CN110212583A - The control method of Distribution Network Failure distributed generation resource off-the-line linkage - Google Patents
The control method of Distribution Network Failure distributed generation resource off-the-line linkage Download PDFInfo
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- CN110212583A CN110212583A CN201910555055.1A CN201910555055A CN110212583A CN 110212583 A CN110212583 A CN 110212583A CN 201910555055 A CN201910555055 A CN 201910555055A CN 110212583 A CN110212583 A CN 110212583A
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- power
- distribution network
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- distributed generation
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- 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
-
- 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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of control methods of Distribution Network Failure distributed generation resource off-the-line linkage, belong to electric power system fault process field.It mainly comprises the steps that 1, power distribution network is incorporated into the power networks, 2, measurement distribution network voltage, electric current and frequency, 3, judge whether to meet off-the-line condition, 4, carry out V/F control by micro turbine or energy storage device, 5, carry out off-the-line, then isolated operation.The present invention carries out isolated operation after passing through distributed generation resource Active Splitting, greatly improves the reliability and safety of system power supply.Present invention is mainly used for the power distribution networks containing DG.
Description
Technical field
The invention belongs to electric power system fault process fields, specifically, more particularly to a kind of Distribution Network Failure distributed electrical
The control method of source off-the-line linkage.
Background technique
As mankind's environmental pollution and the mouth benefit of power saving are paid close attention to, the renewable energy such as wind energy, solar energy
Generation technology just gradually develops, and distributed power generation (Distributed Generation, DG) technology becomes to be studied both at home and abroad
Hot spot.Distributed generation resource has many advantages, such as that power supply is flexible, easy for installation, environmentally friendly, and usual DG enhances load side close to user terminal
The reliability of power supply, while can guarantee its power quality.But with increasing, the existing anti-orphan of DG quantity and permeability
Island running protection mode has exposed some shortcomings, such as needs to enhance the requirement to system reserve capacity, Wu Fahe
Reason utilizes the power generation capacity of DG, and common mode is easy to cause to trip, and the power supply reliability of power distribution network is caused to decline etc..
Summary of the invention
It is an object of the invention to overcome drawbacks described above, a kind of control of Distribution Network Failure distributed generation resource off-the-line linkage is provided
Method greatly improves the reliability and safety of system power supply by carrying out isolated operation after distributed generation resource Active Splitting
Property.
The control method of the Distribution Network Failure distributed generation resource off-the-line linkage, comprising the following steps:
(1) power distribution network containing DG is incorporated into the power networks, and acquires the data of power distribution network；
(2) measure each node of power distribution network containing DG voltage, electric current and frequency, and with off-the-line data comparison；
(3) when voltage, electric current and the frequency in step (2) meet off-the-line condition, energy storage device is operated normally；
(4) energy storage device switchs to V/F control by PQ control mode；
(5) energy storage device rated output power is set as PBESSo, and micro turbine rated power is PMTo, and load general power is
Pload, Ppcc are the exchange power on bus, and it is PRESS that energy storage device, which absorbs power,；When Ppcc+PRESS≤PBESSo, into
Row off-the-line, then isolated operation；
(6) in step (5), when Ppcc+PRESS ﹥ PBESSo, isolated island division is first carried out, then carry out off-the-line；
(7) when voltage, electric current and the frequency in step (2) are unable to satisfy off-the-line condition, V/F control is carried out by micro turbine
System；
(8) in step (7), when Ppcc≤PMTo, off-the-line is carried out, then isolated operation；
(9) in step (7), when Ppcc ﹥ PMTo, isolated island division is first carried out, then carry out off-the-line.
Further, the voltage rating of the micro turbine is 10kV, rated frequency 50Hz, and rated output power is
1MVA, rated power factor are 0.8.
Further, the voltage rating of the power distribution network is 110kV, rated frequency 50Hz, and maximum capacity of short circuit is
10000MVA, minimum capacity of short circuit 8000MVA.
Further, the voltage rating of the energy storage device battery is lOkV, rated frequency 50Hz, and rated capacity is
1250kWh, rated output 5MW, rated power factor are 0.8.
Compared with prior art, the beneficial effects of the present invention are:
1, DG has independently-powered ability, after Fault Isolation, using the power supply of DG recovered part important load, significantly
Improve the power supply reliability of system；
2, the present invention is single main power source with energy storage device or micro turbine, meets the power distribution network isolated island containing distributed generation resource
Control system can support power distribution network frequency and voltage, adjust the requirement of power distribution network power-balance when operation, and give full play to difference
The respective advantage of distributed generation resource constructs a power distribution network Active Splitting Control containing distributed generation resource.
Detailed description of the invention
Fig. 1 is the principle of the present invention figure.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
As shown in Figure 1, the control method of Distribution Network Failure distributed generation resource off-the-line linkage, comprising the following steps:
(1) power distribution network containing DG is incorporated into the power networks, and acquires the data of power distribution network；
(2) measure each node of power distribution network containing DG voltage, electric current and frequency, and with off-the-line data comparison；
(3) when voltage, electric current and the frequency in step (2) meet off-the-line condition, energy storage device is operated normally；
(4) energy storage device switchs to V/F control by PQ control mode；
(5) energy storage device rated output power is set as PBESSo, and micro turbine rated power is PMTo, and load general power is
Pload, Ppcc are the exchange power on bus, and it is PRESS that energy storage device, which absorbs power,；When Ppcc+PRESS≤PBESSo, into
Row off-the-line, then isolated operation；
(6) in step (5), when Ppcc+PRESS ﹥ PBESSo, isolated island division is first carried out, then carry out off-the-line；
(7) when voltage, electric current and the frequency in step (2) are unable to satisfy off-the-line condition, V/F control is carried out by micro turbine
System；
(8) in step (7), when Ppcc≤PMTo, off-the-line is carried out, then isolated operation；
(9) in step (7), when Ppcc ﹥ PMTo, isolated island division is first carried out, then carry out off-the-line.
In the use of the present invention, the voltage rating of micro turbine is 10kV, rated frequency 50Hz, rated output power is
1MVA, rated power factor are 0.8；The voltage rating of power distribution network is 110kV, rated frequency 50Hz, and maximum capacity of short circuit is
10000MVA, minimum capacity of short circuit 8000MVA；The voltage rating of energy storage device battery is lOkV, rated frequency 50Hz, specified
Capacity is 1250kWh, and rated output 5MW, rated power factor is 0.8.
Claims (4)
1. a kind of control method of Distribution Network Failure distributed generation resource off-the-line linkage, it is characterised in that: the following steps are included:
(1) power distribution network containing DG is incorporated into the power networks, and acquires the data of power distribution network；
(2) measure each node of power distribution network containing DG voltage, electric current and frequency, and with off-the-line data comparison；
(3) when voltage, electric current and the frequency in step (2) meet off-the-line condition, energy storage device is operated normally；
(4) energy storage device switchs to V/F control by PQ control mode；
(5) energy storage device rated output power is set as PBESSo, micro turbine rated power is PMTo, and load general power is Pload,
Ppcc is the exchange power on bus, and it is PRESS that energy storage device, which absorbs power,；When Ppcc+PRESS≤PBESSo, off-the-line is carried out,
Then isolated operation；
(6) in step (5), when Ppcc+PRESS ﹥ PBESSo, isolated island division is first carried out, then carry out off-the-line；
(7) when voltage, electric current and the frequency in step (2) are unable to satisfy off-the-line condition, V/F control is carried out by micro turbine；
(8) in step (7), when Ppcc≤PMTo, off-the-line is carried out, then isolated operation；
(9) in step (7), when Ppcc ﹥ PMTo, isolated island division is first carried out, then carry out off-the-line.
2. the control method of Distribution Network Failure distributed generation resource off-the-line linkage according to claim 1, it is characterised in that: described
The voltage rating of micro turbine is 10kV, rated frequency 50Hz, rated output power 1MVA, and rated power factor is 0.8.
3. the control method of Distribution Network Failure distributed generation resource off-the-line linkage according to claim 1, it is characterised in that: described
The voltage rating of power distribution network is 110kV, and rated frequency 50Hz, maximum capacity of short circuit is 10000MVA, minimum capacity of short circuit
8000MVA。
4. the control method of Distribution Network Failure distributed generation resource off-the-line linkage according to claim 1, it is characterised in that: described
The voltage rating of energy storage device battery be lOkV, rated frequency 50Hz, rated capacity 1250kWh, rated output 5MW,
Rated power factor is 0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555055.1A CN110212583A (en) | 2019-06-25 | 2019-06-25 | The control method of Distribution Network Failure distributed generation resource off-the-line linkage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910555055.1A CN110212583A (en) | 2019-06-25 | 2019-06-25 | The control method of Distribution Network Failure distributed generation resource off-the-line linkage |
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| CN110212583A true CN110212583A (en) | 2019-09-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010259169A (en) * | 2009-04-22 | 2010-11-11 | Mitsubishi Electric Corp | Protective relay device |
| CN108667133A (en) * | 2018-05-17 | 2018-10-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Main power source switching method, apparatus and system |
| CN109842148A (en) * | 2018-02-01 | 2019-06-04 | 大全集团有限公司 | A kind of micro-grid connection turns the stable control method of isolated operation mode |
-
2019
- 2019-06-25 CN CN201910555055.1A patent/CN110212583A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010259169A (en) * | 2009-04-22 | 2010-11-11 | Mitsubishi Electric Corp | Protective relay device |
| CN109842148A (en) * | 2018-02-01 | 2019-06-04 | 大全集团有限公司 | A kind of micro-grid connection turns the stable control method of isolated operation mode |
| CN108667133A (en) * | 2018-05-17 | 2018-10-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Main power source switching method, apparatus and system |
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Application publication date: 20190906 |