CN212518539U

CN212518539U - Intelligent direct-current protection measurement and control device

Info

Publication number: CN212518539U
Application number: CN202021026941.XU
Authority: CN
Inventors: 刘永生; 侯炜; 陈俊; 李宇琦; 冯志翔
Original assignee: NR Electric Co Ltd; NR Engineering Co Ltd
Current assignee: NR Electric Co Ltd; NR Engineering Co Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-09
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses an intelligence direct current protection measurement and control device, a serial communication port, measurement and control device includes host computer module and liquid crystal module, host computer module with liquid crystal module carries out the information interaction through data line or wireless transceiver module, host computer module contains protection component, communication subassembly, division subassembly, sampling subassembly, power supply module and digital subassembly, carries out data transmission through the backplate bus between each subassembly, wherein, digital subassembly provides the interface that inserts the process layer network of digital transformer substation, thereby makes measurement and control device can carry out information exchange with other secondary power equipment. The support of the digital module improves the rapidity and the reliability of information transmission between secondary devices; the load dynamic monitoring function is provided, and reference is provided for reasonable load allocation; and the adoption of a visual configuration development mode improves the development completion efficiency.

Description

Intelligent direct-current protection measurement and control device

Technical Field

The utility model belongs to the technical field of electric power system and track traffic, concretely relates to intelligence direct current protection measurement and control device.

Background

Until now in the end of the 19 th century, ac systems have been the mainstream of power supply systems instead of dc systems because they have advantages such as the ability to perform voltage conversion conveniently. However, with the rapid progress of power electronic technology, the gradual increase of the proportion of new dc energy, and the increasing of the energy saving requirement of the terminal, the dc power is more and more emphasized by the medium and low voltage power supply system due to the characteristics of low loss and high quality. The method is successfully applied to the fields of rail transit traction, ship power supply, medium and low voltage distribution networks and the like. The direct current protection measurement and control device is used as an important component of a direct current power supply system, and provides powerful guarantee for safe and stable operation of the direct current power supply system. When the power supply system normally operates, the direct current protection measurement and control device collects and monitors the system information in real time and records the system operation state; when the power supply system is in fault or abnormal, the direct current protection measurement and control device automatically cuts off fault equipment from the system in the shortest possible time and the smallest possible area.

With the continuous development of science and technology, new requirements of operators on the direct current protection measurement and control device continuously emerge, the limitations of the traditional direct current protection measurement and control device become more and more prominent, and the limitations are mainly embodied in the following aspects:

1. in recent years, rapid development of computers, robots and image recognition technologies has promoted operation and maintenance of power supply systems towards unmanned and intelligent states, and direct-current protection measurement and control devices also face urgent requirements for intelligent transformation. However, the existing dc protection measurement and control device has a low level of intelligence, for example, the liquid crystal panel only supports manual triggering and awakening, the brightness and font displayed by the liquid crystal panel are fixed, the protection measurement and control device cannot be linked with an intelligent operation and maintenance system, and the like, and it is difficult to adapt to new requirements of future unmanned and intelligent operation and maintenance.

2. In the application of industries such as rail transit, direct current distribution network and the like, a large amount of switching value signals transmitted with other secondary equipment exist in a direct current protection measurement and control device, and a large amount of secondary cables are adopted in the traditional signal transmission. However, the transmission of the switching value signal through the secondary cable is not only complicated in wiring but also low in reliability, and may even affect the normal operation of the dc power supply system. For example, the cable channel is usually difficult to be discovered due to the abnormality, and when signals are transmitted through the cable, the risk that the signals cannot be timely detected and cannot be transmitted exists. Meanwhile, the distance for transmitting the electrical signal is limited and the anti-interference capability is poor, so that the stability for transmitting the electrical signal is poor, and data receiving errors may be caused. In the direct current system, because the fault current zero crossing point does not exist, the earlier the fault is cut off, and the better the protection of primary equipment can be realized. However, due to factors such as the time of the relay outlet and the switching-in anti-shake function, the time for the protection measurement and control device to transmit the joint-tripping signal through the secondary cable is long, the fault cutting time is directly prolonged, and the protection of primary equipment is not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intelligence direct current protection measurement and control device, through adopting intelligent liquid crystal, digital subassembly and load monitoring function etc. promotes operation personnel's work efficiency, reduces the time of direct current power supply system trouble excision, satisfies the new demands that new technologies such as intelligence fortune dimension proposed.

In order to achieve the above object, the present invention provides an intelligent dc protection measurement and control device, which is characterized in that the measurement and control device comprises a host module and a liquid crystal module, the host module and the liquid crystal module perform information interaction via a data line or a wireless transceiver module,

the host module comprises a protection component, a communication component, an input component, an output component, a sampling component, a power supply component and a digitization component, data transmission is carried out among the components through a backboard bus,

the digital component provides an interface for accessing a process layer network of the digital substation, so that the measurement and control device can exchange information with other secondary power equipment.

According to some embodiments, the information exchange includes a gang jump, a breaker position, and a voltage, current.

According to some embodiments, the liquid crystal module may support manual trigger wake-up, human movement detection wake-up, and intelligent operation and maintenance system linkage wake-up.

According to some embodiments, the awakened liquid crystal module can automatically adjust the brightness of the liquid crystal and the size of information display according to the ambient light intensity.

According to some embodiments, the measurement and control device is provided with an intelligent operation and maintenance interface, and the wireless signal transceiver module is accessed through the intelligent operation and maintenance interface, so that the measurement and control device can perform information interaction with an intelligent operation and maintenance system.

According to some embodiments, the intelligent operation and maintenance interface is disposed within the liquid crystal module or the host module.

According to some embodiments, the sampling component collects current and voltage of a direct current power supply system, and the measurement and control device records data collected by the sampling component according to a set time interval.

According to some embodiments, the measurement and control device is configured to determine the recorded data according to an overload criterion, and when the recorded data is determined to be overloaded, send out an overload warning signal.

According to some embodiments, the measurement and control device constructs a protection measurement and control function through a visual software configuration platform.

According to some embodiments, the visual software configuration platform can simulate actual working conditions and verify the constructed protection measurement and control functions.

The utility model has the advantages that:

(1) through adopting intelligent liquid crystal module, intelligent direct current protection measurement and control device has increased human body and has moved a plurality of contactless awakening modes such as detection awakening, intelligent fortune dimension system linkage awakening when keeping traditional manual trigger awakening. The awakened liquid crystal module can automatically adjust the display of information according to the field environment, and the friendliness of a human-computer interface is improved.

(2) Through the configured intelligent operation and maintenance interface, the intelligent direct-current protection measurement and control device can be highly integrated in an intelligent operation and maintenance system, and conditions and possibilities are provided for more advanced applications of intelligent operation and maintenance.

(3) The process layer network is accessed through the digital component, and information of the intelligent direct-current protection measurement and control device can be transmitted through the process layer network, so that signal transmission channels among secondary devices are reduced, and rapidity and reliability of information transmission are guaranteed.

(4) The intelligent direct current protection and measurement and control device has a load dynamic monitoring function, can track and record the load state of a power supply system, provides credible load monitoring data, and provides important reference for reasonably allocating loads for operators.

(5) By utilizing the visual software configuration platform, all functions of the intelligent direct-current protection measurement and control device can be simulated and verified in the development stage, the efficiency of development completion can be improved, and the probability of development errors is reduced.

Drawings

Fig. 1 is the utility model discloses an intelligence direct current protection measurement and control device schematic diagram.

Fig. 2 is the utility model discloses an intelligence direct current protection measurement and control device and intelligent fortune dimension system linkage schematic diagram.

Fig. 3 is the utility model discloses an intelligence direct current protection measurement and control device process layer network schematic diagram.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings.

Example one

Fig. 1 is a schematic diagram of an intelligent direct current protection measurement and control device. The intelligent direct current protection measurement and control device is used for direct current traction and protection of a power supply system, and comprises a host module 1 and a liquid crystal module 3 as shown in figure 1. The host module 1 and the liquid crystal module 3 are designed in a separated mode, are independent of each other, and carry out information interaction through the data line 2. In some embodiments, the host module 1 and the liquid crystal module 3 may also use a wireless transceiver module or the like for data transmission.

The host module 1 and the liquid crystal module 3 adopt a separated design, so that the intelligent direct-current protection measurement and control device can select two configuration modes of no liquid crystal and liquid crystal according to the space size of a secondary cabin of the direct-current switch cabinet. For the intelligent direct-current protection measurement and control device without the liquid crystal, operators can check device information through an in-station integrated automation system or a scheduling system. For the intelligent direct current protection measurement and control device with liquid crystal, information can be checked through the liquid crystal module 3, and the liquid crystal module 3 can be installed at any position.

The liquid crystal module 3 is an intelligent liquid crystal module with multiple awakening modes, and can support manual triggering awakening, human body movement detection awakening, intelligent operation and maintenance system linkage awakening and the like, and awakened liquid crystal can automatically adjust the brightness of the liquid crystal and the size of information display according to the light intensity of the environment.

The host module 1 includes a protection component, a communication component, an input component, an output component, a sampling component, a power supply component, a digitizing component, and the like. The protection component is used for finishing the protection operation and the functional logic of the intelligent direct current protection measurement and control device. The communication component is used for protecting information interaction between the measurement and control device and external platforms such as a background, scheduling and debugging software and the like. The opening component provides multiple opening quantities, and all the opening quantities enter the device and are isolated through optical couplers or magnetic couplers. The opening assembly provides a multiple opening amount, and comprises a quick release output port, an output port in the form of a photoelectric isolated relay idle contact and the like. The sampling assembly collects current, voltage and the like of the direct current power supply system, and the measurement and control device records data collected by the sampling assembly according to a set time interval. The power supply assembly is used for providing a working power supply for the intelligent direct current protection measurement and control device. The digital assembly provides an interface and a function for protecting the measurement and control device and accessing the intelligent transformer substation.

The components in the host module 1 are independent from each other, and data transmission is performed through a backplane bus. The number and type of the components can be adjusted according to actual requirements. In addition, the functions of a plurality of components may be separated or combined together.

The main machine module 1 adopts a design scheme of multi-component integration, and has the following beneficial effects: on one hand, the intelligent direct current protection measurement and control device can configure the number and the type of the components according to the actual needs of the engineering; on the other hand, when a certain component is abnormal, an operator can conveniently complete the replacement and the test of the component.

The protection and measurement functions of the intelligent direct-current protection and measurement device can be constructed through a visual software configuration platform. The visual software configuration platform can also verify the constructed functions, namely input information is simulated according to actual working conditions, the feasibility of the constructed functions is verified, risk points existing in the functions are found, an improvement proposal is given, the development completion efficiency is improved, and the development error probability is reduced. In some embodiments, the configuration platform may also be implemented by other software or programming modes that are not visualized.

Example two

The intelligent direct current protection measurement and control device supports an intelligent operation and maintenance interface, can be connected with the wireless signal receiving and sending module, and is used for interaction between the intelligent direct current protection measurement and control device and an intelligent operation and maintenance system. The intelligent direct current protection measurement and control device can quickly feed back the change of the direct current power supply system to the intelligent operation and maintenance system, and operators can check information provided by the intelligent direct current protection measurement and control device through terminal equipment of the intelligent operation and maintenance system. The following description will be made with reference to fig. 2.

Fig. 2 is a schematic view of the linkage between the intelligent dc protection measurement and control device and the intelligent operation and maintenance system 4. The intelligent operation and maintenance system linkage means that when the intelligent direct current protection measurement and control device acts or is abnormal, a data query request is sent to the intelligent operation and maintenance system 4 through the wireless transceiver module 6 or the data line 2 which is connected to the intelligent operation and maintenance interface. The intelligent operation and maintenance interface of the intelligent direct current protection measurement and control device can be arranged in the host module 1 or the liquid crystal module 3, as shown in fig. 2. After receiving the query request instruction, the intelligent operation and maintenance system 4 immediately sends the query instruction to the intelligent operation and maintenance terminal (operation and maintenance robot or operation and maintenance camera, etc.) 5, and notifies the operator of the occurrence of an abnormality. The intelligent operation and maintenance terminal 5 records abnormal information according to the requirements of the operators, and the operators can monitor and check the abnormal information.

EXAMPLE III

Fig. 3 is a schematic diagram of a process layer network of the intelligent direct-current protection measurement and control device. The process layer network switch is used for building a process layer network in the transformer substation, and information sharing among different stations is realized through cross-station cascading of the process layer network switch. The intelligent direct current protection measurement and control device realizes the exchange of information including joint tripping, breaker position, voltage, current and the like with other secondary power equipment through a process layer network.

Specifically, the digital component of the direct current protection measurement and control device is used as an interface component accessed to a process layer network to provide an independent interface. The digitizing component can provide multiple independent interfaces. The physical transmission channels among the devices in the process layer network adopt optical fibers, so that the anti-interference capability, the transmission distance and the transmission capacity of information transmission can be improved, the rapidity and the reliability of information transmission are ensured, and the number of the channels of the information transmission is reduced. The IEC61850 protocol adopted by the process layer data transmission has a broken link detection mechanism, can monitor the data transmission channel in real time, and can immediately send corresponding alarm information once the channel is interrupted, so that the reliability of data transmission is improved, and the time and cost invested by operators for secondary equipment maintenance are saved. In some embodiments, the connection channel between the intelligent dc protection measurement and control device and the process layer switch uses other media besides optical fiber.

Example four

As shown in fig. 1, a host module 1 of the intelligent dc protection measurement and control device includes a sampling component, and the sampling component can collect load information such as current and voltage of a dc power supply system. The measurement and control device can record the collected load information such as voltage, current and the like of the direct current power supply system according to a set time interval, draw a load report according to a set time section, and judge and send an overload early warning signal according to an overload standard.

In the prior art, an in-station integrated automation system or a scheduling system can acquire recorded data from a measurement and control device in a general calling mode. The utility model discloses utilize measuring and control device to record DC power supply system's load condition according to the time interval of setting for, solved in the station synthesize automatic system and dispatch system because of always calling the interval duration long, the poor problem of DC power supply system load data granularity that acquires that leads to provides important reference for load in operation personnel rational distribution and the dispatch power supply system.

In addition, the intelligent direct current protection measurement and control device can perform statistical analysis on the recorded load data, and draw a load report with the period of day, month and year for operators to inquire and compare. The intelligent direct current protection measurement and control device can also set a load out-of-limit threshold and time according to an overload standard. When the direct current power supply system is monitored to be in or be in an overload running state for a long time, the measurement and control device can send out an early warning signal, and operators can adjust the load in the power supply system according to actual conditions to prevent the direct current power supply system from being in or being in the overload running state for a long time.

The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. All according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope.

Claims

1. An intelligent direct current protection measurement and control device is characterized in that the measurement and control device comprises a host module and a liquid crystal module, the host module and the liquid crystal module carry out information interaction through a data line or a wireless transceiver module,

2. The intelligent dc protection measurement and control device according to claim 1, wherein the information includes a joint trip, a breaker position, and a voltage and a current.

3. The intelligent direct-current protection measurement and control device as claimed in claim 1, wherein the liquid crystal module can support manual triggering wakeup, human body movement detection wakeup, and linkage wakeup of an intelligent operation and maintenance system.

4. The intelligent direct-current protection measurement and control device as claimed in claim 3, wherein the awakened liquid crystal module can automatically adjust the brightness of the liquid crystal and the size of information display according to the light intensity of the environment.

5. The intelligent direct-current protection measurement and control device as claimed in claim 1, wherein the measurement and control device has an intelligent operation and maintenance interface, and a wireless signal transceiver module is accessed through the intelligent operation and maintenance interface, so that the measurement and control device can perform information interaction with an intelligent operation and maintenance system.

6. The intelligent direct-current protection measurement and control device according to claim 5, wherein the intelligent operation and maintenance interface is arranged in the liquid crystal module or the host module.

7. The intelligent direct-current protection measurement and control device according to claim 1, wherein the sampling component collects current and voltage of a direct-current power supply system, and the measurement and control device records data collected by the sampling component according to a set time interval.

8. The intelligent dc protection measurement and control device according to claim 7, wherein the measurement and control device is configured to determine the recorded data according to an overload standard, and when the recorded data is determined to be overloaded, send out an overload warning signal.

9. The intelligent direct-current protection measurement and control device according to claim 1, wherein the measurement and control device constructs protection measurement and control functions through a visual software configuration platform.

10. The intelligent direct-current protection measurement and control device according to claim 9, wherein the visual software configuration platform can simulate actual working conditions to verify the constructed protection measurement and control function.