CN105489080A - Metering system simulation platform - Google Patents

Abstract

The invention discloses a metering system simulation platform, which includes a simulation platform, a local area network and a control center. At least two of the simulation platforms are connected to a computer through a local area network and a switch; Loop simulation device, transformer wiring simulation device, transformation electric acquisition simulation device, low-voltage collection simulation device, digital program-controlled power supply and general control center, and form a star connection with the general control center as the center, and the general control center is connected through network cables and Or wirelessly connected to the computer, the total control center is the processor, the present invention meets the installation, debugging, testing and maintenance training of various metering equipment, and at the same time, the on-site control environment is moved indoors so as to be suitable for the on-site metering work in the current work position. Simulation, experimentation and training capabilities.

Description

Metering system simulation platform

Technical field:

The invention relates to a simulation platform, in particular to a measurement system simulation platform.

Background technique:

With the progress of science and technology and the change of energy development pattern, the dependence of economic and social development on electric energy is increasing. Relying on modern information, communication and control technology to actively develop smart grid and realize the transformation of grid development mode has become an active response of the international power industry. A common choice for future challenges. The future smart grid will realize the informatization and intelligence of power grid operation and control, so as to improve the energy structure and utilization efficiency, meet the various needs of power applications, and improve the economy, safety and reliability of power transmission. In order to achieve rapid market response, fair and accurate measurement, timely data collection, and convenient and efficient services, a new type of power supply and consumption relationship between smart grids and power users' power flows, information flows, and business flows is constructed in real time to meet the needs of all levels and professions of power companies. In response to the urgent need for electricity consumption information, China has begun to fully promote the construction of electricity consumption information collection systems in accordance with unified technical standards and programs.

With the continuous deepening of the reform of the electricity market, the collection method of electricity consumption information of residential users has also undergone great changes. The method of manual meter reading and charging can no longer meet the requirements of modern management. Schedule, remote centralized meter reading technology has become a research hotspot at home and abroad. From the 1990s to the present, power companies have established power information collection systems for different types of users according to business development needs, such as: power load management system, customer power collection system, low-voltage centralized meter reading system and distribution automation system, etc. , It has paved the way for the country to build a "big marketing" system and a smart grid environment.

The construction of smart grids, especially the popularization of new electricity consumption information collection systems, has resulted in the need for measurement practitioners to improve their skills in measurement and collection systems to adapt to the pace of development of the power industry. There are very few integrated training platforms, so that measurement practitioners cannot receive systematic skill training. In order to meet the requirements of employees integrating multiple skills and integrated skills in the smart grid environment, a new set of multiple measurement acquisition systems has been developed. A complete measurement system simulation platform has become a top priority.

In order to enable employees to adapt to the role change as soon as possible, meet the technical requirements of the new measurement function, and improve the comprehensive professional quality of all employees, a new type of training platform is urgently needed for employee training. After investigation, it is found that the existing products on the market have relatively single functions, and most of them are simulation training equipment of traditional technology. There is no simulation training for new technologies and new measurement equipment that have entered the field of power metering in recent years. Therefore, it is necessary to conduct research and development to meet the installation, commissioning, testing, and maintenance training of smart energy meters, collection terminals, digital energy meters and other equipment. At the same time, some on-site control environments are moved to the laboratory for practical training. Multifunctional metrological simulation training device for training.

Invention content:

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a comprehensive system equipment for experimenting and training various measuring equipment in multiple environments, and at the same time move the on-site control environment indoors to facilitate personnel training Expanded metering system simulation platform.

The technical scheme of the present invention is: a metering system simulation platform, including a simulation platform, a local area network and a control center, at least two of the simulation platforms are connected to a computer through a local area network and a switch; the simulation platform includes a substation metering simulation device, a metering circuit Miswiring device, low-voltage circuit simulation device, transformer wiring simulation device, transformation power collection simulation device, low-voltage collection simulation device, digital program-controlled power supply and general control center, and form a star connection with the general control center as the center. The general control center is connected to the computer through a network cable or wirelessly, and the general control center is a processor.

The digital program-controlled power supply includes a power supply box, a power amplifier box and an output switching box. After the high-voltage power is processed by the power supply box and the power amplifier box, it is connected to the output switching device. connect.

The substation metering simulation device includes a merging unit, a digital electric energy meter, a digital electric energy meter detector and a substation electric quantity acquisition device, and the digital electric energy meter, the substation electric quantity acquisition device and the merging unit are all connected to the general control center, and the substation electric quantity acquisition device It is connected with the digital electric energy meter and the merging unit, the digital electric energy meter is connected with the digital electric energy meter detector, and the merging unit is connected with the digital program-controlled power supply.

The digital electric energy meter detector includes a digital signal input and output module, a data processing module, a man-machine exchange module, a pulse input and output module and a communication module, and is connected to each other, and the digital signal input and output module is connected to the merging unit and the digital connected to the electric energy meter, and the digital electric energy meter is connected to the pulse input and output module.

The metering circuit miswiring device includes a switching box, an active energy meter, a reactive energy meter and a communication converter, the switching box is connected to the active energy meter, the reactive energy meter, a communication converter and a digital program-controlled power supply, and the communication converter is connected to the total Control Center connection.

The low-voltage circuit simulation device includes a meter master switch, a serial household failure setting box, a single-phase smart energy meter, an air switch for entering households, and a load indicator light. The setting box includes an output terminal and an input terminal. There are at least two shunts between the output end and the input end. On each shunt, an incoming air switch and a single-phase smart energy meter are sequentially set from the input end to the output end. Each The outputs are all connected to adjustable load boxes and indicator lights.

The transformer wiring simulation device includes a current transformer, a voltage transformer and a three-phase transformer energy meter, and the current transformer and the voltage transformer are connected with the three-phase transformer energy meter and a digital program-controlled power supply, and the current transformer and the digital An AC contactor is arranged between the program-controlled power supplies.

The simulated device for collecting transformed electricity includes a smart electric energy meter, a load control terminal and an analog circuit breaker, the intelligent electric energy meter, the load control terminal and the digital program-controlled power supply are connected to each other, the analog circuit breaker is set in the load control terminal, and the load control terminal is connected to the total Control Center connection.

The low-voltage collection simulation device includes a single-phase intelligent electric energy meter, a single-phase intelligent carrier electric energy meter, a collector and a low-pass filter, one end of the low-pass filter is connected to a digital program-controlled power supply, and the other end is provided with five output ports, and Each output port is equipped with a single-phase smart energy meter, a single-phase intelligent carrier energy meter and a collector. There are indicator lights on the single-phase smart energy meter and a single-phase intelligent carrier energy meter, and the collector is connected to the single-phase smart energy meter. .

The beneficial effects of the present invention are:

1. The present invention satisfies the installation, commissioning, testing, and maintenance training of various metering equipment, and at the same time moves the on-site control environment indoors so as to be suitable for on-site simulation, experiment and training functions in current metering jobs.

2. The present invention uses the computer module design idea for reference, uses the digital program-controlled power supply and the local area network as the bus system of the entire simulation platform, thereby simulates the on-site operating environment and collection channels of various metering equipment, and uses each type of simulation training content as a functional module , connected to the bus system through the control switch, each functional module can run independently for simulation training without interfering with each other, and can also run together for joint simulation training of multiple functions.

3. The present invention adopts a digital load power supply, which can provide standard high-precision voltage and current output, and has a safety protection function. Once an electric shock occurs to the human body, the voltage and current will be automatically reduced, and an alarm signal will be sent to ensure the use of the equipment. personnel safety.

4. The present invention is connected to the corresponding power automation system master station in actual operation through the optical fiber private network or GPRS/CDMA wireless public network, and the workstations of each power automation system can check and patrol the data of each metering device collected on the simulation platform. Real-time data can also be used for remote operation of metering equipment on the simulation platform.

5. In order to prevent the high-frequency carrier from interfering with the normal operation of the digital program-controlled power supply, the present invention installs a low-pass filter on the outlet side of the digital program-controlled power supply to prevent high-frequency carrier signals from entering the digital program-controlled power supply.

6. The present invention has the accuracy inspection function of the digital electric energy meter. With the help of the on-site calibration instrument, the accuracy inspection of the merging unit and the comprehensive accuracy inspection function of the merging unit and the digital electric energy meter can be realized. This function is also the first time that this function has appeared on the simulation platform in China .

7. The present invention is equipped with the experiment of the digital metering circuit of the smart substation, the simulation of the field environment and the analysis of the physical quantity. It not only solves the problem that the metering personnel do not know what information is transmitted between the merging unit and the digital electric energy meter, and whether the content of the information is correct. It can also help, guide and train the measurement staff to understand the working conditions of this part of the equipment by analyzing the physical quantities and data in the measurement circuit.

8. The present invention has high-voltage voltage and current transformer V-type and Y-connection simulation, and simulates the measurement secondary circuit environment of substations and high-voltage users through transformers with special transformation ratios, and provides experiment and training functions.

9. The present invention has the functions of remote measurement, remote control, remote signaling simulation, experiment, training and other functions of the special transformer terminal; it has the simulation of multiple carrier module communication modes and 485 communication mode of the low-voltage residential electric mining system.

Description of drawings:

Figure 1 is a structural block diagram of the metering system simulation platform.

Figure 2 is a structural block diagram of the simulation platform.

Fig. 3 is a structural block diagram of a substation metering simulation device.

Fig. 4 is a structural block diagram of a metering circuit miswiring device.

Fig. 5 is a structural block diagram of a low-voltage centralized copying simulation device.

Fig. 6 is a structural block diagram of a low-voltage loop simulation device.

detailed description:

Embodiment: see Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6.

The metering system simulation platform includes a simulation platform, a local area network and a control center, and at least two of the simulation platforms are connected to a computer through a local area network and a switch; the simulation platform includes a substation metering simulation device, a metering circuit miswiring device, a low-voltage circuit simulation device, and a transformer The wiring simulation device, the transformation electric collection simulation device, the low-voltage collection simulation device, the digital program-controlled power supply and the general control center form a star connection with the general control center as the center, and the general control center is connected to the computer through a network cable or wirelessly. The total control center is the processor.

The digital program-controlled power supply includes a power supply box, a power amplifier box and an output switching box. After the high-voltage power is processed by the power supply box and the power amplifier box, it is connected to the output switching device. The output switching device is provided with an output interface, and is connected to the main control center through the RS232 interface.

The substation metering simulation device includes a merging unit, a digital electric energy meter, a digital electric energy meter detector and a substation power acquisition device. The digital electric energy meter, the substation power The electric energy meter is connected with the merging unit, the digital electric energy meter is connected with the digital electric energy meter detector, and the merging unit is connected with the digital program-controlled power supply.

The digital electric energy meter tester includes a digital signal input and output module, a data processing module, a man-machine exchange module, a pulse input and output module and a communication module, and they are connected to each other. Meter connection, the digital energy meter is connected with the pulse input and output module.

The metering circuit miswiring device includes switch box, active energy meter, reactive energy meter and communication converter. The switch box is connected with active energy meter, reactive energy meter, communication converter and digital program-controlled power supply. connect.

The low-voltage circuit simulation device includes the main switch of the electric meter, the serial household fault setting box, the single-phase intelligent electric energy meter, the household air switch and the load indicator light, the electric meter main switch is connected with the serial household fault setting box and the digital program-controlled power supply, and the serial household fault setting box Including the output end and the input end, at least two shunts are set between the output end and the input end, and each shunt is set in sequence from the input end to the output end with an air switch and a single-phase smart energy meter. Both are connected with adjustable load boxes and indicator lights.

The transformer wiring simulation device includes a current transformer, a voltage transformer and a three-phase transformer electric energy meter. There is an AC contactor between them.

The simulation device for transforming power collection includes smart electric energy meters, load control terminals and analog circuit breakers. The intelligent electric energy meters, load control terminals and digital program-controlled power supply are connected to each other. connect.

The low-voltage collection simulation device includes a single-phase smart energy meter, a single-phase smart carrier energy meter, a collector and a low-pass filter. One end of the low-pass filter is connected to a digital program-controlled power supply, and the other end is provided with five output ports, and there is no The output ports are equipped with a single-phase smart energy meter, a single-phase intelligent carrier energy meter and a collector, the single-phase smart energy meter and the single-phase intelligent carrier energy meter are provided with indicator lights, and the collector is connected to the single-phase smart energy meter.

In the substation metering simulation device: (1), the AC module of the merging unit receives the secondary analog voltage and current of the system, and transmits the digital quantity to the digital electric energy meter through the SV output module through the special optical fiber for metering, so as to realize electric energy metering, digital The type electric energy meter is connected with the power collection device through RS-485 to realize electric power remote transmission.

(2) Add a digital electric energy meter detection instrument to the simulation module, connect the SV output of the merging unit to the optical fiber input module of the digital electric energy meter detection instrument through an optical fiber, and transmit the digital signal from the optical signal output module through a signal transponder Forwarded to digital energy meter. Through the digital quantity analysis of the digital energy meter detection instrument, the metering voltage and current signals in the SV output signal of the merging unit are analyzed into analog quantities, which are intuitively displayed in the form of data, waveform and vector diagram respectively in the digital energy meter detection instrument Come out to realize the analysis and monitoring functions of metering voltage and current signals.

(3) Connect the pulse output of the digital electric energy meter to the pulse input module of the digital electric energy meter detection instrument, and the digital electric energy meter detection instrument calculates the pulse output of the electric energy meter by comparing the pulse of the digital electric energy meter with the digital signal of the merging unit The error, so as to realize the precision detection of the digital electric energy meter under the condition of real load on site. And the test report can be output in the form of a report, saved in the digital electric energy meter test instrument or output to an external U disk.

(4) The optical signal output module of the digital watt-hour meter detection instrument outputs a message conforming to the IEC61850 standard according to the manually set voltage, current and phase angle signals, and connects to the digital watt-hour meter. Through the set detection scheme, the accuracy of the digital energy meter under different voltage and current conditions can be detected in the laboratory environment.

(5) The digital electric energy meter detection instrument converts the received optical signal into a high-frequency pulse through the pulse output module, and connects the pulse signal to the traditional electric energy meter field calibrator, and the traditional electric energy meter calibrator sampling and merging unit The input voltage and current analog quantities can realize the function of using the on-site electric energy meter calibrator to verify the accuracy of the combined unit.

In the wrong wiring device of the metering circuit: the power supply is a three-phase power supply, and the phase and amplitude of each phase can be controlled separately. Output, the voltage output of the power supply is a three-phase isolated output type, so as to select different ground terminals; the switch box is a functional module that completes phase failure, grounding, short circuit, and phase error of voltage and current; Energy meters are set up to simulate field wiring for various operations.

Transformer wiring simulation device: It can simulate the operating environment of the high-voltage transformer electric energy meter (voltage 0-380V, current 0-100A), and the AC contactor plays the role of converting large current, better protecting the safety of other modules, current The transformer adopts 100/5A, 0.5-level through-hole transformer, highly simulates the scene, and the voltage transformer adopts 380/100V transformation ratio, which can realize both V-type connection and Y-type connection.

Transformation electricity acquisition simulation device: (1), the digital program-controlled power supply provides working voltage for the three-phase four-wire (or three-phase three-wire, depending on the connected electric energy meter) electric energy meter and load collection terminal, and the programmable power supply can also output The current of the specified size is used to drive the smart electric energy meter for electric energy measurement, simulating the special transformer electric energy metering device.

(2) The load control terminal can communicate with the smart energy meter through the 485 line, regularly collect the frozen electricity of the energy meter, and upload the collected energy information to the general control center and computer to complete the remote transmission of electricity.

(3) The load control terminal receives the instructions issued by the computer and the general control center, and performs load control according to the instructions of the master station of the power consumption information collection system, issues a trip command to the circuit breaker, and sends out an alarm message through the sound and light alarm.

(4) When remotely tripping and closing the electric energy meter for the special substation on the simulation platform, the secret key can be called through the main station of the electrical information collection system, and the computer sends encrypted instructions to the load control terminal through the wireless public network channel, and the load control terminal After analysis, the secret key is forwarded to the smart energy meter through the 485 line, thereby completing the tripping and closing functions of the energy meter encrypted uniformly by the State Grid, thereby realizing power control and cost control functions.

In the low-voltage centralized reading simulation device: (1), the digital program-controlled power supply provides the working voltage and working current for the single-phase electric energy meter, which is used to simulate the electric energy metering device of the low-voltage user.

(2) The collector is connected to the single-phase smart energy meter through the RS-485 line; it communicates with another single-phase carrier energy meter through low-voltage carrier.

(3) The collector regularly collects the frozen power of the electric energy meter according to the configuration information, and uploads the collected electric energy information to the general control center and computer to complete the remote transmission of electric power.

(4) The simulation platform can be used for remote meter reading through the intranet computer, and the electricity information master station issues meter reading commands to the simulation platform according to user instructions. After receiving the instructions, the collector selects 485 or 485 according to different meter addresses. Carrier way to complete the meter reading, and upload the meter reading information to the computer.

(5) The single-phase electric energy meter tripping and reclosing operations require a special key, so the remote reclosing operation can only be issued through the master station of electricity information; when the master station of electricity information receives the remote When the tripping and reclosing instructions are issued, the master station retrieves the key from the key database according to the address of the trip table, and then sends an encrypted instruction to the collector through the public network channel. The secret key is forwarded to the smart energy meter, thereby completing the tripping and closing functions of the energy meter encrypted uniformly by the State Grid, thereby realizing the cost control function.

In the digital program-controlled power supply: the waveform synthesis module adopts digital waveform synthesis technology to ensure the stability of the power output; the power amplification plays the role of amplifying the output power to meet the needs of different power; the output switch is used to output a variety of ranges to meet the needs of the site Multi-range requirements; contact and coordinate through the general control center and computer, thus ensuring the reliability and stability of the power supply.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to within the scope of the technical solutions of the present invention.

Claims (9)

1. A metering system simulation platform, comprising a simulation platform, a local area network and a control center, is characterized in that: at least two of the simulation platforms are connected with a computer through a local area network, a switch; The wiring device, the low-voltage circuit simulation device, the transformer wiring simulation device, the transformation electric collection simulation device, the low-voltage collection simulation device, the digital program-controlled power supply and the general control center, and form a star connection with the general control center as the center. The general control center is connected to the computer through a network cable or wirelessly, and the general control center is a processor. 2. The metering system simulation platform according to claim 1, characterized in that: the digital program-controlled power supply includes a power supply box, a power amplifier box and an output switching box, and the high-voltage power is connected to the output switching device after being processed by the power supply box and the power amplifier box , the output switching device is provided with an output interface, and is connected to the general control center through the RS232 interface. 3. The metering system simulation platform according to claim 1, characterized in that: the substation metering simulation device includes a merging unit, a digital watt-hour meter, a digital watt-hour meter detector and a substation electricity collection device, a digital watt-hour meter, Both the substation power collection device and the merging unit are connected to the general control center, the substation power collection device is connected to the digital electric energy meter and the merging unit, the digital electric energy meter is connected to the digital electric energy meter detector, and the merging unit is connected to the digital program-controlled power supply. 4. The metering system simulation platform according to claim 3, characterized in that: the digital electric energy meter detector includes a digital signal input and output module, a data processing module, a man-machine exchange module, a pulse input and output module and a communication module, The digital signal input and output modules are connected to the merging unit and the digital electric energy meter through optical fibers, and the digital electric energy meter is connected to the pulse input and output module. 5. The metering system simulation platform according to claim 1, characterized in that: the metering circuit miswiring device includes a switching box, an active energy meter, a reactive energy meter and a communication converter, and the switching box and the active energy meter, reactive energy meter The functional electric energy meter, the communication converter and the digital program-controlled power supply are connected, and the communication converter is connected with the general control center. 6. The metering system simulation platform according to claim 1, characterized in that: the low-voltage circuit simulation device includes a meter master switch, a serial household fault setting box, a single-phase smart energy meter, an air switch for entering a household, and a load indicator light, The main switch of the ammeter is connected to the serial household fault setting box and the digital program-controlled power supply. The serial household fault setting box includes an output terminal and an input terminal. There are at least two shunts between the output end and the input end. The output terminals are all set in turn with the entrance air switch and the single-phase smart electric energy meter, and each output terminal is connected with an adjustable load box and an indicator light. 7. The metering system simulation platform according to claim 1, characterized in that: the transformer wiring simulation device includes a current transformer, a voltage transformer and a three-phase transformer electric energy meter, and the current transformer and the voltage transformer are all connected with each other. The three-phase inductor electric energy meter is connected to the digital program-controlled power supply, and an AC contactor is arranged between the current transformer and the digital program-controlled power supply. 8. The metering system simulation platform according to claim 1, characterized in that: said transition electricity acquisition simulation device includes a smart electric energy meter, a load control terminal and an analog circuit breaker, and the intelligent electric energy meter, the load control terminal and the digital program-controlled power supply are connected to each other Connection, the simulated circuit breaker is set in the load control terminal, and the load control terminal is connected with the general control center. 9. The metering system simulation platform according to claim 1, characterized in that: said low-voltage centralized reading simulation device includes a single-phase smart energy meter, a single-phase smart carrier energy meter, a collector and a low-pass filter, and the low-pass filter One end of the device is connected to the digital program-controlled power supply, and the other end is provided with five output ports, and each output port is equipped with a single-phase intelligent energy meter, a single-phase intelligent carrier energy meter and a collector, a single-phase intelligent energy meter and a single-phase intelligent energy meter. The carrier electric energy meter is provided with an indicator light, and the collector is connected with the single-phase intelligent electric energy meter.