CN103606930A - Method for controlling automatic delivery of currents for first time running of double-transformer power supply system - Google Patents
Method for controlling automatic delivery of currents for first time running of double-transformer power supply system Download PDFInfo
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- CN103606930A CN103606930A CN201310637744.XA CN201310637744A CN103606930A CN 103606930 A CN103606930 A CN 103606930A CN 201310637744 A CN201310637744 A CN 201310637744A CN 103606930 A CN103606930 A CN 103606930A
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Abstract
The invention discloses a method for controlling automatic delivery of currents for the first time running of a double-transformer power supply system. The running states of the double-transformer power supply system is controlled by controlling a first high-voltage circuit breaker C1, a second high-voltage circuit breaker C2, a first low-voltage circuit breaker 1DL, a second low-voltage circuit breaker 2DL, a third low-voltage circuit breaker 3DL and the like of the double-transformer power supply system to be in the states of off-position and on-position, the double-transformer power supply system is made to be in the most economical running state by adjusting the double-transformer power supply system according to the monitoring of the states of the double-transformer power supply system, and the purpose of saving energy is achieved. The method for controlling the automatic delivery of the currents for the first time running of the double-transformer power supply system has the advantages of enabling the double-transformer power supply system to run in the running mode with optimum energy-saving effects after the current is delivered, and being simple, easy to operate and capable of saving energy and the like.
Description
Technical field
The present invention relates to a kind of automatic power transmission control method of operation first of dual transformer electric power system.
Background technology
For the supplying electricity and power distribution room of larger enterprise, factories and miness, according to load needs, 2 and above transformer are installed, to guarantee power supply reliability.Low-voltage power supply conventionally adopts bus and connects mode, and normal operational mode is that every transformer is independently-powered, and every transformer is according to its part throttle characteristics, and low year rate, no-load ratio are higher.According to field survey statistics, the transformer energy loss causing because of low year rate and no-load ratio accounts for 15.6% of monthly actual power consumption.Transformer is in operation, if daily load increase and decrease is very large or load to be cyclic variation very large, should adjust in time the transformer number of units putting into operation, take rational way of economic operation, to obtain good economic benefit.For example: when 2 transformers can be realized split operation, when whole system load drops to certain value, by 1 transformer-supplied, can meet the demands; When system loading rises to certain value, enable 2 and above transformer and power simultaneously and just can meet the demands.The input of transformer and excision work are commanded automatically by automatic control equipment, and the changes of operating modes of transformer just relates to the switching of control switch, need to pass through automatic control system, many transformers are participated in to power supply in most economical mode, could realize distribution system energy-saving automatic.
In prior art, switching to transformer normal operating mode, normal conditions are according to the load parameter of instrument measurement or the actual load equipment putting into operation, in conjunction with transformer economic operation condition, by staff, judged, output operation order, then realize manual switchover by a series of grid switching operation, to reach energy-conservation object.This traditional Artificial Control method has many deficiencies:
(1) because parallel operation of transformers has strict condition restriction, and by the accuracy of artificial judgment, be subject to the impact of many objective factors, as some unavoidable reasons such as the error of instrument itself, error in reading, time error, electrical equipment action error and staff's professional standards, cause switching transformer timely and accurately, do not reach the object of economical operation, even because of error in judgement, there is the phenomenon of misoperation, bring hidden danger to the safety of personnel and equipment;
(2) operating manually this control model needs operator on duty to participate in the overall process, and has hindered the development of unattended operation transformer and distribution power station, makes transformation and distribution system be difficult to accomplish real automation.
Summary of the invention
The present invention is the weak point existing in above-mentioned prior art for avoiding, and provides a kind of automatic power transmission control method of operation first of dual transformer electric power system, so that can move under the operational mode of maximum energy-saving after dual transformer electric power system power transmission.
The present invention be technical solution problem by the following technical solutions.
A kind of automatic power transmission control method of operation first of dual transformer electric power system, be characterized in, as shown in Figure 2, described dual transformer electric power system comprises 10KV bus, the first primary cut-out C1, the second primary cut-out C2, a 500kVA transformer T1, the 2nd 500kVA transformer T2, the first low-voltage circuit breaker 1DL, the second low-voltage circuit breaker 2DL and the 3rd low-voltage circuit breaker 3DL, 0.4kV I section bus and 0.4kV II section bus; Between described 10KV bus and a 500kVA transformer T1, by the first primary cut-out C1, be connected, between described 10KV bus and the 2nd 500kVA transformer T2, by the second primary cut-out C2, be connected; Between described 0.4kV I section bus and a 500kVA transformer T1, by the first low-voltage circuit breaker 1DL, be connected, between described 0.4kV II section bus and the 2nd 500kVA transformer T2, by the second low-voltage circuit breaker 2DL, be connected; Between described 0.4kV I section bus and described 0.4kV II section bus, by the 3rd low-voltage circuit breaker 3DL, be connected;
Dual transformer electric power system has four kinds of running statuses: a 500kVA transformer T1 isolated operation state, the 2nd 500kVA transformer T2 isolated operation state, two transformer split operation states and two parallel operation of transformers states;
Moving first automatic power transmission control method comprises the steps:
Step 1: after 10KV bus incoming call, electric power system can, according to current all on off states, judge whether to meet described four kinds of running statuses; If meet one of described four kinds of running statuses, automatically transfer met predetermined running state to, start to carry out economical operation status monitoring; If do not meet any predetermined running state in described four kinds of running statuses, automatically carry out step 2;
Step 2: according to the on off state of the 3rd low-voltage circuit breaker 3DL, judge that whether the 3rd low-voltage circuit breaker 3DL is in gate-dividing state; If the 3rd low-voltage circuit breaker 3DL, in gate-dividing state, carry out step 3 automatically; If the 3rd low-voltage circuit breaker 3DL is in "on" position, electric power system sends separating brake order to the 3rd low-voltage circuit breaker 3DL, after the 3rd low-voltage circuit breaker 3DL separating brake success, carry out step 3;
Step 3: according to the on off state of the first primary cut-out C1, judge that a 500kVA transformer T1 high side switch, whether in "on" position, if the first primary cut-out C1 is in "on" position, carry out step 4 automatically; If C1 is in gate-dividing state, electric power system sends to the first primary cut-out C1 the order of closing a floodgate, and after the first primary cut-out C1 closes a floodgate successfully, carry out step 4;
Step 4: according to the on off state of the first low-voltage circuit breaker 1DL, judge that the first low-voltage circuit breaker 1DL, whether in "on" position, if the first low-voltage circuit breaker 1DL is in "on" position, carry out step 5 automatically; If the first low-voltage circuit breaker 1DL is in gate-dividing state, electric power system sends to the first low-voltage circuit breaker 1DL the order of closing a floodgate, and after the first low-voltage circuit breaker 1DL closes a floodgate successfully, carry out step 5;
Step 5: according to the on off state of the second primary cut-out C2, judge that the 2nd 500kVA transformer T2 high side switch, whether in "on" position, if the second primary cut-out C2 is in "on" position, carry out step 6 automatically; If the second primary cut-out C2 is in gate-dividing state, electric power system sends to the second primary cut-out C2 the order of closing a floodgate, and after the second primary cut-out C2 closes a floodgate successfully, carry out step 6;
Step 6: according to the on off state of the second low-voltage circuit breaker 2DL, judge that the second low-voltage circuit breaker 2DL, whether in "on" position, if the second low-voltage circuit breaker 2DL is in "on" position, carry out step 7 automatically; If the second low-voltage circuit breaker 2DL is in gate-dividing state, system sends to the second low-voltage circuit breaker 2DL the order of closing a floodgate, and after the second low-voltage circuit breaker 2DL closes a floodgate successfully, carry out step 7;
Step 7: then, electric power system is just in two transformer split operation states, and a 500kVA transformer T1 and the 2nd 500kVA transformer T2 are responsible for the load operation of one section of 0.4KV bus separately; System judges according to the total load situation of two transformers whether current running status is optimum economical operation state; If current running status is optimum economical operation state, keeps current operation running status, and start to carry out economical operation status monitoring; If current running status is not optimum economical operation state, from the most economical state of trend, switch.
The design feature of moving first automatic power transmission control method of a kind of dual transformer electric power system of the present invention is also:
In described step 2, in electric power system, to the 3rd low-voltage circuit breaker 3DL, send after separating brake order, more whether separating brake is successful according to the on off state of the 3rd low-voltage circuit breaker 3DL, to judge the 3rd low-voltage circuit breaker 3DL; If the 3rd low-voltage circuit breaker 3DL separating brake success, enters step 3 automatically; If the 3rd low-voltage circuit breaker 3DL separating brake is unsuccessful, system sends a separating brake order and again judges whether separating brake success to the 3rd low-voltage circuit breaker 3DL again, if separating brake success enters step 3; If the 3rd low-voltage circuit breaker 3DL separating brake is also unsuccessful, send warning information, stop the operation of automatic control flow chart.
In described step 3, in electric power system, to the first primary cut-out C1, send and close a floodgate after order, then judge according to the on off state of the first primary cut-out C1 whether the first primary cut-out C1 closes a floodgate successfully; If the first primary cut-out C1 closes a floodgate successfully, automatically enter step 4; If it is unsuccessful that the first primary cut-out C1 closes a floodgate, system sends to the first primary cut-out C1 the order of once closing a floodgate again, if the first primary cut-out C1 closes a floodgate successfully, automatically enters step 4; If it is also unsuccessful that the first primary cut-out C1 closes a floodgate, send warning information, stop the operation of automatic control flow chart.
In described step 4, in electric power system, to the first low-voltage circuit breaker 1DL, send and close a floodgate after order, according to the on off state of the first low-voltage circuit breaker 1DL, judge whether the first low-voltage circuit breaker 1DL closes a floodgate successfully again, if the first low-voltage circuit breaker 1DL closes a floodgate successfully, automatically enter step 5; If it is unsuccessful that the first low-voltage circuit breaker 1DL closes a floodgate, system sends to the first low-voltage circuit breaker 1DL the order of once closing a floodgate again, if the first low-voltage circuit breaker 1DL closes a floodgate successfully, automatically enters step 5; If it is also unsuccessful that the first low-voltage circuit breaker 1DL closes a floodgate, send warning information, stop the operation of automatic control flow chart.
In described step 5, in electric power system, to the second primary cut-out C2, send and close a floodgate after order, according to the on off state of the second primary cut-out C2, judge whether the second primary cut-out C2 closes a floodgate successfully again, if the second primary cut-out C2 closes a floodgate successfully, automatically enter step 6; If it is unsuccessful that the second primary cut-out C2 closes a floodgate, system sends to the second primary cut-out C2 the order of once closing a floodgate again, if the second primary cut-out C2 closes a floodgate successfully, automatically enters step 6; If it is also unsuccessful that the second primary cut-out C2 closes a floodgate, send warning information, stop the operation of automatic control flow chart.
In described step 6, in electric power system, to the second low-voltage circuit breaker 2DL, send and close a floodgate after order, according to the on off state of the second low-voltage circuit breaker 2DL, judge whether the second low-voltage circuit breaker 2DL closes a floodgate successfully again, if the second low-voltage circuit breaker 2DL closes a floodgate successfully, automatically enter step 7; If it is unsuccessful that the second low-voltage circuit breaker 2DL closes a floodgate, system sends to the second low-voltage circuit breaker 2DL the order of once closing a floodgate again, if the second low-voltage circuit breaker 2DL closes a floodgate successfully, automatically enters step 7; If it is also unsuccessful that the second low-voltage circuit breaker 2DL closes a floodgate, send warning information, stop the operation of automatic control flow chart.
Compared with the prior art, beneficial effect of the present invention is embodied in:
The automatic power transmission control method of operation first of a kind of dual transformer electric power system of the present invention, the first primary cut-out C1, the second primary cut-out C2, the first low-voltage circuit breaker 1DL, the second low-voltage circuit breaker 2DL and the 3rd low-voltage circuit breaker 3DL etc. by controlling dual transformer electric power system are at opening and closing state, thereby control the running status of dual transformer electric power system, and according to the status monitoring of dual transformer electric power system, adjusting dual transformer electric power system makes it can, in most economical running status, reach energy-conservation object all the time.Control method is simple, reaches on the spot the operational mode of control and maximum energy-saving automatically, saves electric energy.By switching manipulation, reasonably optimizing is selected transformer to drop into and is exited, and makes electric power system all the time in economic operation model.
The automatic power transmission control method of operation first of a kind of dual transformer electric power system of the present invention, has and can make can under the operational mode of maximum energy-saving, move after dual transformer electric power system power transmission, simplely can realize the energy-conservation advantages such as object.
Accompanying drawing explanation
Fig. 1 is the flow chart that moves first automatic power transmission control method of a kind of dual transformer electric power system of the present invention.
Fig. 2 is the hardware connection figure of dual transformer electric power system of the present invention.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to accompanying drawing 1～Fig. 2, the automatic power transmission control method of a kind of operation first of dual transformer electric power system.As shown in Figure 2, described dual transformer electric power system comprises 10KV bus, the first primary cut-out C1, the second primary cut-out C2, a 500kVA transformer T1, the 2nd 500kVA transformer T2, the first low-voltage circuit breaker 1DL, the second low-voltage circuit breaker 2DL and the 3rd low-voltage circuit breaker 3DL, 0.4kV I section bus and 0.4kV II section bus; Between described 10KV bus and a 500kVA transformer T1, by the first primary cut-out C1, be connected, between described 10KV bus and the 2nd 500kVA transformer T2, by the second primary cut-out C2, be connected; Between described 0.4kV I section bus and a 500kVA transformer T1, by the first low-voltage circuit breaker 1DL, be connected, between described 0.4kV II section bus and the 2nd 500kVA transformer T2, by the second low-voltage circuit breaker 2DL, be connected; Between described 0.4kV I section bus and described 0.4kV II section bus, by the 3rd low-voltage circuit breaker 3DL, be connected;
Dual transformer electric power system has four kinds of running statuses: a 500kVA transformer T1 isolated operation state, the 2nd 500kVA transformer T2 isolated operation state, two transformer split operation states and two parallel operation of transformers states;
During concrete enforcement, need to detect the voltage, electric current of two station power distribution transformers, meritorious, idle, high-low pressure both sides on off state, low-pressure side bus connection switch state.According to transformer actual motion state, relevant protection device information, in order to judge whether normally switching of distribution transformer, if normal switching, the information that gives a warning, and automatically process as required, make switch reach switching condition.
(1) the one 500kVA transformer T1 isolated operation: now, C1,1DL and 3DL are in "on" position, and C2 and 2DL are in gate-dividing state, and only having T1 is two sections of 0.4kV bussed supplies; It is adjustable that total power load S is less than single transformer capacity 500kVA(capacity data daemon software) 70%(thresholding adjustable) time, after exceeding 10 minutes (time is adjustable), select the set preferential transformer of a 500kVA transformer T1() isolated operation realizes economical operation operation.The one 500kVA transformer T1 continuously operation, after 10 days, carries out automatically switching operation, forwards the operating scheme of the 2nd 500kVA transformer T2 isolated operation to.
(2) the 2nd 500kVA transformer T2 isolated operations: now, C2,2DL and 3DL are in "on" position, and C1 and 1DL are in gate-dividing state, and only having T2 is two sections of 0.4kV bussed supplies; When total power load meets the first service conditions, the 2nd 500kVA transformer T2 also can isolated operation.The 2nd 500kVA transformer T2 continuously operation, after 10 days, carries out automatically switching operation, forwards the operating scheme of a 500kVA transformer T1 isolated operation to.
(3) the one 500kVA transformer T1 and the 2nd 500kVA transformer T2 split operation: now, C1, C2,1DL and 2DL are in "on" position, 3DL is in gate-dividing state, T1 and T2 are respectively 0.4kV I section bus and 0.4kV II section bussed supply, and between 0.4kV I section bus and 0.4kV II section bus, are mutually to disconnect; It is adjustable that total load S is greater than single transformer capacity 500kVA(capacity data daemon software) 80%(thresholding adjustable) after 10 minutes (time is adjustable), carry out two transformer split operations operations.
(4) the one 500kVA transformer T1 and the 2nd 500kVA transformer T2 paired running: now, C1, C2,1DL, 2DL and 3DL are in "on" position, T1 and T2 be 0.4kV I section bus and 0.4kV II section bussed supply simultaneously, between 0.4kV I section bus and 0.4kV II section bus, being interconnective, is state in parallel between T1 and T2; It is adjustable that total load S is greater than two transformer capacity 1000kVA(capacity data daemon softwares) 60%(thresholding adjustable) time, after exceeding 10 minutes (time is adjustable), carry out the operation of two parallel operation of transformers.
Above four kinds of operating schemes are normal operating mode, and other situations are all thought the abnormal running mode that belongs to, any automatic control operation of automatic blocking.
Moving first automatic power transmission control method comprises the steps:
Step 1: after 10KV bus incoming call, electric power system can, according to current all on off states, judge whether to meet described four kinds of running statuses; If meet one of described four kinds of running statuses, automatically transfer met predetermined running state to, start to carry out economical operation status monitoring; If do not meet any predetermined running state in described four kinds of running statuses, automatically carry out step 2;
Step 2: according to the on off state of the 3rd low-voltage circuit breaker 3DL, judge that whether the 3rd low-voltage circuit breaker 3DL is in gate-dividing state; If the 3rd low-voltage circuit breaker 3DL, in gate-dividing state, carry out step 3 automatically; If the 3rd low-voltage circuit breaker 3DL is in "on" position, electric power system sends separating brake order to the 3rd low-voltage circuit breaker 3DL, after the 3rd low-voltage circuit breaker 3DL separating brake success, carry out step 3;
Step 3: according to the on off state of the first primary cut-out C1, judge that a 500kVA transformer T1 high side switch, whether in "on" position, if the first primary cut-out C1 is in "on" position, carry out step 4 automatically; If C1 is in gate-dividing state, electric power system sends to the first primary cut-out C1 the order of closing a floodgate, and after the first primary cut-out C1 closes a floodgate successfully, carry out step 4;
Step 4: according to the on off state of the first low-voltage circuit breaker 1DL, judge that the first low-voltage circuit breaker 1DL, whether in "on" position, if the first low-voltage circuit breaker 1DL is in "on" position, carry out step 5 automatically; If the first low-voltage circuit breaker 1DL is in gate-dividing state, electric power system sends to the first low-voltage circuit breaker 1DL the order of closing a floodgate, and after the first low-voltage circuit breaker 1DL closes a floodgate successfully, carry out step 5;
Step 5: according to the on off state of the second primary cut-out C2, judge that the 2nd 500kVA transformer T2 high side switch, whether in "on" position, if the second primary cut-out C2 is in "on" position, carry out step 6 automatically; If the second primary cut-out C2 is in gate-dividing state, electric power system sends to the second primary cut-out C2 the order of closing a floodgate, and after the second primary cut-out C2 closes a floodgate successfully, carry out step 6;
Step 6: according to the on off state of the second low-voltage circuit breaker 2DL, judge that the second low-voltage circuit breaker 2DL, whether in "on" position, if the second low-voltage circuit breaker 2DL is in "on" position, carry out step 7 automatically; If the second low-voltage circuit breaker 2DL is in gate-dividing state, system sends to the second low-voltage circuit breaker 2DL the order of closing a floodgate, and after the second low-voltage circuit breaker 2DL closes a floodgate successfully, carry out step 7;
Step 7: then, electric power system is just in two transformer split operation states, and a 500kVA transformer T1 and the 2nd 500kVA transformer T2 are responsible for the load operation of one section of 0.4KV bus separately; System judges according to the total load situation of two transformers whether current running status is optimum economical operation state; If current running status is optimum economical operation state, keeps current operation running status, and start to carry out economical operation status monitoring; If current running status is not optimum economical operation state, from the most economical state of trend, switch.
In described step 2, in electric power system, to the 3rd low-voltage circuit breaker 3DL, send after separating brake order, more whether separating brake is successful according to the on off state of the 3rd low-voltage circuit breaker 3DL, to judge the 3rd low-voltage circuit breaker 3DL; If the 3rd low-voltage circuit breaker 3DL separating brake success, enters step 3 automatically; If the 3rd low-voltage circuit breaker 3DL separating brake is unsuccessful, system sends a separating brake order and again judges whether separating brake success to the 3rd low-voltage circuit breaker 3DL again, if separating brake success enters step 3; If the 3rd low-voltage circuit breaker 3DL separating brake is also unsuccessful, send warning information, stop the operation of automatic control flow chart.
In described step 3, in electric power system, to the first primary cut-out C1, send and close a floodgate after order, then judge according to the on off state of the first primary cut-out C1 whether the first primary cut-out C1 closes a floodgate successfully; If the first primary cut-out C1 closes a floodgate successfully, automatically enter step 4; If it is unsuccessful that the first primary cut-out C1 closes a floodgate, system sends to the first primary cut-out C1 the order of once closing a floodgate again, if the first primary cut-out C1 closes a floodgate successfully, automatically enters step 4; If it is also unsuccessful that the first primary cut-out C1 closes a floodgate, send warning information, stop the operation of automatic control flow chart.
In described step 4, in electric power system, to the first low-voltage circuit breaker 1DL, send and close a floodgate after order, according to the on off state of the first low-voltage circuit breaker 1DL, judge whether the first low-voltage circuit breaker 1DL closes a floodgate successfully again, if the first low-voltage circuit breaker 1DL closes a floodgate successfully, automatically enter step 5; If it is unsuccessful that the first low-voltage circuit breaker 1DL closes a floodgate, system sends to the first low-voltage circuit breaker 1DL the order of once closing a floodgate again, if the first low-voltage circuit breaker 1DL closes a floodgate successfully, automatically enters step 5; If it is also unsuccessful that the first low-voltage circuit breaker 1DL closes a floodgate, send warning information, stop the operation of automatic control flow chart.
In described step 5, in electric power system, to the second primary cut-out C2, send and close a floodgate after order, according to the on off state of the second primary cut-out C2, judge whether the second primary cut-out C2 closes a floodgate successfully again, if the second primary cut-out C2 closes a floodgate successfully, automatically enter step 6; If it is unsuccessful that the second primary cut-out C2 closes a floodgate, system sends to the second primary cut-out C2 the order of once closing a floodgate again, if the second primary cut-out C2 closes a floodgate successfully, automatically enters step 6; If it is also unsuccessful that the second primary cut-out C2 closes a floodgate, send warning information, stop the operation of automatic control flow chart.
In described step 6, in electric power system, to the second low-voltage circuit breaker 2DL, send and close a floodgate after order, according to the on off state of the second low-voltage circuit breaker 2DL, judge whether the second low-voltage circuit breaker 2DL closes a floodgate successfully again, if the second low-voltage circuit breaker 2DL closes a floodgate successfully, automatically enter step 7; If it is unsuccessful that the second low-voltage circuit breaker 2DL closes a floodgate, system sends to the second low-voltage circuit breaker 2DL the order of once closing a floodgate again, if the second low-voltage circuit breaker 2DL closes a floodgate successfully, automatically enters step 7; If it is also unsuccessful that the second low-voltage circuit breaker 2DL closes a floodgate, send warning information, stop the operation of automatic control flow chart.
The automatic power transmission control method of operation first of dual transformer electric power system of the present invention, the discriminatory analysis ability of major embodiment logic, complicated criterion is guaranteed system correct operation, system safe, be reliably first-selected, system is by coordinating high and low voltage switch, in the suitable time, drop into or excision transformer, change the operational mode of equipment, make all the time the state of transformer in an economical operation.Energy-conservation is to be based upon the follow-up considerable added value obtaining under the condition of transformer economic operation.
The automatic power transmission control method of operation first of dual transformer electric power system of the present invention, the parameter of using when running status is switched has: the accumulated running time M1 of a 500kVA transformer T1, a 500kVA transformer T1 stop transport for the last time transformer MB of cumulative time TM2, preferential operation of accumulated running time M2, the 2nd 500kVA transformer T2 of cumulative time TM1, the 2nd 500kVA transformer T2 that stops transport for the last time.
Wherein, the accumulated running time M1 of a 500kVA transformer T1;
The one 500kVA transformer T1 stops transport last idle time of cumulative time TM1=current time-T1 for the last time;
The accumulated running time M2 of the 2nd 500kVA transformer T2;
The 2nd 500kVA transformer T2 stops transport last idle time of cumulative time TM2=current time-T2 for the last time;
The transformer sign MB of preferential operation: default value is 1, represents preferential operation the one 500kVA transformer T1, span 1 or 2.During value 2, represent preferential operation the 2nd 500kVA transformer T2.
The parameter that M1, TM1, M2, TM2, MB are Rule of judgment is all to calculate with said method.
In system automatic control process, if because the appearance of external interference factor, and caused automatic system normally to carry out, system can stop automatic control flow chart automatically.External interference factor has three kinds conventionally: 1) human intervention; For example: switch is manually closed a floodgate or separating brake on the spot; 2) switch failure; The process of switching at automatic control switch, surpasses the switch failure that number of times is set, and this fault is generally caused by the hardware fault of switch own; 3) switch protection action; Because the switch protection separating brake action that instantaneity or permanent fault cause appears in load circuit.
After automatic control flow chart stops, must having and manually restart automatic control flow chart, thereby guarantee the fail safe of the inspection and maintenance work of circuit and equipment.
In the automatic power transmission control method of operation first of dual transformer electric power system of the present invention, 2 transformers meet paired running condition: the connection set of (1) Transformer Winding must be identical; (2) voltage change ratio must be identical; (3) impedance voltage should be identical or approaching; (4) capacity can not differ too large; (5) secondary side phase place is identical.
After in power distribution room, transformer meets the demands side by side, 10kV incoming power is that (same transformer station, same 10kV bus, to power distribution room 10kV bussed supply, Fig. 2 is the schematic diagram of dual transformer electric power system to single power supply.
The automatic power transmission control method of operation first of dual transformer electric power system of the present invention, mainly for 2 that put into operation in factories and miness, enterprise and above 10kV distribution transformer, low-voltage power supply system can divide and paired running, according to low-pressure system payload, automatically regulate transformer making time, by the change of running state of transformer, make 2 transformers be in all the time economical operation state, reach on the spot the operational mode of control and maximum energy-saving automatically, save electric energy.By switching manipulation, reasonably optimizing is selected transformer to drop into and is exited, and makes electric power system all the time in economic operation model.
Claims (6)
1. the automatic power transmission control method of the operation first of a dual transformer electric power system, it is characterized in that, as shown in Figure 2, described dual transformer electric power system comprises 10KV bus, the first primary cut-out C1, the second primary cut-out C2, a 500kVA transformer T1, the 2nd 500kVA transformer T2, the first low-voltage circuit breaker 1DL, the second low-voltage circuit breaker 2DL and the 3rd low-voltage circuit breaker 3DL, 0.4kV I section bus and 0.4kV II section bus; Between described 10KV bus and a 500kVA transformer T1, by the first primary cut-out C1, be connected, between described 10KV bus and the 2nd 500kVA transformer T2, by the second primary cut-out C2, be connected; Between described 0.4kV I section bus and a 500kVA transformer T1, by the first low-voltage circuit breaker 1DL, be connected, between described 0.4kV II section bus and the 2nd 500kVA transformer T2, by the second low-voltage circuit breaker 2DL, be connected; Between described 0.4kV I section bus and described 0.4kV II section bus, by the 3rd low-voltage circuit breaker 3DL, be connected.
Dual transformer electric power system has four kinds of running statuses: a 500kVA transformer T1 isolated operation state, the 2nd 500kVA transformer T2 isolated operation state, two transformer split operation states and two parallel operation of transformers states;
Moving first automatic power transmission control method comprises the steps:
Step 1: after 10KV bus incoming call, electric power system can, according to current all on off states, judge whether to meet described four kinds of running statuses; If meet one of described four kinds of running statuses, automatically transfer met predetermined running state to, start to carry out economical operation status monitoring; If do not meet any predetermined running state in described four kinds of running statuses, automatically carry out step 2;
Step 2: according to the on off state of the 3rd low-voltage circuit breaker 3DL, judge that whether the 3rd low-voltage circuit breaker 3DL is in gate-dividing state; If the 3rd low-voltage circuit breaker 3DL, in gate-dividing state, carry out step 3 automatically; If the 3rd low-voltage circuit breaker 3DL is in "on" position, electric power system sends separating brake order to the 3rd low-voltage circuit breaker 3DL, after the 3rd low-voltage circuit breaker 3DL separating brake success, carry out step 3;
Step 3: according to the on off state of the first primary cut-out C1, judge that a 500kVA transformer T1 high side switch, whether in "on" position, if the first primary cut-out C1 is in "on" position, carry out step 4 automatically; If C1 is in gate-dividing state, electric power system sends to the first primary cut-out C1 the order of closing a floodgate, and after the first primary cut-out C1 closes a floodgate successfully, carry out step 4;
Step 4: according to the on off state of the first low-voltage circuit breaker 1DL, judge that the first low-voltage circuit breaker 1DL, whether in "on" position, if the first low-voltage circuit breaker 1DL is in "on" position, carry out step 5 automatically; If the first low-voltage circuit breaker 1DL is in gate-dividing state, electric power system sends to the first low-voltage circuit breaker 1DL the order of closing a floodgate, and after the first low-voltage circuit breaker 1DL closes a floodgate successfully, carry out step 5;
Step 5: according to the on off state of the second primary cut-out C2, judge that the 2nd 500kVA transformer T2 high side switch, whether in "on" position, if the second primary cut-out C2 is in "on" position, carry out step 6 automatically; If the second primary cut-out C2 is in gate-dividing state, electric power system sends to the second primary cut-out C2 the order of closing a floodgate, and after the second primary cut-out C2 closes a floodgate successfully, carry out step 6;
Step 6: according to the on off state of the second low-voltage circuit breaker 2DL, judge that the second low-voltage circuit breaker 2DL, whether in "on" position, if the second low-voltage circuit breaker 2DL is in "on" position, carry out step 7 automatically; If the second low-voltage circuit breaker 2DL is in gate-dividing state, system sends to the second low-voltage circuit breaker 2DL the order of closing a floodgate, and after the second low-voltage circuit breaker 2DL closes a floodgate successfully, carry out step 7;
Step 7: then, electric power system is just in two transformer split operation states, and a 500kVA transformer T1 and the 2nd 500kVA transformer T2 are responsible for the load operation of one section of 0.4KV bus separately; System judges according to the total load situation of two transformers whether current running status is optimum economical operation state; If current running status is optimum economical operation state, keeps current operation running status, and start to carry out economical operation status monitoring; If current running status is not optimum economical operation state, from the most economical state of trend, switch.
2. the automatic power transmission control method of the operation first of a kind of dual transformer electric power system according to claim 1, it is characterized in that, in described step 2, in electric power system, to the 3rd low-voltage circuit breaker 3DL, send after separating brake order, more whether separating brake is successful according to the on off state of the 3rd low-voltage circuit breaker 3DL, to judge the 3rd low-voltage circuit breaker 3DL; If the 3rd low-voltage circuit breaker 3DL separating brake success, enters step 3 automatically; If the 3rd low-voltage circuit breaker 3DL separating brake is unsuccessful, system sends a separating brake order and again judges whether separating brake success to the 3rd low-voltage circuit breaker 3DL again, if separating brake success enters step 3; If the 3rd low-voltage circuit breaker 3DL separating brake is also unsuccessful, send warning information, stop the operation of automatic control flow chart.
3. according to the automatic power transmission control method of the operation first of a kind of dual transformer electric power system described in claim 1 and 2, it is characterized in that, in described step 3, in electric power system, to the first primary cut-out C1, send and close a floodgate after order, then judge according to the on off state of the first primary cut-out C1 whether the first primary cut-out C1 closes a floodgate successfully; If the first primary cut-out C1 closes a floodgate successfully, automatically enter step 4; If it is unsuccessful that the first primary cut-out C1 closes a floodgate, system sends to the first primary cut-out C1 the order of once closing a floodgate again, if the first primary cut-out C1 closes a floodgate successfully, automatically enters step 4; If it is also unsuccessful that the first primary cut-out C1 closes a floodgate, send warning information, stop the operation of automatic control flow chart.
4. the automatic power transmission control method of the operation first of a kind of dual transformer electric power system according to claim 1, it is characterized in that, in described step 4, in electric power system, to the first low-voltage circuit breaker 1DL, send and close a floodgate after order, according to the on off state of the first low-voltage circuit breaker 1DL, judge whether the first low-voltage circuit breaker 1DL closes a floodgate successfully again, if the first low-voltage circuit breaker 1DL closes a floodgate successfully, automatically enter step 5; If it is unsuccessful that the first low-voltage circuit breaker 1DL closes a floodgate, system sends to the first low-voltage circuit breaker 1DL the order of once closing a floodgate again, if the first low-voltage circuit breaker 1DL closes a floodgate successfully, automatically enters step 5; If it is also unsuccessful that the first low-voltage circuit breaker 1DL closes a floodgate, send warning information, stop the operation of automatic control flow chart.
5. the automatic power transmission control method of the operation first of a kind of dual transformer electric power system according to claim 1, it is characterized in that, in described step 5, in electric power system, to the second primary cut-out C2, send and close a floodgate after order, according to the on off state of the second primary cut-out C2, judge whether the second primary cut-out C2 closes a floodgate successfully again, if the second primary cut-out C2 closes a floodgate successfully, automatically enter step 6; If it is unsuccessful that the second primary cut-out C2 closes a floodgate, system sends to the second primary cut-out C2 the order of once closing a floodgate again, if the second primary cut-out C2 closes a floodgate successfully, automatically enters step 6; If it is also unsuccessful that the second primary cut-out C2 closes a floodgate, send warning information, stop the operation of automatic control flow chart.
6. the automatic power transmission control method of the operation first of a kind of dual transformer electric power system according to claim 1, it is characterized in that, in described step 6, in electric power system, to the second low-voltage circuit breaker 2DL, send and close a floodgate after order, according to the on off state of the second low-voltage circuit breaker 2DL, judge whether the second low-voltage circuit breaker 2DL closes a floodgate successfully again, if the second low-voltage circuit breaker 2DL closes a floodgate successfully, automatically enter step 7; If it is unsuccessful that the second low-voltage circuit breaker 2DL closes a floodgate, system sends to the second low-voltage circuit breaker 2DL the order of once closing a floodgate again, if the second low-voltage circuit breaker 2DL closes a floodgate successfully, automatically enters step 7; If it is also unsuccessful that the second low-voltage circuit breaker 2DL closes a floodgate, send warning information, stop the operation of automatic control flow chart.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310637744.XA CN103606930A (en) | 2013-11-29 | 2013-11-29 | Method for controlling automatic delivery of currents for first time running of double-transformer power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310637744.XA CN103606930A (en) | 2013-11-29 | 2013-11-29 | Method for controlling automatic delivery of currents for first time running of double-transformer power supply system |
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