CN216086166U - Distributed control high-voltage reactive automatic compensation system - Google Patents

Distributed control high-voltage reactive automatic compensation system Download PDF

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Publication number
CN216086166U
CN216086166U CN202122479170.0U CN202122479170U CN216086166U CN 216086166 U CN216086166 U CN 216086166U CN 202122479170 U CN202122479170 U CN 202122479170U CN 216086166 U CN216086166 U CN 216086166U
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voltage
circuit
reactive
detection circuit
controller
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郝莉
迟恩先
王德涛
鞠洪兵
杨军
陈杰
解丽英
刘建业
李昕
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Shandong Hoteam Electrical Co ltd
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Shandong Hoteam Electrical Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units

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Abstract

The utility model provides a distributed control high-voltage reactive automatic compensation system which comprises a controller, grouping measurement and control protection units and reactive compensation units, wherein each reactive compensation unit is connected with one grouping measurement and control protection unit, and the controller is in communication connection with the grouping measurement and control protection units. The controller of the embodiment is not directly connected with the reactive compensation unit, but is connected with the grouping measurement and control protection unit. Every reactive compensation unit is equipped with a grouping measurement and control protection unit, can realize compensation unit's extension, and branch road of an interface connection of controller, the connection of one-to-one can detect the trouble respectively to single branch road, can detect symmetrical trouble to the loaded down with trivial details problem of wiring has been solved.

Description

Distributed control high-voltage reactive automatic compensation system
Technical Field
The utility model relates to the technical field related to electrical control or regulation systems, in particular to a distributed control high-voltage reactive power automatic compensation system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the development of national economy, the requirement on the quality of electric energy is increasingly improved, and the demand on a high-voltage reactive automatic compensation device with an optimized control and accurate protection system is more urgent. At present, high-voltage reactive power compensation devices in a power distribution network have several forms, namely fixed capacitor compensation devices, grouping type automatic compensation devices, static reactive power compensation devices and static reactive power generators. The factors such as compensation effect, occupied area, device cost and stability are comprehensively considered, and the grouping type automatic compensation device is still a compensation mode with good compensation effect and economy. However, the grouping type high-voltage non-automatic compensation device is limited by a control mode and the number of interfaces, most manufacturers only have 6 branches or less compensation devices at present, so that the compensation precision is not high, and the improvement of a power factor and the voltage qualification rate is influenced; the grouping type high-voltage automatic compensation device has the defects that the protection mode does not reflect symmetrical faults, dead protection zones and the like, and the application range of the grouping type high-voltage reactive automatic compensation device is limited.
SUMMERY OF THE UTILITY MODEL
The utility model provides a distributed control high-voltage reactive automatic compensation system for solving the problems, solves the problems that the number of branches of a grouped high-voltage reactive automatic compensation device is limited by a controller control mode and an interface and wiring on a construction site is complex, reduces protection blind areas, can accurately make judgment when the device has a symmetrical fault, and reduces accidents.
In order to achieve the purpose, the utility model adopts the following technical scheme:
one or more embodiments provide a distributed control high-voltage reactive automatic compensation system, which comprises a controller, grouping measurement and control protection units and reactive compensation units, wherein each reactive compensation unit is connected with one grouping measurement and control protection unit, and the controller is in communication connection with the grouping measurement and control protection units.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the controller in the compensation system is not directly connected with the reactive compensation unit, but is connected with the grouping measurement and control protection unit through a communication network. Each reactive compensation unit is provided with a grouping measurement and control protection unit, so that the expansion of the compensation units can be realized.
(2) The problems that the number of branches of the grouping type high-voltage reactive automatic compensation device is limited by a controller control mode and an interface and wiring on a construction site is complex are effectively solved.
(3) Aiming at the symmetry faults existing in the protection mode adopted by the specific wiring mode, the method can accurately judge, improve the reliability of the reactive power compensation device, reduce the occurrence of accidents and ensure the normal operation of the power grid.
Advantages of additional aspects of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the utility model and not to limit the utility model.
FIG. 1 is an electrical schematic of an automatic compensation system according to an embodiment of the present invention;
FIG. 2 is a block diagram of an automatic compensation system of an embodiment of the present invention;
wherein: 1. the device comprises a controller, 2, a grouping measurement and control protection unit, 3, a display, 4, a switching device, 5, a capacitor, 6, a reactor, 7, a voltage sensing device, 8, a current sensing device, 9 and a lightning arrester.
The specific implementation mode is as follows:
the utility model is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the technical solutions disclosed in one or more embodiments, as shown in fig. 1-2, a distributed control high-voltage reactive automatic compensation system includes a controller 1, a group measurement and control protection unit 2, and a plurality of reactive compensation units, where each reactive compensation unit is equipped with and connected to one group measurement and control protection unit 2, and the controller 1 is in communication connection with the group measurement and control protection unit 2.
The controller 1 of the present embodiment is not directly connected to the reactive power compensation unit, but is connected to the grouping measurement and control protection unit 2. Every reactive compensation unit is equipped with a grouping measurement and control protection unit 2, and a branch road is constituteed in the connection of one-to-one, and grouping measurement and control protection unit 2 can detect the trouble respectively to single branch road, can detect symmetrical trouble to the loaded down with trivial details problem of wiring has been solved.
Specifically, the system further comprises a communication network, which is used for establishing connection between the controller 1 and the packet measurement and control protection unit 2, and may be a wired communication network or a wireless communication network.
The number of the grouping measurement and control protection units 2 and the number of the reactive compensation units can be expanded at will, and each grouping measurement and control protection unit 2 can carry out information interaction with the controller 1 through a communication network.
Real-time state information, characteristic parameter information and protection information of each group of reactive compensation units can be uploaded to the controller 1 through a communication network, the controller 1 can judge according to control fixed values of voltage and power factors, the communication network is used for issuing instructions to different grouping measurement and control protection units 2, the grouping measurement and control protection units 2 issue instructions to corresponding reactive compensation units, and states, protection information and protection states of devices in the reactive compensation units corresponding to the grouping measurement and control protection units 2 are uploaded to the controller 1, and information interaction is achieved.
The further improvement is that the system also comprises a first detection unit for detecting the system bus, and the first detection unit comprises a first voltage detection circuit, a first current detection circuit and a first switching value input circuit.
The first current detection circuit and the first voltage detection circuit are both connected with a sensing device of a power grid, the first current detection circuit is connected to a first current transformer on the power grid, the first voltage detection circuit is connected to a first voltage transformer on the power grid, and the first voltage detection circuit is respectively used for obtaining the current and the voltage of the power grid and can be used for calculating to obtain parameters such as active power, reactive power, power factors and the like; the first switching value input circuit is connected with a circuit breaker in a switch cabinet of a superior line and used for acquiring a state signal of the circuit breaker, and the current operation mode of the system can be judged according to the signal detected by the first detection unit.
The first current detection circuit comprises a first small-signal current transformer, a first sampling circuit and a first synchronous analog-to-digital A/D converter which are sequentially connected, and converts detected analog current signals into digital signals. The first small-signal current transformer is connected with the secondary measurement of the first current transformer, collected power grid current signals are further converted into smaller current signals, and the method can be more suitable for data processing.
The first voltage detection circuit comprises a first small signal voltage transformer and a second synchronous analog-to-digital A/D converter which are sequentially connected, and the first small signal voltage transformer and the second synchronous analog-to-digital A/D converter are mutually sequentially connected to convert a detected analog voltage signal into a digital signal; the first small-signal voltage transformer is connected with the secondary measurement of the first voltage transformer, collected power grid voltage signals are further converted into smaller voltage signals, and the method can be more suitable for data processing.
The first switching value input circuit comprises a first photoelectric coupler and a peripheral circuit, voltage signals are converted into digital signals, and corresponding voltage signals in the on-off state of the switch are detected through a switch circuit in a connecting circuit.
Further, the controller 1 may be further connected to a monitoring platform of the power system, connected to a higher-level integrated automation system, and configured to receive a command issued by a control command of the integrated automation system, and upload information and status of the distributed control high-voltage reactive automatic compensation system to the higher-level integrated automation system.
In a specific embodiment, the grouping measurement and control protection unit 2 includes a second current detection circuit, a second voltage detection circuit, a second switching value input circuit and a switching value output circuit.
The second current detection circuit is connected with a current sensing device 8 in the reactive compensation unit, the second voltage detection circuit is connected with a voltage sensing device 7 in the reactive compensation unit, and the second switching value input circuit and the switching value output circuit are respectively connected with a switching device 4 of the reactive compensation unit.
The second current detection circuit and the second voltage detection circuit are respectively connected with a sensing device in the reactive compensation unit, detect current and voltage signals and can be used for judging whether the protected device is in a normal state or not according to a protection fixed value; the second switching value input circuit is used for detecting the state of a switching device 4 of the reactive compensation unit; and the switching value output circuit is connected with the switching device 4 of the reactive compensation unit and is used for transmitting the control command. Each circuit is connected with the controller 1 through a communication network, and information interaction between the grouping measurement and control protection unit 2 and the controller 1 is realized.
The second current detection circuit can be the same as the first detection circuit in structure, and comprises a second small-signal current transformer, a second sampling circuit and a third synchronous analog-to-digital A/D converter which are sequentially connected, detected analog current signals are converted into digital signals, and the second small-signal current transformer is connected with a current sensing device in the reactive compensation unit.
The second voltage detection circuit can be the same as the first voltage detection circuit in structure, and comprises a second small signal voltage transformer and a fourth synchronous analog-to-digital A/D converter which are sequentially connected, the detected analog voltage signal is converted into a digital signal, and the second small signal voltage transformer is connected with a voltage sensing device in the reactive compensation unit.
The second switching value input circuit may have the same structure as the first switching value input circuit, and include a second photocoupler and a peripheral circuit to convert the voltage signal into a digital signal.
And the switching value output circuit comprises a third photoelectric coupler and an output relay, the photoelectric coupler is connected with a coil of the output relay to drive the relay, and then the relay auxiliary contact outputs a signal to the switching device 4.
The number of the reactive compensation units can be set according to specific actual requirements, and the reactive compensation units are arranged on a bus connected with the load in parallel.
In some embodiments, the reactive compensation unit comprises a switching device 4, a capacitor 5, a reactor 6, a voltage sensing device 7, a current sensing device 8 and a lightning arrester 9; the current sensing device 8, the switching device 4, the capacitor 5, and the reactor 6 are connected in series, the current sensing device 8 is connected to the bus, and the voltage sensing device 7 is connected in parallel across the capacitor 5. One end of the lightning arrester 9 is connected to a line between the switching device 4 and the capacitor 5, and the other end is grounded.
In order to realize local display and alarm and improve the visualization of the system operation, the system further comprises a display 3, and the display 3 is in communication connection with the controller 1. The display 3 may be an LED display, an LCD display, or the like.
In some embodiments, an alarm is further included, and the alarm is in communication with the controller 1.
When the device is used, the reactive compensation units are often provided with a plurality of groups, only one controller 1 is provided, the controller 1 can be installed on a wiring cabinet or one reactive compensation unit cabinet, information interaction is carried out between the controller 1 and the grouped measurement and control units in a communication mode, so that connecting wires between the reactive compensation units and the controller 1 are only communication wires and power wires, the wiring quantity is greatly reduced, and the problem of complicated field wiring of the grouped high-voltage reactive compensation device is solved as shown in fig. 2.
In the operation process, a user can set parameters such as system voltage, a target power factor and the like of the distributed control high-voltage reactive automatic compensation system, when the system voltage or the power factor does not meet the requirement of a set value and meets the input condition of the capacitor 5, the controller 1 can send a command to the grouping measurement and control protection unit 2, and information transmission between the controller 1 and the grouping measurement and control unit is completed in a communication mode. The grouping measurement and control protection unit 2 can receive the command sent by the controller 1 and send the command to the switch device 4, and meanwhile, various information of the corresponding reactive compensation unit is uploaded to the controller 1; and protecting the reactive compensation unit according to the protection definite value by sampling the current and the voltage. When each detected value reaches the requirement of a protection fixed value, the grouping measurement and control protection unit 2 can act on the switch device 4 and upload fault information to the controller 1, and after the controller 1 receives the information, the reactive compensation unit is locked and quitted from the power grid, and the normal operation of other reactive compensation units is not influenced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims (10)

1. The utility model provides a distributed control high pressure reactive automatic compensation system which characterized by: the system comprises a controller, grouping measurement and control protection units and reactive compensation units, wherein each reactive compensation unit is connected with one grouping measurement and control protection unit, and the controller is in communication connection with the grouping measurement and control protection units.
2. The distributed control high-voltage reactive power automatic compensation system according to claim 1, characterized in that: the communication network is respectively connected with the controller and the grouping measurement and control protection unit, and is a wired communication network or a wireless communication network.
3. The distributed control high-voltage reactive power automatic compensation system according to claim 1, characterized in that: still including the first detecting element who is used for detecting higher level's circuit, first detecting element includes first voltage detection circuit, first current detection circuit and first switching value input circuit, and first current detection circuit is connected to the first current transformer on the electric wire netting, and first voltage detection circuit is connected to the first voltage transformer on the electric wire netting, and first switching value input circuit is connected with the circuit breaker in the cubical switchboard of higher level's circuit.
4. A distributed control high voltage reactive power automatic compensation system according to claim 3, characterized in that:
the first current detection circuit comprises a first small-signal current transformer, a first sampling circuit and a first synchronous analog-to-digital (A/D) converter which are sequentially connected, and the first small-signal current transformer is connected with the first current transformer;
the first voltage detection circuit comprises a first small signal voltage transformer and a second synchronous analog-to-digital (A/D) converter which are sequentially connected, and the first small signal voltage transformer is connected with a first voltage transformer;
the first switching value input circuit comprises a first photoelectric coupler and a peripheral circuit.
5. The distributed control high-voltage reactive power automatic compensation system according to claim 1, characterized in that: the monitoring platform is further included, and the controller is connected to the monitoring platform.
6. The distributed control high-voltage reactive power automatic compensation system according to claim 1, characterized in that: the grouping measurement and control protection unit comprises a second current detection circuit, a second voltage detection circuit, a second switching value input circuit and a switching value output circuit;
the second current detection circuit is connected with a current sensing device in the reactive compensation unit, the second voltage detection circuit is connected with a voltage sensing device in the reactive compensation unit, and the second switching value input circuit and the switching value output circuit are respectively connected with a switching device of the reactive compensation unit.
7. The distributed control high-voltage reactive power automatic compensation system according to claim 6, characterized in that:
the second current detection circuit comprises a second small-signal current transformer, a second sampling circuit and a third synchronous analog-to-digital A/D converter which are sequentially connected, and the second small-signal current transformer is connected with a current sensing device in the reactive compensation unit;
the second voltage detection circuit comprises a second small signal voltage transformer and a fourth synchronous analog-to-digital A/D converter which are connected in sequence, and the second small signal voltage transformer is connected with a voltage sensing device in the reactive compensation unit;
the second switching value input circuit comprises a second photoelectric coupler and a peripheral circuit;
and the switching value output circuit comprises a third photoelectric coupler and an output relay, the photoelectric coupler is connected with a coil of the output relay, and an auxiliary contact of the relay is connected with a switching device.
8. The distributed control high-voltage reactive power automatic compensation system according to claim 1, characterized in that:
the reactive compensation unit comprises a switching device, a capacitor, a reactor, a voltage sensing device and a current sensing device; the current sensing device, the switching device, the capacitor and the reactor are sequentially connected in series, the current sensing device is connected to the bus, and the voltage sensing device is connected to two ends of the capacitor in parallel;
still include the arrester, the circuit between switching device and the condenser is connected to arrester one end, and the other end ground connection of arrester.
9. The distributed control high-voltage reactive power automatic compensation system according to claim 1, characterized in that: the automatic compensation system also comprises a display, and the display is connected with the controller.
10. The distributed control high-voltage reactive power automatic compensation system according to claim 1, characterized in that: the automatic compensation system also comprises an alarm which is connected with the controller.
CN202122479170.0U 2021-10-14 2021-10-14 Distributed control high-voltage reactive automatic compensation system Active CN216086166U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122479170.0U CN216086166U (en) 2021-10-14 2021-10-14 Distributed control high-voltage reactive automatic compensation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122479170.0U CN216086166U (en) 2021-10-14 2021-10-14 Distributed control high-voltage reactive automatic compensation system

Publications (1)

Publication Number Publication Date
CN216086166U true CN216086166U (en) 2022-03-18

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