CN217335102U - Novel wind power and photovoltaic grid-connected protection device - Google Patents
Novel wind power and photovoltaic grid-connected protection device Download PDFInfo
- Publication number
- CN217335102U CN217335102U CN202220899677.3U CN202220899677U CN217335102U CN 217335102 U CN217335102 U CN 217335102U CN 202220899677 U CN202220899677 U CN 202220899677U CN 217335102 U CN217335102 U CN 217335102U
- Authority
- CN
- China
- Prior art keywords
- voltage
- photovoltaic
- protection device
- grid
- ars
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The utility model relates to a wind-powered electricity generation, photovoltaic are incorporated into the power networks the protection field, specifically are a novel wind-powered electricity generation, photovoltaic are incorporated into the power networks protection device, novel wind-powered electricity generation, photovoltaic are incorporated into the power networks protection device includes: PT high-voltage fuse RD1, PT high-voltage fuse RD2, overvoltage protector TBP, voltage transformer TV1, voltage transformer TV2, microcomputer protection control unit ZK, quick circuit breaker ARS, arrester ZD and current transformer LH, the utility model discloses wind-powered electricity generation, photovoltaic grid-connected protection device, novel structure, the number of times that can significantly reduce power generation system and grid-tie repeatedly when the trouble reduces the impact to the electric wire netting, prevents grid voltage and frequency collapse, improves the tolerance of electric wire netting to abnormal voltage, wholly improves the flexible strong degree of electric wire netting.
Description
Technical Field
The utility model relates to a wind-powered electricity generation, photovoltaic are incorporated into the power networks the protection field, specifically are a novel wind-powered electricity generation, photovoltaic are incorporated into the power networks protection device.
Background
Worldwide, with the gradual depletion of conventional fossil energy and the increasing environmental pressure, renewable energy is becoming an important subject of development of various countries. Solar energy and wind energy belong to renewable energy sources which are widely applied at present, the supply of the energy sources is endless, the utilization of the energy sources can not influence the environment, and solar photovoltaic power generation and wind power generation technologies are favored and valued by people.
With the development of the photovoltaic power generation and wind power generation industries, in recent years, a large number of inverter type distributed photovoltaic power supplies and wind generating sets are connected to a power grid, grid connection faults of photovoltaic power generation and wind power generation are also concerned, faults generated by grid connection of the photovoltaic power generation and wind power generation systems are gradually exposed, and when system voltage drops due to system short circuit, voltage fluctuation, flicker and the like, the photovoltaic power generation and the wind generating sets cannot be normally connected to the grid, so that large-area grid disconnection is easily caused. Photovoltaic power generation and wind generating set large tracts of land are taken off the net and are influenced the electric wire netting very greatly, can not provide certain idle work in order to help the electric wire netting to restore voltage when electric wire netting voltage resumes, consequently, to above present situation, urgent need develop a novel wind-powered electricity generation, photovoltaic protection device that is incorporated into the power networks to overcome not enough in the current practical application.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel wind-powered electricity generation, photovoltaic are incorporated into power networks protection device to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a novel wind-powered electricity generation, photovoltaic grid-connected protection device, novel wind-powered electricity generation, photovoltaic grid-connected protection device includes: PT high-voltage fuse RD1, PT high-voltage fuse RD2, overvoltage protector TBP, voltage transformer TV1, voltage transformer TV2, microcomputer protection control unit ZK, quick circuit breaker ARS, resistance device ZD and current transformer LH, the input end of the grid-connected protection device is connected with a power grid, the output end of the grid-connected protection device is connected with the wind power or photovoltaic power generation side as the protection device, the wind power or photovoltaic power generation side is connected with a generating side bus, the upper end of the rapid circuit breaker ARS is connected with the upper end of the resistance device ZD and then connected with the upper end of the PT high-voltage fuse RD1, and finally connected with the generating side bus, the lower end of the PT high-voltage fuse RD1 is connected with a voltage transformer TV1, the lower end of the rapid circuit breaker ARS is connected with the lower end of the resistance device ZD and then connected with the upper end of a PT high-voltage fuse RD2, and finally, the lower end of the PT high-voltage fuse RD2 is connected with a voltage transformer TV2 through a current transformer LH.
Preferably, the resistance device ZD is a capacitive element, an inductive element, or a resistive element.
Preferably, the fast circuit breaker ARS is an eddy current driven fast circuit breaker, the switching-off time of the eddy current driven fast circuit breaker is less than or equal to 5ms, and the switching-on time is less than or equal to 20 ms.
Preferably, the rapid breaker ARS is a fuse, a thyristor, a circuit breaker or a contactor.
Preferably, the voltage transformer TV1 and the voltage transformer TV2 are anti-saturation voltage transformers, and the overvoltage protector TBP is a three-phase combined high-capacity overvoltage protector.
Preferably, the microcomputer protection control unit ZK monitors the system voltage in real time;
when the voltage drops, the protection device sends a brake-separating pulse signal to the rapid circuit breaker ARS within 2 ms;
when the voltage returns to normal, the protection device sends a closing pulse signal to the rapid breaker ARS within 2 ms.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses wind-powered electricity generation, photovoltaic is incorporated into power networks protection device, be applied to 10/35kV and be incorporated into the power networks, when the electric wire netting short circuit, voltage drops, the quick circuit breaker ARS disconnection of the device, drop into resistance device ZD, keep aerogenerator or photovoltaic power generation system voltage normal, do not deviate from the electric wire netting and continue to maintain the operation, provide certain idle work for the electric wire netting in order to help the electric wire netting to resume voltage, quick circuit breaker ARS closes a floodgate after the trouble is amputated, resistance device ZD withdraws, the system resumes normal operating, this can greatly reduce the number of times that the power generation system is incorporated into the power networks repeatedly when the trouble, reduce the impact to the electric wire netting, prevent electric wire netting voltage and frequency collapse, improve the power netting's tolerance to abnormal voltage, improve electric wire netting flexibility and the strong degree wholly, when photovoltaic power generation or wind power generation side appear the short circuit and cause voltage to drop, the quick circuit breaker ARS disconnection of the device, drop into resistance device ZD, and (4) keeping the normal operation of the voltage of the power grid, switching on the rapid breaker ARS after the fault is removed, withdrawing the resistance device ZD, and recovering the normal operation of the system.
Drawings
Fig. 1 is the utility model discloses wind-powered electricity generation, photovoltaic are incorporated into power networks protection device's wiring circuit diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The following detailed description is provided for the specific embodiments of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a novel wind power and photovoltaic grid-connected protection device, which includes:
PT high-voltage fuse RD1, PT high-voltage fuse RD2, overvoltage protector TBP, voltage transformer TV1, voltage transformer TV2, microcomputer protection control unit ZK, quick circuit breaker ARS, resistance device ZD and current transformer LH, the input end of the grid-connected protection device is connected with a power grid, the output end of the grid-connected protection device is connected with the wind power or photovoltaic power generation side as the protection device, the wind power or photovoltaic power generation side is connected with a generating side bus, the upper end of the rapid circuit breaker ARS is connected with the upper end of the resistance device ZD and then connected with the upper end of the PT high-voltage fuse RD1, and finally connected with the generating side bus, the lower end of the PT high-voltage fuse RD1 is connected with a voltage transformer TV1, the lower end of the rapid circuit breaker ARS is connected with the lower end of the resistance device ZD and then connected with the upper end of a PT high-voltage fuse RD2, and finally, the lower end of the PT high-voltage fuse RD2 is connected with a voltage transformer TV2 through a current transformer LH.
The device is arranged at the grid-connected position of a wind driven generator or a photovoltaic power generation system, when a power grid has a short circuit and a voltage drop, a quick breaker ARS of the device is disconnected, a resistance device ZD is put in, the voltage of the wind driven generator or the photovoltaic power generation system is kept normal, the wind driven generator or the photovoltaic power generation system is not separated from the power grid and is continuously kept running, a certain reactive power is provided for the power grid to help the power grid to recover the voltage, the quick breaker ARS is switched on after the fault is removed, the resistance device ZD is withdrawn, and the system recovers the normal running, so that the repeated grid-connection times of the power generation system during the fault can be greatly reduced, the impact on the power grid is reduced, the voltage and frequency collapse of the power grid are prevented, the tolerance of the power grid to abnormal voltage is improved, the flexibility and the strength of the power grid are integrally improved, when the voltage drop is caused by the short circuit on the photovoltaic power generation side or the wind driven power generation side, the quick breaker ARS of the device is disconnected, the resistance device is put in, and the voltage of the power grid is kept running normally, after the fault is removed, the rapid breaker ARS is switched on, the resistance device ZD is withdrawn, and the system recovers to normal operation.
In an embodiment of the present invention, referring to fig. 1, the resistance device ZD is a capacitor device, an inductor device or a resistor device;
the rapid breaker ARS is an eddy current driven rapid breaker, the switching-off time of the eddy current driven rapid breaker is less than or equal to 5ms, and the switching-on time is less than or equal to 20 ms;
the rapid circuit breaker ARS is a fuse, a controllable silicon, a circuit breaker or a contactor;
the voltage transformer TV1 and the voltage transformer TV2 are anti-saturation voltage transformers, and the over-voltage protector TBP is a three-phase combined high-capacity over-voltage protector;
the microcomputer protection control unit ZK monitors the system voltage in real time, and when the voltage drops, the protection device sends a brake-separating pulse signal to the rapid circuit breaker ARS within 2 ms; when the voltage returns to normal, the protection device sends a closing pulse signal to the rapid breaker ARS within 2 ms.
By the aid of the anti-saturation voltage transformer, ferromagnetic resonance can be effectively inhibited, and damage of resonance to equipment is reduced; the resistance device element is an original element with the same effect as a capacitance element, an inductance element and a resistance element, and the resistance device ZD is matched with the rapid circuit breaker ARS to ensure that the voltage on the non-fault side does not drop and ensure that the equipment on the non-fault side normally operates; the eddy current driving quick circuit breaker is an original component with the same effect as a fuse, a controllable silicon, a circuit breaker, a contactor and the like, the switching-off time of the circuit breaker is less than or equal to 5ms, the switching-on time of the circuit breaker is less than or equal to 15ms, the quick circuit breaker ARS is switched off within 5ms after receiving a pulse signal of a control unit by utilizing the quick characteristic of the eddy current driving quick circuit breaker, and a resistance device ZD is put into the circuit breaker to ensure that the voltage on a non-fault side is normal; the microcomputer protection control unit ZK is a specially-made control unit, the control unit monitors the system voltage in real time, when the voltage drops, the device can send a switching-off pulse signal to the rapid breaker ARS within 2ms, and when the voltage returns to normal, the device can send a switching-on pulse signal to the rapid breaker ARS within 2 ms.
The specific working principle of the device is as follows:
when the system normally operates, the eddy current drives the rapid circuit breaker ARS to be switched on, the voltage transformer TV and the three-phase combined high-capacity overvoltage protector TBP are connected with the bus, and the voltage transformer TV changes the voltage of the system into 100V and outputs the 100V to the secondary measuring equipment. When overvoltage occurs in the system, the three-phase combined high-capacity overvoltage protector TBP firstly works to limit the overvoltage of the system within the insulation allowable safety range of the electrical equipment, and the electrical equipment in the system is guaranteed not to be damaged by overvoltage impact. When a power grid is short-circuited and voltage drops, the control unit of the device collects voltage and current changes, accurately judges the voltage drop of the system, sends a pulse signal to the quick circuit breaker within 2ms, the quick circuit breaker is disconnected within 15ms after receiving the signal, and a resistance device is put into use, so that the voltage of the wind driven generator or the photovoltaic power generation system is not dropped, and the photovoltaic wind driven power generation system cannot be disconnected due to the voltage fluctuation of the power grid. The photovoltaic wind power generation system continues to operate without being separated from a power grid, certain reactive power is provided for the power grid to help the power grid to recover voltage, the quick breaker closing resistance device quits after the fault is removed, and the system recovers to normal operation. The method can greatly reduce the repeated grid connection times of the power generation system during the fault, reduce the impact on the power grid, prevent the voltage and frequency breakdown of the power grid, improve the tolerance of the power grid to abnormal voltage, and integrally improve the flexibility and the robustness of the power grid. When the photovoltaic power generation or wind power generation side has short circuit and causes voltage drop, the control unit of the device collects voltage and current changes, accurately judges the system voltage drop, sends a pulse signal to the quick breaker within 2ms, the quick breaker is disconnected within 15ms after receiving the signal, and the resistance device is put into use, so that the power grid voltage can be kept normally running by the aid of the resistance device, the power grid can not generate electricity interference due to internal voltage drop caused by short circuit of the power generation side, and large-area shutdown accidents of power loads on the power grid side can not occur due to electricity interference of the power grid. And after the fault is removed, the rapid breaker closing resistance device quits, and the system recovers normal operation.
It should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "sliding", "rotating", "fixing", "providing", and the like are to be understood in a broad sense, and may be, for example, a welded connection, a bolted connection, or an integral body; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a novel wind-powered electricity generation, photovoltaic protection that is incorporated into power networks device which characterized in that, novel wind-powered electricity generation, photovoltaic protection that is incorporated into power networks device includes: PT high-voltage fuse RD1, PT high-voltage fuse RD2, overvoltage protector TBP, voltage transformer TV1, voltage transformer TV2, microcomputer protection control unit ZK, quick circuit breaker ARS, resistance device ZD and current transformer LH, the input end of the grid-connected protection device is connected with a power grid, the output end of the grid-connected protection device is connected with the wind power or photovoltaic power generation side as the protection device, the wind power or photovoltaic power generation side is connected with a generating side bus, the upper end of the rapid circuit breaker ARS is connected with the upper end of the resistance device ZD and then connected with the upper end of the PT high-voltage fuse RD1, and finally connected with the generating side bus, the lower end of the PT high-voltage fuse RD1 is connected with a voltage transformer TV1, the lower end of the rapid circuit breaker ARS is connected with the lower end of the resistance device ZD and then connected with the upper end of a PT high-voltage fuse RD2, and finally, the lower end of the PT high-voltage fuse RD2 is connected with a voltage transformer TV2 through a current transformer LH.
2. The novel wind power and photovoltaic grid-connected protection device according to claim 1, wherein the resistance device ZD is a capacitive element, an inductive element or a resistive element.
3. The novel wind power and photovoltaic grid-connected protection device according to claim 1, wherein the fast breaker ARS is an eddy current driven fast breaker, the switching-off time of the eddy current driven fast breaker is less than or equal to 5ms, and the switching-on time is less than or equal to 20 ms.
4. The novel wind power and photovoltaic grid-connected protection device according to claim 3, wherein the rapid circuit breaker ARS is a fuse, a thyristor, a circuit breaker or a contactor.
5. The novel wind power and photovoltaic grid-connected protection device as claimed in claim 1, wherein the voltage transformer TV1 and the voltage transformer TV2 are anti-saturation voltage transformers, and the overvoltage protector TBP is a three-phase combined high-capacity overvoltage protector.
6. The novel wind power and photovoltaic grid-connected protection device according to claim 1, wherein the microcomputer protection control unit ZK monitors system voltage in real time;
when the voltage drops, the protection device sends a brake-separating pulse signal to the rapid circuit breaker ARS within 2 ms;
when the voltage returns to normal, the protection device sends a closing pulse signal to the rapid breaker ARS within 2 ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220899677.3U CN217335102U (en) | 2022-04-18 | 2022-04-18 | Novel wind power and photovoltaic grid-connected protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220899677.3U CN217335102U (en) | 2022-04-18 | 2022-04-18 | Novel wind power and photovoltaic grid-connected protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217335102U true CN217335102U (en) | 2022-08-30 |
Family
ID=82946373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220899677.3U Active CN217335102U (en) | 2022-04-18 | 2022-04-18 | Novel wind power and photovoltaic grid-connected protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217335102U (en) |
-
2022
- 2022-04-18 CN CN202220899677.3U patent/CN217335102U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| El Moursi et al. | A parallel capacitor control strategy for enhanced FRT capability of DFIG | |
| CN104362667A (en) | Cooperative control method of high and low voltage ride-through for doubly-fed wind turbine set | |
| Hossain | Transient stability improvement analysis among the series fault current limiters for DFIG based wind generator | |
| CN101917156B (en) | Method and device for protecting wind generating set during electric network voltage dip in short time | |
| CN105048497A (en) | Doubly-fed wind turbine generator low-voltage ride through method | |
| CN102904280A (en) | Device and method for traversing grid fault by double-fed wind power converter | |
| CN103337871B (en) | Wind generating set low voltage ride through circuit and corresponding control method | |
| CN102299526A (en) | Low voltage ride through (LVRT) control method and system device for doubly-fed wind generating set | |
| EP2306607A2 (en) | Device and method to protect an electric power distribution network against current faults | |
| CN102412597A (en) | Low voltage ride through control method and device for a double-fed wind power generation system | |
| CN107039959A (en) | A kind of short trouble limiter based on commutation capacitor electric current nature commutation | |
| CN217335102U (en) | Novel wind power and photovoltaic grid-connected protection device | |
| CN104362672A (en) | Wind power generation system | |
| CN102780231A (en) | Direct-current current source loop-based wind power station converging and grid-connecting method | |
| CN209267278U (en) | A kind of thunder and lightning power generator | |
| Heidary et al. | Wind energy generators fault Current protection: Structures survey | |
| CN114400643B (en) | Stable flexible direct-current power grid topological structure | |
| CN203037813U (en) | Open circuit voltage wave generator | |
| CN111064172A (en) | Protection circuit and variable pitch system | |
| Yan et al. | Research on high voltage ride through of wind turbine based on combination of series impedance divider and parallel high impedance grounding | |
| CN103746399A (en) | Main circuit and method for improving voltage-source transverter DC power-transmission fault ride-through capability | |
| CN201766546U (en) | Wind generating set protector for coping with voltage dip of power grid | |
| CN115313470A (en) | Photovoltaic grid-connected access system | |
| CN106300415A (en) | A kind of low-voltage ride-through method of brushless dual-feedback wind power generator group combination | |
| CN210744758U (en) | Multi-terminal direct-current transmission system based on superconducting current limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |