CN104979823A - Safety and stability online prevention and control optimization decision method for multi-stage scheduling collaboration of power grid - Google Patents

Abstract

The invention discloses a safety and stability online prevention and control optimization decision method for multi-stage scheduling collaboration of a power grid, and belongs to the technical field of power system scheduling operation control. Due to the fact that safety and stability problems in a large power grid are interwoven with each other, an operation control mode of a multi-stage regulation and control method is combined so as to disclose an online operation mode and prevention and control candidate measures for a power grid, which comprises the regulation and control center and a direct subordinate regulation and control center thereof, a direct superior regulation and control center and a direct subordinate regulation and control center thereof, at each regulation and control center at each stage, so that safety and stability online estimation on a fault set which directly defenses the large power grid is carried out; influencing factors of cooperative defense of the regulation and control center at each stage are introduced to compute control performance comprehensive indexes of prevention and control candidate measures, so that prevention and control measure calculation for the fault set which directly defenses the large power grid is carried out; and safety and stability verification is carried out on the combined prevention and control measures, so that the safety and stability online prevention and control optimization decision method for multi-stage scheduling collaboration can be realized.

Description

The safety and stability online preventive control Study on Decision-making Method for Optimization that electrical network multi-stage scheduling is collaborative

Technical field

The invention belongs to power system dispatching and run control technology field, more precisely, the present invention relates to a kind of method being applicable to the online preventive control Optimal Decision-making of multi-stage scheduling composite defense safety and stability in bulk power grid.

Background technology

Because in bulk power grid, element is numerous, geographic range is wide, usually arranges Multi-regulation center and carries out management and running control and management to bulk power grid.Bulk power grid has the advantage of transmitting electricity on a large scale, but safety and stability Property comparison is complicated, exist safety and stability problem on a large scale, the phenomenon that is interweaved of many regulation and control levels, the safety and stability problem under the forecast failure defendd is responsible at single regulation and control center, on the one hand, possibly cannot be solved by the measure of the direct modification scope in these regulation and control center, or can safety and stability be ensured by the measure of the direct modification scope in these regulation and control center completely, but control cost be far longer than by with bulk power grid in other regulates and controls the cost of center composite defense; On the other hand, can ensure that the safety and stability under the forecast failure defendd is responsible at these regulation and control center by the measure of the direct modification scope in these regulation and control center, but more serious adverse effect may be caused to the safety and stability that other regulation and control center in bulk power grid is responsible under the forecast failure defendd.

Existing safety and stability online preventive control Study on Decision-making Method for Optimization, for being only have a regulation and control center in electrical network, does not consider the management and running control and management pattern of actual bulk power grid.Suppose the regulation and control center only having a responsible safety and stability in bulk power grid, the method is directly applied to bulk power grid, then can only based on the on-line operation mode of electrical network covering all each regulation and control central regulator at different levels of bulk power grid, for the forecast failure collection that each regulation and control centers at different levels that bulk power grid is all are defendd, carry out safety and stability online preventive control Optimal Decision-making to calculate, amount of calculation is huge, even if by the whole efficiency utilization of each regulation and control center existing on-line security and stability analysis computational resource at different levels all for bulk power grid, also the requirement of online preventive control real-time cannot be met.

Therefore, in order to significantly reduce safety and stability hidden danger, giving full play to the advantage that bulk power grid is transmitted electricity on a large scale, needing the safety and stability online preventive control decision-making technique of research bulk power grid multi-stage scheduling composite defense badly.

Summary of the invention

The present invention seeks to: for deficiency of the prior art, in conjunction with the operation control model at Multi-regulation center, a kind of method being applicable to the online preventive control Optimal Decision-making of multi-stage scheduling composite defense safety and stability in bulk power grid is provided, solve the problem of reciprocal effect between safety and stability online preventive control Optimal Decision-making that existing electricity net safety stable online preventive control Study on Decision-making Method for Optimization do not consider each regulation and control center at different levels, to meet in bulk power grid on a large scale, the safety and stability problem that many regulation and control level is interweaved is to the actual demand of multistage multiple regulation and control center composite defense technology.

General principle of the present invention is: the characteristic that bulk power grid safety and stability problem has on a large scale, many regulation and control levels are interweaved, need on a large scale, regulate and control in level electrical network to search for Control Measure more, just can find the Control Measure solving safety and stability problem, really could realize the optimization of safety and stability Control Measure.Regulate and control center and the power system operating mode data directly between subordinate's regulation and control center and the mutual of prevention and control candidate measure by these regulation and control center and its immediate superior to share, the parallel processing of safety and stability online evaluation is only carried out at each regulation and control center at different levels respectively to the forecast failure collection of its direct defenses, again the Control performance standard of prevention and control candidate measure is shared alternately between the regulation and control center of tight association, obtain the control performance overall target of prevention and control candidate measure, then, only the forecast failure collection of its direct defenses is carried out to the parallel processing of safety and stability online preventive control Optimal Decision-making respectively at each regulation and control center at different levels based on the control performance overall target of prevention and control candidate measure, both achieved on a large scale, Control Measure is searched in many regulation and control level electrical network, take full advantage of again the computational resource at each regulation and control center at different levels, adapt to bulk power grid multi-stage scheduling and run control and management pattern, meet the decision-making of bulk power grid safety and stability online preventive control to reliability, the requirement of precision and real-time.

Specifically, the present invention realizes by the following technical solutions, comprises the steps:

1) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

According to its Real-time Collection or the operation of power networks state information collected, bonding apparatus model and parameter, generates the on-line operation mode data S of the electrical network of these regulation and control center direct regulation and control _i.j, and generate the forecast failure collection F of these regulation and control center direct defenses _i.jwith the online preventive control candidate measure collection M of direct regulation and control _i.j, by the online preventive control Optimized Measures collection CM of these regulation and control center direct regulation and control _i.jbe set to empty set;

Wherein, i=1,2,, I, I represent in electrical network the sum of the level regulating and controlling layer, i represents the level sequence number of the regulation and control layer in electrical network residing for each regulation and control center, and the 1st grade is highest, and the 2nd grade is the direct subordinate of the 1st grade, 1st grade is the immediate superior of the 2nd grade, and by that analogy, I level is lowermost level, j=1,2 ..., J _i, J _irepresent the sum at the regulation and control center being in i-th grade of regulation and control layer;

After all regulation and control centers complete above-mentioned process, enter step 2);

The regulation and control center being in the 1st grade of regulation and control layer only has 1, the regulation and control center being in other regulation and control layer at different levels has 1 at least, except being in the regulation and control center of the 1st grade of regulation and control layer, the immediate superior regulation and control center at other regulation and control center has and only has 1, and the number at direct subordinate's regulation and control center at each regulation and control center does not limit;

The online preventive control candidate measure collection of each regulation and control center direct regulations and controls at different levels of electrical network to refer under current operational mode that optional prevention and control equipment and control variables thereof, controlling party are to the set with controlled amounts maximum, and the common factors of the forecast failure collection of each regulation and control center direct defenses at different levels of electrical network are empty set;

The online preventive control Optimized Measures collection of each regulation and control center direct regulations and controls at different levels of electrical network refer to that prevention and control equipment selected under current operational mode and control variables thereof, controlling party are to the set of the increment of, final controlled quentity controlled variable and controlled quentity controlled variable, and the common factor that the online preventive control candidate measures of each regulation and control center direct regulations and controls at different levels of electrical network integrate is as empty set;

The increment of controlled quentity controlled variable refers in iterative process the controlled quentity controlled variable of often taking turns prevention and control equipment and the control variables thereof calculated;

2) at the regulation and control center being in the 1st grade of regulation and control layer, the current time of operation of power networks is designated as t ₀, enter step 3);

3) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the powernet running mode data of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, based on the S at these regulation and control center _i.jin conjunction with the powernet running mode data of the regulation and control center direct regulation and control relevant to these regulation and control close centre, the running mode data of carrying out towards electricity net safety stable online evaluation integrates process, generates the powernet running mode data S ' carrying out safety and stability online evaluation for these regulation and control center comprising the electrical network of these regulation and control center direct regulation and control and the electrical network of the regulation and control center direct regulation and control relevant to these regulation and control close centre _i.j;

Finally, according to the S ' at these regulation and control center _i.j, for the F at these regulation and control center _i.jcarry out safety and stability online evaluation;

After all regulation and control centers complete above-mentioned process, enter step 4);

When these regulation and control center is the regulation and control center being in the 1st grade of regulation and control layer, the described regulation and control center relevant to these regulation and control close centre is that all direct subordinates at these regulation and control center regulate and control center; When these regulation and control center is the regulation and control center being in other regulation and control layers, all direct subordinates that all direct subordinates except these regulation and control center that the immediate superior that the described regulation and control center relevant to these regulation and control close centre comprises these regulation and control center regulates and controls center, the immediate superior at these regulation and control center regulates and controls center regulate and control center and these regulation and control center regulate and control center;

4) at the regulation and control center being in the 1st grade of regulation and control layer, collect the safety and stability online evaluation result at other each regulation and control center at different levels, if each regulation and control centers at different levels of electrical network all meet safe and stable operation requirement for the safety and stability online evaluation result of the forecast failure collection of its direct defenses, then think that the current operating conditions of electrical network is safety and stability, each regulation and control center at different levels does not need to take Control Measure to the electrical network of its direct regulation and control, method ends, otherwise, enter step 5);

5) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the online preventive control candidate measure collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, by the M at these regulation and control center _i.jand the union of the online preventive control candidate measure collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre, as these regulation and control center calculation for F _i.jcandidate's measure collection M ' of electricity net safety stable online preventive control Optimized Measures _i.j;

Finally, based on the safety and stability online evaluation result that these regulation and control center is up-to-date, the M ' at these regulation and control center is calculated _i.jin each prevention and control candidate measure at S ' _i.junder for F _i.jthe Control performance standard of power grid security and stability;

After all regulation and control centers complete above-mentioned process, enter step 6);

The Control performance standard of prevention and control candidate measure refers to that the ratio of the rear recruitment of electricity net safety stable nargin and the control cost of these prevention and control candidate measure is implemented in these prevention and control candidate measure;

6) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the Control performance standard of each candidate's measure is concentrated in candidate's measure that the safety and stability online preventive control Optimized Measures collecting the regulation and control center relevant to these regulation and control close centre calculates;

Then, when these regulation and control center is the regulation and control center being in the 1st grade of regulation and control layer, the M at these regulation and control center is calculated by formula (1) _i.jin the control performance overall target of each prevention and control candidate measure when multi-stage scheduling composite defense power grid security and stability; When these regulation and control center is the regulation and control center being in other regulation and control layers, calculated the M at these regulation and control center by formula (2) _i.jin the control performance overall target of each prevention and control candidate measure when multi-stage scheduling composite defense power grid security and stability;

${\mathrm{PI}}_{i.j.k}^{\′}={\mathrm{PI}}_{i.j.k}+\frac{1}{{\mathrm{\λ}}_u}\underset{l=1}{\overset{D_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{{i+1.d}_{i.j.l}.k},k=\mathrm{1,2},\·\·\·,K_{i.j}---\left(1\right)$

$\begin{array}{cc}{\mathrm{PI}}_{i.j.k}^{\′}={\mathrm{PI}}_{i.j.k}+{\mathrm{\λ}}_u{\mathrm{PI}}_{{i-1.u}_{i.j}.k}+\frac{1}{{\mathrm{\λ}}_u}\underset{l=1}{\overset{D_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{i+1.d_{i.j.l}.k}+{\mathrm{\λ}}_n\underset{l=1;l\≠j}{\overset{N_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{{i.n}_{i.j.l}.k}& k=\mathrm{1,2},\·\·\·,K_{i.j}---\left(2\right)\end{array}$

In formula, K _i.jfor M _i.jthe sum of middle prevention and control candidate measure, PI _i.j.kfor M _i.jthe prevention and control candidate measure of middle kth is used for for F _i.jthe Control performance standard of power grid security and stability, u _i.jfor sequence number in the heart in each regulation and control in the regulation and control floor of immediate superior regulation and control center residing for it at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at the immediate superior regulation and control center for these regulation and control center, D _i.jfor the sum at direct subordinate's regulation and control center at these regulation and control center, d _i.j.lfor sequence number in the heart in each regulation and control directly in the regulation and control floor of subordinate's regulation and control center residing for it of the l at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at l direct subordinate's regulation and control center for these regulation and control center, N _i.jfor the sum at direct subordinate's regulation and control center at the immediate superior regulation and control center at these regulation and control center, n _i.j.lfor sequence number in the heart in each regulation and control directly in the regulation and control floor of subordinate's regulation and control center residing for it of the l at the immediate superior regulation and control center at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at l direct subordinate's regulation and control center at the immediate superior regulation and control center for these regulation and control center, λ _ufor the coordinating factor between the superior and the subordinate's regulation and control center direct when multi-stage scheduling composite defense power grid security and stability, get the set point being more than or equal to 1, λ _nfor belong to same immediate superior regulation and control center when multi-stage scheduling composite defense power grid security and stability difference regulation and control center between coordinating factor, get and be more than or equal to 1, be less than or equal to λ _uset point, PI ' _i.j.kfor M _i.jthe prevention and control candidate measure of middle kth is used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable;

After all regulation and control centers complete above-mentioned process, enter step 7);

7) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the online preventive control candidate measure collecting the regulation and control center direct regulation and control relevant to these regulation and control close centre concentrates each prevention and control candidate measure for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable, obtains the M ' at these regulation and control center _i.jin each prevention and control candidate measure be used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable;

Then, if the up-to-date safety and stability online evaluation result in these regulation and control center does not meet safe and stable operation requirement, then based on the M ' at these regulation and control center _i.jin each prevention and control candidate measure be used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable, for the S ' at these regulation and control center _i.j, calculate and meet F _i.jthe online preventive control Optimized Measures collection that lower safe and stable operation requires, as the online preventive control Optimized Measures collection DM of these regulation and control center process to be combined _i.j, otherwise, by the online preventive control Optimized Measures collection DM of process to be combined for these regulation and control center _i.jbe set to empty set;

After all regulation and control centers complete above-mentioned process, enter step 8);

The online preventive control Optimized Measures collection of described process to be combined comprise prevention and control equipment and control variables thereof, controlling party to and controlled quentity controlled variable;

8) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the online preventive control Optimized Measures collection of the regulation and control center to be combined process relevant to these regulation and control close centre is collected;

Then, for the M at these regulation and control center _i.jin each prevention and control equipment and control variables thereof, if it is at the DM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center to be combined process relevant to these regulation and control close centre 1 of concentrating gathers, then first by this prevention and control equipment and control variables thereof the controlling party in this set to and controlled quentity controlled variable, join the CM at these regulation and control center _i.jin, as the controlling party of this prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, then by CM _i.jin this prevention and control equipment and the final controlled quentity controlled variable of control variables thereof and the increment sum of controlled quentity controlled variable as new final controlled quentity controlled variable; If it is at the DM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center to be combined process relevant to these regulation and control close centre concentrate 2 and with in upper set, and its controlling party is to all identical in these set, then first by controlling party in these set of this prevention and control equipment and control variables thereof to the maximum in controlled quentity controlled variable, join the CM at these regulation and control center _i.jin, as the controlling party of this prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, then by CM _i.jin this prevention and control equipment and the final controlled quentity controlled variable of control variables thereof and the increment sum of controlled quentity controlled variable as new final controlled quentity controlled variable;

After all regulation and control centers complete above-mentioned process, enter step 9);

9) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the online preventive control Optimized Measures collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, according to the CM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center direct regulation and control relevant to these regulation and control close centre concentrates the controlling party of all prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, to the S ' at these regulation and control center _i.jcarry out adjusting and upgrading,

Finally, the S ' after upgrading for adjustment _i.j, carry out for F _i.jsafety and stability online evaluation;

After all regulation and control centers complete above-mentioned process, enter step 10);

10) at the regulation and control center being in the 1st grade of regulation and control layer, collect the safety and stability online evaluation result at other each regulation and control center at different levels, if the up-to-date safety and stability online evaluation result in each regulation and control centers at different levels of electrical network all meets power network safety operation requirement, then by the CM at each regulation and control center at different levels _i.jas the safety and stability online preventive control Optimized Measures that multi-stage scheduling is collaborative, method ends; Otherwise, enter step 11);

11) at the regulation and control center being in the 1st grade of regulation and control layer, if the current time of operation of power networks and t ₀difference be less than setting duration, enter step 12), otherwise, think that search is less than the collaborative safety and stability online preventive control Optimized Measures of multi-stage scheduling, method ends.

12) at each regulation and control centers at different levels of electrical network, first, from M _i.jmiddle rejecting and CM _i.jmiddle prevention and control equipment and the identical but controlling party of control variables thereof to contrary candidate's measure, and from M _i.jmiddle rejecting and CM _i.jmiddle prevention and control equipment and the identical and controlling party of control variables thereof to identical but candidate's measure that controlled amounts maximum is equal with the increment of controlled quentity controlled variable, then by M _i.jin with CM _i.jmiddle prevention and control equipment and the identical and controlling party of control variables thereof are set to the difference of this controlled amounts maximum and controlled quentity controlled variable increment to the controlled amounts maximum of identical candidate's measure, return step 5), carry out next round calculating.

Beneficial effect of the present invention is as follows: the present invention is based on that these regulation and control center and its immediate superior regulate and control center and the power system operating mode data directly between subordinate's regulation and control center, the mutual of Control performance standard of prevention and control candidate measure and prevention and control candidate measure is shared, meet the requirement that bulk power grid safety and stability characteristic calculates safety and stability, ensure that reliability and the precision of bulk power grid safety and stability online evaluation and Control Measure optimum results; Each regulation and control center at different levels is adopted only the forecast failure collection of its direct defenses to be carried out to the parallel processing strategy of safety and stability online evaluation and Control Measure optimization respectively, take full advantage of the computational resource at each regulation and control center at different levels, adapt to bulk power grid multi-stage scheduling and run control and management pattern, meet the decision-making of bulk power grid safety and stability online preventive control to the requirement of real-time.

Accompanying drawing explanation

Fig. 1 is the flow chart of the step 1-7 of the inventive method.

Fig. 2 is the flow chart of the step 8-12 of the inventive method.

Embodiment

With reference to the accompanying drawings the present invention is described in further detail.

In Fig. 1, step 1 describes, and 1) at each regulation and control centers at different levels of electrical network, carry out following process respectively:

According to its Real-time Collection or the operation of power networks state information collected, bonding apparatus model and parameter, generates the on-line operation mode data S of the electrical network of these regulation and control center direct regulation and control _i.j, and generate the forecast failure collection F of these regulation and control center direct defenses _i.jwith the online preventive control candidate measure collection M of direct regulation and control _i.j, by the online preventive control Optimized Measures collection CM of these regulation and control center direct regulation and control _i.jbe set to empty set;

Wherein, i=1,2,, I, I represent in electrical network the sum of the level regulating and controlling layer, i represents the level sequence number of the regulation and control layer in electrical network residing for each regulation and control center, and the 1st grade is highest, and the 2nd grade is the direct subordinate of the 1st grade, 1st grade is the immediate superior of the 2nd grade, and by that analogy, I level is lowermost level, j=1,2 ..., J _i, J _irepresent the sum at the regulation and control center being in i-th grade of regulation and control layer;

After all regulation and control centers complete above-mentioned process, enter step 2).

The regulation and control center being in the 1st grade of regulation and control layer only has 1, the regulation and control center being in other regulation and control layer at different levels has 1 at least, except being in the regulation and control center of the 1st grade of regulation and control layer, the immediate superior regulation and control center at other regulation and control center has and only has 1, and the number at direct subordinate's regulation and control center at each regulation and control center does not limit;

The online preventive control candidate measure collection of each regulation and control center direct regulations and controls at different levels of electrical network to refer under current operational mode that optional prevention and control equipment and control variables thereof, controlling party are to the set with controlled amounts maximum, and the common factors of the forecast failure collection of each regulation and control center direct defenses at different levels of electrical network are empty set;

The online preventive control Optimized Measures collection of each regulation and control center direct regulations and controls at different levels of electrical network refer to that prevention and control equipment selected under current operational mode and control variables thereof, controlling party are to the set of the increment of, final controlled quentity controlled variable and controlled quentity controlled variable.For continuously adjustable prevention and control candidate measure, such as increase certain generated power to exert oneself, then prevention and control equipment be generator name, generated power, controlling party to for increasing, controlled amounts maximum be this generator within prevention and control effective time (being usually set to 10 minutes) is adjustable to the difference of maximum and its currency of exerting oneself of gaining merit; For the prevention and control candidate measure of discrete adjustment, such as operation is thrown/moved back to equipment, then prevention and control equipment be equipment (comprising multiple equipment) name, switch, controlling party to for throwing/moving back, controlled amounts maximum can be set to 1.The common factor that integrates of online preventive control candidate measures of each regulation and control center direct regulations and controls at different levels of electrical network is as empty set;

The increment of controlled quentity controlled variable refers in iterative process the controlled quentity controlled variable of often taking turns prevention and control equipment and the control variables thereof calculated.

In Fig. 1, step 2 describes, and being in the regulation and control center of the 1st grade of regulation and control layer, the current time of operation of power networks is designated as t ₀, enter step 3).

In Fig. 1, step 3 describes, and at each regulation and control centers at different levels of electrical network, carries out following process respectively:

First, the powernet running mode data of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, based on the S at these regulation and control center _i.jin conjunction with the powernet running mode data of the regulation and control center direct regulation and control relevant to these regulation and control close centre, the running mode data of carrying out towards electricity net safety stable online evaluation integrates process, generates the powernet running mode data S ' carrying out safety and stability online evaluation for these regulation and control center comprising the electrical network of these regulation and control center direct regulation and control and the electrical network of the regulation and control center direct regulation and control relevant to these regulation and control close centre _i.j;

Finally, according to the S ' at these regulation and control center _i.j, for the F at these regulation and control center _i.jcarry out safety and stability online evaluation;

After all regulation and control centers complete above-mentioned process, enter step 4);

When these regulation and control center is the regulation and control center being in the 1st grade of regulation and control layer, the described regulation and control center relevant to these regulation and control close centre is that all direct subordinates at these regulation and control center regulate and control center; When these regulation and control center is the regulation and control center being in other regulation and control layers, all direct subordinates that all direct subordinates except these regulation and control center that the immediate superior that the described regulation and control center relevant to these regulation and control close centre comprises these regulation and control center regulates and controls center, the immediate superior at these regulation and control center regulates and controls center regulate and control center and these regulation and control center regulate and control center.

What in Fig. 1, step 4 described is, be in the regulation and control center of the 1st grade of regulation and control layer, collect the safety and stability online evaluation result at other each regulation and control center at different levels, if each regulation and control centers at different levels of electrical network all meet safe and stable operation requirement for the safety and stability online evaluation result of the forecast failure collection of its direct defenses, then think that the current operating conditions of electrical network is safety and stability, each regulation and control center at different levels does not need to take Control Measure to the electrical network of its direct regulation and control, method ends, otherwise, enter step 5).

In Fig. 1, step 5 describes, and at each regulation and control centers at different levels of electrical network, carries out following process respectively:

First, the online preventive control candidate measure collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, by the M at these regulation and control center _i.jand the union of the online preventive control candidate measure collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre, as these regulation and control center calculation for F _i.jcandidate's measure collection M ' of electricity net safety stable online preventive control Optimized Measures _i.j;

Finally, based on the safety and stability online evaluation result that these regulation and control center is up-to-date, the M ' at these regulation and control center is calculated _i.jin each prevention and control candidate measure at S ' _i.junder for F _i.jthe Control performance standard of power grid security and stability;

After all regulation and control centers complete above-mentioned process, enter step 6).

The Control performance standard of described prevention and control candidate measure refers to that the ratio of the rear recruitment of electricity net safety stable nargin and the control cost of these prevention and control candidate measure is implemented in these prevention and control candidate measure.

In Fig. 1, step 6 describes, and at each regulation and control centers at different levels of electrical network, carries out following process respectively:

First, the Control performance standard of each candidate's measure is concentrated in candidate's measure that the safety and stability online preventive control Optimized Measures collecting the regulation and control center relevant to these regulation and control close centre calculates;

Then, when these regulation and control center is the regulation and control center being in the 1st grade of regulation and control layer, the M at these regulation and control center is calculated by formula (1) _i.jin the control performance overall target of each prevention and control candidate measure when multi-stage scheduling composite defense power grid security and stability; When these regulation and control center is the regulation and control center being in other regulation and control layers, calculated the M at these regulation and control center by formula (2) _i.jin the control performance overall target of each prevention and control candidate measure when multi-stage scheduling composite defense power grid security and stability;

${\mathrm{PI}}_{i.j.k}^{\′}={\mathrm{PI}}_{i.j.k}+\frac{1}{{\mathrm{\λ}}_u}\underset{l=1}{\overset{D_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{{i+1.d}_{i.j.l}.k},k=\mathrm{1,2},\·\·\·,K_{i.j}---\left(1\right)$

$\begin{array}{cc}{\mathrm{PI}}_{i.j.k}^{\′}={\mathrm{PI}}_{i.j.k}+{\mathrm{\λ}}_u{\mathrm{PI}}_{{i-1.u}_{i.j}.k}+\frac{1}{{\mathrm{\λ}}_u}\underset{l=1}{\overset{D_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{i+1.d_{i.j.l}.k}+{\mathrm{\λ}}_n\underset{l=1;l\≠j}{\overset{N_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{{i.n}_{i.j.l}.k}& k=\mathrm{1,2},\·\·\·,K_{i.j}---\left(2\right)\end{array}$

In formula, K _i.jfor M _i.jthe sum of middle prevention and control candidate measure, PI _i.j.kfor M _i.jthe prevention and control candidate measure of middle kth is used for for F _i.jthe Control performance standard of power grid security and stability, u _i.jfor sequence number in the heart in each regulation and control in the regulation and control floor of immediate superior regulation and control center residing for it at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at the immediate superior regulation and control center for these regulation and control center, D _i.jfor the sum at direct subordinate's regulation and control center at these regulation and control center, d _i.j.lfor sequence number in the heart in each regulation and control directly in the regulation and control floor of subordinate's regulation and control center residing for it of the l at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at l direct subordinate's regulation and control center for these regulation and control center, N _i.jfor the sum at direct subordinate's regulation and control center at the immediate superior regulation and control center at these regulation and control center, n _i.j.lfor sequence number in the heart in each regulation and control directly in the regulation and control floor of subordinate's regulation and control center residing for it of the l at the immediate superior regulation and control center at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at l direct subordinate's regulation and control center at the immediate superior regulation and control center for these regulation and control center, λ _ufor the coordinating factor between the superior and the subordinate's regulation and control center direct when multi-stage scheduling composite defense power grid security and stability, get the set point (being usually set to 1.5) being more than or equal to 1, λ _nfor belong to same immediate superior regulation and control center when multi-stage scheduling composite defense power grid security and stability difference regulation and control center between coordinating factor, get and be more than or equal to 1, be less than or equal to λ _uset point (being usually set to 1.25), PI ' _i.j.kfor M _i.jthe prevention and control candidate measure of middle kth is used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable.

After all regulation and control centers complete above-mentioned process, enter step 7).

In Fig. 1, step 7 describes, and at each regulation and control centers at different levels of electrical network, carries out following process respectively:

First, the online preventive control candidate measure collecting the regulation and control center direct regulation and control relevant to these regulation and control close centre concentrates each prevention and control candidate measure for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable, obtains the M ' at these regulation and control center _i.jin each prevention and control candidate measure be used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable;

Then, if the up-to-date safety and stability online evaluation result in these regulation and control center does not meet safe and stable operation requirement, then based on the M ' at these regulation and control center _i.jin each prevention and control candidate measure be used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable, for the S ' at these regulation and control center _i.j, calculate and meet F _i.jthe online preventive control Optimized Measures collection that lower safe and stable operation requires, as the online preventive control Optimized Measures collection DM of these regulation and control center process to be combined _i.j, otherwise, by the online preventive control Optimized Measures collection DM of process to be combined for these regulation and control center _i.jbe set to empty set.

After all regulation and control centers complete above-mentioned process, enter step 8);

The online preventive control Optimized Measures collection of described process to be combined comprise prevention and control equipment and control variables thereof, controlling party to and controlled quentity controlled variable.

In Fig. 2, step 8 describes, and at each regulation and control centers at different levels of electrical network, carries out following process respectively:

First, the online preventive control Optimized Measures collection of the regulation and control center to be combined process relevant to these regulation and control close centre is collected;

Then, for the M at these regulation and control center _i.jin each prevention and control equipment and control variables thereof, if it is at the DM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center to be combined process relevant to these regulation and control close centre 1 of concentrating gathers, then first by this prevention and control equipment and control variables thereof the controlling party in this set to and controlled quentity controlled variable, join the CM at these regulation and control center _i.jin, as the controlling party of this prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, then by CM _i.jin this prevention and control equipment and the final controlled quentity controlled variable of control variables thereof and the increment sum of controlled quentity controlled variable as new final controlled quentity controlled variable; If it is at the DM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center to be combined process relevant to these regulation and control close centre concentrate 2 and with in upper set, and its controlling party is to all identical in these set, then first by controlling party in these set of this prevention and control equipment and control variables thereof to the maximum in controlled quentity controlled variable, join the CM at these regulation and control center _i.jin, as the controlling party of this prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, then by CM _i.jin this prevention and control equipment and the final controlled quentity controlled variable of control variables thereof and the increment sum of controlled quentity controlled variable as new final controlled quentity controlled variable.

After all regulation and control centers complete above-mentioned process, enter step 9);

In Fig. 2, step 9 describes, and at each regulation and control centers at different levels of electrical network, carries out following process respectively:

First, the online preventive control Optimized Measures collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, according to the CM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center direct regulation and control relevant to these regulation and control close centre concentrates the controlling party of all prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, to the S ' at these regulation and control center _i.jcarry out adjusting and upgrading,

Finally, the S ' after upgrading for adjustment _i.j, carry out for F _i.jsafety and stability online evaluation.

After all regulation and control centers complete above-mentioned process, enter step 10).

What in Fig. 2, step 10 described is, be in the regulation and control center of the 1st grade of regulation and control layer, collect the safety and stability online evaluation result at other each regulation and control center at different levels, if the up-to-date safety and stability online evaluation result in each regulation and control centers at different levels of electrical network all meets power network safety operation requirement, then by the CM at each regulation and control center at different levels _i.jas the safety and stability online preventive control Optimized Measures that multi-stage scheduling is collaborative, method ends; Otherwise, enter step 11).

In Fig. 2, step 11 describes, being in the regulation and control center of the 1st grade of regulation and control layer, if the current time of operation of power networks and t ₀difference be less than setting duration (being usually set to 5 minutes), enter step 12), otherwise, think that search is less than the collaborative safety and stability online preventive control Optimized Measures of multi-stage scheduling, method ends.

In Fig. 2, step 12 describes, at each regulation and control centers at different levels of electrical network, first, from M _i.jmiddle rejecting and CM _i.jmiddle prevention and control equipment and the identical but controlling party of control variables thereof to contrary candidate's measure, and from M _i.jmiddle rejecting and CM _i.jmiddle prevention and control equipment and the identical and controlling party of control variables thereof to identical but candidate's measure that controlled amounts maximum is equal with the increment of controlled quentity controlled variable, then by M _i.jin with CM _i.jmiddle prevention and control equipment and the identical and controlling party of control variables thereof are set to the difference of this controlled amounts maximum and controlled quentity controlled variable increment to the controlled amounts maximum of identical candidate's measure, return step 5), carry out next round calculating.

Although the present invention with preferred embodiment openly as above, embodiment is not of the present invention for limiting.Without departing from the spirit and scope of the invention, any equivalence change done or retouching, belong to the protection range of the present invention equally.Therefore the content that protection scope of the present invention should define with the claim of the application is standard.

Claims (1)

1. the safety and stability online preventive control Study on Decision-making Method for Optimization that electrical network multi-stage scheduling is collaborative, is characterized in that, comprise the following steps:

1) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

According to its Real-time Collection or the operation of power networks state information collected, bonding apparatus model and parameter, generates the on-line operation mode data S of the electrical network of these regulation and control center direct regulation and control _i.j, and generate the forecast failure collection F of these regulation and control center direct defenses _i.jwith the online preventive control candidate measure collection M of direct regulation and control _i.j, by the online preventive control Optimized Measures collection CM of these regulation and control center direct regulation and control _i.jbe set to empty set;

Wherein, i=1,2,, I, I represent in electrical network the sum of the level regulating and controlling layer, i represents the level sequence number of the regulation and control layer in electrical network residing for each regulation and control center, and the 1st grade is highest, and the 2nd grade is the direct subordinate of the 1st grade, 1st grade is the immediate superior of the 2nd grade, and by that analogy, I level is lowermost level, j=1,2 ..., J _i, J _irepresent the sum at the regulation and control center being in i-th grade of regulation and control layer;

After all regulation and control centers complete above-mentioned process, enter step 2);

The regulation and control center being in the 1st grade of regulation and control layer only has 1, the regulation and control center being in other regulation and control layer at different levels has 1 at least, except being in the regulation and control center of the 1st grade of regulation and control layer, the immediate superior regulation and control center at other regulation and control center has and only has 1, and the number at direct subordinate's regulation and control center at each regulation and control center does not limit;

The online preventive control candidate measure collection of each regulation and control center direct regulations and controls at different levels of electrical network to refer under current operational mode that optional prevention and control equipment and control variables thereof, controlling party are to the set with controlled amounts maximum, and the common factors of the forecast failure collection of each regulation and control center direct defenses at different levels of electrical network are empty set;

The online preventive control Optimized Measures collection of each regulation and control center direct regulations and controls at different levels of electrical network refer to that prevention and control equipment selected under current operational mode and control variables thereof, controlling party are to the set of the increment of, final controlled quentity controlled variable and controlled quentity controlled variable, and the common factor that the online preventive control candidate measures of each regulation and control center direct regulations and controls at different levels of electrical network integrate is as empty set;

The increment of controlled quentity controlled variable refers in iterative process the controlled quentity controlled variable of often taking turns prevention and control equipment and the control variables thereof calculated;

2) at the regulation and control center being in the 1st grade of regulation and control layer, the current time of operation of power networks is designated as t ₀, enter step 3);

3) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the powernet running mode data of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, based on the S at these regulation and control center _i.jin conjunction with the powernet running mode data of the regulation and control center direct regulation and control relevant to these regulation and control close centre, the running mode data of carrying out towards electricity net safety stable online evaluation integrates process, generates the powernet running mode data S ' carrying out safety and stability online evaluation for these regulation and control center comprising the electrical network of these regulation and control center direct regulation and control and the electrical network of the regulation and control center direct regulation and control relevant to these regulation and control close centre _i.j;

Finally, according to the S ' at these regulation and control center _i.j, for the F at these regulation and control center _i.jcarry out safety and stability online evaluation;

After all regulation and control centers complete above-mentioned process, enter step 4);

When these regulation and control center is the regulation and control center being in the 1st grade of regulation and control layer, the described regulation and control center relevant to these regulation and control close centre is that all direct subordinates at these regulation and control center regulate and control center; When these regulation and control center is the regulation and control center being in other regulation and control layers, all direct subordinates that all direct subordinates except these regulation and control center that the immediate superior that the described regulation and control center relevant to these regulation and control close centre comprises these regulation and control center regulates and controls center, the immediate superior at these regulation and control center regulates and controls center regulate and control center and these regulation and control center regulate and control center;

4) at the regulation and control center being in the 1st grade of regulation and control layer, collect the safety and stability online evaluation result at other each regulation and control center at different levels, if each regulation and control centers at different levels of electrical network all meet safe and stable operation requirement for the safety and stability online evaluation result of the forecast failure collection of its direct defenses, then think that the current operating conditions of electrical network is safety and stability, each regulation and control center at different levels does not need to take Control Measure to the electrical network of its direct regulation and control, method ends, otherwise, enter step 5);

5) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the online preventive control candidate measure collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, by the M at these regulation and control center _i.jand the union of the online preventive control candidate measure collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre, as these regulation and control center calculation for F _i.jcandidate's measure collection M ' of electricity net safety stable online preventive control Optimized Measures _i.j;

Finally, based on the safety and stability online evaluation result that these regulation and control center is up-to-date, the M ' at these regulation and control center is calculated _i.jin each prevention and control candidate measure at S ' _i.junder for F _i.jthe Control performance standard of power grid security and stability;

After all regulation and control centers complete above-mentioned process, enter step 6);

The Control performance standard of prevention and control candidate measure refers to that the ratio of the rear recruitment of electricity net safety stable nargin and the control cost of these prevention and control candidate measure is implemented in these prevention and control candidate measure;

6) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the Control performance standard of each candidate's measure is concentrated in candidate's measure that the safety and stability online preventive control Optimized Measures collecting the regulation and control center relevant to these regulation and control close centre calculates;

Then, when these regulation and control center is the regulation and control center being in the 1st grade of regulation and control layer, the M at these regulation and control center is calculated by formula (1) _i.jin the control performance overall target of each prevention and control candidate measure when multi-stage scheduling composite defense power grid security and stability; When these regulation and control center is the regulation and control center being in other regulation and control layers, calculated the M at these regulation and control center by formula (2) _i.jin the control performance overall target of each prevention and control candidate measure when multi-stage scheduling composite defense power grid security and stability;

${\mathrm{PI}}_{i.j.k}^{\′}={\mathrm{PI}}_{i.j.k}+\frac{1}{{\mathrm{\λ}}_u}\underset{l=1}{\overset{D_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{i+1.d_{i.j.l}.k},k=\mathrm{1,2},...,K_{i.j}---\left(\text{1}\right)$

${\mathrm{PI}}_{i.j.k}^{\′}={\mathrm{PI}}_{i.j.k}+{\mathrm{\λ}}_u{\mathrm{PI}}_{i-1.u_{i.j}.k}+\frac{1}{{\mathrm{\λ}}_u}\underset{l=1}{\overset{D_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{i+1.d_{i.j.l}.k}+{\mathrm{\λ}}_n\underset{l=1;l\≠j}{\overset{N_{i.j}}{\mathrm{\Σ}}}{\mathrm{PI}}_{i.n_{i,j.l}.k},k=\mathrm{1,2},...,K_{i.j}---\left(\text{2}\right)$

In formula, K _i.jfor M _i.jthe sum of middle prevention and control candidate measure, PI _i.j.kfor M _i.jthe prevention and control candidate measure of middle kth is used for for F _i.jthe Control performance standard of power grid security and stability, u _i.jfor sequence number in the heart in each regulation and control in the regulation and control floor of immediate superior regulation and control center residing for it at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at the immediate superior regulation and control center for these regulation and control center, D _i.jfor the sum at direct subordinate's regulation and control center at these regulation and control center, d _i.j.lfor sequence number in the heart in each regulation and control directly in the regulation and control floor of subordinate's regulation and control center residing for it of the l at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at l direct subordinate's regulation and control center for these regulation and control center, N _i.jfor the sum at direct subordinate's regulation and control center at the immediate superior regulation and control center at these regulation and control center, n _i.j.lfor sequence number in the heart in each regulation and control directly in the regulation and control floor of subordinate's regulation and control center residing for it of the l at the immediate superior regulation and control center at these regulation and control center, for M _i.jthe prevention and control candidate measure of middle kth is used for the Control performance standard of the power grid security and stability of the forecast failure collection of the direct defenses at l direct subordinate's regulation and control center at the immediate superior regulation and control center for these regulation and control center, λ _ufor the coordinating factor between the superior and the subordinate's regulation and control center direct when multi-stage scheduling composite defense power grid security and stability, get the set point being more than or equal to 1, λ _nfor belong to same immediate superior regulation and control center when multi-stage scheduling composite defense power grid security and stability difference regulation and control center between coordinating factor, get and be more than or equal to 1, be less than or equal to λ _uset point, PI ' _i.j.kfor M _i.jthe prevention and control candidate measure of middle kth is used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable;

After all regulation and control centers complete above-mentioned process, enter step 7);

7) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the online preventive control candidate measure collecting the regulation and control center direct regulation and control relevant to these regulation and control close centre concentrates each prevention and control candidate measure for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable, obtains the M ' at these regulation and control center _i.jin each prevention and control candidate measure be used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable;

Then, if the up-to-date safety and stability online evaluation result in these regulation and control center does not meet safe and stable operation requirement, then based on the M ' at these regulation and control center _i.jin each prevention and control candidate measure be used for the control performance overall target of multi-stage scheduling composite defense electricity net safety stable, for the S ' at these regulation and control center _i.j, calculate and meet F _i.jthe online preventive control Optimized Measures collection that lower safe and stable operation requires, as the online preventive control Optimized Measures collection DM of these regulation and control center process to be combined _i.j, otherwise, by the online preventive control Optimized Measures collection DM of process to be combined for these regulation and control center _i.jbe set to empty set;

After all regulation and control centers complete above-mentioned process, enter step 8);

The online preventive control Optimized Measures collection of described process to be combined comprise prevention and control equipment and control variables thereof, controlling party to and controlled quentity controlled variable;

8) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the online preventive control Optimized Measures collection of the regulation and control center to be combined process relevant to these regulation and control close centre is collected;

Then, for the M at these regulation and control center _i.jin each prevention and control equipment and control variables thereof, if it is at the DM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center to be combined process relevant to these regulation and control close centre 1 of concentrating gathers, then first by this prevention and control equipment and control variables thereof the controlling party in this set to and controlled quentity controlled variable, join the CM at these regulation and control center _i.jin, as the controlling party of this prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, then by CM _i.jin this prevention and control equipment and the final controlled quentity controlled variable of control variables thereof and the increment sum of controlled quentity controlled variable as new final controlled quentity controlled variable; If it is at the DM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center to be combined process relevant to these regulation and control close centre concentrate 2 and with in upper set, and its controlling party is to all identical in these set, then first by controlling party in these set of this prevention and control equipment and control variables thereof to the maximum in controlled quentity controlled variable, join the CM at these regulation and control center _i.jin, as the controlling party of this prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, then by CM _i.jin this prevention and control equipment and the final controlled quentity controlled variable of control variables thereof and the increment sum of controlled quentity controlled variable as new final controlled quentity controlled variable;

After all regulation and control centers complete above-mentioned process, enter step 9);

9) at each regulation and control centers at different levels of electrical network, following process is carried out respectively:

First, the online preventive control Optimized Measures collection of the regulation and control center direct regulation and control relevant to these regulation and control close centre is collected;

Then, according to the CM at these regulation and control center _i.jand the online preventive control Optimized Measures of the regulation and control center direct regulation and control relevant to these regulation and control close centre concentrates the controlling party of all prevention and control equipment and control variables thereof to the increment with controlled quentity controlled variable, to the S ' at these regulation and control center _i.jcarry out adjusting and upgrading,

Finally, the S ' after upgrading for adjustment _i.j, carry out for F _i.jsafety and stability online evaluation;

After all regulation and control centers complete above-mentioned process, enter step 10);

10) at the regulation and control center being in the 1st grade of regulation and control layer, collect the safety and stability online evaluation result at other each regulation and control center at different levels, if the up-to-date safety and stability online evaluation result in each regulation and control centers at different levels of electrical network all meets power network safety operation requirement, then by the CM at each regulation and control center at different levels _i.jas the safety and stability online preventive control Optimized Measures that multi-stage scheduling is collaborative, method ends; Otherwise, enter step 11);

11) at the regulation and control center being in the 1st grade of regulation and control layer, if the current time of operation of power networks and t ₀difference be less than setting duration, enter step 12), otherwise, think that search is less than the collaborative safety and stability online preventive control Optimized Measures of multi-stage scheduling, method ends.

12) at each regulation and control centers at different levels of electrical network, first, from M _i.jmiddle rejecting and CM _i.jmiddle prevention and control equipment and the identical but controlling party of control variables thereof to contrary candidate's measure, and from M _i.jmiddle rejecting and CM _i.jmiddle prevention and control equipment and the identical and controlling party of control variables thereof to identical but candidate's measure that controlled amounts maximum is equal with the increment of controlled quentity controlled variable, then by M _i.jin with CM _i.jmiddle prevention and control equipment and the identical and controlling party of control variables thereof are set to the difference of this controlled amounts maximum and controlled quentity controlled variable increment to the controlled amounts maximum of identical candidate's measure, return step 5), carry out next round calculating.