Improved ignition pulse trigger optimization method of real-time simulation system and related device

Abstract

The invention discloses an improved ignition pulse trigger optimization method of a real-time simulation system and a related device, and the method comprises the steps: calculating the pulse division of a trigger pulse according to the arrival time when the trigger pulse transmitted by an external controller is received, and then carrying out the calculation of the pulse division of the trigger pulse in a next simulation step length after the trigger pulse is received; the reverse voltage source of the voltage calculated according to the voltage calculation formula of the reverse voltage source provided by the invention is connected in series on the conduction resistor of the converter valve, and the voltage of the reverse voltage source is set to be zero when the next simulation step length is finished, so that the forward voltage of the converter valve is reduced in a controlled manner, and the simulation step length of the converter valve is reduced. Therefore, errors caused by the randomness of the pulse receiving time are reduced. The technical problem that an existing converter valve ignition pulse algorithm is triggered when a new simulation step is started, and consequently the voltage simulation result of the converter valve is inaccurate is solved.

Description

Technical Field

[0001] The invention relates to the technical field of power system simulation, and in particular to an improved ignition pulse trigger optimization method and related devices for a real-time simulation system. Background Art

[0002] In the high-voltage direct current transmission system, the trigger signal of the converter valve is crucial to the stable operation of the system. The real-time simulation system is a digital simulation system used to simulate the operation of the power system, which can simulate the operation process of the power system at real-time or near real-time speed. In the real-time simulation system, the trigger signal of the converter valve is a control signal used to control the conduction and shutdown of the converter valve, thereby realizing the forward conduction of the converter valve. There are two sources of the trigger signal of the converter valve: one is generated by the internal software simulation of the real-time simulation system, and the other is transmitted to the real-time simulation system through an external controller (such as the pole control device of the DC system). For the trigger signal generated by the external controller, the moment when the real-time simulation system receives the pulse is random, which will cause the time error of the simulator response. If the time error is not corrected, non-characteristic harmonics, discontinuous simulation response and subsynchronous oscillation errors may be generated, affecting the simulation accuracy.

[0003] The ignition pulse is one of the trigger signals of the converter valve, which is used to control the conduction angle of the converter valve and affect the forward conduction voltage of the converter valve. If the ignition pulse algorithm is not used, ideally, after the converter valve receives the trigger pulse, the characteristics of the converter valve will suddenly change from a large resistance to a small resistance (conduction), and the forward voltage on the valve will drop to zero, such as Figure 1 The conventional DC valve voltage ideal waveform is shown in Figure 1. However, due to real-time simulation, the algorithm cannot be changed immediately with external signals. Therefore, the traditional ignition pulse algorithm is at the beginning of a new simulation step, that is, Figure 2 At time B in the figure, the trigger is performed, which will cause the simulation result of the converter valve voltage to be inaccurate. Summary of the invention

[0004] The present invention provides an improved ignition pulse trigger optimization method and related devices for a real-time simulation system, which are used to solve the technical problem that the existing ignition pulse algorithm of a converter valve is triggered at the beginning of a new simulation step, resulting in inaccurate simulation results of the converter valve voltage.

[0005] In view of this, a first aspect of the present invention provides an improved ignition pulse trigger optimization method for a real-time simulation system, comprising:

[0006] When receiving a trigger pulse transmitted by an external controller, recording the arrival time of the trigger pulse;

[0007] Calculate pulse division according to the arrival time;

[0008] In the next simulation step after receiving the trigger pulse, a reverse voltage source is connected in series to the on-resistance of the converter valve, wherein the voltage of the reverse voltage source is calculated according to the pulse division, and the voltage calculation formula of the reverse voltage source is:

[0009]

[0010] in, is the voltage of the reverse voltage source, is the simulation step length, is the pulse indexing, is the predicted forward voltage of the converter valve, is the forward voltage of the converter valve in the previous simulation step;

[0011] At the end of the next simulation step, the voltage of the reverse voltage source is set to zero.

[0012] Optionally, after calculating the pulse division according to the arrival time, and before connecting a reverse voltage source in series to the on-resistance of the converter valve within the next simulation step after receiving the trigger pulse, the method further includes:

[0013] Constructing a first relationship model between the pulse division and the predicted forward voltage of the converter valve;

[0014] Constructing a second relationship model between the predicted forward voltage of the converter valve, the pulse division and the voltage of the reverse voltage source;

[0015] A voltage calculation formula of the reverse voltage source is obtained according to the first relationship model and the second relationship model.

[0016] Optionally, the first relationship model is:

[0017]

[0018] in, is the predicted value of the trigger pulse at the corresponding moment of the next simulation step.

[0019] Optionally, the second relationship model is:

[0020] .

[0021] A second aspect of the present invention provides an improved ignition pulse trigger optimization device for a real-time simulation system, comprising:

[0022] A pulse recording module, for recording the arrival time of a trigger pulse transmitted by an external controller when receiving the trigger pulse;

[0023] A pulse division calculation module, used for calculating the pulse division according to the arrival time;

[0024] The reverse voltage source voltage calculation module is used to connect a reverse voltage source in series to the on-resistance of the converter valve within the next simulation step after receiving the trigger pulse, wherein the voltage of the reverse voltage source is calculated according to the pulse division, and the voltage calculation formula of the reverse voltage source is:

[0025]

[0026] in, is the voltage of the reverse voltage source, is the simulation step length, is the pulse indexing, is the predicted forward voltage of the converter valve, is the forward voltage of the converter valve in the previous simulation step;

[0027] The voltage zeroing module is used to reset the voltage of the reverse voltage source to zero when the next simulation step ends.

[0028] Optionally, a mathematical model construction module is further included, wherein the mathematical model construction module is used to:

[0029] Constructing a first relationship model between the pulse division and the predicted forward voltage of the converter valve;

[0030] Constructing a second relationship model between the predicted forward voltage of the converter valve, the pulse division and the voltage of the reverse voltage source;

[0031] A voltage calculation formula of the reverse voltage source is obtained according to the first relationship model and the second relationship model.

[0032] Optionally, the first relationship model is:

[0033]

[0034] in, is the predicted value of the trigger pulse at the corresponding moment of the next simulation step.

[0035] Optionally, the second relationship model is:

[0036] .

[0037] A third aspect of the present invention provides an improved ignition pulse trigger optimization device for a real-time simulation system, the device comprising a processor and a memory:

[0038] The memory is used to store program code and transmit the program code to the processor;

[0039] The processor is used to execute the improved ignition pulse trigger optimization method for the hydrogen real-time simulation system described in any one of the first aspects according to the instructions in the program code.

[0040] A fourth aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store program code, and the program code is used to execute the improved ignition pulse trigger optimization method for the real-time simulation system described in any one of the first aspects.

[0041] It can be seen from the above technical solutions that the improved ignition pulse trigger optimization method for the real-time simulation system provided by the present invention has the following advantages:

[0042] The improved ignition pulse trigger optimization method for the real-time simulation system provided by the present invention first calculates the pulse division of the trigger pulse according to the arrival time when the trigger pulse transmitted by the external controller is received, and then in the next simulation step after receiving the trigger pulse, a reverse voltage source whose voltage is calculated according to the voltage calculation formula of the reverse voltage source provided in the present invention is connected in series to the on-resistance of the converter valve, and at the end of the next simulation step, the voltage of the reverse voltage source is set to zero, so that the forward voltage of the converter valve decreases in a controlled manner, thereby reducing the error caused by the randomness of the pulse receiving time. Through the improved ignition pulse trigger optimization method for the real-time simulation system provided by the present invention, the time error of the real-time simulation system receiving the external trigger signal is stabilized within a fixed step, and the generation of non-characteristic harmonics is also reduced, thereby greatly improving the accuracy and stability of the simulation and ensuring the continuity of the simulation response. The technical problem that the existing converter valve ignition pulse algorithm is triggered at the beginning of a new simulation step, resulting in inaccurate converter valve voltage simulation results, is solved.

[0043] At the same time, the improved ignition pulse trigger optimization method of the real-time simulation system provided by the present invention is suitable for simulation of various high voltage direct current (HVDC) systems, and has wide applicability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 This is the ideal waveform diagram of a conventional DC valve;

[0046] Figure 2 It is the ideal waveform diagram of DC valve voltage of the existing ignition pulse algorithm;

[0047] Figure 3 A schematic flow chart of an improved ignition pulse trigger optimization method for a real-time simulation system provided in an embodiment of the present invention;

[0048] Figure 4 A converter valve voltage waveform diagram of an improved ignition pulse trigger optimization method of a flow-time simulation system provided in an embodiment of the present invention;

[0049] Figure 5 This is the waveform diagram of the RTDS model operation of the DC system when the improved ignition pulse algorithm is not used;

[0050] Figure 6 It is a waveform diagram of the operation of the RTDS model of the DC system when the improved ignition pulse algorithm provided in the present invention is adopted;

[0051] Figure 7 It is a waveform diagram of the operation of the RTDS model of the DC system from not using the improved ignition pulse algorithm to using the improved ignition pulse algorithm provided by the present invention;

[0052] Figure 8 A schematic structural diagram of an improved ignition pulse trigger optimization device for a real-time simulation system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] For easier understanding, see Figure 3 and Figure 4 The present invention provides an embodiment of an improved ignition pulse trigger optimization method for a real-time simulation system, comprising:

[0055] Step 101: When a trigger pulse transmitted by an external controller is received, the arrival time of the trigger pulse is recorded.

[0056] It should be noted that when the real-time simulation system receives the trigger pulse transmitted by the external controller, it records the arrival time of the trigger pulse, such as Figure 4 As shown, point d is the arrival time of the trigger pulse.

[0057] Step 102: Calculate the pulse division according to the arrival time.

[0058] It should be noted that the time difference between the arrival time of the trigger pulse and the end time of the previous simulation step is the pulse division, which is recorded as .like Figure 4 As shown, the first is the current simulation step, the second is the next simulation step. The pulse division value is between 0 and 1.

[0059] Step 103: In the next simulation step after receiving the trigger pulse, a reverse voltage source is connected in series to the on-resistance of the converter valve.

[0060] It should be noted that after the real-time simulation system receives the trigger pulse, within the next simulation step (i.e. Figure 4 In the BC segment, point B is the start time of the next simulation step, and point C is the end time of the next simulation step), a reverse voltage source is connected in series to the on-resistance of the converter valve. The voltage of the reverse voltage source is for:

[0061]

[0062] in, is the voltage of the reverse voltage source, is the simulation step length, is the pulse indexing, is the predicted forward voltage of the converter valve, is the forward voltage of the converter valve in the previous simulation step.

[0063] In one embodiment, the pulse index is calculated at step 102. After that, a first relationship model between the pulse division and the predicted forward voltage of the converter valve and a second relationship model between the predicted forward voltage of the converter valve, the pulse division and the voltage of the reverse voltage source are constructed, and then a voltage calculation formula of the reverse voltage source is obtained according to the first relationship model and the second relationship model. The first relationship model is:

[0064]

[0065] in, is the predicted value of the trigger pulse at the next simulation step. Figure 4 As shown, point d is the arrival time of the trigger pulse, and point e is the corresponding time of the trigger pulse at the next simulation step.

[0066] The second relational model is:

[0067] .

[0068] Combining the first relationship model and the second relationship model, we can get the reverse voltage source The voltage calculation formula is:

[0069] .

[0070] Step 104: At the end of the next simulation step, the voltage of the reverse voltage source is set to zero.

[0071] It should be noted that if Figure 4 As shown, the distance between point A and point B is the current simulation step length, between point B and point C is the next simulation step length. Therefore, in the present invention, between point B and point C For the next simulation step, the real-time simulation system connects a reverse voltage source in series to the on-resistance of the converter valve and At the end of the next simulation step (i.e. point C), the voltage of the reverse voltage source is By adjusting the voltage of the reverse voltage source The size of the trigger pulse received by the real-time simulation system is made constant to a simulation step, thereby achieving fine-tuning of the trigger angle of the converter valve.

[0072] Figure 5 , Figure 6 and Figure 7 The changes of the DC line voltage (UDLA1), DC high-voltage bus current (IDHA1), DC line current (IDLA1), trigger angle (ALPHAA1), arc extinction angle (GAMMAA1) and commutation bus voltage (URMSA) on the rectifier side are given when the DC system is running at the minimum power (150MW) on the single pole loop of pole 1 (the horizontal axis is in seconds). Figure 5 and Figure 6 It can be seen that when the improved ignition pulse algorithm is not used, the DC simulation system operates with large fluctuations and resonance, while when the improved ignition pulse algorithm is used, the DC simulation system operates smoothly. Figure 7 In the simulation time of the first 1 second, both the rectifier side and the inverter side adopt the improved ignition pulse algorithm, but the rectifier side does not adopt the improved ignition pulse algorithm after 1 second. It can be seen that the improved ignition pulse algorithm proposed in the present invention can well improve the operating stability of the DC simulation system. Therefore, the real-time simulation system using the improved ignition pulse trigger optimization method provided by the present invention can more accurately simulate the operating conditions of various high-voltage direct current (HVDC) systems, improve the accuracy and reliability of the simulation results, and provide important technical support for the design, analysis and optimization of power systems.

[0073] The improved ignition pulse trigger optimization method for the real-time simulation system provided by the present invention first calculates the pulse division of the trigger pulse according to the arrival time when the trigger pulse transmitted by the external controller is received, and then in the next simulation step after receiving the trigger pulse, a reverse voltage source whose voltage is calculated according to the voltage calculation formula of the reverse voltage source provided in the present invention is connected in series to the on-resistance of the converter valve, and at the end of the next simulation step, the voltage of the reverse voltage source is set to zero, so that the forward voltage of the converter valve decreases in a controlled manner, thereby reducing the error caused by the randomness of the pulse receiving time. Through the improved ignition pulse trigger optimization method for the real-time simulation system provided by the present invention, the time error of the real-time simulation system receiving the external trigger signal is stabilized within a fixed step, and the generation of non-characteristic harmonics is also reduced, thereby greatly improving the accuracy and stability of the simulation and ensuring the continuity of the simulation response. The technical problem that the existing converter valve ignition pulse algorithm is triggered at the beginning of a new simulation step, resulting in inaccurate converter valve voltage simulation results, is solved.

[0074] At the same time, the improved ignition pulse trigger optimization method of the real-time simulation system provided by the present invention is suitable for simulation of various high voltage direct current (HVDC) systems, and has wide applicability and practicality.

[0075] For easier understanding, see Figure 8 The present invention provides an embodiment of an improved ignition pulse trigger optimization device for a real-time simulation system, comprising:

[0076] A pulse recording module, for recording the arrival time of a trigger pulse when receiving a trigger pulse transmitted by an external controller;

[0077] A pulse division calculation module, used to calculate the pulse division according to the arrival time;

[0078] The reverse voltage source voltage calculation module is used to connect a reverse voltage source in series to the on-resistance of the converter valve within the next simulation step after receiving the trigger pulse, wherein the voltage of the reverse voltage source is calculated according to the pulse division, and the voltage calculation formula of the reverse voltage source is:

[0079]

[0080] in, is the voltage of the reverse voltage source, is the simulation step length, is the pulse indexing, is the predicted forward voltage of the converter valve, is the forward voltage of the converter valve in the previous simulation step;

[0081] The voltage zeroing module is used to set the voltage of the reverse voltage source to zero at the end of the next simulation step.

[0082] It also includes a mathematical model building module, which is used to:

[0083] Constructing a first relationship model between pulse division and predicted forward voltage of a converter valve;

[0084] constructing a second relationship model between the predicted forward voltage of the converter valve, the pulse division and the voltage of the reverse voltage source;

[0085] A voltage calculation formula of the reverse voltage source is obtained according to the first relationship model and the second relationship model.

[0086] The first relational model is:

[0087]

[0088] in, is the predicted value of the trigger pulse at the corresponding moment of the next simulation step.

[0089] The second relational model is:

[0090] .

[0091] The present invention provides an embodiment of an improved ignition pulse trigger optimization device for a real-time simulation system, the device comprising a processor and a memory:

[0092] The memory is used to store the program code and transmit the program code to the processor;

[0093] The processor is used to execute any improved ignition pulse trigger optimization method of the real-time simulation system provided in the present invention according to the instructions in the program code.

[0094] The present invention also provides an embodiment of a computer-readable storage medium, which is used to store program code, and the program code is used to execute any implementation of the improved ignition pulse trigger optimization method for any real-time simulation system provided in the present invention.

[0095] An embodiment of the present application also provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute any one of the implementations of the improved ignition pulse trigger optimization method for a real-time simulation system described in the aforementioned embodiments.

[0096] The improved ignition pulse triggering optimization method device, equipment, computer-readable storage medium and computer program product including instructions for the real-time simulation system provided in the present invention are all used to execute the improved ignition pulse triggering optimization method for the real-time simulation system provided in the present invention. The principle and technical effects achieved are the same as those of the improved ignition pulse triggering optimization method for the real-time simulation system provided in the present invention, and will not be repeated here.

[0097] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0098] The terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0099] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An improved ignition pulse trigger optimization method for a real-time simulation system, characterized in that: include: When receiving a trigger pulse transmitted by an external controller, recording the arrival time of the trigger pulse; Calculate pulse division according to the arrival time; In the next simulation step after receiving the trigger pulse, a reverse voltage source is connected in series to the on-resistance of the converter valve, wherein the voltage of the reverse voltage source is calculated according to the pulse division, and the voltage calculation formula of the reverse voltage source is: in, is the voltage of the reverse voltage source, is the simulation step length, is the pulse indexing, is the predicted forward voltage of the converter valve, is the forward voltage of the converter valve in the previous simulation step; At the end of the next simulation step, the voltage of the reverse voltage source is set to zero.

2. The improved ignition pulse trigger optimization method of the real-time simulation system according to claim 1, characterized in that: After calculating the pulse division according to the arrival time, and before connecting a reverse voltage source in series to the on-resistance of the converter valve within the next simulation step after receiving the trigger pulse, the method further includes: Constructing a first relationship model between the pulse division and the predicted forward voltage of the converter valve; Constructing a second relationship model between the predicted forward voltage of the converter valve, the pulse division and the voltage of the reverse voltage source; A voltage calculation formula of the reverse voltage source is obtained according to the first relationship model and the second relationship model.

3. The improved ignition pulse trigger optimization method of the real-time simulation system according to claim 2, characterized in that: The first relational model is: in, is the predicted value of the trigger pulse at the corresponding moment of the next simulation step.

4. The improved ignition pulse trigger optimization method of the real-time simulation system according to claim 3 is characterized in that: The second relational model is: 。 5. An improved ignition pulse trigger optimization device for a real-time simulation system, characterized in that: include: A pulse recording module, for recording the arrival time of a trigger pulse transmitted by an external controller when receiving the trigger pulse; A pulse division calculation module, used for calculating the pulse division according to the arrival time; The reverse voltage source voltage calculation module is used to connect a reverse voltage source in series to the on-resistance of the converter valve within the next simulation step after receiving the trigger pulse, wherein the voltage of the reverse voltage source is calculated according to the pulse division, and the voltage calculation formula of the reverse voltage source is: in, is the voltage of the reverse voltage source, is the simulation step length, is the pulse indexing, is the predicted forward voltage of the converter valve, is the forward voltage of the converter valve in the previous simulation step; The voltage zeroing module is used to reset the voltage of the reverse voltage source to zero when the next simulation step ends.

6. The improved ignition pulse trigger optimization device of the real-time simulation system according to claim 5, characterized in that: Also included is a model building module, the model building module is used to: Constructing a first relationship model between the pulse division and the predicted forward voltage of the converter valve; Constructing a second relationship model between the predicted forward voltage of the converter valve, the pulse division and the voltage of the reverse voltage source; A voltage calculation formula of the reverse voltage source is obtained according to the first relationship model and the second relationship model.

7. The improved ignition pulse trigger optimization device of the real-time simulation system according to claim 6, characterized in that: The first relational model is: in, is the predicted value of the trigger pulse at the corresponding moment of the next simulation step.

8. The improved ignition pulse trigger optimization method of the real-time simulation system according to claim 7, characterized in that: The second relational model is: 。 9. An improved ignition pulse trigger optimization device for a real-time simulation system, characterized in that: The device comprises a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the improved ignition pulse trigger optimization method of the real-time simulation system according to any one of claims 1 to 4 according to the instructions in the program code.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store program codes, and the program codes are used to execute the improved ignition pulse trigger optimization method for the real-time simulation system according to any one of claims 1 to 4.

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