CN212991980U - System for continuously adjusting reactive voltage based on magnetically controlled reactor in regional power grid - Google Patents
System for continuously adjusting reactive voltage based on magnetically controlled reactor in regional power grid Download PDFInfo
- Publication number
- CN212991980U CN212991980U CN202021605676.0U CN202021605676U CN212991980U CN 212991980 U CN212991980 U CN 212991980U CN 202021605676 U CN202021605676 U CN 202021605676U CN 212991980 U CN212991980 U CN 212991980U
- Authority
- CN
- China
- Prior art keywords
- magnetically controlled
- controlled reactor
- isolating switch
- voltage
- continuously adjusting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The utility model relates to the technical field of electric power, in particular to a system for continuously adjusting reactive voltage based on a magnetically controlled reactor in a regional power grid, which comprises a first isolating switch QF1, a second isolating switch QF2 and a voltage transformer PT1 which are respectively connected with the side of a bus, the branch of the first isolating switch QF1 is connected with a current transformer CT1 for measuring the current of the branch and then is connected with a magnetically controlled reactor L1, the branch circuit that second isolator QF2 belongs to has concatenated condenser C1, still include with voltage transformer PT1, current transformer CT1, first isolator QF1, second isolator QF2, magnetically controlled reactor L1 communication connection be used for continuous regulation magnetically controlled reactor L1 output capacity's controller, the utility model discloses the output capacity of continuous regulation reactor reaches real-time dynamic tracking compensation load idle, improves the purpose of system power factor, stable system voltage.
Description
Technical Field
The utility model relates to the field of electric power technology, especially, relate to system based on magnetically controlled reactor continuous regulation reactive voltage in the regional electric wire netting.
Background
Reactive voltage optimization and control in the power system are important means for improving the voltage qualification rate, reducing the network loss and improving the system operation safety. The method for adjusting the voltage and the reactive power device at the present stage mainly comprises the following steps: 1) switching the parallel capacitor bank; 2) and adjusting a tap joint of the on-load tap changing transformer. The method has the defects that the reactive power can not be continuously adjusted, the switching times of the capacitor bank are limited, and the real optimal reactive voltage control can not be achieved. And the dynamic reactive compensation device with dynamic, smooth and fast regulation capability, such as TCR type SVC and STATCOM (SVG), can provide an effective solution for the limitation of the discrete control mode of the conventional fixed reactive compensation equipment on the basis of increasing the reactive regulation range. However, due to the limitation of the performance of power electronic devices, the two reactive compensation devices need to be connected in series with a plurality of devices to share high voltage and to be connected in parallel for current sharing, and the technical requirements and maintenance cost are high, so that the two reactive compensation devices cannot be popularized and used in a power system.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a system based on magnetically controlled reactor continuous regulation reactive voltage in the regional electric wire netting.
The system for continuously adjusting reactive voltage based on the magnetically controlled reactor in the regional power grid comprises a first isolating switch QF1, a second isolating switch QF2 and a voltage transformer PT1 for measuring bus voltage, wherein the first isolating switch QF1, the second isolating switch QF2 and the voltage transformer PT1 are respectively connected to the bus side, a branch where the first isolating switch QF1 is located is connected with a current transformer CT1 for measuring branch current, and then is connected with a magnetically controlled reactor L1, a branch where the second isolating switch QF2 is located is connected with a capacitor C1 in series, and the system further comprises a controller which is in communication connection with the voltage transformer PT1, the current transformer CT1, the first isolating switch QF1, the second isolating switch QF2 and the magnetically controlled reactor L1 and is used for continuously adjusting the output.
Preferably, the controller comprises a communication module connected with a voltage transformer PT1 and a current transformer CT1, and a control module connected with the communication module and used for continuously adjusting the output capacity of the magnetically controlled reactor L1.
Preferably, the first isolating switch QF1 comprises a first auxiliary contact for obtaining switch state information, and the second isolating switch QF2 comprises a second auxiliary contact for obtaining switch state information; the first auxiliary contact and the second auxiliary contact are in communication connection with the controller to upload switch state information.
Preferably, the controller further comprises a display module connected with the control module and used for displaying the switch state information.
Preferably, the controller further comprises an MCR control screen connected to the control module for inputting information.
Through using the utility model discloses, can realize following effect: the voltage of the magnetically controlled reactor L1 is obtained through a voltage transformer PT1, the current of the magnetically controlled reactor L1 is obtained through a current transformer CT1, the controller calculates the output capacity of the magnetically controlled reactor L1 in real time according to the voltage and current signals, and then the output capacity of the magnetically controlled reactor is continuously adjusted according to the control target value output, so that the purposes of dynamically tracking and compensating the reactive power of the load in real time, improving the power factor of the system and stabilizing the voltage of the system are achieved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic circuit diagram of a system for continuously adjusting reactive voltage based on a magnetically controlled reactor in a regional power grid according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of a controller in a system for continuously adjusting reactive voltage based on a magnetically controlled reactor in a regional power grid according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a controller in a system for continuously adjusting reactive voltage based on a magnetically controlled reactor in an area power grid.
Detailed Description
The technical solution of the present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The embodiment of the utility model provides a system based on magnetically controlled reactor continuous regulation reactive voltage in regional electric wire netting, as shown in fig. 1 ~ 2, include: the intelligent control system comprises a first isolating switch QF1, a second isolating switch QF2 and a voltage transformer PT1 which are connected to the side of a bus respectively and used for measuring the voltage of the bus, wherein a branch where the first isolating switch QF1 is located is connected with a current transformer CT1 which is used for measuring the current of the branch and then is connected with a magnetically controlled reactor L1, a branch where the second isolating switch QF2 is located is connected with a capacitor C1 in series, and the intelligent control system further comprises a controller which is in communication connection with the voltage transformer PT1, the current transformer CT1, the first isolating switch QF1, the second isolating switch QF2 and the magnetically controlled reactor L1 and used for continuously adjusting the output capacity of the magnetically controlled reactor L1.
The voltage of the magnetically controlled reactor L1 is obtained through a voltage transformer PT1, the current of the magnetically controlled reactor L1 is obtained through a current transformer CT1, the controller calculates the output capacity of the magnetically controlled reactor L1 in real time according to the voltage and current signals, and then the output capacity of the magnetically controlled reactor is continuously adjusted according to the control target value output, so that the purposes of dynamically tracking and compensating the reactive power of the load in real time, improving the power factor of the system and stabilizing the voltage of the system are achieved.
It should be noted that, it is prior art to calculate the output capacity of the magnetically controlled reactor L1 in real time according to the voltage and current signal, and therefore, the detailed description is omitted. In addition, the output capacity of the reactor is continuously adjusted according to the output capacity of the magnetically controlled reactor L1 and the control target value output, which is also the prior art, and therefore, the detailed description is omitted.
As shown in fig. 3, the controller includes a communication module connected to a voltage transformer PT1 and a current transformer CT1, and a control module connected to the communication module for continuously adjusting the output capacity of the magnetically controlled reactor L1.
The voltage transformer PT1 and the current transformer CT1 upload measured current and voltage signals through the communication module, and the control module continuously adjusts the output capacity of the magnetically controlled reactor L1 according to the current and voltage signals.
The first isolating switch QF1 comprises a first auxiliary contact for acquiring switch state information, and the second isolating switch QF2 comprises a second auxiliary contact for acquiring switch state information; the first auxiliary contact and the second auxiliary contact are in communication connection with the controller to upload switch state information.
The first auxiliary contact and the second auxiliary contact are in communication connection with the controller to upload switch state information, the controller judges the switch states of the first isolating switch QF1 and the second isolating switch QF2 according to the switch state information, and if necessary, the output capacity of the magnetically controlled reactor L1 can be adjusted in an auxiliary mode through controlling the switch states of the first isolating switch QF1 and the second isolating switch QF 2.
For the convenience of the user, as shown in fig. 3, the controller further includes a display module connected to the control module for displaying the switch status information.
As shown in fig. 3, the controller further includes an MCR control panel connected to the control module for inputting information. The input information can be manually used for adjusting the output capacity of the magnetic control reactor L1.
The utility model discloses realize that reactive power continuous adjustment's principle as follows:
when the system is not put into use, the following steps are provided:
wherein the content of the first and second substances,
general Delta UX<<ΔURTherefore, Δ U is ignoredXObtaining:
the above formula and the calculation process are prior art and are not described herein again.
In summary, if the voltage on the load side is to be stable, it is necessary to adjust UBImplementation of UBAnd USThe following relationships also exist:
will the reactive power sent out after the reactive power compensation device of the utility model is put into operation is Q1And Q is1＝QC-QLAnd then:
in the above formula, USIs the system voltage, RS、XSIs the equivalent impedance of the system, UAThe main transformer is provided with a high-voltage side voltage, RT、XTIs the main equivalent impedance, nT: 1 is main transformation ratio, UBVoltage at low-voltage side of main transformer, R, X load equivalent impedance, QCReactive power, Q, emitted for the capacitorLU is the voltage of the load side and P-jQ is the power consumed by the load for the reactive power absorbed by the magnetically controlled reactor.
From the above formula, it can be found that if it is desired to make UBChange occurs only by adjusting Q1Is realized because of Q1＝QC-QLAnd Q isCThe reactive power generated by the fixed capacitor is always kept constant, so that the Q can be changed by adjusting the magnetically controlled reactorLTo achieve the control objective.
Therefore, the magnetic control electric controller is arranged in a transformer substation and is connected with the capacitor with the same capacity in parallel to replace the original grouping switching capacitor, and when the magnetic control electric reactor is subjected to stepless regulation, namely QLTake place ofWhen continuously changed, Q1And the control circuit is continuously changed along with the control circuit, so that the continuous control of the reactive power can be realized.
Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (5)
1. The system for continuously adjusting reactive voltage based on the magnetically controlled reactor in the regional power grid is characterized by comprising a first isolating switch QF1, a second isolating switch QF2 and a voltage transformer PT1 for measuring the bus voltage, wherein the first isolating switch QF1, the second isolating switch QF2 and the voltage transformer PT1 are respectively connected to the bus side, a branch where the first isolating switch QF1 is located is connected with a current transformer CT1 for measuring branch current, then the magnetically controlled reactor L1 is connected, a branch where the second isolating switch QF2 is located is connected with a capacitor C1 in series, and the system further comprises a controller which is in communication connection with the voltage transformer PT1, the current transformer CT1, the first isolating switch 1, the second isolating switch QF 539 7 and the magnetically controlled reactor L1 and is used for continuously adjusting the output capacity of the.
2. The system for continuously adjusting reactive voltage based on the magnetically controlled reactor in the regional power grid according to claim 1, wherein the controller comprises a communication module connected with a voltage transformer PT1 and a current transformer CT1, and a control module connected with the communication module and used for continuously adjusting output capacity of the magnetically controlled reactor L1.
3. The system for continuously regulating reactive voltage based on the magnetically controlled reactor in the regional power grid according to claim 2, wherein the first isolating switch QF1 comprises a first auxiliary contact for obtaining switch state information, and the second isolating switch QF2 comprises a second auxiliary contact for obtaining switch state information; the first auxiliary contact and the second auxiliary contact are in communication connection with the controller to upload switch state information.
4. The system for continuously adjusting reactive voltage based on the magnetically controlled reactor in the regional power grid according to claim 3, wherein the controller further comprises a display module connected with the control module for displaying the switch state information.
5. The system for continuously adjusting reactive voltage based on the magnetically controlled reactor in the regional power grid according to any one of claims 2 to 4, wherein the controller further comprises an MCR control screen connected with the control module and used for inputting information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021605676.0U CN212991980U (en) | 2020-08-05 | 2020-08-05 | System for continuously adjusting reactive voltage based on magnetically controlled reactor in regional power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021605676.0U CN212991980U (en) | 2020-08-05 | 2020-08-05 | System for continuously adjusting reactive voltage based on magnetically controlled reactor in regional power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212991980U true CN212991980U (en) | 2021-04-16 |
Family
ID=75432558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021605676.0U Active CN212991980U (en) | 2020-08-05 | 2020-08-05 | System for continuously adjusting reactive voltage based on magnetically controlled reactor in regional power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212991980U (en) |
-
2020
- 2020-08-05 CN CN202021605676.0U patent/CN212991980U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103606932B (en) | The low voltage dynamic reactive-power compensation capacitor autocontrol method that load is relevant | |
| CN201805234U (en) | Comprehensive voltage reactive power control system with harmonic suppression function | |
| CN111049149B (en) | Power grid terminal low voltage treatment method | |
| US7843176B2 (en) | Apparatus and method for improved power flow control in a high voltage network | |
| CN111614117A (en) | Transient voltage disturbance fast response control method for centralized photovoltaic power station | |
| CN104701856A (en) | Method of controlling reactive voltage at grid connection point of wind power plant | |
| EP1678805A1 (en) | System for transmission of electric power | |
| CN201887482U (en) | Dynamic reactive compensation device for transformer substation-type voltage reactive integrated control | |
| CN212991980U (en) | System for continuously adjusting reactive voltage based on magnetically controlled reactor in regional power grid | |
| CN112310972B (en) | Coordinated control method for AVC system of master station and static reactive compensation device of station end | |
| Ilisiu et al. | Modern reactive power compensation for smart electrical grids | |
| CN107482642A (en) | A kind of plug and play cascade active compensator | |
| CN201150004Y (en) | Joint operation control system for DSTATCOM and IVC | |
| CN203553945U (en) | Shunt magnetically-controlled reactor-type dynamic reactive voltage regulation device | |
| CN102426896A (en) | Superconducting controlled reactor containing pulse width modulation (PWM) power control unit | |
| CN211790774U (en) | Mixed type dynamic reactive power compensation system based on high-impedance transformer | |
| CN104377711A (en) | Dynamic reactive power compensation method | |
| CN110429610B (en) | Voltage reactive power regulation and control method for power distribution system with multiple DFACTS (active feedback control active) devices | |
| CN2631097Y (en) | Dynamic reactive compensating and filtering device | |
| CN1143849A (en) | High-low voltage capacitor complete compensator | |
| CN112436521A (en) | Active comprehensive voltage regulating system based on 10kV series compensation | |
| CN112003289A (en) | Power distribution network undervoltage automatic compensation method and device based on bilateral multi-tap transformer | |
| CN105680452B (en) | A kind of flexible Loading voltage regulator of integrated flexible AC transmission equipment | |
| CN214958712U (en) | Active comprehensive voltage regulating system based on 10kV series compensation | |
| CN215267654U (en) | Device is administered to terminal low-voltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |