CN114123131A - Function optimization's fast system of cutting - Google Patents
Function optimization's fast system of cutting Download PDFInfo
- Publication number
- CN114123131A CN114123131A CN202111420560.9A CN202111420560A CN114123131A CN 114123131 A CN114123131 A CN 114123131A CN 202111420560 A CN202111420560 A CN 202111420560A CN 114123131 A CN114123131 A CN 114123131A
- Authority
- CN
- China
- Prior art keywords
- switching
- loop
- power
- quick
- fast
- 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.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 20
- 238000005457 optimization Methods 0.000 title description 4
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000004056 waste incineration Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- 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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- 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
- H02H7/04—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 for transformers
-
- 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
- H02H7/06—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 for dynamo-electric generators; for synchronous capacitors
-
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
Abstract
The invention discloses a function-optimized fast switching system, which solves the problem that a fast switching device cannot identify the condition that the power superposition of a plurality of sets exceeds the capacity of a main transformer to start fast switching logic when an external line fails, and prevents the expansion of an electrical accident caused by the overload of the main transformer, and adopts the technical scheme that: the device comprises a fast cutting device, wherein DEH adjustment intervention, unit power judgment and a fast cutting device test pressing plate loop are added in an open loop of the fast cutting device, two unit power signals are accessed in an electric signal loop, and a shielding flexible wire is adopted for connection of each loop. The invention discloses an intelligent anti-misoperation automatic switching system for a station power supply, which can improve the reliability of a station power system of a waste incineration power plant.
Description
Technical Field
The invention relates to a function-optimized fast switching system, and belongs to the technical field of power supply switching.
Background
The 10kV high-voltage station bus is a main power supply junction of an incineration power generation enterprise and respectively bears the dual attributes of external power transmission and internal power supply and power generation. In order to ensure the reliability of power supply and the rationality of the main wiring structure, a one-to-one arrangement mode, namely single bus segmentation, is generally adopted. Under the normal operation mode, 10kV two-section generating line divides the operation, and two generators carry to the national grid after deducting the station service power through two steps up and change. The power supply quick switching device is arranged in a plant, and the power supply quick switching device is started and recovered after a 10kV station bus loses power due to the fault of an external power grid, an internal main transformer or a single generator under a specific condition, so that the power supply reliability is improved, and the environmental risk is reduced.
The traditional power supply fast switching device is basically configured with two switching types (accident and abnormal) and three starting modes (protection, voltage loss and stealing trip), and when a system is developed for the second time, the protection function of equipment is accessed or the voltage loss criterion is added.
The prior device has the following action modes:
and (3) switching under the condition of bus voltage loss: when the voltage of the 10kV I section is smaller than the 'no-voltage starting amplitude' (60% Un) and the voltage of the 10kV VII section is larger than the 'voltage abnormal amplitude' (80%), starting and switching are carried out through a 'no-voltage starting delay' 3s quick switching device, the low-voltage side of the 1# main transformer is firstly tripped, and when the switch on the low-voltage side of the 1# main transformer is 0, the detection switch-on condition (quick switching, synchronization and residual voltage) is met, the section switch is switched on and off.
The switch steals and jumps: when the 1# main transformer low-voltage side switch HWJ =0 and the 1# generator outlet switch HWJ =0, the switch is started to switch in a stealing and jumping mode, the fast switching device detects that the closing condition (fast switching, synchronous and residual voltage) is met, and the section switch is closed.
Protection starting: two upper network cables or two main transformers.
In practical application, the switching logic of the segmented fast switching device has serious defects, namely the segmented fast switching device does not have the load calibration, judgment and load reduction linkage functions, and brings high risk to daily safety production.
Because the system is provided with two generator sets, when the external network fails, the system is connected with a switch to trip, and a single side in the plant forms an isolated network operation state (namely, only one generator and a plurality of electric equipment exist in a small system and the small system is separated from a large power grid to operate), the original design only simply judges the fault and switch state signals, and does not take the load of the generator and the main variable capacity factor in the plant into consideration, so that when the above conditions occur, the main transformer is overloaded and trips to cause the power loss accident of the whole plant.
The device does not have an online logic check mode and a switch simulation check mode, which brings negative effects to the safety of check work after daily logic adjustment.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a fast system of cutting of function optimization, it has solved current fast device of cutting (or fast system of cutting) and can't adjust the parallel unit load and lead to transformer overload in the parallel process, even the whole factory loses the problem of electricity, has improved the fail safe nature of waste incineration factory power consumption system.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a fast switching system with optimized functions comprises a fast switching device, wherein the fast switching device is additionally provided with a DEH adjustment intervention circuit, a unit power judgment circuit and a fast switching device test pressing plate circuit in an open circuit, two unit power signals are accessed in an electric signal circuit, and each circuit is connected by adopting a shielding flexible wire;
the DEH adjustment intervention adopts a normally open contact as a limiting condition for safe switching of the parallel operation of the units in the accident switching, and leads a power control unit in the turbine speed regulation device to the quick switching device;
the unit power judgment is that two unit power meters are accessed into the quick switching device, are subjected to addition operation, are compared with an upper limit and are output to a starting loop to serve as a judgment condition;
the test of the quick-cutting device is that the quick-cutting device is connected into a bypass loop in a pressing plate mode from a positive power supply.
As a preferred example, the unit power judgment is to sum the two unit powers and set a load limit value;
when the sum of the power of the generators in the two units is less than or equal to the load limit value and the protection locking pressing plate is at the position of the outgoing line, the segmented fast switching-on and switching-off loop is switched on, and a switching-on pulse signal is output to the circuit breaker mechanism;
when the sum of the power of the generators in the two sets is larger than the load limit value, the DEH adjustment is conducted to the circuit connection, the DEH adjustment is conducted to the power control module of the speed regulating system through the control circuit of the fast switching device, and difference adjustment is conducted according to the difference between the DEH adjustment and the power control module until balance is achieved.
As a preferred example, the load limit is 20 MW.
As a preferred example, after the main transformer or the external line fault protection is sent out, the quick switching device is started after the quick switching device receives the switching total input, the accident switching and the protection signal, and then the connection point of the generator switching-on position of any unit is judged to be disconnected or the current of the generator outlet is lower than 5% to meet the requirement of one connection point, and then the current can be output.
As a preferred example, when performing verification after logical adjustment of the fast-cutting device, only the test platen of the fast-cutting device needs to be put in.
The invention has the following beneficial effects:
A. the quick switching device is provided with a logic check loop, so that the quick switching device has the advantage of not influencing the normal operation of equipment on the live side, reduces the power failure range and time of the automatic device check, and increases the safety and timeliness of the operation of maintenance personnel.
B. When external line or main transformer trouble, the fast device of cutting combines the characteristics of the operation of current a factory's multiunit under original quick response, the guarantee station service stability, considers the matching nature of whole factory turbo generator total active load and online rate capacity wherein, mutually supports with steam turbine speed governing system power control unit when making the start-up of fast device, and dynamic adjustment reduces the degree of difficulty that the risk that exists and operation personnel accident handled in the original design, improves the reliability in return circuit.
C. When any unit trips before the quick switching device is started, the whole system still acts according to the original design, namely, the line or main transformer protection is started, and after the fault side transformer switch is tripped, a section switch closing instruction is executed after an independent synchronous detection loop.
D. The whole set of device is simple in optimized wiring, DEH control is added in the standby input and output loop of the original loop, but the effect after optimization is remarkable, undisturbed correction can be well achieved, and abnormal tripping frequency of the unit is greatly reduced.
Drawings
FIG. 1 is a logic diagram of a fast switching apparatus according to the present invention;
FIG. 2 is an open view of a quick cutting apparatus according to the present invention;
FIG. 3 is a current loop diagram of a generator power meter according to the present invention;
fig. 4 is a voltage loop diagram of a generator power meter according to the invention.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings.
As shown in fig. 1-4, a function-optimized fast-switching system includes a fast-switching device, which adds DEH adjustment intervention, unit power judgment, and a fast-switching device test pressing plate loop in an open loop, and two unit power signals are accessed in an electrical signal loop, and each loop is connected by a shielding flexible wire;
the DEH adjustment intervention adopts a normally open contact as a limiting condition for safe switching of the parallel operation of the units in the accident switching, and leads a power control unit in the turbine speed regulation device to the quick switching device;
the unit power judgment is that the two unit power meters are accessed into the device, are subjected to addition operation, are compared with an upper limit and are output to a starting loop to serve as a judgment condition;
the quick-cut device test is that a positive power supply is led out and connected into a device in a pressing plate mode to form a bypass loop.
The power of the machine set is judged to sum the power of the two machine sets, a load limit value is set, when the sum of the power of the generators in the two machine sets is less than or equal to the load limit value and the protection locking pressing plate is at the position of leaving the system, the segmented fast switching-on and switching-off loop is switched on, and a switching-on pulse signal is output to the switching mechanism; when the sum of the generator powers in the two sets is larger than the load limit value, DEH adjustment intervenes, the DEH adjustment is that a control loop of the fast switching device is communicated with a power control module of the speed regulating system, dynamic adjustment is carried out according to the load limit value, and after the segmented fast switching is successful, the DEH adjustment intervenes all the time to prevent the overload of the main transformer.
The load limit is 20MW, and the limit can be set according to the system condition.
Three pairs of contacts are added in a circuit of the quick-cutting device, and are connected through a shielding flexible wire, namely a DEH adjustment intervention circuit, a unit power judgment circuit and a quick-cutting device test pressing plate circuit. The DEH adjustment intervention is to introduce a power control unit in a steam turbine speed regulation device to a fast switching device, the set power judgment is to perform addition operation on two set power meters after the two set power meters are accessed to the devices, and then the set power judgment is output to a starting loop as a judgment condition after being compared with an upper limit; the snap-off device test was run from a 101 positive power supply into the device via 814 terminals in the form of a press plate.
When the main transformer or the external line fault protection is sent out, the quick switching device receives all switching total input, accident switching and protection signals and is started, the quick switching device can be output after judging that the contact of any generator switching-on position is disconnected or the current of the generator outlet is lower than 5% and meets the requirement of one of the switching-on position and the switching-off position, unit load judgment is introduced, the starting signal is long pulse at the moment, the power of the 1# generator and the power of the 2# generator are summed, when the value is less than or equal to 20MW and the quick switching protection locking pressing plate is at the switching-off position, the segmented quick switching-on switching-off loop is switched on, and a switching-on pulse signal is output to the switching mechanism. When the power summation value of the 1# generator and the 2# generator is larger than 20MW, DEH adjustment intervenes, namely, a control loop of a fast switching device is connected with a power control module of a speed regulating system, the load upper limit of the generator set is automatically set to 20MW, a turbine regulating valve is adjusted in real time according to load deviation, when the power summation value is smaller than or equal to 20MW, a segmented fast switching-on and switching-off loop is connected, and the action steps are consistent with the steps.
And when the quick switching device does not meet the conditions, the quick switching device enters an abnormal switching working mode, and is output to a bus voltage loss or switch stealing and jumping starting loop after being judged by the bus voltage or switch position state.
When the load control unit of the fast switching system is accessed, an alarm prompt is given in an ECS operation picture to remind operators to pay attention.
The protection locking pressing plate is used as an external hard loop when the device is put on or off, and can be used as a basis for the relay protection checking personnel to carry out work on site.
On the other hand, the device is independently provided with a fast switching logic check circuit, a pressure plate mode is adopted, and the test comprises logic check and single-side equipment action. The positive power supply lead from 101 is led through the platen to the quick-cut device 814 terminal. After the logic of the fast switching device is adjusted, in the first mode, the device can be subjected to accident switching or abnormal switching conditions by adding an analog quantity during the live operation of equipment, the action timeliness and the sequence condition of the device are observed, and the conformity is judged; and in the second mode, when the main wiring is in unilateral outage, the actual action verification of the primary equipment, the outlet loop of the testing device and the action state and time of each switch can be carried out only aiming at the outage loop.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A function optimized fast switching system, comprising a fast switching device, characterized in that: the quick-cutting device is characterized in that DEH adjustment intervention, unit power judgment and a quick-cutting device test pressing plate loop are added in an open loop, two unit power signals are accessed in an electric signal loop, and each loop is connected by adopting a shielding flexible wire;
the DEH adjustment intervention adopts a normally open contact as a limiting condition for safe switching of the parallel operation of the units in the accident switching, and leads a power control unit in the turbine speed regulation device to the quick switching device;
the unit power judgment is that two unit power meters are accessed into the quick switching device, are subjected to addition operation, are compared with an upper limit and are output to a starting loop to serve as a judgment condition;
the test of the quick-cutting device is that the quick-cutting device is connected into a bypass loop in a pressing plate mode from a positive power supply.
2. A function optimized fast switching system as claimed in claim 1, characterized in that: the unit power judgment is to sum the two unit powers and set a load limit value;
when the sum of the power of the generators in the two units is less than or equal to the load limit value and the protection locking pressing plate is at the position of the outgoing line, the segmented fast switching-on and switching-off loop is switched on, and a switching-on pulse signal is output to the circuit breaker mechanism;
when the sum of the power of the generators in the two sets is larger than the load limit value, the DEH adjustment is conducted to the circuit connection, the DEH adjustment is conducted to the power control module of the speed regulating system through the control circuit of the fast switching device, and difference adjustment is conducted according to the difference between the DEH adjustment and the power control module until balance is achieved.
3. A function optimized fast switching system as claimed in claim 2, characterized in that: the load limit is 20 MW.
4. A function optimized fast switching system as claimed in claim 1, characterized in that: when the main transformer or the external line fault protection is sent out, the quick switching device is started after the quick switching device receives the switching total input, the accident switching and the protection signals, and then the connection point of the generator switching-on position of any unit is judged to be disconnected or the current of the generator outlet is lower than 5% to meet the requirement of one of the connection point and the disconnection, and the current can be output.
5. A function optimized fast switching system as claimed in claim 1, characterized in that: when the calibration is implemented after the logic adjustment of the fast switching device, only the test pressing plate of the fast switching device needs to be put into use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111420560.9A CN114123131B (en) | 2021-11-26 | 2021-11-26 | Function optimization's quick cut system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111420560.9A CN114123131B (en) | 2021-11-26 | 2021-11-26 | Function optimization's quick cut system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114123131A true CN114123131A (en) | 2022-03-01 |
| CN114123131B CN114123131B (en) | 2024-03-19 |
Family
ID=80369910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111420560.9A Active CN114123131B (en) | 2021-11-26 | 2021-11-26 | Function optimization's quick cut system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114123131B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8803918A (en) * | 1988-10-31 | 1988-10-31 | ||
| CN201174681Y (en) * | 2008-02-02 | 2008-12-31 | 上海普电节能科技有限公司 | Slip ratio controlling digital intelligent speed regulating device for motor with electric grid fast switching function |
| CN103166241A (en) * | 2011-12-14 | 2013-06-19 | 深圳市康必达中创科技有限公司 | Isolated power grid stability control system |
| CN103501042A (en) * | 2013-10-11 | 2014-01-08 | 国家电网公司 | Isolated grid auxiliary power switching system and method with automatic regulation capacity |
| CN106300442A (en) * | 2016-09-20 | 2017-01-04 | 国网浙江省电力公司电力科学研究院 | A kind of control method of thermal power generation unit responsive electricity grid low frequency fault accommodation |
| CN107465255A (en) * | 2017-08-10 | 2017-12-12 | 西安热工研究院有限公司 | A kind of Turbo-generator Set accident starts auxiliary Power switching method and system |
| US20180159315A1 (en) * | 2015-06-26 | 2018-06-07 | Siemens Aktiengesellschaft | Dc grid |
| DE102017217132B3 (en) * | 2017-09-26 | 2019-01-31 | Bender Gmbh & Co. Kg | Switching power supply with electrical circuitry for input protection circuit |
| CN111463756A (en) * | 2020-05-07 | 2020-07-28 | 华电电力科学研究院有限公司 | Protection locking joint optimization method based on high-service bus protection and fast switching device |
| CN112909903A (en) * | 2021-02-03 | 2021-06-04 | 西安热工研究院有限公司 | High-voltage station grounding protection and fast switching device protection starting combined optimization method |
-
2021
- 2021-11-26 CN CN202111420560.9A patent/CN114123131B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8803918A (en) * | 1988-10-31 | 1988-10-31 | ||
| CN201174681Y (en) * | 2008-02-02 | 2008-12-31 | 上海普电节能科技有限公司 | Slip ratio controlling digital intelligent speed regulating device for motor with electric grid fast switching function |
| CN103166241A (en) * | 2011-12-14 | 2013-06-19 | 深圳市康必达中创科技有限公司 | Isolated power grid stability control system |
| CN103501042A (en) * | 2013-10-11 | 2014-01-08 | 国家电网公司 | Isolated grid auxiliary power switching system and method with automatic regulation capacity |
| US20180159315A1 (en) * | 2015-06-26 | 2018-06-07 | Siemens Aktiengesellschaft | Dc grid |
| CN106300442A (en) * | 2016-09-20 | 2017-01-04 | 国网浙江省电力公司电力科学研究院 | A kind of control method of thermal power generation unit responsive electricity grid low frequency fault accommodation |
| CN107465255A (en) * | 2017-08-10 | 2017-12-12 | 西安热工研究院有限公司 | A kind of Turbo-generator Set accident starts auxiliary Power switching method and system |
| DE102017217132B3 (en) * | 2017-09-26 | 2019-01-31 | Bender Gmbh & Co. Kg | Switching power supply with electrical circuitry for input protection circuit |
| CN111463756A (en) * | 2020-05-07 | 2020-07-28 | 华电电力科学研究院有限公司 | Protection locking joint optimization method based on high-service bus protection and fast switching device |
| CN112909903A (en) * | 2021-02-03 | 2021-06-04 | 西安热工研究院有限公司 | High-voltage station grounding protection and fast switching device protection starting combined optimization method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114123131B (en) | 2024-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109713704B (en) | Communication interruption safety control method, system and medium for power grid side battery energy storage power station | |
| CN203747436U (en) | Distributed photovoltaic power generation access system | |
| CN112366809B (en) | Pilot plant spare power automatic switching device with new forms of energy | |
| CN104242455A (en) | 110 kV substation protection and control action cooperation strategy suitable for DG (distributed generation) accessing | |
| CN107910855B (en) | A kind of connection applied to intelligent substation cuts small power supply device | |
| US20200259332A1 (en) | Load switch for fragile electric power networks | |
| Li et al. | Control and protection system design of zhangbei VSC-HVDC grid | |
| CN114123131A (en) | Function optimization's fast system of cutting | |
| Dong et al. | Analysis and simulation research of cascading faults in ac/dc hybrid grid | |
| CN206922422U (en) | A kind of single line of power plant sends out line fault protection system | |
| CN115249982B (en) | Power grid safety control system for load control of gas turbine generator set | |
| US20230223762A1 (en) | Method, apparatus, and system for monitoring islanding electricity generation unit | |
| CN213125593U (en) | Automatic switch for small hydropower line | |
| CN212676900U (en) | Power plant electric power steady operation system suitable for small-size electric wire netting | |
| CN214900167U (en) | DCS system-based high-connection low-protection system for low-voltage station transformer | |
| Chen et al. | Analysis of the Impact of MW-level Grid-connected Photovoltaic Power Station on Backup Automatic Switch in Distribution Network | |
| Ke et al. | A Method of Distribution Network Protection and Application with Penetration of Renewable Generation | |
| Li et al. | Study on Fault Control Requirement and Strategy of Large Scale Renewable Energy VSC-HVDC Integration | |
| CN218633352U (en) | Isolated network operation system and power generation system for waste heat power generation | |
| Zhang et al. | Configuration, cooperation and existing problems of wind farm relay protection | |
| CN215071660U (en) | Multi-channel power supply system of combined cycle unit | |
| CN210957782U (en) | 35kV transformer substation sectional bus system based on mixed superconducting current limiter | |
| CN209250249U (en) | A kind of automatic back brake system of transformer based on STATCOM | |
| Longo et al. | Adaptive Protection Scheme for AC Microgrids: Simulations for Grid-Connected/Islanded Mode | |
| CN108832653B (en) | Regulating method for non-full-phase operation of camera-transformer set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |