WO2026007485A1 - 配电网网格化保护方法、装置、设备、介质及程序产品 - Google Patents
配电网网格化保护方法、装置、设备、介质及程序产品Info
- Publication number
- WO2026007485A1 WO2026007485A1 PCT/CN2025/087181 CN2025087181W WO2026007485A1 WO 2026007485 A1 WO2026007485 A1 WO 2026007485A1 CN 2025087181 W CN2025087181 W CN 2025087181W WO 2026007485 A1 WO2026007485 A1 WO 2026007485A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- branch
- grid
- boundary
- protection
- switch
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
Definitions
- This application relates to the field of power system relay protection, such as a distribution network grid protection method, device, equipment, medium, and program product.
- Relay protection is an important measure for detecting faults or abnormalities in a power system, issuing alarm signals, or directly isolating or disconnecting the faulty portion. Therefore, appropriate relay protection is configured at each level of switches in the distribution network so that switches at each level can be disconnected in a timely manner when a fault occurs in the distribution network, thus reliably isolating the fault.
- staged overcurrent protection is typically configured for substation outgoing switches, branch switches, and customer boundary switches according to a three-level coordination model. This means that corresponding overcurrent protection is set for each of the substation outgoing switches, branch switches, and customer boundary switches, and the protection settings and operating times of each switch are coordinated. Each switch disconnects to clear the fault after the current reaches the protection setting and the corresponding operating time has elapsed.
- distributed generation can increase the short-circuit current in the distribution network, causing the switch to operate beyond its rated capacity, or decrease the short-circuit current, making it difficult for the switch to clear the fault in time, or generate a reverse short-circuit current, causing the switch to malfunction.
- protection devices are usually installed at each switch, and communication channels need to be established between each protection device to configure differential protection or longitudinal protection at each switch.
- the protection device corresponding to each switch needs to collect the current information of all branches within the protected area to determine whether a short circuit has occurred within the protected area.
- the switch corresponding to that branch promptly disconnects the fault, and the switch in that branch promptly sends a blocking signal to the upstream switch, such as to the switch on the main line, to indicate that the switch corresponding to that branch has been disconnected.
- the switch on the main line responds to this blocking signal and no longer performs a disconnection action; only the switch corresponding to the branch disconnects to isolate the fault area. If the switch on the main line does not receive a blocking signal, the switch on the main line disconnects, and the switch on the main line isolates the fault area.
- the methods in the relevant technologies require the establishment of communication channels between various protection devices so that the protection devices of lower-level switches can transmit communication signals to the protection devices of higher-level switches, such as the protection device of a branch line switch transmitting a blocking signal to the protection device of a main line switch.
- This application aims to provide a method, device, equipment, medium, and program product for grid-based protection of power distribution networks.
- a grid-based protection method for distribution networks includes: identifying boundary switches from various switches in the distribution network lines; dividing the distribution network lines according to the boundary switches to determine load grids, branch grids, and main grids; determining a two-stage overcurrent protection mechanism for the boundary switches in the load grid according to preset load grid rules; determining the branch protection operation duration of the boundary switches in the branch grid based on first protection configuration information in the distribution network area corresponding to the branch grid; determining the two-stage overcurrent protection mechanism for the boundary switches in the branch grid based on the branch protection operation duration; determining the main protection operation duration of the boundary switches in the main grid based on second protection configuration information in the distribution network area corresponding to the main grid; and determining the directional longitudinal protection mechanism for the boundary switches in the main grid based on the main protection operation duration.
- the first protection configuration information is the protection mechanism information of the boundary switches in the distribution network area corresponding to the branch grid, whose protection mechanism has been determined;
- the second protection configuration information is the protection mechanism information of the boundary switches in the distribution network area corresponding to the main grid, whose protection mechanism has been determined.
- a grid-based protection device for a distribution network which includes a boundary switch determination module, a grid division module, a load mechanism determination module, a branch protection duration determination module, a branch mechanism determination module, a main line protection duration determination module, and a main line mechanism determination module.
- the boundary switch determination module is configured to identify the boundary switches from each switch in the distribution network line.
- the load mechanism determination module is configured to determine the two-stage overcurrent protection mechanism of the boundary switches in the load grid based on the preset load grid rules; the branch protection duration determination module is configured to determine the branch protection operation duration of the boundary switches of the branch grid based on the first protection configuration information of the distribution network area corresponding to the branch grid; the branch mechanism determination module is configured to determine the two-stage overcurrent protection mechanism of the boundary switches of the branch grid based on the branch protection operation duration; the main line protection duration determination module is configured to determine the main line protection operation duration of the boundary switches of the main line grid based on the second protection configuration information of the distribution network area corresponding to the main line grid; and the main line mechanism determination module is configured to determine the directional longitudinal protection mechanism of the boundary switches of the main line grid based on the main line protection operation duration.
- the first protection configuration information consists of the protection mechanism information for the boundary switches in the distribution network area corresponding to the branch grid, for which the protection mechanism has already been determined.
- the second protection configuration information consists of the protection mechanism information for the boundary switches in the distribution network area corresponding to the main grid, for which the protection mechanism has already been determined.
- a computer program product includes a computer program stored on a computer-readable storage medium, the computer program including program instructions that, when executed by a computer, cause the computer to perform the method described above.
- the distribution network lines are divided into load grids, branch grids, and mainline grids. Protection mechanisms are then sequentially configured for the boundary switches of each grid.
- the branch protection operation duration of the boundary switches is determined based on the first protection configuration information within the distribution network area of the branch grid.
- mainline protection operation duration of the boundary switches is determined based on the second protection configuration information within the distribution network area of the mainline grid.
- Figure 1 is a flowchart illustrating the distribution network grid protection method provided in an embodiment of this application
- Figure 2 is an example diagram of a power distribution network line after grid division according to an embodiment of this application
- FIG. 3 is a flowchart illustrating step S110 of determining the boundary switch according to an embodiment of this application
- Figure 4 is a flowchart illustrating step S112 of determining the branch boundary switch provided in an embodiment of this application;
- FIG. 5 is a flowchart illustrating step S120 of mesh division provided in an embodiment of this application.
- FIG. 6 is a flowchart illustrating step S140 of determining the duration of branch protection operation provided in an embodiment of this application.
- Figure 7 is an example diagram of the protection mechanism corresponding to each grid of the distribution network line example provided in the embodiments of this application;
- Figure 8 is a flowchart illustrating step S150 of determining the overcurrent protection mechanism of the branch grid according to an embodiment of this application.
- Figure 9 is a flowchart illustrating step S160 of determining the duration of the main line protection action provided in an embodiment of this application.
- Figure 10 is a flowchart illustrating the protection mechanism for determining the outgoing switch of a substation provided in an embodiment of this application.
- Figure 13 is a schematic diagram of an electronic device provided in an embodiment of this application.
- Switches are typically installed on the main lines, branch lines, and terminal load lines of a distribution network.
- substation outgoing line switches, sectionalizing switches, and tie switches are generally installed on the main lines of the distribution network; branch switches are generally installed on the branch lines of the distribution network; and user boundary switches are generally installed on the terminal load lines of the distribution network.
- the electronic equipment can determine the substation outgoing switch, sectionalizing switch 1, tie switch, user boundary switch 1, branch switch 2, user boundary switch 2, user boundary switch 3, user boundary switch 4, branch switch 3, user boundary switch 5, and user boundary switch 6 as boundary switches respectively.
- the main grid is the distribution network area corresponding to two adjacent main line boundary switches.
- the main line boundary switch is the boundary switch located on the main line.
- the electronic equipment divides the area between the substation outgoing switch and the sectionalizing switch 1 into one main grid, and the area between the sectionalizing switch 1 and the tie switch into another main grid.
- two-stage overcurrent protection can be configured for the boundary switches in the load grid.
- the two-stage overcurrent protection includes stage I overcurrent protection and stage II overcurrent protection.
- the preset load grid rules are pre-set protection configuration rules, specifically including setting the first stage overcurrent protection of the load grid to be a time-delayed overcurrent protection, and setting the second stage load action duration of the second stage overcurrent protection of the load grid to a preset load delay duration.
- the first stage of overcurrent protection is used to disconnect the fault without delay when a short circuit or other fault occurs in the load grid.
- the second stage of overcurrent protection is used to disconnect after a delay when an abnormal disturbance occurs in the load grid. If the abnormal disturbance can disappear on its own within the operating time of the second stage load, the overcurrent protection device corresponding to the second stage of overcurrent protection will not operate, so that the load can continue to operate normally.
- the electronic device can directly determine the two-stage overcurrent protection mechanism for each load grid according to the preset load grid rules.
- the two-stage overcurrent protection mechanism includes the first-stage load operation duration of stage I overcurrent protection and the second-stage load operation duration of stage II overcurrent protection. It is worth noting that the first-stage load operation duration of the load grid is 0, and the second-stage load operation duration is the preset load delay duration.
- the electronic equipment can feed back the two-stage overcurrent protection mechanism of the load grid to the staff, who can then configure the corresponding relay protection for the boundary switches of each load grid.
- step S140 the branch protection operation duration of the boundary switch of the branch grid is determined based on the first protection configuration information of the distribution network area corresponding to the branch grid.
- the first protection configuration information is the protection mechanism information of the boundary switches in the distribution network area corresponding to the branch grid, whose protection mechanism has been determined.
- the branch grid corresponding to branch switch 2 includes the load grid corresponding to user boundary switch 2, the load grid corresponding to user boundary switch 3, and the load grid corresponding to user boundary switch 4.
- the protection mechanisms of user boundary switch 2, user boundary switch 3, and user boundary switch 4 have been determined by the electronic device in step S130.
- the first protection configuration information corresponding to the branch switch 2 includes the first-stage load operation duration and the second-stage load operation duration of the user boundary switch 2, the first-stage load operation duration and the second-stage load operation duration of the user boundary switch 3, and the first-stage load operation duration and the second-stage load operation duration of the user boundary switch 4.
- the first protection configuration information corresponding to the branch grid is an empty set.
- step S150 the two-stage overcurrent protection mechanism of the boundary switch of the branch grid is determined according to the branch protection action duration.
- the load grid determines the corresponding protection mechanism in accordance with the above-described step S130.
- the electronic device can determine the branch protection operation duration of the branch grid boundary switch based on the first protection configuration information; and in step S150, the electronic device can determine the protection mechanism of the branch grid boundary switch based on the branch protection operation duration.
- the boundary switches of the branch grid are configured with two stages of overcurrent protection.
- the operating time of the branch protection includes a first-stage branch operating time and a second-stage branch operating time.
- the boundary switches of the branch grid disconnect after the first-stage branch operating time.
- the boundary switches of the branch grid disconnect after the second-stage branch operating time.
- the boundary switch of the branch grid must be able to disconnect in a timely manner if the boundary switch of the load grid or other downstream switches fail to disconnect and isolate the fault.
- the duration of the first branch line operation and the duration of the second branch line operation can be determined based on the first protection configuration information within the branch line grid. For example, referring to FIG2, for branch switch 2, the electronic device can set the duration of the first branch line operation of branch switch 2 to be greater than the duration of the first load operation of each lower-level boundary switch in step S130, and the duration of the second branch line operation to be greater than the duration of the second load operation of each lower-level boundary switch.
- the branch switch 2 can operate automatically to reliably clear the fault.
- step S160 the main protection operation duration of the boundary switch of the main grid is determined based on the second protection configuration information of the distribution network area corresponding to the main grid.
- the second protection configuration information is the protection mechanism information of the boundary switches in the distribution network area corresponding to the main grid, for which the protection mechanism has been determined.
- the electronic equipment determines the protection mechanisms corresponding to the boundary switches of the load grid and the boundary switches of the branch grid, respectively. That is, the second protection configuration information corresponding to the main grid includes the load protection operation duration of the boundary switches of each load grid in the distribution network area and the branch protection operation duration of the boundary switches of each branch grid.
- the distribution network area corresponding to this main grid includes the load grid corresponding to the user sectionalizing switch 1. Therefore, the first protection configuration information corresponding to this main grid includes the first-stage protection operation duration and the second-stage protection operation duration of the user sectionalizing switch 1.
- the second protection configuration information corresponding to the main grid is an empty set.
- step S170 the directional longitudinal protection mechanism of the boundary switches of the main line grid is determined based on the main line protection operation duration.
- step S160 the electronic device can determine the mainline protection operation duration of each mainline grid based on the protection mechanisms set by the boundary switches of each load grid and the boundary switches of the branch grid. Then, in step S170, the electronic device can determine the directional longitudinal protection mechanism of the boundary switches of the mainline grid based on the mainline protection operation duration.
- directional longitudinal protection is a protection device that causes both sides of the circuit breaker to trip rapidly and simultaneously when a line fault occurs. It uses a specific relationship between the discrimination quantities on both sides of the line as the criterion. That is, both sides transmit the discrimination quantities to the opposite side via a channel, and then both sides determine whether the fault is within the fault zone or outside the fault zone according to the relationship between the discrimination quantities of the opposite side and their own side.
- the lower-level boundary switches within the primary grid can first clear the fault. If the lower-level boundary switches fail to clear the fault in time, the two boundary switches of the primary grid will then be disconnected to clear the entire area.
- the lower-level boundary switches within the primary grid refer to the boundary switches of the lower-level grids.
- the main line operation time of the boundary switch of the main line grid is determined according to the protection operation time of the lower boundary switch within the main line grid.
- the electronic device can set the main line protection operation time of the longitudinal protection of the substation outgoing switch and the sectionalizing switch 1, so that the main line protection operation time is longer than the load operation time of the user sectionalizing switch 1.
- the fault is cleared by user boundary switch 1 within the main line protection operation time.
- the fault is isolated from other grids, and the permission signals of substation outgoing switches and sectionalizing switches 1 are returned.
- the main line grid protection will not operate. If user boundary switch 1 does not operate within the main line protection operation time, that is, if user boundary switch 1 does not clear the fault in time, and the fault duration reaches the main line protection operation time of the directional longitudinal protection device set by substation outgoing switches and sectionalizing switches 1, the fault in the load grid corresponding to user boundary switch 1 will be cleared by substation outgoing switches and sectionalizing switches 1. This ensures that the fault in the load grid corresponding to user boundary switch 1 will not affect the equipment in other main line grids in the distribution network, nor will it affect the substation.
- the boundary switches of the branch grid need to communicate with the boundary switches of the main grid and send blocking signals to the main grid.
- the protection action duration of each lower-level boundary switch includes the branch line protection action duration of the boundary switch of the branch line grid and the load protection action duration of the boundary switch of the load grid
- directional longitudinal protection can adopt permissive directional longitudinal protection.
- determining the directional longitudinal protection mechanism of the main grid in step S170 further includes: determining the signal transmission mechanism and the operation mechanism of the main grid, and determining the directional longitudinal protection mechanism of the main grid based on the signal transmission mechanism and the operation mechanism of the main grid.
- an electronic device can determine a preset signal transmission mechanism as the signal transmission mechanism for the mainline grid.
- This preset signal transmission mechanism includes: sending a first allow signal to each boundary switch in the mainline grid when the boundary switches of the mainline grid satisfy the current criterion and the fault direction points to the mainline grid; sending a second allow signal to each boundary switch in the mainline grid when the boundary switches of the mainline grid do not satisfy the current criterion; and not sending an allow signal when the boundary switches of the mainline grid satisfy the current criterion and the fault direction does not point to the mainline grid.
- the allow signal includes both the first allow signal and the second allow signal.
- the boundary switch of the main grid when the current flowing through the boundary switch of the main grid reaches a preset value, it indicates that the boundary switch of the main grid satisfies the current criterion.
- the protection device corresponding to the substation outgoing switch determines in real time whether the substation outgoing switch meets the current criterion and whether the fault direction points to this grid.
- the protection device corresponding to sectionalizing switch 1 also makes real-time judgments.
- the protection device corresponding to the substation outgoing switch determines that the boundary switch meets the current criterion and the fault direction points to this main grid, the protection device sends a first permission signal to sectionalizing switch 1; if the protection device corresponding to the substation outgoing switch determines that the boundary switch does not meet the current criterion, it sends a second permission signal to sectionalizing switch 1; if the protection device corresponding to the substation outgoing switch determines that the boundary switch meets the current criterion and the fault direction does not point to this grid, it neither issues the first permission signal nor the second permission signal.
- the electronic device can determine the preset action mechanism as the action mechanism of the boundary switch of the main grid.
- the preset action mechanism includes determining whether the boundary switch of the main grid meets a first preset action exit condition and whether it meets a second preset action exit condition; if the first preset action exit condition or the second preset action exit condition is met, the directional longitudinal protection device is activated, that is, the boundary switch of the main grid is opened to clear the fault.
- the first preset action exit condition includes: the protection starting element of the boundary switch meeting the starting condition; the boundary switch issuing a first permission signal; receiving permission signals from all other boundary switches in the main grid; and the fault duration reaching the main line protection action duration corresponding to the boundary switch. It is worth noting that receiving either the first permission signal from any boundary switch or the second permission signal from any boundary switch signifies receiving the permission signal from that boundary switch.
- the second preset action exit conditions include: the protection starting element of the boundary switch meets the starting conditions; the boundary switch issues a second permission signal; and the boundary switch receives permission signals sent by all other boundary switches in the main grid; at least one of the received permission signals is a first permission signal; and the fault duration reaches the main line protection action duration corresponding to the boundary switch.
- the starting elements of directional longitudinal protection may specifically include overcurrent starting elements and/or undervoltage starting elements.
- the starting elements include both overcurrent starting elements and undervoltage starting elements.
- the overcurrent starting element meets the preset current starting element and/or the undervoltage starting element meets the preset voltage starting element, it indicates that the protection starting element of the boundary switch meets the starting conditions.
- the distribution network lines are divided into load grids, branch grids, and mainline grids. Protection mechanisms are then sequentially configured for the boundary switches of each grid.
- the branch protection operation duration of the boundary switches is determined based on the first protection configuration information within the distribution network area of the branch grid.
- mainline protection operation duration of the boundary switches is determined based on the second protection configuration information within the distribution network area of the mainline grid.
- This application embodiment does not require transmitting blocking signals or current information between various boundary switches. Instead, it only requires the protection action durations of the boundary switches between various grids to coordinate with each other. In the event of a line fault, the boundary switches of the grid to which the faulty line belongs will sequentially disconnect the fault in the order of load grid, branch grid, and main grid.
- the boundary switch is determined from each switch of the distribution network line, which may specifically include steps S111, S112 and S113.
- step S111 the main line boundary switch is determined based on the main line switch on the main line of the distribution network.
- boundary switches can be divided into main line boundary switches, branch line boundary switches, and load boundary switches based on their different installation locations.
- Electronic equipment can sequentially determine the boundary switches along the main line, each branch line, and the terminal load line. Switches determined on the main line are main line boundary switches, switches determined on branch lines are branch line boundary switches, and switches determined on load boundary switches are load boundary switches.
- the main line switch on the main line of the distribution network line may specifically include substation outgoing line switches, sectionalizing switches, and tie switches, as shown in Figure 2.
- the electronic device in step S111, can identify each mainline switch as a boundary switch.
- the electronic device determining the main line boundary switch may further include starting from the substation outgoing line switch, and sequentially determining the main line switches that meet the preset threshold conditions from each main line switch along the main line of the distribution network.
- the preset threshold condition is that the total load capacity of the distribution line segment between two adjacent main line boundary switches exceeds the preset load capacity value, or the number of branch lines connected in the distribution line segment is not less than the preset number of branch lines.
- substation outgoing line switches, sectionalizing switches 1, 2, 3, ... n are sequentially installed.
- the electronic equipment identifies it as the main line boundary switch.
- the electronic equipment determines whether sectionalizing switch 1 and the current boundary switch meet preset threshold conditions, that is, whether the total load capacity between the substation outgoing line switch and sectionalizing switch 1 exceeds a preset load capacity value, and whether the number of branch lines connected in the distribution line segment between the substation outgoing line switch and sectionalizing switch 1 is not less than a preset number of branch lines.
- the electronic equipment determines whether the current boundary switch and sectionalizing switch 2 meet the preset threshold conditions, that is, whether the substation outgoing line switch and sectionalizing switch 2 meet the preset threshold conditions.
- step S112 the branch line boundary switch is determined based on the branch switches on the branch lines of the distribution network and the boundary switches connected to the distributed power sources.
- a branch switch is a switch that controls the connection between a branch line and the main line.
- the electronic device can identify each branch switch on the branch line of the distribution network line as a branch boundary switch, and identify the boundary switch connected to the distributed power source as a branch boundary switch.
- the electronic device determining the branch boundary switch may further include steps S1121 and S1122.
- the target branch is a branch among all branches that has at least two main line switches on the main line segment between the branch and the substation busbar.
- the branch corresponding to branch switch 1 shown in Figure 2 has only one substation outgoing switch on the main line between this branch and the substation busbar, so the branch corresponding to branch switch 1 is not a target branch.
- the branches corresponding to branch switches 2 and 3 are both target branches.
- the electronic device determines the boundary switches on the branch line and the boundary switches on the main line in steps S111 and S112. For switches connected to the load, that is, for user boundary switches in the terminal load line, the electronic device can determine each user boundary switch as a load boundary switch in step S113.
- several terminal load lines can be merged to determine the upstream common branch switch of the several terminal load lines as the load boundary switch.
- a small branch line a1 is connected to branch line a, and several terminal load lines are connected to the small branch line a1.
- a branch switch a1 is configured at the beginning of the small branch line a1.
- the branch switch a1 is the upstream common branch switch of the several terminal load lines. Therefore, in step S113, the electronic equipment can use the branch switch a1 as the load boundary switch of these terminal load lines.
- the power grid lines are allocated according to the boundary switch to determine the load grid, branch grid and main grid, which may specifically include steps S121, S122, S123, S124, S125 and S126.
- step S121 the first boundary switch is determined from the boundary switches.
- the first boundary switch is a boundary switch for which there are no other boundary switches in the downstream distribution network area, and also a boundary switch for which there are no large-capacity distributed power sources in the downstream distribution network area.
- a boundary switch for which there are no large-capacity distributed power sources in the downstream distribution network area For example, referring to Figure 2, in the distribution network line shown in Figure 2, for each of the user boundary switches 1, 2, 3, 4, and 5, there are no other boundary switches or large-capacity distributed power sources in the downstream distribution network area. Therefore, user boundary switches 1, 2, 3, 4, and 5 are the first boundary switches.
- step S121 the electronic device can determine the first boundary switch, and then the electronic device can determine the load grid based on the first boundary switch.
- step S122 the first boundary switch and the downstream distribution network area of the first boundary switch are divided into load grids.
- the electronic device can divide the user boundary switch 1 and the downstream distribution network area of the user boundary switch 1 into load grid 1, divide the user boundary switch 2 and the downstream distribution network area of the user boundary switch 2 into load grid 2, divide the user boundary switch 3 and the downstream distribution network area of the user boundary switch 3 into load grid 3, divide the user boundary switch 4 and the downstream distribution network area of the user boundary switch 4 into load grid 4, and divide the user boundary switch 5 and the downstream distribution network area of the user boundary switch 5 into load grid 5.
- a second boundary switch is determined from the boundary switches.
- the second boundary switch is a boundary switch that satisfies the preset division conditions.
- step S124 the second boundary switch and the downstream distribution network area of the second boundary switch are divided into branch grids.
- the preset division conditions include a first preset division condition and a second preset division condition.
- the first preset division condition is that the boundary switch is located on a non-main line in the distribution network line, and there is a load grid in the downstream distribution network area of the boundary switch.
- the electronic device can identify each boundary switch located on the non-main line, and then select the boundary switches with load grids or large-capacity distributed power sources in the downstream distribution network area from the boundary switches on the non-main line to identify the second boundary switch.
- step S124 the electronic device identifies the second boundary switch and the downstream distribution network area of the second boundary switch as a branch grid.
- step S125 the third boundary switch is determined from the boundary switches.
- the third boundary switch is a boundary switch located on the main line.
- the electronic equipment identifies the boundary switch located on the main line as the third boundary switch.
- step S120 after dividing the load grid, branch grid, and main grid according to the boundary switches, the electronic device can set the protection mechanism of the boundary switches corresponding to each grid.
- step S140 the branch protection operation duration of the branch boundary switch is determined according to the first protection configuration information of the distribution network area corresponding to the branch grid, including steps S141, S142a and S142b.
- step S141 it is determined whether there are subordinate grids in the branch grid.
- the subordinate grid of the branch grid refers to other grids contained in the distribution network area corresponding to the branch grid.
- the distribution network area corresponding to the branch grid includes the load grid corresponding to user boundary switch 2, the load grid corresponding to user boundary switch 3, and the load grid corresponding to user boundary switch 4. Therefore, the lower-level grid of the branch grid corresponding to branch switch 2 includes the load grid corresponding to user boundary switch 2, the load grid corresponding to user boundary switch 3, and the load grid corresponding to user boundary switch 4.
- the electronic device in step S141, can directly identify whether there is a subordinate grid in the branch grid based on the gridded distribution network lines, or it can determine whether there is a subordinate grid in the branch grid based on the first protection configuration information. For example, if the first protection configuration information is an empty set, it indicates that there is no subordinate grid in the branch grid; if the first protection configuration information is not an empty set, it indicates that there is a subordinate grid in the branch grid.
- step S141 if the electronic device determines that there is no lower-level grid in the branch grid, the electronic device determines the first branch action duration and the second branch action duration of the boundary switch of the branch grid, which may specifically include step S142a.
- step S142a the first preset duration is determined as the duration of one branch action; and the second preset duration is determined as the duration of two branch actions.
- the second preset duration is greater than the first preset duration, and the difference between the second preset duration and the first preset duration is the first preset delay duration.
- the first preset duration can be 0 seconds.
- the first preset delay duration can be any value between 0.1 seconds and 0.6 seconds, and the value of the first preset delay duration can be set by the user as needed.
- step S142a when there is no subordinate grid in the branch grid, such as the branch grid corresponding to the user boundary switch 6 shown in Figures 2 and 7, the protection mechanism of the boundary switch corresponding to the branch grid does not need to cooperate with other subordinate boundary switches. Therefore, the electronic device can directly set the action duration of one branch to 0s and the action duration of the two branch to be equal to the first preset delay duration, such as 0.2s.
- step S141 when the electronic device determines that there is a subordinate grid in the branch grid, the electronic device determines the first branch action duration and the second branch action duration of the boundary switch of the branch grid, which may specifically include step S142b.
- step S142b based on the first protection configuration information, a maximum lower-level action duration and a maximum lower-level action duration are determined; a second preset delay duration is added to the maximum lower-level action duration to obtain a branch line action duration; and a third preset delay duration is added to the maximum lower-level action duration to obtain two branch line action durations.
- the protection mechanism of the boundary switch corresponding to the branch grid needs to cooperate with the boundary switch of the subordinate grid.
- the maximum duration of a single lower-level action is the longest duration among the single-action durations corresponding to the lower-level grid of the branch line
- the maximum duration of two lower-level actions is the longest duration among the two single-action durations corresponding to the lower-level grid of the branch line.
- the lower-level grid includes the load grid corresponding to user sectionalizing switch 5 and the branch grid corresponding to distributed power sources.
- the maximum duration of a single lower-level action is the maximum value between the single-load action duration of user sectionalizing switch 5 and the single-branch action duration of user sectionalizing switch 6; the maximum duration of two lower-level actions is the maximum value between the two-branch action durations of user sectionalizing switch 5 and the two-branch action durations of user sectionalizing switch 6.
- step S142b the electronic device superimposes a second preset delay duration on a maximum lower-level duration to obtain a branch action duration.
- the electronic device superimposes a third preset delay duration on two maximum lower-level durations to obtain two branch action durations.
- the electronic device can determine the branch protection operation duration of the branch grid boundary switch according to steps S141, S142a, and S142b. Then, in step S150, the electronic device can determine the configuration of a two-stage overcurrent protection mechanism for the branch grid boundary switch based on the branch protection operation duration. Referring to Figure 8, step S150 specifically includes steps S151, S152a, and S152b.
- step S151 it is determined whether there is a large-capacity distributed power source in the distribution network area corresponding to the branch grid.
- the method by which the electronic device determines whether a large-capacity distributed power source exists may specifically include: determining whether the upstream minimum short-circuit current is less than the downstream maximum short-circuit current.
- the upstream minimum short-circuit current is the minimum short-circuit current provided by all power sources in the upstream region of the boundary switch when a fault occurs in the downstream region of the boundary switch.
- the downstream maximum short-circuit current is the maximum short-circuit current provided by all distributed power sources in the downstream region of the boundary switch when a fault occurs in the upstream region of the boundary switch.
- an electronic device determines that the minimum short-circuit current upstream is less than the maximum short-circuit current downstream, it can confirm that there is a large-capacity distributed power source downstream of the boundary switch.
- the electronic device determines the protection mechanism of the boundary switch corresponding to the branch grid in the following way: step S152a.
- step S152a when there is a large-capacity distributed power source in the distribution network area corresponding to the branch grid, the two-stage directional overcurrent protection mechanism of the boundary switch of the branch grid is determined according to the branch protection operation time.
- the electronic device determines the protection mechanism of the boundary switch corresponding to the branch grid in the following way: step S152b.
- step S152b if there is no large-capacity distributed power source in the distribution network area corresponding to the branch grid, the two-stage overcurrent protection mechanism of the boundary switch of the branch grid is determined according to the branch protection operation time.
- two-stage directional overcurrent protection can be configured at the boundary switch of the branch grid when there are large-capacity distributed power sources in the distribution network area of the branch grid, so as to avoid the problem of protection maloperation caused by large-capacity distributed power sources in the event of short-circuit faults.
- step S160 the electronic device determines the main protection operation duration of the boundary switch of the main grid according to the second protection configuration information of the distribution network area corresponding to the main grid, which may include steps S161, S162a and S162b.
- step S161 it is determined whether there is a primary sub-grid in the distribution network area corresponding to the primary grid.
- the primary subgrid includes a load grid and a branch grid.
- step S161 the electronic device determines whether there is a load grid and a branch grid in the distribution network area corresponding to the main grid.
- the electronic device can determine the main grid operation duration in a manner that may specifically include step S162a.
- step S162a the mainline operation duration of the boundary switch of the mainline grid is determined to be 0. That is, the electronic equipment determines that the mainline operation duration is 0, which means that the boundary switch of the mainline grid is configured with no-delay directional longitudinal protection.
- the electronic device can determine the main grid's main operation duration, which may specifically include step S162b.
- step S162b based on the second protection configuration information, a maximum action duration is determined from the protection action durations corresponding to each of the primary and secondary grids; and a fourth preset delay duration is superimposed on the maximum action duration to obtain the main line protection action duration of the boundary switch of the primary grid.
- main grid 1 (the main grid between the substation outgoing switch and sectionalizing switch 1)
- main grid 1 has a lower-level grid, which is the load grid corresponding to user sectionalizing switch 1.
- the electronic equipment determines the operating duration of a load segment corresponding to user sectionalizing switch 1 as the maximum operating duration.
- the operating duration of the load segment corresponding to user sectionalizing switch 1 is 0, therefore the maximum operating duration is 0.
- the maximum operating time of a segment is the operating time of a branch line segment of branch switch 2 or branch switch 3.
- the operating time of a branch line segment of branch switch 2 and branch switch 3 is determined in the manner described in the above embodiments, and is the second preset delay time.
- the main protection operating time of this main grid is the second preset delay time + the fourth preset delay time.
- directional longitudinal protection is set as the main protection for the boundary switches of the main grid.
- two-stage overcurrent protection is also configured as backup protection for the substation outgoing line switches.
- the outgoing line protection operating time of this two-stage overcurrent protection needs to be coordinated with the protection operating time of each downstream grid of the substation outgoing line switch, so that the substation outgoing line switch can operate to clear the fault when a fault occurs and other downstream grids have not operated.
- the method may further include steps S180 and S190.
- step S180 the outgoing protection operating time of the substation outgoing switch in the distribution network line is determined based on the protection operating time of each boundary switch in the distribution network line.
- the substation outgoing switch is located at the substation's outlet, and the entire distribution network line connected to this outgoing switch is the downstream area of the outgoing switch.
- Each main grid, branch grid, and load grid in this distribution network line is a downstream grid of the outgoing switch.
- the protection operation time of the boundary switches of each downstream grid is the protection operation time of each boundary switch in the distribution network line.
- Electronic equipment can determine the outgoing protection action duration of the substation outgoing switches based on the protection action duration of each boundary switch, so as to coordinate with the setting of the protection mechanism of each boundary switch in the distribution network.
- step S190 the two-stage overcurrent protection mechanism of the substation outgoing switch is determined based on the outgoing protection operation duration.
- step S190 the electronic device can determine the two-stage overcurrent protection mechanism of the substation outgoing switch based on the outgoing protection operation duration, so as to configure two-stage overcurrent protection on the substation outgoing switch as backup protection.
- the outgoing line protection operation duration includes a first-stage outgoing line protection duration and a second-stage outgoing line protection duration.
- the first-stage outgoing line protection duration is the protection operation duration corresponding to the overcurrent protection stage I of the substation outgoing line switch.
- the second-stage outgoing line protection duration is the protection operation duration corresponding to the overcurrent protection stage II of the substation outgoing line switch.
- step S180 the outgoing protection action duration of the substation outgoing switch in the distribution network line is determined based on the protection action duration of each boundary switch in the distribution network line. Specifically, this may include steps S181, S182, and S183.
- step S181 the longest duration among the branch line operation duration, the load operation duration, and the main line protection operation duration is determined as the longest duration.
- step S181 the electronic device determines the maximum duration from the load operation duration of each load grid, the branch operation duration of each branch grid, and the main protection operation duration of each main grid.
- the maximum duration is the maximum segment duration.
- the longest duration of the operation of a load segment in each load grid, the longest duration of the operation of a branch line segment in each branch grid, and the longest duration of the operation of the main line protection in each main grid is the duration of the operation of the main line protection of the sectionalizing switch 1 and the tie switch.
- step S182 a fifth preset delay time is added to the maximum duration to determine the duration of outgoing line protection for the substation outgoing line switch.
- step S183 a sixth preset delay time is added to the first outgoing line protection duration to determine the second outgoing line protection duration of the substation outgoing line switch.
- the maximum duration is the main line protection operation duration of sectionalizing switch 1 and tie switch.
- the electronic equipment adds a fifth preset delay duration to the main line protection operation duration of sectionalizing switch 1 and tie switch to determine the first-stage outgoing line protection duration of the substation outgoing line switch.
- the electronic equipment adds a sixth preset delay duration to the first-stage outgoing line protection duration to determine the second-stage outgoing line protection duration of the substation outgoing line switch.
- the above embodiments describe a method for configuring grid-based protection in a distribution network from the perspective of process flow.
- the following embodiments describe a device for grid-based protection in a distribution network from the perspective of virtual modules or virtual units. For details, please refer to the following embodiments.
- a grid-based protection device for a power distribution network includes: a boundary switch determination module 1201, a grid division module 1202, a load mechanism determination module 1203, a branch protection duration determination module 1204, a branch mechanism determination module 1205, a main line protection duration determination module 1206, and a main line mechanism determination module 1207.
- Boundary switch determination module 1201 is configured to identify boundary switches from all switches in the distribution network lines.
- Grid division module 1202 is configured to divide the distribution network lines according to the boundary switches to determine the load grid, branch grid, and mainline grid.
- Load mechanism determination module 1203 is configured to determine the two-stage overcurrent protection mechanism of the boundary switches in the load grid according to preset load grid rules.
- Branch protection duration determination module 1204 is configured to determine the branch protection operation duration of the boundary switches of the branch grid according to the first protection configuration information of the distribution network area corresponding to the branch grid.
- Branch mechanism determination module 1205 is configured to determine the two-stage overcurrent protection mechanism of the boundary switches of the branch grid according to the branch protection operation duration.
- Mainline protection duration determination module 1206 is configured to determine the mainline protection operation duration of the boundary switches of the mainline grid according to the second protection configuration information of the distribution network area corresponding to the mainline grid.
- Mainline mechanism determination module 1207 is configured to determine the directional longitudinal protection mechanism of the boundary switches of the mainline grid according to the mainline protection operation duration.
- the first protection configuration information is the protection mechanism information of the boundary switches in the distribution network area corresponding to the branch grid, whose protection mechanism has been determined;
- the second protection configuration information is the protection mechanism information of the boundary switches in the distribution network area corresponding to the main grid, whose protection mechanism has been determined.
- the device performs functions similar to those described above; other functions are described in the preceding descriptions and will not be repeated here.
- the electronic device 1300 shown in FIG13 includes a processor 1301 and a memory 1303.
- the processor 1301 and the memory 1303 are connected, for example, via a bus 1302.
- the electronic device 1300 may further include a transceiver 1304.
- the transceiver 1304 is not limited to one type, and the structure of this electronic device 1300 does not constitute a limitation on the embodiments of this application.
- Processor 1301 may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 1301 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.
- Bus 1302 may include a pathway for transmitting information between the aforementioned components.
- Bus 1302 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc.
- PCI Peripheral Component Interconnect
- EISA Extended Industry Standard Architecture
- Bus 1302 may be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used in Figure 13, but this does not indicate that there is only one bus or one type of bus.
- the memory 1303 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, a random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code having an instruction or data structure form and accessible by a computer.
- ROM read-only memory
- RAM random access memory
- EEPROM electrically erasable programmable read-only memory
- CD-ROM compact disc read-only memory
- CD-ROM compact disc read-only memory
- optical disc storage including compressed discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.
- the memory 1303 is used to store application code that executes the solution of this application, and its execution is controlled by the processor 1301.
- the processor 1301 is used to execute the application code stored in the memory 1303 to implement the content shown in the foregoing method embodiments.
- the electronic devices include mobile terminals such as mobile phones, laptops, digital radio receivers, personal digital assistants (PDAs), tablet computers (PADs), portable multimedia players (PMPs), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers, and can also be servers.
- PDAs personal digital assistants
- PADs tablet computers
- PMPs portable multimedia players
- in-vehicle terminals e.g., in-vehicle navigation terminals
- fixed terminals such as digital TVs and desktop computers
- Figure 13 shows an example of an electronic device.
- This application provides a computer-readable storage medium storing a computer program that, when run on a computer, enables the computer to execute the corresponding content described in the aforementioned method embodiments.
- the storage medium may be a read-only memory, a disk, or an optical disk, etc.
- the computer program product includes a computer program stored on a computer-readable storage medium.
- the computer program includes program instructions that, when executed by a computer, cause the computer to perform the corresponding content in the above method embodiments.
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
一种配电网网格化保护方法、装置、设备、介质及程序产品。该方法包括:从配电网线路的各个开关中确定出边界开关(S110);根据边界开关划分配电网线路,以确定出负荷网格、支线网格以及主线网格(S120);根据预设负荷网格规则确定负荷网格中的边界开关的两段过流保护机制(S130);根据支线网格所对应的配电网区域中的第一保护配置信息,确定支线网格的边界开关的支线保护动作时长(S140);根据支线保护动作时长,确定支线网格的边界开关的两段过流保护机制(S150);根据主线网格所对应的配电网区域中的第二保护配置信息,确定主线网格的边界开关的主线保护动作时长(S160);根据主线保护动作时长,确定主线网格的边界开关的方向纵联保护机制(S170)。
Description
本申请要求在2024年07月05日提交中国专利局、申请号为202410909759.5的中国专利申请的优先权,该申请的全部内容通过引用结合在本申请中。
本申请涉及电力系统继电保护的领域,例如涉及一种配电网网格化保护方法、装置、设备、介质及程序产品。
继电保护是对电力系统中发生的故障或异常情况进行检测,从而发出报警信号,或直接将故障部分隔离、切除的一种重要措施。因此,在配电网中的各级开关处配置相应的继电保护,以便于在配电网发生故障时各级开关可以及时断开,以将故障可靠隔离。
传统配电网为单电源辐射状网络。在为传统配电网配置相应继电保护的情况下,通常会对变电站出线开关、分支开关以及用户分界开关按照三级配合模式配置阶段式过流保护。也即通过在变电站出线开关、分支开关以及用户分界开关分别设置相应过流保护,并且各个开关的保护定值以及动作时间之间相互配合设置。各个开关在电流达到保护定值,且经历相应动作时间后,断开以切除故障。
但是,随着光伏发电的快速发展,大量的分布式电源也接入配电网,使得配电网由单电源辐射状网络转变为多电源网络。配电网转变为多电源网络后,改变了配电网原有的短路电流分布特征,使得原有的阶段式过流保护的效果较差。
例如分布式电源会使得配电网中的短路电流变大,使得开关越级动作,或者使得短路电流变小使得开关难以及时切除故障,或者产生反向的短路电流使得开关误动作。
现阶段为了解决多电源的配电网线路中继电保护的效果较差的问题,通常会在各个开关处安装保护装置,并且各个保护装置之间需要建立通信通道,以在各个开关处配置差动保护或者纵联保护等。
例如,每个开关所对应的保护装置需要采集保护区域内的所有支路的电流信息,以判断保护区域内是否出现短路。在支路出现短路的情况下,由该支路对应的开关及时切断故障,并且该支路的开关及时向上级开关反馈闭锁信号,例如向主干线上的开关反馈闭锁信号,以指示该支路对应的开关已断开,主干线上的开关响应该闭锁信号不再执行断开动作,仅由支路对应的开关断开以将故障区域切除;在主干线上的开关未收到闭锁信号的情况下,主干线上的开关断开,由主干线上的开关将故障区域切除。
但是相关技术中的方式需要建立各个保护装置之间的通信通道,以便于下级开关的保护装置可以向上级开关的保护装置传输通信信号,例如由分支线开关的保护装置向主干线开关的保护装置传输闭锁信号。
这种方式在配电网线路中增加新支线的情况下,需要对主干线上的保护重新进行配置整定,使得这种方式的拓扑适应能力较差。
本申请旨在提供一种配电网网格化保护方法、装置、设备、介质及程序产品。
根据本申请的一方面,提出一种配电网网格化保护方法,该方法包括:从配电网线路的各个开关中确定出边界开关。根据边界开关划分配电网线路,以确定出负荷网格、支线网格以及主线网格。根据预设负荷网格规则确定负荷网格中的边界开关的两段过流保护机制。根据支线网格所对应的配电网区域中的第一保护配置信息,确定支线网格的边界开关的支线保护动作时长。根据支线保护动作时长,确定支线网格的边界开关的两段过流保护机制。根据主线网格所对应的配电网区域中的第二保护配置信息,确定主线网格的边界开关的主线保护动作时长。根据主线保护动作时长,确定主线网格的边界开关的方向纵联保护机制。
第一保护配置信息为支线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息;第二保护配置信息为主线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息。
根据本申请的一方面,提出一种配电网网格化保护装置,该装置包括边界开关确定模块、网格划分模块、负荷机制确定模块、支线保护时长确定模块、支线机制确定模块、主线保护时长确定模块以及主线机制确定模块。
边界开关确定模块设置为从配电网线路的各个开关中确定出边界开关。
网格划分模块设置为根据边界开关划分配电网线路,以确定出负荷网格、支线网格以及主线网格。
负荷机制确定模块设置为根据预设负荷网格规则确定负荷网格中的边界开关的两段过流保护机制;支线保护时长确定模块设置为根据支线网格所对应的配电网区域中的第一保护配置信息,确定支线网格的边界开关的支线保护动作时长;支线机制确定模块设置为根据支线保护动作时长,确定支线网格的边界开关的两段过流保护机制;主线保护时长确定模块设置为根据主线网格所对应的配电网区域中的第二保护配置信息,确定主线网格的边界开关的主线保护动作时长;主线机制确定模块设置为根据主线保护动作时长,确定主线网格的边界开关的方向纵联保护机制。
第一保护配置信息为支线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息。第二保护配置信息为主线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息。
根据本申请的一方面,提出一种电子设备,该电子设备包括:一个或多个处理器;存储装置,用于存储一个或多个程序;当一个或多个程序被一个或多个处理器执行,使得一个或多个处理器实现如上文的方法。
根据本申请的一方面,提出一种计算机可读介质,其上存储有计算机程序,该程序被处理器执行时实现如上文中的方法。
根据本申请的一方面,提出一种计算机程序产品。该计算机程序产品包括存储在计算机可读存储介质上的计算机程序,该计算机程序包括程序指令,当该程序指令被计算机执行时,使该计算机执行如上文中的方法。
通过采用上述描述的配电网网格化保护方法,对配电网线路进行划分,划分为负荷网格、支线网格以及主线网格。并依次设置各个网格的边界开关对应的保护机制。对于支线网格,根据支线网格的配电网区域中的第一保护配置信息,确定支线网格的边界开关的支线保护动作时长;对于主线网格,根据主线网格的配电网区域中的第二保护配置信息确定主线网格的边界开关的主线保护动作时长。
这样不需要建立配电网线路中每个开关之间通信的通信通道,也无需在各个开关之间传递闭锁信号,而仅需要在主线网格边界开关处配置方向纵联保护,主线网格内增减支线原来的保护配置无需做任何修改,极大地提升了保护对配电网拓扑频繁变化的适应能力,同时主线网格边界开关之间仅需传递用于判断故障方向的开关量信号,对通信性能要求大幅降低。
图1为本申请实施例提供的配电网网格化保护方法的流程示意图;
图2为本申请实施例提供的一种配电网线路示例划分网格后的示例图;
图3是本申请实施例提供的步骤S110确定边界开关的流程示意图;
图4是本申请实施例提供的步骤S112确定支线边界开关的流程示意图;
图5是本申请实施例提供的步骤S120划分网格的流程示意图;
图6是本申请实施例提供的步骤S140确定支线保护动作时长的流程示意图;
图7是本申请实施例提供的配电网线路示例的各个网格各自对应的保护机制的示例图;
图8是本申请实施例提供的步骤S150确定支线网格的过流保护机制的流程示意图;
图9是本申请实施例提供的步骤S160确定主线保护动作时长的流程示意图;
图10是本申请实施例提供的确定变电站出线开关的保护机制的流程示意图;
图11是本申请实施例提供的步骤S180确定出线保护动作时长的流程示意图;
图12是本申请实施例提供的配电网网格化保护装置的方框示意图;
图13是本申请实施例提供的电子设备的示意图。
现在将参考附图更全面地描述示例实施例。然而,示例实施例能够以多种形式实施,且不应被理解为限于在此阐述的实施例;相反,提供这些实施例使得本申请将全面和完整,并将示例实施例的构思全面地传达给本领域的技术人员。在图中相同的附图标记表示相同或类似的部分,因而将省略对它们的重复描述。
所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中,提供许多具体细节从而给出对本公开的实施例的充分理解。然而,本领域技术人员将意识到,可以实践本公开的技术方案而没有这些特定细节中的一个或更多,或者可以采用其它的方式、组元、材料、装置等。在这些情况下,将不详细示出或描述公知结构、方法、装置、实现、材料或者操作。
此外,术语“包括”和“具有”以及它们任何变形,意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元,而是可选地还包括没有列出的步骤或单元,或可选地还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象,而不是用于描述特定顺序。
下面结合本申请实施例中的附图,对本申请的技术方案进行清楚、完整地描述,描述的实施例是本申请的一部分实施例,而不是全部实施例。基于本申请中的实施例,本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
本申请实施例一方面提供一种配电网网格化保护方法。参照图1,该配电网网格化保护方法由电子设备执行,该方法包括步骤S110、步骤S120、步骤S130、步骤S140、步骤S150、步骤S160以及步骤S170。
在步骤S110中,从配电网线路的各个开关中确定出边界开关。
根据示例实施例,配电网线路是电力系统中从输电网或地区发电厂接受电能后,通过配电设施就地分配或按电压逐级分配给各类用户的电力网。
配电网线路通常呈树形辐射状网络,如图2所示,电能从变电站母线输出,并通过主干线、支线以及末端负荷线路依次传输至用户。配电网线路中的主干线即相当于树干。树干可以连接树枝,树枝即相当于支线。树枝上可以连接其它小树枝,其它小树枝即可相当于末端负荷线路。
在配电网线路的主干线上、支线上以及末端负荷线路上通常设置有开关。例如图2所示,在配电网的主干线上一般设置有变电站出线开关、分段开关以及联络开关;在配电网的支线上一般设置有分支开关;在配电网的末端负荷线路上一般设置有用户分界开关。
变电站出线开关指位于变电站内的主干线首端的开关。分段开关用于将主干线分成若干个供电区域。联络开关为在电源出现故障的情况下,将线路负荷转移到其他电网电源上的开关。值得说明的是,联络开关正常运行情况下一般处于断开状态,在变电站出现故障的情况下,联络开关闭合,将线路负荷接入其它电网电源中。
本申请实施例中,在步骤S110中,电子设备从配电网线路上的各个开关中,确定出边界开关。具体可以由电子设备直接将变电站出线开关、分段开关、联络开关、分支开关以及用户分界开关等确定为边界开关;也可以从变电站出线开关、各个分段开关、各个联络开关、各个分支开关以及各个用户分界开关中筛选出边界开关。
示例性地,在步骤S110中,针对图2所示的配电网线路,电子设备可以将变电站出线开关、分段开关1、联络开关、用户分界开关1、分支开关2、用户分界开关2、用户分界开关3、用户分界开关4、分支开关3、用户分界开关5以及用户分界开关6分别确定为边界开关。
在步骤S120中,根据边界开关划分配电网线路,以确定出负荷网格、支线网格以及主线网格。
根据示例实施例,在步骤S120中,电子设备可以根据选定的边界开关,划分配电网线路,以将配电网线路划分为各个负荷网格、支线网格以及主线网格。
根据示例实施例,在步骤S120中,负荷网格为与负荷最接近的边界开关以及该边界开关的下游区域所对应的配电网区域。下游区域为根据电网电源的电流流向而确定的区域。示例性地,图2中的用户分界开关1为与负荷1最接近的边界开关,电网电源中的电流由用户分界开关1流向负荷1,该用户分界开关1的下游区域即包括用户分界开关所连接的所有负荷以及线路都包含在内的区域。
根据示例实施例,在步骤S120中,支线网格包括支线边界开关以及该边界开关的下游区域所对应的配电网区域。支线边界开关用于控制支线与主干线之间的连接通断。示例性地,图2中的分支开关2用于控制支线是否与主干线连接,为支线边界开关。该分支开关2以及分支开关2的下游区域划分为一个支线网格。
根据示例实施例,在步骤S120中,支线网格还包括与分布式电源最接近的边界开关以及该边界开关的下游区域所对应的配电网线路。例如图2所示的用户分界开关6,与分布式电源相连接,该用户分界开关6与该分布式电源之间的线路被电子设备划分为一个支线网格。
根据示例实施例,在步骤S120中,主线网格为两个相邻主干线边界开关之间所对应的配电网区域。主干线边界开关为位于主干线上的边界开关。例如图2所示,电子设备将变电站出线开关与分段开关1之间划分为一个主线网格,将分段开关1与联络开关之间划分为一个主线网格。
在步骤S130中,根据预设负荷网格规则确定负荷网格中的边界开关的两段过流保护机制。
根据示例实施例,针对负荷网格,可以对负荷网格中的边界开关配置两段式过流保护。两段式过流保护包括I段过流保护以及II段过流保护。
根据示例实施例,预设负荷网格规则为预先设定的保护配置规则,具体包括设置负荷网格的I段过流保护为无延时的过流保护,设置负荷网格的II段过流保护的二段负荷动作时长为预设负荷延时时长。
其中,I段过流保护用于在负荷网格中出现短路等故障的情况,无延时地切断故障;II段过流保护用于在负荷网格中出现异常扰动的情况下延时断开,对于在二段负荷动作时长内异常扰动可以自行消失的情况下,II段过流保护对应的过流保护装置不动作,使得负荷可以继续正常运行。
根据示例实施例,在步骤S130中,对于负荷网格,电子设备可以直接根据预设负荷网格规则,确定每个负荷网格的两段过流保护机制。两段过流保护机制包括I段过流保护的一段负荷动作时长,以及II段过流保护的二段负荷动作时长。值得说明的是,负荷网格的一段负荷动作时长为0,二段负荷动作时长为预设负荷延时时长。
之后,电子设备可以将该负荷网格的两段过流保护机制反馈至工作人员,由工作人员为各个负荷网格的边界开关配置对应的继电保护。
在步骤S140中,根据支线网格所对应的配电网区域中的第一保护配置信息,确定支线网格的边界开关的支线保护动作时长。
其中,第一保护配置信息为支线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息。
示例性地,对于分支开关2所对应的支线网格,该支线网格中包含用户分界开关2对应的负荷网格、用户分界开关3对应的负荷网格以及用户分界开关4对应的负荷网格。用户分界开关2、用户分界开关3以及用户分界开关4的保护机制已经由电子设备在步骤S130中确定。
也即,该分支开关2对应的第一保护配置信息包括用户分界开关2的一段负荷动作时长和二段负荷动作时长,用户分界开关3的一段负荷动作时长和二段负荷动作时长,用户分界开关4的一段负荷动作时长和二段负荷动作时长。
对于支线网格中不存在负荷网格的情况,该支线网格对应的第一保护配置信息为空集。
在步骤S150中,根据支线保护动作时长,确定支线网格的边界开关的两段过流保护机制。
根据示例实施例,负荷网格按照上述步骤S130的方式确定了相应的保护机制。在步骤S140中,电子设备可以根据第一保护配置信息确定支线网格的边界开关的支线保护动作时长;以在步骤S150中,电子设备可以根据该支线保护动作时长,确定支线网格的边界开关的保护机制。
根据示例实施例,支线网格的边界开关配置两段过流保护。支线保护动作时长对应包括一段支线动作时长以及二段支线动作时长。支线网格的边界开关在电流达到I段过流保护的整定值的情况下,经过一段支线动作时长后,执行断开动作。支线网格的边界开关在电流达到II段过流保护的整定值的情况下,经过二段支线动作时长后执行断开动作。
为了减小故障时的停电范围,并且保证故障时可以可靠切除故障,在支线网格中出现故障的情况下,支线网格的边界开关需要在负荷网格的边界开关或者下级其他开关未及时断开切除故障的情况下,可以及时断开,以切除故障点。
因此,在本申请实施例中,该一段支线动作时长以及二段支线动作时长可以根据支线网格内的第一保护配置信息而确定。例如,参照图2,对于分支开关2,电子设备在步骤S130中可以设置分支开关2的一段支线动作时长大于下级各个边界开关的一段负荷动作时长,二段支线动作时长大于下级各个边界开关的二段负荷动作时长。
这样可以在用户分界开关2对应的负荷网格内发生故障的情况下,在支线保护动作时长内,可以先由用户分界开关2的两段过流保护装置切除故障;在达到支线保护动作时长后用户分界开关2仍未及时切除故障的情况下,分支开关2可以自行动作以可靠切除故障。
在步骤S160中,根据主线网格所对应的配电网区域中的第二保护配置信息,确定主线网格的边界开关的主线保护动作时长。
第二保护配置信息为主线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息。
电子设备在上述步骤S130、步骤S140、步骤S150中,分别确定了负荷网格的边界开关以及支线网格的边界开关所对应的保护机制。也即,对于主线网格所对应的第二保护配置信息即包括配电网区域中的各个负荷网格的边界开关的负荷保护动作时长以及各个支线网格的边界开关的支线保护动作时长。
示例性地,参照图2,对于变电站出线开关与分段开关1之间的主线网格,该主线网格所对应的配电网区域中,包含用户分界开关1对应的负荷网格。因此,该主线网格对应的第一保护配置信息包括用户分界开关1的一段保护动作时长和二段保护动作时长。
对于主线网格中不存在负荷网格也不存在支线网格的情况,该主线网格对应的第二保护配置信息为空集。
在步骤S170中,根据主线保护动作时长,确定主线网格的边界开关的方向纵联保护机制。
根据示例实施例,在步骤S160中,电子设备可以根据各个负荷网格的边界开关以及支线网格的边界开关所设置的保护机制,确定各个主线网格的主线保护动作时长。以在步骤S170中,电子设备可以根据该主线保护动作时长,确定主线网格的边界开关的方向纵联保护机制。
根据示例实施例,方向纵联保护是当线路发生故障时,使两侧开关同时快速跳闸的一种保护装置。它以线路两侧判别量的特定关系作为判据。即两侧均将判别量借助通道传送到对侧,然后,两侧分别按照对侧与本侧判别量之间的关系来判别区内故障或区外故障。
对于主线网格内存在负荷网格和/或支线网格等下级网格的情况,在主线网格的两个边界开关判断出为区内故障的情况下,可以先由主线网格内的下级边界开关将故障切除。在下级边界开关未及时切除故障的情况下,再由主线网格的两个边界开关断开,以切除整个区域,其中,主线网格内的下级边界开关指下级网格的边界开关。
因此,为了有利于减小故障停电范围,在本申请实施例中,主线网格的边界开关的主线动作时长根据主线网格内的下级边界开关的保护动作时长而确定,从而通过利用边界开关之间的保护动作时长的配合,实现优先由下级边界开关切除故障的方案。
例如,参照图2,对于变电站出线开关以及分段开关1之间的主线网格,在该主线网格中仅存在用户分界开关1对应的负荷网格的情况下,在步骤S160中,电子设备可以设置该变电站出线开关与分段开关1的方向纵联保护的主线保护动作时长,使得该主线保护动作时长大于用户分界开关1的一段负荷动作时长。
示例性地,在用户分界开关1对应的负荷网格内出现故障的情况下,在主线保护动作时长内,由用户分界开关1切除故障,用户分接开关1动作后,故障便与其他网格隔离,变电站出线开关、分段开关1的允许信号随即返回,该主线网格保护不会动作。对于在主线保护动作时长内用户分界开关1未动作,也即用户分界开关1未及时切除故障的情况,故障时长达到变电站出线开关以及分段开关1设置的方向纵联保护装置的主线保护动作时长,由变电站出线开关以及分段开关1将用户分界开关1对应的负荷网格中的故障切除,从而使得用户分界开关1对应的负荷网格的故障不会对配电网线路中的其他主线网格中的设备产生影响,也不会对变电站产生影响。
而在相关技术中,为了减小故障时的停电范围,并且保证故障时可以可靠切除故障,支线网格的边界开关需要与主线网格的边界开关相互通信,向主线网格发送闭锁信号。
但是本申请实施例中,仅需要配合设置主线网格的边界开关的主线保护动作时长与下级各个边界开关的保护动作时长(例如,在主线网格包含支线网格和负荷网格的情况下,该下级各个边界开关的保护动作时长包括支线网格的边界开关的支线保护动作时长以及负荷网格的边界开关的负荷保护动作时长),以自动在下级线路出现故障且下级的边界开关未及时切除故障的情况下,由主线网格的边界开关自动切除故障,不需要建立各个开关之间的通信,也无需在各个开关之间传递闭锁信号。
根据一些实施例,方向纵联保护可以采用允许式的方向纵联保护。具体地,在步骤S170中确定主线网格的方向纵联保护机制还包括:确定主线网格的信号发送机制以及主线网格的动作机制,根据主线网格的信号发送机制以及主线网格的动作机制,确定主线网格的方向纵联保护机制。
根据示例实施例,电子设备可以将预设信号发送机制确定为该主线网格的信号发送机制。该预设信号发送机制包括:在主线网格的边界开关满足有流判据并且故障方向指向本主线网格的情况下,向本主线网格中的每个边界开关发送第一允许信号;在主线网格的边界开关不满足有流判据的情况下,向本主线网格中的每个边界开关发送第二允许信号;在主线网格的边界开关满足有流判断并且故障方向不指向本主线网格的情况下,不发送允许信号,该允许信号包括第一允许信号以及第二允许信号。
根据示例实施例,当流经该主线网格的边界开关的电流达到预设值时,即表征该主线网格的边界开关满足有流判据。
示例性地,在工作人员根据该主线网格的边界开关的信号发送机制,在主线网格的边界开关上配置方向纵联保护后,对于变电站出线开关与分段开关1所对应的主线网格,变电站出线开关对应的保护装置实时判断该变电站出线开关是否满足有流判据,以及判断故障方向是否指向本网格。分段开关1对应的保护装置也实时判断。在变电站出线开关对应的保护装置判断出边界开关满足有流判据,并且故障方向指向本主线网格的情况下,该保护装置向分段开关1发送第一允许信号;在变电站出线开关对应的保护装置判断出该边界开关有流判据不满足的情况下,向分段开关1发送第二允许信号;在变电站出线开关对应的保护装置判断出该边界开关有流判断满足并且故障方向未指向本网格的情况下,既不发出第一允许信号也不发出第二允许信号。
根据示例实施例,电子设备可以将预设动作机制确定为该主线网格的边界开关的动作机制。该预设动作机制包括主线网格的边界开关判断是否满足第一预设动作出口条件,以及判断是否满足第二预设动作出口条件;在满足第一预设动作出口条件或者满足第二预设动作出口条件的情况下,方向纵联保护装置动作,也即该主线网格的边界开关断开以切除故障。
该第一预设动作出口条件包括该边界开关的保护启动元件满足启动条件;且该边界开关发出第一允许信号;且接收到该主线网格中其它所有边界开关发送的允许信号;且故障时长达到该边界开关对应的主线保护动作时长。值得说明的是,在接收到任一边界开关发送的第一允许信号或者接收到该任一边界开关发送的第二允许信号的情况下,即表征接收到该任一边界开关发送的允许信号。
第二预设动作出口条件包括该边界开关的保护启动元件满足启动条件;且该边界开关发出第二允许信号;且接收到该主线网格中其它所有边界开关发送的允许信号;且所接收到的允许信号中至少存在一个第一允许信号;且故障时长达到该边界开关对应的主线保护动作时长。
方向纵联保护的启动元件具体可以包括过电流启动元件和/或低电压启动元件。
对于配置方向纵联保护的边界开关对应的启动元件既包括过电流启动元件又包括低电压启动元件的情况,在过电流启动元件满足预设电流启动元件和/或低电压启动元件满足预设电压启动元件的情况下,即表征该边界开关的保护启动元件满足启动条件。
通过采用上述描述的配电网网格化保护方法,对配电网线路进行划分,划分为负荷网格、支线网格以及主线网格。并依次设置各个网格的边界开关对应的保护机制。对于支线网格,根据支线网格的配电网区域中的第一保护配置信息,确定支线网格的边界开关的支线保护动作时长;对于主线网格,根据主线网格的配电网区域中的第二保护配置信息确定主线网格的边界开关的主线保护动作时长。
这样不需要建立配电网线路中每个开关之间通信的通信通道,也无需在各个开关之间传递闭锁信号,而仅需要在主线网格边界开关处配置方向纵联保护,传递用于判断故障方向的开关量信号,对通信性能要求低。
本申请实施例也不需要通过在各个边界开关之间传递闭锁信号或者电流信息,而仅通过各个网格之间的边界开关的保护动作时长相互配合,即可使得在线路发生故障的情况下,由故障线路所属的网格的边界开关,按照负荷网格、支线网格、主线网格的顺序,依次切除故障。
因此,对于本申请实施例的技术方案,在主线网格增加支路或者减少支路的情况下,各个已经确定保护机制的边界开关,无需重新配置整定,仅需要对增减的分支的保护进行配置整定,拓扑适应能力强。
另外,本申请实施例通过将配电网线路划分为主线网格、支线网格以及负荷网格,在线路故障的情况下,仅需隔离故障网格,使得故障隔离范围小。
并且,本申请实施例中,无论配电网线路多长或者多短,在配电网线路中均仅划分主线网格、支线网格和负荷网格三级,使得各个网格的边界开关的保护动作时长的配合级数限制为不高于三级,从而有利于缩短故障的切除时长。
根据一些实施例,参照图3,在上述步骤S110中,从配电网线路的各个开关中确定出边界开关,具体可以包括步骤S111、步骤S112以及步骤S113。
在步骤S111中,根据配电网线路的主干线上的主干线开关,确定出主线边界开关。
根据示例实施例,边界开关按照开关的设置位置不同可以分为主线边界开关、支线边界开关以及负荷边界开关。电子设备可以沿着主干线、各个支线以及末端负荷线依次确定边界开关。对于在主干线上确定出的开关即为主线边界开关,对于在支线上确定出的开关即为支线边界开关,对于在负荷边界开关上确定出的开关即为负荷边界开关。
根据示例实施例,配电网线路的主干线上的主干线开关具体可以包括变电站出线开关、分段开关以及联络开关。如图2所示。
根据一些实施例,在步骤S111中,电子设备可以将每个主干线开关确定为边界开关。
根据一些实施例,在步骤S111中,电子设备确定主线边界开关还可以包括以变电站出线开关为始,沿配电网线路的主干线,从各个主干线开关中依次将满足预设阈值条件的主干线开关确定为主线边界开关。
其中,预设阈值条件为相邻的两个主线边界开关之间的配电线路段所带的总负荷容量超出预设负荷容量值,或者配电线路段中所连接的支线数不低于预设支线数量。
示例性地,在主干线上沿电流的流向,依次设置有变电站出线开关、分段开关1、分段开关2、分段开关3……分段开关n。从变电站出线开关为始,电子设备将变电站出线开关确定为主线边界开关。之后电子设备根据当前边界开关,判断分段开关1与当前边界开关是否满足预设阈值条件,也即判断变电站出线开关与分段开关1之间的总负荷容量是否超出预设负荷容量值,以及判断变电站出线开关与分段开关1之间的配电线路段中所连接的支线数是否不低于预设支线数量。在当前边界开关与分段开关1不满足预设阈值条件的情况下,电子设备判断当前边界开关与分段开关2之间是否满足预设阈值条件,也即判断变电站出线开关与分段开关2之间是否满足预设阈值条件。
在变电站出线开关与分段开关2之间满足预设阈值条件的情况下,将分段开关2设置为主线边界开关。之后电子设备判断分段开关3与当前边界开关(也即分段开关2)之间是否满足预设阈值条件,以此类推。直至电子设备在判断分段开关n与当前边界开关之间是否满足预设阈值条件的情况下,无论分段开关n与当前边界开关之间是否满足预设阈值条件,直接将分段开关n确定为主线边界开关。
在步骤S112中,根据配电网线路的支线上的分支开关,以及与分布式电源相连接的分界开关,确定出支线边界开关。
分支开关为控制支线与主干线之间的连接的开关。
根据示例实施例,在步骤S112中,电子设备可以将配电网线路的支线上的各个分支开关确定为支线边界开关,以及将与分布式电源相连接的分界开关,确定为支线边界开关。
示例性地,如图2所示的配电网线路中,电子设备可以将用户分界开关6确定为支线边界开关,以及将分支开关1、分支开关2以及分支开关3确定为支线边界开关。
根据一些实施例,参照图4,在步骤S112中,电子设备确定支线边界开关还可以包括步骤S1121以及步骤S1122。
在步骤S1121中,从各个支线中确定出目标支线。
根据示例实施例,目标支线为各个支线中与变电站母线之间的主干线段上存在至少两个主干线开关的支线。例如图2所示的分支开关1所对应的支线,该支线与变电站母线之间的主干线上仅存在一个变电站出线开关,该分支开关1所对应的支线不属于目标支线。对于分支开关2以及分支开关3所对应的支线,均属于目标支线。
在步骤S1122中,将目标支线中的分支开关以及与分布式电源相连接的分界开关,确定为支线边界开关。
根据示例实施例,电子设备在步骤S1121中确定出目标支线,之后电子设备即可在步骤S1122中,将各个目标支线对应的分支开关确定为支线边界开关,以及将与分布式电源相连接的分界开关确定为支线边界开关。
这样可以使得在与变电站最靠近的支线的分支开关不设置相应的保护,从而可以使得变电站出线开关的保护动作时长变短,从而使得在与变电站最靠近的配电线路发生故障的情况下,可以由变电站出线开关及时切除故障,减小短路电流对变电站内的变压器的冲击几率。
在步骤S113中,根据配电网线路中与负荷相连接的各个负荷开关,确定出负荷边界开关。
根据示例实施例,电子设备在步骤S111以及步骤S112中确定出了支线上的边界开关以及主线上的边界开关。对于与负荷相连接的开关,也即对于末端负荷线路中的用户分界开关,电子设备在步骤S113中,可以将各个用户分界开关均确定为负荷边界开关。
根据一些实施例,对于配电网线路的拓扑结构比较复杂的支线,也可以将若干条末端负荷线路合并,以将若干条末端负荷线路的上游公共分支开关确定为负荷边界开关。例如:在支线a上连接有小支线a1,小支线a1上连接有若干条末端负荷线路,且小支线a1首端配置有分支开关a1,分支开关a1即为若干条末端负荷线路的上游公共分支开关,因此在步骤S113中,电子设备可以将分支开关a1作为这些末端负荷线路的负荷边界开关。
根据一些实施例,参照图5,在上述步骤S120中,根据边界开关划分配电网线路,以确定出负荷网格、支线网格以及主线网格,具体可以包括步骤S121、步骤S122、步骤S123、步骤S124、步骤S125以及步骤S126。
在步骤S121中,从边界开关中,确定出第一边界开关。
根据示例实施例,第一边界开关为下游配电网区域中无其他边界开关,且,下游配电网区域中无大容量分布式电源的边界开关。示例性地,参照图2,图2所示的配电网线路中,对于用户分界开关1、用户分界关2、用户分界开关3、用户分界开关4以及用户分界开关5各自对应的下游配电网区域中不存在其它边界开关,也不存在大容量分布式电源,因此,该用户分界开关1、用户分界关2、用户分界开关3、用户分界开关4以及用户分界开关5为第一边界开关。
根据示例实施例,在步骤S121中,电子设备可以确定出第一边界开关,之后电子设备即可根据第一边界开关确定负荷网格。
在步骤S122中,将第一边界开关及第一边界开关的下游配电网区域划分为负荷网格。
示例性地,如图2所示,在步骤S122中,电子设备可以将用户分界开关1以及用户分界开关1的下游配电网区域划分为负荷网格1,将用户分界关2以及用户分界开关2的下游配电网区域划分为负荷网格2,将用户分界开关3以及用户分界开关3的下游配电网区域划分为负荷网格3,将用户分界开关4以及用户分界开关4的下游配电网区域划分为负荷网格4,将用户分界开关5以及用户分界开关5的下游配电网区域划分为负荷网格5。
在步骤S123中,从边界开关中,确定出第二边界开关,第二边界开关为满足预设划分条件的边界开关。
在步骤S124中,将第二边界开关及第二边界开关的下游配电网区域划分为支线网格。
根据示例实施例,在步骤S123中,预设划分条件包括第一预设划分条件以及第二预设划分条件。第一预设划分条件为边界开关位于配电网线路中的非主干线上,且边界开关的下游配电网区域中存在负荷网格。
第二预设划分条件为边界开关位于配电网线路中的非主干线上,且边界开关的下游配电网区域中存在大容量分布式电源。
根据示例实施例,在步骤S123中,电子设备可以确定出位于非主干线上的各个边界开关,之后从非主干线上的各个边界开关中,筛选出下游配电网区域中存在负荷网格或者存在大容量分布式电源的边界开关,以确定出第二边界开关。
示例性地,如图2所示,分支开关2、分支开关3、用户分界开关1、用户分界开关2、用户分界开关3、用户分界开关4、用户分界开关5以及用户分界开关6,均位于配电网线路的非主干线上。分支开关2与分支开关3下游配电网区域中存在负荷网格,用户分界开关6下游配电网区域中存在大容量分布式电源。
因此,在步骤S123中,电子设备将分支开关2、分支开关3以及用户分界开关6确定为第二边界开关。
根据示例实施例,在步骤S124中,电子设备将第二边界开关以及第二边界开关的下游配电网区域确定为支线网格。
在步骤S125中,从边界开关中,确定出第三边界开关。
根据示例实施例,第三边界开关为位于主干线上的边界开关。例如图2所示的变电站出线开关、分段开关1以及联络开关。电子设备在步骤S125中,将位于主干线上的边界开关确定为第三边界开关。
在步骤S126中,将配电网中位于相邻两个第三边界开关之间的配电网区域,划分为主线网格。
根据示例实施例,在步骤S126中,电子设备将相邻两个第二边界开关之间的配电网区域,划分为一个主线网格。示例性地,如图2所示,将变电站出线开关与分段开关1之间的配电网区域划分为一个主线网格,将分段开关1与联络开关之间的配电网区域划分为一个主线网格。
基于上述实施例,电子设备在步骤S120中,根据边界开关,划分负荷网格、支线网格以及主线网格后,即可设置各个网格各自对应的边界开关的保护机制。
根据一些实施例,对于支线网格,参照图6,在步骤S140中,根据支线网格所对应的配电网区域中的第一保护配置信息,确定支线边界开关的支线保护动作时长,包括步骤S141、步骤S142a以及步骤S142b。
在步骤S141中,判断支线网格中是否存在支线下级网格。
根据示例实施例,支线下级网格为支线网格所对应的配电网区域所包含的其他网格。
示例性地,如图2以及图7所示,对于分支开关2所对应的支线网格,支线网格所对应的配电网区域中包含用户分界开关2对应的负荷网格、用户分界开关3对应的负荷网格以及用户分界开关4对应的负荷网格,因此该分支开关2所对应的支线网格的支线下级网格包括用户分界开关2对应的负荷网格、用户分界开关3对应的负荷网格以及用户分界开关4对应的负荷网格。
根据一些实施例,在步骤S141中,电子设备可以直接根据划分好网格后的配电网线路自动识别支线网格中是否存在支线下级网格,也可以根据第一保护配置信息判断支线网格中是否存在支线下级网格。例如,在第一保护配置信息为空集的情况下,即表征支线网格中不存在支线下级网格;在第一保护配置信息不为空集的情况下,即表征支线网格中存在支线下级网格。
在步骤S141中,电子设备判断出支线网格中不存在支线下级网格的情况下,电子设备确定支线网格的边界开关的一段支线动作时长以及二段支线动作时长具体可以包括步骤S142a。
在步骤S142a中,将第一预设时长确定为一段支线动作时长;以及将第二预设时长确定为二段支线动作时长。
根据示例实施例,第二预设时长大于第一预设时长,且第二预设时长与第一预设时长的差值为第一预设延时时长。
根据示例实施例,该第一预设时长具体可以为0s。该第一预设延时时长具体可以为0.1s~0.6s中的任意值,该第一预设延时时长的值可以根据用户需要自行设置。
根据示例实施例,在步骤S142a中,在支线网格中不存在支线下级网格的情况下,例如图2以及图7所示的用户分界开关6所对应的支线网格,该支线网格对应的边界开关的保护机制不需要与下属的其它边界开关做配合,因此,电子设备可以直接设定一段支线动作时长为0s,二段支线动作时长的值等于第一预设延时时长,例如为0.2s。
在步骤S141中,电子设备判断出支线网格中存在支线下级网格的情况下,电子设备确定支线网格的边界开关的一段支线动作时长以及二段支线动作时长具体可以包括步骤S142b。
在步骤S142b中,根据第一保护配置信息,确定一段最大下级动作时长以及二段最大下级动作时长;以及在一段最大下级动作时长的基础上叠加第二预设延时时长,以得到一段支线动作时长;以及在二段最大下级动作时长的基础上叠加第三预设延时时长,以得到二段支线动作时长。
根据示例实施例,在支线网格中存在支线下级网格的情况下,例如图2以及图7所示的分支开关2或者分支开关3所对应的支线网格,该支线网格对应的边界开关的保护机制需要与支线下级网格的边界开关做配合。
根据示例实施例,一段最大下级动作时长为支线下级网格对应的一段动作时长中最大的时长,二段最大下级动作时长为支线下级网格对应的二段动作时长中最大的时长。示例性地,参照图2和图7,分支开关3所对应的支线网格中,支线下级网格包括用户分界开关5对应的负荷网格,以及分布式电源对应的支线网格,一段最大下级动作时长为用户分界开关5的一段负荷动作时长与用户分界开关6的一段支线动作时长中的最大值;二段最大下级动作时长为用户分界开关5的二段支线动作时长与用户分界开关6的二段支线动作时长中的最大值。
根据示例实施例,在步骤S142b中,电子设备在一段最大下级时长的基础上叠加第二预设延时时长,即可得到一段支线动作时长。电子设备在二段最大下级时长的基础上叠加第三预设延时时长,即可得到二段支线动作时长。
电子设备根据步骤S141、步骤S142a以及步骤S142b可以确定出支线网格的边界开关的支线保护动作时长。之后电子设备即可在步骤S150中,根据支线保护动作时长,确定支线网格的边界开关配置两段过流保护机制。参照图8,该步骤S150具体可以包括步骤S151、步骤S152a以及步骤S152b。
在步骤S151中,判断支线网格所对应的配电网区域中是否存在大容量分布式电源。
根据一些实施例,在步骤S151中,电子设备判断是否存在大容量分布式电源的方式具体可以包括:判断上游最小短路电流是否小于下游最大短路电流。上游最小短路电流为该边界开关的下游区域发生故障时,该边界开关的上游区域中所有电源所提供的最小短路电流。下游最大短路电流为该边界开关的上游区域故障时,该边界开关的下游区域的所有分布式电源提供的最大短路电流。
电子设备在判断出在上游最小短路电流小于下游最大短路电流的情况下,即可确定该边界开关下游存在大容量分布式电源。
在支线网格所对应的配电网区域中存在大容量分布式电源的情况下,电子设备确定该支线网格对应的边界开关的保护机制的方式包括步骤S152a。
在步骤S152a中,在支线网格所对应的配电网区域中存在大容量分布式电源的情况下,根据支线保护动作时长,确定支线网格的边界开关的两段方向过流保护机制。
在支线网格所对应的配电网区域中不存在大容量分布式电源的情况下,电子设备确定该支线网格对应的边界开关的保护机制的方式包括步骤S152b。
在步骤S152b中,在支线网格所对应的配电网区域中不存在大容量分布式电源的情况下,根据支线保护动作时长,确定支线网格的边界开关的两段过流保护机制。
通过电子设备执行步骤S151、步骤S152a以及步骤S152b,可以使得在支线网格的配电网区域中存在大容量分布式电源的情况下,能够在支线网格的边界开关处配置两段式方向过流保护,以避免大容量分布式电源在短路故障的情况下引起的保护误动作的问题。
根据一些实施例,参照图9,在步骤S160中,电子设备根据主线网格所对应的配电网区域中的第二保护配置信息,确定主线网格的边界开关的主线保护动作时长,可以包括步骤S161、步骤S162a以及步骤S162b。
在步骤S161中,判断主线网格所对应的配电网区域中是否存在主线下级网格。
根据示例实施例,主线下级网格包括负荷网格以及支线网格。
根据示例实施例,在步骤S161中,电子设备判断主线网格所对应的配电网区域中是否存在负荷网格,以及是否存在支线网格。
在主线网格不存在负荷网格也不存在支线网格的情况下,主线网格的边界开关的保护机制可以不与其他边界开关相配合。因此,在这种情况下,电子设备可以确定该主线网格的主线动作时长的方式具体可以包括步骤S162a。
在步骤S162a中,确定主线网格的边界开关的主线动作时长为0。也即,电子设备确定主线动作时长为0,也即在该主线网格的边界开关配置无延时的方向纵联保护。
在主线网格中存在负荷网格和/或存在支线网格的情况下,主线网格的边界开关的保护机制需要与主线下级网格相配合。因此,在这种情况下,电子设备可以确定该主线网格的主线动作时长具体可以包括步骤S162b。
在步骤S162b中,根据第二保护配置信息,从主线下级网格各自对应的保护动作时长中,确定出一段最大动作时长;以及在一段最大动作时长的基础上叠加第四预设延时时长,以得到主线网格的边界开关的主线保护动作时长。
示例性地,参照图2以及图7,对于主线网格1(变电站出线开关与分段开关1之间的主线网格),主线网格1存在主线下级网格,该主线下级网格为用户分界开关1对应的负荷网格。电子设备将用户分界开关1对应的一段负荷动作时长,确定为一段最大动作时长。该用户分界开关1对应的一段负荷动作时长为0,因此该一段最大动作时长为0。
在一段最大动作时长的基础上叠加第四预设延时时长,即可得到主线网格的边界开关的主线保护动作时长。示例性地,第四预设延时时长为0.3s,则该变电站出线开关与分段开关1之间的主线网格所对应的主线保护动作时长为0+0.3=03s。
再例如,参照图2以及图7对于分段开关1与联络开关之间的主线网格,该主线网格的主线下级网格中,一段最大动作时长为分支开关2或者分支开关3的一段支线动作时长。分支开关2与分支开关3的一段支线动作时长按照上述实施例中的方式确定,均为第二预设延时时长。该主线网格的主线保护动作时长为第二预设延时时长+第四预设延时时长。
根据一些实施例,对于主线网格的边界开关,设置方向纵联保护作为主保护。本申请实施例中,对于变电站出线开关,还在变电站出线开关配置两段式过流保护作为后备保护。
该两段式过流保护的出线保护动作时长,需要与变电站出线开关的各个下游网格的保护动作时长做配合,以在发生故障且其他下游网格均未动作的情况下,由变电站出线开关动作切除故障。
根据一些实施例,参照图10,该方法还可以包括步骤S180以及步骤S190。
在步骤S180中,根据配电网线路中的各个边界开关的保护动作时长,确定配电网线路中的变电站出线开关的出线保护动作时长。
根据示例实施例,变电站出线开关位于变电站的出口,该变电站出线开关所连接的整个配电网线路均为该变电站出线开关的下游区域。该配电网线路中的各个主线网格、支线网格以及负荷网格均为该变电站出线开关的下游网格。
各个下游网格的边界开关的保护动作时长即为该配电网线路中的各个边界开关的保护动作时长。
电子设备可以根据各个边界开关的保护动作时长,确定变电站出线开关的出线保护动作时长,以配合设置配电网中的各个边界开关的保护机制。
在步骤S190中,根据出线保护动作时长,确定变电站出线开关的两段过流保护机制。
根据示例实施例,在步骤S190中,电子设备根据该出线保护动作时长,可以确定变电站出线开关的两段过流保护机制,以在变电站出线开关上配置两段式过流保护做为后备保护。
根据一些实施例,出线保护动作时长包括一段出线保护时长以及二段出线保护时长。一段出线保护时长为变电站出线开关的过流保护I段对应的保护动作时长。二段出线保护时长为变电站出线开关的过流保护II段对应的保护动作时长。
参照图11,在步骤S180中,根据配电网线路中的各个边界开关的保护动作时长,确定配电网线路中的变电站出线开关的出线保护动作时长,具体可以包括步骤S181、步骤S182以及步骤S183。
在步骤S181中,将一段支线动作时长、一段负荷动作时长以及主线保护动作时长中最大的时长,确定为最大一段时长。
根据示例实施例,在步骤S181中,电子设备从各个负荷网格的一段负荷动作时长、各个支线网格的一段支线动作时长以及各个主线网格的主线保护动作时长中,确定出最大的时长,该最大的时长即为最大一段时长;
示例性地,如图2以及图7所示的配电网线路中,各个负荷网格的一段负荷动作时长、各个支线网格的一段支线动作时长,以及各个主线网格的主线保护动作时长中,最大的时长为分段开关1与联络开关的主线保护动作时长。
在步骤S182中,在最大一段时长的基础上,叠加第五预设延时时长,以确定变电站出线开关的一段出线保护时长。
在步骤S183中,在一段出线保护时长的基础上,叠加第六预设延时时长,以确定变电站出线开关的二段出线保护时长。
示例性地,在如图2以及图7所示的配电网线路中,最大一段时长为分段开关1与联络开关的主线保护动作时长。在步骤S182中,电子设备在该分段开关1与联络开关的主线保护动作时长叠加第五预设延时时长,以确定出变电站出线开关的一段出线保护时长。之后在步骤S183中,电子设备在一段出线保护时长的基础上,再叠加第六预设延时时长,以确定出变电站出线开关的二段出线保护时长。
例如,参照图7,在第一预设延时时长、第二预设延时时长、第三预设延时时长、第四预设延时时长、第五预设延时时长以及第六预设延时时长均为T的情况下,该分段开关1与联络开关的主线保护动作时长为2T,该一段出线保护时长为3T,该二段出线保护时长为4T。
本领域技术人员可以理解实现上述实施例的全部或部分步骤被实现为由CPU执行的计算机程序。在该计算机程序被CPU执行时,执行本申请提供的上述方法所限定的上述功能。
上述实施例从方法流程的角度介绍一种配电网网格化保护配置的方法,下述实施例从虚拟模块或者虚拟单元的角度介绍了一种配电网网格化保护的装置,具体详见下述实施例。
下面描述的本申请的装置实施例,其可以用于执行本申请方法实施例。对于本申请装置实施例中未披露的细节,可参照本申请方法实施例。
如图12所示,一种配电网网格化保护装置,装置包括:边界开关确定模块1201、网格划分模块1202、负荷机制确定模块1203、支线保护时长确定模块1204、支线机制确定模块1205、主线保护时长确定模块1206以及主线机制确定模块1207。
边界开关确定模块1201设置为从配电网线路的各个开关中确定出边界开关。网格划分模块1202设置为根据边界开关划分配电网线路,以确定出负荷网格、支线网格以及主线网格。负荷机制确定模块1203设置为根据预设负荷网格规则确定负荷网格中的边界开关的两段过流保护机制。支线保护时长确定模块1204设置为根据支线网格所对应的配电网区域中的第一保护配置信息,确定支线网格的边界开关的支线保护动作时长。支线机制确定模块1205设置为根据支线保护动作时长,确定支线网格的边界开关的两段过流保护机制。主线保护时长确定模块1206设置为根据主线网格所对应的配电网区域中的第二保护配置信息,确定主线网格的边界开关的主线保护动作时长。主线机制确定模块1207设置为根据主线保护动作时长,确定主线网格的边界开关的方向纵联保护机制。
第一保护配置信息为支线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息;第二保护配置信息为主线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息。
装置执行与前面提供的方法类似的功能,其他功能可参见前面的描述,此处不再赘述。
本申请实施例还从实体装置的角度介绍了一种电子设备。参照图13,图13所示的电子设备1300包括:处理器1301和存储器1303。其中,处理器1301和存储器1303相连,如通过总线1302相连。可选地,电子设备1300还可以包括收发器1304。实际应用中收发器1304不限于一个,该电子设备1300的结构并不构成对本申请实施例的限定。
处理器1301可以是中央处理器(Central Processing Unit,CPU),通用处理器,数据信号处理器(Digital Signal Processor,DSP),专用集成电路(Application Specific Integrated Circuit,ASIC),现场可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框,模块和电路。处理器1301也可以是实现计算功能的组合,例如包含一个或多个微处理器组合,DSP和微处理器的组合等。
总线1302可包括一通路,在上述组件之间传送信息。总线1302可以是外设部件互连标准(Peripheral Component Interconnect,PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture,EISA)总线等。总线1302可以分为地址总线、数据总线、控制总线等。为便于表示,图13中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
存储器1303可以是只读存储器(Read Only Memory,ROM)或可存储静态信息和指令的其他类型的静态存储设备,随机存取存储器(Random Access Memory,RAM)或者可存储信息和指令的其他类型的动态存储设备,也可以是电可擦可编程只读存储器(Electrically Erasable Programmable Read Only Memory,EEPROM)、只读光盘(Compact Disc Read Only Memory,CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
存储器1303用于存储执行本申请方案的应用程序代码,并由处理器1301来控制执行。处理器1301用于执行存储器1303中存储的应用程序代码,以实现前述方法实施例所示的内容。
其中,电子设备包括:移动电话、笔记本电脑、数字广播接收器、个人数字助理(Personal Digital Assistant,PDA)、平板电脑(PAD)、便携式多媒体播放器(Tablet Personal Computer,PMP)、车载终端(例如车载导航终端)等等的移动终端以及数字TV、台式计算机等等的固定终端,还可以为服务器等。图13示出的电子设备是一个示例。
本申请实施例提供了一种计算机可读存储介质,该计算机可读存储介质上存储有计算机程序,当其在计算机上运行时,使得计算机可以执行前述方法实施例中相应内容。该存储介质可以是只读存储器,磁盘或光盘等。
本申请实施例还提供了一种计算机程序产品。该计算机程序产品包括存储在计算机可读存储介质上的计算机程序,该计算机程序包括程序指令,当该程序指令被计算机执行时,使该计算机执行上述方法实施例中的相应内容。
Claims (14)
- 一种配电网网格化保护方法,所述方法包括:从配电网线路的各个开关中确定出边界开关;根据所述边界开关划分所述配电网线路,以确定出负荷网格、支线网格以及主线网格;根据预设负荷网格规则确定所述负荷网格中的边界开关的两段过流保护机制;根据所述支线网格所对应的配电网区域中的第一保护配置信息,确定所述支线网格的边界开关的支线保护动作时长;根据所述支线保护动作时长,确定所述支线网格的边界开关的两段过流保护机制;根据所述主线网格所对应的配电网区域中的第二保护配置信息,确定所述主线网格的边界开关的主线保护动作时长;根据所述主线保护动作时长,确定所述主线网格的边界开关的方向纵联保护机制;其中,所述第一保护配置信息为所述支线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息;所述第二保护配置信息为所述主线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息。
- 根据权利要求1所述的方法,其中,所述边界开关包括主线边界开关、支线边界开关以及负荷边界开关,所述从配电网线路的各个开关中确定出边界开关,包括:根据所述配电网线路的主干线上的主干线开关,确定出所述主线边界开关;根据所述配电网线路的支线上的分支开关,以及与分布式电源相连接的分界开关,确定出所述支线边界开关,所述分支开关为控制所述支线与所述主干线之间的连接的开关;根据所述配电网线路中与负荷相连接的各个负荷开关,确定出所述负荷边界开关。
- 根据权利要求2所述的方法,其中,所述根据所述配电网线路的主干线上的主干线开关,确定出所述主线边界开关,包括:以变电站出线开关为始,沿所述配电网线路的主干线,从各个主干线开关中依次将满足预设阈值条件的主干线开关确定为主线边界开关;其中,所述预设阈值条件为相邻的两个所述主线边界开关之间的配电线路段所带的总负荷容量超出预设负荷容量值,或者在所述配电线路段中所连接的支线数不低于预设支线数量。
- 根据权利要求2所述的方法,其中,所述根据所述配电网线路的支线上的分支开关,以及与分布式电源相连接的分界开关,确定出所述支线边界开关,包括:从各个支线中确定出目标支线,其中,所述目标支线为各个支线中与变电站母线之间的主干线段上存在至少两个主干线开关的支线;将所述目标支线中的分支开关以及与分布式电源相连接的分界开关,确定为支线边界开关。
- 根据权利要求1所述的方法,其中,所述根据所述边界开关划分所述配电网线路,以确定出负荷网格、支线网格以及主线网格,包括:从所述边界开关中,确定出第一边界开关,所述第一边界开关为下游配电网区域中无其他边界开关,且,下游配电网区域中无大容量分布式电源的边界开关;将所述第一边界开关及所述第一边界开关的下游配电网区域划分为负荷网格;从所述边界开关中,确定出第二边界开关,所述第二边界开关为满足预设划分条件的边界开关;将所述第二边界开关及所述第二边界开关的下游配电网区域划分为支线网格;从所述边界开关中,确定出第三边界开关,所述第三边界开关为位于主干线上的边界开关;将所述配电网中位于相邻两个第三边界开关之间的配电网区域,划分为主线网格;其中,所述预设划分条件包括第一预设划分条件以及第二预设划分条件;所述第一预设划分条件为边界开关位于配电网线路中的非主干线上,且边界开关的下游配电网区域中存在负荷网格;所述第二预设划分条件为边界开关位于配电网线路中的非主干线上,且边界开关的下游配电网区域中存在大容量分布式电源。
- 根据权利要求1或5所述的方法,其中,所述支线保护动作时长包括一段支线动作时长以及二段支线动作时长;所述根据所述支线网格所对应的配电网区域中的第一保护配置信息,确定所述支线边界开关的支线保护动作时长,包括:判断所述支线网格中是否存在支线下级网格,所述支线下级网格为所述支线网格所对应的配电网区域所包含的其他网格;如果否,包括:将第一预设时长确定为所述一段支线动作时长;以及将第二预设时长确定为所述二段支线动作时长,其中,所述第二预设时长大于所述第一预设时长,且所述第二预设时长与所述第一预设时长的差值为第一预设延时时长;如果是,包括:根据所述第一保护配置信息,确定一段最大下级动作时长以及二段最大下级动作时长,所述一段最大下级动作时长为支线下级网格对应的一段动作时长中最大的时长,所述二段最大下级动作时长为支线下级网格对应的二段动作时长中最大的时长;以及在所述一段最大下级动作时长的基础上叠加第二预设延时时长,以得到所述一段支线动作时长;在所述二段最大下级动作时长的基础上叠加第三预设延时时长,以得到所述二段支线动作时长。
- 根据权利要求1所述的方法,其中,所述根据所述支线保护动作时长,确定所述支线网格的边界开关的两段过流保护机制,包括:判断所述支线网格所对应的配电网区域中是否存在大容量分布式电源;如果是,根据所述支线保护动作时长,确定所述支线网格的边界开关的两段方向过流保护机制;如果否,根据所述支线保护动作时长,确定所述支线网格的边界开关的两段过流保护机制。
- 根据权利要求1所述的方法,其中,所述根据所述主线网格所对应的配电网区域中的第二保护配置信息,确定所述主线网格的边界开关的主线保护动作时长,包括:判断所述主线网格所对应的配电网区域中是否存在主线下级网格,所述主线下级网格包括负荷网格以及支线网格;如果否,确定所述主线网格的边界开关的主线动作时长为0;如果是,包括:根据所述第二保护配置信息,从所述主线下级网格各自对应的保护动作时长中,确定出一段最大动作时长;以及在所述一段最大动作时长的基础上叠加第四预设延时时长,以得到所述主线网格的边界开关的主线保护动作时长。
- 根据权利要求1所述的方法,还包括:根据所述配电网线路中的各个边界开关的保护动作时长,确定所述配电网线路中的变电站出线开关的出线保护动作时长;根据所述出线保护动作时长,确定所述变电站出线开关的两段过流保护机制。
- 根据权利要求9所述的方法,其中,各个负荷网格的边界开关所对应的负荷保护动作时长包括一段负荷动作时长以及二段负荷动作时长;各个支线网格的边界开关所对应的支线保护动作时长包括一段支线动作时长以及二段支线动作时长;所述出线保护动作时长包括一段出线保护时长以及二段出线保护时长;所述根据所述配电网线路中的各个边界开关的保护动作时长,确定所述配电网线路中的变电站出线开关的出线保护动作时长,包括:将所述一段支线动作时长、所述一段负荷动作时长以及主线保护动作时长中最大的时长,确定为最大一段时长;在所述最大一段时长的基础上,叠加第五预设延时时长,以确定所述变电站出线开关的一段出线保护时长;在所述一段出线保护时长的基础上,叠加第六预设延时时长,以确定所述变电站出线开关的二段出线保护时长。
- 一种配电网网格化保护装置,包括:边界开关确定模块,设置为从配电网线路的各个开关中确定出边界开关;网格划分模块,设置为根据所述边界开关划分所述配电网线路,以确定出负荷网格、支线网格以及主线网格;负荷机制确定模块,设置为根据预设负荷网格规则确定所述负荷网格中的边界开关的两段过流保护机制;支线保护时长确定模块,设置为根据所述支线网格所对应的配电网区域中的第一保护配置信息,确定所述支线网格的边界开关的支线保护动作时长;支线机制确定模块,设置为根据所述支线保护动作时长,确定所述支线网格的边界开关的两段过流保护机制;主线保护时长确定模块,设置为根据所述主线网格所对应的配电网区域中的第二保护配置信息,确定所述主线网格的边界开关的主线保护动作时长;主线机制确定模块,设置为根据所述主线保护动作时长,确定所述主线网格的边界开关的方向纵联保护机制;其中,所述第一保护配置信息为所述支线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息;所述第二保护配置信息为所述主线网格所对应的配电网区域中已经确定好保护机制的边界开关的保护机制的信息。
- 一种电子设备,包括:一个或多个处理器;存储装置,用于存储一个或多个程序;当所述一个或多个程序被所述一个或多个处理器执行,使得所述一个或多个处理器实现如权利要求1-10中任一所述的方法。
- 一种计算机可读介质,所述计算机可读介质上存储有计算机程序,所述程序被处理器执行时实现如权利要求1-10中任一所述的方法。
- 一种计算机程序产品,包括存储在计算机可读存储介质上的计算机程序,所述计算机程序包括程序指令,当所述程序指令被计算机执行时,使所述计算机执行如权利要求1-10任一项所述的方法。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410909759.5 | 2024-07-05 | ||
| CN202410909759.5A CN118801305A (zh) | 2024-07-05 | 2024-07-05 | 配电网网格化保护方法、装置、设备、介质及程序产品 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2026007485A1 true WO2026007485A1 (zh) | 2026-01-08 |
Family
ID=93019437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2025/087181 Pending WO2026007485A1 (zh) | 2024-07-05 | 2025-04-03 | 配电网网格化保护方法、装置、设备、介质及程序产品 |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN118801305A (zh) |
| WO (1) | WO2026007485A1 (zh) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118801305A (zh) * | 2024-07-05 | 2024-10-18 | 南京南瑞继保工程技术有限公司 | 配电网网格化保护方法、装置、设备、介质及程序产品 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130262922A1 (en) * | 2012-03-27 | 2013-10-03 | State Grid Corporation Of China | Centralized and networked protection system and method of a regional distribution network |
| CN104242274A (zh) * | 2014-10-10 | 2014-12-24 | 中国南方电网有限责任公司 | 含分布式电源配电网的状态量差动保护方法 |
| WO2016071070A1 (de) * | 2014-11-05 | 2016-05-12 | Siemens Ag Österreich | Trennen von fehlerhaften netzabschnitten eines niederspannungsnetzes von weiteren netzabschnitten |
| CN112952780A (zh) * | 2021-02-03 | 2021-06-11 | 国网安徽省电力有限公司马鞍山供电公司 | 一种配电网分层分级保护整定计算方法 |
| CN114400636A (zh) * | 2022-01-19 | 2022-04-26 | 国网吉林省电力有限公司 | 一种基于无线通信的分布式电源接入区域保护系统及方法 |
| CN118801305A (zh) * | 2024-07-05 | 2024-10-18 | 南京南瑞继保工程技术有限公司 | 配电网网格化保护方法、装置、设备、介质及程序产品 |
-
2024
- 2024-07-05 CN CN202410909759.5A patent/CN118801305A/zh active Pending
-
2025
- 2025-04-03 WO PCT/CN2025/087181 patent/WO2026007485A1/zh active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130262922A1 (en) * | 2012-03-27 | 2013-10-03 | State Grid Corporation Of China | Centralized and networked protection system and method of a regional distribution network |
| CN104242274A (zh) * | 2014-10-10 | 2014-12-24 | 中国南方电网有限责任公司 | 含分布式电源配电网的状态量差动保护方法 |
| WO2016071070A1 (de) * | 2014-11-05 | 2016-05-12 | Siemens Ag Österreich | Trennen von fehlerhaften netzabschnitten eines niederspannungsnetzes von weiteren netzabschnitten |
| CN112952780A (zh) * | 2021-02-03 | 2021-06-11 | 国网安徽省电力有限公司马鞍山供电公司 | 一种配电网分层分级保护整定计算方法 |
| CN114400636A (zh) * | 2022-01-19 | 2022-04-26 | 国网吉林省电力有限公司 | 一种基于无线通信的分布式电源接入区域保护系统及方法 |
| CN118801305A (zh) * | 2024-07-05 | 2024-10-18 | 南京南瑞继保工程技术有限公司 | 配电网网格化保护方法、装置、设备、介质及程序产品 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118801305A (zh) | 2024-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101297450B (zh) | 用于电力分配系统的故障保护系统和方法 | |
| CN101641849B (zh) | 节省保险丝的配电系统故障保护 | |
| CN104333118B (zh) | 中阻接地方式自适应投切的备自投系统及其运行方法 | |
| CN106058829B (zh) | 一种用于配电系统的故障保护系统 | |
| CN206211516U (zh) | 基于三取二冗余跳闸逻辑的大容量柔性直流换流站保护系统 | |
| CN111030058B (zh) | 一种基于5g通信的配电网分区保护方法 | |
| CN104701831A (zh) | 配电网自愈控制方法 | |
| CN109787224B (zh) | 一种防止连锁过载的地区电网负荷转供策略生成方法 | |
| WO2026007485A1 (zh) | 配电网网格化保护方法、装置、设备、介质及程序产品 | |
| Esfahani et al. | An intelligent protection scheme to deal with extreme fault currents in smart power systems | |
| Wheeler et al. | A microgrid protection scheme using differential and adaptive overcurrent relays | |
| CN109064071A (zh) | 一种基于保护失效的智能变电站二次系统风险评估方法 | |
| CN106786429A (zh) | 一种变电站的站域保护优化配置方法及系统 | |
| CN113346460A (zh) | 一种适用于花瓣式配电网的区域后备保护方法及系统 | |
| CN106159911B (zh) | 基于变电站现有保护逻辑量的站域保护系统及方法 | |
| CN105356430B (zh) | 一种有源闭环配电网保护系统及方法 | |
| Tasdighi et al. | Impact analysis of network topology change on transmission distance relay settings | |
| CN106329492A (zh) | 一种基于系统拓扑的简易母线保护方法 | |
| CN104466923A (zh) | 接入微网的配电网保护电路和系统 | |
| Ituzaro et al. | Zonal overcurrent protection for smart radial distribution systems with distributed generation | |
| Elmitwally et al. | Optimal application of fault current limiters for assuring overcurrent relays coordination with distributed generations | |
| CN118659354A (zh) | 主动配电网重构方法、系统、程序产品及介质 | |
| CN105024360A (zh) | 配网开关站继电保护运行优化方法 | |
| CN105977937B (zh) | 一种基于逻辑量信息的配电网区域保护系统及方法 | |
| CN114530834B (zh) | 一种配电网线路电流闭锁式不完全差动保护方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 25831844 Country of ref document: EP Kind code of ref document: A1 |