CN210780110U - 750kW wind generating set is reactive power compensation arrangement on spot - Google Patents
750kW wind generating set is reactive power compensation arrangement on spot Download PDFInfo
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- CN210780110U CN210780110U CN201921815825.3U CN201921815825U CN210780110U CN 210780110 U CN210780110 U CN 210780110U CN 201921815825 U CN201921815825 U CN 201921815825U CN 210780110 U CN210780110 U CN 210780110U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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
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Abstract
The utility model discloses a 750kW wind generating set is reactive power compensation arrangement on spot relates to wind power generation technical field, and the device comprises four ways capacitance compensation return circuit, and every group compensation return circuit has all established ties a reactor, and a temperature detect switch all is equipped with to every reactor inside, and circuit breaker QF is as this compensation arrangement's input and exit control. The wind generating set can meet the reactive requirement of the unit on the capacitive property by inputting different compensation loops, the reactive compensation device aims at meeting the requirement of on-site reactive compensation of a 750kW wind generating set based on the golden wind technology, has the characteristics of simple structure, easiness in installation, stable operation, low cost, no maintenance, long service life and the like, and can adopt a selection mode of realizing functions by pure hardware and realizing the functions by matching software and hardware according to the requirements of customers.
Description
Technical Field
The utility model relates to a wind power generation technical field especially relates to 750kW wind generating set reactive power compensation arrangement on spot.
Background
At present, a 750kW wind generating set produced by Xinjiang golden wind science and technology Limited company, a mainstream wind generating set manufacturer in China, adopts a squirrel cage asynchronous motor to carry out grid-connected power generation, generates a large amount of inductive reactive current and inductive reactive power in the running process of the set, and leads to low power factor of the set, increases the line loss of a bus line in a wind power plant, reduces the generation income, and possibly leads to the evaluation of the wind power plant by a power grid company. Golden wind science and technology 750kW unit has configured two kinds of reactive power compensator on the spot, but all has separately defect, and the fault rate is very high, the utility model discloses can effectively realize the reactive power compensation of unit, have the fault rate low, simple structure, with low costs, non-maintaining characteristics.
Disclosure of Invention
An object of the utility model is to overcome prior art's is not enough to a 750kW wind generating set is reactive power compensation's device on spot is provided, and it can optimize wind generating set reactive power compensation, has realized the unit reactive power compensation on spot, does not influence unit operating stability.
The utility model adopts the following technical scheme:
the on-site reactive power compensation device of the 750kW wind generating set comprises an AC690V power supply, a circuit breaker QF and four paths, wherein the first path is connected with one end of a branch reactor L1 in series after passing through a contact of a capacitor contactor KM1, the other end of the branch reactor L1 is connected with a discharge resistor R and then connected with a capacitor bank C1 in series, the capacitor bank C1 is connected with three capacitors in a triangular mode, one end of a temperature switch Kt1 is connected with one end of a coil of an intermediate relay K1, the other end of the temperature switch Kt1 is connected with a first output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt1 is installed inside the branch reactor L1, the other end of the coil of the intermediate relay K1 is connected with a control zero line N, one end of a coil of a capacitor contactor KM1 is connected with;
the second path is connected with one end of a branch reactor L2 in series after passing through a contact of a capacitor contactor KM2, the three phases at the other end of the branch reactor L2 are respectively connected with a discharge resistor R and then connected with a capacitor bank C2 in series, the capacitor bank C2 is formed by connecting three capacitors in a triangular mode, one end of a temperature switch Kt2 is connected with one end of a coil of an intermediate relay K2, the other end of the temperature switch Kt2 is connected with a first output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt2 is installed inside the branch reactor L2, the other end of the coil of the intermediate relay K2 is connected with a control zero line N, one end of a coil of a capacitor contactor KM2 is connected with a control live line L;
a third path is connected with one end of a branch reactor L3 in series after being contacted by a capacitor contactor KM3, a discharging resistor R is connected between three phases at the other end of the branch reactor L3 and then connected with a capacitor bank C3 in series, the capacitor bank C3 is formed by connecting three capacitors in a triangular mode, one end of a temperature switch Kt3 is connected with one end of a coil of an intermediate relay K3, the other end of the temperature switch Kt3 is connected with a second output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt3 is installed inside the branch reactor L3, the other end of the coil of the intermediate relay K3 is connected with a control zero line N, one end of a coil of a capacitor contactor KM3 is connected with a control live line L after being contacted by;
the fourth path is connected with one end of a branch reactor L4 in series after being contacted with a capacitor contactor KM4, a discharge resistor R is connected between three phases at the other end of the branch reactor L4 and then connected with a capacitor bank C4 in series, the capacitor bank C4 is connected with three capacitors in a triangular mode, one end of a temperature switch Kt4 is connected with one end of a coil of an intermediate relay K4, the other end of the temperature switch Kt4 is connected with a third output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt4 is installed inside the branch reactor L4, the other end of the coil of the intermediate relay K4 is connected with a control zero line N, one end of the coil of a capacitor contactor KM4 is connected with a control live line L after being contacted with the intermediate.
The capacities of the capacitor banks C1, C2, C3 and C4 are 75Kvar, 25 Kvar and 50 Kvar respectively.
The capacity of each series reactor L1-L4 is matched with the capacity of each capacitor bank C1-C4 respectively.
The utility model has the advantages that:
the utility model discloses can make the capacitive reactive compensation volume of capacitor bank be close to or equal with the inductive reactive power volume that wind generating set produced through the mode of putting into and cutting out in groups, the series reactor can reduce the big current impact in the twinkling of an eye that the condenser produced in the input process to can play the effect of restraining the harmonic, temperature switch Kt can break off the control circuit of this branch road when the reactor temperature is too high, play the effect of excess temperature protection; the reactive power compensation device has the characteristics of simple structure, stable operation, low failure rate, low cost and no maintenance.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
wherein: a. B, C is a three-phase AC bus power supply; a1 and A2 are two terminals of the coil of the capacitance contactor respectively.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, in the on-site reactive power compensation device for a 750kW wind generating set, an AC690V power supply is divided into four paths after passing through a breaker QF, the first path is connected in series with one end of a branch reactor L1 after passing through a contact point of a capacitor contactor KM1, the three phases at the other end of the branch reactor L1 are respectively connected with a discharge resistor R and then connected in series with a capacitor bank C1, the capacitor bank C1 is connected by three capacitors in a triangular manner, one end of a coil of a temperature switch Kt1 is connected with one end of an intermediate relay K1, the other end of the temperature switch Kt1 is connected with a first output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt1 is installed inside the branch reactor L1, the other end of the coil of the intermediate relay K1 is connected with a control zero line N, one end of a coil of a;
the second path is connected with one end of a branch reactor L2 in series after passing through a contact of a capacitor contactor KM2, the three phases at the other end of the branch reactor L2 are respectively connected with a discharge resistor R and then connected with a capacitor bank C2 in series, the capacitor bank C2 is formed by connecting three capacitors in a triangular mode, one end of a temperature switch Kt2 is connected with one end of a coil of an intermediate relay K2, the other end of the temperature switch Kt2 is connected with a first output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt2 is installed inside the branch reactor L2, the other end of the coil of the intermediate relay K2 is connected with a control zero line N, one end of a coil of a capacitor contactor KM2 is connected with a control live line L;
a third path is connected with one end of a branch reactor L3 in series after being contacted by a capacitor contactor KM3, a discharging resistor R is connected between three phases at the other end of the branch reactor L3 and then connected with a capacitor bank C3 in series, the capacitor bank C3 is formed by connecting three capacitors in a triangular mode, one end of a temperature switch Kt3 is connected with one end of a coil of an intermediate relay K3, the other end of the temperature switch Kt3 is connected with a second output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt3 is installed inside the branch reactor L3, the other end of the coil of the intermediate relay K3 is connected with a control zero line N, one end of a coil of a capacitor contactor KM3 is connected with a control live line L after being contacted by;
the fourth path is connected with one end of a branch reactor L4 in series after being contacted with a capacitor contactor KM4, a discharge resistor R is connected between three phases at the other end of the branch reactor L4 and then connected with a capacitor bank C4 in series, the capacitor bank C4 is connected with three capacitors in a triangular mode, one end of a temperature switch Kt4 is connected with one end of a coil of an intermediate relay K4, the other end of the temperature switch Kt4 is connected with a third output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt4 is installed inside the branch reactor L4, the other end of the coil of the intermediate relay K4 is connected with a control zero line N, one end of the coil of a capacitor contactor KM4 is connected with a control live line L after being contacted with the intermediate.
The capacities of the capacitor banks C1, C2, C3 and C4 are 75Kvar, 25 Kvar and 50 Kvar respectively.
The capacity of each series reactor L1-L4 is matched with the capacity of each capacitor bank C1-C4 respectively.
In the utility model, 4 capacitor contactors KM1-KM4 are used for putting and cutting capacitors; 12 discharge resistors R for discharging the capacitor after power failure; the circuit breaker QF is used as a control switch of a reactive power compensation primary loop power supply of the wind generating set; the branch reactor L1-L4 is used for: (1) suppressing inrush current when the capacitor is put into use and protecting equipment; (2) suppressing harmonic waves; (3) a passive filter loop is formed with the capacitor to filter harmonic current; the capacitor banks C1-C4 are used for generating capacitive reactive power and realizing the reactive power compensation function; and 4 temperature switches Kt1-Kt4 are used for over-temperature protection of the reactor. The utility model discloses reactive power compensation device is used for golden wind science and technology 750KW wind generating set reactive power compensation's on the spot technical transformation, matches but not limited to golden wind science and technology 750kW wind generating set and uses. When the unit is connected to the grid, the capacitor bank C1 and the capacitor bank C2 are firstly put into the grid.
Claims (3)
1.750kW wind generating set is reactive power compensation arrangement on spot, its characterized in that: an AC690V power supply is divided into four paths after passing through a breaker QF, the first path is connected with one end of a branch reactor L1 in series after passing through a contact of a capacitor contactor KM1, a discharging resistor R is respectively connected between three phases at the other end of the branch reactor L1 and then connected with a capacitor bank C1 in series, the capacitor bank C1 is formed by connecting three capacitors in a triangular mode, one end of a coil of a temperature switch Kt1 is connected with one end of an intermediate relay K1, the other end of the temperature switch Kt1 is connected with a first output point of a switching value output module SM322 of a wind generating set, the temperature switch Kt1 is installed inside the branch reactor L1, the other end of the coil of the intermediate relay K1 is connected with a control zero line N, one end of a coil of a capacitor contactor KM1 is connected with;
the second path is connected with one end of a branch reactor L2 in series after passing through a contact of a capacitor contactor KM2, the three phases at the other end of the branch reactor L2 are respectively connected with a discharge resistor R and then connected with a capacitor bank C2 in series, the capacitor bank C2 is formed by connecting three capacitors in a triangular mode, one end of a temperature switch Kt2 is connected with one end of a coil of an intermediate relay K2, the other end of the temperature switch Kt2 is connected with a first output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt2 is installed inside the branch reactor L2, the other end of the coil of the intermediate relay K2 is connected with a control zero line N, one end of a coil of a capacitor contactor KM2 is connected with a control live line L;
a third path is connected with one end of a branch reactor L3 in series after being contacted by a capacitor contactor KM3, a discharging resistor R is connected between three phases at the other end of the branch reactor L3 and then connected with a capacitor bank C3 in series, the capacitor bank C3 is formed by connecting three capacitors in a triangular mode, one end of a temperature switch Kt3 is connected with one end of a coil of an intermediate relay K3, the other end of the temperature switch Kt3 is connected with a second output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt3 is installed inside the branch reactor L3, the other end of the coil of the intermediate relay K3 is connected with a control zero line N, one end of a coil of a capacitor contactor KM3 is connected with a control live line L after being contacted by;
the fourth path is connected with one end of a branch reactor L4 in series after being contacted with a capacitor contactor KM4, a discharge resistor R is connected between three phases at the other end of the branch reactor L4 and then connected with a capacitor bank C4 in series, the capacitor bank C4 is connected with three capacitors in a triangular mode, one end of a temperature switch Kt4 is connected with one end of a coil of an intermediate relay K4, the other end of the temperature switch Kt4 is connected with a third output point of a switching value output module SM322 of the wind generating set, the temperature switch Kt4 is installed inside the branch reactor L4, the other end of the coil of the intermediate relay K4 is connected with a control zero line N, one end of the coil of a capacitor contactor KM4 is connected with a control live line L after being contacted with the intermediate.
2. The on-site reactive power compensation device of a 750kW wind generating set according to claim 1, wherein: the capacities of the capacitor banks C1, C2, C3 and C4 are 75Kvar, 25 Kvar and 50 Kvar respectively.
3. The on-site reactive power compensation device of a 750kW wind generating set according to claim 1, wherein: the capacities of the branch reactors L1-L4 are respectively matched with the capacities of the capacitor banks C1-C4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921815825.3U CN210780110U (en) | 2019-10-28 | 2019-10-28 | 750kW wind generating set is reactive power compensation arrangement on spot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921815825.3U CN210780110U (en) | 2019-10-28 | 2019-10-28 | 750kW wind generating set is reactive power compensation arrangement on spot |
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| Publication Number | Publication Date |
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| CN210780110U true CN210780110U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921815825.3U Active CN210780110U (en) | 2019-10-28 | 2019-10-28 | 750kW wind generating set is reactive power compensation arrangement on spot |
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| CN (1) | CN210780110U (en) |
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- 2019-10-28 CN CN201921815825.3U patent/CN210780110U/en active Active
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