Method, system, storage medium and computing device for PMU to realize closed-loop control

Abstract

The present invention discloses a method, system, storage medium and computing device for PMU to realize closed-loop control. The DWAMS master station of the present invention determines whether the local device is allowed to be opened or closed according to conditions such as phase measurement information, transient steady-state recording information, switch quantity information, analog quantity information, etc. The SCADA master station sends a control command to the PMU through the DWAMS master station to realize remote control, and the PMU feeds back the operation information to the DWAMS master station and the SCADA master station to form closed-loop control.

Description

Technical Field

[0001] The invention relates to a method, system, storage medium and computing equipment for realizing closed-loop control of a PMU, and belongs to the technical field of power system and automation thereof. Background Art

[0002] As the scale of towns and industrial electricity consumption expands, the scale of distribution networks also expands accordingly. The access of new power sources and loads such as distributed power sources, power electronic equipment, interactive loads, electric vehicles, etc. has expanded the original single-power radial structure into a multi-power ring network structure. The distribution network has become more complex, and higher requirements have been placed on its global monitoring management and coordinated control.

[0003] Currently, synchronized phasor measurement units (PMUs) are used in distribution networks to collect phasor measurement information, but the PMU and the master station are not able to achieve closed-loop control. Summary of the invention

[0004] The present invention provides a method, system, storage medium and computing device for realizing closed-loop control of a PMU, which solves the problems disclosed in the background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The method of PMU to achieve closed-loop control includes:

[0007] According to the preset protocol, receive the phase measurement information, transient and steady state recording information, switch quantity information and analog quantity information collected by PMU;

[0008] According to the phase measurement information, transient and steady state recording information, switch quantity information and analog quantity information, determine whether the local device is allowed to be opened or closed;

[0009] If the local device allows the opening and closing operation, a permission command is sent to the SCADA master station; wherein the permission command is a command to allow the opening and closing operation of the local device;

[0010] If a control command fed back by the SCADA master station is received, the control command is sent to the PMU; wherein the control command is a local device control command generated according to the permission command;

[0011] If the operation information fed back by the PMU is received, the operation information is sent to the SCADA master station; wherein the operation information is the local device control operation information generated according to the control command.

[0012] The default protocol is the improved GB / T 26865.2-2011. Based on GB / T 26865.2-2011, the uploading of phase measurement information and operation information is added.

[0013] The improvements of GB / T 26865.2-2011 are as follows:

[0014] In the transmission frame SYNC field, a transmission frame type of an application extension frame is added;

[0015] The application extension frame uses the application service data unit structure to transmit phase measurement information and operation information.

[0016] The PMU implements a closed-loop control system, including:

[0017] Measurement receiving module: according to the preset protocol, receives the phase measurement information, transient and steady-state recording information, switch quantity information and analog quantity information collected by PMU;

[0018] Judgment module: judge whether the local device is allowed to open or close operation according to the phase measurement information, transient and steady state recording information, switch quantity information and analog quantity information;

[0019] Permission command sending module: If the local device allows the opening and closing operation, the permission command will be sent to the SCADA master station;

[0020] Control command sending module: if a control command fed back by the SCADA master station is received, the control command is sent to the PMU; wherein the control command is a local device control command generated according to the permission command;

[0021] Operation information forwarding module: if the operation information fed back by the PMU is received, the operation information is sent to the SCADA master station; wherein the operation information is the local device control operation information generated according to the control command.

[0022] The default protocol is the improved GB / T 26865.2-2011. Based on GB / T 26865.2-2011, the uploading of phase measurement information and operation information is added.

[0023] The improvements of GB / T 26865.2-2011 are as follows:

[0024] In the transmission frame SYNC field, a transmission frame type of an application extension frame is added;

[0025] The application extension frame uses the application service data unit structure to transmit phase measurement information and operation information.

[0026] The method of PMU to achieve closed-loop control includes:

[0027] Receive the permission command sent by the DWAMS master station; wherein the permission command is a command to allow the local device to open and close operations;

[0028] Generate a control command according to the permission command, and feed the control command back to the DWAMS master station; wherein the control command is a local device control command generated according to the permission command;

[0029] Receive the operation information sent by the DWAMS master station; wherein the operation information is the local device control operation information generated according to the control command.

[0030] The PMU implements a closed-loop control system, including:

[0031] Permission command receiving module: receiving the permission command sent by the DWAMS master station; wherein the permission command is a command to allow the local device to open and close operations;

[0032] Control command generation module: generates control commands according to the permission command, and feeds back the control commands to the DWAMS master station; wherein the control commands are local device control commands generated according to the permission command;

[0033] Operation information receiving module: receives the operation information sent by the DWAMS master station; wherein the operation information is the local device control operation information generated according to the control command.

[0034] A computer-readable storage medium storing one or more programs, wherein the one or more programs include instructions, and when the instructions are executed by a computing device, the computing device executes a method for implementing closed-loop control of a PMU.

[0035] A computing device includes one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and are configured to be executed by the one or more processors, and the one or more programs include instructions for executing a method for implementing closed-loop control by a PMU.

[0036] The beneficial effects achieved by the present invention are as follows: the DWAMS master station of the present invention determines whether the local device is allowed to be opened or closed according to the phase measurement information, the SCADA master station sends a control command to the PMU through the DWAMS master station to realize remote control, and the PMU feeds back the operation information to the DWAMS master station and the SCADA master station to form a closed-loop control. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flow chart of the method of the present invention;

[0038] Figure 2 This is the communication structure diagram between PMU and master station;

[0039] Figure 3 It is the basic structure of the transmission frame;

[0040] Figure 4Specified for variable structural qualifiers. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0042] like Figure 1 As shown, the methods for PMU to realize closed-loop control include DWAMS master station method and SCADA master station method;

[0043] The DWAMS master station method includes the following steps:

[0044] Step 1, according to the preset protocol, receiving the phase measurement information, transient and steady state recording information, switch quantity information and analog quantity information collected by the PMU;

[0045] Step 2, judging whether the local device is allowed to be opened or closed according to the phase measurement information, transient and steady state recording information, switch quantity information and analog quantity information;

[0046] Step 3: If the local device allows the opening and closing operation, a permission command is sent to the SCADA master station; wherein the permission command is a command to allow the opening and closing operation of the local device;

[0047] Step 4: If a control command fed back by the SCADA master station is received, the control command is sent to the PMU; wherein the control command is a local device control command generated according to the permission command;

[0048] Step 5: If the operation information fed back by the PMU is received, the operation information is sent to the SCADA master station; wherein the operation information is the local device control operation information generated according to the control command.

[0049] The SCADA master station method includes the following steps:

[0050] S1) receiving the permission command sent by the DWAMS master station; wherein the permission command is a command to allow the local device to open and close operations;

[0051] S2) generating a control command according to the permission command, and feeding back the control command to the DWAMS master station; wherein the control command is a local device control command generated according to the permission command;

[0052] S3) receiving the operation information sent by the DWAMS master station; wherein the operation information is the local device control operation information generated according to the control command.

[0053] In the above method, the DWAMS master station method is applied on the DWAMS master station side, and the SCADA master station method is applied on the SCADA master station side, wherein the DWAMS master station determines whether the local device is allowed to be opened or closed according to the phase measurement information, and the SCADA master station sends a control command to the PMU through the DWAMS master station to realize remote control, and the PMU feeds back the operation information to the DWAMS master station and the SCADA master station to form a closed-loop control.

[0054] by Figure 2 Taking the communication structure shown as an example, it includes PMU, safety isolation layer, master station front-end processor, DWAMS master station and SCADA master station. PMU is connected to the safety isolation layer through optical fiber or wireless, the safety isolation layer is connected to the master station front-end processor, the DWAMS master station is connected to the master station front-end processor, and the SCADA master station is connected to the DWAMS master station.

[0055] In order to realize information exchange and collaborative control between PMU and DWAMS master station and SCADA master station, it is necessary to configure communication protocol between PMU and DWAMS master station to transmit phase measurement information, transient and steady-state recording information, switch quantity information, analog quantity information and operation information.

[0056] PMU and DWAMS master station cannot use the standard GB / T 26865.2-2011, and it is necessary to make some improvements to the protocol, that is, to use the improved GB / T 26865.2-2011. Specifically, on the basis of GB / T 26865.2-2011, add the phasor measurement information and operation information to be sent.

[0057] The specific improvements are as follows:

[0058] 1) In the transmission frame SYNC field, add a transmission frame type of application extension frame;

[0059] 2) The application extension frame uses the application service data unit structure to transmit phase measurement information and operation information; the application service data unit is the application service data unit of IEC60870-5-101 / 104.

[0060] Therefore, the specific contents of the agreement are as follows:

[0061] 1. Transmission frame format definition

[0062] Real-time data transmission follows the basic format of GB / T-26865.2-2011. The basic structure of the transmission frame is as follows: Figure 3 As shown, the definition of the transmission frame SYNC field (synchronization field) is shown in Table 1; a transmission frame type called application extension frame is added, and bit6-bit4 of the SYNC synchronization field of the application extension frame is defined as 101, which is transmitted through the management pipeline. The specific definition content is shown in Table 2.

[0063] Table 1 Transmission frame byte definition

[0064]

[0065]

[0066] Table 2 Application extension frame format

[0067] 1 SYNC 2 2 FRAMESIZE 2 3 IDCODE 8 4 SOC 4 5 Type Identification 1 6 Variable structural qualifiers 1 7 Transmission reason 2 8 Public Address 2 9 Information body address 3 10 Information body elements 11 CHK 1

[0068] 2. Application Protocol Data Unit

[0069] An ASDU consists of a data unit identifier and one or more information objects.

[0070] The data unit identifier has the same structure in all ASDUs, and the information objects in an ASDU have the same structure and type, which are defined by the type identifier field.

[0071] The structure of the data unit identifier is as follows:

[0072] A. Type identifier, one octet;

[0073] B, variable structural qualifier, one octet;

[0074] C. Transmission reason, two octets;

[0075] D. Application service data unit public address (i.e., the public address in Table 2), two octets.

[0076] The number of octets of the public address of the ASDU is determined by system parameters and can be one or two octets. The time stamp (if present) belongs to a single information object and is in the 7-byte CP56Time2a format.

[0077] An information object consists of an information object identifier (if present), a set of information elements and an information object timestamp (if present); wherein the information object identifier consists only of the information object address; a set of information elements can be a single information element, a set of comprehensive elements or a sequential element.

[0078] The type identifier defines the structure, type and format of the information object; all information objects in an application service data unit have the same structure, type and format.

[0079] 2.1 Application message type

[0080] Application function type for monitoring direction:

[0081]

[0082]

[0083] Process information for controlling direction:

[0084] Type identifier: =UI8[1..8]<45..69>;

[0085] CON <45> ∶=single command C_SC_NA_1;

[0086] CON <46> ∶=Dual command C_DC_NA_1;

[0087] System information in control direction:

[0088] Type identifier: =UI8[1..8]<100..109>;

[0089] CON <100> ∶=General call command C_IC_NA_1.

[0090] 2.2 Variable Structural Determiners

[0091] In the ASDU, the second octet of the data unit identifier is defined as a variable structure qualifier, as specified below: Figure 4 shown.

[0092] Variable structure qualifier domain value semantics definition:

[0093] Variable structure qualifier = VARIABLE STRUCTURE Qualifier: = CP8{number, SQ};

[0094] number=N=number:=UI7[1..7]<0..127>;

[0095] <0> :=ASDU does not contain information object;

[0096] <1..127>: = number of ASDU information elements (single information element or combination of similar information elements);

[0097] SQ = single or sequential: = BS1[8]<0..1>;

[0098] <0> : = addressing a single information element or a collection of information elements in many information objects of the same type;

[0099] <1> := addresses a homogeneous set of sequential single information elements in a single information object of an ASDU;

[0100] SQ <0> and N<0..127>:=number of information objects i;

[0101] SQ <1> and N<0..127>:=number j of information elements of a single object or sets of information elements in each ASDU;

[0102] The SQ bits specify the method of addressing subsequent information objects or single information elements / sets of information elements.

[0103] SQ∶=0 Single information element or set of information elements addressed by information object address. Application service data unit can be composed of one or more information objects of the same type. Number N is a binary number, which defines the number of information objects.

[0104] SQ∶=1 A sequence of single information elements or sets of the same type of information elements (i.e., measured values ​​of the same format) is addressed by an information object address (see 5.1.5 in IEC 60870-5-3). The information object address is the address of the first information element or set of sequential single information elements or sets of information elements. The addresses of subsequent single information elements or sets of information elements are incremented by 1 from this address. The number N is a binary number that defines the number of single information elements or sets of information elements. In the case of sequential single information elements or sets of information elements, only one information object is arranged per application service data unit. (SQ=1 must be used when answering general calls and group calls, and SQ=1 or SQ=0 can be used depending on the specific situation when transmitting variable quantities).

[0105] 2.3 Application Service Data Unit Public Address

[0106] The public address of the application service data unit is 2 bytes, and the high byte is fixed to 0.

[0107] 2.4 Reasons for transmission

[0108] <1> ∶=period, cycle (telemetry and telesignaling data are sent periodically) per / cyc;

[0109] <3> : = burst (spontaneous) (telemetry and telesignaling data burst uploading) spont;

[0110] <6> ∶=Activate (the master station sends general call and remote control commands) act;

[0111] <7> ∶=Activation confirmation (the lower computer confirms and responds to the general call and remote control command. A negative response generally replies with 0x47. If the remote control is not activated after selection and is selected again, the remote control state is wrong at this time, and a negative response should be replied) actcon;

[0112] <8> ∶=Stop activation (the master station sends a remote control cancellation command) deact;

[0113] <9> : = Stop activation confirmation (lower computer confirms response to remote control cancellation command) deactcon;

[0114] <10> : =Activation termination (send the general call end and remote control execution end command to the lower computer) actterm;

[0115] <44> := unknown type identifier;

[0116] <45> :=Unknown reason for transmission;

[0117] <46> :=Unknown ASDU public address;

[0118] <47> :=Unknown information object address.

[0119] 2.5 Application Function Message Structure

[0120] Application function type for monitoring direction:

[0121] Type ID: =UI8[1..8]<0..44>

[0122]

[0123] Based on the above protocol, the PMU will send the collected phasor measurement information, transient and steady-state recording information, switch quantity information and analog quantity information to the DWAMS master station; the DWAMS master station determines whether the local device is allowed to be opened and closed, and whether the local device (generally the local switch) is allowed to be opened and closed according to the phasor measurement information, transient and steady-state recording information, switch quantity information and analog quantity information. Among them, the phasor measurement information is used to determine whether the two sides of the local device are in the synchronous closing state, the transient and steady-state recording information is used to determine whether the local device is in normal working condition, and the switch quantity information and analog quantity information are used to determine whether the local device is allowed to be closed. The real-time status of the local device is disconnected and used for auxiliary judgment after the operation command; based on the above conditions, it is judged whether the local device allows the opening and closing operation; if the local device allows the opening and closing operation, the permission command is sent to the SCADA master station, and the SCADA master station generates a control command according to the permission command, and feeds the control command back to the DWAMS master station, and sends the control command to the PMU through the DWAMS master station. The PMU controls the local device according to the control command and feeds back the operation information to the DWAMS master station. The DWAMS master station also feeds back the operation information to the SCADA master station to form a closed-loop control.

[0124] The above method realizes the functional integration of PMU and distribution terminal. Compared with the protection configuration method of traditional distribution system, it has the advantages of expanding the use function of distribution network terminal, saving space and reducing investment, thus having high application value.

[0125] The software system corresponding to the above method, that is, the system for PMU to realize closed-loop control, includes a DWAMS master station system and a SCADA master station system.

[0126] The DWAMS master station system is loaded in the DWAMS master station and includes:

[0127] Measurement receiving module: according to the preset protocol, receives the phase measurement information, transient and steady-state recording information, switch quantity information and analog quantity information collected by PMU;

[0128] The default protocol is the improved GB / T 26865.2-2011. Based on GB / T 26865.2-2011, the uploading of phase measurement information and operation information is added.

[0129] The improvements of GB / T 26865.2-2011 are as follows:

[0130] In the transmission frame SYNC field, a transmission frame type of an application extension frame is added;

[0131] The application extension frame uses the application service data unit structure to transmit phase measurement information and operation information.

[0132] Judgment module: judge whether the local device allows opening and closing operations based on phase measurement information, transient and steady-state recording information, switch quantity information and analog quantity information.

[0133] Allow command sending module: If the local device allows the opening and closing operation, the allow command will be sent to the SCADA master station.

[0134] Control command sending module: if a control command fed back by the SCADA master station is received, the control command is sent to the PMU; wherein the control command is a local device control command generated according to the permission command.

[0135] Operation information forwarding module: if the operation information fed back by the PMU is received, the operation information is sent to the SCADA master station; wherein the operation information is the local device control operation information generated according to the control command.

[0136] The SCADA master station system is loaded in the SCADA master station, including:

[0137] Permission command receiving module: receives the permission command sent by the DWAMS master station; wherein the permission command is a command to allow the local device to open and close operations.

[0138] Control command generation module: generates control commands according to permission commands, and feeds back the control commands to the DWAMS master station; wherein the control commands are local device control commands generated according to the permission commands.

[0139] Operation information receiving module: receives the operation information sent by the DWAMS master station; wherein the operation information is the local device control operation information generated according to the control command.

[0140] A computer-readable storage medium storing one or more programs, wherein the one or more programs include instructions, and when the instructions are executed by a computing device, the computing device executes a method for implementing closed-loop control of a PMU.

[0141] A computing device includes one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and are configured to be executed by the one or more processors, and the one or more programs include instructions for executing a method for implementing closed-loop control by a PMU.

[0142] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0143] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0144] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0145] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0146] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A method for PMU to implement closed-loop control, characterized in that: Including DWAMS master station method and SCADA master station method; The DWAMS master station methods include: According to the preset protocol, receive the phase measurement information, transient and steady state recording information, switch quantity information and analog quantity information collected by PMU; According to the phase measurement information, transient and steady state recording information, switch quantity information and analog quantity information, determine whether the local device is allowed to be opened or closed; If the local device allows the opening and closing operation, a permission command is sent to the SCADA master station; wherein the permission command is a command to allow the opening and closing operation of the local device; If a control command fed back by the SCADA master station is received, the control command is sent to the PMU; wherein the control command is a local device control command generated by the SCADA master station according to the permission command; If the operation information fed back by the PMU is received, the operation information is sent to the SCADA master station; wherein the operation information is the local device control operation information generated by the PMU according to the control command; SCADA master station methods include: Receive the permission command sent by the DWAMS master station; Generate a control command according to the permission command, and feed the control command back to the DWAMS master station; wherein the control command is a local device control command generated according to the permission command; Receive operation information sent by DWAMS master station.

2. The method for implementing closed-loop control of a PMU according to claim 1, characterized in that: In the DWAMS master station method, the preset protocol is the improved GB / T 26865.2-2011. The improved GB / T 26865.2-2011 adds phase measurement information and operation information to GB / T 26865.2-2011.

3. The method for implementing closed-loop control of a PMU according to claim 2, characterized in that: The improvements of GB / T 26865.2-2011 are as follows: In the transmission frame SYNC field, a transmission frame type of an application extension frame is added; The application extension frame uses the application service data unit structure to transmit phase measurement information and operation information.

4. The PMU realizes the closed-loop control system, characterized in that: DWAMS master station system and SCADA master station system; The DWAMS master station system includes: Measurement receiving module: according to the preset protocol, receives the phase measurement information, transient and steady-state recording information, switch quantity information and analog quantity information collected by PMU; Judgment module: judge whether the local device is allowed to open or close operation according to the phase measurement information, transient and steady state recording information, switch quantity information and analog quantity information; Permission command sending module: If the local device allows the opening and closing operation, the permission command will be sent to the SCADA master station; Control command sending module: if a control command fed back by the SCADA master station is received, the control command is sent to the PMU; wherein the control command is a local device control command generated by the SCADA master station according to the permission command; Operation information forwarding module: if the operation information fed back by PMU is received, the operation information is sent to the SCADA master station; wherein the operation information is the local device control operation information generated by PMU according to the control command; The SCADA master station system includes: Permission command receiving module: receives the permission command sent by the DWAMS master station; Control command generation module: generates control commands according to the permission command, and feeds back the control commands to the DWAMS master station; wherein the control commands are local device control commands generated according to the permission command; Operation information receiving module: receives the operation information sent by the DWAMS master station.

5. The system for implementing closed-loop control of PMU according to claim 4, characterized in that: In the DWAMS master station system, the preset protocol is the improved GB / T 26865.2-2011. The improved GB / T 26865.2-2011 adds phase measurement information and operation information to GB / T 26865.2-2011.

6. The system for implementing closed-loop control of PMU according to claim 5, characterized in that: The improvements of GB / T 26865.2-2011 are as follows: In the transmission frame SYNC field, a transmission frame type of an application extension frame is added; The application extension frame uses the application service data unit structure to transmit phase measurement information and operation information.

7. A computer-readable storage medium storing one or more programs, characterized in that: The one or more programs include instructions, which, when executed by a computing device, cause the computing device to perform any one of the methods according to claims 1 to 3.

8. A computing device, characterized in that include: One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories, the one or more programs are configured to be executed by the one or more processors, and the one or more programs include instructions for executing any of the methods according to claims 1 to 3.

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