ADPSS-based hydraulic turbine isolated grid control parameter verification device and use method

Abstract

The present invention relates to the technical field of hydroelectric units, and is an ADPSS-based turbine isolated grid control parameter verification device and a method of use, including an ADPSS simulation platform simulating and outputting a grid frequency signal, and receiving a power signal output by a hydroelectric unit speed governor simulation platform for iterative calculation; the hydroelectric unit speed governor simulation platform combines the grid frequency signal simulation to determine the guide vane opening signal, and converts the guide vane opening signal into a power signal; a transmission device builds a communication link between the ADPSS simulation platform and the hydroelectric unit speed governor simulation platform. The present invention improves the simulation speed and authenticity of the hydroelectric unit speed governor in an isolated grid mode through the heterogeneous parallelization of an FPGA module, a physical interface box, and a turbine speed governor simulation platform, and solves the problem that when the current turbine isolated grid control parameter setting uses a frequency step disturbance, only a step amount of a given step length can be used, and there is no effective interaction between the turbine and the grid.

Description

Technical Field

[0001] The invention relates to the technical field of hydroelectric generator sets, in particular to an ADPSS-based turbine isolated grid control parameter verification device and a use method thereof. Background Art

[0002] There are many manufacturers of hydropower unit speed regulators, and there is no unified standard for control logic. Even the control logic of the speed regulators produced by the same manufacturer is not the same as that written by different technicians. Especially in the process of setting the parameters of the isolated grid, due to the lack of relevant test guidelines and national and industry normative guidance, the control parameters of the isolated grid are often set based on personal experience and habits, without considering the proportion of power generation in the regional power grid where the unit is located, the size of the water hammer effect of the turbine, and other factors. Therefore, when the unit is operating in the isolated grid mode, it often cannot achieve the expected effect. In addition, in the process of simulating the model parameters of the hydropower unit speed regulator, a fixed-step frequency step is used. However, there is an interactive characteristic between the real power grid and the power generation equipment. As the power of the power generation equipment is adjusted, the network frequency fluctuation has the characteristics of variable amplitude and variable step length. The simulation results of the traditional fixed-step frequency disturbance model parameters of the hydropower unit speed regulator are quite different from the actual ones. Summary of the invention

[0003] The present invention provides an ADPSS-based turbine isolated grid control parameter verification device and a method for use, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem of lack of real-time interaction between simulation and power grid in the existing turbine isolated grid mode.

[0004] One of the technical solutions of the present invention is achieved by the following measures: A device for checking control parameters of an isolated power grid of a water turbine based on ADPSS, characterized in that it comprises:

[0005] ADPSS simulation platform simulates and outputs grid frequency signals, and receives power signals output by the hydropower unit speed governor simulation platform for iterative calculation to complete the verification of turbine isolated grid control parameters;

[0006] The hydropower unit speed governor simulation platform combines the grid frequency signal simulation to determine the guide vane opening signal and converts the guide vane opening signal into a power signal;

[0007] The transmission device builds the communication link between the ADPSS simulation platform and the hydropower unit speed governor simulation platform to realize signal transmission.

[0008] The following are further optimizations and / or improvements to the above technical solutions:

[0009] The above-mentioned ADPSS simulation platform includes:

[0010] Physical interface box, the main control simulation device controls the physical interface box to simulate and output the power grid frequency signal;

[0011] The main control simulation device obtains the power signal transmitted by the hydropower unit speed governor simulation platform through the physical interface box and the platform communication device, and iteratively calculates the power signal to complete the turbine isolated network control parameter verification;

[0012] The platform communication device connects the main control simulation device and the physical interface box to build a communication link.

[0013] The above-mentioned communication device is a PCI-E bus.

[0014] The above-mentioned hydropower unit speed governor simulation platform includes:

[0015] The core control device of the hydropower unit speed governor simulation, according to the received grid frequency signal and the setting of the control logic, simulates the primary frequency regulation action in the grid-connected mode or the grid frequency tracking action in the isolated grid mode, and outputs the guide vane opening signal;

[0016] The opening-power conversion I / O board converts the guide vane opening signal according to the corresponding relationship between the opening and power of the simulated unit to obtain the corresponding power signal.

[0017] The above transmission device is a high-speed I / O optical fiber.

[0018] The second technical solution of the present invention is achieved by the following measures: a method for using a turbine isolated grid control parameter verification device based on ADPSS, comprising:

[0019] The ADPSS simulation platform simulates and outputs the grid frequency signal, which is then transmitted to the hydropower unit speed governor simulation platform through a transmission device;

[0020] The hydropower unit speed governor simulation platform simulates the primary frequency regulation action in the grid-connected mode or the grid frequency tracking action in the isolated grid mode according to the received grid frequency signal and the setting of the control logic, and outputs the guide vane opening signal;

[0021] The hydropower unit speed governor simulation platform converts the guide vane opening signal according to the corresponding relationship between the opening and power of the simulated unit, obtains the corresponding power signal, and transmits it to the ADPSS simulation platform through the transmission device;

[0022] The ADPSS simulation platform iteratively calculates the power signal and completes the verification of the turbine isolated grid control parameters.

[0023] The present invention places the grid power and frequency simulation calculations on the FPGA module through the heterogeneous parallelization of the FPGA module, the physical interface box and the turbine governor simulation platform. The turbine governor simulation platform independently receives the grid frequency signal output by the FPGA module, calculates and simulates the output of the guide vane opening signal of the hydropower unit through the internal operation of the turbine governor simulation platform, and converts the guide vane opening signal into a power signal according to the corresponding curve of the guide vane opening and power of the actual unit and transmits it to the FPGA module, so as to simulate and realize the power interaction between the hydropower unit and the grid. By realizing a reasonably designed simulation interface, a perfect balance between calculation speed and accuracy is achieved, thereby realizing the interaction between the turbine governor and the grid. Real-time simulation of frequency disturbance; while ensuring the simulation accuracy, the present invention greatly optimizes the turbine isolated grid control parameters, improves the frequency stability of the power grid under isolated grid mode operation, and improves the simulation speed and authenticity of the hydropower unit speed governor in isolated grid mode, and realizes the closed-loop experimental capability of the hydropower unit speed governor with an external actual controller, which solves the problem that when the current turbine isolated grid control parameter setting uses frequency step disturbance, only the step amount of a given step length can be used, and the changing characteristics of the variable step length and frequency difference when the power grid frequency fluctuates cannot be truly reflected, and the turbine and the power grid cannot effectively interact with each other. It truly reflects the inevitable signal transmission delay generated by each component in the actual operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 It is a schematic diagram of the device structure of the present invention.

[0025] Attached Figure 2 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0026] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0027] The present invention will be further described below in conjunction with embodiments and drawings:

[0028] Embodiment 1: As attached Figure 1 As shown, the embodiment of the present invention discloses a device for checking control parameters of an isolated power grid of a water turbine based on ADPSS, comprising:

[0029] ADPSS simulation platform simulates and outputs grid frequency signals, and receives power signals output by the hydropower unit speed governor simulation platform for iterative calculation to complete the verification of turbine isolated grid control parameters;

[0030] The above-mentioned ADPSS simulation platform may be an ADPSS server, which may specifically include:

[0031] 1. Physical interface box: the main control simulation device controls the physical interface box to simulate and output the power grid frequency signal; the physical interface box performs filtering and other processing on the analog input signal to generate the corresponding analog output signal, and sends the processed analog output information to the external physical device;

[0032] 2. The main control simulation device obtains the power signal transmitted by the hydropower unit speed governor simulation platform through the physical interface box and the platform communication device, and iteratively calculates the power signal until the simulation iterative calculation is completed, and the turbine isolated grid control parameter verification is completed; the main control simulation device here can be an FPGA module to realize simulation calculation;

[0033] 3. The platform communication device connects the main control simulation device and the physical interface box to build a communication link. Here, the platform communication device is a PCI-E bus.

[0034] The hydropower unit speed governor simulation platform combines the grid frequency signal simulation to determine the guide vane opening signal and converts the guide vane opening signal into a power signal;

[0035] The above-mentioned hydropower unit speed governor simulation platform includes:

[0036] 1. The core control device for simulating the speed governor of a hydropower unit simulates a frequency modulation action in a grid-connected mode or a grid frequency tracking action in an isolated grid mode according to the received grid frequency signal and the setting of the control logic, and outputs a guide vane opening signal; the core control device for simulating the speed governor of a hydropower unit here can be a PLC controller;

[0037] 2. Opening-power conversion I / O board converts the guide vane opening signal according to the corresponding relationship between the opening and power of the simulated unit to obtain the corresponding power signal.

[0038] The transmission device builds a communication link between the ADPSS simulation platform and the hydropower unit speed regulator simulation platform to achieve signal transmission. The transmission device here can be a high-speed I / O optical fiber. The high-speed I / O requires 8 analog inputs and outputs and 4 switch inputs and outputs. The key analog signals are the grid frequency and the hydropower unit power. The key switch signals are the grid-side high-frequency machine-cutting output signal and the hydropower unit high-frequency isolated grid mode signal.

[0039] The present invention places the grid power and frequency simulation calculations on the FPGA module through the heterogeneous parallelization of the FPGA module, the physical interface box and the turbine governor simulation platform. The turbine governor simulation platform independently receives the grid frequency signal output by the FPGA module, calculates and simulates the output of the guide vane opening signal of the hydropower unit through the internal operation of the turbine governor simulation platform, and converts the guide vane opening signal into a power signal according to the corresponding curve of the guide vane opening and power of the actual unit and transmits it to the FPGA module, so as to simulate and realize the power interaction between the hydropower unit and the grid. By realizing a reasonably designed simulation interface, a perfect balance between calculation speed and accuracy is achieved, thereby realizing the interaction between the turbine governor and the grid. Real-time simulation of frequency disturbance; while ensuring the simulation accuracy, the present invention greatly optimizes the turbine isolated grid control parameters, improves the frequency stability of the power grid under isolated grid mode operation, and improves the simulation speed and authenticity of the hydropower unit speed governor in isolated grid mode, and realizes the closed-loop experimental capability of the hydropower unit speed governor with an external actual controller, which solves the problem that when the current turbine isolated grid control parameter setting uses frequency step disturbance, only the step amount of a given step length can be used, and the changing characteristics of the variable step length and frequency difference when the power grid frequency fluctuates cannot be truly reflected, and the turbine and the power grid cannot effectively interact with each other. It truly reflects the inevitable signal transmission delay generated by each component in the actual operation process.

[0040] Embodiment 2: As attached Figure 2 As shown, the embodiment of the present invention discloses a method for using a turbine isolated grid control parameter verification device based on ADPSS, comprising:

[0041] Step S101, the ADPSS simulation platform simulates and outputs a grid frequency signal, and transmits it to the hydropower unit speed governor simulation platform through a transmission device; the grid frequency signal here is determined according to actual conditions;

[0042] Step S102, the hydropower unit speed governor simulation platform simulates a primary frequency regulation action in the grid-connected mode or a grid frequency tracking action in the isolated grid mode according to the received grid frequency signal and the setting of the control logic, and outputs a guide vane opening signal;

[0043] Step S103, the hydropower unit speed governor simulation platform converts the guide vane opening signal according to the corresponding relationship between the opening and power of the simulated unit, obtains the corresponding power signal, and transmits it to the ADPSS simulation platform through a transmission device;

[0044] Step S104, the ADPSS simulation platform iteratively calculates the power signal to complete the verification of the turbine isolated grid control parameters.

[0045] The above step S102 is executed in the hydropower unit speed governor simulation core control device, and step S103 is executed in the opening-power conversion I / O board.

[0046] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A device for checking control parameters of isolated power grid of hydraulic turbine based on ADPSS, characterized in that: include: ADPSS simulation platform simulates and outputs grid frequency signals, and receives power signals output by the hydropower unit speed governor simulation platform for iterative calculation to complete the verification of turbine isolated grid control parameters; The hydropower unit speed governor simulation platform combines the grid frequency signal simulation to determine the guide vane opening signal and converts the guide vane opening signal into a power signal; The transmission device builds the communication link between the ADPSS simulation platform and the hydropower unit speed governor simulation platform to realize signal transmission.

2. The ADPSS-based turbine isolated grid control parameter verification device according to claim 1, characterized in that: The ADPSS simulation platform comprises: Physical interface box, the main control simulation device controls the physical interface box to simulate and output the power grid frequency signal; The main control simulation device obtains the power signal transmitted by the hydropower unit speed governor simulation platform through the physical interface box and the platform communication device, and iteratively calculates the power signal to complete the turbine isolated network control parameter verification; The platform communication device connects the main control simulation device and the physical interface box to build a communication link.

3. The ADPSS-based turbine isolated grid control parameter verification device according to claim 2, characterized in that: The platform communication device is a PCI-E bus.

4. The ADPSS-based turbine isolated grid control parameter verification device according to claim 1, 2 or 3, characterized in that: The hydropower unit speed governor simulation platform comprises: The core control device of the hydropower unit speed governor simulation, according to the received grid frequency signal and the setting of the control logic, simulates the primary frequency regulation action in the grid-connected mode or the grid frequency tracking action in the isolated grid mode, and outputs the guide vane opening signal; The opening-power conversion I / O board converts the guide vane opening signal according to the corresponding relationship between the opening and power of the simulated unit to obtain the corresponding power signal.

5. The ADPSS-based turbine isolated grid control parameter verification device according to claim 1, 2 or 3, characterized in that: The transmission device is a high-speed I / O optical fiber.

6. The ADPSS-based turbine isolated grid control parameter verification device according to claim 4, characterized in that: The transmission device is a high-speed I / O optical fiber.

7. A method for using the ADPSS-based turbine isolated grid control parameter verification device according to any one of claims 1 to 6, characterized in that: include: The ADPSS simulation platform simulates and outputs the grid frequency signal, which is then transmitted to the hydropower unit speed governor simulation platform through a transmission device; The hydropower unit speed governor simulation platform simulates the primary frequency regulation action in the grid-connected mode or the grid frequency tracking action in the isolated grid mode according to the received grid frequency signal and the setting of the control logic, and outputs the guide vane opening signal; The hydropower unit speed governor simulation platform converts the guide vane opening signal according to the corresponding relationship between the opening and power of the simulated unit, obtains the corresponding power signal, and transmits it to the ADPSS simulation platform through the transmission device; The ADPSS simulation platform iteratively calculates the power signal and completes the verification of the turbine isolated grid control parameters.

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