RTDS hardware access signal adaptation device

Abstract

The utility model relates to the field of signal configuration devices, in particular to an RTDS hardware access signal adapter. According to the device, a resistance board voltage divider comprises a series circuit formed by connecting a plurality of resistor elements with different resistance value grades in series, a switch is arranged in front of each resistor element, and the switch action is controlled by a switch signal of a control circuit; the series circuit is connected in parallel with a 5000ohm large resistor; the controller comprises a control circuit and calculation software, and the control circuit outputs a corresponding 0 / 1 signal according to a result obtained by an embedded algorithm of the calculation software; the calculation software receives an electrical quantity amplitude A of to-be-accessed RTDS hardware and an expected signal amplitude B, calculates an adaptive proportionality coefficient K and the access quantity of different levels of resistor elements, converts the access quantity into a binary system, and respectively inputs the binary system into a control circuit in a 0 / 1 signal form; the input and output equipment comprises a human-computer interaction interface and a signal input and output interface, the controller interacts with external equipment through the input and output interface, and the controller interacts with personnel through the human-computer interaction interface. The device is convenient to configure and is suitable for different voltage ranges.

Description

Technical Field

[0001] The utility model relates to the field of signal configuration devices, in particular to an RTDS hardware access signal adapter device. Background Art

[0002] Developed and produced by RTDS, a company within the Manitoba DC Research Center in Canada, RTDS is a real-time digital simulation system that utilizes multi-CPU parallel processing technology and the EMTP model to fully digitally simulate electromagnetic transient processes in power systems. Its software and hardware are designed specifically for real-time simulation of power systems, offering high simulation accuracy and a real-time simulation step size of up to 50μs. It is easy to model, unrestricted by system size, complexity, or duration, offering flexible configuration and strong repeatability. The system can also be connected to hardware to establish a hybrid digital-analog platform for closed-loop real-time simulation testing. RTDS already has dozens of users in China, including major universities, research institutes, and power suppliers. Using RTDS to build a digital-physical hybrid simulation platform can provide a reliable research method for the design and operation of power systems.

[0003] The most significant feature of RTDS is its ability to connect to physical electrical equipment for hardware-in-the-loop simulation. Therefore, RTDS devices must accept signals from external electrical devices. This connection is achieved using a specially designed GTAI board with an input range of ±10V. However, the signal ranges of the external hardware devices that require RTDS for hardware-in-the-loop simulation vary widely, often exceeding this limit. For example, the excitation voltage output by the excitation control cabinet of a nuclear power plant generator can reach several hundred volts, necessitating adjustments to the input signal to accommodate the RTDS board's limits. As the connected external hardware device changes, its electrical range also changes. Therefore, a signal adapter is required to adjust the signal ratio based on the electrical range of the external hardware device to accommodate the GTAI limitations.

[0004] Currently, the signal adapter has the following problems:

[0005] RTDS devices lack supporting signal adapters. In practice, users must configure their own. Typically, a voltage divider is created based on the signal requirements using a voltage divider circuit, a cumbersome process. Furthermore, the devices connected to RTDS and their signal amplitudes vary widely, so a voltage divider designed for one device cannot meet the needs of other devices, resulting in poor adaptability. Utility Model Content

[0006] The technical problem to be solved by the utility model is: to provide an RTDS hardware access signal adapter device which is convenient to configure and applicable to different voltage ranges.

[0007] The utility model provides an RTDS hardware access signal adapter device, comprising: a resistor plate voltage divider, a controller and input and output devices;

[0008] The resistor plate voltage divider includes a series circuit formed by connecting several resistor elements of different resistance values ​​in series. A switch is set in front of each resistor element, and the switch action is controlled by the switch signal of the control circuit; the switch controls whether the resistor element is connected or not;

[0009] The series circuit is connected in parallel with a large resistor of 5000Ω;

[0010] The controller includes a control circuit and calculation software. The control circuit outputs a corresponding 0 / 1 signal according to the result obtained by the algorithm embedded in the calculation software. When the output signal is 0, the switch in front of the corresponding resistor element is connected to the short-circuit path in parallel with the resistor element; when the output signal is 1, the switch in front of the corresponding resistor connects the resistor element to the circuit.

[0011] The controller adjusts the voltage division ratio by controlling whether the resistance element is connected or not;

[0012] The calculation software receives the electrical quantity amplitude A of the RTDS hardware to be connected and the expected signal amplitude B, calculates the adapted proportional coefficient K and the connected quantity of the resistance elements of different levels, and then converts the connected quantity into binary and inputs it into the control circuit in the form of 0 / 1 signals;

[0013] The input and output devices include a human-computer interaction interface and a signal input and output interface. The controller interacts with external devices through the input and output interface, and the controller interacts with personnel through the human-computer interaction interface.

[0014] In a specific embodiment of the present invention, the resistor plate voltage divider includes resistor elements with five resistance levels, namely 1Ω, 2Ω, 5Ω, 10Ω and 20Ω.

[0015] In a specific embodiment of the present invention, each level of resistance element has 8 to 15 pure resistors connected in series.

[0016] In a specific embodiment of the present invention, each level of resistance element has 10 pure resistors connected in series.

[0017] In a specific embodiment of the present invention, the calculation formula of the proportional coefficient K is:

[0018] K = total series resistance / (A / B).

[0019] In a specific embodiment of the present invention, the method for calculating the connection amount of the resistance elements of different levels is as follows:

[0020] k 20=K / 20; (1)

[0021] k 10 =(K-20×k 20 ) / 10; (2)

[0022] k5=(K-20×k 20 -10×k 10 ) / 5; (3)

[0023] k2=(K-20×k 20 -10×k 10 -5×k5) / 2; (4)

[0024] k1=K-20×k 20 -10×k 10 -5×k5-2×k2 (5)

[0025] Among them, k20 represents the number of 20Ω resistors connected, k10 represents the number of 10Ω resistors connected, k5 represents the number of 5Ω resistors connected, k2 represents the number of 2Ω resistors connected, and k1 represents the number of 1Ω resistors connected.

[0026] In a specific embodiment of the present invention, a power supply is further included, and the power supply supplies power to the entire device.

[0027] In a specific embodiment of the present invention, the human-computer interaction interface includes two displays, a numeric keyboard and a confirmation and return button.

[0028] A display shows the electrical quantity amplitude A of the RTDS access hardware and the expected signal amplitude B;

[0029] Another display shows the actual signal value obtained after being converted by the signal adaptation device.

[0030] In a specific implementation of the present invention, the input and output interfaces are connected to actual electrical signals.

[0031] Compared to existing technologies, the present invention's RTDS hardware access signal adapter device includes a resistor plate voltage divider, a controller, and input / output devices. The controller automatically calculates the resistor access method of the resistor plate voltage divider based on input parameters and adjusts the input signal to match the RTDS hardware result requirements. The present invention's signal adapter automatically constructs a voltage divider circuit and automatically adjusts the varying voltage signals connected to the RTDS device to a voltage compatible with the RTDS, significantly improving experimental operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1A front view of an RTDS signal adapter device according to an embodiment of the present utility model is shown;

[0033] Figure 2 A rear view of an RTDS signal adapter device according to an embodiment of the present utility model is shown;

[0034] Figure 3 1. A top view of the interior of an RTDS signal adapter device according to an embodiment of the present invention;

[0035] Figure 4 represents a schematic diagram of a resistor plate voltage divider;

[0036] In the figure, 1-human-computer interaction interface, 2-operation button, 3-input and output interface, 4-device power interface, 5-resistance plate voltage divider, 6-control circuit, 7-calculation software. DETAILED DESCRIPTION

[0037] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0038] The embodiment of the utility model discloses an RTDS hardware access signal adapter device, such as Figures 1 to 3 The device shown includes: a resistor plate voltage divider 5, a controller and input and output devices;

[0039] The resistor plate voltage divider 5 is used to achieve voltage adaptation. Under the premise of ensuring voltage matching, considering the current of the connected hardware device, a resistor that can withstand high power is selected to make a signal adaptation device, and pure resistance is used as the basic element of signal conversion;

[0040] like Figure 4 As shown, the resistor plate voltage divider 5 includes a series circuit formed by a plurality of resistor elements of different resistance values ​​connected in series. A switch is provided before each resistor element, and the switch action is controlled by a switch signal of the control circuit; the switch controls whether the resistor element is connected or not;

[0041] Each level of resistance elements has 8 to 15 pure resistors connected in series, preferably 10 pure resistors connected in series.

[0042] The series circuit is connected in parallel with a large resistor of 5000Ω to shunt the current so as to prevent the voltage divider resistor from burning out due to excessive current;

[0043] The controller is used to determine the configuration of the resistors on the circuit board according to the input voltage signal;

[0044] The controller includes a control circuit 6 and a calculation software 7. The control circuit 6 outputs a corresponding 0 / 1 signal according to the result obtained by the algorithm embedded in the calculation software 7. When the output signal is 0, the switch in front of the corresponding resistor element is connected to the short-circuit path in parallel with the resistor element; when the output signal is 1, the switch in front of the corresponding resistor connects the resistor element to the circuit.

[0045] The controller adjusts the voltage division ratio by controlling whether the resistance element is connected or not;

[0046] The calculation software 7 receives the electrical quantity amplitude A of the RTDS hardware to be connected and the expected signal amplitude B, calculates the adaptive proportional coefficient K and the access quantity of the resistance elements of different levels, and then converts the access quantity into binary and inputs it into the control circuit in the form of 0 / 1 signals;

[0047] The calculation formula of the proportional coefficient K is:

[0048] K = total series resistance / (A / B).

[0049] The input / output device is a human-machine interface 1 and a signal input / output interface 3, which are installed after the resistor plate voltage divider 5, control circuit 6, and control software 7 are packaged. The human-machine interface includes operation buttons 2 and two displays. The operation buttons 2 include a numeric keypad and a confirmation / return button. One display shows the electrical quantity amplitude A and the expected signal amplitude B of the RTDS access hardware, and the other display shows the actual signal value obtained after conversion by the signal adapter. The input / output interface 3 is connected to the actual electrical signal.

[0050] The controller interacts with external devices through the input and output interface 3 and interacts with personnel through the human-computer interaction interface 1.

[0051] The device also includes a power supply, which supplies power to the entire device. The power supply supplies power to the entire device through the device power interface 4, including powering the controller and the human-machine interface.

[0052] The operating principle and usage flow of this utility model are as follows: Connect the power supply, turn on the switch, connect the external hardware signal, and output the device signal to the RTDS board. The rated value of the external hardware device signal and the desired output signal value are determined, and two data are input through the operation button. The input data is calculated by the calculation software to adapt the transformation ratio, and the required number of each type of resistor is output in binary form. This signal is then transmitted to the control circuit. The control circuit receives the control signal, drives the switches of the resistors in the resistor board, and generates a suitable voltage divider circuit, which then outputs the voltage after the voltage divider circuit.

[0053] In order to further understand the present invention, the RTDS hardware access signal adapter provided by the present invention is described in detail below in conjunction with the embodiments. The protection scope of the present invention is not limited by the following embodiments.

[0054] Example 1

[0055] The resistor plate voltage divider consists of five resistor elements of different resistance levels connected in series to form a series circuit.

[0056] The five resistance elements of different resistance values ​​are pure resistors of 1Ω, 2Ω, 5Ω, 10Ω, and 20Ω, respectively. Each level has 10 equal-value resistors connected in series, ultimately forming a series circuit of 1Ω×10+2Ω×10+5Ω×10+10Ω×10+20Ω×10=380Ω.

[0057] A switch is set in front of each resistor element, and the switch action is controlled by the switch signal of the control circuit; the switch controls whether the resistor element is connected or not;

[0058] The series circuit is connected in parallel with a large resistor of 5000Ω;

[0059] The controller is connected to the resistor board voltage divider. The control circuit outputs a corresponding 0 / 1 signal based on the results of the algorithm embedded in the control software. When the output signal is 0, the switch in front of the corresponding resistor is connected to the short-circuit path in parallel with the resistor element. When the output signal is 1, the switch in front of the corresponding resistor connects the resistor to the circuit. The controller adjusts the voltage divider ratio by controlling whether the resistor element is connected or not. The embedded control software uses integer division as the basic control algorithm. Based on the user-entered electrical quantity amplitude A connected to the RTDS hardware and the expected signal amplitude B, the adaptive scaling factor K = 380 / (A / B) is calculated, with decimal points rounded off. Considering that the devices actually connected to the RTDS are mostly secondary devices, the excitation voltage output by the excitation control cabinet is used as a reference, and appropriate margin is added to establish the input limit range of the adapter to ±3.8kV. According to formula (1) to formula (5), the number of resistor connections of 5 levels is determined by rounding off. Among them, k20 represents the number of 20Ω resistors connected, k10 represents the number of 10Ω resistors connected, k5 represents the number of 5Ω resistors connected, k2 represents the number of 2Ω resistors connected, and k1 represents the number of 1Ω resistors connected. The values ​​are converted into binary and input into the control circuit of the resistor board in the form of 0 / 1 signals.

[0060] k 20 =K / 20; (1)

[0061] k 10 =(K-20×k 20 ) / 10; (2)

[0062] k5=(K-20×k 20 -10×k 10 ) / 5; (3)

[0063] k2=(K-20×k 20 -10×k 10 -5×k5) / 2; (4)

[0064] k1=K-20×k 20 -10×k 10 -5×k5-2×k2 (5)

[0065] The input and output devices include a human-computer interaction interface and a signal input and output interface;

[0066] The human-computer interaction interface includes two displays, a numeric keyboard and a confirmation return button, and one display shows the electrical quantity amplitude A of the RTDS access hardware and the expected signal amplitude B;

[0067] Another display shows the actual signal value obtained after being converted by the signal adaptation device.

[0068] The controller interacts with external devices through input and output interfaces.

[0069] The above embodiments are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0070] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An RTDS hardware access signal adapter device, characterized in that: include: Resistive plate voltage dividers, controllers, and input-output devices; The resistor plate voltage divider includes a series circuit formed by connecting several resistor elements of different resistance values ​​in series. A switch is set in front of each resistor element, and the switch action is controlled by the switch signal of the control circuit; the switch controls whether the resistor element is connected or not; The series circuit is connected in parallel with a large resistor of 5000Ω; The controller includes a control circuit and calculation software. The control circuit outputs a corresponding 0 / 1 signal according to the result obtained by the algorithm embedded in the calculation software. When the output signal is 0, the switch in front of the corresponding resistor element is connected to the short-circuit path in parallel with the resistor element; when the output signal is 1, the switch in front of the corresponding resistor connects the resistor element to the circuit. The controller adjusts the voltage division ratio by controlling whether the resistance element is connected or not; The calculation software receives the electrical quantity amplitude A of the RTDS hardware to be connected and the expected signal amplitude B, calculates the adapted proportional coefficient K and the connected quantity of the resistance elements of different levels, and then converts the connected quantity into binary and inputs it into the control circuit in the form of 0 / 1 signals; The input and output devices include a human-computer interaction interface and a signal input and output interface. The controller interacts with external devices through the input and output interface, and the controller interacts with personnel through the human-computer interaction interface.

2. The RTDS hardware access signal adapter according to claim 1, characterized in that: The resistor plate voltage divider includes resistor elements with five resistance levels, namely 1Ω, 2Ω, 5Ω, 10Ω and 20Ω.

3. The RTDS hardware access signal adapter according to claim 2, characterized in that: Each of the mentioned grades of resistance elements has 8 to 15 pure resistors connected in series.

4. The RTDS hardware access signal adapter according to claim 3, characterized in that: Each resistor element of said grade has 10 pure resistors connected in series.

5. The RTDS hardware access signal adapter device according to claim 4, characterized in that: The calculation formula of the proportional coefficient K is: K = total series resistance / (A / B).

6. The RTDS hardware access signal adapter device according to claim 5, characterized in that: The calculation method for the connection amount of the resistance elements of different levels is as follows: k 20 =K / 20; (1) k 10 =(K-20×k 20 ) / 10; (2) k5=(K-20×k 20 -10×k 10 ) / 5; (3) k2=(K-20×k 20 -10×k 10 -5×k5) / 2; (4) k1=K-20×k 20 -10×k 10 -5×k5-2×k2 (5) Among them, k20 represents the number of 20Ω resistors connected, k10 represents the number of 10Ω resistors connected, k5 represents the number of 5Ω resistors connected, k2 represents the number of 2Ω resistors connected, and k1 represents the number of 1Ω resistors connected.

7. The RTDS hardware access signal adapter according to claim 1, characterized in that: Also included is a power supply, which supplies power to the entire device.

8. The RTDS hardware access signal adapter according to claim 1, characterized in that: The human-computer interaction interface includes two displays, a numeric keyboard and a confirmation and return button. A display shows the electrical quantity amplitude A of the RTDS access hardware and the expected signal amplitude B; Another display shows the actual signal value obtained after being converted by the signal adaptation device.

9. The RTDS hardware access signal adapter according to claim 1, characterized in that: The input and output interfaces are connected to actual electrical signals.

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