analog conversion chip converts the input voltage and current signals from digital signals into analog signals, and inputs them to the main control unit, which then inputs them to the automatic analysis unit for analysis.

4. The network-related testing device for new energy stations according to claim 3 is characterized in that: The switch between the frequency signal output channel and the frequency generator DAC is connected, the main control unit inputs the detection frequency parameter into the frequency generator DAC, and the frequency generated by the frequency generator DAC is input into the frequency signal output channel; The switch between the voltage signal output channel and the voltage signal generator is connected, the main control unit inputs the detection voltage parameter into the voltage signal generator, and the voltage generated by the voltage signal generator is input into the voltage signal output channel.

5. The network-related testing device for new energy stations according to claim 4 is characterized in that: The automatic analysis unit performs automatic analysis and determination and generates a test report.

6. The network-related testing device for a new energy station according to any one of claims 1 to 5, characterized in that: Perform a frequency modulation / inertia response test by following the steps below: S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively; S2, set the sampling loop wiring mode; S3, set the analog signal output value; S4, start the test; S5, the sampling circuit performs data acquisition and outputs analog signals until data acquisition is completed and analog signal output is completed; S6, repeat S2 to S5 to complete the test of all frequency test points; S7, repeat S2 to S6 to complete all test items; S8, automatically analyzes and determines, and generates a test report.

7. The network-related testing device for a new energy station according to any one of claims 1 to 5, characterized in that: Perform power quality testing by following these steps: S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively; S2, set the sampling loop wiring mode; S3, set the sampling time of the network-related test device of the new energy station; S4, start the test; S5, the sampling loop performs data collection until the data collection is completed; S6, repeat S3 to S5 to complete the test of all test points; S7, automatically analyzes and determines, and generates test reports.

8. The network-related testing device for a new energy station according to any one of claims 1 to 5, characterized in that: Perform high and low voltage ride-through and continuous fault ride-through tests by following the steps below: S1, the sampling circuit and signal output circuit of the network-related test device of the new energy station are connected to the station measurement and control screen and the primary frequency modulation screen respectively; S2, set the sampling loop wiring mode; S3, set the analog signal output value; S4, start the test; S5, the sampling circuit performs data acquisition and outputs analog signals until data acquisition is completed and analog signal output is completed; S6, repeat S2 to S5 to complete the test of all voltage test points; S7, repeat S2 to S6 to complete all test items; S8, automatically analyzes and determines, and generates a test report.

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