CN205178643U - Integrated device is observed and controled in protection - Google Patents

Abstract

The utility model discloses an integrated device is observed and controled in protection, include: MMI plug -in components, MMI plug -in components be used for accomplishing operation on the spot and with the communication on station accuse layer to the receipt comes from the interlocking information on station accuse layer, sends and observes and controls CPU, is used for realizing allying oneself with the shutting function, the NPI plug -in components, sample data and the GOOSE information that comes from the process layer is received to the NPI plug -in components, sends respectively and observe and control CPU and protection CPU for realize the protection and observe and control the function, protection CPU, protection CPU judges whether be the trouble through analysis received data, exports corresponding warning signal or tripping operation export information, observe and control CPU, observe and control CPU through analysis received data, through calculating output corresponding measurement, remote signalling information, the IO plug -in components for open and leave. Integrated device is observed and controled in protections such as the device can be used to intelligent substation 110kV and following electric pressure circuit, femalely allies oneself with, segmentation.

Description

Protection measurement and control integrated device

technical field

The utility model belongs to the technical field of electric power system relay protection and control, in particular to a new generation of intelligent substation automation system protection measurement and control integration device.

Background technique

Relay protection and measurement and control devices are important components of power systems, which play a very important role in ensuring the safe operation of the system. Especially in the intelligent substation automation system, the application of the IEC61850 standard and electronic transformers has new requirements for the protection and measurement and control devices of the bay layer.

In traditional substations, the integrated application of protection, measurement and control has been realized in systems with voltage levels of 35kV and below; while in power systems with high voltage levels, protection and measurement and control functions are realized by independent devices. In the construction of digital substations in recent years, integrated protection, measurement and control devices have appeared at voltage levels of 110kV and above, but most of them use a CPU to complete the protection and measurement and control functions at the same time. Any parameter, configuration or hardware damage of any function will cause the loss of both functions at the same time, and the reliability of the equipment cannot meet the operation requirements.

In the new generation of smart substations with the technical characteristics of "reasonable structural layout, highly integrated system, advanced technical equipment, economy, energy saving and environmental protection, and integrated support and regulation", in order to meet the requirements of high The requirements for construction, operation and maintenance of maintenance, comprehensive support for the integration of regulation and control, and the transformation of the development mode of the power grid have been proposed. A scheme for the integration of system protection and measurement and control devices for voltage levels of 110kV and below is proposed.

Utility model content

The purpose of the utility model is to provide a protection, measurement and control integration device to realize the integration of the protection device and the measurement and control device of the 110kV and below voltage level system in the intelligent substation.

An integrated protection, measurement and control device, comprising:

MMI plug-in, MMI plug-in is used to complete the local operation and communication with the station control layer, and receive the interlock information from the station control layer, send it to the measurement and control CPU to realize the interlocking function; NPI plug-in, the NPI plug-in receives from the process Layer sampling data and GOOSE information are sent to the measurement and control CPU and protection CPU respectively to realize the protection and measurement and control functions; the protection CPU analyzes the received data to determine whether it is a fault, and outputs a corresponding alarm signal or trips the exit information, and send the information to the station control layer and the process layer through the man-machine interface MMI plug-in and the process layer NPI plug-in; the measurement and control CPU, the measurement and control CPU analyzes the received data, outputs the corresponding measurement and remote signaling information through calculation, and passes MMI plug-ins and NPI plug-ins send information to the station control layer and process layer; I/O plug-ins are used for input and output.

The remote control command issued by the station control layer is sent to the measurement and control CPU through the MMI plug-in. Through its remote control function, the interlocking state is judged, and the remote control command is sent to the smart terminal through the NPI plug-in to realize the remote control of the circuit breaker and the switch.

The NPI plug-in completes the same protection startup logic as the protection CPU plug-in, and only after the protection starts, the GOOSE trip signal is allowed to be issued.

The multi-CPU structure is adopted, and the functions of each CPU are independent and cooperate with each other, which improves the function and processing capacity of the device, effectively guarantees the fast and reliable export of protection, the real-time online completion of remote measurement, and the fast processing and sending of remote signaling time. It also improves the anti-interference ability.

Supported by rich hardware resources, it ensures the high precision of remote measurement, and completes the calculation of active power, reactive power, power factor, etc. on the spot in real time, and completes the real-time accumulation of active energy and reactive energy, instead of Offline calculation at the station control layer.

It has powerful, convenient and easy-to-use supporting tools, which can support device development, project implementation, user configuration and other links at the same time. Firstly, the visual device design tool provides a device design environment, which facilitates the implementation of 61850 standard modeling in the initial stage of device development; secondly, the configuration tool ensures the standardization of the icd model; the virtual terminal tool facilitates the generation of device configuration files, At the same time, the waveform analysis tool clearly reproduces the action logic and sequence of each protection function element in the fault process through the relay protection logic diagram through the .des file.

Description of drawings

Figure 1 is a schematic diagram of a model of a protection measurement and control integrated device.

Figure 2 is a schematic diagram of the configuration of the process layer.

detailed description

A kind of protection measurement and control method of the present utility model mainly comprises:

The protection function and the measurement and control function are integrated on one device, which are completed by independent CPUs. The protection CPU provides main protection and backup protection functions, and the measurement and control CPU provides functions such as telemetry, remote signaling, remote control, synchronous closing, power metering, logic blocking, etc., and can be configured according to the specific needs of actual projects.

The processing of the human-machine interface is realized by a separate CPU, which ensures the convenience and independence of the operation, and also has the independence of communicating with different CPUs.

The protection CPU and the measurement and control CPU receive the sampling data and GOOSE information from the merging unit and the intelligent terminal through the optical fiber interface, and this function is realized by the process layer plug-in. The plug-in provides multiple optical fiber interfaces, and various data receiving modes can be realized through different configurations.

It can provide common local switch-in and switch-out for the protection CPU and the measurement and control CPU, and this function is realized by the I/O plug-in. The switch input provided by the plug-in can meet the setting of strong current switch input such as maintenance pressure plate, and the switch output can meet the output of failure, tripping and signal.

It can configure the local remote signal input dedicated to the measurement and control CPU, and this function is realized by the input plug-in.

The protection function and measurement and control function are concentrated on one device, which reduces the number of devices in the substation, simplifies the secondary wiring and switch ports for the station control layer and process layer network, and cancels the corresponding DC, signal and timing wiring.

The protection measurement and control integrated device has multiple Ethernet communication interfaces for different purposes, which satisfies the communication with the station control layer and the process layer, adapts to the transmission of different types of data, and realizes the communication and logic interlocking functions of the station control layer. At the same time, the device has multiple optical fiber communication ports for receiving process layer sampling data and GOOSE information for calculation of protection and measurement and control logic. The device sends protection action signals and measurement information to the station control layer through the Ethernet communication port of the station control layer, and at the same time sends GOOSE messages to the process layer through the optical fiber communication port of the process layer to realize signal transmission and protection tripping functions.

The protection function and the measurement and control function are respectively implemented by independent CPU boards. The damage of the measurement and control board does not affect the function of the protection board, which ensures the relative independence of the protection and measurement and control functions. It not only provides reliable protection functions, but also ensures Accurate measurement and control function.

The devices have good interoperability. The protection and measurement and control units are modeled according to the IEC61850 series standards, which ensures the consistency of information model application, communication service application, communication service mapping and communication protocol stack implementation.

For the flexibility of process layer data processing, different strategies can be adopted for different modes of process layer data transmission in smart substations. While meeting the requirements of the networking mode of the measurement and control function, for the protection function module, it supports the following different communication modes: SV direct acquisition and GOOSE direct jump mode, SV process layer network reception and GOOSE network trip mode, SV/GOOSE and station The three-layer one-network mode of the control layer sharing the network; for the direct mining and jumping mode, it supports not only the case of SV and GOOSE independent network ports, but also the case of SV and GOOSE common ports.

The process layer plug-in processor also completes the protection start logic consistent with the protection CPU plug-in, and only when the protection is started, the GOOSE trip signal is allowed to be issued.

It supports the monitoring of the status of receiving and receiving light intensity of NPI plug-in optical fiber communication at the process layer, and can intuitively indicate the status of the physical communication link of the device, so as to meet the condition-based maintenance requirements of in-situ relay protection devices in smart substations.

The realization of protection and measurement and control is established on a unified software and hardware platform, which provides convenience for the realization, management, upgrade and maintenance of programs.

The time synchronization methods are diversified. The protection measurement and control device supports IRIG-B code time synchronization, second/minute pulse time synchronization, and IEEE1588 time synchronization. The device itself has the function of judging and selecting the clock source, which ensures the accuracy of time synchronization and meets the requirements of "reliable operation under extreme conditions" of the smart grid.

The principle structure of the protection measurement and control integrated device is shown in Figure 1: it mainly includes man-machine management MMI plug-in, protection CPU plug-in, measurement and control CPU plug-in, process layer NPI plug-in, I/O plug-in and configurable optical B code time synchronization plug-in.

The device also includes a power plug-in, a backplane, a liquid crystal and a panel button, and the like.

Man-machine management MMI plug-in completes the function of man-machine dialogue, adopts WINDOWS-like menu, and provides flexible and humanized operation interface. The protection module and the measurement and control module have independent man-machine dialogue menus. The backplane communicates with the measurement and control CPU and the protection CPU through two Ethernet buses, receives the electrical B code or the time synchronization signal from the optical B code time synchronization plug-in, and downloads them to the protection CPU, measurement and control CPU, and process layer NPI plug-in respectively. Send a time synchronization pulse to ensure the time synchronization function of the device. This plug-in has the function of detecting whether the number of CPU plug-ins is correct. When the number of registered CPUs does not match the setting, it will output an alarm message, but it can still maintain the function of communicating with the normal CPU plug-in. The plug-in provides 3 Ethernet interfaces, which can realize the communication with the station control layer, and at the same time support the GOOSE sending and receiving function of the receiving station control layer network, so as to realize the measurement and control logic interlocking function.

The protection and measurement and control CPU plug-ins independently complete the protection and measurement and control functions. The two CPUs are relatively independent and have information such as fixed values, fixed value areas, soft pressure plates, and parameters that can be independently adjusted. The two plug-ins have exactly the same hardware structure and software platform. The advantages are convenient maintenance and independent functions.

The process layer NPI plug-in receives information from the process layer through the optical port, including SV sampling data from the merging unit and GOOSE information from the intelligent terminal, and communicates with the measurement and control and protection CPUs on the backplane through two Ethernet buses. At the same time, the GOOSE output of the protection CPU and the measurement and control CPU are sent to the process layer network according to different groups. The protection, measurement and control CPU sends resampling pulses to the process layer NPI plug-in through the Ethernet bus, resamples the SV sampling data from the process layer merging unit, and generates sampling data of different frequencies to support the different requirements of protection and measurement and control functions. The plug-in can provide multiple optical ports and support the configuration of various communication modes. Each optical port adopts a pluggable independent optical module, which facilitates the realization of different configurations and facilitates hardware maintenance and replacement.

At the same time, the process layer NPI plug-in selects a photoelectric conversion module with its own optical fiber transceiver power, and the operating environment temperature can reach above 85°C, and can self-test parameters such as transceiver optical power, operating voltage, and operating temperature of the core part of the device. The software module for protecting the CPU plug-in is added to read the real-time operating parameters of the optical module, and convert the optical transceiver power (in mW) into a more readable light intensity (in dB), which is displayed on the LCD and expands the IEC61850 logical node The model is sent to the monitoring system.

As the interface of the I/O data of the device, the I/O plug-in has the functions of local input and output, and completes the hard pressing board and signal acquisition, and controls the hard output. The plug-in communicates with the NPI plug-in of the process layer through the data bus, and the NPI plug-in obtains information such as the hard press plate in the form of GOOSE reception, and sends it to the protection CPU and the measurement and control CPU.

The panel provides a debugging Ethernet port, supports functions such as model export and configuration writing, and can simultaneously access the man-machine management MMI plug-in, protection CPU plug-in, measurement and control CPU plug-in and process layer NPI plug-in. Among them, the station control layer configuration file is stored in the MMI plug-in to realize the communication of the station control layer. The same process layer configuration file is stored in the protection CPU plug-in, measurement and control CPU plug-in and process layer NPI plug-in, so as to realize the sending and receiving of process layer data. For the convenience of project configuration, the protection CPU and the measurement and control CPU use the same process layer configuration file. The configuration method and implementation are shown in Figure 2: the SV and GOOSE of the NPI plug-in receive the information of the process layer according to the configuration, and send frames to the two according to the configuration sequence. Each Ethernet port, each CPU decides what content is required according to the corresponding configuration information.

The protection, measurement and control integration device provided by the utility model can be applied to devices requiring protection, measurement and control integration, such as intelligent substation 110kV and below voltage level lines, bus couplers/sections, and the like.

Claims (1)

1. A protection, measurement and control integrated device, characterized in that it comprises: MMI plug-in, MMI plug-in is used to complete the local operation and communication with the station control layer, and receive the interlock information from the station control layer, and send it to the measurement and control CPU to realize the interlocking function; NPI plug-in, the NPI plug-in receives sampling data and GOOSE information from the process layer, and sends them to the measurement and control CPU and protection CPU respectively to realize protection and measurement and control functions; Protect the CPU, the protection CPU judges whether it is a fault by analyzing the received data, outputs the corresponding alarm signal or trip exit information, and sends the information to the station control layer and the process layer through the man-machine interface MMI plug-in and the process layer NPI plug-in; Measurement and control CPU, the measurement and control CPU analyzes the received data, outputs the corresponding measurement and remote signaling information through calculation, and sends the information to the station control layer and process layer through the MMI plug-in and NPI plug-in; I/O plug-in for input and output.