CN114123133A - Distributed direct-drive wind power access side grounding distance II-segment protection online setting configuration method - Google Patents
Distributed direct-drive wind power access side grounding distance II-segment protection online setting configuration method Download PDFInfo
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- CN114123133A CN114123133A CN202111429852.9A CN202111429852A CN114123133A CN 114123133 A CN114123133 A CN 114123133A CN 202111429852 A CN202111429852 A CN 202111429852A CN 114123133 A CN114123133 A CN 114123133A
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- 238000005259 measurement Methods 0.000 claims abstract description 10
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- 230000001681 protective effect Effects 0.000 claims description 5
- 238000011217 control strategy Methods 0.000 description 2
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- 238000010248 power generation Methods 0.000 description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
Abstract
The invention discloses a distributed direct-drive wind power access side grounding distance II-segment protection online setting configuration method, which comprises the following steps: step S1, after a fault occurs, starting a protection starting element, and acquiring the measurement voltage and the measurement current of a protection installation position by a relay protection device at the distributed direct-drive wind power position; step S2, the fault phase selection element judges whether the fault is a single-phase earth fault, if so, the measured impedance is calculated according to the measured voltage and the measured current, and the output current of the distributed direct-drive wind power after the fault is calculated; step S3, performing online calculation of the fixed value of the grounding distance protection II section according to the output current of the distributed direct-drive wind power; and step S4, judging whether the grounding distance protection II section acts according to the measured impedance and the on-line calculation of the fixed value of the grounding distance protection II section. The invention provides a setting basis and a protection criterion for the distance protection II section of the distributed direct-drive wind power access side of the 110kV line, so that the distance protection II section of the side grounding can protect the whole length of the line.
Description
Technical Field
The invention belongs to the technical field of power systems, and particularly relates to a distributed direct-drive wind power access side grounding distance II-section protection online setting configuration method.
Background
In a traditional power grid, distributed direct-drive wind power access is generally not considered, and distance protection is not configured on a line load side. However, after the distributed direct-drive wind power is connected into a power grid system, the system is not radial any more, the current and power flow directions are not fixed any more, and the distance protection is required to be configured on the line distributed direct-drive wind power side. Because the distributed direct-drive wind power generation generally adopts a fault control strategy for inhibiting negative sequence current, under the condition of symmetrical and asymmetrical faults of a power grid, the distributed direct-drive wind power generation only outputs positive sequence current without negative sequence current or zero sequence current, the fault characteristic is different from the fault characteristic of a conventional alternating current synchronous motor, and the adaptability problem exists in distance protection configuration based on the fault characteristic of the conventional alternating current synchronous motor. Therefore, for the distance protection analysis on the distributed direct-drive wind power transmission line, the fault characteristic of the distributed direct-drive wind power should be considered, in addition, the matching of the distance protection II section and the adjacent line protection should be considered, and a new setting scheme of the grounding distance protection II section needs to be provided accordingly.
Disclosure of Invention
The invention aims to provide an online setting configuration method for the protection of the grounding side II section of the distributed direct-drive wind power access side, so as to provide a setting basis and a protection criterion for the protection of the 110kV line distributed direct-drive wind power access side II section.
In order to solve the technical problem, the invention provides an online setting configuration method for II-segment protection of a grounding distance of a distributed direct-drive wind power access side, which comprises the following steps:
step S1, after a fault occurs, starting a protection starting element, and acquiring the measurement voltage and the measurement current of a protection installation position by a relay protection device at the distributed direct-drive wind power position;
step S2, the fault phase selection element judges whether the fault is a single-phase earth fault, if so, the measured impedance is calculated according to the measured voltage and the measured current, and the output current of the distributed direct-drive wind power after the fault is calculated;
step S3, performing online calculation of a fixed value of the II-section grounding distance protection according to the output current of the distributed direct-drive wind power;
and step S4, judging whether the grounding distance protection II section acts according to the measured impedance and the on-line calculation of the fixed value of the grounding distance protection II section.
Further, in the step S2, according to the measured voltage
And measuring the current
Calculating the measurement impedance Zm:
wherein the content of the first and second substances,
and
the voltage and the phase current of the fault phase are used,
is a zero sequence current, kABAnd the zero sequence compensation coefficient is the AB zero sequence compensation coefficient of the tie line.
Further, calculating the output current of the distributed direct-drive wind power after the fault specifically comprises:
according to the measured voltage
And measuring the current
Calculating the voltage drop degree k of the protective installationUT：
Calculating the output reactive current i of the direct-drive fanq；
Calculating the output active current i of the direct-drive fand；
Calculating output current I of distributed direct-drive wind powerdg。
Further, the dropping degree k of the voltage at the protective installation is calculatedUTThe method comprises the following steps:
wherein the content of the first and second substances,
phase voltage, phase current, Z, for normal operationTIs the impedance of a 110kV transformer.
Further, calculating the output reactive current i of the direct-drive fanqThe method comprises the following steps:
Further, calculating the output active current i of the direct-drive fandThe method comprises the following steps:
Idg maxthe maximum output current is obtained after the distributed direct-drive wind power failure.
Further, the step S3 of performing online calculation of the fixed value of the second segment of the ground distance protection specifically includes:
calculating AB zero sequence compensation coefficient k of tie lineAB＝(ZAB(0)-ZAB(1))/(3ZAB(1))；
Calculating BC zero-sequence compensation coefficient k of downstream lineBC＝(ZBC(0)-ZBC(1))/(3ZBC(1))；
Calculating positive sequence branch coefficients
Calculating zero sequence branch coefficient kb(0)＝(ZS(0)+ZAB(0)+ZT)/ZS(0)；
Calculating the setting impedance of the grounding distance protection II section
Wherein the content of the first and second substances,
in order to be a reliable factor,
setting impedance for the first segment of BC ground distance protection of downstream line, ESFor the mains-side equivalent supply potential, ZS(1)Is positive sequence equivalent impedance Z under the minimum operation mode of the power grid sideS(1)，ZS(1)Is zero sequence equivalent impedance, Z, under the minimum operation mode of the power grid sideAB(1)For the positive sequence impedance of the tie line AB, ZAB(0)For the tie line AB zero sequence impedance, ZBC(1)Positive sequence impedance, Z, for downstream line BCBC(0)Is the downstream line BC zero sequence impedance.
Further, the step S4 specifically includes:
setting impedance on impedance plane
Forming a circle for the diameter when measuring the impedance ZmWhen the grounding distance falls outside the circle, the grounding distance protection section II does not act; if the impedance Z is measuredmWhen falling in the circle, the earth distance protects the second section of time delay
And then, the grounding distance protection II section acts to send a tripping command to the circuit breaker.
Further, grounding distance protection II-section time delay
It was 0.3 s.
The implementation of the invention has the following beneficial effects: the invention provides a setting basis and a protection criterion for the distance protection II section of the distributed direct-drive wind power access side of the 110kV line, so that the distance protection II section of the side grounding can protect the whole length of the line, the adjacent line has a larger protection range, the fault in the area can reliably act, and the fault outside the area can not exceed the misoperation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a typical wind power system with distributed direct drive.
Fig. 2 is a schematic flow chart of a distributed direct-drive wind power access side grounding distance ii-segment protection online setting configuration method according to an embodiment of the present invention.
Fig. 3 is a specific flow diagram of a method for configuring online setting of ii-stage protection of a ground distance of a distributed direct-drive wind power access side according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.
As shown in fig. 1, a typical wind power system with distributed direct drives mainly comprises a power grid side equivalent power source (1), a power grid side equivalent impedance (2), a distributed direct drive wind power source (3), a distributed direct drive wind power local load (4), a 110kV transformer (5), a 110kV tie line AB (6), a relay protection device (7) and a downstream line BC (8). The distributed direct-drive wind power is connected to a tie line AB through a 110kV transformer, the 110kV transformer adopts an YNd11 wiring mode, and the distributed direct-drive wind power adopts a negative sequence current suppression control strategy after a fault.
The system parameters are as follows: grid-side equivalent supply potential ESPositive sequence and zero sequence equivalent impedance Z under minimum operation mode of power grid sideS(1)、ZS(0)110kV transformer impedance ZTPositive and zero sequence impedances Z of interconnection line ABAB(1)、ZAB(0)BC positive-sequence and zero-sequence impedance Z of downstream lineBC(1)、ZBC(0)The maximum output current after the distributed direct-drive wind power fault is Idg max。
Relay protection device (7) are configured with II sections of ground connection distance protection on the connecting line, and II sections of ground connection distance protection cooperate with I sections of ground connection distance protection of downstream circuit BC, do not exceed I sections of protection scope of downstream circuit ground connection distance protection.
Referring to fig. 2, an embodiment of the present invention provides an online setting configuration method for a distributed direct-drive wind power access side ground distance ii-stage protection, including:
step S1, after a fault occurs, starting a protection starting element, and acquiring the measurement voltage and the measurement current of a protection installation position by a relay protection device at the distributed direct-drive wind power position;
step S2, the fault phase selection element judges whether the fault is a single-phase earth fault, if so, the measured impedance is calculated according to the measured voltage and the measured current, and the output current of the distributed direct-drive wind power after the fault is calculated;
step S3, performing online calculation of a fixed value of the II-section grounding distance protection according to the output current of the distributed direct-drive wind power;
and step S4, judging whether the grounding distance protection II section acts according to the measured impedance and the on-line calculation of the fixed value of the grounding distance protection II section.
Specifically, as shown in fig. 3, after the fault occurs, the protection activation element is activated first. Distributed direct-drive wind power relay protection device for obtaining measurement voltage of protection installation position
And measuring the current
Then, whether the fault is a single-phase earth fault is judged by the fault phase selection element. If not, other fault types are required; if yes, according to the measured voltage
And measuring the current
Calculating the measured impedance Zm：
Wherein the content of the first and second substances,
and
the voltage and the phase current of the fault phase are used,
is a zero sequence current.
After the fault type is judged to be the single-phase earth fault, the output current of the distributed direct-drive wind power after the fault is further calculated, and the method mainly comprises the following steps.
Firstly, calculating the drop degree of voltage at a protection installation position:
by measuring voltage
And measuring the current
Voltage drop degree k of protective installation placeUT：
calculating the output reactive current i of the direct-drive fanq：
Calculating the output active current of the direct-drive fan
Calculating distributed direct-drive wind power output current
And is per unit.
After the calculation of the output current of the distributed direct-drive wind power is finished, the on-line calculation of the fixed value of the grounding distance protection II section is carried out, and the method mainly comprises the following steps:
calculating AB zero sequence compensation coefficient k of tie lineAB＝(ZAB(0)-ZAB(1))/(3ZAB(1))；
Calculating BC zero-sequence compensation coefficient k of downstream lineBC＝(ZBC(0)-ZBC(1))/(3ZBC(1))
Calculating positive sequence branch coefficients
Calculating zero sequence branch coefficient kb(0)＝(ZS(0)+ZAB(0)+ZT)/ZS(0)
According to the data, calculating the setting impedance of the grounding distance protection II section
Calculated from the following equation:
wherein the content of the first and second substances,
is a reliability factor;
and setting impedance for the first section of the BC grounding distance protection of the downstream line. When the grounding distance of the downstream line BC is 80% of the total protection length of the I section of the protection,
after completing the on-line calculation of the measured impedance and the fixed value of the grounding distance protection II section, setting the impedance on the impedance plane
Forming a circle for the diameter when measuring the impedance ZmWhen the grounding distance falls outside the circle, the grounding distance protection section II does not act; if the impedance Z is measuredmWhen falling in the circle, the earth distance protects the second section of time delay
And then, the grounding distance protection II section acts to send a tripping command to the circuit breaker. Generally, earth distance protection II stage delay
It may be taken to be 0.3 s.
As can be seen from the above description, the present invention provides the following advantageous effects: the invention provides a setting basis and a protection criterion for the distance protection II section of the distributed direct-drive wind power access side of the 110kV line, so that the distance protection II section of the side grounding can protect the whole length of the line, the adjacent line has a larger protection range, the fault in the area can reliably act, and the fault outside the area can not exceed the misoperation.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A distributed direct-drive wind power access side grounding distance II section protection online setting configuration method is characterized by comprising the following steps:
step S1, after a fault occurs, starting a protection starting element, and acquiring the measurement voltage and the measurement current of a protection installation position by a relay protection device at the distributed direct-drive wind power position;
step S2, the fault phase selection element judges whether the fault is a single-phase earth fault, if so, the measured impedance is calculated according to the measured voltage and the measured current, and the output current of the distributed direct-drive wind power after the fault is calculated;
step S3, carrying out on-line calculation of a fixed value of a grounding distance protection II section according to the output current of the distributed direct-drive wind power;
and step S4, judging whether the grounding distance protection II section acts according to the measured impedance and the on-line calculation of the fixed value of the grounding distance protection II section.
2. The method according to claim 1, wherein in step S2, the voltage is measured
And measuring the current
Calculating the measured impedance Zm：
Wherein the content of the first and second substances,
and
the voltage and the phase current of the fault phase are used,
is a zero sequence current, kABAnd the zero sequence compensation coefficient is the AB zero sequence compensation coefficient of the tie line.
3. The method according to claim 2, wherein calculating the output current of the post-fault distributed direct-drive wind power specifically comprises:
according to the measured voltage
And measuring the current
Calculating the voltage drop degree k of the protective installationUT：
Calculating the output reactive current i of the direct-drive fanq；
Calculating the output active current i of the direct-drive fand；
Calculating output current I of distributed direct-drive wind powerdg。
4. A method according to claim 3, characterized by calculating the degree of voltage sag k at the protective installationUTThe method comprises the following steps:
wherein the content of the first and second substances,
phase voltage, phase current, Z, for normal operationTIs the impedance of a 110kV transformer.
5. The method of claim 4, wherein calculating the direct drive fan output reactive current iqThe method comprises the following steps:
6. The method of claim 5, wherein calculating the direct drive fan output active current idThe method comprises the following steps:
Idgmaxthe maximum output current is obtained after the distributed direct-drive wind power failure.
7. The method of claim 6, wherein calculating the output current I of the distributed direct-drive wind powerdgThe method comprises the following steps:
and is per unit.
8. The method according to claim 7, wherein the step S3 of performing online calculation of the fixed value of the ground-fault distance protection II segment specifically includes:
calculating AB zero sequence compensation coefficient k of tie lineAB＝(ZAB(0)-ZAB(1))/(3ZAB(1))；
Calculating BC zero-sequence compensation coefficient k of downstream lineBC＝(ZBC(0)-ZBC(1))/(3ZBC(1))；
Calculating positive sequence branch coefficients
Calculating zero sequence branch coefficient kb(0)＝(Zs(0)+ZAB(0)+ZT)/Zs(0)；
Calculating the setting impedance of the grounding distance protection II section
Wherein the content of the first and second substances,
in order to be a reliable factor,
setting impedance for downstream line BC grounding distance protection I section, ESFor the mains-side equivalent supply potential, ZS(1)Is positive sequence equivalent impedance Z under the minimum operation mode of the power grid sides(1)，Zs(0)Is zero sequence equivalent impedance, Z, under the minimum operation mode of the power grid sideAB(1)For the positive sequence impedance of the tie line AB, ZAB(0)For the tie line AB zero sequence impedance, ZBC(1)Positive sequence impedance, Z, for downstream line BCBC(0)Is the downstream line BC zero sequence impedance.
9. The method according to claim 8, wherein the step S4 specifically includes:
setting impedance on impedance plane
Forming a circle for the diameter when measuring the impedance ZmWhen the grounding distance falls outside the circle, the grounding distance protection section II does not act; if the impedance Z is measuredmWhen falling within the circle, the grounding distance protects the II section delay
And then, the grounding distance protection II section acts to send a tripping command to the breaker.
10. The method of claim 9, wherein ground distance protection segment II delay
It was 0.3 s.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2008118933A (en) * | 2008-05-13 | 2009-11-20 | Александр Никандорович Висящев (RU) | METHOD FOR DETERMINING THE DAMAGE PLACE ON THE ELECTRIC TRANSMISSION AIR LINES (OPTIONS) |
| CN103730882A (en) * | 2013-12-24 | 2014-04-16 | 西安交通大学 | Current protection system and method for being automatically adapted to distributed power connection |
| US10908202B1 (en) * | 2020-09-15 | 2021-02-02 | North China Electric Power University | High-frequency fault component based distance protection system and method for a transmission line of a renewable energy source system |
| CN112952775A (en) * | 2021-02-26 | 2021-06-11 | 国网河南省电力公司电力科学研究院 | Method for protecting voltage quantity of power distribution network containing distributed photovoltaic power supply |
| CN113437734A (en) * | 2021-08-30 | 2021-09-24 | 国网江西省电力有限公司电力科学研究院 | Fault protection method and device suitable for wind power plant output line |
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- 2021-11-29 CN CN202111429852.9A patent/CN114123133A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2008118933A (en) * | 2008-05-13 | 2009-11-20 | Александр Никандорович Висящев (RU) | METHOD FOR DETERMINING THE DAMAGE PLACE ON THE ELECTRIC TRANSMISSION AIR LINES (OPTIONS) |
| CN103730882A (en) * | 2013-12-24 | 2014-04-16 | 西安交通大学 | Current protection system and method for being automatically adapted to distributed power connection |
| US10908202B1 (en) * | 2020-09-15 | 2021-02-02 | North China Electric Power University | High-frequency fault component based distance protection system and method for a transmission line of a renewable energy source system |
| CN112952775A (en) * | 2021-02-26 | 2021-06-11 | 国网河南省电力公司电力科学研究院 | Method for protecting voltage quantity of power distribution network containing distributed photovoltaic power supply |
| CN113437734A (en) * | 2021-08-30 | 2021-09-24 | 国网江西省电力有限公司电力科学研究院 | Fault protection method and device suitable for wind power plant output line |
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