CN115932447A - Grid-connected detection system and method for power distribution network - Google Patents
Grid-connected detection system and method for power distribution network Download PDFInfo
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Abstract
The invention discloses a grid-connected detection system and method for a power distribution network. The grid-connected detection system of the power distribution network comprises: the system comprises a grid connection request information acquisition module, a control module, a power quality detection module and an early warning processing module; the grid connection request information acquisition module is used for acquiring grid connection request information of the distributed power system; the control module is used for reading the electric energy configuration parameters of the distributed power supply system according to the acquired grid connection request information; the electric energy quality detection module is used for detecting whether the electric energy quality of the distributed power supply system is abnormal or not based on the numerical relation between the electric energy configuration parameter of the distributed power supply system and a preset parameter threshold value; the early warning processing module is used for carrying out safety level division on the distributed power system with abnormal power quality and carrying out corresponding early warning processing on the distributed power system according to a safety level division result. The technical scheme of the invention is beneficial to ensuring the grid-connected safety of the power distribution station and the distributed power system.
Description
Technical Field
The embodiment of the invention relates to the technical field of power systems, in particular to a grid-connected detection system and method for a power distribution network.
Background
With the wide application of the digital service of the power distribution network, when the power distribution station is connected with a distributed power supply in a grid, risks such as operation faults, network safety and the like exist. For the risk problem, at present, when the power distribution network is connected to the grid, whether the power distribution network equipment configuration and the distributed power supply equipment configuration meet the requirements of safety and compliance or not is checked manually one by one, or the power distribution network equipment configuration and the distributed power supply equipment configuration are logged on to a single distributed power supply equipment for configuration operation, the operation process is complicated, meanwhile, related potential safety hazards cannot be found in time, and the safe and stable operation of the power distribution network connection is influenced.
Disclosure of Invention
The embodiment of the invention provides a grid-connected detection system and method for a power distribution network, which are beneficial to improving the grid-connected efficiency of a power distribution station and a distributed power system and ensuring the grid-connected safety of the power distribution station and the distributed power system, so that the power supply reliability of the power distribution station is improved, and in addition, the grid-connected detection system and method are beneficial to timely processing the potential safety hazard when the power distribution station and the distributed power system are connected to the grid, so that the grid-connected failure rate is reduced.
In a first aspect, an embodiment of the present invention provides a grid-connected detection system for a power distribution network, where the grid-connected detection system for the power distribution network is configured in a distribution station, and the grid-connected detection system for the power distribution network includes: the system comprises a grid connection request information acquisition module, a control module, a power quality detection module and an early warning processing module;
the grid connection request information acquisition module is used for acquiring grid connection request information of the distributed power system;
the control module is used for reading the electric energy configuration parameters of the distributed power supply system according to the acquired grid connection request information;
the electric energy quality detection module is used for detecting whether the electric energy quality of the distributed power supply system is abnormal or not based on the numerical relation between the electric energy configuration parameter of the distributed power supply system and a preset parameter threshold value;
the early warning processing module is used for carrying out security level division on the distributed power supply system with abnormal power quality and carrying out corresponding early warning processing on the distributed power supply system according to a security level division result.
Optionally, the grid connection request information obtaining module is further configured to: obtaining login information and an operation command of the distributed power system according to the grid connection request information;
the control module is specifically configured to: and controlling the distributed power supply system according to the login information and the operation command so as to read the electric energy configuration parameters of the distributed power supply system.
Optionally, the power configuration parameters include: a current parameter, a voltage parameter, a dynamic thermal stability current parameter, a harmonic parameter, a short circuit capacity parameter and a flicker parameter;
the preset parameter threshold includes: a current safety parameter threshold, a voltage safety parameter threshold, a dynamic thermal stability current safety parameter threshold, a harmonic safety parameter threshold, a short circuit capacity safety parameter threshold and a flicker safety parameter threshold;
the electric energy quality detection module is specifically used for: under the condition that a preset judgment condition is met, judging that the electric energy quality of the distributed power supply system is abnormal, wherein the preset judgment condition comprises the following steps: at least one of the current parameter being above or below the current safety parameter threshold, the voltage parameter being above or below the voltage safety parameter threshold, the thermo-dynamic stability current parameter being above or below the thermo-dynamic stability current safety parameter threshold, the harmonic parameter being above or below the harmonic safety parameter threshold, the short circuit capacity parameter being above or below the short circuit capacity safety parameter threshold, the flicker parameter being above or below the flicker safety parameter threshold.
Optionally, the security level of the distributed power system is divided into a first risk level and a second risk level;
the early warning processing module is specifically used for:
for the distributed power supply system at the first risk level, performing early warning processing on the distributed power supply system according to the preset parameter threshold value to adjust the corresponding electric energy configuration parameter;
for the distributed power system at the second risk level, carrying out early warning treatment for preventing grid connection on the distributed power system;
the first risk level is the distributed power supply system with the electric energy configuration parameter smaller than or equal to the preset multiple of the preset parameter threshold, and the second risk level is the distributed power supply system with the electric energy configuration parameter larger than the preset multiple of the preset parameter threshold.
Optionally, the control module is further configured to:
according to the obtained grid connection request information, updating time limit monitoring is carried out on login information of the distributed power system;
and when the updating time limit of the login information of the distributed power supply system exceeds a set time limit, resetting and reminding the login information of the distributed power supply system.
Optionally, the grid-connected detection system of the power distribution network further includes a disconnection module, where the disconnection module is configured to disconnect the distribution substation from the distributed power supply system.
In a second aspect, an embodiment of the present invention provides a grid-connected detection method for a power distribution network, including:
acquiring grid-connected request information of a distributed power system;
reading the electric energy configuration parameters of the distributed power supply system according to the acquired grid connection request information;
detecting whether the power quality of the distributed power supply system is abnormal or not based on the numerical relation between the power configuration parameters of the distributed power supply system and preset parameter thresholds;
and carrying out security level division on the distributed power supply system with abnormal power quality, and carrying out corresponding early warning processing on the distributed power supply system according to the security level division result.
Optionally, the grid-connected detection method of the power distribution network further includes:
obtaining login information and an operation command of the distributed power system according to the grid connection request information;
the reading of the electric energy configuration parameters of the distributed power supply system according to the acquired grid connection request information comprises the following steps:
and controlling the distributed power supply system according to the login information and the operation command so as to read the electric energy configuration parameters of the distributed power supply system.
Optionally, the power configuration parameters include: current parameters, voltage parameters, dynamic thermal stability current parameters, harmonic parameters, short circuit capacity parameters and flicker parameters;
the preset parameter threshold includes: a current safety parameter threshold, a voltage safety parameter threshold, a dynamic thermal stability current safety parameter threshold, a harmonic safety parameter threshold, a short circuit capacity safety parameter threshold and a flicker safety parameter threshold;
the detecting whether the power quality of the distributed power supply system is abnormal or not based on the numerical relationship between the power configuration parameter of the distributed power supply system and a preset parameter threshold comprises the following steps:
under the condition that a preset judgment condition is met, judging that the electric energy quality of the distributed power supply system is abnormal, wherein the preset judgment condition comprises the following steps: at least one of the current parameter being above or below the current safety parameter threshold, the voltage parameter being above or below the voltage safety parameter threshold, the thermo-kinetic stabilization current parameter being above or below the thermo-kinetic stabilization current safety parameter threshold, the harmonic parameter being above or below the harmonic safety parameter threshold, the short circuit capacity parameter being above or below the short circuit capacity safety parameter threshold, the flicker parameter being above or below the flicker safety parameter threshold.
Optionally, the security level of the distributed power system is divided into a first risk level and a second risk level;
the method for dividing the distributed power system with abnormal power quality into safety levels and performing corresponding early warning processing on the distributed power system according to the safety level division result comprises the following steps:
for the distributed power system at the first risk level, performing early warning processing on the distributed power system according to the preset parameter threshold value to adjust the corresponding electric energy configuration parameter;
for the distributed power system at the second risk level, carrying out early warning treatment for preventing grid connection on the distributed power system;
the first risk level is the distributed power supply system of which the electric energy configuration parameter is smaller than or equal to a preset multiple of the preset parameter threshold, and the second risk level is the distributed power supply system of which the electric energy configuration parameter is larger than the preset multiple of the preset parameter threshold.
The grid-connected detection system and method for the power distribution network provided by the embodiment of the invention are characterized in that the grid-connected detection system for the power distribution network is configured in a power distribution station, and comprises the following steps: the system comprises a grid connection request information acquisition module, a control module, a power quality detection module and an early warning processing module, wherein the grid connection request information acquisition module is used for acquiring grid connection request information of the distributed power system, the control module is used for reading power configuration parameters of the distributed power system according to the acquired grid connection request information, the power quality detection module is used for detecting whether the power quality of the distributed power system is abnormal or not based on the numerical relationship between the power configuration parameters of the distributed power system and preset parameter thresholds, the early warning processing module is used for dividing the safety level of the distributed power system with the abnormal power quality, and corresponding early warning processing is carried out on the distributed power system according to the safety level division result. Compared with the prior art, the technical scheme of the embodiment of the invention is beneficial to improving the grid-connected efficiency of the power distribution station and the distributed power system and ensuring the grid-connected safety of the power distribution station and the distributed power system through the data interaction among the grid-connected request information acquisition module, the control module, the electric energy quality detection module and the early warning processing module in the power distribution station, thereby improving the power supply reliability of the power distribution station, and in addition, the technical scheme of the embodiment of the invention is also beneficial to timely processing the potential safety hazard when the power distribution station and the distributed power system are connected to the grid so as to reduce the grid-connected failure rate.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a grid-connected detection system of a power distribution network according to an embodiment of the present invention;
fig. 2 is a schematic flow diagram of a grid-connected detection method for a power distribution network according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of another grid-connected detection method for a power distribution network according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention provides a grid-connected detection system of a power distribution network. Fig. 1 is a schematic structural diagram of a grid-connected detection system of a power distribution network according to an embodiment of the present invention. Referring to fig. 1, the grid-connected detection system of the power distribution network is configured in a distribution substation, and specifically includes: the system comprises a grid connection request information acquisition module 10, a control module 20, a power quality detection module 30 and an early warning processing module 40.
The grid connection request information obtaining module 10 is configured to obtain grid connection request information of the distributed power system. The control module 20 is configured to read an electric energy configuration parameter of the distributed power supply system according to the obtained grid connection request information. The power quality detection module 30 is configured to detect whether the power quality of the distributed power system is abnormal based on a numerical relationship between a power configuration parameter of the distributed power system and a preset parameter threshold. The early warning processing module 40 is configured to perform security level division on the distributed power system with abnormal power quality, and perform corresponding early warning processing on the distributed power system according to a security level division result.
Specifically, the distribution substation may be a distribution main station, and after the grid connection request information obtaining module 10 in the distribution substation obtains the grid connection request information of the distributed power system, the grid connection request information may be classified to determine the grid connection request information of the distributed power systems of different types. Different types of distributed power systems include wind, water, and other common types of distributed power on the market. The control module 20 may read the electric energy configuration parameters of the distributed power systems of different types that send the grid connection request information according to the obtained grid connection request information, so as to determine whether the distributed power systems meet the electric energy quality requirement required by grid connection.
Optionally, the grid connection request information obtaining module 10 is further configured to: and obtaining login information and an operation command of the distributed power system according to the grid connection request information. The control module 20 is specifically configured to: and controlling the distributed power supply system according to the login information and the operation command so as to read the electric energy configuration parameters of the distributed power supply system.
The login information of the distributed power supply system comprises a login account and a password of the distributed power supply system. The grid connection request information obtaining module 10 may obtain the grid connection request information of the distributed power systems of different types, and at the same time, may also obtain the login account, the password, and the operation command corresponding to the distributed power systems of different types that send the grid connection request information, so that the control module 20 in the distribution substation may remotely log in the distributed power systems based on the corresponding login account and the password, thereby reading the electric energy configuration parameters of the distributed power systems, and controlling the distributed power systems through the operation command.
Illustratively, the preset parameter threshold value can ensure that the voltage of the distribution substation is qualified, the caused voltage deviation does not exceed an allowable range, the normal operation current of the distribution substation and the distributed power systems of different types does not exceed a rated value, the dynamic thermal stability current does not exceed an allowable value, the short-circuit capacity does not exceed a switch allowable value, the power quality of the distributed power systems of different types is qualified, and the caused voltage sudden rise, sudden drop, flicker and harmonic waves do not exceed specified values.
The power quality detection module 30 may compare the power configuration parameters of different types of distributed power systems with corresponding preset parameter thresholds, for example, when the power configuration parameter of a certain type of distributed power system is higher than the corresponding preset parameter threshold, determine that the power quality of the certain type of distributed power system is abnormal, and when the power configuration parameter of the certain type of distributed power system is lower than the corresponding preset parameter threshold, determine that the power quality of the certain type of distributed power system is abnormal.
The power distribution station divides the distributed power system with abnormal power quality into safety levels through the early warning processing module 40, and performs corresponding early warning processing on the distributed power system according to the safety level division result, which is beneficial to saving the resource ratio required by fault processing of the power distribution station and the distributed power system.
According to the technical scheme of the embodiment of the invention, the grid-connected detection system of the power distribution network is configured in the power distribution station, and comprises the following components: the system comprises a grid connection request information acquisition module, a control module, a power quality detection module and an early warning processing module, wherein the grid connection request information acquisition module is used for acquiring grid connection request information of the distributed power system, the control module is used for reading power configuration parameters of the distributed power system according to the acquired grid connection request information, the power quality detection module is used for detecting whether the power quality of the distributed power system is abnormal or not based on the numerical relationship between the power configuration parameters of the distributed power system and preset parameter thresholds, the early warning processing module is used for dividing the safety level of the distributed power system with the abnormal power quality, and corresponding early warning processing is carried out on the distributed power system according to the safety level division result. Compared with the prior art, the technical scheme of the embodiment of the invention is beneficial to improving the grid-connected efficiency of the power distribution station and the distributed power system and ensuring the grid-connected safety of the power distribution station and the distributed power system through the data interaction among the grid-connected request information acquisition module, the control module, the electric energy quality detection module and the early warning processing module in the power distribution station, thereby improving the power supply reliability of the power distribution station, and in addition, the technical scheme of the embodiment of the invention is also beneficial to timely processing the potential safety hazard when the power distribution station and the distributed power system are connected to the grid so as to reduce the grid-connected failure rate.
On the basis of the foregoing embodiment, optionally, the power configuration parameters of the distributed power supply system include: current parameters, voltage parameters, dynamic thermal stability current parameters, harmonic parameters, short circuit capacity parameters, and flicker parameters. The preset parameter threshold includes: a current safety parameter threshold, a voltage safety parameter threshold, a dynamic thermal stability current safety parameter threshold, a harmonic safety parameter threshold, a short circuit capacity safety parameter threshold, and a flicker safety parameter threshold.
With continued reference to fig. 1, the power quality detection module 30 is specifically configured to: under the condition of meeting the preset judgment condition, judging that the power quality of the distributed power supply system is abnormal, wherein the preset judgment condition comprises the following steps: at least one of the current parameter being above or below a current safety parameter threshold, the voltage parameter being above or below a voltage safety parameter threshold, the thermo-dynamic stability current parameter being above or below a thermo-dynamic stability current safety parameter threshold, the harmonic parameter being above or below a harmonic safety parameter threshold, the short circuit capacity parameter being above or below a short circuit capacity safety parameter threshold, the flicker parameter being above or below a flicker safety parameter threshold.
Optionally, the security level of the distributed power system is divided into a first risk level and a second risk level. With continued reference to fig. 1, correspondingly, the early warning processing module 40 is specifically configured to:
for the distributed power system at the first risk level, performing early warning processing on the distributed power system for adjusting corresponding electric energy configuration parameters according to preset parameter thresholds;
and carrying out early warning treatment for preventing grid connection on the distributed power system of the second risk level.
The first risk level is the distributed power system with the electric energy configuration parameter less than or equal to the preset multiple of the preset parameter threshold value, and the second risk level is the distributed power system with the electric energy configuration parameter greater than the preset multiple of the preset parameter threshold value.
In particular, the first risk level may be a relatively low risk level and the second risk level may be a relatively high risk level. For the safety level division of the distributed power system, the safety level division can be performed according to the actual conditions of the power distribution station and the distributed power system, and the corresponding preset multiple is set according to the actual requirement. Illustratively, the preset multiple may be 1.5 times, and for any distributed power system having an electrical energy configuration parameter less than or equal to 1.5 times a corresponding preset parameter threshold, the distributed power system may be classified as a first risk level, and for any distributed power system having an electrical energy configuration parameter greater than 1.5 times a corresponding preset parameter threshold, the distributed power system may be classified as a second risk level.
For the distributed power system at the first risk level, the early warning processing module 40 may perform early warning processing on the distributed power system according to a preset parameter threshold value to adjust a corresponding electric energy configuration parameter, for example, adjust a current parameter according to a current safety parameter threshold value, adjust a voltage parameter according to a voltage safety parameter threshold value, adjust a dynamic-thermal stability current parameter according to a dynamic-thermal stability current safety parameter threshold value, adjust a harmonic parameter according to a harmonic safety parameter threshold value, adjust a short-circuit capacity parameter according to a short-circuit capacity safety parameter threshold value, and adjust a flicker parameter according to a flicker safety parameter threshold value. For the distributed power system at the second risk level, the distributed power system and the distribution station can be immediately prevented from being connected to the power grid through the early warning processing module 40, so that the safe connection of the distributed power system and the distribution station is ensured.
With continued reference to fig. 1, based on the above embodiments, optionally, the control module 20 is further configured to:
according to the obtained grid-connected request information, updating time limit monitoring is carried out on login information of the distributed power system;
and when the updating time limit of the login information of the distributed power supply system exceeds the set time limit, resetting and reminding the login information of the distributed power supply system.
Illustratively, the control module 20 may monitor the update time limit of the login password of the distributed power system that sends the grid connection request information, and when the update time limit of the login password of the distributed power system exceeds a preset time limit, perform login password reset reminding on the distributed power system to remind the distributed power system to update the login password, which is beneficial to maintaining the safety of the distribution substation and the distributed power system.
Optionally, the distribution station may also perform backup storage on login passwords of different types of distributed power systems that send grid connection request information through the control module 20, and encrypt the backup stored login passwords through an asymmetric encryption algorithm. The login password of the distributed power system is stored in a backup mode, the power distribution station can conveniently control the distributed power system, the login password stored in the backup mode is encrypted through the asymmetric encryption algorithm, and the login password safety is guaranteed.
On the basis of the foregoing embodiments, optionally, the grid-connected detection system of the power distribution network further includes a disconnection module, where the disconnection module is configured to disconnect the distribution substation from the distributed power supply system.
For example, for a distributed power system which is already connected to a distribution substation in a grid mode, when an emergency safety accident occurs in the distributed power system, for example, a natural safety accident such as a fire occurs, the distribution substation may directly cut off the grid-connected connection between the distribution substation and the distributed power system through the cutting module, so as to protect the safety of the distribution substation.
The embodiment of the invention also provides a grid-connected detection method for the power distribution network, which is suitable for grid-connected detection of the power distribution network and can be executed by the grid-connected detection system for the power distribution network in any embodiment. Fig. 2 is a schematic flow diagram of a grid-connected detection method for a power distribution network according to an embodiment of the present invention. Referring to fig. 2, the method specifically includes the following steps:
and S110, acquiring grid connection request information of the distributed power system.
And S120, reading the electric energy configuration parameters of the distributed power supply system according to the acquired grid connection request information.
S130, detecting whether the electric energy quality of the distributed power supply system is abnormal or not based on the numerical relation between the electric energy configuration parameters of the distributed power supply system and the preset parameter threshold value.
And S140, carrying out safety level division on the distributed power system with abnormal power quality, and carrying out corresponding early warning processing on the distributed power system according to the safety level division result.
According to the technical scheme of the embodiment of the invention, the electric energy configuration parameters of the distributed power system are read according to the acquired grid connection request information, whether the electric energy quality of the distributed power system is abnormal or not is detected based on the numerical relation between the electric energy configuration parameters of the distributed power system and the preset parameter threshold value, the distributed power system with the abnormal electric energy quality is subjected to safety level division, and corresponding early warning processing is carried out on the distributed power system according to the safety level division result. Compared with the prior art, the technical scheme of the embodiment of the invention is beneficial to improving the grid-connected efficiency of the power distribution station and the distributed power system and ensuring the grid-connected safety of the power distribution station and the distributed power system through the data interaction among the grid-connected request information acquisition module, the control module, the electric energy quality detection module and the early warning processing module in the power distribution station, thereby improving the power supply reliability of the power distribution station, and in addition, the technical scheme is beneficial to timely processing the potential safety hazard when the power distribution station and the distributed power system are connected to the grid so as to reduce the grid-connected failure rate.
On the basis of the above embodiments, the present embodiment further optimizes the grid-connected detection method for the power distribution network. Fig. 3 is a schematic flow chart of another grid-connected detection method for a power distribution network according to an embodiment of the present invention. Referring to fig. 3, the method specifically includes the following steps:
and S210, acquiring grid connection request information of the distributed power system.
And S220, obtaining login information and an operation command of the distributed power supply system according to the grid connection request information.
And S230, controlling the distributed power supply system according to the login information and the operation command so as to read the electric energy configuration parameters of the distributed power supply system.
S240, detecting whether the electric energy quality of the distributed power supply system is abnormal or not based on the numerical relation between the electric energy configuration parameters of the distributed power supply system and the preset parameter threshold value.
Optionally, the power configuration parameters include: current parameters, voltage parameters, dynamic thermal stability current parameters, harmonic parameters, short circuit capacity parameters and flicker parameters; the preset parameter threshold includes: a current safety parameter threshold, a voltage safety parameter threshold, a dynamic thermal stability current safety parameter threshold, a harmonic safety parameter threshold, a short circuit capacity safety parameter threshold, and a flicker safety parameter threshold.
Correspondingly, step S240 specifically includes: under the condition that the preset judgment condition is met, judging that the electric energy quality of the distributed power supply system is abnormal, wherein the preset judgment condition comprises the following steps: at least one of the current parameter being above or below a current safety parameter threshold, the voltage parameter being above or below a voltage safety parameter threshold, the thermo-dynamic stability current parameter being above or below a thermo-dynamic stability current safety parameter threshold, the harmonic parameter being above or below a harmonic safety parameter threshold, the short circuit capacity parameter being above or below a short circuit capacity safety parameter threshold, the flicker parameter being above or below a flicker safety parameter threshold.
And S250, carrying out safety level division on the distributed power system with abnormal power quality, and carrying out corresponding early warning processing on the distributed power system according to a safety level division result.
Optionally, the security level of the distributed power system is divided into a first risk level and a second risk level; correspondingly, step S250 specifically includes:
for the distributed power system at the first risk level, performing early warning processing on the distributed power system to adjust corresponding electric energy configuration parameters according to a preset parameter threshold;
for the distributed power system at the second risk level, carrying out early warning treatment for preventing grid connection on the distributed power system;
the first risk level is the distributed power system with the electric energy configuration parameter less than or equal to the preset multiple of the preset parameter threshold value, and the second risk level is the distributed power system with the electric energy configuration parameter greater than the preset multiple of the preset parameter threshold value.
On the basis of the foregoing embodiments, optionally, the grid-connected detection method for the power distribution network further includes:
according to the obtained grid connection request information, updating time limit monitoring is carried out on login information of the distributed power system;
and when the updating time limit of the login information of the distributed power supply system exceeds the set time limit, resetting and reminding the login information of the distributed power supply system.
Optionally, the grid-connected detection method for the power distribution network further includes:
and carrying out backup storage on the login password of the distributed power system, and encrypting the login password subjected to backup storage through an asymmetric encryption algorithm.
It should be understood that various forms of the flows shown above, reordering, adding or deleting steps, may be used. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A grid-connected detection system of a power distribution network is characterized in that the grid-connected detection system of the power distribution network is configured in a power distribution station, and comprises: the system comprises a grid connection request information acquisition module, a control module, a power quality detection module and an early warning processing module;
the grid connection request information acquisition module is used for acquiring grid connection request information of the distributed power system;
the control module is used for reading the electric energy configuration parameters of the distributed power supply system according to the acquired grid-connected request information;
the electric energy quality detection module is used for detecting whether the electric energy quality of the distributed power supply system is abnormal or not based on the numerical relation between the electric energy configuration parameter of the distributed power supply system and a preset parameter threshold value;
the early warning processing module is used for carrying out safety level division on the distributed power system with abnormal electric energy quality and carrying out corresponding early warning processing on the distributed power system according to a safety level division result.
2. The grid-connection detection system for the power distribution network according to claim 1, wherein the grid-connection request information obtaining module is further configured to: obtaining login information and an operation command of the distributed power system according to the grid connection request information;
the control module is specifically configured to: and controlling the distributed power supply system according to the login information and the operation command so as to read the electric energy configuration parameters of the distributed power supply system.
3. The grid-tie detection system for the power distribution network according to claim 1, wherein the power configuration parameters include: a current parameter, a voltage parameter, a dynamic thermal stability current parameter, a harmonic parameter, a short circuit capacity parameter and a flicker parameter;
the preset parameter threshold includes: a current safety parameter threshold, a voltage safety parameter threshold, a dynamic thermal stability current safety parameter threshold, a harmonic safety parameter threshold, a short circuit capacity safety parameter threshold and a flicker safety parameter threshold;
the electric energy quality detection module is specifically used for: under the condition of meeting a preset judgment condition, judging that the power quality of the distributed power supply system is abnormal, wherein the preset judgment condition comprises the following steps: at least one of the current parameter being above or below the current safety parameter threshold, the voltage parameter being above or below the voltage safety parameter threshold, the thermo-dynamic stability current parameter being above or below the thermo-dynamic stability current safety parameter threshold, the harmonic parameter being above or below the harmonic safety parameter threshold, the short circuit capacity parameter being above or below the short circuit capacity safety parameter threshold, the flicker parameter being above or below the flicker safety parameter threshold.
4. The grid-connection detection system for the power distribution network according to claim 1, wherein the safety level of the distributed power system is divided into a first risk level and a second risk level;
the early warning processing module is specifically configured to:
for the distributed power system at the first risk level, performing early warning processing on the distributed power system according to the preset parameter threshold value to adjust the corresponding electric energy configuration parameter;
for the distributed power system at the second risk level, carrying out early warning treatment for preventing grid connection on the distributed power system;
the first risk level is the distributed power supply system of which the electric energy configuration parameter is smaller than or equal to a preset multiple of the preset parameter threshold, and the second risk level is the distributed power supply system of which the electric energy configuration parameter is larger than the preset multiple of the preset parameter threshold.
5. The grid-tie detection system for a power distribution network of claim 1, wherein the control module is further configured to:
according to the obtained grid connection request information, updating time limit monitoring is carried out on login information of the distributed power system;
and when the updating time limit of the login information of the distributed power supply system exceeds a set time limit, resetting and reminding the login information of the distributed power supply system.
6. The grid-tie detection system for the power distribution network according to claim 1, further comprising a disconnection module for disconnecting the distribution substation from the distributed power system.
7. A grid-connected detection method of a power distribution network is characterized by comprising the following steps:
acquiring grid-connected request information of a distributed power system;
reading the electric energy configuration parameters of the distributed power supply system according to the acquired grid connection request information;
detecting whether the power quality of the distributed power supply system is abnormal or not based on the numerical relation between the power configuration parameters of the distributed power supply system and preset parameter thresholds;
and carrying out safety level division on the distributed power system with abnormal electric energy quality, and carrying out corresponding early warning processing on the distributed power system according to a safety level division result.
8. The grid-connection detection method for the power distribution network according to claim 7, further comprising:
obtaining login information and an operation command of the distributed power system according to the grid connection request information;
the reading of the electric energy configuration parameters of the distributed power system according to the acquired grid connection request information includes:
and controlling the distributed power supply system according to the login information and the operation command so as to read the electric energy configuration parameters of the distributed power supply system.
9. The grid-connection detection method for the power distribution network according to claim 7, wherein the electric energy configuration parameters comprise: current parameters, voltage parameters, dynamic thermal stability current parameters, harmonic parameters, short circuit capacity parameters and flicker parameters;
the preset parameter threshold includes: a current safety parameter threshold, a voltage safety parameter threshold, a dynamic thermal stability current safety parameter threshold, a harmonic safety parameter threshold, a short circuit capacity safety parameter threshold and a flicker safety parameter threshold;
the detecting whether the power quality of the distributed power supply system is abnormal or not based on the numerical relationship between the power configuration parameter of the distributed power supply system and a preset parameter threshold comprises the following steps:
under the condition of meeting a preset judgment condition, judging that the power quality of the distributed power supply system is abnormal, wherein the preset judgment condition comprises the following steps: at least one of the current parameter being above or below the current safety parameter threshold, the voltage parameter being above or below the voltage safety parameter threshold, the thermo-kinetic stabilization current parameter being above or below the thermo-kinetic stabilization current safety parameter threshold, the harmonic parameter being above or below the harmonic safety parameter threshold, the short circuit capacity parameter being above or below the short circuit capacity safety parameter threshold, the flicker parameter being above or below the flicker safety parameter threshold.
10. The grid-connection detection method for the power distribution network according to claim 7, wherein the safety level of the distributed power system is divided into a first risk level and a second risk level;
the method for dividing the distributed power system with abnormal power quality into safety levels and performing corresponding early warning processing on the distributed power system according to the safety level division result comprises the following steps:
for the distributed power system at the first risk level, performing early warning processing on the distributed power system according to the preset parameter threshold value to adjust the corresponding electric energy configuration parameter;
for the distributed power system at the second risk level, carrying out early warning treatment for preventing grid connection on the distributed power system;
the first risk level is the distributed power supply system of which the electric energy configuration parameter is smaller than or equal to a preset multiple of the preset parameter threshold, and the second risk level is the distributed power supply system of which the electric energy configuration parameter is larger than the preset multiple of the preset parameter threshold.
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