从单机到集群:servers部署、监控与故障排查实战指南
2026/10/31 9:58:16
配电网故障恢复是电力系统运行中的关键环节,尤其在分布式电源(DG)大量接入的现代电网中。传统故障恢复策略往往将网络重构和孤岛运行分开考虑,这可能导致以下问题:
我们提出的方法通过建立统一优化模型,同步考虑:
采用多目标加权优化方法,主要考虑三个维度:
% 目标函数示例 function f = objective(x) % x: 决策变量向量 f1 = 总停电负荷; % 最小化停电负荷 f2 = 开关操作次数; % 最小化开关动作 f3 = 网损; % 最小化网络损耗 w = [0.6, 0.3, 0.1]; % 权重系数 f = w(1)*f1 + w(2)*f2 + w(3)*f3; end关键约束包括:
将非线性问题转化为可高效求解的凸优化问题:
cvx_begin variable x(n) binary variable y(m) minimize( w'*[f1; f2; f3] ) subject to % 潮流约束 for k = 1:branch_num norm([2*P(k); 2*Q(k); (I(k)-V(k))]) <= I(k) + V(k); end % 拓扑约束 sum(x) == node_num - 1; % 其他约束... cvx_end基于深度优先搜索(DFS)的改进算法:
function islands = find_islands(adj_matrix, dg_nodes) visited = false(1, size(adj_matrix,1)); islands = {}; for node = dg_nodes if ~visited(node) stack = node; component = []; while ~isempty(stack) current = stack(end); stack(end) = []; if ~visited(current) visited(current) = true; component = [component, current]; neighbors = find(adj_matrix(current,:)); stack = [stack, setdiff(neighbors, component)]; end end islands{end+1} = component; end end end参数设置示例:
| 指标 | 仅重构 | 仅孤岛 | 联合优化 |
|---|---|---|---|
| 停电负荷(kW) | 428 | 352 | 215 |
| 开关操作次数 | 4 | 3 | 5 |
| 恢复时间(s) | 12.6 | 8.3 | 15.2 |
% 生成候选开关组合 candidates = generate_candidates(base_case, fault_location); feasible = false(size(candidates,1),1); parfor i = 1:size(candidates,1) feasible(i) = check_radial(candidates(i,:)); end valid_candidates = candidates(feasible,:);% 设置并行池 if isempty(gcp('nocreate')) parpool('local',4); % 使用4个核心 endfunction plot_topology(branch, node, islands) % branch: 支路连接关系 % node: 节点信息 % islands: 孤岛划分结果 g = graph(branch(:,1), branch(:,2)); h = plot(g, 'XData', node.x, 'YData', node.y); % 标记孤岛 colors = lines(length(islands)); for i = 1:length(islands) highlight(h, islands{i}, 'NodeColor', colors(i,:)); end endoptions = optimoptions('intlinprog',... 'Display','iter',... 'OutputFcn',@savetohist); function stop = savetohist(~,optimValues,~) persistent history if optimValues.phase == "rootlp" history = [history; optimValues.fval]; end stop = false; end% 对整数变量进行连续化松弛 options = optimoptions('intlinprog','Relaxation',1); [x,fval] = intlinprog(f,intcon,A,b,Aeq,beq,lb,ub,options); % 逐步收紧约束 for tol = [1e-2, 1e-3, 1e-4] options.ConstraintTolerance = tol; [x,fval] = intlinprog(f,intcon,A,b,Aeq,beq,lb,ub,options); if ~isempty(x) break; end end% 基于专家规则生成初始解 initial_solution = heuristic_initialization(fault_location); % 使用遗传算法获取初始种群 ga_options = optimoptions('ga','Display','off'); x0 = ga(@objective,nvars,[],[],[],[],lb,ub,[],ga_options);% 构建稀疏导纳矩阵 n = length(node); Ybus = sparse(n,n); for k = 1:size(branch,1) i = branch(k,1); j = branch(k,2); Ybus(i,j) = -1/branch(k,3); Ybus(j,i) = Ybus(i,j); Ybus(i,i) = Ybus(i,i) + 1/branch(k,3); Ybus(j,j) = Ybus(j,j) + 1/branch(k,3); end% 预分配结果存储空间 max_iter = 100; results = struct('x',cell(max_iter,1),... 'fval',zeros(max_iter,1),... 'time',zeros(max_iter,1));function is_safe = safety_check(solution) % 校验拓扑辐射性 if ~check_radial(solution.topology) is_safe = false; return end % 校验电压越限 if any(solution.voltage < 0.95) || any(solution.voltage > 1.05) is_safe = false; return end % 其他校验... is_safe = true; end