Method and system for adjusting power distribution terminal communication network based on wapi

Abstract

To solve a problem of poor economy and safety in an access method of a reactive power adjustment device because a reactive power adjustment device at an existing line termination does not perform access and cannot precisely control a voltage deviation on a user side.SOLUTION: A method includes the steps of: detecting voltage on a user side in real time; analyzing a voltage sensitivity type for a user; grouping and adjusting a reactive voltage on the user side based on the voltage sensitivity type of the user; and determining that an adjusted voltage deviation on the user side is acceptable, and repeating the grouping and adjusting until the voltage deviation is acceptable. By combining a substation side adjustment device with a line termination adjustment device, the reactive voltage on the user side is adjusted step by step, the voltage is adjusted further precisely, and voltage requirements of the user with different requirements are satisfied, to ensure that respective input power of each user at the line termination is within a reasonable range.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of power grid scheduling, and in particular to a method and system for coordinating a power distribution terminal communication network based on WAPI. [Background technology]

[0002] As urbanization rates increase, cable rates continue to rise. Factories stop work during holidays such as the Chinese New Year, and residential areas see an increase in vacant spaces. This has led to problems with reactive voltage backfeed at some substations. Reactive power backfeed can lead to increased line losses, overvoltages, and reduced equipment lifespans.

[0003] Conventional reactive voltage regulation is achieved by roughly controlling the main line voltage through a small number of capacitors and reactors on the substation side. Reactive voltage control is performed only at the line master node, which is relatively rough. In areas with many line branches and high user sensitivity requirements, there is a lack of safe and effective local communication (terminal communication) control technology, making it impossible to control a large number of distributed terminal-side adjustment devices and achieve precise control all the way to the user side. Building separate communication systems for each type of reactive control device results in no unified standards, no mutual complementarity, no unified monitoring and management, no safety assurance, and wasted investment.

[0004] Regarding the access methods of existing reactive power regulating devices, wired access is generally via optical fiber, which requires communication access from a large number of distributed terminals, resulting in high communication costs and poor economic efficiency.There are two options for wireless access: public network APN channel or Wi-Fi.However, these two methods pose significant risks in terms of security and stability and are not generally used. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention mainly aims to provide a method and system for adjusting a distribution terminal communication network based on WAPI, in order to solve the problems that the existing reactive power regulating devices at the line end are not accessible, cannot precisely control the voltage deviation on the user side, and the general access method of the reactive power regulating device is not economical and safe. [Means for solving the problem]

[0006] The above technical problems of the present invention are mainly solved by the following technical solution: a power distribution terminal communication network system based on WAPI, comprising: a power grid control side and a reactive power regulating terminal side, the power grid control side comprising a control center and a WAPI network control master station, the reactive power regulating terminal side comprising a reactive power regulating device, a wireless terminal access device, a wireless access point and a switch, the reactive power regulating device comprising a line termination regulating device and a substation-side regulating device, the line termination regulating device is connected to the wireless terminal access device, the wireless terminal access device is wirelessly connected to the wireless access point, the wireless access point is connected to the switch, the control center and the WAPI network control master station are connected to the switch via a network, the substation-side regulating device is connected to the control center via the network, and the control center selects the line termination regulating device or the substation-side regulating device to regulate voltage according to a voltage deviation situation on the user side.

[0007] In this invention, a WAPI control master station is deployed in a power grid control center, and wireless access points are installed near reactive power regulating terminals to achieve WAPI network coverage. The reactive power regulating terminals are connected to wireless terminal access devices, allowing the reactive power regulating terminals to access the power grid automation control system through the WAPI network. A two-way certificate authentication mechanism is used to authenticate the identity of the reactive power regulating terminals accessing the WAPI network, ensuring the security of the accessing reactive power regulating terminals. Based on the above secure wireless terminal access network, a large number of distributed reactive power regulating terminals can be connected to the network, and then transmitted to the power grid control center via the power grid scheduling automation network. The power grid control center can then perform an integrated analysis of the reactive voltage of the entire network to accurately control various reactive power regulating terminals and achieve accurate voltage regulation on the user side.

[0008] The control center and the WAPI network control master station are connected via a grid scheduling automation network, the reactive power adjustment terminal side accesses the grid scheduling automation network, the substation side adjustment device is connected to the control center via the grid scheduling automation network, and the line termination adjustment device is connected via the WAPI network to access the grid scheduling automation network and to the control center via the grid scheduling automation network. The WAPI network control master station is used to manage WAPI network devices and perform identity authentication for line termination adjustment devices accessing the WAPI network. The reactive power adjustment device includes two types of adjustment devices installed on the substation side and the line termination side. The substation side adjustment device includes reactors, capacitors, load adjustment transformers, etc., and the line termination adjustment device includes motors, reactive power compensators, etc. The substation-side adjustment device is connected to the control center via a grid scheduling automation network, and the line termination adjustment devices are networked with each other via a WAPI network and connected to the grid scheduling automation network via WAPI, accessing the grid scheduling automation network and connecting to the control center. Specifically, the line termination adjustment device is connected to a wireless terminal access device, which is wirelessly connected to a nearby wireless access point, which is connected to a switch, which includes a Layer 2 POE switch and a Layer 2 access CE switch, and the wireless access point is connected to the Layer 2 POE switch, which is connected to the Layer 2 access CE switch, which is connected to the grid scheduling automation network via the Layer 2 access CE switch. The substation-side adjustment device performs coarse line voltage adjustment to meet the line voltage requirements of general users. The line termination adjustment device performs fine line voltage adjustment to meet the line voltage requirements of voltage-sensitive users. The control center receives user-side voltage information in real time, calculates the user-side reactive voltage deviation based on the voltage information, and if the reactive voltage deviation is large, controls the line termination adjustment device and the substation-side adjustment device to adjust the user-side reactive voltage and reduce the reactive voltage deviation.The voltage sensitivity type of each user is analyzed, and the user-side reactive voltage is grouped and adjusted based on the user's voltage sensitivity type. In the group adjustment method, voltage-sensitive users are sequentially adjusted by the substation-side adjustment device and the line termination adjustment device. When the user-side reactive voltage deviation is large, the substation-side adjustment device first roughly adjusts the user-side reactive voltage, adjusting the voltage deviation to a set first voltage deviation value, then finely adjusts it by the line termination adjustment device, and finally adjusts it to a set second voltage deviation value, which is a voltage deviation value suitable for sensitive users and meets the needs of users who are sensitive to line voltage. When the user-side reactive voltage deviation is small, the line termination adjustment device directly finely adjusts the voltage deviation to the set second voltage deviation value. For users who are not voltage-sensitive, the substation-side adjustment device adjusts the user-side reactive voltage, adjusting the voltage deviation to a set first voltage deviation value, which is a voltage deviation value suitable for users who are not sensitive to line voltage, meets the needs of users who are not sensitive to line voltage. The present invention uses a substation regulator and a line termination regulator to gradually adjust the user's reactive voltage. When a user has high requirements for line voltage and the reactive power adjustment by the substation regulator still does not meet the user's line voltage needs, the line termination regulator is adjusted in real time through the WAPI network to ensure that the input power of each user at the line termination is within a reasonable range. The present invention can adjust the voltage more precisely and meet the needs of users with different voltage requirements.

[0009] As a preferred solution, the WAPI network control master station includes an AS identification server and an AC controller, and the AS identification server and the AC controller are connected to the reactive power adjustment terminal side via a network.

[0010] The AC controller controls and manages its associated wireless access points in the WAPI network. The AS identification server authenticates the identity of line termination adjusters that access the WAPI network. The AS identification server and the AC controller are each connected to the WAPI network by a power grid scheduling automation network.

[0011] As a preferred solution, the reactive power regulating terminal side further includes a voltage detection unit, which is connected to the point where the electric meter enters the network, and the voltage detection unit is connected to the control center via the network to detect the voltage on the user side.

[0012] The voltage detection unit is installed in an electric meter that enters a user's network, and the voltage detection unit is installed separately or integrated in the electric meter, and the voltage detection unit collects the voltage of the electric meter, and the collected reactive voltage information is transmitted to the power grid control center via the network.

[0013] The coordination method of the power distribution terminal communication network based on WAPI is as follows: Step S1: detecting the voltage on the user side in real time; Step S2 of analyzing the type of voltage sensitivity for the user; Step S3: grouping and adjusting reactive voltages on the user side according to the type of voltage sensitivity of the user; The method includes step S4 of determining whether the voltage deviation on the user side after adjustment is acceptable, and repeating the group adjustment until the voltage deviation is acceptable.

[0014] The control center receives user-side voltage information in real time, calculates user-side reactive voltage deviations based on the voltage information, and controls the line termination regulator and the substation-side regulator to adjust the user-side reactive voltages and reduce the reactive voltage deviations when the reactive voltage deviations occur. After calculating the user-side reactive voltage deviations, the voltage sensitivity types of the users are analyzed, and the user-side reactive voltages are grouped and adjusted according to the user's voltage sensitivity types. In the grouping adjustment method, voltage-sensitive users are sequentially adjusted by the substation-side regulator and the line termination regulator. When the user-side reactive voltage deviation is large, the substation-side regulator first roughly adjusts the user-side reactive voltage, then the line termination regulator finely adjusts the user-side reactive voltage, and finally adjusts to an appropriate reactive voltage value, so that the voltage deviation is within an appropriate range and meets the needs of the line voltage-sensitive users. When the user-side reactive voltage deviation is small, the line termination regulator directly and precisely adjusts the reactive voltage. For users who are not sensitive to voltage, the reactive voltage is adjusted by the substation-side regulator so that the voltage deviation is adjusted to an appropriate voltage deviation value, thereby meeting the line voltage needs of users who are not sensitive to voltage. The present invention uses a group adjustment method to combine the substation-side regulator and the line termination regulator to adjust the user-side reactive voltage in stages. When a user has high requirements for line voltage and the reactive power adjustment by the substation-side regulator still does not meet the user's line voltage needs, the line termination regulator is adjusted in real time through the WAPI network to adjust the voltage more precisely, meeting the voltage needs of users with different requirements, and ensuring that the input power of each user at the line termination is within a reasonable range.

[0015] In a preferred solution, the step of analyzing the type of voltage sensitivity for the user specifically comprises: The method includes a step of marking the user's sensitive type in advance, and obtaining the user's sensitive type information based on the sensitive type mark.

[0016] When users access the power grid, they are classified and marked according to their voltage needs, and are marked as voltage-sensitive users and voltage-insensitive users, respectively. Voltage-sensitive users have higher voltage quality requirements, requiring a stable voltage deviation of ±0.5%, while voltage-insensitive users have lower voltage quality requirements, typically requiring a stable voltage deviation of ±2% to ±3%. The control center obtains the user's marking information and determines whether the user is a voltage-sensitive user or a voltage-insensitive user.

[0017] As a preferred solution, the step of grouping and adjusting the reactive voltage deviations at the user side according to the type of voltage sensitivity of the user specifically includes: if the user is a voltage-sensitive user, adjusting the reactive voltage at the user side by sequentially using the first adjusting method and the second adjusting method; If the user is a voltage insensitive user, the method includes adjusting the reactive voltage at the user side using a first adjustment method.

[0018] For voltage-sensitive users, when the user-side reactive voltage deviation is large, the substation-side regulating device first roughly adjusts the user-side reactive voltage to reduce the user-side voltage deviation and adjust the voltage deviation to a set first voltage deviation value. Then, the line termination regulating device makes a fine adjustment, and finally adjusts the voltage deviation to a set second voltage deviation value, which is a voltage deviation value suitable for sensitive users and meets the needs of users who are sensitive to line voltage. When the user-side reactive voltage deviation is small, the line termination regulating device directly makes a fine adjustment, adjusting the voltage deviation to the set second voltage deviation value. For users who are not voltage-sensitive, the substation-side regulating device adjusts the voltage deviation to a set first voltage deviation value, which is a voltage deviation value suitable for users who are not sensitive to line voltage and meets the needs of users who are not sensitive to line voltage.

[0019] The preferred solution is setting a first adjustment threshold; The method includes a step of determining whether the reactive voltage deviation at the user side exceeds a first adjustment threshold, and if so, adjusting the reactive voltage so that the voltage deviation is adjusted to the first adjustment threshold, and if not, not making any adjustment, wherein the first adjustment threshold is a voltage deviation value suitable for a non-sensitive user.

[0020] The first adjustment method is to adjust the user-side reactive voltage by controlling the substation-side adjustment device, specifically, to roughly adjust the transmission voltage of the distribution line for the reactor, capacitor, and load-on-load adjustment transformer through the power grid scheduling automation network, and adjust the voltage deviation to the first adjustment threshold.

[0021] The preferred solution is setting a second adjustment threshold; The method includes a step of determining whether the reactive voltage deviation on the user side is between a second adjustment threshold and the first adjustment threshold, and if so, adjusting the reactive voltage so that the voltage deviation is adjusted to the second adjustment threshold, and if not, not making any adjustment, wherein the second adjustment threshold is a voltage deviation value suitable for sensitive users.

[0022] The second adjustment method is to adjust the reactive voltage on the user side by controlling the line termination adjustment device. Specifically, the line termination voltage is fine-tuned by adjusting the motor rotation speed, excitation voltage, removal / installation of the reactive power compensation device, etc., and the voltage deviation is adjusted to the second adjustment threshold value.

[0023] The preferred solution is Mark the input reactive power regulators, including the substation regulator and the line termination regulator; The first adjustment method includes obtaining a corresponding substation-side adjustment device on a user side, and using the substation-side adjustment device to adjust the reactive voltage; The second adjusting method includes the steps of obtaining a corresponding line termination adjusting device at a user side and using the line termination adjusting device to adjust the reactive voltage.

[0024] The reactive power regulators are marked when input into the control center system and are marked as substation side regulators and line end regulators, respectively. Specifically, the first adjustment method uses the power grid scheduling automation network to roughly adjust the transmission voltage of the distribution line for reactors, capacitors, and load-on regulating transformers, while the second adjustment method fine-tunes the line end voltage by adjusting the motor speed, excitation voltage, and removal / installation of reactive power compensators, etc.

[0025] As a preferred solution, step S4 specifically includes: setting a sensitive voltage deviation range and an insensitive voltage deviation range; Determining whether the adjusted voltage deviation of the voltage-sensitive user is within the sensitive voltage deviation range, and if so, terminating the adjustment; if not, returning to step S2 and repeating the group adjustment; and determining whether the adjusted voltage deviation of the user who is not sensitive to voltage is within the insensitive voltage deviation range, and if so, terminating the adjustment; if not, returning to step S2 and repeating the grouping adjustment.

[0026] By setting a sensitive voltage deviation range and an insensitive voltage deviation range, the voltage deviation on the user side after adjustment is compared and judged to determine whether it is within the corresponding voltage deviation range, and if it is not within the corresponding voltage deviation range, a warning is issued, and steps S2 to S4 are repeated to adjust the reactive power on the user side until the voltage deviation is adjusted to an appropriate deviation range.

[0027] In a preferred solution, the step of analyzing the type of voltage sensitivity for the user comprises: If the user does not have a sensitive type mark, obtain the user's historical power supply record, and set the user's sensitive type based on the historical power supply record. First, determine the user's voltage sensitive type from the historical power supply record, and obtain the power supply information of the most recent month or week; If the user does not have a history power supply record, determine whether the user's reactive power adjustment device is connected to the reactive power adjustment terminal side, if yes, proceed to the next step for determination, if not, set as a voltage-insensitive user; if the user does not have a history power supply record, first determine whether the user is connected to the power grid fine-tuning, that is, detect whether the user has access to the power grid local WAPI network, if yes, by default the user needs to perform voltage deviation fine-tuning, and set the user as a voltage-sensitive user; determining whether the user is an industrial user or a general user, and if the user is a general user, setting the user as a user who is not sensitive to voltage, and if the user is an industrial user, proceeding to the next step to determine; and obtaining a user's industry code, determining whether the user belongs to a set voltage-sensitive industry, and if so, setting the user as a voltage-sensitive user, or if not, setting the user as a voltage-insensitive user. The industry code represents the characteristics of the industry to which the industrial user belongs and reflects the user's requirements for power supply voltage deviation, and the control center pre-sets a voltage-sensitive industry range, and if the user's industry code falls within the range, sets the user as a voltage-sensitive user, or if not, sets the user as a voltage-insensitive user. [Effects of the Invention]

[0028] Therefore, the present invention has the following advantages:

[0029] 1. The reactive power regulating terminals access the power grid automation control system via the WAPI network, and the power grid control center performs integrated analysis of the reactive voltages of the entire network to accurately control various reactive power regulating terminal devices, improve safety and reliability, and realize integrated monitoring and management.

[0030] 2. Various reactive power regulators are reused through the WAPI network to achieve precise regulation of line voltage.

[0031] 3. Using the group adjustment method, the substation-side adjustment device and the line termination adjustment device are combined to gradually adjust the user-side reactive voltage. When the user has high requirements for line voltage and the reactive power adjustment by the substation-side adjustment device still does not meet the user's needs for line voltage, the line termination adjustment device is adjusted in real time through the WAPI network to adjust the voltage more precisely, meet the voltage needs of users with different requirements, and ensure that the input power of each user at the line termination is within a reasonable range. [Brief explanation of the drawings]

[0032] [Figure 1] 1 is a schematic structural diagram of the present invention; [Figure 2] 1 is a schematic flow chart of the method of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0033] The following examples will further illustrate the technical solutions of the present invention in detail with reference to the accompanying drawings.

[0034] Working Example: As shown in FIG. 1 , the power distribution terminal communication network system based on WAPI in this embodiment includes a power grid control side 1 and a reactive power adjustment terminal side 2, the power grid control side includes a control center 11 and a WAPI network control master station 12, the WAPI network control master station 12 includes an AS identification server 121 and an AC controller 122, and the control center 11, the AS identification server and the AC controller are respectively connected to the reactive power adjustment terminal side 2 by a power grid scheduling automation network. The reactive power adjustment terminal side 2 includes a reactive power adjustment device, a wireless terminal access device 23, a wireless access point 24, and a switch, and the reactive power adjustment device includes a line termination adjustment device 21 and a substation side adjustment device 22, and the line termination adjustment device 21 is connected to the wireless terminal access device 23, and the wireless terminal access device 23 is wirelessly connected to the wireless access point 24, where the switch includes a CE switch and a POE switch, and the wireless access point 24 is connected to the CE switch, the CE switch is connected to the POE switch, and the POE switch is connected to a power grid scheduling automation network, and are respectively connected to the control center 1, the AS identification server 121, and the AC controller 122 via the power grid scheduling automation network. The substation side adjustment device 22 is connected to the power grid scheduling automation network via the switch, and is respectively connected to the control center 1 via the power grid scheduling automation network. The line termination adjustment device 21, the wireless terminal access device 23, the wireless access point 24, the CE switch, and the POE switch constitute a WAPI network, and the WAPI network accesses the power grid scheduling automation network, so that the line termination adjustment device accesses the power grid scheduling automation network through the WAPI network and is connected to the control center. The reactive power adjustment terminal side 2 further includes a voltage detection unit, which is connected to the point where the electric meter enters the network and is connected to the control center via the power grid scheduling automation network.

[0035] In this embodiment, the WAPI network control master station specifically includes an AS identification server 121 and an AC controller 122, which are deployed in the power grid control center. The AS identification server 121 authenticates the identity of line termination adjustment devices accessing the WAPI network, and the AC controller controls and manages its associated wireless access points in the WAPI network. The reactive power adjustment device specifically includes two types of adjustment devices installed on the substation side and the line terminal. The substation side adjustment device 22 includes reactors, capacitors, load adjustment transformers, etc., and performs coarse line voltage adjustment to meet the line voltage requirements of general users. The line terminal adjustment device 21 includes motors, reactive power compensators, etc., and performs fine line voltage adjustment to meet the line voltage requirements of voltage-sensitive users. The substation-side coordinator is connected to the control center 1 via the power grid scheduling automation network, and the line termination coordinator is connected to the network via WAPI, accessing the power grid scheduling automation network through the WAPI network and connecting to the control center. The wireless terminal access devices 23 correspond to the line termination coordinators 21, and each wireless terminal access device is connected to a corresponding line termination coordinator. The wireless terminal access devices are used to connect the line termination coordinators to a wireless access point. The wireless access point 24 is located near the line termination coordinator, and its range can cover the locations of multiple line termination coordinators, and multiple line termination coordinators can all be connected to the wireless access point. Specifically, the reactive power coordinator-side connection structure is such that the line termination coordinator is connected to the wireless terminal access device, and the wireless terminal access device is wirelessly connected to a nearby wireless access point, which is connected to a switch, which includes a Layer 2 POE switch and a Layer 2 access CE switch, and the wireless access point is connected to the Layer 2 POE switch, which is connected to the Layer 2 access CE switch, and connected to the power grid scheduling automation network via the Layer 2 access CE switch.The configured WAPI network uses a two-way certificate authentication mechanism to authenticate the identity of terminals accessing the WAPI network, ensuring the security of the accessing terminals. Technologies such as wireless interference detection (WIDS) enable security detection of illegal terminals, malicious user attacks, and WLAN intrusion attempts, ensuring air interface security. Data encryption is used for WAPI network data transmission, encrypting data using the state-secret SM4 encryption algorithm to ensure end-to-end data security. The substation-side adjustment device 22 is connected to the power grid scheduling automation network via a switch and then to the control center. A voltage detection unit is further installed on the reactive power adjustment terminal side to collect user-side voltage. The voltage detection unit is connected to the point where the electric meter enters the network. The voltage detection unit is installed separately or integrated into the electric meter. The voltage detection unit accesses the power grid scheduling automation network and connects to the control center, thereby transmitting real-time detected user-side voltage to the control center. The control center receives user-side voltage information in real time and calculates the user-side reactive voltage deviation based on the voltage information. When the reactive voltage deviation is large, it controls the line termination regulator and the substation-side regulator to adjust the user-side reactive voltage and reduce the reactive voltage deviation. The voltage sensitivity type of each user is analyzed, and the user-side reactive voltage is grouped and adjusted based on the user's voltage sensitivity type. In the grouping adjustment method, voltage-sensitive users are sequentially adjusted by the substation-side regulator and the line termination regulator. When the user-side reactive voltage deviation is large, the substation-side regulator first roughly adjusts the user-side reactive voltage, adjusting the voltage deviation to a set first voltage deviation value, then finely adjusts it by the line termination regulator, and finally adjusts it to a set second voltage deviation value, which is a voltage deviation value suitable for the sensitive user and meets the needs of the user who is sensitive to line voltage. When the user-side reactive voltage deviation is small, the line termination regulator directly finely adjusts the voltage deviation to the set second voltage deviation value.For users who are not sensitive to voltage, the substation-side regulator adjusts the user-side reactive voltage to a preset first voltage deviation value, which is a voltage deviation value suitable for users who are not sensitive to line voltage and meets the needs of users who are not sensitive to line voltage. The present invention uses the substation-side regulator and the line termination regulator to gradually adjust the user-side reactive voltage. If a user has high line voltage requirements and the reactive power adjustment by the substation-side regulator still does not meet the user's line voltage needs, the WAPI network adjusts the line termination regulator in real time to ensure that the input power of each user at the line termination is within a reasonable range. The present invention can more precisely regulate voltage and meet the needs of users with different voltage requirements.

[0036] In this embodiment, the constructed WAPI network uses a two-way certificate authentication mechanism, and the specific authentication process is as follows: The identity server AS issues certificates representing legal identities to line termination adjusters and wireless access points.

[0037] The line termination adjuster sends an application request for access to the wireless access point, the application information includes the certificate of the line termination adjuster, the wireless access point sends its own certificate and the certificate of the line termination adjuster to an identification server, the identification server verifies the validity of the certificate and then sends the identification information to the wireless access point, which then sends the identification information to the line termination adjuster. If both the certificates of the wireless access point and the line termination adjuster are authenticated, a connection is established between the wireless access point and the line termination adjuster, the wireless access point and the line termination adjuster coordinate a data encryption key, and the line termination adjuster transmits service data to the wireless access point according to the encryption key and the secret data of the encryption algorithm.

[0038] In this embodiment, the construction of a WAPI network and the planning of IP are specifically as follows: Select independently available VLAN and IP resources, for example, 20, based on the existing network switch system. In the existing network system, an independent VLAN, for example 20, is set on the switch port through which data from the WAPI device is sent. An AS identification server, an AC controller, and a network management server are installed on the WAPI main station side, and the IP addresses of VLAN 20 are set. For example, the AC controller is 10.10.10.20, and the AS identification server is 10.10.10.21. A wireless access point AP and a wireless terminal access device CPE are installed on the WAPI terminal side, and an IP address for VLAN 20 is set. For example, the wireless access point AP10.10.10.41 and the wireless terminal access device CPE10.10.10.51 are used. On the WAPI terminal side, a line termination adjuster is connected to the CPE and sets up independent IP information of the service system, which is not the IP resource of the existing network switching system.

[0039] The system of the present invention deploys a WAPI control master station in a power grid control center, installs wireless access points near reactive power regulating terminals to provide WAPI network coverage, and connects the reactive power regulating terminals to wireless terminal access devices to enable the reactive power regulating terminals to access the power grid automation control system through the WAPI network. A two-way certificate authentication mechanism is used to authenticate the identity of the reactive power regulating terminals accessing the WAPI network, ensuring the security of the accessing reactive power regulating terminals. Based on the secure wireless terminal access network, a large number of distributed reactive power regulating terminals can be connected to the network and then transmitted to the power grid control center via the power grid scheduling automation network. The power grid control center then performs integrated analysis of the reactive voltage of the entire network to accurately control various reactive power regulating terminals and achieve accurate voltage regulation on the user side.

[0040] This embodiment further includes a system using a method for coordinating a power distribution terminal communication network based on WAPI, specifically including steps S1 to S4.

[0041] Step S1: Detect the voltage on the user side in real time; The control center receives the voltage information of the user side in real time and calculates the reactive voltage deviation of the user side based on the voltage information.

[0042] Step S2: Analyze the voltage sensitivity type of the user, specifically, The method includes a step of marking the user's sensitive type in advance, and obtaining the user's sensitive type information based on the sensitive type mark.

[0043] In this embodiment, when users access the power grid, they are classified and marked according to their voltage needs, and are marked as voltage-sensitive users and voltage-insensitive users, respectively. Voltage-sensitive users have higher voltage quality requirements, requiring a stable voltage deviation of ±0.5%, while voltage-insensitive users have lower voltage quality requirements, typically requiring a stable voltage deviation of ±2% to ±3%. The control center obtains the user's mark information and determines whether the user is a voltage-sensitive user or a voltage-insensitive user.

[0044] If the user does not have a sensitive type mark, the following steps S201 to S204 are performed.

[0045] Step S201: Obtain the user's historical power supply record, and set the user's sensitivity type based on the historical power supply record. First, determine the user's voltage sensitivity type from the historical power supply record, and obtain the power supply information for the most recent month or week.

[0046] Step S202: If the user does not have a history power supply record, determine whether the user's reactive power adjustment device is connected to the reactive power adjustment terminal side, if yes, proceed to step S203, if not, set as a voltage insensitive user; if the user does not have a history power supply record, first determine whether the user is linked with the fine adjustment of the power grid, that is, detect whether the user has access to the local WAPI network of the power grid, if yes, by default the user needs to perform fine adjustment of the voltage deviation, and set the user as a voltage sensitive user.

[0047] Step S203: It is determined whether the user is an industrial user or a general user. If the user is a general user, the user is set as a user who is not sensitive to voltage, and if the user is an industrial user, the process proceeds to step S204.

[0048] Step S204: Obtain the user's industry code, and determine whether the user belongs to the set voltage-sensitive industry. If so, set the user as a voltage-sensitive user; if not, set the user as a voltage-insensitive user. The industry code represents the characteristics of the industry to which the industrial user belongs and reflects the user's requirements for power supply voltage deviation. The control center pre-sets a voltage-sensitive industry range and makes the determination based on the set range.

[0049] Step S3: Group and adjust the reactive voltage of the user side according to the type of voltage sensitivity of the user, specifically: if the user is a voltage-sensitive user, adjusting the reactive voltage at the user side by sequentially using the first adjusting method and the second adjusting method; If the user is a voltage insensitive user, the method includes adjusting the reactive voltage at the user side using a first adjustment method.

[0050] The specific process of the first adjustment method is as follows: setting a first adjustment threshold; The method includes determining whether the user-side reactive voltage deviation exceeds a first adjustment threshold, and if so, adjusting the reactive voltage so that the voltage deviation is adjusted to the first adjustment threshold, and if not, not adjusting, and proceeding to step S4. The first adjustment method is to adjust the user-side reactive voltage by controlling a substation-side adjustment device, specifically, by using a power grid scheduling automation network to roughly adjust the transmission voltage of the distribution line for reactors, capacitors, and load-on regulating transformers, and adjust the voltage deviation to the first adjustment threshold, where the first adjustment threshold is a voltage deviation value suitable for non-sensitive users.

[0051] The specific process of the second adjustment method is as follows: setting a second adjustment threshold; The method further includes a step of determining whether the user-side reactive voltage deviation is between the second and first adjustment thresholds, and if so, adjusting the reactive voltage so that the voltage deviation is adjusted to the second adjustment threshold; if not, not adjusting the reactive voltage and proceeding to step S4. The second adjustment method is to adjust the user-side reactive voltage by controlling the line termination adjustment device, and the determination condition is specifically whether the voltage deviation is between the second and first adjustment thresholds and includes the first adjustment threshold. The adjustment process specifically involves fine-tuning the line termination voltage by adjusting the motor rotation speed, excitation voltage, removal / installation of a reactive power compensator, etc., to adjust the voltage deviation to the second adjustment threshold, which is a voltage deviation value suitable for sensitive users.

[0052] In the above first and second adjustment methods, the system acquires and adjusts the corresponding reactive power adjustment device, specifically: Marking input reactive power regulators including a substation regulator and a line termination regulator; The first adjustment method includes the steps of obtaining a corresponding substation-side adjustment device on a user side and performing reactive voltage adjustment using the substation-side adjustment device; The second adjusting method includes the steps of obtaining a corresponding line termination adjusting device at a user side and using the line termination adjusting device to adjust the reactive voltage.

[0053] In this embodiment, the reactive power regulators need to be marked when input to the control center system, and are marked as a substation regulator and a line termination regulator, respectively. If adjustment is required using the first adjustment method, the control center obtains the substation regulator associated with the user's location corresponding to the voltage deviation, and specifically, through the power grid scheduling automation network, roughly adjusts the transmission voltage of the distribution line for the reactor, capacitor, and load regulation transformer. If adjustment is required using the second adjustment method, the control center obtains the line termination regulator associated with the user's location corresponding to the voltage deviation, and specifically, adjusts the motor speed, excitation voltage, removal / installation of reactive power compensators, etc., to fine-tune the line termination voltage.

[0054] In this embodiment, for voltage-sensitive users, when the user-side reactive voltage deviation is large, the substation-side regulator first roughly adjusts the user-side reactive voltage to reduce the user-side voltage deviation and adjust the voltage deviation to the first adjustment threshold. After roughly adjusting the user-side voltage, when the user-side reactive voltage deviation meets the conditions of the second adjustment method, the line termination regulator fine-tunes it, and finally adjusts the voltage deviation to the second adjustment threshold, which is a voltage deviation value suitable for sensitive users and meets the needs of users who are sensitive to line voltage. Furthermore, for voltage-sensitive users, when the user-side reactive voltage deviation is small, the second adjustment method is met, and the line termination regulator directly fine-tunes it, adjusting the voltage deviation to the second adjustment threshold. For users who are not sensitive to voltage, when the reactive voltage deviation on the user side is large, the conditions of the first adjustment method are met, and adjustment is made by the substation side adjustment device to adjust the voltage deviation to the set first adjustment threshold, which is a voltage deviation value suitable for users who are not sensitive to line voltage and meets the needs of users who are not sensitive to line voltage.

[0055] Step S4: The voltage deviation on the user side after adjustment is judged as acceptable, and the group adjustment is repeated until the voltage deviation is judged as acceptable. Specifically, After adjusting the reactive voltage of the user side by the first adjusting method or the second adjusting method, the control center obtains the adjusted reactive voltage of the user side in real time, calculates the voltage deviation, and judges the voltage deviation as acceptable; Presetting a sensitive voltage deviation range and an insensitive voltage deviation range; Determining whether the adjusted voltage deviation of the voltage-sensitive user is within the sensitive voltage deviation range, and if so, terminating the adjustment; if not, returning to step S2 and repeating the group adjustment; and determining whether the adjusted voltage deviation of the user who is not sensitive to voltage is within the insensitive voltage deviation range, and if so, terminating the adjustment; if not, returning to step S2 and repeating the grouping adjustment.

[0056] In this embodiment, a sensitive voltage deviation range and a non-sensitive voltage deviation range are set to compare and determine the user-side voltage deviation after adjustment. For sensitive users, the voltage deviation must be stable at ±0.5%, and the sensitive voltage deviation range is preferably set to [±0.1%, ±0.5%]. The lower limit of this range can be changed according to requirements, but the voltage deviation is typically within ±0.5%. For non-sensitive users, the voltage deviation must be stable between ±2% and ±3%, and the non-sensitive voltage deviation range is preferably set to [±2%, ±3%]. Depending on the user type, the system determines whether the user-side voltage deviation after adjustment falls within the corresponding voltage deviation range. If it does not fall within the corresponding voltage deviation range, a warning is issued. Steps S2 to S4 are repeated to adjust the user-side reactive power until the voltage deviation is adjusted to the appropriate deviation range. If it falls within the corresponding voltage deviation range, the system terminates the adjustment.

[0057] In this embodiment, the method receives user-side voltage information in real time, calculates user-side reactive voltage deviations based on the voltage information, and controls the line termination regulator and the substation-side regulator to adjust the user-side reactive voltages and reduce the reactive voltage deviations. After calculating the user-side reactive voltage deviations, the voltage sensitivity types of the users are analyzed, and the user-side reactive voltages are grouped and adjusted based on the users' voltage sensitivity types. In the grouping adjustment method, voltage-sensitive users are sequentially adjusted by the substation-side regulator and the line termination regulator. When the user-side reactive voltage deviation is large, the substation-side regulator first roughly adjusts the user-side reactive voltage, then the line termination regulator finely adjusts the user-side reactive voltage, and finally adjusts to an appropriate reactive voltage value. The voltage deviation is within an appropriate range, meeting the needs of users who are sensitive to line voltage. When the user-side reactive voltage deviation is small, the line termination regulator directly and precisely adjusts the reactive voltage. For users who are not sensitive to voltage, the reactive voltage is adjusted by the substation-side regulator so that the voltage deviation is adjusted to an appropriate voltage deviation value, thereby meeting the line voltage needs of users who are not sensitive to voltage. The present invention uses a group adjustment method to combine the substation-side regulator and the line termination regulator to adjust the user-side reactive voltage in stages. When a user has high requirements for line voltage and the reactive power adjustment by the substation-side regulator still does not meet the user's line voltage needs, the line termination regulator is adjusted in real time through the WAPI network to adjust the voltage more precisely, meeting the voltage needs of users with different requirements, and ensuring that the input power of each user at the line termination is within a reasonable range.

[0058] The method of this embodiment will be explained below with reference to an example, where the first adjustment threshold is set to ±3%, the second adjustment threshold is set to ±0.5%, the sensitive voltage deviation ranges are set to [0.1%, 0.5%] and [-0.5%, -0.1%], and the insensitive voltage deviation ranges are set to [2%, 3%] and [-3%, -2%].

[0059] Detects the user's voltage in real time, calculates the reactive voltage deviation, If the user detects a large reactive voltage deviation, for example, ±7%, and the user is not sensitive, the voltage deviation exceeds the first adjustment threshold, and the control center controls the substation-side regulator to roughly adjust the voltage to ±2%, and the adjusted voltage deviation is within the non-sensitive voltage deviation range, and the adjustment is terminated. If the user is sensitive, the voltage deviation exceeds the first adjustment threshold, and the control center controls the substation-side regulator to roughly adjust the voltage to ±2%, and the voltage deviation is not within the sensitive voltage deviation range, and the control center returns to step S2 to determine whether the voltage deviation is between ±3% and ±0.5%, and the conditions for the second adjustment method are met. The line termination regulator is controlled to precisely adjust the voltage to ±0.5%, and the voltage deviation is within the sensitive voltage deviation range, and the adjustment is terminated.

[0060] When the user detects that the reactive voltage deviation on the user side is small, for example, ±3%, if the user is not sensitive, the voltage deviation is below the first adjustment threshold, no adjustment is made, the voltage deviation is judged as pass, the voltage deviation is within the insensitive voltage deviation range, and the adjustment is terminated; if the user is sensitive, the voltage deviation is between ±3% and ±0.5%, which satisfies the conditions of the second adjustment method, and the line termination adjustment device is controlled to precisely adjust the voltage, adjusting the voltage deviation to ±0.5%, and at this time, the voltage deviation is within the sensitive voltage deviation range, and the adjustment is terminated.

[0061] The specific embodiments described herein are merely illustrative of the spirit of the present invention, and those skilled in the art may make various modifications, additions, or substitutions in a similar manner to the specific embodiments described, without departing from the spirit of the present invention or beyond the scope defined in the appended claims.

[0062] In this specification, terms such as power grid control side, reactive power adjustment terminal side, control center, WAPI network control master station, AS identification server, AC controller, etc. are often used, but the use of other terms is not excluded. These terms are merely used to more conveniently explain and interpret the essence of the present invention, and interpreting them as any additional restrictions would be contrary to the spirit of the present invention.

[0063] (Appendix 1) A method for coordinating a power distribution terminal communication network based on WAPI, comprising: Step S1: detecting the voltage on the user side in real time; Step S2 of analyzing the type of voltage sensitivity for the user; Step S3: grouping and adjusting reactive voltages on the user side according to the type of voltage sensitivity of the user; and step S4 of determining whether the voltage deviation on the user side after adjustment is acceptable, and repeating the group adjustment until the voltage deviation is acceptable.

[0064] (Appendix 2) The step of analyzing the type of voltage sensitivity of the user specifically includes: The method for adjusting a power distribution terminal communication network based on WAPI described in Appendix 1, characterized in that it includes a step of marking a user's sensitive type in advance and obtaining the user's sensitive type information based on the sensitive type mark.

[0065] (Appendix 3) The step of grouping and adjusting the reactive voltage deviations of the users according to the types of voltage sensitivity of the users specifically includes: if the user is a voltage-sensitive user, adjusting the reactive voltage at the user side by sequentially using the first adjusting method and the second adjusting method; The method for adjusting a distribution terminal communication network based on WAPI described in Appendix 1, further comprising the step of adjusting the reactive voltage at the user side using a first adjustment method if the user is a user who is not voltage sensitive.

[0066] (Appendix 4) The first adjusting method is specifically: setting a first adjustment threshold; The method for adjusting a power distribution terminal communication network based on WAPI described in Appendix 3, characterized in that it includes a step of determining whether a reactive voltage deviation on the user side exceeds a first adjustment threshold, and if so, adjusting the reactive voltage so that the voltage deviation is adjusted to the first adjustment threshold, and if not, not making any adjustment, wherein the first adjustment threshold is a voltage deviation value suitable for a non-sensitive user.

[0067] (Appendix 5) The second adjusting method is specifically: setting a second adjustment threshold; The method for adjusting a power distribution terminal communication network based on WAPI described in Appendix 4, characterized in that it includes a step of determining whether a reactive voltage deviation on the user side is between a second adjustment threshold and the first adjustment threshold, and if so, adjusting the reactive voltage so that the voltage deviation is adjusted to the second adjustment threshold, and if not, not making any adjustment, wherein the second adjustment threshold is a voltage deviation value suitable for sensitive users.

[0068] (Appendix 6) Mark the input reactive power regulators, including the substation regulator and the line termination regulator; The first adjustment method includes obtaining a corresponding substation-side adjustment device on a user side, and using the substation-side adjustment device to adjust the reactive voltage; The adjustment method for a power distribution terminal communication network based on WAPI described in Appendix 5, characterized in that the second adjustment method includes a step of obtaining a corresponding line termination adjustment device on the user side and using the line termination adjustment device to perform reactive voltage adjustment.

[0069] (Appendix 7) Specifically, step S4 is setting a sensitive voltage deviation range and an insensitive voltage deviation range; Determining whether the adjusted voltage deviation of the voltage-sensitive user is within the sensitive voltage deviation range, and if so, terminating the adjustment; if not, returning to step S2 and repeating the group adjustment; and (c) determining whether the adjusted voltage deviation of a user who is not sensitive to voltage is within a non-sensitive voltage deviation range, and if so, terminating the adjustment; and if not, returning to step S2 and repeating the grouping adjustment.

[0070] (Appendix 8) The step of analyzing the type of voltage sensitivity for the user includes: If the user does not have a sensitive type mark, obtaining a history power supply record of the user and setting the sensitive type of the user based on the history power supply record; If the user does not have a history power supply record, determine whether the user's reactive power adjusting device is connected to the reactive power adjusting terminal side, and if so, proceed to the next step for determination; if not, set the user as not sensitive to voltage; determining whether the user is an industrial user or a general user, and if the user is a general user, setting the user as a user who is not sensitive to voltage, and if the user is an industrial user, proceeding to the next step to determine; and (c) acquiring a user's industry code, determining whether the user belongs to a set voltage-sensitive industry, and if so, setting the user as a voltage-sensitive user, or if not, setting the user as a voltage-insensitive user.

[0071] (Appendix 9) A power distribution terminal communication network system based on WAPI that implements the method described in any one of Supplementary Notes 1 to 8, comprising: a power grid control side and a reactive power adjustment terminal side, the power grid control side including a control center and a WAPI network control main station, the reactive power adjustment terminal side including a reactive power adjustment device, a wireless terminal access device, a wireless access point, and a switch, the reactive power adjustment device including a line termination adjustment device and a substation side adjustment device, the line termination adjustment device is connected to the wireless terminal access device, the wireless terminal access device is wirelessly connected to the wireless access point, the wireless access point is connected to the switch, the control center and the WAPI network control main station are connected to the switch via a network, and the substation side adjustment device is connected to the control center via the network; A WAPI-based power distribution terminal communication network system characterized in that the control center selects a line termination adjustment device or a substation side adjustment device to adjust the voltage according to the voltage deviation situation on the user side.

[0072] (Appendix 10) The WAPI-based power distribution terminal communication network system described in Appendix 9 is characterized in that the WAPI network control main station includes an AS identification server and an AC controller, the AS identification server and the AC controller are connected to the reactive power adjustment terminal side via a network, and the reactive power adjustment terminal side further includes a voltage detection unit, which is connected to the point where the electric meter enters the network, and the voltage detection unit is connected to the control center via the network to detect the voltage on the user side. [Explanation of symbols]

[0073] 1. Power grid control side 2 Reactive power adjustment terminal side 11 Control Center 12 WAPI network control station 121 AS Identification Server 122 AC controller 21 Line termination adjustment device 22 Substation side adjustment device 23 Wireless terminal access device 24 wireless access points.

Claims

1. A method for coordinating a power distribution terminal communication network based on WAPI, comprising: Step S1: detecting the voltage on the user side in real time; Step S2 of analyzing the type of voltage sensitivity for the user; Step S3: grouping and adjusting reactive voltages on the user side according to the type of voltage sensitivity of the user; and step S4 of determining whether the voltage deviation on the user side after adjustment is acceptable, and repeating the group adjustment until the voltage deviation is acceptable.

2. The step of analyzing the type of voltage sensitivity of the user specifically includes: The method for adjusting a power distribution terminal communication network based on WAPI according to claim 1, further comprising the steps of: marking a user's sensitive type in advance; and obtaining the user's sensitive type information based on the sensitive type mark.

3. The step of grouping and adjusting the reactive voltage deviations of the users according to the types of voltage sensitivity of the users specifically includes: if the user is a voltage-sensitive user, adjusting the reactive voltage at the user side by sequentially using the first adjusting method and the second adjusting method; 2. The method for adjusting a WAPI-based power distribution terminal communication network according to claim 1, further comprising the step of adjusting the reactive voltage at the user side using a first adjustment method if the user is a voltage-insensitive user.

4. Specifically, the first adjustment method includes: setting a first adjustment threshold; 4. The method for adjusting a power distribution terminal communication network based on WAPI according to claim 3, further comprising the steps of: determining whether a reactive voltage deviation at a user side exceeds a first adjustment threshold; if so, adjusting the reactive voltage so that the voltage deviation is adjusted to the first adjustment threshold; if not, not adjusting the reactive voltage, wherein the first adjustment threshold is a voltage deviation value suitable for a non-sensitive user.

5. Specifically, the second adjustment method is as follows: setting a second adjustment threshold; 5. The method for adjusting a power distribution terminal communication network based on WAPI according to claim 4, further comprising the steps of: determining whether a reactive voltage deviation at a user side is between a second adjustment threshold and a first adjustment threshold; if so, adjusting the reactive voltage so that the voltage deviation is adjusted to the second adjustment threshold; if not, not adjusting the reactive voltage, wherein the second adjustment threshold is a voltage deviation value suitable for sensitive users.

6. Mark the input reactive power regulators, including the substation regulator and the line termination regulator; The first adjustment method includes a step of obtaining a corresponding substation-side adjustment device on a user side and performing reactive voltage adjustment using the substation-side adjustment device; 6. The adjustment method for a power distribution terminal communication network based on WAPI according to claim 5, wherein the second adjustment method includes a step of obtaining a corresponding line termination adjustment device on the user side and using the line termination adjustment device to perform reactive voltage adjustment.

7. Specifically, step S4 is setting a sensitive voltage deviation range and an insensitive voltage deviation range; Determining whether the adjusted voltage deviation of the voltage-sensitive user is within the sensitive voltage deviation range, and if so, terminating the adjustment; if not, returning to step S2 and repeating the grouping adjustment; and determining whether the adjusted voltage deviation of the user who is not sensitive to voltage is within the insensitive voltage deviation range, and if so, terminating the adjustment; and if not, returning to step S2 and repeating the grouping adjustment.

8. The step of analyzing the type of voltage sensitivity for the user includes: If the user does not have a sensitive type mark, obtaining a history power supply record of the user and setting the sensitive type of the user based on the history power supply record; If the user does not have a history power supply record, determine whether the user's reactive power adjusting device is connected to the reactive power adjusting terminal side, and if so, proceed to the next step for determination; if not, set the user as not sensitive to voltage; determining whether the user is an industrial user or a general user, and if the user is a general user, setting the user as a user who is not sensitive to voltage, and if the user is an industrial user, proceeding to the next step to determine; 3. The method for adjusting a power distribution terminal communication network based on WAPI according to claim 2, further comprising the steps of: acquiring a user's industry code; determining whether the user belongs to a set voltage-sensitive industry; and if so, setting the user as a voltage-sensitive user; and if not, setting the user as a voltage-insensitive user.

9. A power distribution terminal communication network system based on WAPI that implements the method according to any one of claims 1 to 8, comprising: a power grid control side and a reactive power adjustment terminal side, the power grid control side comprising a control center and a WAPI network control master station, the reactive power adjustment terminal side comprising a reactive power adjustment device, a wireless terminal access device, a wireless access point, and a switch, the reactive power adjustment device comprising a line termination adjustment device and a substation side adjustment device, the line termination adjustment device being connected to the wireless terminal access device, the wireless terminal access device being wirelessly connected to the wireless access point, the wireless access point being connected to the switch, the control center and the WAPI network control master station being connected to the switch via a network, and the substation side adjustment device being connected to the control center via the network; A WAPI-based power distribution terminal communication network system, characterized in that the control center selects a line termination adjustment device or a substation side adjustment device to adjust the voltage according to the voltage deviation situation on the user side.

10. 10. The WAPI-based power distribution terminal communication network system of claim 9, wherein the WAPI network control master station includes an AS identification server and an AC controller, the AS identification server and the AC controller are connected to the reactive power adjustment terminal side via a network, and the reactive power adjustment terminal side further includes a voltage detection unit, the voltage detection unit is connected to the point where the electric meter enters the network, and the voltage detection unit is connected to the control center via the network to detect the voltage on the user side.

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