CN107482615B - Control method for high-energy-carrying enterprise power grid after load loss is taken into consideration - Google Patents
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
The invention discloses a control method for accounting lost load of a power grid of a high-energy-carrying enterprise, and belongs to the technical field of safety and stability control of a power system. The method adopts three levels, firstly monitors the active power of the high-energy-carrying load, the signal information of the voltage load node, the switching-in and stopping information of the tie line and the active power and the switching-in and stopping information of each unit in real time, then calculates the switching-out capacity according to three conditions that the voltage load node signal sent by the high-energy-carrying load control system is received by the stability control device, the voltage load node signal sent by the high-energy-carrying load control system is not received by the stability control device and the uploaded load loss signal is not received by the stability control device at the tie line, and cuts out the corresponding unit according to the set switching-out principle. The invention can effectively solve the matching problem of action time and control quantity, has high reliability and practical value, can improve the performance of a safety and stability control system and ensure the safe and stable operation of an enterprise power grid.
Description
Technical Field
The invention belongs to the technical field of safety and stability control of power systems, and particularly relates to a control method for a high-energy-carrying enterprise power grid after load loss.
Background
High energy-carrying enterprises are important industrial loads, and enterprises for electrolysis, smelting and the like are typical high energy-carrying enterprises. The high energy-carrying enterprise power grid generally consists of a high energy-carrying load and a self-contained power plant, and is connected with a main grid through a connecting line, and the input and output power of the connecting line is often strictly limited. Because the unit and the load capacity in the enterprise power grid are generally large, when the unit and the load are disconnected, the transmission power of the tie line is easily out of limit, if the fault is not timely and effectively processed, the tie line can be disconnected, the safe and stable operation of the enterprise power grid is influenced, the enterprise power grid is broken down seriously, production accidents are caused, and huge economic loss is brought to the enterprise.
In order to avoid the danger caused by the out-of-limit of the power of the tie line, the power grid of the high energy-carrying enterprise is generally provided with a safety and stability control (stability control and safety control for short) system. A safety and stability control system in an existing enterprise power grid monitors a tie line power value in real time, when the power value exceeds a set delay, the stability control system acts, and the acting amount is based on the power exceeding a tie line threshold at the acting moment. However, in practical situations, when a large percentage of unit, load shedding faults occur, the enterprise grid experiences a long dynamic process. The delay action time of the connecting line is prolonged, so that the dynamic process after the fault of the enterprise power grid is avoided, and more accurate out-of-limit quantity is obtained, but the delay action time is not suitable for the safe and stable operation of the power grid; the delay action time of the connecting line is shortened, the processing of power grid accidents is accelerated, the influence of faults on the power grid can be effectively reduced, and the risk of safety control over-cut or under-cut is increased due to short delay. The action amount formulated by the existing stability control device is low in reliability, influences the control effect of the stability control system and is not beneficial to the safety production of enterprises.
Disclosure of Invention
The invention aims to: aiming at the actual situation after the power grid of the high energy-carrying enterprise loses the load, a control method for the power grid of the high energy-carrying enterprise after the load loss is taken into consideration is provided.
Specifically, the invention is realized by adopting the following technical scheme, which comprises the following steps:
1) the power grid stability control system monitors active power of a high-energy-carrying load, voltage load node signal information, tie line switching and stopping information, real-time transmission active power and switching and stopping information of each unit in real time, wherein the voltage load node signal information is sent by the high-energy-carrying load control system;
2) after receiving the voltage load node signal sent by the high energy load control system, the stability control device delays the time T1The method comprises the steps of internally monitoring the change condition of load power, recording the sudden change starting time of the electrical quantity as T0 time, and the time of receiving a pressure load node signal sent by a high-load-capacity load control system as T1 time, comparing the load input section power at T0 time before the T0 time with the power at T1 time after the T1 time, judging that the load is large in proportion and rapidly quitting if the comparison result meets the condition of formula (1), and calculating the load loss quantity as shown in formula (2):
wherein, Pload(t0-T0) The load is subjected to the section power P0 time before the time T0load(t1+T1) The load input section power at the time T1 after the time T1, a% is a set comparison threshold value,
the load loss is the amount of load loss;
then calculating the capacity of the cutter as shown in the formula (3), and cutting according to the set principle of the cutter set
Capacity related units:
wherein:
for the capacity of the cutter, k1 is a set proportionality coefficient.
The technical scheme is further characterized by further comprising the following steps:
if the voltage load node signal sent by the high energy-carrying load control system is not received by the stability control device, after the time T2 is suddenly started by the electric quantity, the calculated load loss quantity is as shown in formula (4):
wherein t0 is the electric quantity sudden change starting time; pload(t0+T2) Load input section power for the time of starting T2 for electric quantity abrupt change;
then, comparing the load loss with the loss load setting value judged by the stable control device, and if the load loss is
Greater than the stable control device judgment loss load setting value Pload，setUploading the load loss signal to a stability control device at the connecting line; after receiving the load loss signal, the stability control device at the position of the connecting line monitors the transmission power of the connecting line in real time, and when the real-time power of the connecting line meets the condition of the formula (5), the capacity of the generator tripping is calculated
Cutting off the corresponding unit according to a cutter principle set according to the formula (6):
wherein, Plur(t) is the real-time power of the tie-line,
setting a maximum transmission power set value of a stable control device tie line; t2 is the maximum output power of the tie line when the measured value of the tie line power is greater than the maximum output power of the tie line of the stable control device after receiving the load loss signalInitial time of constant value; t3 is the set duration; k2 is a set scaling factor.
The technical scheme is further characterized by further comprising the following steps:
if the steady control device at the position of the connecting line does not receive the uploaded load loss signal, monitoring the transmission power of the connecting line in real time, and cutting off the corresponding unit according to a set cutter principle when the real-time power of the connecting line meets the condition of a formula (7), wherein the cutter capacity is the capacity of the cutter
As shown in formula (8):
wherein t3 is the initial time at which the tie line power measurement is greater than the tie line maximum transmit power setpoint; t4 is the set duration; plur(t3+T4) Real-time power for the tie-line at time T4 after time T3; k3 is a set scaling factor.
The technical scheme is further characterized in that T1 is 200ms-300ms, and T0 is 200 ms; the a% is 20-40%, and the k1 value is 0.9-1.2.
The technical scheme is further characterized in that T2 is 200-400ms, T3 is 20-200ms, and k2 is between 0.9 and 1.2.
The technical scheme is further characterized in that T4 is 1-10S, and the value of k3 is 0.9-1.2.
By adopting the technical scheme, the invention achieves the following technical effects: the method adopts three levels, firstly monitors the active power of the high-energy-carrying load, the signal information of the voltage load node, the switching-in and stopping information of the tie line and the active power and the switching-in and stopping information of each unit in real time, then calculates the switching-out capacity according to three conditions that the voltage load node signal sent by the high-energy-carrying load control system is received by the stability control device, the voltage load node signal sent by the high-energy-carrying load control system is not received by the stability control device and the uploaded load loss signal is not received by the stability control device at the tie line, and cuts out the corresponding unit according to the set switching-out principle. The invention can effectively solve the matching problem of action time and control quantity, has high reliability and practical value, can improve the performance of a safety and stability control system and ensure the safe and stable operation of an enterprise power grid.
Drawings
Fig. 1 is a typical configuration diagram of a high-energy-carrying enterprise power grid.
Fig. 2 is a main flow diagram of the method of the present invention.
Fig. 3 is a link line transmission power graph.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and examples.
Fig. 2 shows the main process of the method of the present invention, which specifically comprises:
step 1: the high-energy-carrying enterprise power grid stability control system monitors the high-energy-carrying load active power in real time, information such as a voltage load node signal sent by the high-energy-carrying load control system, information such as tie line switching and stopping and real-time transmission active power, and information such as active power and switching and stopping of each unit.
Step 2: after the stable control device receives the voltage load node signal sent by the high energy load control system, the stable control device delays the time T1The method comprises the steps of internally monitoring the change condition of load power, comparing the power of a load section received at the time T0 before the time T0 when the electric quantity is suddenly started with the power at the time T1 after the time T1 when a high-energy-load node signal sent by a control system is received, judging that the load is large in proportion and rapidly quitting if the comparison result meets the condition of the formula (1), and calculating the load loss quantity as shown in the formula (2).
Wherein, Pload(t0-T0) The load is subjected to the section power P0 time before the time T0load(t1+T1) The load input section power at the time T1 after the time T1, a% is a set comparison threshold value,
the load loss is the amount of load loss.
In order to prevent the load from stopping completely and non-immediately, T1 is preferably set to be 200ms-300 ms; pre-accident T0 is typically 200 ms; the a% is 20-40% in general.
Then calculating the capacity of the cutter as shown in the formula (3), and cutting according to the set principle of the cutter set
Capacity related units.
Wherein:
for the capacity of the cutting machine, k1 is a proportionality coefficient, and the value is between 0.9 and 1.2.
Since the voltage load node signal sent by the high energy load control system may not be successfully transmitted to the stability control device in actual operation, step 3 is set.
And step 3: if the voltage load node signal sent by the high energy-carrying load control system is not received by the stability control device, after the time T2 is suddenly started by the electric quantity, the calculated load loss quantity is as shown in formula (4):
wherein t0 is the electric quantity sudden change starting time; pload(t0+T2) Load input section power for the time of starting T2 for electric quantity abrupt change; t2 generally takes on the value of 200 and 400 ms.
Then, comparing the load loss with the loss load setting value judged by the stable control device, and if the load loss is
Greater than the stable control device judgment loss load setting value Pload，setAnd uploading the load loss signal to a stability control device at the connecting line. After receiving the load loss signal, the stability control device at the position of the connecting line monitors the transmission power of the connecting line in real time, and when the real-time power of the connecting line meets the condition of the formula (5), the capacity of the generator tripping is calculated
And (4) cutting off the corresponding unit according to a formula (6) and a set cutter principle.
Wherein, Plur(t) is the real-time power of the tie-line,
setting a maximum transmission power set value of a stable control device tie line; t2 is the initial time when the measured value of the tie line power is greater than the set value of the maximum output power of the tie line of the stability control device after receiving the load loss signal; t3 is a set duration, generally 20-200 ms; k2 is a proportionality coefficient with a value of 0.9-1.2.
In order to prevent abnormal communication between the stability control device of the high-energy-load station and the stability control device of the tie line station, which results in that the load loss amount cannot be transmitted, step 4 is provided.
And 4, step 4: and (3) if the steady control device at the connecting line does not receive the load loss signal uploaded in the step (3), monitoring the transmission power of the connecting line in real time, and cutting off the corresponding unit according to a set cutting machine principle when the real-time power of the connecting line meets the condition of the formula (7), wherein the cutting machine capacity is shown as the formula (8).
Wherein t3 is the initial time at which the tie line power measurement is greater than the tie line maximum transmit power setpoint; t4 is a set duration, and the set value is generally larger, preferably 1-10S, because T4 needs to avoid the dynamic process after load off-line; plur(t3+T4) Real-time power for the tie-line at time T4 after time T3; k3 is a proportionality coefficient with a value of 0.9-1.2.
A specific example is given below.
Example 1:
fig. 1 is a typical configuration diagram of a high-energy-carrying enterprise power grid, which includes two power plants G1 and G2, the two power plants include 8 units, which are numbered from #1 unit to #8 unit in sequence, and the high-energy-carrying load includes 5 units, which are numbered from L1 to L5 in sequence. The method is used for controlling the power grid of the high-energy-carrying enterprise according to the following steps after the condition of load loss is considered.
Step 1: the high-energy-carrying enterprise stability control system monitors the power and other running state information of power plants G1 and G2, high-energy-carrying loads L1, L2, L3, L4, L5 and connecting lines in real time. Assume that the unit, load and tie line states 200ms before the fault is detected are as follows:
power plant G1#1 machine group sending power (313.6MW)
Power plant G1#2 machine group sending power (312.2MW)
Power plant G1#3 machine group sending power (315.2MW)
Power plant G1#4 machine group sending power (316.3MW)
Power plant G2#5 machine group delivery power (259.9MW)
Power plant G2#6 machine group delivery power (259.3MW)
Power plant G2# 7 machine group sending power (260.8MW)
Power plant G2#8 machine group sending power (190.3MW)
High energy carrying load L1: input power (300.0MW)
High energy carrying load L2: input power (700.0MW)
High energy carrying load L3: received power (600.0MW)
High energy-carrying load L4: receiving power (250.6MW)
High energy-carrying load L5: receiving power (693.0MW)
The tie-line is powered by 16 MW.
Step 2: when the high-energy-carrying load L2 in FIG. 1 has a disconnection fault, the high-energy-carrying load control system sends a voltage load node signal to the stability control device, after the stability control device receives the voltage load node signal, the stability control device compares the monitored load power with that before the fault, quickly judges whether the load is rapidly withdrawn in a large proportion, calculates the disconnection power of the load if the load is determined to be withdrawn in a large proportion, calculates the amount of machine switching according to the disconnection power, and cuts off the corresponding machine set according to the set principle of machine switching.
For example, in this example, the load incoming section power measurement value 1543.6MW at 300ms after the load node signal is pressed by the high energy load control system is compared with the 200ms power 2243.6MW before the sudden start of the electrical quantity, and whether the load off-line ratio is out of limit is judged. If the out-of-limit ratio is set to 20%, then (2243.6-1543.6)/2243.6 is greater than 20%, the calculated cutting amount is 1.0 × (2243.6-1543.6) ═ 700MW, and the proportionality coefficient is taken to be 1. And finally cutting off the 700MW unit according to a set cutter principle.
And step 3: and if the stable control device does not receive the high-energy-load control system voltage load node signal, calculating the load loss according to the formula (4). And then judging whether the load loss exceeds a set value of the stability control device, and if the load loss exceeds the set value of the stability control device, sending a loss signal to the stability control device at the connecting line. And (3) after the tie line stability control device receives the load loss signal, monitoring the transmission power of the tie line in real time, if the real-time power of the tie line meets the condition of the formula (5), calculating the tripping capacity according to the formula (6), and tripping the corresponding unit according to a set tripping principle.
Assuming that the load loss set value of the steady control device is 300MW, the calculated offline power is 2243.6-1543.6 which is 700MW, and 700 is larger than 300, a load loss quantity signal is transmitted to the steady control device at the position of a connecting line, the power of the connecting line in 1s is monitored as shown in figure 3, then the power of the connecting line is judged, the condition of formula (5) is satisfied, and the generator tripping capacity is calculated to be 1.0 which is 700 MW. And the stable control device at the connecting line cuts out the 700MW unit according to the set cutter principle.
And 4, step 4: and if the steady control device at the connecting line does not receive the load loss signal, monitoring the transmission power of the connecting line in real time, wherein the real-time power meets the condition of formula (7), calculating the cutting amount shown in formula (8), and cutting off the corresponding unit by the steady control device at the connecting line according to the set cutting principle.
Although the present invention has been described in terms of the preferred embodiment, it is not intended that the invention be limited to the embodiment. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the present invention. The scope of the invention should therefore be determined with reference to the appended claims.
Claims (6)
1. A control method for a high-energy-carrying enterprise power grid after load loss is considered is characterized by comprising the following steps:
1) the power grid stability control system monitors active power of a high-energy-carrying load, voltage load node signal information, tie line switching and stopping information, real-time transmission active power and switching and stopping information of each unit in real time, wherein the voltage load node signal information is sent by the high-energy-carrying load control system;
2) after receiving the voltage load node signal sent by the high energy load control system, the stability control device delays the time T1The method comprises the steps of internally monitoring the change condition of load power, recording the sudden change starting time of the electrical quantity as T0 time, recording the time of receiving a pressure load node signal sent by a high-energy-carrying load control system as T1 time, comparing the load input section power at T0 time before the T0 time with the power at T1 time after the T1 time, judging that the load is large in proportion and rapidly quitting if the comparison result meets the condition of formula (1), and calculating the load loss quantity as shown in formula (2)：
Wherein, Pload(t0-T0) The load is subjected to the section power P0 time before the time T0load(t1+T1) The load input section power at the time T1 after the time T1, a% is a set comparison threshold value,
the load loss is the amount of load loss;
then calculating the capacity of the cutter as shown in the formula (3), and cutting according to the set principle of the cutter set
Capacity related units:
wherein:
for the capacity of the cutter, k1 is a set proportionality coefficient.
2. The control method for accounting the lost load of the high-energy-carrying enterprise power grid according to claim 1, further comprising the following steps:
if the voltage load node signal sent by the high energy-carrying load control system is not received by the stability control device, after the time T2 is suddenly started by the electric quantity, the calculated load loss quantity is as shown in formula (4):
wherein t0 is the electric quantity sudden change starting time; pload(t0+T2) Load input section power for the time of starting T2 for electric quantity abrupt change;
then, comparing the load loss with the loss load setting value judged by the stable control device, and if the load loss is
Greater than the stable control device judgment loss load setting value Pload,setUploading the load loss signal to a stability control device at the connecting line; after receiving the load loss signal, the stability control device at the position of the connecting line monitors the transmission power of the connecting line in real time, and when the real-time power of the connecting line meets the condition of the formula (5), the capacity of the generator tripping is calculated
Cutting off the corresponding unit according to a cutter principle set according to the formula (6):
wherein, Plur(t) is the real-time power of the tie-line,
setting a maximum transmission power set value of a stable control device tie line; t2 is the initial time when the measured value of the tie line power is greater than the set value of the maximum output power of the tie line of the stability control device after receiving the load loss signal; t3 is the set duration; k2 is a set scaling factor.
3. The control method for accounting the lost load of the high-energy enterprise power grid according to claim 2, further comprising the following steps:
if the steady control device at the position of the connecting line does not receive the uploaded load loss signal, monitoring the transmission power of the connecting line in real time, and cutting off the corresponding unit according to a set cutter principle when the real-time power of the connecting line meets the condition of a formula (7), wherein the cutter capacity is the capacity of the cutter
As shown in formula (8):
wherein t3 is the initial time at which the tie line power measurement is greater than the tie line maximum transmit power setpoint; t4 is the set duration; plur(t3+T4) Real-time power for the tie-line at time T4 after time T3; k3 is a set scaling factor.
4. The control method for the high-energy-carrying enterprise power grid with the load loss calculation function according to any one of claims 1 to 3, wherein T1 is 200ms-300ms, and T0 is 200 ms; the a% is 20-40%, and the k1 value is 0.9-1.2.
5. The method as claimed in claim 2, wherein T2 is 200-400ms, T3 is 20-200ms, and k2 is 0.9-1.2.
6. The method for controlling the power grid loss load of the high-energy-carrying enterprise according to claim 3, wherein T4 is 1-10S, and the value of k3 is 0.9-1.2.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354987A (en) * | 2011-09-28 | 2012-02-15 | 南京南瑞继保电气有限公司 | Control method of overload load-shedding for transformer or circuit |
| CN103078326A (en) * | 2012-12-28 | 2013-05-01 | 中国电力科学研究院 | Optimization method for improving safety and stability of grid frequency |
| CN103248055A (en) * | 2013-05-13 | 2013-08-14 | 南京南瑞集团公司 | Method for solving accurate selecting and changing of generator and load after regional power grid splitting |
| CN103474988A (en) * | 2013-09-10 | 2013-12-25 | 国电南瑞科技股份有限公司 | Emergency control optimization method of electrolytic aluminum self-prepared power grid and based on transient state safety and stability |
-
2017
- 2017-04-06 CN CN201710221574.5A patent/CN107482615B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354987A (en) * | 2011-09-28 | 2012-02-15 | 南京南瑞继保电气有限公司 | Control method of overload load-shedding for transformer or circuit |
| CN103078326A (en) * | 2012-12-28 | 2013-05-01 | 中国电力科学研究院 | Optimization method for improving safety and stability of grid frequency |
| CN103078326B (en) * | 2012-12-28 | 2014-09-10 | 中国电力科学研究院 | Optimization method for improving safety and stability of grid frequency |
| CN103248055A (en) * | 2013-05-13 | 2013-08-14 | 南京南瑞集团公司 | Method for solving accurate selecting and changing of generator and load after regional power grid splitting |
| CN103474988A (en) * | 2013-09-10 | 2013-12-25 | 国电南瑞科技股份有限公司 | Emergency control optimization method of electrolytic aluminum self-prepared power grid and based on transient state safety and stability |
Non-Patent Citations (2)
| Title |
|---|
| 电网安全稳定控制装置线路故障跳闸判据的改进;董希建 等;《电力系统保护与控制》;20140601;第42卷(第11期);第73-78页 * |
| 稳定控制装置故障跳闸判据在特高压交流电网中的应用;徐海波 等;《电力系统保护与控制》;20151201;第43卷(第23期);第148-153页 * |
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