CN104808093B - Anti- isolated island protection test circuit and method based on constant impedance load simulation - Google Patents
Anti- isolated island protection test circuit and method based on constant impedance load simulation Download PDFInfo
- Publication number
- CN104808093B CN104808093B CN201510242085.9A CN201510242085A CN104808093B CN 104808093 B CN104808093 B CN 104808093B CN 201510242085 A CN201510242085 A CN 201510242085A CN 104808093 B CN104808093 B CN 104808093B
- Authority
- CN
- China
- Prior art keywords
- grid
- connected photovoltaic
- power
- monitoring unit
- constant impedance
- 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
- 238000004088 simulation Methods 0.000 title claims abstract description 50
- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
Test circuit is protected it is an object of the invention to provide a kind of anti-isolated island based on constant impedance load simulation, the circuit includes constant impedance load simulation unit, monitoring unit, measuring unit；The output end of the input termination grid-connected photovoltaic inverter of the measuring unit；First output termination 0.4kV power distribution networks of the measuring unit；By-pass switch is parallel between the input of constant impedance load simulation unit and the first output end；The first input end of the monitoring unit connects the second output of measuring unit；The output end of second input termination constant impedance load simulation unit of the monitoring unit；Second output end of the 3rd input termination by-pass switch of the monitoring unit.Constant impedance load simulation unit accurately simulates the part throttle characteristics of RLC loads in parallel; the active power that grid-connected photovoltaic inverter is exported is fed to power distribution network with unity power factor; it is the anti-isolated island protection of grid-connected photovoltaic inverter to ensure what is triggered in test process, without the advantages of substantially heating and device are compact.
Description
Technical field
The present invention relates to a kind of test circuit, particularly a kind of anti-isolated island protection test electricity based on constant impedance load simulation
Road.
Background technology
As distributed photovoltaic power is in a large amount of accesses of power distribution network, the possibility for occurring unplanned property isolated island also increases therewith
Plus.In the event of unplanned property isolated island, the safety of distributed photovoltaic power " power transmission " serious threat electric power operation maintenance personnel.Distribution
Formula photo-voltaic power supply is grid-connected using inverter interface, and in order to prevent unplanned property isolated island, grid-connected photovoltaic inverter must match somebody with somebody
Put anti-isolated island defencive function.At present, generally the anti-isolated island of grid-connected photovoltaic inverter is protected using the scheme loaded based on adjustable RLC
Protective function carries out test checking, have that device profile is excessive, need powerful fan to be radiated, can not realize feedback save,
Long-play degree of regulation declines and is difficult to accesses the anti-of scene development grid-connected photovoltaic inverter in distributed photovoltaic power generation
The problems such as isolated island protects test job.
Using the active power exported based on power electronic equipment real-time tracking grid-connected photovoltaic inverter, RLC is accurately simulated
The part throttle characteristics of constant impedance load, it is ensured that the anti-isolated island protection of grid-connected photovoltaic inverter is triggered in test process, electric energy is realized
Feedback energy-conservation, without substantially heating and device it is compact, with remarkable advantage.
The content of the invention
Anti- isolated island protection work(of the invention in order to solve using the scheme loaded based on adjustable RLC to grid-connected photovoltaic inverter
Test checking can be carried out, have that device profile is excessive, need powerful fan to be radiated, feedback energy-conservation can not be realized, it is long when
Between runing adjustment precise decreasing and be difficult to distributed photovoltaic power generation access scene carry out grid-connected photovoltaic inverter anti-isolated island
The problem of protecting test job, proposes a kind of anti-isolated island protection test circuit based on constant impedance load simulation.
The present invention is realized using following technical scheme：Anti- isolated island protection test circuit based on constant impedance load simulation, its
It is characterised by：Including constant impedance load simulation unit, monitoring unit and measuring unit；The first input end of the measuring unit connects
The output of grid-connected photovoltaic inverter；First output end of the second input termination monitoring unit of the measuring unit；It is described
The first output termination constant impedance load simulation unit of measuring unit；First output of the constant impedance load simulation unit
Connect power distribution network；Second output of the constant impedance load simulation unit connects the input of monitoring unit second；The by-pass switch is simultaneously
It is coupled between the input of constant impedance load simulation unit and the first output end；Second output termination of the monitoring unit is described
One input of by-pass switch.
Further, the constant impedance load simulation unit is that a three-phase independence full-bridge type AC-DC-AC based on IGBT is changed
Flow device, including full-bridge type AC-DC rectification circuits and full-bridge type DC-AC inverter circuits；The AC-DC rectification circuits are used to test
The part throttle characteristics of the RLC loads in parallel of the anti-isolated island protection of grid-connected photovoltaic inverter；The full-bridge type DC-AC inverter circuits will be inputted
The active power that end absorbs is fed to power distribution network with unity power factor.
In an embodiment of the present invention, in addition to a host computer interface, the 3rd input of the monitoring unit with it is described
Host computer interface is connected.
The present invention also provides a kind of survey based on the above-mentioned anti-isolated island protection test circuit based on constant impedance load simulation
Method for testing：Comprise the following steps：Step S1：The closure that sends instructions under monitoring unit by-pass switch, starts grid-connected photovoltaic inverter；Step
Rapid S2：Unit to be monitored detect grid-connected photovoltaic inverter output active power it is steady after, monitoring unit send test instruction；
Step S3：Artifical resistance value R, inductance value L, the capacitance C of parallel connection RLC loads are calculated by monitoring unit, and causes RLC consumption
Reactive power is equal to the reactive power that grid-connected photovoltaic inverter is exported, and the active power of RLC consumption is equal to tested photovoltaic generation system
The quality factor of RLC resonance circuits are set to 1 ± 0.2 by the active power of system output；Step S4：By under step S3 result of calculations
Constant impedance load simulation unit is sent to, when the active power that grid-connected photovoltaic inverter is exported passes through load simulation unit feeding distribution
Net and when flowing through the fundamental current of by-pass switch and being less than the 5% of grid-connected photovoltaic inverter output current, it is disconnected that monitoring unit sends instruction
Open by-pass switch；Step S5：After by-pass switch is disconnected, monitoring unit start recording test process, while electrical quantity is believed
The host computer outside test circuit is sent on breath；Step S6：Monitoring unit presets a setting time, if in setting time
The active power for detecting grid-connected photovoltaic inverter output drops to zero, and monitoring unit sends instruction block load simulation unit
Water conservancy diversion device, test result is preserved by host computer, goes to step S7；If exceeding setting time and grid-connected photovoltaic inverter being exported
Active power have not degraded to zero, monitoring unit sends instruction and terminates test process, adjusts LC so that the idle work(of LC consumption
Rate changes ± 2%, return to step S4 every time；Step S7：Test result is analyzed, the anti-orphan of grid-connected photovoltaic inverter is judged
Whether island protection meets requirement.
Further, step S3 also includes step in detail below：Step S31：Inputted according to full-bridge type AC-DC rectification circuits
The virtual value E of the voltage at end and the active-power P of tested grid-connected photovoltaic inverter outputpWith reactive power Pq, calculating simulation
Resistance value R：R=E2/PpIf, reactive power PqJust, to calculate idle inductance value Lq：Lq= E2/ωPp, it is otherwise Lq=0, if
Reactive power PqIt is negative, calculates idle capacitance Cq：Cq= Pp /ωE2, it is otherwise Cq=0；Step S32:According to electricity during test
Press frequencies omega, the setting value Q of quality factor, artifical resistance value R and idle inductance value Lq, calculating simulation inductance value L：L= Lq+R/
ωQ；Step S33：According to the virtual value E of the voltage of full-bridge type AC-DC rectification circuit input ends, tested grid-connected photovoltaic inversion
The active-power P of device outputp, quality factor setting value Q and test when electric voltage frequency ω, if PqFor just, calculating simulation is electric
Capacitance C：C= Q /ωR - Pp /ωE2+ Cq；Step S34：Artifical resistance value R, inductance value L, the electric capacity obtained according to calculating
Value C and full-bridge type AC-DC rectification circuit input ends voltage e, set up the equation equation of Parallel RLC Circuit：iR= e2/ R, e=
LdiL/ dt, iC=Cde/dt；Step S35：Equation equation in discretization step S34, obtains iR_n+1= en 2/ R, iL_n+1= 2πen/N
ωL+iL_n, iC_n+1= NωC(en- en-1N is each of the voltage of full-bridge type AC-DC rectification circuit input ends in the π of)/2, formula
The sampling number of cycle；Step S36：Choose the reference value of the input current of full-bridge type AC-DC rectification circuit input ends：icov_ref
= iR_n+1+ iL_n+1+ iC_n+1；Step S37：The input current controlling unit adoption rate resonance of full-bridge type AC-DC rectification circuits
With Voltage Feedback compensation, realize to icov_refAccurate tracking, the part throttle characteristics of accurate simulation parallel connection RLC constant impedance loads；Step
Rapid S38：Stable full-bridge type DC-AC inverter circuit DC voltages, control the output current of feedback end, by grid-connected photovoltaic inverter
The active power of output is fed back to power distribution network with unity power factor.
The present invention has advantages below compared with prior art：Using AC-DC and DC-AC Two Stages, three-phase independence, mould
The constant impedance load simulation unit of blocking structure is accurately simulated for the anti-isolated island protection of test distributed grid-connected photovoltaic inverter
The part throttle characteristics of RLC loads in parallel, realizes electric energy feedback, is radiated without powerful fan, device compact appearance, modularization
Structure can fast splice, and be easy to access the anti-isolated island protection test that grid-connected photovoltaic inverter is carried out at scene in distributed photovoltaic power generation
Work.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is constant impedance load simulation cellular construction schematic diagram.
Fig. 3 is parallel connection RLC load models.
Fig. 4 is the flow chart of method of testing of the present invention.
Embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Referring to Fig. 1, the present invention provides a kind of anti-isolated island protection test circuit based on constant impedance load simulation, test electricity
Road includes constant impedance load simulation unit, monitoring unit and measuring unit；The first input end of the measuring unit connects grid-connected light
Lie prostrate the output of inverter；First output end of the second input termination monitoring unit of the measuring unit；The measurement is single
The first output termination constant impedance load simulation unit of member；First output of the constant impedance load simulation unit connects distribution
Net；Second output of the constant impedance load simulation unit connects the input of monitoring unit second；The by-pass switch is parallel to fixed
Between the input of resistive load analogue unit and the first output end；The second output termination bypass of the monitoring unit is opened
The input closed.
Further, the constant impedance load simulation unit is that a three-phase independence full-bridge type AC-DC-AC based on IGBT is changed
Flow device, including full-bridge type AC-DC rectification circuits and full-bridge type DC-AC inverter circuits.The structure ginseng of constant impedance load simulation unit
See Fig. 2.AC-DC rectification circuits are used for the part throttle characteristics for testing the RLC loads in parallel of the anti-isolated island protection of grid-connected photovoltaic inverter, and
Join RLC load models as shown in Figure 3.The active power that the full-bridge type DC-AC inverter circuits absorb input is with specific work
Rate factor is fed to 0.4kV power distribution networks.
Preferably the test circuit also include a host computer interface, the 3rd input of the monitoring unit with it is described on
Position machine interface connection.
The present invention also provides a kind of survey based on the above-mentioned anti-isolated island protection test circuit based on constant impedance load simulation
Method for testing：Comprise the following steps：Step S1：The closure that sends instructions under monitoring unit by-pass switch, starts grid-connected photovoltaic inverter；Step
Rapid S2：Unit to be monitored detect grid-connected photovoltaic inverter output active power it is steady after, monitoring unit send test instruction；
Step S3：Artifical resistance value R, inductance value L, the capacitance C of parallel connection RLC loads are calculated by monitoring unit, and causes RLC consumption
Reactive power is equal to the reactive power that grid-connected photovoltaic inverter is exported, and the active power of RLC consumption is equal to tested photovoltaic generation system
The quality factor of RLC resonance circuits are set to 1 ± 0.2 by the active power of system output；Step S4：By under step S3 result of calculations
Constant impedance load simulation unit is sent to, when the active power that grid-connected photovoltaic inverter is exported passes through load simulation unit feeding distribution
Net and when flowing through the fundamental current of by-pass switch and being less than the 5% of grid-connected photovoltaic inverter output current, it is disconnected that monitoring unit sends instruction
Open by-pass switch；Step S5：After by-pass switch is disconnected, monitoring unit start recording test process, while electrical quantity is believed
The host computer outside test circuit is sent on breath；Step S6：Monitoring unit presets a setting time, if in setting time
The active power for detecting grid-connected photovoltaic inverter output drops to zero, and monitoring unit sends instruction block load simulation unit
Water conservancy diversion device, test result is preserved by host computer, goes to step S7；If exceeding setting time and grid-connected photovoltaic inverter being exported
Active power have not degraded to zero, monitoring unit sends instruction and terminates test process, adjusts LC so that the idle work(of LC consumption
Rate changes ± 2%, return to step S4 every time；Step S7：Test result is analyzed, the anti-orphan of grid-connected photovoltaic inverter is judged
Whether island protection meets requirement.The flow chart of the present invention is referring to Fig. 4.
Further, step S3 also includes step in detail below：Step S31：Inputted according to full-bridge type AC-DC rectification circuits
The virtual value E of the voltage at end and the active-power P of tested grid-connected photovoltaic inverter outputpWith reactive power Pq, calculating simulation
Resistance value R：R=E2/PpIf, reactive power PqJust, to calculate idle inductance value Lq：Lq= E2/ωPp, it is otherwise Lq=0, if
Reactive power PqIt is negative, calculates idle capacitance Cq：Cq= Pp /ωE2, it is otherwise Cq=0；Step S32:According to electricity during test
Press frequencies omega, the setting value Q of quality factor, artifical resistance value R and idle inductance value Lq, calculating simulation inductance value L：L= Lq+R/
ωQ；Step S33：According to the virtual value E of the voltage of full-bridge type AC-DC rectification circuit input ends, tested grid-connected photovoltaic inversion
The active-power P of device outputp, quality factor setting value Q and test when electric voltage frequency ω, if PqFor just, calculating simulation is electric
Capacitance C：C= Q /ωR - Pp /ωE2+ Cq；Step S34：Artifical resistance value R, inductance value L, the electric capacity obtained according to calculating
Value C and full-bridge type AC-DC rectification circuit input ends voltage e, set up the equation equation of Parallel RLC Circuit：iR= e2/ R, e=
LdiL/ dt, iC=Cde/dt；Step S35：Equation equation in discretization step S34, obtains iR_n+1= en 2/ R, iL_n+1= 2πen/N
ωL+iL_n, iC_n+1= NωC(en- en-1N is each of the voltage of full-bridge type AC-DC rectification circuit input ends in the π of)/2, formula
The sampling number of cycle；Step S36：Choose the reference value of the input current of full-bridge type AC-DC rectification circuit input ends：icov_ref
= iR_n+1+ iL_n+1+ iC_n+1；Step S37：The input current controlling unit adoption rate resonance of full-bridge type AC-DC rectification circuits
With Voltage Feedback compensation, realize to icov_refAccurate tracking, the part throttle characteristics of accurate simulation parallel connection RLC constant impedance loads；Step
Rapid S38：Stable full-bridge type DC-AC inverter circuit DC voltages, control the output current of feedback end, by grid-connected photovoltaic inverter
The active power of output is fed back to power distribution network with unity power factor.Those skilled in the art are found out logical by step S35, S36
Cross the electric current, magnitude of voltage and sampling period of a sampled point, you can extrapolate the current reference value of subsequent time.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (2)
1. a kind of anti-isolated island protection method of testing based on constant impedance load simulation, it is characterised in that：Comprise the following steps：
Step S1：The closure that sends instructions under monitoring unit by-pass switch, starts grid-connected photovoltaic inverter；
Step S2：Unit to be monitored detect grid-connected photovoltaic inverter output active power it is steady after, monitoring unit sends survey
Examination instruction；
Step S3：Artifical resistance value R, inductance value L, the capacitance C of parallel connection RLC loads are calculated by monitoring unit, and RLC is disappeared
The reactive power of consumption is equal to the reactive power that grid-connected photovoltaic inverter is exported, and the active power of RLC consumption is equal to tested photovoltaic hair
The quality factor of RLC resonance circuits are set to 1 ± 0.2 by the active power of electric system output；
Step S4：Step S3 result of calculations are issued to constant impedance load simulation unit, when having that grid-connected photovoltaic inverter is exported
Work(power by load simulation unit feed power distribution network and flow through by-pass switch fundamental current be less than grid-connected photovoltaic inverter it is defeated
When going out the 5% of electric current, monitoring unit sends instruction and disconnects by-pass switch；
Step S5：After by-pass switch is disconnected, carries out anti-isolated island protection and test, monitoring unit start recording test process, together
When by the host computer being sent in electric quantity information outside test circuit；
Step S6：Monitoring unit presets a setting time, if detecting grid-connected photovoltaic inverter output in setting time
Active power drop to zero, monitoring unit sends the water conservancy diversion device of instruction block load simulation unit, is preserved and surveyed by host computer
Test result, goes to
Step S7；If being had not degraded more than the active power that setting time and grid-connected photovoltaic inverter are exported to zero, monitoring unit
Send instruction and terminate test process, adjust LC so that the reactive power of LC consumption changes ± 2%, return to step S4 every time；
Step S7：Test result is analyzed, judges whether the anti-isolated island protection of grid-connected photovoltaic inverter meets requirement.
2. the anti-isolated island protection method of testing according to claim 1 based on constant impedance load simulation, it is characterised in that：Step
Rapid S3 also includes step in detail below：
Step S31：It is inverse according to the virtual value E of the voltage of full-bridge type AC-DC rectification circuit input ends and tested grid-connected photovoltaic
Become the active-power P of device outputpWith reactive power Pq, calculating simulation resistance value R：R=E2/PpIf, reactive power PqJust, to count
Calculate idle inductance value Lq：Lq=E2/ωPp, it is otherwise Lq=0, if reactive power PqIt is negative, calculates idle capacitance Cq：Cq=
Pp/ωE2, it is otherwise Cq=0；
Step S32:According to electric voltage frequency ω, the setting value Q of quality factor, artifical resistance value R and the idle inductance value during test
Lq, calculating simulation inductance value L：L=Lq+R/ωQ；
Step S33：According to the virtual value E of the voltage of full-bridge type AC-DC rectification circuit input ends, tested grid-connected photovoltaic inversion
The active-power P of device outputp, quality factor setting value Q and test when electric voltage frequency ω, if PqFor just, calculating simulation is electric
Capacitance C：C=Q/ ω R-Pp/ωE2+Cq；
Step S34：Artifical resistance value R, inductance value L, capacitance C and the full-bridge type AC-DC rectification circuits obtained according to calculating
The voltage e of input, sets up the equation equation of Parallel RLC Circuit：iR=e2/ R, e=LdiL/ dt, iC=Cde/dt；
Step S35：Equation equation in discretization step S34, obtains iR_n+1=en 2/ R, iL_n+1=2 π en/NωL+iL_n, iC_n+1
=N ω C (en-en-1N is the sampling number of each cycle of the voltage of full-bridge type AC-DC rectification circuit input ends in the π of)/2, formula；
Step S36：Choose the reference value of the input current of full-bridge type AC-DC rectification circuit input ends：icov_ref=iR_n+1+iL_n+1
+iC_n+1；
Step S37：Input current controlling unit adoption rate resonance and the Voltage Feedback compensation of full-bridge type AC-DC rectification circuits,
Realize to icov_refAccurate tracking, the part throttle characteristics of accurate simulation parallel connection RLC constant impedance loads；
Step S38：Stable full-bridge type DC-AC inverter circuit DC voltages, control the output current of feedback end, by grid-connected photovoltaic
The active power of inverter output is fed back to power distribution network with unity power factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242085.9A CN104808093B (en) | 2015-05-13 | 2015-05-13 | Anti- isolated island protection test circuit and method based on constant impedance load simulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242085.9A CN104808093B (en) | 2015-05-13 | 2015-05-13 | Anti- isolated island protection test circuit and method based on constant impedance load simulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104808093A CN104808093A (en) | 2015-07-29 |
| CN104808093B true CN104808093B (en) | 2017-10-20 |
Family
ID=53693091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510242085.9A Active CN104808093B (en) | 2015-05-13 | 2015-05-13 | Anti- isolated island protection test circuit and method based on constant impedance load simulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104808093B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116254A (en) * | 2015-08-26 | 2015-12-02 | 国家电网公司 | Parasitic parameter compensation algorithm for anti-islanding detection system |
| CN106918737A (en) * | 2015-12-28 | 2017-07-04 | 华为技术有限公司 | A kind of method and reactive power detection device for detecting power network dynamic reactive power |
| CN107831394A (en) * | 2017-12-06 | 2018-03-23 | 国网山西省电力公司临汾供电公司 | Test system and its method of testing based on the anti-isolated island protection of current transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852663A (en) * | 2013-08-06 | 2014-06-11 | 国家电网公司 | Energy feedback type distributed photovoltaic power inverter integrated test system |
| CN104237700A (en) * | 2014-09-29 | 2014-12-24 | 国家电网公司 | Microgrid semi-physical testing circuit and method on basis of feedback type load simulator |
| CN104242328A (en) * | 2014-09-03 | 2014-12-24 | 南方电网科学研究院有限责任公司 | Energy storage control method based on impedance detection |
| CN104330979A (en) * | 2014-10-31 | 2015-02-04 | 国家电网公司 | Analog simulation system of complex power distribution network |
| CN204613329U (en) * | 2015-05-13 | 2015-09-02 | 国家电网公司 | Based on the anti-island protect test circuit of constant impedance load simulation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4140837B2 (en) * | 2003-10-31 | 2008-08-27 | 独立行政法人科学技術振興機構 | Test equipment for actual equipment connected to the power distribution system |
-
2015
- 2015-05-13 CN CN201510242085.9A patent/CN104808093B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852663A (en) * | 2013-08-06 | 2014-06-11 | 国家电网公司 | Energy feedback type distributed photovoltaic power inverter integrated test system |
| CN104242328A (en) * | 2014-09-03 | 2014-12-24 | 南方电网科学研究院有限责任公司 | Energy storage control method based on impedance detection |
| CN104237700A (en) * | 2014-09-29 | 2014-12-24 | 国家电网公司 | Microgrid semi-physical testing circuit and method on basis of feedback type load simulator |
| CN104330979A (en) * | 2014-10-31 | 2015-02-04 | 国家电网公司 | Analog simulation system of complex power distribution network |
| CN204613329U (en) * | 2015-05-13 | 2015-09-02 | 国家电网公司 | Based on the anti-island protect test circuit of constant impedance load simulation |
Non-Patent Citations (1)
| Title |
|---|
| RLC负荷模型分布式发电孤岛检测方法;贺眉眉等;《电力系统保护与控制》;20110316;第39卷(第6期);第7-11页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104808093A (en) | 2015-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ghorbani et al. | Impact of SVC on the protection of transmission lines | |
| Choi et al. | A series compensator with fault current limiting function | |
| CN106655144A (en) | Dual-closed-loop control-based active voltage arc extinction method and apparatus for power distribution network in fault | |
| CN103852663A (en) | Energy feedback type distributed photovoltaic power inverter integrated test system | |
| Khederzadeh et al. | STATCOM modeling impacts on performance evaluation of distance protection of transmission lines | |
| CN104808093B (en) | Anti- isolated island protection test circuit and method based on constant impedance load simulation | |
| CN207625296U (en) | A kind of active and passive combination power load three-phase imbalance regulating device | |
| CN105720594B (en) | The compensation method of pure active three-phase unbalance load compensation capacity | |
| CN107769230A (en) | A kind of active and passive combination power load three-phase imbalance adjusting means | |
| CN103117554A (en) | Intelligent RLC (resistance inductance capacitance) load and island-preventing detecting circuit | |
| CN110474342B (en) | Method for constructing power distribution network voltage sag disturbance treatment effect evaluation model | |
| CN103368167A (en) | Single-phase earth fault fundamental current full compensation device and method | |
| CN107104420A (en) | The segment protection method of circuit distance I accessed suitable for THE UPFC | |
| CN113872146A (en) | Neutral point hybrid ground fault regulation and control device and method | |
| CN102435881A (en) | Test circuit of dynamic reactive power compensation and harmonic control device and test method thereof | |
| CN109256762A (en) | Power distribution network single-phase fault current compensation control method, device and system | |
| CN110518596A (en) | Distribution voltage Dynamic control method containing electric arc furnaces | |
| CN107785883A (en) | A kind of more level active compensation devices of three-phase four-arm and control method | |
| CN109361324A (en) | A kind of three phase inverter parallel power equalization methods based on zero-sequence component | |
| CN104198953B (en) | Two-way operational testing system and method for electric automobile charge-discharge device | |
| Chinmay et al. | Optimum design of dynamic voltage restorer for voltage sag mitigation in distribution network | |
| CN202230156U (en) | Testing loop of dynamic reactive compensation and harmonic wave treating device | |
| CN107785882A (en) | A kind of more level active compensation devices of three-phase four-arm and control method | |
| CN204613329U (en) | Based on the anti-island protect test circuit of constant impedance load simulation | |
| Dhulshette et al. | Validation of STATCOM capabilities through modelling and simulation on simulink platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170503 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: State Grid Fujian Electric Power Co., Ltd. Applicant after: Electric Power Research Institute, State Grid Fujian Electric Power Co., Ltd. Applicant after: Fujian EPRI Power Commissioning Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: State Grid Fujian Electric Power Co., Ltd. Applicant before: Electric Power Research Institute, State Grid Fujian Electric Power Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |