Safety verification method and system for multi-stage collaborative reactive voltage control instruction

Abstract

The invention relates to the technical field of electric power, and discloses a safety verification method and system for a multi-stage collaborative reactive voltage control instruction, and the method comprises the steps: a master station synchronously issues a current-period instruction of a coordination gateway and a reactive instruction reference value to a substation; the substation receives the instruction of the coordination gateway in the current period and a reactive instruction reference value, performs multiple verification, and assigns an instruction return value according to a verification result; and the substation sends the instruction return value to the master station, and the master station completes receiving, judges and outputs a judgment result. According to the method, a safety verification mechanism for bidirectional interaction of the multistage cooperative reactive voltage control system can be established, so that the global coordinated optimization level of wide-area dispersed reactive devices of a multistage scheduling mechanism is improved, and safe and stable operation of a power grid is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to a safety verification method and system for multi-level coordinated reactive voltage control instructions. Background Art

[0002] With the development of new power systems, the proportion of clean energy such as wind power and solar energy connected to the grid has continued to increase, the volatility of the reactive load of the power grid has increased, and a large number of reactive currents have accumulated, causing voltage control problems. The traditional reactive voltage control principle of "layered zoning, and local balance" can no longer meet the voltage regulation requirements. In order to better improve the global coordination and optimization level of widely dispersed reactive devices, multi-level reactive voltage collaborative control technology has been widely used between dispatching agencies at different levels, such as provinces, cities, and counties. Multi-level reactive voltage collaborative control is generally carried out by the upper-level dispatching control system as the master station and the lower-level dispatching control system as the substation. The master station and the substation agree on the coordination gateway. The master station sends the adjustment command after global optimization calculation. For example, the gateway should increase / decrease the reactive output. After receiving the command, the substation calculates and forms a strategy, such as switching capacitors, increasing or decreasing the reactive output of generators, etc., to respond to the command adjustment requirements, ensure high-quality power supply at each voltage level, and improve the voltage level of the entire network. The overall process is as follows: Figure 1 shown.

[0003] Currently, there is a lack of a complete safety verification mechanism for collaborative control instructions, and there are certain safety risks, such as the lack of judgment on the timeliness of instructions when the upper and lower communication links are interrupted, the incompatibility of instructions due to deviations in measurement and collection between the master station and the substation, and the lack of a feedback mechanism when the substation fails the instruction verification. As the demand for safe and stable operation of the power grid continues to increase, the erroneous execution of collaborative reactive power control instructions will cause voltage exceeding the limit, fluctuation or oscillation, and increased network losses, which will increase adverse consequences and threaten the safety of the power grid. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] In view of the above existing problems, the present invention is proposed. Therefore, the present invention provides a safety verification method for multi-level coordinated reactive power voltage control instructions to solve the above problems.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a safety verification method for a multi-level coordinated reactive voltage control instruction, comprising:

[0008] The master station will coordinate the gateway's current cycle instructions and reactive power instruction reference values ​​and send them to the substations synchronously;

[0009] The substation receives the coordination gateway's current cycle instruction and reactive power instruction reference value, performs multiple checks, and assigns the instruction return value according to the check results;

[0010] The slave station sends the command return value to the master station, and the master station completes reception and makes a judgment, and determines whether the verification is passed based on the judgment result.

[0011] As a preferred solution of the safety verification method of the multi-level coordinated reactive voltage control instruction of the present invention, the coordination gateway current cycle instruction and reactive instruction reference value include:

[0012] Convert the coordination gate's current cycle instruction into a coding value δ, expressed as:

[0013] δ=YMDhmsσΔq

[0014] Wherein, δ represents the instruction code value, Y represents the current year, M represents the current month, D represents the current day, h represents the current hour, m represents the current minute, s represents the current second, σ represents the regulation direction, and Δq represents the reactive regulation amount;

[0015] The reactive power command reference value Q r The current reactive power output of the coordination gateway collected in this cycle is sent to the substation synchronously with the coding value δ.

[0016] As a preferred solution of the safety verification method of the multi-level coordinated reactive voltage control instruction of the present invention, wherein: the substation receives the coordination gateway current cycle instruction and the reactive instruction reference value, and performs multiple verifications including:

[0017] The substation receives the reactive power instruction code value δ and the reactive power instruction reference value Q r , calculating the measurement difference, and performing a measurement consistency check to determine whether the measurement consistency check passes;

[0018] The substation decodes the instruction code δ, performs instruction time validity verification, and determines whether the instruction time validity verification passes;

[0019] The substation performs an adjustment direction validity check to determine whether the adjustment direction validity check passes;

[0020] The substation calculates the reactive adjustable amount at the gateway, performs reactive adjustment verification, and determines whether the reactive adjustment verification passes;

[0021] The substation calculates the current voltage status of the coordination gateway, performs voltage status verification, and determines whether the voltage status verification passes;

[0022] If all checks in the above steps are passed, the instruction is determined to have passed the check, and the instruction returns the value C. r =δ.

[0023] As a preferred solution of the safety verification method for the multi-level coordinated reactive voltage control instruction of the present invention, the measurement consistency verification includes:

[0024] According to the reactive power command reference value Q r , calculate the measurement difference Diff, expressed as:

[0025]

[0026] Among them, Q represents the current reactive power output of the coordination gateway collected by the substation in this cycle;

[0027] Based on the measurement difference Diff, the substation performs measurement consistency check and sets the measurement difference threshold D. If Diff≥D, the substation determines that the measurement consistency check fails and returns the value C to the command. r Assignment.

[0028] As a preferred solution of the safety verification method of the multi-level coordinated reactive voltage control instruction of the present invention, the verification of the validity of the instruction time includes:

[0029] The substation decodes the instruction code δ and extracts the data of year Y, month M, day D, hour h, minute m, second s, adjustment direction σ and adjustment amount Δq;

[0030] The substation performs command time validity check, sets the time deviation threshold value T, compares the year, month, day, hour, minute, and second data with the current time, and if the deviation from the current time exceeds the time deviation threshold value T, the command time validity check is determined to have failed, and the command return value C is r Assignment.

[0031] As a preferred solution of the safety verification method of the multi-level coordinated reactive voltage control instruction of the present invention, the reactive regulation amount verification includes:

[0032] The substation calculates the adjustable reactive power at the gateway. Centered on the coordination gateway, it aggregates the static and dynamic reactive power compensation equipment of the gateway's subordinate substations based on the grid topology. Based on the adjustable direction of reactive power resources, it calculates the reactive power that can be increased and decreased.

[0033] According to the increaseable reactive power, the decreaseable reactive power and the command reactive power adjustment value Δq, the reactive power adjustment value is checked. If the following relationship is satisfied, the command verification is judged to be failed, which is expressed as:

[0034]

[0035] According to the value of the adjustment direction σ, the command return value C r Assignment.

[0036] As a preferred solution of the safety verification method for the multi-level coordinated reactive voltage control instruction of the present invention, the method of determining whether the verification is passed according to the judgment result includes:

[0037] The slave station returns the command value C r Sent to the master station, when C r When ≠δ, the master determines that the instruction of this cycle is abnormal and no longer calculates the collaborative control instruction of the next cycle. The value sent down remains the most recent instruction code δ and reference value Q r ;

[0038] When C r =δ, the master determines that the instruction of this cycle is normal and continues to issue the instruction of the next cycle.

[0039] In a second aspect, the present invention provides a safety verification system for multi-level coordinated reactive power and voltage control instructions, comprising:

[0040] The instruction module is used by the master station to synchronously send the coordination gateway's current cycle instructions and reactive power instruction reference values ​​to the substation;

[0041] The verification module is used for the substation to receive the coordination gateway's current cycle instruction and reactive power instruction reference value, perform multiple verifications, and assign the instruction return value according to the verification results;

[0042] The judgment module is used for the slave station to send the instruction return value to the master station, and the master station completes the reception and makes a judgment, and determines whether the verification is passed according to the judgment result.

[0043] As a preferred solution of the safety verification system for the multi-level coordinated reactive voltage control instruction of the present invention, the instruction module includes:

[0044] The coordination gate current cycle instruction is converted into a code value δ, which is expressed as:

[0045] δ=YMDhmsσΔq

[0046] Wherein, δ represents the instruction code value, Y represents the current year, M represents the current month, D represents the current day, h represents the current hour, m represents the current minute, s represents the current second, σ represents the regulation direction, and Δq represents the reactive regulation amount;

[0047] The reactive power command reference value Q r The current reactive power output of the coordination gateway collected in this cycle is sent to the substation synchronously with the coding value δ.

[0048] As a preferred solution of the safety verification system for the multi-level coordinated reactive voltage control instruction of the present invention, the verification module includes:

[0049] The substation receives the reactive power instruction code value δ and the reactive power instruction reference value Q r , calculating the measurement difference, and performing a measurement consistency check to determine whether the measurement consistency check passes;

[0050] The substation decodes the instruction code δ, performs instruction time validity verification, and determines whether the instruction time validity verification passes;

[0051] The substation performs an adjustment direction validity check to determine whether the adjustment direction validity check passes;

[0052] The substation calculates the reactive adjustable amount at the gateway, performs reactive adjustment verification, and determines whether the reactive adjustment verification passes;

[0053] The substation calculates the current voltage status of the coordination gateway, performs voltage status verification, and determines whether the voltage status verification passes;

[0054] If all checks in the above steps are passed, the instruction is determined to have passed the check, and the instruction returns the value C. r =δ.

[0055] The measurement consistency check includes:

[0056] According to the reactive power command reference value Q r , calculate the measurement difference Diff, expressed as:

[0057]

[0058] Among them, Q represents the current reactive power output of the coordination gateway collected by the substation in this cycle;

[0059] Based on the measurement difference Diff, the substation performs measurement consistency check and sets the measurement difference threshold D. If Diff≥D, the substation determines that the measurement consistency check fails and returns the value C to the command. r Assignment.

[0060] The instruction time validity check includes:

[0061] The substation decodes the instruction code δ and extracts the data of year Y, month M, day D, hour h, minute m, second s, adjustment direction σ and adjustment amount Δq;

[0062] The substation performs command time validity check, sets the time deviation threshold value T, compares the year, month, day, hour, minute, and second data with the current time, and if the deviation from the current time exceeds the time deviation threshold value T, the command time validity check is determined to have failed, and the command return value C is r Assignment.

[0063] The reactive regulation amount verification includes:

[0064] The substation calculates the adjustable reactive power at the gateway. Centered on the coordination gateway, it aggregates the static and dynamic reactive power compensation equipment of the gateway's subordinate substations based on the grid topology. Based on the adjustable direction of reactive power resources, it calculates the reactive power that can be increased and decreased.

[0065] According to the increaseable reactive power, the decreaseable reactive power and the command reactive power adjustment value Δq, the reactive power adjustment value is checked. If the following relationship is satisfied, the command verification is judged to be failed, which is expressed as:

[0066]

[0067] According to the value of the adjustment direction σ, the command return value C r Assignment.

[0068] As a preferred solution of the safety verification system for the multi-level coordinated reactive voltage control instruction of the present invention, the determination module includes:

[0069] The slave station returns the command value C r Sent to the master station, when C r When ≠δ, the master determines that the instruction of this cycle is abnormal and no longer calculates the collaborative control instruction of the next cycle. The value sent down remains the most recent instruction code δ and reference value Q r ;

[0070] When C r =δ, the master determines that the instruction of this cycle is normal and continues to issue the instruction of the next cycle.

[0071] In a third aspect, the present invention provides an electronic device, comprising:

[0072] memory and processor;

[0073] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the safety verification method of the multi-level coordinated reactive voltage control instructions are implemented.

[0074] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the safety verification method of the multi-level coordinated reactive voltage control instructions.

[0075] Compared with the prior art, the present invention has the following beneficial effects: the present invention performs multiple checks based on the coordination gateway's current cycle instructions and reactive instruction reference values, and determines whether the check is passed through the instruction return value, which is conducive to establishing a two-way interactive safety verification mechanism for multi-level collaborative reactive voltage control, avoiding or reducing the adverse effects of upper-level erroneous instructions on the safe and stable operation of lower-level power grids, and at the same time increasing the accuracy and availability of upper-level instructions through a two-way interactive mechanism, effectively improving the global coordination and optimization level of widely dispersed reactive devices in multi-level dispatching organizations, and ensuring safe and stable operation of power grids. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0077] Figure 1 This is a schematic diagram of the multi-level coordinated reactive power control process of the present invention;

[0078] Figure 2 This is a schematic diagram of the overall flow of a method for safety verification of multi-level coordinated reactive voltage control instructions according to an embodiment of the present invention. DETAILED DESCRIPTION

[0079] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0080] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0081] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0082] The present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0083] In the description of the present invention, it should be noted that the terms "upper, lower, inner, and outer" and other references to orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0084] In this disclosure, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, removable, or integral connections. They may also refer to mechanical, electrical, or direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure.

[0085] Reference Figure 2 , as one embodiment of the present invention, provides a safety verification method for a multi-level coordinated reactive power voltage control instruction, comprising:

[0086] S100, the master station coordinates the gateway's current cycle instructions and reactive power instruction reference values ​​and sends them to the slave station synchronously;

[0087] S200, the substation receives the coordination gateway's current cycle instruction and reactive power instruction reference value, performs multiple checks, and assigns the instruction return value based on the check results;

[0088] S300, the slave station sends the command return value to the master station, and the master station completes the reception and makes a judgment, and determines whether the verification is passed according to the judgment result.

[0089] It should be noted that in this embodiment, the master station refers to the reactive voltage control function or module in the upper-level power grid dispatching system, the coordination gateway refers to the reactive voltage control node agreed upon by the upper and lower power grids, such as the high-voltage side bus or main transformer of the hub substation, and the substation refers to the reactive voltage control function or module in the lower-level power grid dispatching system.

[0090] In step S100, in a preferred embodiment, coordinating the gateway current cycle instruction and reactive power instruction reference value includes:

[0091] Convert the coordination gate's current cycle instruction into a coding value δ, expressed as:

[0092] δ=YMDhmsσΔq

[0093] Wherein, δ represents the instruction code value, Y represents the current year, formatted as a four-digit integer, M represents the current month, formatted as a two-digit integer, D represents the current day, formatted as a two-digit integer, h represents the current hour, formatted as a two-digit integer, value ranges from 0 to 23, m represents the current minute, formatted as a two-digit integer, s represents the current second, formatted as a two-digit integer, σ represents the regulation direction, 0 represents no regulation, 1 represents reactive power reduction, and 2 represents reactive power increase, Δq represents the reactive power regulation amount, formatted as a three-digit integer + two decimal places, in megavars (MVar), with zeros added if the number of decimal places is insufficient.

[0094] The master station increases the reactive power command reference value Q r , reactive power command reference value Q r The current reactive power output of the coordination gateway collected in this period is in megavars (MVar) and is sent to the substation synchronously with the coding value δ.

[0095] In step S200, in a preferred embodiment, the substation receives the coordination gateway current cycle instruction and reactive power instruction reference value, and performs multiple checks including:

[0096] Step 1: The substation receives the reactive power instruction code value δ and the reactive power instruction reference value Q r , calculate the measurement difference, and perform measurement consistency verification to determine whether the measurement consistency verification passes;

[0097] Step 2: The slave station decodes the instruction code δ, performs instruction time validity verification, and determines whether the instruction time validity verification passes;

[0098] Step 3: The substation performs adjustment direction validity verification to determine whether the adjustment direction validity verification passes;

[0099] Step 4: The substation calculates the reactive power adjustable quantity at the gateway, performs reactive power adjustment verification, and determines whether the reactive power adjustment verification passes.

[0100] Step 5: The substation calculates the current voltage status of the coordinated gateway, conducts a voltage status check, and determines whether the voltage status check passes.

[0101] If all the above checks from Step 1 to Step 5 pass, it is determined that the instruction check passes, and the instruction return value C r = δ.

[0102] In a preferred implementation, performing the measurement consistency check includes:

[0103] Based on the reactive power instruction reference value Q r , calculate the measurement difference Diff, expressed as:

[0104]

[0105] where Q represents the current reactive power output of the coordinated gateway collected by the substation in this cycle, in megavars (MVar);

[0106] Based on the measurement difference Diff, the substation conducts a measurement consistency check, sets the measurement difference threshold D. If Diff ≥ D, it is determined that the measurement consistency check fails, and the instruction return value C r is assigned a value.

[0107] Specifically, if Diff ≥ D, it is determined that the measurement consistency check fails, and the instruction return value C r is assigned the value 1111; if Diff < D, it is determined that the measurement consistency check passes, and the instruction check in the next Step 2 is carried out.

[0108] In a preferred implementation, performing the instruction time validity check includes:

[0109] The substation decodes the instruction code δ to extract the data of year Y, month M, day D, hour h, minute m, second s, regulation direction σ, and regulation amount Δq;

[0110] The substation conducts an instruction time validity check, sets the time deviation threshold T, compares the year, month, day, hour, minute, and second data with the current time. If the deviation from the current time exceeds the time deviation threshold T, it is determined that the instruction time validity check fails, and the instruction return value C r is assigned a value. [[ID=4​​​​​​​​​​​​​​​-m×10 6 -s×10 4 -σ

[0114] ×10 3

[0115] If the decoded data and the current time deviate beyond the time deviation threshold T, the command time validity check is judged to have failed, and the command return value C is r Assign 2222; if the deviation between the decoded data and the current time does not exceed the time deviation threshold value T, then the instruction time validity check is judged to be passed, and the next step three instruction verification is performed.

[0116] In a preferred embodiment, performing adjustment direction validity verification includes:

[0117] The substation performs the adjustment direction validity check, checks the adjustment direction σ, if the adjustment direction value is not 0 or 1 or 2, it is determined that the adjustment direction validity check fails, and the instruction return value C r Assign 3333; if the value of the adjustment direction is 0, 1, or 2, it is determined that the adjustment direction validity check has passed, and the next step four instruction check is performed.

[0118] In a preferred embodiment, performing reactive regulation verification includes:

[0119] The substation calculates the adjustable reactive power at the gateway. Centered on the coordination gateway, it aggregates the static and dynamic reactive power compensation equipment of the gateway's subordinate substations based on the grid topology. Based on the adjustable direction of reactive power resources, it calculates the reactive power that can be increased and decreased.

[0120] According to the increaseable reactive power, the decreaseable reactive power and the command reactive power adjustment value Δq, the reactive power adjustment value is checked. If the following relationship is satisfied, the reactive power adjustment value check is judged to have failed, which is expressed as:

[0121]

[0122] According to the value of the adjustment direction σ, the command return value C r Assignment.

[0123] Specifically, if the above relationship is satisfied, it is determined that the reactive power adjustment value verification fails. When σ=2, the instruction return value C r Assign value 4444, when σ=1, the instruction returns value C r Assign 5555, when σ=0, the instruction returns the value C r Assign value 6666;

[0124] If the above relationship is not satisfied, it is determined that the reactive power regulation verification has passed, and the next step five instruction verification is performed.

[0125] It should be noted that static reactive power compensation equipment includes capacitors and reactors, and dynamic reactive power compensation equipment includes SVC / SVG, generator sets, UPFC, flexible loads and other equipment, while excluding uncontrollable equipment such as power outages, maintenance, and failures.

[0126] In an optional embodiment, the statistically increased reactive power Q inc , can reduce reactive power Q dec , expressed in megavars (MVar) or kilovars (KVar), as:

[0127]

[0128] in, Static reactive power can be increased, such as shunt capacitors in hot standby state, shunt reactors in operation, etc. dup is the number of statically addable reactive devices, It is the dynamic reactive capacity that can be increased, such as the reactive increment of dispatchable resources such as SVC / SVG, generator sets, UPFC, and flexible loads, n cup is the number of dynamically addable reactive power devices, n dup,lk 、n cup,lk The numbers of uncontrollable discrete and continuously increaseable reactive devices are respectively, that is, in the prohibited control state such as power outage, maintenance, fault, etc. Static reactive power can be reduced, such as in-service shunt capacitors, hot standby shunt reactors, etc. ddn is the number of statically reducible reactive power devices, is the dynamic reactive power reduction capacity, n cdn is the number of dynamically reducible reactive power devices, n ddn,lk 、n cdn,lk They are the number of uncontrollable static and dynamic reactive power devices that can be reduced respectively.

[0129] In a preferred embodiment, calculating the current voltage state of the coordination gateway includes:

[0130] Set the voltage upper limit Vmax, voltage lower limit Vmin, coordinate the current voltage state V st Expressed as:

[0131]

[0132] Where V is the current voltage value.

[0133] The substation performs voltage status verification and checks the voltage status according to the current voltage status V st And the instruction adjustment direction σ, if the following relationship is satisfied, the instruction verification is judged to be failed:

[0134]

[0135] When σ=2, the instruction returns the value C r Assign value 7777, when σ=1, the instruction returns value C r Assign value 8888;

[0136] If the above relationship is not satisfied, it is determined that the voltage status check has passed.

[0137] In step S300, in a preferred embodiment, determining whether the verification is passed according to the determination result includes:

[0138] The slave station returns the command value C r Sent to the master station, when C r When ≠δ, the master determines that the instruction of this cycle is abnormal and no longer calculates the collaborative control instruction of the next cycle. The value sent down remains the most recent instruction code δ and reference value Q r ;

[0139] When C r =δ, the master determines that the instruction of this cycle is normal and continues to issue the instruction of the next cycle.

[0140] It should be noted that the present invention is conducive to establishing a bidirectional interactive safety verification mechanism for a multi-level collaborative reactive voltage control system, so as to improve the global coordination and optimization level of the widely dispersed reactive devices of the multi-level dispatching organization and ensure the safe and stable operation of the power grid.

[0141] The above is a schematic scheme of a safety verification method for a multi-level coordinated reactive voltage control instruction in this embodiment. It should be noted that the technical solution of the safety verification system for the multi-level coordinated reactive voltage control instruction and the technical solution of the safety verification method for the multi-level coordinated reactive voltage control instruction are of the same concept. For details not described in detail in the technical solution of the safety verification system for the multi-level coordinated reactive voltage control instruction in this embodiment, please refer to the description of the technical solution of the safety verification method for the multi-level coordinated reactive voltage control instruction.

[0142] The safety verification system for multi-level coordinated reactive power and voltage control instructions in this embodiment includes:

[0143] The instruction module is used by the master station to synchronously send the coordination gateway's current cycle instructions and reactive power instruction reference values ​​to the substation;

[0144] The verification module is used for the substation to receive the coordination gateway's current cycle instructions and reactive power instruction reference values, perform multiple verifications, and assign instruction return values ​​based on the verification results;

[0145] The judgment module is used for the slave station to send the instruction return value to the master station. The master station completes the reception and makes a judgment, and determines whether the verification is passed based on the judgment result.

[0146] Preferably, the instruction module includes:

[0147] The coordination gate current cycle instruction is converted into a code value δ, which is expressed as:

[0148] δ=YMDhmsσΔq

[0149] Wherein, δ represents the instruction code value, Y represents the current year, M represents the current month, D represents the current day, h represents the current hour, m represents the current minute, s represents the current second, σ represents the regulation direction, and Δq represents the reactive regulation amount;

[0150] The reactive power command reference value Q r The current reactive power output of the coordination gateway collected in this cycle is sent to the substation synchronously with the coding value δ.

[0151] Preferably, the verification module includes:

[0152] The substation receives the reactive power instruction code value δ and the reactive power instruction reference value Q r , calculating the measurement difference, and performing a measurement consistency check to determine whether the measurement consistency check passes;

[0153] The substation decodes the instruction code δ, performs instruction time validity verification, and determines whether the instruction time validity verification passes;

[0154] The substation performs an adjustment direction validity check to determine whether the adjustment direction validity check passes;

[0155] The substation calculates the reactive adjustable amount at the gateway, performs reactive adjustment verification, and determines whether the reactive adjustment verification passes;

[0156] The substation calculates the current voltage status of the coordination gateway, performs voltage status verification, and determines whether the voltage status verification passes;

[0157] If all checks in the above steps are passed, the instruction is determined to have passed the check, and the instruction returns the value C. r =δ.

[0158] Among them, measurement consistency verification includes:

[0159] According to the reactive power command reference value Q r , calculate the measurement difference Diff, expressed as:

[0160]

[0161] Among them, Q represents the current reactive power output of the coordination gateway collected by the substation in this cycle;

[0162] Based on the measurement difference Diff, the substation performs measurement consistency check and sets the measurement difference threshold D. If Diff≥D, the substation determines that the measurement consistency check fails and returns the value C to the command. r Assignment.

[0163] The validity check of the instruction time includes:

[0164] The substation decodes the instruction code δ and extracts the data of year Y, month M, day D, hour h, minute m, second s, adjustment direction σ and adjustment amount Δq;

[0165] The substation performs command time validity check, sets the time deviation threshold value T, compares the year, month, day, hour, minute, and second data with the current time, and if the deviation from the current time exceeds the time deviation threshold value T, the command time validity check is determined to have failed, and the command return value C is r Assignment.

[0166] Adjustment direction validity check includes:

[0167] The substation performs the adjustment direction validity check, checks the adjustment direction σ, if the adjustment direction value is not 0 or 1 or 2, it is determined that the adjustment direction validity check fails, and the instruction return value C r Assign 3333; if the value of the adjustment direction is 0, 1, or 2, it is determined that the adjustment direction validity check has passed, and the next step four instruction check is performed.

[0168] Reactive power regulation verification includes:

[0169] The substation calculates the adjustable reactive power at the gateway. Centered on the coordination gateway, it aggregates the static and dynamic reactive power compensation equipment of the gateway's subordinate substations based on the grid topology. Based on the adjustable direction of reactive power resources, it calculates the reactive power that can be increased and decreased.

[0170] According to the increaseable reactive power, the decreaseable reactive power and the command reactive power adjustment value Δq, the reactive power adjustment value is checked. If the following relationship is satisfied, the command verification is judged to be failed, which is expressed as:

[0171]

[0172] According to the value of the adjustment direction σ, the command return value C r Assignment.

[0173] Voltage status verification includes:

[0174] Set the voltage upper limit Vmax and voltage lower limit Vmin, calculate the current voltage state V of the coordination gateway st ;

[0175] According to the current voltage state Vst And the instruction adjustment direction σ, if the following relationship is satisfied, the instruction verification is judged to be unsuccessful, and the instruction return value C r Assignment, expressed as:

[0176]

[0177] The judgment module includes:

[0178] The slave station returns the command value C r Sent to the master station, when C r When ≠δ, the master determines that the instruction of this cycle is abnormal and no longer calculates the collaborative control instruction of the next cycle. The value sent down remains the most recent instruction code δ and reference value Q r ;

[0179] When C r =δ, the master determines that the instruction of this cycle is normal and continues to issue the instruction of the next cycle.

[0180] This embodiment further provides an electronic device suitable for safety verification of multi-level coordinated reactive power and voltage control instructions, including:

[0181] Memory and processor; the memory is used to store computer-executable instructions, and the processor is used to execute computer-executable instructions to implement the safety verification method for implementing multi-level coordinated reactive voltage control instructions as proposed in the above embodiment.

[0182] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the method for implementing the safety verification of multi-level coordinated reactive voltage control instructions proposed in the above embodiment is implemented.

[0183] The storage medium proposed in this embodiment and the safety verification method for implementing multi-level coordinated reactive voltage control instructions proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0184] Through the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented with the help of software and necessary general-purpose hardware, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a computer's floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various embodiments of the present invention.

[0185] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A safety verification method for multi-level coordinated reactive voltage control instructions, characterized in that: include: The master station will coordinate the gateway's current cycle instructions and reactive power instruction reference values ​​and send them to the substation synchronously; The substation receives the coordination gateway's current cycle instruction and reactive power instruction reference value, performs multiple checks, and assigns the instruction return value according to the check result; The slave station sends the command return value to the master station, and the master station completes reception and makes a determination, and determines whether the verification is passed according to the determination result.

2. The safety verification method for multi-level coordinated reactive voltage control instructions according to claim 1, characterized in that: The coordination gateway current cycle instruction and reactive power instruction reference value include: The coordination gate current cycle instruction is converted into a code value δ, which is expressed as: δ=YMDhmsσΔq Among them, δ represents the instruction code value, Y represents the current year, M represents the current month, D represents the current day, h represents the current hour, m represents the current minute, s represents the current second, σ represents the adjustment direction, and Δq represents the reactive adjustment amount; The reactive power command reference value Q r The current reactive power output of the coordination gateway collected in this cycle is sent to the substation synchronously with the coding value δ.

3. The safety verification method for multi-level coordinated reactive voltage control instructions according to claim 2, characterized in that: The substation receives the coordination gateway's current cycle instruction and reactive power instruction reference value, and performs multiple checks including: The substation receives the reactive power instruction code value δ and the reactive power instruction reference value Q r , calculate the measurement difference, and perform a measurement consistency check to determine whether the measurement consistency check passes; The substation decodes the instruction code δ, performs instruction time validity check, and determines whether the instruction time validity check passes; The substation performs an adjustment direction validity check to determine whether the adjustment direction validity check passes; The substation calculates the reactive adjustable amount at the gateway, performs reactive adjustment verification, and determines whether the reactive adjustment verification passes; The substation calculates the current voltage state of the coordination gateway, performs voltage state verification, and determines whether the voltage state verification passes; If all checks in the above steps are passed, the instruction is judged to have passed the check, and the instruction returns the value C. r =δ.

4. The safety verification method for multi-level coordinated reactive voltage control instructions according to claim 3 is characterized in that: The measurement consistency check comprises: According to the reactive power command reference value Q r , calculate the measurement difference Diff, expressed as: Among them, Q represents the current reactive power output of the coordination gateway collected by the substation in this period; Based on the measurement difference Diff, the slave station performs a measurement consistency check and sets a measurement difference threshold D. If Diff ≥ D, the measurement consistency check is determined to be unsuccessful and the command return value C is returned. r Assignment.

5. The safety verification method for multi-level coordinated reactive voltage control instructions according to claim 3 is characterized in that: The instruction time validity check comprises: The substation decodes the instruction code δ and extracts the data of year Y, month M, day D, hour h, minute m, second s, adjustment direction σ and adjustment amount Δq; The substation performs the command time validity check, sets the time deviation threshold value T, and compares the year, month, day, hour, minute, and second data with the current time. If the deviation from the current time exceeds the time deviation threshold value T, the command time validity check is determined to have failed, and the command return value C is r Assignment.

6. The safety verification method for multi-level coordinated reactive voltage control instructions according to claim 3, characterized in that: The reactive power regulation amount verification comprises: The substation calculates the adjustable reactive power at the gateway. With the coordination gateway as the center, it collects the static reactive power compensation equipment and dynamic reactive power compensation equipment of the gateway's subordinate substations according to the topological connection relationship of the power grid. According to the adjustable direction of reactive power resources, it counts the reactive power that can be increased and the reactive power that can be decreased. According to the increaseable reactive power, the decreaseable reactive power and the command reactive power adjustment value Δq, the reactive power adjustment value is checked. If the following relationship is satisfied, the command check is judged to be unsuccessful, which is expressed as: According to the value of the adjustment direction σ, the command return value C r Assignment.

7. The safety verification method for the multi-level coordinated reactive voltage control instruction according to any one of claims 3 to 6, characterized in that: Determining whether the verification is passed according to the determination result includes: The slave station returns the command value C r Sent to the master station, when C r ≠δ, the master determines that the instruction of this cycle is abnormal, and no longer calculates the cooperative control instruction of the next cycle. The value sent down remains the most recent instruction code δ and reference value Q r ; When C r =δ, the master determines that the instruction of this cycle is normal and continues to issue the instruction of the next cycle.

8. A safety verification system for multi-level coordinated reactive voltage control instructions, characterized in that: include, The command module is used by the master station to synchronously send the coordination gateway current cycle command and reactive power command reference value to the substation; A verification module is used for the substation to receive the coordination gateway current cycle instruction and reactive power instruction reference value, and perform multiple verifications, and assign the instruction return value according to the verification result; The determination module is used for the substation to send the instruction return value to the main station, and the main station completes the reception and makes a determination, and determines whether the verification is passed according to the determination result.

9. The safety verification system for multi-level coordinated reactive voltage control instructions according to claim 8, characterized in that: The instruction module comprises: The coordination gate current cycle instruction is converted into a code value δ, which is expressed as: δ=YMDhmsσΔq Among them, δ represents the instruction code value, Y represents the current year, M represents the current month, D represents the current day, h represents the current hour, m represents the current minute, s represents the current second, σ represents the adjustment direction, and Δq represents the reactive adjustment amount; The reactive power command reference value Q r The current reactive power output of the coordination gateway collected in this cycle is sent to the substation synchronously with the coding value δ.

10. The safety verification system for multi-level coordinated reactive voltage control instructions according to claim 9, characterized in that: The verification module comprises: The substation receives the reactive power instruction code value δ and the reactive power instruction reference value Q r , calculate the measurement difference, and perform a measurement consistency check to determine whether the measurement consistency check passes; The substation decodes the instruction code δ, performs instruction time validity check, and determines whether the instruction time validity check passes; The substation performs an adjustment direction validity check to determine whether the adjustment direction validity check passes; The substation calculates the reactive adjustable amount at the gateway, performs reactive adjustment verification, and determines whether the reactive adjustment verification passes; The substation calculates the current voltage state of the coordination gateway, performs voltage state verification, and determines whether the voltage state verification passes; If all checks in the above steps are passed, the instruction is judged to have passed the check, and the instruction returns the value C. r =δ.

Images