CN111262232A - Distribution network grounding state safety identification and working condition control method - Google Patents
Distribution network grounding state safety identification and working condition control method Download PDFInfo
- Publication number
- CN111262232A CN111262232A CN202010147632.6A CN202010147632A CN111262232A CN 111262232 A CN111262232 A CN 111262232A CN 202010147632 A CN202010147632 A CN 202010147632A CN 111262232 A CN111262232 A CN 111262232A
- Authority
- CN
- China
- Prior art keywords
- state
- working condition
- input device
- distribution network
- grounding
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a distribution network grounding state safety identification and working condition control method which comprises a simulation test network, an arc extinction voltage limiting grounding compensation device and a distribution network grounding fault device, wherein the distribution network grounding fault device is a judgment model which adopts input working parameter fault types to judge, fuses are connected beside an insulator in parallel, an arc of a grounding short circuit is generated through a control switch, and the fault type generated by a line with a fault is output through the judgment model. The distribution network grounding state safety identification and working condition control method has the advantages that the hidden fault can be completely detected and identified, and therefore the working condition can be effectively controlled.
Description
Technical Field
The invention relates to the technical field of distribution network grounding states, in particular to a method for safely identifying the grounding state of a distribution network and controlling working conditions.
Background
With the development of economy, the power supply can not meet the requirements of people, the safety problem of a power grid becomes more and more serious, and based on the development and expansion of the construction of a medium-voltage power distribution network, the main task of the economic development of the current power grid is to develop and expand the construction of the medium-voltage power distribution network, the medium-voltage and low-voltage power distribution network in China is mainly overhead lines, the structures of the lines are complex, the branches are numerous, faults are easy to occur, statistics shows that the power failure accidents caused by the faults of the power distribution network account for more than 95 percent of the total power failure accidents in the operation process of a power system, wherein 70 percent of the accidents are.
However, the traditional power grid safety identification and working condition control mode has low maintenance efficiency on the power grid, maintenance faults cannot be thoroughly eliminated, hidden faults cannot be identified, and further the control strength on the working conditions is reduced.
Disclosure of Invention
The invention aims to provide a distribution network grounding state safety identification and working condition control method which has the advantages of being capable of detecting and identifying fault hidden dangers to the greatest extent, and therefore effectively controlling working conditions, and solves the problems that the traditional power grid safety identification and working condition control mode is low in maintenance efficiency of a power grid, maintenance faults cannot be thoroughly eliminated, hidden faults cannot be identified, and further control strength of the working conditions is reduced.
In order to achieve the purpose, the invention provides the following technical scheme: a distribution network grounding state safety identification and working condition control method comprises a simulation test network, an arc extinction voltage limiting grounding compensation device and a distribution network grounding fault device, wherein the distribution network grounding fault device is a judgment model which adopts input working parameter fault types for judgment, a fuse is connected beside an insulator in parallel, an arc with a grounding short circuit is generated through a control switch, the fault type generated by a circuit with a fault is output through the judgment model, the arc extinction voltage limiting grounding compensation device is used for tuning a power grid, an inductor of an arc extinction coil is changed through the change of the capacitance of the power grid, so that the compensation degree is completed, when the distribution network generates single-phase grounding, the reactance of a tap of the arc coil is known, a fault line is selected through the change of the capacitance of the tap, a special signal which exists in the fault line in short time is detected, and the front tap, the fault line and the tap of the distribution, The voltage of the rear neutral point, so as to inquire the fault generating point according to the condition of the fault indicator arranged on the main line and the branch line thereof;
the profile control steps are as follows: a. the method comprises the steps of correcting a real-time working condition of a distribution network grounding state into one of stable working conditions of the distribution network grounding state to obtain a real-time stable working condition, dividing working condition states of a power input device and a power output device in the distribution network grounding state into eight stable working conditions which are respectively a stop state, a starting state, an idling state, a dragging state, a small-load power generation state, an economic working condition power generation state, a rated working condition power generation state and a limit working condition power generation state, wherein different stable working conditions respectively correspond to the rotating speeds of the power input device in different distribution network grounding states and the output power of the power input device in the distribution network grounding state;
b. the overall power requirement of the grounding state of the distribution network corresponds to one of stable working conditions of the grounding state of the distribution network, and a stable target working condition is obtained;
c. comparing the real-time stable working condition with the stable target working condition, if the real-time stable working condition and the stable target working condition are the same, ending the whole control flow, otherwise, entering the step d; and d, finishing the whole control process after controlling the real-time stable working condition to be converted into the stable target working condition, wherein the step d comprises the following steps:
d1, determining a conversion mode from a real-time stable working condition to a stable target working condition, and then obtaining a working condition conversion sequence number;
d2, assigning the working condition conversion serial number to a real-time stable working condition;
d3, controlling the real-time stable working condition to switch to the stable target working condition by using the working condition switching sequence number.
Preferably, different insulators and different insulator surface working conditions are adopted for the distribution network ground fault device 3, the grounding is caused through a fuse to generate a grounding short circuit arc, and arc extinction critical values under different insulation working conditions of the distribution network and the neutral point displacement voltage of the distribution network when the grounding arc is extinguished are obtained through a simulation test.
Preferably, the ground current of the distribution network ground fault device 3 is adjusted by changing the output mode of the compensation current of the arc extinction voltage limiting ground compensation device 2, the duration time of the ground short circuit arc is measured, and the corresponding relation between the ground current and the arc extinction time under the specific different ground short circuit point insulation working conditions is obtained by a simulation test method, so that the relation between residual current control and dynamic conversion time in the complete set is obtained.
Preferably, the conversion mode from the real-time stable working condition to the stable target working condition is a fuzzy mode, the conversion path of the power output device in the distribution network grounding state in the fuzzy mode is converted from the real-time stable working condition to the stable target working condition, and the conversion path of the power input device in the distribution network grounding state in the fuzzy mode is converted from the real-time stable working condition to the stable target working condition: the conversion mode from the real-time stable working condition to the stable target working condition is a continuous mode, and the following transition states are provided in the working condition conversion of the power input device in the distribution network grounding state:
a first transition state of a power input device is arranged between the stop state and the start state, a second transition state of the power input device is arranged between the start state and the idle state, a third transition state of the power input device is arranged between the idle state and the dragging state, a fourth transition state of the power input device is arranged between the dragging state and the small-load power generation state, a fifth transition state of the power input device is arranged between the small-load power generation state and the economic working condition power generation state, a sixth transition state of the power input device is arranged between the economic working condition power generation state and the rated working condition power generation state, a seventh transition state of the power input device is arranged between the rated working condition power generation state and the limit working condition power generation state, an eighth transition state of the power input device is arranged between the start state and the dragging state, and a ninth transition state of the power input device is arranged between the stop, a tenth transition state of the power input device is arranged between the idle state and the small-load power generation state, the rotating speed of the power input device in the transition states continuously changes, and a conversion path of the power input device in the distribution network grounding state is converted from a real-time stable working condition to a stable target working condition:
the power input device in the distribution network grounding state has the following transition states in the working condition conversion:
a first transition state of the power input device is arranged between the stop state and the start state, a second transition state of the power input device is arranged between the start state and the idle state, a third transition state of the power input device is arranged between the idle state and the dragging state, a fourth transition state of the power input device is arranged between the dragging state and the small-load power generation state, a fifth transition state of the power input device is arranged between the small-load power generation state and the economic working condition power generation state, a sixth transition state of the power input device is arranged between the economic working condition power generation state and the rated working condition power generation state, a seventh transition state of the power input device is arranged between the rated working condition power generation state and the limit working condition power generation state, an eighth transition state of the power input device is arranged between the start state and the dragging state, and a ninth transition state of the power input device is arranged between, and a tenth transition state of the power input device is arranged between the idle state and the small-load power generation state, the output power of the motor in the transition states is continuously changed, and the power input device in the distribution network grounding state is used for converting a path from a real-time stable working condition to a stable target working condition.
Compared with the prior art, the invention has the following beneficial effects:
the distribution network grounding state safety identification and working condition control method has the advantages that hidden faults can be detected and identified to the greatest extent, working conditions can be effectively controlled, and the problems that the traditional power grid safety identification and working condition control mode is low in maintenance efficiency of a power grid, the maintenance faults cannot be thoroughly eliminated, the hidden faults cannot be identified, and further the control strength of the working conditions is reduced are solved.
Drawings
Fig. 1 is a distribution diagram of a power distribution experimental network, an arc extinction voltage limiting grounding compensation device and a distribution network grounding fault device of the structure of the invention.
In the figure: 1. simulating a test net; 2. an arc extinction voltage limiting grounding compensation device; 3. distribution network ground fault device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the invention provides a technical solution, a distribution network grounding state safety identification and working condition control method, comprising a simulation test network 1, an arc extinction voltage-limiting grounding compensation device 2, and a distribution network grounding fault device 3, wherein the distribution network grounding fault device 3 is a judgment model for judging the fault type of an input working parameter, an arc with a grounding short circuit is generated by connecting a fuse in parallel to an insulator through a control switch, the fault type generated by a line with a fault is output through the judgment model, the arc extinction voltage-limiting grounding compensation device 2 is used for tuning a power grid, an inductor of an arc extinction coil is changed through the change of the capacitance of the power grid, so as to complete the compensation degree, when the distribution network has a single-phase grounding, the reactance of a tap of the arc coil is known, a fault line is selected by changing the capacitance of the tap, and then detecting a special signal which exists in the fault line when the short time, and measuring the voltage of the front and rear neutral points of the tap, thereby inquiring the fault generation point according to the condition of the fault indicator installed on the trunk line and the branch line thereof;
the profile control steps are as follows: a. the method comprises the steps of correcting a real-time working condition of a distribution network grounding state into one of stable working conditions of the distribution network grounding state to obtain a real-time stable working condition, dividing working conditions of a power input device and a power output device in the distribution network grounding state into eight stable working conditions which are respectively a stop state, a start state, an idle state, a dragging state, a small-load power generation state, an economic working condition power generation state, a rated working condition power generation state and a limit working condition power generation state, wherein different stable working conditions respectively correspond to the rotating speed of the power input device in different distribution network grounding states and the output power of the power input device in the distribution network grounding state;
b. the overall power requirement of the grounding state of the distribution network corresponds to one of stable working conditions of the grounding state of the distribution network, and a stable target working condition is obtained;
c. comparing the real-time stable working condition with the stable target working condition, if the real-time stable working condition and the stable target working condition are the same, ending the whole control flow, otherwise, entering the step d; and d, finishing the whole control process after controlling the real-time stable working condition to be converted into the stable target working condition, wherein the step d comprises the following steps:
d1, determining a conversion mode from a real-time stable working condition to a stable target working condition, and then obtaining a working condition conversion sequence number;
d2, assigning the working condition conversion serial number to a real-time stable working condition;
d3, according to the working condition conversion sequence number, controlling the real-time stable working condition to convert to the stable target working condition, adopting different insulators and different insulator surface working conditions for the distribution network ground fault device 3, generating ground short circuit arc by grounding caused by fuse, obtaining the extinction critical value under different insulation working conditions of the distribution network and the neutral point displacement voltage of the distribution network when the ground arc is extinguished by using a simulation test, adjusting the ground current of the distribution network ground fault device 3 by changing the output mode of the compensation current of the arc extinction voltage limiting ground compensation device 2, measuring the duration time of the ground short circuit arc, obtaining the corresponding relation between the ground current and the extinction time under the specific different insulation working conditions of the ground short circuit point by using the simulation test method, thereby obtaining the relation between the residual current control and the dynamic conversion time in the complete set, wherein the conversion mode from the real-time stable working condition to the stable target working condition is a fuzzy mode, the power output device conversion path of the distribution network grounding state in the fuzzy mode is converted from a real-time stable working condition to a stable target working condition, and the power input device conversion path of the distribution network grounding state in the fuzzy mode is converted from the real-time stable working condition to the stable target working condition: the conversion mode from the real-time stable working condition to the stable target working condition is a continuous mode, and the following transition states are provided in the working condition conversion of the power input device in the distribution network grounding state:
a first transition state of the power input device is arranged between the stop state and the start state, a second transition state of the power input device is arranged between the start state and the idle state, a third transition state of the power input device is arranged between the idle state and the dragging state, a fourth transition state of the power input device is arranged between the dragging state and the small-load power generation state, a fifth transition state of the power input device is arranged between the small-load power generation state and the economic working condition power generation state, a sixth transition state of the power input device is arranged between the economic working condition power generation state and the rated working condition power generation state, a seventh transition state of the power input device is arranged between the rated working condition power generation state and the limit working condition power generation state, an eighth transition state of the power input device is arranged between the start state and the dragging state, and a ninth transition state of the power input device is arranged between, a tenth transition state of the power input device is arranged between the idle state and the small-load power generation state, the rotating speed of the power input device in the transition states continuously changes, and a conversion path of the power input device in the distribution network grounding state is converted from a real-time stable working condition to a stable target working condition:
the power input device in the distribution network grounding state has the following transition states in the working condition conversion:
a first transition state of the power input device is arranged between the stop state and the start state, a second transition state of the power input device is arranged between the start state and the idle state, a third transition state of the power input device is arranged between the idle state and the dragging state, a fourth transition state of the power input device is arranged between the dragging state and the small-load power generation state, a fifth transition state of the power input device is arranged between the small-load power generation state and the economic working condition power generation state, a sixth transition state of the power input device is arranged between the economic working condition power generation state and the rated working condition power generation state, a seventh transition state of the power input device is arranged between the rated working condition power generation state and the limit working condition power generation state, an eighth transition state of the power input device is arranged between the start state and the dragging state, and a ninth transition state of the power input device is arranged between, and a tenth transition state of the power input device is arranged between the idle state and the small-load power generation state, the output power of the motor in the transition states is continuously changed, and the power input device in the distribution network grounding state is used for converting a path from a real-time stable working condition to a stable target working condition.
In summary, the following steps: the distribution network grounding state safety identification and working condition control method has the advantages that hidden faults can be thoroughly identified and eliminated, and further the control strength to working conditions is improved through the cooperation of the simulation test network 1, the arc extinction voltage limiting grounding compensation device 2 and the distribution network grounding fault device 3, compared with the traditional power grid safety identification and working condition control maintenance mode, the maintenance efficiency is improved, and the hidden faults can be thoroughly identified and eliminated.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A distribution network grounding state safety identification and working condition control method comprises a simulation test network (1), an arc extinction voltage limiting grounding compensation device (2) and a distribution network grounding fault device (3), and is characterized in that: the distribution network ground fault device (3) is a judgment model which adopts the input working parameter fault category to judge, the fuse is connected in parallel beside the insulator, the arc of the grounding short circuit is generated by controlling the switch, and the fault category generated by the line with fault is output through a judgment model, the arc extinction voltage limiting grounding compensation device (2) is used for tuning the power grid, and through the change of the power grid capacitance, thereby changing the inductor of the arc suppression coil, thereby completing the compensation degree, when the distribution network is earthed in a single phase, the reactance of a tap of the arc suppression coil is known, by changing the capacitance of the tap, selecting the fault line by detecting a special signal existing in the fault line for a short time, and measuring the voltages of the front and rear neutral points of the tap, so as to inquire the fault generating point according to the condition of the fault indicator arranged on the main line and the branch line;
the profile control steps are as follows: a. the method comprises the steps of correcting a real-time working condition of a distribution network grounding state into one of stable working conditions of the distribution network grounding state to obtain a real-time stable working condition, dividing working condition states of a power input device and a power output device in the distribution network grounding state into eight stable working conditions which are respectively a stop state, a starting state, an idling state, a dragging state, a small-load power generation state, an economic working condition power generation state, a rated working condition power generation state and a limit working condition power generation state, wherein different stable working conditions respectively correspond to the rotating speeds of the power input device in different distribution network grounding states and the output power of the power input device in the distribution network grounding state;
b. the overall power requirement of the grounding state of the distribution network corresponds to one of stable working conditions of the grounding state of the distribution network, and a stable target working condition is obtained;
c. comparing the real-time stable working condition with the stable target working condition, if the real-time stable working condition and the stable target working condition are the same, ending the whole control flow, otherwise, entering the step d; and d, finishing the whole control process after controlling the real-time stable working condition to be converted into the stable target working condition, wherein the step d comprises the following steps:
d1, determining a conversion mode from a real-time stable working condition to a stable target working condition, and then obtaining a working condition conversion sequence number;
d2, assigning the working condition conversion serial number to a real-time stable working condition;
d3, controlling the real-time stable working condition to switch to the stable target working condition by using the working condition switching sequence number.
2. The distribution network grounding state safety identification and working condition control method according to claim 1, characterized in that: different insulators and different insulator surface working conditions are adopted for the distribution network ground fault device (3), grounding is caused through a fuse to generate grounding short circuit electric arcs, and arc extinction critical values under different insulation working conditions of the distribution network and distribution network neutral point displacement voltage when the grounding electric arcs are extinguished are obtained through a simulation test.
3. The distribution network grounding state safety identification and working condition control method according to claim 1, characterized in that: the method comprises the steps of adjusting the grounding current of a distribution network grounding fault device (3) by changing the output mode of the compensation current of an arc extinction voltage-limiting grounding compensation device (2), measuring the duration time of a grounding short circuit arc, and obtaining the corresponding relation between the grounding current and the arc extinction time under specific different grounding short circuit point insulation working conditions by a simulation test method, thereby obtaining the relation between residual current control and dynamic conversion time in the complete set.
4. The distribution network grounding state safety identification and working condition control method according to claim 1, characterized in that: wherein the conversion mode from the real-time stable working condition to the stable target working condition is a fuzzy mode, the electric power output device conversion path of the distribution network grounding state in the fuzzy mode is converted from the real-time stable working condition to the stable target working condition, and the conversion path of the electric power input device of the distribution network grounding state in the fuzzy mode is converted from the real-time stable working condition to the stable target working condition: the conversion mode from the real-time stable working condition to the stable target working condition is a continuous mode, and the following transition states are provided in the working condition conversion of the power input device in the distribution network grounding state:
a first transition state of a power input device is arranged between the stop state and the start state, a second transition state of the power input device is arranged between the start state and the idle state, a third transition state of the power input device is arranged between the idle state and the dragging state, a fourth transition state of the power input device is arranged between the dragging state and the small-load power generation state, a fifth transition state of the power input device is arranged between the small-load power generation state and the economic working condition power generation state, a sixth transition state of the power input device is arranged between the economic working condition power generation state and the rated working condition power generation state, a seventh transition state of the power input device is arranged between the rated working condition power generation state and the limit working condition power generation state, an eighth transition state of the power input device is arranged between the start state and the dragging state, and a ninth transition state of the power input device is arranged between the stop, a tenth transition state of the power input device is arranged between the idle state and the small-load power generation state, the rotating speed of the power input device in the transition states continuously changes, and a conversion path of the power input device in the distribution network grounding state is converted from a real-time stable working condition to a stable target working condition:
the power input device in the distribution network grounding state has the following transition states in the working condition conversion:
a first transition state of the power input device is arranged between the stop state and the start state, a second transition state of the power input device is arranged between the start state and the idle state, a third transition state of the power input device is arranged between the idle state and the dragging state, a fourth transition state of the power input device is arranged between the dragging state and the small-load power generation state, a fifth transition state of the power input device is arranged between the small-load power generation state and the economic working condition power generation state, a sixth transition state of the power input device is arranged between the economic working condition power generation state and the rated working condition power generation state, a seventh transition state of the power input device is arranged between the rated working condition power generation state and the limit working condition power generation state, an eighth transition state of the power input device is arranged between the start state and the dragging state, and a ninth transition state of the power input device is arranged between, and a tenth transition state of the power input device is arranged between the idle state and the small-load power generation state, the output power of the motor in the transition states is continuously changed, and the power input device in the distribution network grounding state is used for converting a path from a real-time stable working condition to a stable target working condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010147632.6A CN111262232A (en) | 2020-03-05 | 2020-03-05 | Distribution network grounding state safety identification and working condition control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010147632.6A CN111262232A (en) | 2020-03-05 | 2020-03-05 | Distribution network grounding state safety identification and working condition control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111262232A true CN111262232A (en) | 2020-06-09 |
Family
ID=70954736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010147632.6A Pending CN111262232A (en) | 2020-03-05 | 2020-03-05 | Distribution network grounding state safety identification and working condition control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111262232A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1591033A (en) * | 2003-08-26 | 2005-03-09 | 陈昌鹏 | Method for small current grounding selecting wire and fault positioning |
| CN103101446A (en) * | 2011-11-10 | 2013-05-15 | 长春易控汽车电子有限公司 | Working condition control method for range extender |
| CN103500992A (en) * | 2013-09-11 | 2014-01-08 | 广西电网公司电力科学研究院 | Method for tuning arc suppression coil of power distribution network |
| CN103592536A (en) * | 2013-10-30 | 2014-02-19 | 李景禄 | Laboratory simulation test method of control parameters of dynamical earthing method for power distribution network neutral point |
| CN108321779A (en) * | 2018-03-12 | 2018-07-24 | 李景禄 | A kind of earth fault Intelligent treatment method of Modes for Neutral |
-
2020
- 2020-03-05 CN CN202010147632.6A patent/CN111262232A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1591033A (en) * | 2003-08-26 | 2005-03-09 | 陈昌鹏 | Method for small current grounding selecting wire and fault positioning |
| CN103101446A (en) * | 2011-11-10 | 2013-05-15 | 长春易控汽车电子有限公司 | Working condition control method for range extender |
| CN103500992A (en) * | 2013-09-11 | 2014-01-08 | 广西电网公司电力科学研究院 | Method for tuning arc suppression coil of power distribution network |
| CN103592536A (en) * | 2013-10-30 | 2014-02-19 | 李景禄 | Laboratory simulation test method of control parameters of dynamical earthing method for power distribution network neutral point |
| CN108321779A (en) * | 2018-03-12 | 2018-07-24 | 李景禄 | A kind of earth fault Intelligent treatment method of Modes for Neutral |
Non-Patent Citations (1)
| Title |
|---|
| 李政洋等: "基于故障性质判断法的配电网中性点动态接地成套装置的开发及应用", 《电瓷避雷器》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Freitas et al. | Comparative analysis between ROCOF and vector surge relays for distributed generation applications | |
| EP2346132B1 (en) | Fast three-phase reclosing method in shunt reactor compensated transmission lines | |
| CN111707904A (en) | Distribution network physical simulation experiment system with arc light grounding variable structure | |
| Morton et al. | AC or DC? Economics of grid connection design for offshore wind farms | |
| CN105576621A (en) | Arc light protection method | |
| Agüero et al. | Improving the reliability of power distribution systems through single-phase tripping | |
| Sahu et al. | Photovoltaic hosting capacity increment in an unbalanced active distribution network | |
| CN108241105A (en) | A kind of test method of the arc grounding line selection apparatus based on RTDS | |
| CN111262232A (en) | Distribution network grounding state safety identification and working condition control method | |
| Zhu et al. | A three-phase adaptive reclosure technology for distribution feeders based on parameter identification | |
| CN105406465A (en) | Load torque margin based zone area state analysis method of power distribution network | |
| CN114759530A (en) | Small resistance grounding system fault differential protection method, system, medium and equipment | |
| CN107359633A (en) | Switching device is automatically selected based on monolithic processor controlled load | |
| CN101604838B (en) | Method for optionally cutting off fault point of double branch circuits at low voltage side of transformer | |
| Ma et al. | System studies of voltage dips resulting from energisation of MV wind turbine transformers | |
| Yuan et al. | Small-disturbance line selection method applied to turn-adjusting arc suppression coil | |
| CN112198455B (en) | Calculation method for small reactance model selection of autotransformer neutral point | |
| CN219247471U (en) | Join in marriage quick protection switch of network overhead line disconnection trouble | |
| Mattavelli et al. | Generators and loads models to investigate uncontrolled islanding on active distribution networks | |
| CN116047355B (en) | Grounding transformer operation condition on-line detection method based on high-voltage side current signal | |
| Ren et al. | Influence of line current limiting reactor on temporary overvoltage of 500 kV transmission line | |
| Reihani et al. | Adaptive protection of distribution grids with distributed generation | |
| Wang et al. | Electric Design of 35kV Substation | |
| CN205489563U (en) | Generator export distribution structure | |
| Eroshenko et al. | Practical experience in short-circuit current limiting measures implementation |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200609 |
|
| RJ01 | Rejection of invention patent application after publication |