CN112653124B - Equipment overload real-time control method considering manual handling time limit and operation trend - Google Patents

Equipment overload real-time control method considering manual handling time limit and operation trend Download PDF

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CN112653124B
CN112653124B CN202011239175.XA CN202011239175A CN112653124B CN 112653124 B CN112653124 B CN 112653124B CN 202011239175 A CN202011239175 A CN 202011239175A CN 112653124 B CN112653124 B CN 112653124B
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time
active
power
measure
overload
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CN112653124A (en
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徐泰山
鲍颜红
徐伟
杨君军
许晓彤
项中明
孙维真
张静
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State Grid Zhejiang Electric Power Co Ltd
NARI Group Corp
Nari Technology Co Ltd
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State Grid Zhejiang Electric Power Co Ltd
NARI Group Corp
Nari Technology Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/58—The condition being electrical
    • H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

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  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a real-time control method for equipment overload considering manual handling time limit and operation trend, which determines equipment needing overload real-time control when the safe operation tolerance time is less than the manual handling time limit according to the characteristic of the overload tolerance time of the equipment; rejecting invalid candidate measures according to the active sensitivity and the adjustable direction of the candidate measures to the overload real-time control equipment; introducing an optimal measure execution time maximum value as a variable, establishing an optimization model with a minimum control cost as a target, considering that the optimal measure adjustment quantity meets the requirements of adjustment speed and adjustable space, the optimal implementation execution time is not more than the execution time maximum value, and the optimal measure execution completion time is based on real-time plan and load ultra-short term prediction, the power grid active power balance, the overload monitoring equipment safe operation tolerance time is not less than the manual handling time limit and the transmission channel active power non-crossing safety stability limit is taken as constraint conditions; and (4) obtaining a real-time control measure of equipment overload by solving the optimization model, and controlling the power grid in real time.

Description

Equipment overload real-time control method considering manual handling time limit and operation trend
Technical Field
The invention relates to a real-time equipment overload control method considering manual handling time limit and operation trend, and belongs to the technical field of power system operation and control.
Background
The utilization rate of the power transmission equipment is one of important indexes for evaluating the operation economy of the power grid, and in order to improve the operation economy of the power grid, the power transmission potential of the power grid needs to be fully excavated. The equipment overload is used as one of factors for restricting the power transmission capacity of the power grid, and in the online evaluation and real-time control of the equipment overload safety, how to comprehensively consider the current-carrying-time characteristic of the safe operation of the equipment, the scheduling manual handling time limit and the power grid operation trend are the key for fully exploiting the power transmission capacity of the power grid.
Under the current running state, the current of the equipment is controlled in real time according to the current limit not greater than the long-term current carrying limit. In fact, with the improvement of the technical level of dispatching automation, the precision, the real-time performance and the reliability of automatic control can support the control of the overload safe operation time of the equipment to be not less than the dispatching manual handling time limit by an automatic control means, so that the short-time overload capacity of the equipment can be fully utilized, and the economical efficiency of the operation of a power grid is correspondingly improved. Along with the improvement of scheduling real-time plan and ultra-short-term load prediction precision, the influence of the power grid operation trend on the safe operation time of equipment overload needs to be considered in the real-time control of equipment overload, so that the economic operation risk of over-control and the safe risk of under-control are avoided. Furthermore, the scheduling manual treatment time limit is not a constant time limit, but is related to both the number of measures and the execution time length of the manual treatment plan at the current time.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a real-time equipment overload control method considering manual handling time limit and operation trend, judges the safety of equipment overload according to the current-carrying-time characteristic of safe operation of the equipment at the current moment and the scheduling manual handling time limit, takes the operation trend of a power grid into consideration, takes the minimum control cost as a target, controls the safe operation duration of the equipment overload to be not less than the scheduling manual handling time limit, effectively improves the coordination level of automatic equipment overload control and manual handling, and fully utilizes the short-time overload capacity of the equipment on the premise of ensuring the safe operation of the power grid.
In order to achieve the above object, the present invention provides a real-time control method for equipment overload considering manual handling time limit and operation trend, comprising the following steps:
step 1: according to the current time t 0 Overload endurance time characteristics of each device in overload monitoring device set E, and determining each device in E and the overload endurance time characteristics at t 0 The safe operation tolerance time corresponding to the current of each device in the moment E is shorter than the device overload manual handling time limit t cr The equipment in the method is used as an overload real-time control equipment set F, if the F is not empty, the step 2 is carried out, otherwise, the method is ended;
step 2: obtaining t 0 An active power regulation measure set A and a device switching/quitting measure set B for real-time control of device overload in a power grid at any moment according to t 0 Identifying invalid measures for the active sensitivity of each measure in the moment A and the adjustable direction of each measure in the moment B to each device in the moment F, and removing the invalid measures from the moment A and the moment B;
and step 3: introducing a maximum value delta t of execution time length of each finally implemented measure as a variable, taking the minimum control cost as a target, considering the regulation speed and the adjustable space constraint of each active regulation measure regulating quantity in the step A to be finally implemented, taking the execution time length of the switching instruction of each equipment switching/switching measure in the step B to be finally implemented to be not more than the delta t constraint, and basing on (t) t 0 + delta t) time real-time planning and load ultra-short term prediction power grid active balance constraint, and (t) 0 + Δ t) time E the safe operation endurance time of each device is not less than t cr Constraint sum (t) 0 + delta t) time power transmission channel active power is not beyond safety and stability limit constraint, and an optimization model is constructed;
and 4, step 4: and (4) by solving an optimization model, taking the obtained regulating quantity of each active regulating measure in the step A and the switching instruction of each equipment switching/switching measure in the step B as finally implemented equipment overload real-time control measures, and carrying out real-time control on the power grid.
Preferably, in step 1, t 0 Overload endurance time characteristic of time of day deviceSex means at t 0 The equipment operates at constant current from t under the condition that the meteorological condition of the equipment is unchanged at the moment 0 And the corresponding relation between the current of the equipment and the corresponding safe operation endurance time obtained on the premise of continuous safe operation is started at the moment.
Preferably, in step 1, the manual handling time limit of the equipment overload refers to the requirement of power grid dispatching operation management regulation combined with t 0 The number of measures of the manual treatment plan and the execution time of each measure are set as the shortest time length for overload of the manual treatment equipment.
Preferably, in step 2, the active power regulation measure includes regulating the active power of the power plant, regulating the load active power, regulating the energy charging and discharging power and regulating the direct current power, and the equipment switching/disconnecting measure includes switching on and off of a line and switching on and off of a transformer.
Preferably, in step 2, the adjustable direction of the active adjustment measure is divided into 3 cases: 1) the adjustable direction of the measure that the active power can be increased and reduced is set to be an up direction and a down direction; 2) setting the adjustable direction of the active power only increasing measure as 1 direction; 3) setting the adjustable direction of active power only reducing measures as down-regulation 1 direction;
the equipment throwing/withdrawing measures comprise throwing measures and withdrawing measures, the adjustable direction of the throwing measures is set to be 1 direction which is upwards adjusted, and the adjustable direction of the withdrawing measures is set to be 1 direction which is downwards adjusted.
Preferably, in step 2, the method for identifying the invalid measure comprises the following steps:
and determining measures with absolute values of active sensitivity of all the devices in the F smaller than the threshold value of the active sensitivity as invalid measures, and determining measures with absolute values of active sensitivity of all the devices in the F smaller than the threshold value of the active sensitivity as invalid measures.
Preferably, in step 3, the optimization model is the following formula (1):
Figure BDA0002767796320000031
in the formula,. DELTA.P a The regulating variable, Δ P, for the active regulating measure a in A a Up-regulation to positive, Δ P a Down-regulation to negative, gamma a Is t 0 The cost of the unit adjustment quantity of the active adjustment measure a at the moment A;
Δk b the value of the throw/retreat instruction of the equipment throw/retreat measure B in the step B is 1, the throw/retreat instruction is input, the throw/retreat instruction is-1, the retreat is withdrawn, the throw/retreat instruction is 0, the t is kept 0 Constant on/off state at all times, gamma b Is at t 0 The cost of putting on/off the equipment in the step B;
P a.0 is at t 0 Active, P, of active regulating measure a at time A a.u Is (t) 0 + Δ t) moment A the upper active limit, P, of the active regulating measure a a.d Is (t) 0 + Δ t) the active lower limit of the active regulation measure a at time a;
v a.u is t 0 Unit active up-regulation degree, v, of active regulation measure a at time A a.d Is t 0 The unit active power down-regulation speed of the active power regulation measure a at the moment A;
k b.0 represents t 0 The on/off state of the equipment on/off measure B at the time B, when t 0 At the moment when the measure is in operation k b.0 Is set to 1 when t 0 At the moment when the measure is in the exit state k b.0 Set to 0;
f b (Δk b ) B, setting the execution time of the switching instruction of the switching measure B for the equipment in the B;
P cr is t of set 0 The active power balance deviation threshold value of the power grid at any moment, D is a direct current set of at least 1 converter station in the power grid, DN is a direct current set of all converter stations in the power grid, and P is the active power regulation measure of a power plant when the active power regulation measure a in A is the active power regulation measure of the power plant a.t Is (t) 0 + Δ t) the real-time power generation plan value for the measure, P when active regulation measure a in a is the load active regulation measure a.t Is (t) 0 + delta t) time active power regulation measure a corresponding ultra-short term load predictionValue P when control measure a in A is the charging and discharging power regulation measure of the energy storage power station a.t Is (t) 0 + delta t) time control measure a, and when the control measure a in A is a direct current power regulation measure, P a.t Is (t) 0 + delta t) time control measure a, G being t 0 Time of day power grid power generation set, P g.0 Is t 0 Active power of the power plant G at time G, P g.t Is (t) 0 + Δ t) active real time projected value of the power plant G at time G, L being t 0 Time of day grid load set, P l.0 Is t 0 Active, P, of load L in time L l.t Is (t) 0 + Δ t) ultra-short term load prediction value of load L at time L, GL being t 0 Time of day power grid energy storage power station set, P gl.0 Is t 0 Charging and discharging power of energy storage power station GL in time GL, P gl.t Is (t) 0 + Δ t) time GL in which the charging and discharging real-time plan value of energy storage power station GL is defined, DW is D in which the DC collection except DN is P d.0 Is t 0 Power of DC D at time D, P d.t Is (t) 0 + Δ t) time D the real-time planned value of the power of the direct current D, TL being t 0 External AC interconnection line set P of time power grid tl.0 Is t 0 Active power of external AC link TL in time TL, P tl.t Is (t) 0 + Δ t) the active real-time planned value of the external ac link TL at the time TL;
P e.t is (t) 0 + Δ t) time
Figure BDA0002767796320000041
Active, P, of medium overload monitoring equipment e e.0 Is t 0 Time of day
Figure BDA0002767796320000042
Active, s, of medium overload monitoring devices e e.a Is t 0 Active regulation measure a pair in time A
Figure BDA0002767796320000043
Active sensitivity of medium overload monitoring device e; when t is 0 Device in time BWhen the throw-in/retreat measure b is in the throw-in state s e.b Is t 0 Time equipment on/off measure b off pair
Figure BDA0002767796320000044
Active sensitivity of medium overload monitoring device e, when t 0 When the device entering/exiting measure B is in the exiting state at time B s e.b Is t 0 Time equipment throwing/withdrawing measure b throwing pair
Figure BDA0002767796320000045
Active sensitivity of medium overload monitoring device e; s e.g Is t 0 Active pair of power plant G at time G
Figure BDA0002767796320000046
Active sensitivity, s, of medium overload monitoring devices e e.l Is t 0 Active pair of load L in time L
Figure BDA0002767796320000047
Active sensitivity, s, of medium overload monitoring devices e e.gl Is t 0 Charging and discharging power pair of energy storage power station GL in time GL
Figure BDA0002767796320000048
Active sensitivity, s, of medium overload monitoring devices e e.d Is t 0 Power pair of direct current D in time D
Figure BDA0002767796320000049
Active sensitivity, s, of medium overload monitoring devices e e.tl Is t 0 Active pair of external tie-line TL in time TL
Figure BDA00027677963200000410
Active sensitivity of medium overload monitoring device e;
g e (P e.t ) Is according to t 0 Time of day
Figure BDA00027677963200000411
Overload of medium overload monitoring equipment eDetermination of load withstand time characteristic and current
Figure BDA00027677963200000412
Corresponding safe operation endurance time, wherein e.0 Is t 0 Time of day
Figure BDA0002767796320000051
Current of medium overload monitoring device e;
P f.t is (t) 0 Active power of the overload control device F at time F, + Δ t), P f.0 Is t 0 Active power s of overload control device F at time F f.a Is t 0 The active sensitivity of the active power regulation measure a to the overload control equipment F at the moment A; when t is 0 When the equipment on/off measure B is in the on state at the time B, s f.b Is t 0 At the moment, the measure is withdrawn from the active sensitivity to the overload control device F in F, and when t is 0 When the device entering/exiting measure B is in the exiting state at time B s f.b Is t 0 The active sensitivity of the equipment switching/tripping measure b to the overload control equipment F in the F at the moment; s f.g Is t 0 Active power of the power plant G at time G to active power sensitivity of the overload control device F at F, s f.l Is t 0 Active power of load L at time L to active power sensitivity, s, of overload control device F at time F f.gl Is t 0 Active sensitivity, s, of charging and discharging power of energy storage power station GL in time GL to overload control device F in F f.d Is t 0 Active sensitivity, s, of the power of the direct current D at the moment D to the overload control device F at F f.tl Is t 0 The active power of the external connecting line TL at the moment TL has active sensitivity to the F overload control device F;
g f (P f.t ) Is according to t 0 Determination of the overload withstand time characteristic of the overload control device F at the time F
Figure BDA0002767796320000052
Corresponding safe operation endurance time, wherein f.0 Is t 0 The current, beta, of the overload control device F at the time F f Is according to t 0 The higher the non-linear degree is, the larger the value is;
ST is the set of power transmission channels, P, for the safety and stability monitoring of the grid st.d Is (t) 0 + Δ t) time ST the reverse safety and stability quota, P, of the transmission channel ST st.0 Is t 0 Active power, s, of power transmission channel ST at time ST st.a Is t 0 The active sensitivity of the active power regulation measure a to the power transmission channel ST in the ST at the moment A; when t is 0 When the equipment on/off measure B is in the on state at the time B s st.b Is t 0 At the moment, the equipment switching/switching measure b switches off the active sensitivity to the power transmission channel ST in the ST, and when t is 0 When the device entering/exiting measure B is in the exiting state at the time B, s st.b Is t 0 The active sensitivity of the measure to a power transmission channel ST in the ST is put into use at the moment; s st.g Is t 0 The active power sensitivity, s, of the power plant G at time G to the active power of the transmission channel ST in ST st.l Is t 0 The active power sensitivity, s, of the load L at the time L to the active power of the transmission channel ST in ST st.gl Is t 0 Active sensitivity, s, of charging and discharging power of energy storage station GL in time GL to power transmission channel ST in ST st.d Is t 0 The active sensitivity, s, of the power of the direct current D at the time D to the transmission channel ST in ST st.tl Is t 0 The active power of the external link TL at the time TL is coupled to the active power sensitivity, P, of the transmission channel ST in the ST st.u Is (t) 0 + Δ t) the forward safety and stability quota of the transmission channel ST at time ST; all active power is positive when injected into the power grid, and negative when discharged from the power grid.
The invention achieves the following beneficial effects:
according to the overload tolerance time characteristic of the equipment at the current moment, equipment overload real-time control is carried out on the equipment with the safe operation tolerance time length being less than the equipment overload manual handling time limit, the short-time overload capacity of the equipment can be fully utilized, and the economical efficiency of power grid operation is correspondingly improved; the method has the advantages that the minimum control cost is taken as a target, the operation trend of the power grid is considered, the execution time of control measures, the safety operation time of all overload monitoring equipment at the time of completing the execution of the measures are not less than the manual handling time limit of equipment overload, and the safety and stability limit of all power transmission channels are not exceeded, so that the economic operation risk of 'over control' and the safety risk of 'under control' are effectively avoided; effective measures are screened according to the adjustable direction of the measures and the active sensitivity of the measures to the overload equipment, and the real-time performance of optimization decision is guaranteed. The invention effectively improves the coordination level of automatic control and manual handling of equipment overload, and fully utilizes the short-time overload capacity of the equipment on the premise of ensuring the safe operation of a power grid.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the real-time control method for equipment overload considering manual handling time limit and operation trend comprises the following steps:
step 1: according to the current time t 0 Overload endurance time characteristics of each device in overload monitoring device set E, and determining each device in E and the overload endurance time characteristics at t 0 The safe operation tolerance time corresponding to the current of each device in the moment E is shorter than the device overload manual handling time limit t cr The equipment in the method is used as an overload real-time control equipment set F, if the F is not empty, the step 2 is carried out, otherwise, the method is ended;
wherein, t 0 The overload tolerance time characteristic of the device at time t 0 The equipment operates at constant current from t under the condition that the meteorological condition of the equipment is unchanged at the moment 0 The corresponding relation between the current of the equipment and the corresponding safe operation endurance time obtained on the premise of continuous safe operation is started at any moment; the manual handling time limit of the equipment overload is combined with t according to the requirements of power grid dispatching operation management regulations 0 The number of measures of the manual treatment plan and the execution time of each measure are set as the shortest time length for overload of the manual treatment equipment.
Step 2: obtaining t 0 Active regulation measure for real-time control of equipment overload in time power gridSet A and equipment putting-in/putting-out measure set B according to t 0 Identifying invalid measures for the active sensitivity of each measure in the moment A and the adjustable direction of each measure in the moment B to each device in the moment F, and removing the invalid measures from the moment A and the moment B;
the active power regulation measures comprise power regulation of a power plant, load regulation of active power, energy storage charging and discharging power regulation and direct current power regulation, and the equipment switching/disconnecting measures comprise switching on and switching off of a line and switching on and switching off of a transformer;
the adjustable direction of the active adjustment measure is divided into 3 cases: 1) the adjustable direction of the measure that the active power can be increased and reduced is set to be an up direction and a down direction; 2) the adjustable direction of the active power only increasing measure is set to be up-regulated in 1 direction; 3) setting the adjustable direction of active power only reducing measures as down-regulation 1 direction; the equipment switching/quitting measures comprise switching measures and quitting measures, the adjustable direction of the switching measures is set to be up-regulated by 1 direction, and the adjustable direction of the quitting measures is set to be down-regulated by 1 direction;
the method for identifying the invalid measures comprises the following steps:
and determining measures with absolute values of active sensitivity of all the devices in the F smaller than the threshold value of the active sensitivity as invalid measures, and determining measures with absolute values of active sensitivity of all the devices in the F smaller than the threshold value of the active sensitivity as invalid measures.
And step 3: introducing a maximum value delta t of execution time length of each finally implemented measure as a variable, taking the minimum control cost as a target, considering the regulation speed and the adjustable space constraint of each active regulation measure regulating quantity in the step A to be finally implemented, taking the execution time length of the switching instruction of each equipment switching/switching measure in the step B to be finally implemented to be not more than the delta t constraint, and basing on (t) t 0 + delta t) time real-time planning and load ultra-short term prediction power grid active balance constraint, and (t) 0 + Δ t) time E the safe operation endurance time of each device is not less than t cr Constraint sum (t) 0 + delta t) time power transmission channel active power is not beyond safety and stability limit constraint, and an optimization model is constructed;
wherein, the optimization model is the following formula (1):
Figure BDA0002767796320000081
in the formula,. DELTA.P a The regulating variable, Δ P, for the active regulating measure a in A a Up-regulation to positive, Δ P a Down-regulation to negative, gamma a Is t 0 The cost of the unit adjustment quantity of the active adjustment measure a at the moment A;
Δk b the value of the throw/retreat instruction of the equipment throw/retreat measure B in the step B is 1, the throw/retreat instruction is input, the throw/retreat instruction is-1, the retreat is withdrawn, the throw/retreat instruction is 0, the t is kept 0 Constant on/off state at all times, gamma b Is at t 0 The cost of putting on/off the equipment in the step B;
P a.0 is at t 0 Active, P, of active regulating measure a at time A a.u Is (t) 0 + Δ t) moment A the upper active limit, P, of the active regulating measure a a.d Is (t) 0 + Δ t) the active lower limit of the active regulation measure a at time a;
v a.u is t 0 Unit active up-regulation degree, v, of active regulation measure a at time A a.d Is t 0 The unit active power down-regulation speed of the active power regulation measure a at the moment A;
k b.0 represents t 0 The on/off state of the equipment on/off measure B at the time B, when t 0 At the moment when the measure is in operation k b.0 Is set to 1 when t 0 At the moment when the measure is in the exit state k b.0 Set to 0;
f b (Δk b ) B, switching on/off the execution duration of the switching-on/off instruction of the measure B for the equipment in B;
P cr is t of set 0 The active power balance deviation threshold value of the power grid at the moment can be determined according to t 0 Setting the active frequency regulation characteristic and the hot reserve capacity of the power grid at any moment, wherein the smaller the active frequency regulation characteristic coefficient is, the smaller the hot reserve capacity is, and P cr The smaller the value of D is, the more 1 converter station is onD, DC sets in the power grid, DN is the DC sets of the converter stations in the power grid, and P is the active power regulation measure of the power plant when the active power regulation measure a in A is the active power regulation measure of the power plant a.t Is (t) 0 + Δ t) the real-time power generation plan value for the measure, P when active regulation measure a in a is the load active regulation measure a.t Is (t) 0 + delta t) active power regulation measure a, and when the control measure a in A is the energy storage station charge and discharge power regulation measure, P a.t Is (t) 0 + delta t) time control measure a, and when the control measure a in A is a direct current power regulation measure, P a.t Is (t) 0 + delta t) time control measure a, G being t 0 Time of day power grid power generation set, P g.0 Is t 0 Active power of the power plant G at time G, P g.t Is (t) 0 + Δ t) active real time projected value of the power plant G at time G, L being t 0 Time of day grid load set, P l.0 Is t 0 Active, P, of load L in time L l.t Is (t) 0 + Δ t) ultra-short term load prediction value of load L at time L, GL being t 0 Time of day power grid energy storage power station set, P gl.0 Is t 0 Charging and discharging power of energy storage power station GL in time GL, P gl.t Is (t) 0 + Δ t) time GL in which the charging and discharging real-time plan value of energy storage power station GL is defined, DW is D in which the DC collection except DN is P d.0 Is t 0 Power of DC D at time D, P d.t Is (t) 0 + Δ t) time D the real-time planned value of the power of the direct current D, TL being t 0 External AC interconnection line set P of time power grid tl.0 Is t 0 Active power of external AC link TL in time TL, P tl.t Is (t) 0 + Δ t) the active real-time planned value of the external ac link TL at the time TL;
P e.t is (t) 0 + Δ t) time
Figure BDA0002767796320000091
Active, P, of medium overload monitoring equipment e e.0 Is t 0 Time of day
Figure BDA0002767796320000092
Active, s, of medium overload monitoring devices e e.a Is t 0 Active regulation measure a pair in time A
Figure BDA0002767796320000093
Active sensitivity of medium overload monitoring device e; when t is 0 When the equipment on/off measure B is in the on state at the time B s e.b Is t 0 Time equipment on/off measure b off pair
Figure BDA0002767796320000094
Active sensitivity of medium overload monitoring device e, when t 0 When the device entering/exiting measure B is in the exiting state at time B s e.b Is t 0 Time equipment throwing/withdrawing measure b throwing pair
Figure BDA0002767796320000095
Active sensitivity of medium overload monitoring device e; s e.g Is t 0 Active pair of power plant G at time G
Figure BDA0002767796320000096
Active sensitivity, s, of medium overload monitoring devices e e.l Is t 0 Active pair of load L in time L
Figure BDA0002767796320000097
Active sensitivity, s, of medium overload monitoring devices e e.gl Is t 0 Charging and discharging power pair of energy storage power station GL in time GL
Figure BDA0002767796320000098
Active sensitivity, s, of medium overload monitoring devices e e.d Is t 0 Power pair of direct current D in time D
Figure BDA0002767796320000099
Active sensitivity, s, of medium overload monitoring devices e e.tl Is t 0 Active pair of external tie-line TL in time TL
Figure BDA00027677963200000910
Active sensitivity of medium overload monitoring device e;
g e (P e.t ) Is according to t 0 Time of day
Figure BDA0002767796320000101
Determination of overload withstand time characteristic of medium overload monitoring device e
Figure BDA0002767796320000102
Corresponding safe operation endurance time, wherein e.0 Is t 0 Time of day
Figure BDA0002767796320000103
Current of medium overload monitoring device e;
P f.t is (t) 0 Active power of the overload control device F at time F, + Δ t), P f.0 Is t 0 Active power s of overload control device F at time F f.a Is t 0 The active sensitivity of the active power regulation measure a to the overload control equipment F at the moment A; when t is 0 When the equipment on/off measure B is in the on state at the time B, s f.b Is t 0 At the moment, the measure is withdrawn from the active sensitivity to the overload control device F in F, and when t is 0 When the equipment throwing/withdrawing measure B is in the withdrawing state s in the moment B f.b Is t 0 The active sensitivity of the equipment switching/tripping measure b to the overload control equipment F in the F at the moment; s f.g Is t 0 Active power sensitivity of the power plant G at time G to the active power sensitivity of the overload control device F at F, s f.l Is t 0 Active power of load L at time L to active power sensitivity, s, of overload control device F at time F f.gl Is t 0 Active sensitivity, s, of charging and discharging power of energy storage power station GL in time GL to overload control device F in F f.d Is t 0 Active sensitivity, s, of the power of the direct current D at the moment D to the overload control device F at F f.tl Is t 0 The active power of the external connecting line TL at the moment TL has active sensitivity to the F overload control device F;
g f (P f.t ) Is according to t 0 Determination of the overload withstand time characteristic of the overload control device F at the time F
Figure BDA0002767796320000104
Corresponding safe operation endurance time, wherein f.0 Is t 0 The current, beta, of the overload control device F at the time F f Is according to t 0 The higher the non-linear degree is, the larger the value is;
ST is the set of power transmission channels, P, for the safety and stability monitoring of the grid st.d Is (t) 0 + Δ t) time ST the reverse safety and stability quota, P, of the transmission channel ST st.0 Is t 0 Active power, s, of a transmission channel ST at a time ST st.a Is t 0 The active sensitivity of the active power regulation measure a to the power transmission channel ST in the ST at the moment A; when t is 0 When the equipment on/off measure B is in the on state at the time B s st.b Is t 0 At the moment, the equipment switching/switching measure b switches off the active sensitivity to the power transmission channel ST in the ST, and when t is 0 When the device entering/exiting measure B is in the exiting state at the time B, s st.b Is t 0 The active sensitivity of the measure to a power transmission channel ST in the ST is put into use at the moment; s st.g Is t 0 The active power sensitivity, s, of the power plant G at time G to the active power of the transmission channel ST in ST st.l Is t 0 The active power sensitivity, s, of the load L at the time L to the active power of the transmission channel ST in ST st.gl Is t 0 Active sensitivity, s, of charging and discharging power of energy storage station GL in time GL to power transmission channel ST in ST st.d Is t 0 The active sensitivity, s, of the power of the direct current D at the time D to the transmission channel ST in ST st.tl Is t 0 The active power of the external tie-line TL at the moment TL has an active sensitivity, P, to the power transmission channel ST in the ST st.u Is (t) 0 + Δ t) the forward safety and stability quota of the transmission channel ST at time ST;
all active power is positive when injected into the power grid, and negative when discharged from the power grid.
And 4, step 4: and (3) by solving an optimization model, taking the obtained regulating quantity of each active regulating measure in the step A and the switching instruction of each equipment switching/switching measure in the step B as finally implemented equipment overload real-time control measures, and carrying out real-time control on the power grid.
In order to improve the solving speed of the optimization model, the optimization model can be solved under the condition of setting delta t by sampling delta t in the value range, and then the adjustment quantity of each active adjusting measure in A and the switching instruction of each equipment switching/switching measure in B corresponding to the minimum objective function value are used as the finally implemented equipment overload real-time control measure by comparing the sizes of the optimized objective function values corresponding to different delta t.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The real-time control method for equipment overload considering manual handling time limit and operation trend is characterized by comprising the following steps of:
step 1: according to the current time t 0 Overload endurance time characteristics of each device in overload monitoring device set E, and determining each device in E and the overload endurance time characteristics at t 0 The safe operation tolerance time corresponding to the current of each device in the moment E is shorter than the device overload manual handling time limit t cr The equipment in the method is used as an overload real-time control equipment set F, if the F is not empty, the step 2 is carried out, otherwise, the method is ended;
step 2: obtaining t 0 An active power regulation measure set A and a device switching/quitting measure set B for real-time control of device overload in a power grid at any moment according to t 0 Identifying invalid measures for the active sensitivity of each measure in the moment A and the adjustable direction of each measure in the moment B to each device in the moment F, and removing the invalid measures from the moment A and the moment B;
and step 3: introducing a maximum value delta t of execution time length of each finally implemented measure as a variable, taking the minimum control cost as a target, considering the regulation speed and the adjustable space constraint of each active regulation measure regulating quantity in the step A to be finally implemented, taking the execution time length of the switching instruction of each equipment switching/switching measure in the step B to be finally implemented to be not more than the delta t constraint, and basing on (t) t 0 + delta t) time real-time planning and load ultra-short term prediction power grid active balance constraint, and (t) 0 + Δ t) time E the safe operation endurance time of each device is not less than t cr Constraint sum (t) 0 + delta t) time power transmission channel active power is not beyond safety and stability limit constraint, and an optimization model is constructed;
and 4, step 4: by solving an optimization model, the obtained regulating quantity of each active regulating measure in the step A and the switching instruction of each equipment switching/switching measure in the step B are used as finally implemented equipment overload real-time control measures to control the power grid in real time;
in step 3, the optimization model is the following formula (1):
Figure FDA0003692685480000021
in the formula,. DELTA.P a The regulating variable, Δ P, for the active regulating measure a in A a Up-regulation to positive, Δ P a Down-regulation to negative, gamma a Is t 0 The cost of the unit adjustment quantity of the active adjustment measure a at the moment A;
Δk b the value of the throw/retreat instruction of the equipment throw/retreat measure B in the step B is 1, the throw/retreat instruction is input, the throw/retreat instruction is-1, the retreat is withdrawn, the throw/retreat instruction is 0, the t is kept 0 Constant on/off state at all times, gamma b Is at t 0 The cost of putting on/off the equipment in the step B;
P a.0 is at t 0 Active, P, of active regulating measure a at time A a.u Is (t) 0 + Δ t) moment A the upper active limit, P, of the active regulating measure a a.d Is (t) 0 + Δ t) the active lower limit of the active regulation measure a at time a;
v a.u is t 0 Unit active up-regulation degree, v, of active regulation measure a at time A a.d Is t 0 The unit active power down-regulation speed of the active power regulation measure a at the moment A;
k b.0 represents t 0 The on/off state of the equipment on/off measure B at the time B, when t 0 At the moment when the measure is in operation k b.0 Is set to 1 when t 0 At the moment when the measure is in the exit state k b.0 Set to 0;
f b (Δk b ) B, switching on/off the execution duration of the switching-on/off instruction of the measure B for the equipment in B;
P cr is t of set 0 The active power balance deviation threshold value of the power grid at any moment, D is a direct current set with at least 1 converter station in the power grid, and DN is that the converter stations are all in the power gridDC set, P when active regulation measure a in A is active regulation measure of power plant a.t Is (t) 0 + Δ t) the real-time power generation plan value for the measure, P when active regulation measure a in a is the load active regulation measure a.t Is (t) 0 + delta t) active power regulation measure a, and when the control measure a in A is the energy storage station charge and discharge power regulation measure, P a.t Is (t) 0 + delta t) time control measure a, and when the control measure a in A is a direct current power regulation measure, P a.t Is (t) 0 + delta t) time control measure a, G being t 0 Time of day power grid power generation set, P g.0 Is t 0 Active power of the power plant G at time G, P g.t Is (t) 0 + Δ t) active real time projected value of the power plant G at time G, L being t 0 Time of day grid load set, P l.0 Is t 0 Active, P, of load L in time L l.t Is (t) 0 + Δ t) ultra-short term load prediction value of load L at time L, GL being t 0 Time of day power grid energy storage power station set, P gl.0 Is t 0 Charging and discharging power of energy storage power station GL in time GL, P gl.t Is (t) 0 + Δ t) time GL in which the charging and discharging real-time plan value of energy storage power station GL is defined, DW is D in which the DC collection except DN is P d.0 Is t 0 Power of DC D at time D, P d.t Is (t) 0 + Δ t) time D the real-time planned value of the power of the direct current D, TL being t 0 External AC interconnection line set P of time power grid tl.0 Is t 0 Active power of external AC link TL in time TL, P tl.t Is (t) 0 + Δ t) the active real-time planned value of the external ac link TL at the time TL;
P e.t is (t) 0 + Δ t) time
Figure FDA0003692685480000031
Active, P, of medium overload monitoring equipment e e.0 Is t 0 Time of day
Figure FDA0003692685480000032
Active, s, of medium overload monitoring devices e e.a Is t 0 Active regulation measure a pair in time A
Figure FDA0003692685480000033
Active sensitivity of medium overload monitoring device e; when t is 0 When the equipment on/off measure B is in the on state at the time B s e.b Is t 0 Time equipment on/off measure b off pair
Figure FDA0003692685480000034
Active sensitivity of medium overload monitoring device e, when t 0 When the device entering/exiting measure B is in the exiting state at time B s e.b Is t 0 Time equipment throwing/withdrawing measure b throwing pair
Figure FDA0003692685480000036
Active sensitivity of medium overload monitoring device e; s e.g Is t 0 Active pair of power plant G at time G
Figure FDA0003692685480000035
Active sensitivity, s, of medium overload monitoring devices e e.l Is t 0 Active pair of load L in time L
Figure FDA0003692685480000037
Active sensitivity, s, of medium overload monitoring devices e e.gl Is t 0 Charging and discharging power pair of energy storage power station GL in time GL
Figure FDA0003692685480000038
Active sensitivity, s, of medium overload monitoring devices e e.d Is t 0 Power pair of direct current D in time D
Figure FDA0003692685480000039
Active sensitivity, s, of medium overload monitoring devices e e.tl Is t 0 Active pair of external tie-line TL in time TL
Figure FDA00036926854800000310
Active sensitivity of medium overload monitoring device e;
g e (P e.t ) Is according to t 0 Time of day
Figure FDA00036926854800000311
Determination of overload withstand time characteristic of medium overload monitoring device e
Figure FDA00036926854800000312
Corresponding safe operation endurance time, wherein e.0 Is t 0 Time of day
Figure FDA0003692685480000041
Current of medium overload monitoring device e;
P f.t is (t) 0 Active power of the overload control device F at time F, + Δ t), P f.0 Is t 0 Active power s of overload control device F at time F f.a Is t 0 The active sensitivity of the active power regulation measure a to the overload control equipment F at the moment A; when t is 0 When the equipment on/off measure B is in the on state at the time B, s f.b Is t 0 At the moment, the measure is withdrawn from the active sensitivity to the overload control device F in F, and when t is 0 When the device entering/exiting measure B is in the exiting state at time B s f.b Is t 0 The active sensitivity of the equipment switching/tripping measure b to the overload control equipment F in the F at the moment; s f.g Is t 0 Active power of the power plant G at time G to active power sensitivity of the overload control device F at F, s f.l Is t 0 Active power of load L at time L to active power sensitivity, s, of overload control device F at time F f.gl Is t 0 Active sensitivity, s of charging and discharging power of energy storage power station GL in time GL to overload control equipment F in F f.d Is t 0 Active sensitivity, s, of the power of the direct current D at the moment D to the overload control device F at F f.tl Is t 0 Active pair F overload control of external tie-line TL in time TLThe active sensitivity of device f;
g f (P f.t ) Is according to t 0 Determination of the overload withstand time characteristic of the overload control device F at the time F
Figure FDA0003692685480000042
Corresponding safe operation endurance time, wherein f.0 Is t 0 The current, beta, of the overload control device F at the time F f Is according to t 0 The higher the non-linear degree is, the larger the value is;
ST is the set of power transmission channels, P, for the safety and stability monitoring of the grid st.d Is (t) 0 + Δ t) time ST the reverse safety and stability quota, P, of the transmission channel ST st.0 Is t 0 Active power, s, of power transmission channel ST at time ST st.a Is t 0 The active sensitivity of the active power regulation measure a to the power transmission channel ST in the ST at the moment A; when t is 0 When the equipment on/off measure B is in the on state at the time B s st.b Is t 0 At the moment, the equipment switching/switching measure b switches off the active sensitivity to the power transmission channel ST in the ST, and when t is 0 When the device entering/exiting measure B is in the exiting state at the time B, s st.b Is t 0 The active sensitivity of the measure to a power transmission channel ST in the ST is put into use at the moment; s st.g Is t 0 The active power sensitivity, s, of the power plant G at time G to the active power of the transmission channel ST in ST st.l Is t 0 The active power sensitivity, s, of the load L at the time L to the active power of the transmission channel ST in ST st.gl Is t 0 Active sensitivity, s, of charging and discharging power of energy storage station GL in time GL to power transmission channel ST in ST st.d Is t 0 The active sensitivity, s, of the power of the direct current D at the time D to the transmission channel ST in ST st.tl Is t 0 The active power of the external tie-line TL at the moment TL has an active sensitivity, P, to the power transmission channel ST in the ST st.u Is (t) 0 + Δ t) the forward safety and stability quota of the transmission channel ST at time ST; all active power is positive when injected into the power grid, and negative when discharged from the power grid.
2. The method for real-time control of equipment overload taking account of manual handling time limit and running trend according to claim 1, wherein in step 1, t 0 The overload endurance time characteristic of the device at time t is referred to 0 The equipment operates at constant current from t under the condition that the meteorological condition of the equipment is unchanged at the moment 0 And the corresponding relation between the current of the equipment and the corresponding safe operation endurance time obtained on the premise of continuous safe operation is started at the moment.
3. The real-time control method for equipment overload according to claim 1, wherein the time limit for equipment overload handling in step 1 is determined according to the requirement of "power grid dispatching operation management regulation", in combination with t 0 The number of measures of the manual treatment plan and the execution time of each measure are set as the shortest time length for overload of the manual treatment equipment.
4. The method for real-time control of equipment overload according to claim 1, wherein in step 2, the active power regulation measures include power plant active power regulation, load active power regulation, energy storage charging and discharging power regulation and direct current power regulation, and the equipment switching/disconnecting measures include circuit switching and transformer switching.
5. The method for real-time control of equipment overload considering manual handling time limit and operation trend as claimed in claim 1, wherein in step 2, the adjustable direction of active adjustment measure is divided into 3 cases: 1) the adjustable direction of the measure that the active power can be increased and reduced is set to be an up direction and a down direction; 2) setting the adjustable direction of the active power only increasing measure as 1 direction; 3) setting the adjustable direction of active power only reducing measures as down-regulation 1 direction;
the equipment throwing/withdrawing measures comprise throwing measures and withdrawing measures, the adjustable direction of the throwing measures is set to be adjusted upwards in 1 direction, and the adjustable direction of the withdrawing measures is set to be adjusted downwards in 1 direction.
6. The method for real-time control of equipment overload considering manual handling time limit and operation trend as claimed in claim 1, wherein in step 2, the method for identifying invalid measures is as follows:
and determining measures with absolute values of active sensitivity of all the devices in the F smaller than the threshold value of the active sensitivity as invalid measures, and determining measures with absolute values of active sensitivity of all the devices in the F smaller than the threshold value of the active sensitivity as invalid measures.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106655154A (en) * 2016-10-12 2017-05-10 云南电力调度控制中心 Self-adaptive emergency control system and method for the overload of power system device
CN107124006A (en) * 2017-05-05 2017-09-01 国电南瑞科技股份有限公司 The adaptive emergency control method of apparatus overload recognized automatically based on measure sensitivity

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106655154A (en) * 2016-10-12 2017-05-10 云南电力调度控制中心 Self-adaptive emergency control system and method for the overload of power system device
CN107124006A (en) * 2017-05-05 2017-09-01 国电南瑞科技股份有限公司 The adaptive emergency control method of apparatus overload recognized automatically based on measure sensitivity

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