CN107247418B - Dynamic simulation experiment platform device for electric power system - Google Patents
Dynamic simulation experiment platform device for electric power system Download PDFInfo
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Abstract
The invention provides a dynamic simulation experiment platform device of an electric power system, which comprises a valve base controller, a unit simulation and control module, a digital simulator interface module, an upper computer and a real-time digital simulator. The valve base controller is sequentially connected with the unit simulation and control module, the digital simulator interface module and the real-time digital simulator through high-speed optical fibers, and the digital simulator interface module is also connected with the upper computer through the Ethernet. The simulation experiment platform device not only can realize a conventional dynamic simulation experiment of the power system, but also can simulate various characteristics of the power unit, simulate various faults of the power unit, and solve and make up the defects of response and test to unit level faults in the existing system of the movable mould experiment platform.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a dynamic simulation experiment platform device of a power system.
Background
The dynamic simulation experiment of the power system is a method for simulating the physical layer of the power system, constructing an experimental environment by using a physical model with the same physical characteristics as the prototype system and obtaining a conclusion through the simulation experiment. The main purpose is to ensure the reliability of the valve protection and control device in the field operation by checking the performance index of the protection and control device (valve base controller) in the power system, which is an essential link in the research and development of high-power electronic equipment.
In general, the test method of the movable mode test mainly comprises the steps of constructing a closed loop test system through an RTDS (Real TimeDigital Simulator, RTDS real-time digital simulator) or other similar power electronic simulation systems to carry out simulation verification, constructing a test model to simulate various operation conditions and fault states of an actual power system, and enabling key investigation subjects of the movable mode test to accurately respond to various operation conditions and faults when a valve-based controller operates on site.
Because the RTDS (real-time digital simulator) simulator only sets the most basic switching value signal and bypass function for a single power unit simulation model of the valve tower, the actual characteristics of the power unit modules which are self-developed by various manufacturers are not optimized, and the valve base controller of the traditional movable mould platform generally neglects to verify certain specific faults of the single power unit.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a dynamic simulation experiment platform device for an electric power system, which aims at the technical defects existing in the prior art, adopts a combination mode of a plurality of unit simulation and control modules to build a simulation valve tower structure of a power unit, and simultaneously simulates the unit control board logic of the power unit and the electronic and mechanical characteristics of the power unit by logic control.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a dynamic simulation experiment platform device of an electric power system comprises a valve base controller, a unit simulation and control module, a digital simulator interface module, an upper computer and a real-time digital simulator.
The valve base controller is sequentially connected with the unit simulation and control module, the digital simulator interface module and the real-time digital simulator through high-speed optical fibers, and the digital simulator interface module is also connected with the upper computer through the Ethernet.
The number of the unit simulation and control modules is multiple, each unit simulation module and each unit control module comprise a unit simulation module and a plurality of unit control modules, the unit simulation modules and the unit control modules all use FPGA chips as main chips for logic realization, one simulation unit module chip is connected with the plurality of unit control module chips through IO pins and can receive state information of multiple paths of unit control modules, the unit control modules are consistent with control logic of unit control boards in power units used in actual projects, the unit simulation modules simulate electronic and mechanical characteristics of the power units by adopting control logic, each unit simulation and control module can simulate valve sub-modules of the plurality of power units according to the number of the unit control modules, and the plurality of unit simulation and control modules are respectively connected with a valve base controller and a real-time digital simulator in an optical fiber mode, so that a valve tower for a movable mode experiment platform is built.
The valve base controller structure is consistent with the valve base controller in the actual engineering of the electric power system in equal proportion, and is used for simulating the actual valve base controller, receiving the power unit capacitor voltage signal fed back by the real-time digital simulator, performing calculation of a core algorithm and generating a driving pulse command of each power device in the simulated valve tower; and meanwhile, receiving an analog unit fault signal generated by each unit analog module, generating a bypass protection signal and a system control command signal required by a unit control module, calculating the switching value of a power device in a closed loop mode through a core algorithm, and providing a protection signal for a valve tower according to a valve body protection strategy when a valve breaks down.
The unit simulation module generates a driving feedback signal according to the setting of the upper computer and the feedback signal time sequence of the power device driving board in the actual engineering, and sends the driving feedback signal to all power device driving feedback signal interfaces of the plurality of unit control modules so as to simulate the fault condition of the power device driving board or a single power device in the power unit module.
The program module structure in the unit simulation and control module comprises a unit control logic module, a simulation unit command analysis module and a data bus interface, wherein the simulation unit logic module receives and transmits data transmitted by the data bus interface, the data are distributed into two formats of data and control data, the simulation unit command analysis module analyzes the data, the unit control logic module takes the received configuration data as parameters of unit faults, and the control data can set various faults in real time.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention discloses a dynamic simulation experiment platform device for an electric power system, which adopts a combination mode of a plurality of unit simulation and control modules to build a simulation valve tower structure of a power unit, and simultaneously simulates the unit control board logic of the power unit and the electronic and mechanical characteristics of the power unit by logic control, so that all fault states of the power unit in real engineering can be simulated, wherein a specific fault comprises 1) unit water leakage alarm fault 2) power device driving abnormality 3) capacitance sensor pressure alarm 4) energy taking power supply abnormality 5) bypass failure 6) energy taking power supply and power losing time sequence. Make up for the deficiency of the existing simulator.
2. The dynamic simulation experiment platform device for the power system not only can perform experiments on a simulated valve base controller, but also can simulate various characteristics of a power unit and simulate various faults of the power unit, and solves and makes up the defects of response and test on unit level faults in the existing system of a movable mould experiment platform.
3. The number of the unit simulation and control modules in the dynamic simulation experiment platform device for the electric power system is not limited, and various numbers can be set according to the requirement of a simulation valve tower.
4. The dynamic simulation experiment platform device for the electric power system adopts the digital simulator interface module to provide a route interface for the unit simulation and control module, the upper computer and the digital simulator, and is convenient for receiving and transmitting data.
5. The dynamic simulation experiment platform device for the power system is a power electronic simulation system, saves the cost of building a power device, is complementary with a real-time digital simulation system, and has the characteristics of high fitting degree, low cost, flexibility, variability, strong controllability, easiness in popularization and the like.
Drawings
FIG. 1 is a diagram of the overall architecture of a dynamic simulation experiment platform device for an electric power system;
FIG. 2 is a schematic diagram of a dynamic simulation experiment platform device for an electric power system according to the present invention;
FIG. 3 is a schematic diagram of a circuit structure of a cell simulation and control module according to the present invention;
FIG. 4 is a circuit block diagram of a digital simulator interface module of the present invention;
FIG. 5 is a schematic diagram of a modular multilevel topology simulated by a cell simulation and control module in an embodiment of the invention;
FIG. 6 is a schematic diagram of the internal data processing logic of the cell simulation and control module of the present invention.
Detailed Description
The following detailed description of the embodiments of the invention is provided with reference to the accompanying drawings.
As shown in fig. 1, the dynamic simulation experiment platform device for the electric power system comprises a valve base controller K1, a unit simulation and control module K2, a digital simulator interface module K3, an upper computer and a real-time digital simulator K4.
The valve base controller K1 is sequentially connected with the unit simulation and control module K2, the digital simulator interface module K3 and the real-time digital simulator K4 through high-speed optical fibers, and the digital simulator interface module K3 is also connected with an upper computer through an Ethernet.
As shown in fig. 2 and 3, the number of the unit simulation and control modules K2 is multiple, each unit simulation and control module comprises a unit simulation module and multiple unit control modules, the unit simulation modules and the unit control modules all use FPGA chips as main chips for logic implementation, one simulation unit module chip is connected with the multiple unit control module chips through IO pins and can receive state information of multiple unit control modules, wherein the unit control modules are consistent with control logic of unit control boards in power units used in actual projects, the unit simulation modules simulate electronic and mechanical characteristics of the power units by adopting control logic, each unit simulation and control module K2 can simulate valve sub-modules of multiple power units according to the number of the unit control modules therein, and the multiple unit simulation and control modules K2 are respectively connected with the valve base controller K1 and the real-time digital simulator K4 in an optical fiber mode, so as to construct a valve tower for a movable die experiment platform.
As shown in fig. 3, in the unit simulation and control module K2, the unit simulation module and the unit control module both use FPGA chips as main chips for logic implementation, and the unit simulation module is connected with the plurality of unit control modules through IO pins, and the unit simulation module and the unit control module are both connected with the optical fiber interface through the communication interface circuit. The chip model of the unit control module is preferably 10M16SCE144i7, and the chip model of the unit simulation module is preferably 10M50DCF256C8.
As shown in fig. 4, the digital simulator interface module K3 includes an FPGA main chip EP3C16F48417 and a plurality of optical transceiver modules 74act00, where the FPGA main chip is connected to the plurality of optical transceiver modules through a data bus, and is connected to the real-time digital simulator K4 and the plurality of unit simulation and control modules K2 through the plurality of optical transceiver modules, so as to implement a multi-path optical fiber transceiver communication function.
Fig. 2 shows an example in which: one unit simulation module (lu_sim) corresponds to four-way unit control modules (lu_a, lu_b, lu_c, lu_d), i.e., one unit simulation and control module can simulate state information of four power units, using a combination of a plurality of unit simulation and control modules K2 and a real-time digital simulator K4.
Fig. 5 is a topology of a structural combination of a plurality of four-way controlled unit simulation and control modules K2 in the embodiment of fig. 2, where n×4 represents the number of sub-modules SM in fig. 3, because one unit simulation and control module K2 can simulate four SM modules. The valve tower for experiments is simulated and built, wherein the number of simulated power submodules SM is not limited, the number of unit simulation and control modules K2 can be configured according to the requirements, and the experimental schemes of the submodules with different numbers can be met.
The valve base controller K1 is consistent in structure with the valve base controller in the actual engineering of the electric power system in equal proportion, and is used for simulating the actual valve base controller, receiving the power unit capacitor voltage signal fed back by the real-time digital simulator K4, calculating a core algorithm and generating a driving pulse command of each power device in the simulated valve tower; and meanwhile, receiving an analog unit fault signal generated by each unit analog module, generating a bypass protection signal and a system control command signal required by a unit control module, calculating the switching value of a power device in a closed loop mode through a core algorithm, and providing a protection signal for a valve tower according to a valve body protection strategy when a valve breaks down.
The unit simulation module generates a driving feedback signal according to the setting of the upper computer and the feedback signal time sequence of the power device driving board in the actual engineering, and sends the driving feedback signal to all power device driving feedback signal interfaces of the plurality of unit control modules so as to simulate the fault condition of the power device driving board or a single power device in the power unit module.
As shown in fig. 6, the program module structure in the unit simulation and control module K2 includes a unit control logic module, a simulation unit command analysis module, and a data bus interface, where the simulation unit logic module receives and transmits data transmitted by the data bus interface, allocates two formats of data and control data, and the simulation unit command analysis module analyzes the data, and the unit control logic module uses the received configuration data as parameters of unit faults, and the control data can set occurrence of various faults in real time.
The specific faults which can be triggered in the unit simulation module comprise 1) unit water leakage alarm faults, 2) power device driving abnormality, 3) capacitance sensor pressure alarm, 4) energy taking power supply abnormality, 5) bypass failure, and 6) time sequence of power taking and power losing of the energy taking power supply.
The following is a fault simulation control process of various power units:
1) The unit simulation module LU_SIM generates a driving feedback signal according to the setting of the upper computer and the feedback signal time sequence of the power device driving plate, and sends the driving feedback signal to all power device driving feedback signal interfaces of four unit control modules such as LU-A, LU-B, LU-C, LU-D and the like so as to simulate the fault condition of the driving plate of the power device in the power unit module or a single power device.
2) The unit simulation module LU_SIM generates bypass contactor state feedback signals according to the mechanical characteristics of auxiliary contacts of the bypass contactor and sends the bypass contactor state feedback signals to four unit control board bypass contactor state feedback signal interfaces such as LU-A, LU-B, LU-C and LU-D according to the setting of an upper computer so as to simulate the condition of abnormal driving of the bypass contactor of the power unit module or abnormal occurrence of a single power device.
3) The unit simulation module LU_SIM generates a water leakage sensor feedback signal according to the electronic characteristics of the water leakage alarm detection driving sensor according to the setting of the upper computer, and sends the water leakage sensor feedback signal to the state feedback signal interfaces of the water leakage alarm sensors of the four unit control boards, such as LU-A, LU-B, LU-C and LU-D, so as to simulate the abnormal situation of the water leakage sensor of the power unit module.
4) The unit simulation module LU_SIM generates an energy taking power supply abnormality fault signal according to the electronic characteristics of the energy taking power supply abnormality feedback signal on the unit according to the setting of the upper computer, and sends the energy taking power supply abnormality fault signal to the unit control module energy taking power supply abnormality feedback signal interface so as to simulate the situation when the energy taking power supply of the power unit module is abnormal.
5) The unit simulation module LU_SIM controls the power on/off of four unit control modules such as LU-A, LU-B, LU-C, LU-D according to the setting of the upper computer and the power on/off time sequence of the power taking source of the power unit so as to simulate the power on/off condition of the power taking source of the power unit module.
The unit simulation module LU_SIM generates an AD conversion chip signal output interface signal according to the interface time sequence of the AD chip on the actual unit simulation and control module K2 so as to simulate the output signal time sequence of the AD conversion chip of the four power unit modules, such as LU-A, LU-B, LU-C and LU-D.
The digital simulator interface module K3 provides communication interfaces for the unit simulation and control module K2, the upper computer and the digital simulator K4 and is used for providing a physical channel for communicating with the real-time digital simulator K4. The system has the functions of data summarization and distribution. On one hand, the interface module of the real-time digital simulator can communicate with the real-time digital simulator, collect and transmit uplink and downlink data of the plurality of unit simulation modules, and on the other hand, the interface module of the real-time digital simulator can communicate with an upper computer through Ethernet to monitor and trigger the state of the unit in real time.
The data receiving and transmitting function of the digital simulator interface module comprises the following steps:
1) The digital simulator interface module K3 is arranged in a one-to-many mode, and one real-time digital simulator interface module K3 can collect and distribute data of a plurality of unit simulation and control modules K2;
2) Receiving downlink data such as switch driving pulse signals of each power device and bypass protection commands sent by a multipath unit simulation and control module K2, and summarizing the downlink data into an interface protocol digital simulator for simulation of an analog valve tower;
3) Receiving uplink data such as capacitor voltage information fed back by the digital simulator K4, transmitting a decompressed data packet format according to a communication protocol specified by the digital simulator, and distributing the decompressed data packet format to an uplink multipath simulation unit module to a valve base controller for operation of a closed-loop algorithm;
4) Receiving a simulation unit parameter command sent by an upper computer, distributing fault triggering state information to each simulation unit module, and setting parameters and triggering faults of each unit simulation and control module K2 in real time;
5) The information of the receiving unit simulation and control module K2 comprises the switching state of the power device simulated by each simulation unit module, the state information of the fault of the simulation unit and the capacitance voltage information, and the information is transmitted to the upper computer for monitoring the unit level fault and the state according to the Ethernet protocol;
the real-time digital simulator K4 can adopt RTDS or RTLab and the like for establishing a digital model of the valve tower.
The upper computer is an industrial personal computer, and the upper computer interface is used for simulating the setting of unit module parameters and fault parameters and the real-time triggering and monitoring of unit faults.
The valve base controller K1 is connected with the unit simulation and control module K2 through optical fibers, the unit simulation and control module K2 is connected with the real-time digital simulator interface board K3 through a high-speed bus, the real-time digital simulator interface board K3 is connected with the real-time digital simulator K4 through optical fibers, and the optical fibers and the high-speed bus are used for data transmission of the sub-modules. The real-time digital interface module K3 is connected with the upper computer by using a network cable, and parameter setting and unit state monitoring information of the analog unit module are used for exchanging and transmitting data through the network cable.
The valve base controller K1 is used for calculating a core algorithm mainly according to the capacitor voltage of the power unit fed back by the real-time digital simulator, generating a driving pulse command of each power device in the analog valve tower, and simultaneously producing signals such as bypass protection signals, system control commands and the like required by the unit control module according to analog unit faults generated by each unit analog module.
The unit control module mainly receives a command sent by the valve control, generates a driving pulse signal according to the on and off commands of the power switch device of the valve base controller, and sends the driving pulse signal to the analog unit module.
The digital simulator interface module K3 is mainly used for receiving the pulse driving signals of the multipath power devices sent by the analog unit module, on one hand, integrating the pulse driving signals into an interface protocol of the real-time digital simulator, and sending the interface protocol to the real-time digital simulator to serve as parameters of the analog valve tower; on the other hand, the power unit states sent by the multipath analog unit modules are integrated into data packets, and the data packets are sent to an upper computer through the Ethernet to monitor unit faults and operation states.
The protection signal and the pulse driving command generated by the unit control module are transmitted to the unit simulation module, and after the unit simulation module receives the command transmitted by the unit control module, the following actions 1) generate a corresponding power switch module driving feedback signal according to the setting and transmit the feedback signal back to the unit control module. 2) Generating a unit fault signal and feeding back the fault signal to a unit control module, and transmitting a driving signal to an RTDS interface module in a mode of simulating the state 3) of a unit when the fault signal occurs, and transmitting the driving signal to a real-time digital simulator 4) after the digital simulator interface module receives the driving signal of the power switch device, transmitting the state of the unit and the fault state to the real-time digital simulator interface module and transmitting the state of the unit and the fault state to an upper computer through an Ethernet.
The power system dynamic simulation experiment platform device provided by the invention has the advantages that the upper computer is connected with the system during experiments, and the state value, faults and other information of the simulation unit module of the system can be fed back to the upper computer interface in real time, so that the working state of each power unit can be observed in real time, and meanwhile, the state and faults of the power units and the capacitance voltage value fed back by the real-time digital simulator equipment can be transmitted to the interface in real time for debugging and verification of on-site logic and protection logic.
The above examples are implemented on the premise of the technical scheme of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the above examples. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (3)
1. The dynamic simulation experiment platform device for the electric power system is characterized by comprising a valve base controller, a unit simulation and control module, a digital simulator interface module, an upper computer and a real-time digital simulator;
the valve base controller is sequentially connected with a unit simulation and control module, a digital simulator interface module and a real-time digital simulator through high-speed optical fibers, and the digital simulator interface module is also connected with an upper computer through an Ethernet;
the system comprises a plurality of unit simulation and control modules, wherein each unit simulation and control module comprises a unit simulation module LU_SIM and a plurality of unit control modules, the unit simulation modules and the unit control modules use FPGA chips as main chips for logic realization, one unit simulation module chip is connected with the plurality of unit control module chips through IO pins and receives state information of a plurality of paths of unit control modules, the unit control modules are consistent with unit control board control logic in power units used in actual projects, the unit simulation modules simulate the electronic and mechanical characteristics of the power units by adopting control logic, each unit simulation and control module can simulate valve sub-modules of the plurality of power units according to the number of the unit control modules, and the plurality of unit simulation and control modules are respectively connected with a valve base controller and a real-time digital simulator by optical fibers to construct a valve tower for a movable die experiment platform;
the unit simulation module LU_SIM generates a driving feedback signal according to the setting of the upper computer and the feedback signal time sequence of the power device driving plate, and sends the driving feedback signal to all power device driving feedback signal interfaces of four unit control modules LU-A, LU-B, LU-C and LU-D so as to simulate the fault condition of the driving plate of the power device in the power unit module or a single power device;
the unit simulation module LU_SIM generates bypass contactor state feedback signals according to the mechanical characteristics of auxiliary contacts of the bypass contactor and sends the bypass contactor state feedback signals to four unit control module bypass contactor state feedback signal interfaces LU-A, LU-B, LU-C and LU-D according to the setting of an upper computer so as to simulate the conditions of abnormal driving of the bypass contactor of the power unit module or abnormal occurrence of a single power device;
the unit simulation module LU_SIM generates a water leakage sensor feedback signal according to the electronic characteristics of the water leakage alarm detection driving sensor according to the setting of the upper computer, and sends the water leakage sensor feedback signal to the state feedback signal interfaces of the water leakage alarm sensors of the four unit control modules LU-A, LU-B, LU-C and LU-D so as to simulate the abnormal situation of the water leakage sensor of the power unit module;
the unit simulation module LU_SIM generates an energy taking power supply abnormality fault signal according to the electronic characteristics of the energy taking power supply abnormality feedback signal on the unit according to the setting of the upper computer, and sends the energy taking power supply abnormality fault signal to the unit control module energy taking power supply abnormality feedback signal interface so as to simulate the situation when the energy taking power supply of the power unit module is abnormal;
the unit simulation module LU_SIM controls the power on/off of four unit control modules LU-A, LU-B, LU-C and LU-D according to the setting of the upper computer and the power on/off time sequence of the power taking power supply of the power unit so as to simulate the conditions of the power taking power supply of the power unit module when the power is on or off;
the unit simulation module LU_SIM generates an AD conversion chip signal output interface signal according to the interface time sequence of the AD chip on the actual unit simulation and control module so as to simulate the output signal time sequence of the AD conversion chip of the four unit control modules LU-A, LU-B, LU-C and LU-D.
2. The dynamic simulation experiment platform device for the electric power system according to claim 1, wherein the valve base controller structure is consistent with the valve base controller in the actual engineering of the electric power system in equal proportion, and is used for simulating the actual valve base controller, receiving a power unit capacitor voltage signal fed back by a real-time digital simulator, performing calculation of a core algorithm, and generating a driving pulse command of each power device in a simulation valve tower; and meanwhile, receiving an analog unit fault signal generated by each unit analog module, generating a bypass protection signal and a system control command signal required by a unit control module, calculating the switching value of a power device in a closed loop mode through a core algorithm, and providing a protection signal for a valve tower according to a valve body protection strategy when a valve breaks down.
3. The dynamic simulation experiment platform device for the electric power system according to claim 1, wherein the program module structure inside the unit simulation and control module comprises a unit control logic module, a simulation unit command analysis module and a data bus interface, wherein the simulation unit logic module receives and transmits data transmitted by the data bus interface, the data are divided into two formats of configuration data and control data, the configuration data are analyzed by the simulation unit command analysis module, the unit control logic module takes the received configuration data as parameters of unit faults, and the control data can set various faults in real time.
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| CN106774279A (en) * | 2017-01-23 | 2017-05-31 | 特变电工新疆新能源股份有限公司 | Converter valve control protective unit pilot system and method based on RTDS |
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